"#if 0" removal: header files

[thirdparty/openssl.git] / ssl / ssl.h

/* ssl/ssl.h */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#ifndef HEADER_SSL_H
# define HEADER_SSL_H

# include <openssl/e_os2.h>

# ifndef OPENSSL_NO_COMP
#  include <openssl/comp.h>
# endif
# include <openssl/bio.h>
# ifdef OPENSSL_USE_DEPRECATED
#  include <openssl/x509.h>
#  include <openssl/crypto.h>
#  include <openssl/lhash.h>
#  include <openssl/buffer.h>
# endif
# include <openssl/pem.h>
# include <openssl/hmac.h>

# include <openssl/kssl.h>
# include <openssl/safestack.h>
# include <openssl/symhacks.h>

#ifdef  __cplusplus
extern "C" {
#endif

/* SSLeay version number for ASN.1 encoding of the session information */
/*-
 * Version 0 - initial version
 * Version 1 - added the optional peer certificate
 */
# define SSL_SESSION_ASN1_VERSION 0x0001

/* text strings for the ciphers */

/*
 * VRS Additional Kerberos5 entries
 */
# define SSL_TXT_KRB5_DES_64_CBC_SHA   SSL3_TXT_KRB5_DES_64_CBC_SHA
# define SSL_TXT_KRB5_DES_192_CBC3_SHA SSL3_TXT_KRB5_DES_192_CBC3_SHA
# define SSL_TXT_KRB5_RC4_128_SHA      SSL3_TXT_KRB5_RC4_128_SHA
# define SSL_TXT_KRB5_IDEA_128_CBC_SHA SSL3_TXT_KRB5_IDEA_128_CBC_SHA
# define SSL_TXT_KRB5_DES_64_CBC_MD5   SSL3_TXT_KRB5_DES_64_CBC_MD5
# define SSL_TXT_KRB5_DES_192_CBC3_MD5 SSL3_TXT_KRB5_DES_192_CBC3_MD5
# define SSL_TXT_KRB5_RC4_128_MD5      SSL3_TXT_KRB5_RC4_128_MD5
# define SSL_TXT_KRB5_IDEA_128_CBC_MD5 SSL3_TXT_KRB5_IDEA_128_CBC_MD5

# define SSL_TXT_KRB5_DES_40_CBC_SHA   SSL3_TXT_KRB5_DES_40_CBC_SHA
# define SSL_TXT_KRB5_RC2_40_CBC_SHA   SSL3_TXT_KRB5_RC2_40_CBC_SHA
# define SSL_TXT_KRB5_RC4_40_SHA       SSL3_TXT_KRB5_RC4_40_SHA
# define SSL_TXT_KRB5_DES_40_CBC_MD5   SSL3_TXT_KRB5_DES_40_CBC_MD5
# define SSL_TXT_KRB5_RC2_40_CBC_MD5   SSL3_TXT_KRB5_RC2_40_CBC_MD5
# define SSL_TXT_KRB5_RC4_40_MD5       SSL3_TXT_KRB5_RC4_40_MD5

# define SSL_TXT_KRB5_DES_40_CBC_SHA   SSL3_TXT_KRB5_DES_40_CBC_SHA
# define SSL_TXT_KRB5_DES_40_CBC_MD5   SSL3_TXT_KRB5_DES_40_CBC_MD5
# define SSL_TXT_KRB5_DES_64_CBC_SHA   SSL3_TXT_KRB5_DES_64_CBC_SHA
# define SSL_TXT_KRB5_DES_64_CBC_MD5   SSL3_TXT_KRB5_DES_64_CBC_MD5
# define SSL_TXT_KRB5_DES_192_CBC3_SHA SSL3_TXT_KRB5_DES_192_CBC3_SHA
# define SSL_TXT_KRB5_DES_192_CBC3_MD5 SSL3_TXT_KRB5_DES_192_CBC3_MD5
# define SSL_MAX_KRB5_PRINCIPAL_LENGTH  256

# define SSL_MAX_SSL_SESSION_ID_LENGTH           32
# define SSL_MAX_SID_CTX_LENGTH                  32

# define SSL_MIN_RSA_MODULUS_LENGTH_IN_BYTES     (512/8)
# define SSL_MAX_KEY_ARG_LENGTH                  8
# define SSL_MAX_MASTER_KEY_LENGTH               48

/* These are used to specify which ciphers to use and not to use */

# define SSL_TXT_EXP40           "EXPORT40"
# define SSL_TXT_EXP56           "EXPORT56"
# define SSL_TXT_LOW             "LOW"
# define SSL_TXT_MEDIUM          "MEDIUM"
# define SSL_TXT_HIGH            "HIGH"
# define SSL_TXT_FIPS            "FIPS"

# define SSL_TXT_kFZA            "kFZA"/* unused! */
# define SSL_TXT_aFZA            "aFZA"/* unused! */
# define SSL_TXT_eFZA            "eFZA"/* unused! */
# define SSL_TXT_FZA             "FZA"/* unused! */

# define SSL_TXT_aNULL           "aNULL"
# define SSL_TXT_eNULL           "eNULL"
# define SSL_TXT_NULL            "NULL"

# define SSL_TXT_kRSA            "kRSA"
# define SSL_TXT_kDHr            "kDHr"
# define SSL_TXT_kDHd            "kDHd"
# define SSL_TXT_kDH             "kDH"
# define SSL_TXT_kEDH            "kEDH"/* alias for kDHE */
# define SSL_TXT_kDHE            "kDHE"
# define SSL_TXT_kKRB5           "kKRB5"
# define SSL_TXT_kECDHr          "kECDHr"
# define SSL_TXT_kECDHe          "kECDHe"
# define SSL_TXT_kECDH           "kECDH"
# define SSL_TXT_kEECDH          "kEECDH"/* alias for kECDHE */
# define SSL_TXT_kECDHE          "kECDHE"
# define SSL_TXT_kPSK            "kPSK"
# define SSL_TXT_kGOST           "kGOST"
# define SSL_TXT_kSRP            "kSRP"

# define SSL_TXT_aRSA            "aRSA"
# define SSL_TXT_aDSS            "aDSS"
# define SSL_TXT_aDH             "aDH"
# define SSL_TXT_aECDH           "aECDH"
# define SSL_TXT_aKRB5           "aKRB5"
# define SSL_TXT_aECDSA          "aECDSA"
# define SSL_TXT_aPSK            "aPSK"
# define SSL_TXT_aGOST94 "aGOST94"
# define SSL_TXT_aGOST01 "aGOST01"
# define SSL_TXT_aGOST  "aGOST"
# define SSL_TXT_aSRP            "aSRP"

# define SSL_TXT_DSS             "DSS"
# define SSL_TXT_DH              "DH"
# define SSL_TXT_DHE             "DHE"/* same as "kDHE:-ADH" */
# define SSL_TXT_EDH             "EDH"/* alias for DHE */
# define SSL_TXT_ADH             "ADH"
# define SSL_TXT_RSA             "RSA"
# define SSL_TXT_ECDH            "ECDH"
# define SSL_TXT_EECDH           "EECDH"/* alias for ECDHE" */
# define SSL_TXT_ECDHE           "ECDHE"/* same as "kECDHE:-AECDH" */
# define SSL_TXT_AECDH           "AECDH"
# define SSL_TXT_ECDSA           "ECDSA"
# define SSL_TXT_KRB5            "KRB5"
# define SSL_TXT_PSK             "PSK"
# define SSL_TXT_SRP             "SRP"

# define SSL_TXT_DES             "DES"
# define SSL_TXT_3DES            "3DES"
# define SSL_TXT_RC4             "RC4"
# define SSL_TXT_RC2             "RC2"
# define SSL_TXT_IDEA            "IDEA"
# define SSL_TXT_SEED            "SEED"
# define SSL_TXT_AES128          "AES128"
# define SSL_TXT_AES256          "AES256"
# define SSL_TXT_AES             "AES"
# define SSL_TXT_AES_GCM         "AESGCM"
# define SSL_TXT_CAMELLIA128     "CAMELLIA128"
# define SSL_TXT_CAMELLIA256     "CAMELLIA256"
# define SSL_TXT_CAMELLIA        "CAMELLIA"

# define SSL_TXT_MD5             "MD5"
# define SSL_TXT_SHA1            "SHA1"
# define SSL_TXT_SHA             "SHA"/* same as "SHA1" */
# define SSL_TXT_GOST94          "GOST94"
# define SSL_TXT_GOST89MAC               "GOST89MAC"
# define SSL_TXT_SHA256          "SHA256"
# define SSL_TXT_SHA384          "SHA384"

# define SSL_TXT_SSLV3           "SSLv3"
# define SSL_TXT_TLSV1           "TLSv1"
# define SSL_TXT_TLSV1_1         "TLSv1.1"
# define SSL_TXT_TLSV1_2         "TLSv1.2"

# define SSL_TXT_EXP             "EXP"
# define SSL_TXT_EXPORT          "EXPORT"

# define SSL_TXT_ALL             "ALL"

/*-
 * COMPLEMENTOF* definitions. These identifiers are used to (de-select)
 * ciphers normally not being used.
 * Example: "RC4" will activate all ciphers using RC4 including ciphers
 * without authentication, which would normally disabled by DEFAULT (due
 * the "!ADH" being part of default). Therefore "RC4:!COMPLEMENTOFDEFAULT"
 * will make sure that it is also disabled in the specific selection.
 * COMPLEMENTOF* identifiers are portable between version, as adjustments
 * to the default cipher setup will also be included here.
 *
 * COMPLEMENTOFDEFAULT does not experience the same special treatment that
 * DEFAULT gets, as only selection is being done and no sorting as needed
 * for DEFAULT.
 */
# define SSL_TXT_CMPALL          "COMPLEMENTOFALL"
# define SSL_TXT_CMPDEF          "COMPLEMENTOFDEFAULT"

/*
 * The following cipher list is used by default. It also is substituted when
 * an application-defined cipher list string starts with 'DEFAULT'.
 */
# define SSL_DEFAULT_CIPHER_LIST "ALL:!aNULL:!eNULL"
/*
 * As of OpenSSL 1.0.0, ssl_create_cipher_list() in ssl/ssl_ciph.c always
 * starts with a reasonable order, and all we have to do for DEFAULT is
 * throwing out anonymous and unencrypted ciphersuites! (The latter are not
 * actually enabled by ALL, but "ALL:RSA" would enable some of them.)
 */

/* Used in SSL_set_shutdown()/SSL_get_shutdown(); */
# define SSL_SENT_SHUTDOWN       1
# define SSL_RECEIVED_SHUTDOWN   2

#ifdef __cplusplus
}
#endif

#ifdef  __cplusplus
extern "C" {
#endif

# define SSL_FILETYPE_ASN1       X509_FILETYPE_ASN1
# define SSL_FILETYPE_PEM        X509_FILETYPE_PEM

/*
 * This is needed to stop compilers complaining about the 'struct ssl_st *'
 * function parameters used to prototype callbacks in SSL_CTX.
 */
typedef struct ssl_st *ssl_crock_st;
typedef struct tls_session_ticket_ext_st TLS_SESSION_TICKET_EXT;
typedef struct ssl_method_st SSL_METHOD;
typedef struct ssl_cipher_st SSL_CIPHER;
typedef struct ssl_session_st SSL_SESSION;
typedef struct tls_sigalgs_st TLS_SIGALGS;
typedef struct ssl_conf_ctx_st SSL_CONF_CTX;

DECLARE_STACK_OF(SSL_CIPHER)

/* SRTP protection profiles for use with the use_srtp extension (RFC 5764)*/
typedef struct srtp_protection_profile_st {
    const char *name;
    unsigned long id;
} SRTP_PROTECTION_PROFILE;

DECLARE_STACK_OF(SRTP_PROTECTION_PROFILE)

typedef int (*tls_session_ticket_ext_cb_fn) (SSL *s,
                                             const unsigned char *data,
                                             int len, void *arg);
typedef int (*tls_session_secret_cb_fn) (SSL *s, void *secret,
                                         int *secret_len,
                                         STACK_OF(SSL_CIPHER) *peer_ciphers,
                                         SSL_CIPHER **cipher, void *arg);

# ifndef OPENSSL_NO_TLSEXT

/* Typedefs for handling custom extensions */

typedef int (*custom_ext_add_cb) (SSL *s, unsigned int ext_type,
                                  const unsigned char **out,
                                  size_t *outlen, int *al, void *add_arg);

typedef void (*custom_ext_free_cb) (SSL *s, unsigned int ext_type,
                                    const unsigned char *out, void *add_arg);

typedef int (*custom_ext_parse_cb) (SSL *s, unsigned int ext_type,
                                    const unsigned char *in,
                                    size_t inlen, int *al, void *parse_arg);

# endif

# ifndef OPENSSL_NO_SSL_INTERN

/* used to hold info on the particular ciphers used */
struct ssl_cipher_st {
    int valid;
    const char *name;           /* text name */
    unsigned long id;           /* id, 4 bytes, first is version */
    /*
     * changed in 0.9.9: these four used to be portions of a single value
     * 'algorithms'
     */
    unsigned long algorithm_mkey; /* key exchange algorithm */
    unsigned long algorithm_auth; /* server authentication */
    unsigned long algorithm_enc; /* symmetric encryption */
    unsigned long algorithm_mac; /* symmetric authentication */
    unsigned long algorithm_ssl; /* (major) protocol version */
    unsigned long algo_strength; /* strength and export flags */
    unsigned long algorithm2;   /* Extra flags */
    int strength_bits;          /* Number of bits really used */
    int alg_bits;               /* Number of bits for algorithm */
};

/* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
struct ssl_method_st {
    int version;
    int (*ssl_new) (SSL *s);
    void (*ssl_clear) (SSL *s);
    void (*ssl_free) (SSL *s);
    int (*ssl_accept) (SSL *s);
    int (*ssl_connect) (SSL *s);
    int (*ssl_read) (SSL *s, void *buf, int len);
    int (*ssl_peek) (SSL *s, void *buf, int len);
    int (*ssl_write) (SSL *s, const void *buf, int len);
    int (*ssl_shutdown) (SSL *s);
    int (*ssl_renegotiate) (SSL *s);
    int (*ssl_renegotiate_check) (SSL *s);
    long (*ssl_get_message) (SSL *s, int st1, int stn, int mt, long
                             max, int *ok);
    int (*ssl_read_bytes) (SSL *s, int type, unsigned char *buf, int len,
                           int peek);
    int (*ssl_write_bytes) (SSL *s, int type, const void *buf_, int len);
    int (*ssl_dispatch_alert) (SSL *s);
    long (*ssl_ctrl) (SSL *s, int cmd, long larg, void *parg);
    long (*ssl_ctx_ctrl) (SSL_CTX *ctx, int cmd, long larg, void *parg);
    const SSL_CIPHER *(*get_cipher_by_char) (const unsigned char *ptr);
    int (*put_cipher_by_char) (const SSL_CIPHER *cipher, unsigned char *ptr);
    int (*ssl_pending) (const SSL *s);
    int (*num_ciphers) (void);
    const SSL_CIPHER *(*get_cipher) (unsigned ncipher);
    const struct ssl_method_st *(*get_ssl_method) (int version);
    long (*get_timeout) (void);
    const struct ssl3_enc_method *ssl3_enc; /* Extra SSLv3/TLS stuff */
    int (*ssl_version) (void);
    long (*ssl_callback_ctrl) (SSL *s, int cb_id, void (*fp) (void));
    long (*ssl_ctx_callback_ctrl) (SSL_CTX *s, int cb_id, void (*fp) (void));
};

/*-
 * Lets make this into an ASN.1 type structure as follows
 * SSL_SESSION_ID ::= SEQUENCE {
 *      version                 INTEGER,        -- structure version number
 *      SSLversion              INTEGER,        -- SSL version number
 *      Cipher                  OCTET STRING,   -- the 3 byte cipher ID
 *      Session_ID              OCTET STRING,   -- the Session ID
 *      Master_key              OCTET STRING,   -- the master key
 *      KRB5_principal          OCTET STRING    -- optional Kerberos principal
 *      Key_Arg [ 0 ] IMPLICIT  OCTET STRING,   -- the optional Key argument
 *      Time [ 1 ] EXPLICIT     INTEGER,        -- optional Start Time
 *      Timeout [ 2 ] EXPLICIT  INTEGER,        -- optional Timeout ins seconds
 *      Peer [ 3 ] EXPLICIT     X509,           -- optional Peer Certificate
 *      Session_ID_context [ 4 ] EXPLICIT OCTET STRING,   -- the Session ID context
 *      Verify_result [ 5 ] EXPLICIT INTEGER,   -- X509_V_... code for `Peer'
 *      HostName [ 6 ] EXPLICIT OCTET STRING,   -- optional HostName from servername TLS extension
 *      PSK_identity_hint [ 7 ] EXPLICIT OCTET STRING, -- optional PSK identity hint
 *      PSK_identity [ 8 ] EXPLICIT OCTET STRING,  -- optional PSK identity
 *      Ticket_lifetime_hint [9] EXPLICIT INTEGER, -- server's lifetime hint for session ticket
 *      Ticket [10]             EXPLICIT OCTET STRING, -- session ticket (clients only)
 *      Compression_meth [11]   EXPLICIT OCTET STRING, -- optional compression method
 *      SRP_username [ 12 ] EXPLICIT OCTET STRING -- optional SRP username
 *      }
 * Look in ssl/ssl_asn1.c for more details
 * I'm using EXPLICIT tags so I can read the damn things using asn1parse :-).
 */
struct ssl_session_st {
    int ssl_version;            /* what ssl version session info is being
                                 * kept in here? */
    int master_key_length;
    unsigned char master_key[SSL_MAX_MASTER_KEY_LENGTH];
    /* session_id - valid? */
    unsigned int session_id_length;
    unsigned char session_id[SSL_MAX_SSL_SESSION_ID_LENGTH];
    /*
     * this is used to determine whether the session is being reused in the
     * appropriate context. It is up to the application to set this, via
     * SSL_new
     */
    unsigned int sid_ctx_length;
    unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
#  ifndef OPENSSL_NO_KRB5
    unsigned int krb5_client_princ_len;
    unsigned char krb5_client_princ[SSL_MAX_KRB5_PRINCIPAL_LENGTH];
#  endif                        /* OPENSSL_NO_KRB5 */
#  ifndef OPENSSL_NO_PSK
    char *psk_identity_hint;
    char *psk_identity;
#  endif
    /*
     * Used to indicate that session resumption is not allowed. Applications
     * can also set this bit for a new session via not_resumable_session_cb
     * to disable session caching and tickets.
     */
    int not_resumable;
    /* The cert is the certificate used to establish this connection */
    struct sess_cert_st /* SESS_CERT */ *sess_cert;
    /*
     * This is the cert for the other end. On clients, it will be the same as
     * sess_cert->peer_key->x509 (the latter is not enough as sess_cert is
     * not retained in the external representation of sessions, see
     * ssl_asn1.c).
     */
    X509 *peer;
    /*
     * when app_verify_callback accepts a session where the peer's
     * certificate is not ok, we must remember the error for session reuse:
     */
    long verify_result;         /* only for servers */
    int references;
    long timeout;
    long time;
    unsigned int compress_meth; /* Need to lookup the method */
    const SSL_CIPHER *cipher;
    unsigned long cipher_id;    /* when ASN.1 loaded, this needs to be used
                                 * to load the 'cipher' structure */
    STACK_OF(SSL_CIPHER) *ciphers; /* shared ciphers? */
    CRYPTO_EX_DATA ex_data;     /* application specific data */
    /*
     * These are used to make removal of session-ids more efficient and to
     * implement a maximum cache size.
     */
    struct ssl_session_st *prev, *next;
#  ifndef OPENSSL_NO_TLSEXT
    char *tlsext_hostname;
#   ifndef OPENSSL_NO_EC
    size_t tlsext_ecpointformatlist_length;
    unsigned char *tlsext_ecpointformatlist; /* peer's list */
    size_t tlsext_ellipticcurvelist_length;
    unsigned char *tlsext_ellipticcurvelist; /* peer's list */
#   endif                       /* OPENSSL_NO_EC */
    /* RFC4507 info */
    unsigned char *tlsext_tick; /* Session ticket */
    size_t tlsext_ticklen;      /* Session ticket length */
    long tlsext_tick_lifetime_hint; /* Session lifetime hint in seconds */
#  endif
#  ifndef OPENSSL_NO_SRP
    char *srp_username;
#  endif
};

# endif

/* Allow initial connection to servers that don't support RI */
# define SSL_OP_LEGACY_SERVER_CONNECT                    0x00000004L
# define SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG         0x00000008L
# define SSL_OP_TLSEXT_PADDING                           0x00000010L
# define SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER               0x00000020L
# define SSL_OP_SAFARI_ECDHE_ECDSA_BUG                   0x00000040L
# define SSL_OP_SSLEAY_080_CLIENT_DH_BUG                 0x00000080L
# define SSL_OP_TLS_D5_BUG                               0x00000100L
# define SSL_OP_TLS_BLOCK_PADDING_BUG                    0x00000200L

/* Hasn't done anything since OpenSSL 0.9.7h, retained for compatibility */
# define SSL_OP_MSIE_SSLV2_RSA_PADDING                   0x0
/* Refers to ancient SSLREF and SSLv2, retained for compatibility */
# define SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG              0x0
/* Related to removed SSLv2 */
# define SSL_OP_MICROSOFT_SESS_ID_BUG                    0x0
# define SSL_OP_NETSCAPE_CHALLENGE_BUG                   0x0

/*
 * Disable SSL 3.0/TLS 1.0 CBC vulnerability workaround that was added in
 * OpenSSL 0.9.6d.  Usually (depending on the application protocol) the
 * workaround is not needed.  Unfortunately some broken SSL/TLS
 * implementations cannot handle it at all, which is why we include it in
 * SSL_OP_ALL.
 */
/* added in 0.9.6e */
# define SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS              0x00000800L

/*
 * SSL_OP_ALL: various bug workarounds that should be rather harmless.  This
 * used to be 0x000FFFFFL before 0.9.7.
 */
# define SSL_OP_ALL                                      0x80000BFFL

/* DTLS options */
# define SSL_OP_NO_QUERY_MTU                 0x00001000L
/* Turn on Cookie Exchange (on relevant for servers) */
# define SSL_OP_COOKIE_EXCHANGE              0x00002000L
/* Don't use RFC4507 ticket extension */
# define SSL_OP_NO_TICKET                    0x00004000L
/* Use Cisco's "speshul" version of DTLS_BAD_VER (as client)  */
# define SSL_OP_CISCO_ANYCONNECT             0x00008000L

/* As server, disallow session resumption on renegotiation */
# define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION   0x00010000L
/* Don't use compression even if supported */
# define SSL_OP_NO_COMPRESSION                           0x00020000L
/* Permit unsafe legacy renegotiation */
# define SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION        0x00040000L
/* If set, always create a new key when using tmp_ecdh parameters */
# define SSL_OP_SINGLE_ECDH_USE                          0x00080000L
/* If set, always create a new key when using tmp_dh parameters */
# define SSL_OP_SINGLE_DH_USE                            0x00100000L
/* Does nothing: retained for compatibiity */
# define SSL_OP_EPHEMERAL_RSA                            0x0
/*
 * Set on servers to choose the cipher according to the server's preferences
 */
# define SSL_OP_CIPHER_SERVER_PREFERENCE                 0x00400000L
/*
 * If set, a server will allow a client to issue a SSLv3.0 version number as
 * latest version supported in the premaster secret, even when TLSv1.0
 * (version 3.1) was announced in the client hello. Normally this is
 * forbidden to prevent version rollback attacks.
 */
# define SSL_OP_TLS_ROLLBACK_BUG                         0x00800000L

# define SSL_OP_NO_SSLv2                                 0x00000000L
# define SSL_OP_NO_SSLv3                                 0x02000000L
# define SSL_OP_NO_TLSv1                                 0x04000000L
# define SSL_OP_NO_TLSv1_2                               0x08000000L
# define SSL_OP_NO_TLSv1_1                               0x10000000L

# define SSL_OP_NO_DTLSv1                                0x04000000L
# define SSL_OP_NO_DTLSv1_2                              0x08000000L

# define SSL_OP_NO_SSL_MASK (SSL_OP_NO_SSLv3|\
        SSL_OP_NO_TLSv1|SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1_2)

/*
 * These next two were never actually used for anything since SSLeay zap so
 * we have some more flags.
 */
/*
 * The next flag deliberately changes the ciphertest, this is a check for the
 * PKCS#1 attack
 */
# define SSL_OP_PKCS1_CHECK_1                            0x0
# define SSL_OP_PKCS1_CHECK_2                            0x0

# define SSL_OP_NETSCAPE_CA_DN_BUG                       0x20000000L
# define SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG          0x40000000L
/*
 * Make server add server-hello extension from early version of cryptopro
 * draft, when GOST ciphersuite is negotiated. Required for interoperability
 * with CryptoPro CSP 3.x
 */
# define SSL_OP_CRYPTOPRO_TLSEXT_BUG                     0x80000000L

/*
 * Allow SSL_write(..., n) to return r with 0 < r < n (i.e. report success
 * when just a single record has been written):
 */
# define SSL_MODE_ENABLE_PARTIAL_WRITE       0x00000001L
/*
 * Make it possible to retry SSL_write() with changed buffer location (buffer
 * contents must stay the same!); this is not the default to avoid the
 * misconception that non-blocking SSL_write() behaves like non-blocking
 * write():
 */
# define SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER 0x00000002L
/*
 * Never bother the application with retries if the transport is blocking:
 */
# define SSL_MODE_AUTO_RETRY 0x00000004L
/* Don't attempt to automatically build certificate chain */
# define SSL_MODE_NO_AUTO_CHAIN 0x00000008L
/*
 * Save RAM by releasing read and write buffers when they're empty. (SSL3 and
 * TLS only.) "Released" buffers are put onto a free-list in the context or
 * just freed (depending on the context's setting for freelist_max_len).
 */
# define SSL_MODE_RELEASE_BUFFERS 0x00000010L
/*
 * Send the current time in the Random fields of the ClientHello and
 * ServerHello records for compatibility with hypothetical implementations
 * that require it.
 */
# define SSL_MODE_SEND_CLIENTHELLO_TIME 0x00000020L
# define SSL_MODE_SEND_SERVERHELLO_TIME 0x00000040L
/*
 * Send TLS_FALLBACK_SCSV in the ClientHello. To be set only by applications
 * that reconnect with a downgraded protocol version; see
 * draft-ietf-tls-downgrade-scsv-00 for details. DO NOT ENABLE THIS if your
 * application attempts a normal handshake. Only use this in explicit
 * fallback retries, following the guidance in
 * draft-ietf-tls-downgrade-scsv-00.
 */
# define SSL_MODE_SEND_FALLBACK_SCSV 0x00000080L

/* Cert related flags */
/*
 * Many implementations ignore some aspects of the TLS standards such as
 * enforcing certifcate chain algorithms. When this is set we enforce them.
 */
# define SSL_CERT_FLAG_TLS_STRICT                0x00000001L

/* Suite B modes, takes same values as certificate verify flags */
# define SSL_CERT_FLAG_SUITEB_128_LOS_ONLY       0x10000
/* Suite B 192 bit only mode */
# define SSL_CERT_FLAG_SUITEB_192_LOS            0x20000
/* Suite B 128 bit mode allowing 192 bit algorithms */
# define SSL_CERT_FLAG_SUITEB_128_LOS            0x30000

/* Perform all sorts of protocol violations for testing purposes */
# define SSL_CERT_FLAG_BROKEN_PROTOCOL           0x10000000

/* Flags for building certificate chains */
/* Treat any existing certificates as untrusted CAs */
# define SSL_BUILD_CHAIN_FLAG_UNTRUSTED          0x1
/* Don't include root CA in chain */
# define SSL_BUILD_CHAIN_FLAG_NO_ROOT            0x2
/* Just check certificates already there */
# define SSL_BUILD_CHAIN_FLAG_CHECK              0x4
/* Ignore verification errors */
# define SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR       0x8
/* Clear verification errors from queue */
# define SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR        0x10

/* Flags returned by SSL_check_chain */
/* Certificate can be used with this session */
# define CERT_PKEY_VALID         0x1
/* Certificate can also be used for signing */
# define CERT_PKEY_SIGN          0x2
/* EE certificate signing algorithm OK */
# define CERT_PKEY_EE_SIGNATURE  0x10
/* CA signature algorithms OK */
# define CERT_PKEY_CA_SIGNATURE  0x20
/* EE certificate parameters OK */
# define CERT_PKEY_EE_PARAM      0x40
/* CA certificate parameters OK */
# define CERT_PKEY_CA_PARAM      0x80
/* Signing explicitly allowed as opposed to SHA1 fallback */
# define CERT_PKEY_EXPLICIT_SIGN 0x100
/* Client CA issuer names match (always set for server cert) */
# define CERT_PKEY_ISSUER_NAME   0x200
/* Cert type matches client types (always set for server cert) */
# define CERT_PKEY_CERT_TYPE     0x400
/* Cert chain suitable to Suite B */
# define CERT_PKEY_SUITEB        0x800

# define SSL_CONF_FLAG_CMDLINE           0x1
# define SSL_CONF_FLAG_FILE              0x2
# define SSL_CONF_FLAG_CLIENT            0x4
# define SSL_CONF_FLAG_SERVER            0x8
# define SSL_CONF_FLAG_SHOW_ERRORS       0x10
# define SSL_CONF_FLAG_CERTIFICATE       0x20
/* Configuration value types */
# define SSL_CONF_TYPE_UNKNOWN           0x0
# define SSL_CONF_TYPE_STRING            0x1
# define SSL_CONF_TYPE_FILE              0x2
# define SSL_CONF_TYPE_DIR               0x3

/*
 * Note: SSL[_CTX]_set_{options,mode} use |= op on the previous value, they
 * cannot be used to clear bits.
 */

# define SSL_CTX_set_options(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_OPTIONS,(op),NULL)
# define SSL_CTX_clear_options(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_CLEAR_OPTIONS,(op),NULL)
# define SSL_CTX_get_options(ctx) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_OPTIONS,0,NULL)
# define SSL_set_options(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_OPTIONS,(op),NULL)
# define SSL_clear_options(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_CLEAR_OPTIONS,(op),NULL)
# define SSL_get_options(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_OPTIONS,0,NULL)

# define SSL_CTX_set_mode(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_MODE,(op),NULL)
# define SSL_CTX_clear_mode(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_CLEAR_MODE,(op),NULL)
# define SSL_CTX_get_mode(ctx) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_MODE,0,NULL)
# define SSL_clear_mode(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_CLEAR_MODE,(op),NULL)
# define SSL_set_mode(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_MODE,(op),NULL)
# define SSL_get_mode(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_MODE,0,NULL)
# define SSL_set_mtu(ssl, mtu) \
        SSL_ctrl((ssl),SSL_CTRL_SET_MTU,(mtu),NULL)
# define DTLS_set_link_mtu(ssl, mtu) \
        SSL_ctrl((ssl),DTLS_CTRL_SET_LINK_MTU,(mtu),NULL)
# define DTLS_get_link_min_mtu(ssl) \
        SSL_ctrl((ssl),DTLS_CTRL_GET_LINK_MIN_MTU,0,NULL)

# define SSL_get_secure_renegotiation_support(ssl) \
        SSL_ctrl((ssl), SSL_CTRL_GET_RI_SUPPORT, 0, NULL)

# ifndef OPENSSL_NO_HEARTBEATS
#  define SSL_heartbeat(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_TLS_EXT_SEND_HEARTBEAT,0,NULL)
# endif

# define SSL_CTX_set_cert_flags(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_CERT_FLAGS,(op),NULL)
# define SSL_set_cert_flags(s,op) \
        SSL_ctrl((s),SSL_CTRL_CERT_FLAGS,(op),NULL)
# define SSL_CTX_clear_cert_flags(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_CLEAR_CERT_FLAGS,(op),NULL)
# define SSL_clear_cert_flags(s,op) \
        SSL_ctrl((s),SSL_CTRL_CLEAR_CERT_FLAGS,(op),NULL)

void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
                              void (*cb) (int write_p, int version,
                                          int content_type, const void *buf,
                                          size_t len, SSL *ssl, void *arg));
void SSL_set_msg_callback(SSL *ssl,
                          void (*cb) (int write_p, int version,
                                      int content_type, const void *buf,
                                      size_t len, SSL *ssl, void *arg));
# define SSL_CTX_set_msg_callback_arg(ctx, arg) SSL_CTX_ctrl((ctx), SSL_CTRL_SET_MSG_CALLBACK_ARG, 0, (arg))
# define SSL_set_msg_callback_arg(ssl, arg) SSL_ctrl((ssl), SSL_CTRL_SET_MSG_CALLBACK_ARG, 0, (arg))

# ifndef OPENSSL_NO_SRP

#  ifndef OPENSSL_NO_SSL_INTERN

typedef struct srp_ctx_st {
    /* param for all the callbacks */
    void *SRP_cb_arg;
    /* set client Hello login callback */
    int (*TLS_ext_srp_username_callback) (SSL *, int *, void *);
    /* set SRP N/g param callback for verification */
    int (*SRP_verify_param_callback) (SSL *, void *);
    /* set SRP client passwd callback */
    char *(*SRP_give_srp_client_pwd_callback) (SSL *, void *);
    char *login;
    BIGNUM *N, *g, *s, *B, *A;
    BIGNUM *a, *b, *v;
    char *info;
    int strength;
    unsigned long srp_Mask;
} SRP_CTX;

#  endif

/* see tls_srp.c */
int SSL_SRP_CTX_init(SSL *s);
int SSL_CTX_SRP_CTX_init(SSL_CTX *ctx);
int SSL_SRP_CTX_free(SSL *ctx);
int SSL_CTX_SRP_CTX_free(SSL_CTX *ctx);
int SSL_srp_server_param_with_username(SSL *s, int *ad);
int SRP_generate_server_master_secret(SSL *s, unsigned char *master_key);
int SRP_Calc_A_param(SSL *s);
int SRP_generate_client_master_secret(SSL *s, unsigned char *master_key);

# endif

# if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32)
#  define SSL_MAX_CERT_LIST_DEFAULT 1024*30
                                          /* 30k max cert list :-) */
# else
#  define SSL_MAX_CERT_LIST_DEFAULT 1024*100
                                           /* 100k max cert list :-) */
# endif

# define SSL_SESSION_CACHE_MAX_SIZE_DEFAULT      (1024*20)

/*
 * This callback type is used inside SSL_CTX, SSL, and in the functions that
 * set them. It is used to override the generation of SSL/TLS session IDs in
 * a server. Return value should be zero on an error, non-zero to proceed.
 * Also, callbacks should themselves check if the id they generate is unique
 * otherwise the SSL handshake will fail with an error - callbacks can do
 * this using the 'ssl' value they're passed by;
 * SSL_has_matching_session_id(ssl, id, *id_len) The length value passed in
 * is set at the maximum size the session ID can be. In SSLv3/TLSv1 it is 32
 * bytes. The callback can alter this length to be less if desired. It is
 * also an error for the callback to set the size to zero.
 */
typedef int (*GEN_SESSION_CB) (const SSL *ssl, unsigned char *id,
                               unsigned int *id_len);

typedef struct ssl_comp_st SSL_COMP;

# ifndef OPENSSL_NO_SSL_INTERN

struct ssl_comp_st {
    int id;
    const char *name;
#  ifndef OPENSSL_NO_COMP
    COMP_METHOD *method;
#  else
    char *method;
#  endif
};

DECLARE_STACK_OF(SSL_COMP)
DECLARE_LHASH_OF(SSL_SESSION);

struct ssl_ctx_st {
    const SSL_METHOD *method;
    STACK_OF(SSL_CIPHER) *cipher_list;
    /* same as above but sorted for lookup */
    STACK_OF(SSL_CIPHER) *cipher_list_by_id;
    struct x509_store_st /* X509_STORE */ *cert_store;
    LHASH_OF(SSL_SESSION) *sessions;
    /*
     * Most session-ids that will be cached, default is
     * SSL_SESSION_CACHE_MAX_SIZE_DEFAULT. 0 is unlimited.
     */
    unsigned long session_cache_size;
    struct ssl_session_st *session_cache_head;
    struct ssl_session_st *session_cache_tail;
    /*
     * This can have one of 2 values, ored together, SSL_SESS_CACHE_CLIENT,
     * SSL_SESS_CACHE_SERVER, Default is SSL_SESSION_CACHE_SERVER, which
     * means only SSL_accept which cache SSL_SESSIONS.
     */
    int session_cache_mode;
    /*
     * If timeout is not 0, it is the default timeout value set when
     * SSL_new() is called.  This has been put in to make life easier to set
     * things up
     */
    long session_timeout;
    /*
     * If this callback is not null, it will be called each time a session id
     * is added to the cache.  If this function returns 1, it means that the
     * callback will do a SSL_SESSION_free() when it has finished using it.
     * Otherwise, on 0, it means the callback has finished with it. If
     * remove_session_cb is not null, it will be called when a session-id is
     * removed from the cache.  After the call, OpenSSL will
     * SSL_SESSION_free() it.
     */
    int (*new_session_cb) (struct ssl_st *ssl, SSL_SESSION *sess);
    void (*remove_session_cb) (struct ssl_ctx_st *ctx, SSL_SESSION *sess);
    SSL_SESSION *(*get_session_cb) (struct ssl_st *ssl,
                                    unsigned char *data, int len, int *copy);
    struct {
        int sess_connect;       /* SSL new conn - started */
        int sess_connect_renegotiate; /* SSL reneg - requested */
        int sess_connect_good;  /* SSL new conne/reneg - finished */
        int sess_accept;        /* SSL new accept - started */
        int sess_accept_renegotiate; /* SSL reneg - requested */
        int sess_accept_good;   /* SSL accept/reneg - finished */
        int sess_miss;          /* session lookup misses */
        int sess_timeout;       /* reuse attempt on timeouted session */
        int sess_cache_full;    /* session removed due to full cache */
        int sess_hit;           /* session reuse actually done */
        int sess_cb_hit;        /* session-id that was not in the cache was
                                 * passed back via the callback.  This
                                 * indicates that the application is
                                 * supplying session-id's from other
                                 * processes - spooky :-) */
    } stats;

    int references;

    /* if defined, these override the X509_verify_cert() calls */
    int (*app_verify_callback) (X509_STORE_CTX *, void *);
    void *app_verify_arg;
    /*
     * before OpenSSL 0.9.7, 'app_verify_arg' was ignored
     * ('app_verify_callback' was called with just one argument)
     */

    /* Default password callback. */
    pem_password_cb *default_passwd_callback;

    /* Default password callback user data. */
    void *default_passwd_callback_userdata;

    /* get client cert callback */
    int (*client_cert_cb) (SSL *ssl, X509 **x509, EVP_PKEY **pkey);

    /* cookie generate callback */
    int (*app_gen_cookie_cb) (SSL *ssl, unsigned char *cookie,
                              unsigned int *cookie_len);

    /* verify cookie callback */
    int (*app_verify_cookie_cb) (SSL *ssl, unsigned char *cookie,
                                 unsigned int cookie_len);

    CRYPTO_EX_DATA ex_data;

    const EVP_MD *md5;          /* For SSLv3/TLSv1 'ssl3-md5' */
    const EVP_MD *sha1;         /* For SSLv3/TLSv1 'ssl3->sha1' */

    STACK_OF(X509) *extra_certs;
    STACK_OF(SSL_COMP) *comp_methods; /* stack of SSL_COMP, SSLv3/TLSv1 */

    /* Default values used when no per-SSL value is defined follow */

    /* used if SSL's info_callback is NULL */
    void (*info_callback) (const SSL *ssl, int type, int val);

    /* what we put in client cert requests */
    STACK_OF(X509_NAME) *client_CA;

    /*
     * Default values to use in SSL structures follow (these are copied by
     * SSL_new)
     */

    unsigned long options;
    unsigned long mode;
    long max_cert_list;

    struct cert_st /* CERT */ *cert;
    int read_ahead;

    /* callback that allows applications to peek at protocol messages */
    void (*msg_callback) (int write_p, int version, int content_type,
                          const void *buf, size_t len, SSL *ssl, void *arg);
    void *msg_callback_arg;

    int verify_mode;
    unsigned int sid_ctx_length;
    unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
    /* called 'verify_callback' in the SSL */
    int (*default_verify_callback) (int ok, X509_STORE_CTX *ctx);

    /* Default generate session ID callback. */
    GEN_SESSION_CB generate_session_id;

    X509_VERIFY_PARAM *param;

    int quiet_shutdown;

    /*
     * Maximum amount of data to send in one fragment. actual record size can
     * be more than this due to padding and MAC overheads.
     */
    unsigned int max_send_fragment;

#  ifndef OPENSSL_NO_ENGINE
    /*
     * Engine to pass requests for client certs to
     */
    ENGINE *client_cert_engine;
#  endif

#  ifndef OPENSSL_NO_TLSEXT
    /* TLS extensions servername callback */
    int (*tlsext_servername_callback) (SSL *, int *, void *);
    void *tlsext_servername_arg;
    /* RFC 4507 session ticket keys */
    unsigned char tlsext_tick_key_name[16];
    unsigned char tlsext_tick_hmac_key[16];
    unsigned char tlsext_tick_aes_key[16];
    /* Callback to support customisation of ticket key setting */
    int (*tlsext_ticket_key_cb) (SSL *ssl,
                                 unsigned char *name, unsigned char *iv,
                                 EVP_CIPHER_CTX *ectx,
                                 HMAC_CTX *hctx, int enc);

    /* certificate status request info */
    /* Callback for status request */
    int (*tlsext_status_cb) (SSL *ssl, void *arg);
    void *tlsext_status_arg;

    /* draft-rescorla-tls-opaque-prf-input-00.txt information */
    int (*tlsext_opaque_prf_input_callback) (SSL *, void *peerinput,
                                             size_t len, void *arg);
    void *tlsext_opaque_prf_input_callback_arg;
#  endif

#  ifndef OPENSSL_NO_PSK
    char *psk_identity_hint;
    unsigned int (*psk_client_callback) (SSL *ssl, const char *hint,
                                         char *identity,
                                         unsigned int max_identity_len,
                                         unsigned char *psk,
                                         unsigned int max_psk_len);
    unsigned int (*psk_server_callback) (SSL *ssl, const char *identity,
                                         unsigned char *psk,
                                         unsigned int max_psk_len);
#  endif

#  ifndef OPENSSL_NO_SRP
    SRP_CTX srp_ctx;            /* ctx for SRP authentication */
#  endif

#  ifndef OPENSSL_NO_TLSEXT

#   ifndef OPENSSL_NO_NEXTPROTONEG
    /* Next protocol negotiation information */
    /* (for experimental NPN extension). */

    /*
     * For a server, this contains a callback function by which the set of
     * advertised protocols can be provided.
     */
    int (*next_protos_advertised_cb) (SSL *s, const unsigned char **buf,
                                      unsigned int *len, void *arg);
    void *next_protos_advertised_cb_arg;
    /*
     * For a client, this contains a callback function that selects the next
     * protocol from the list provided by the server.
     */
    int (*next_proto_select_cb) (SSL *s, unsigned char **out,
                                 unsigned char *outlen,
                                 const unsigned char *in,
                                 unsigned int inlen, void *arg);
    void *next_proto_select_cb_arg;
#   endif

    /*
     * ALPN information (we are in the process of transitioning from NPN to
     * ALPN.)
     */

        /*-
         * For a server, this contains a callback function that allows the
         * server to select the protocol for the connection.
         *   out: on successful return, this must point to the raw protocol
         *        name (without the length prefix).
         *   outlen: on successful return, this contains the length of |*out|.
         *   in: points to the client's list of supported protocols in
         *       wire-format.
         *   inlen: the length of |in|.
         */
    int (*alpn_select_cb) (SSL *s,
                           const unsigned char **out,
                           unsigned char *outlen,
                           const unsigned char *in,
                           unsigned int inlen, void *arg);
    void *alpn_select_cb_arg;

    /*
     * For a client, this contains the list of supported protocols in wire
     * format.
     */
    unsigned char *alpn_client_proto_list;
    unsigned alpn_client_proto_list_len;

    /* SRTP profiles we are willing to do from RFC 5764 */
    STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
#  endif
    /*
     * Callback for disabling session caching and ticket support on a session
     * basis, depending on the chosen cipher.
     */
    int (*not_resumable_session_cb) (SSL *ssl, int is_forward_secure);
#  ifndef OPENSSL_NO_EC
    /* EC extension values inherited by SSL structure */
    size_t tlsext_ecpointformatlist_length;
    unsigned char *tlsext_ecpointformatlist;
    size_t tlsext_ellipticcurvelist_length;
    unsigned char *tlsext_ellipticcurvelist;
#  endif                        /* OPENSSL_NO_EC */
};

# endif

# define SSL_SESS_CACHE_OFF                      0x0000
# define SSL_SESS_CACHE_CLIENT                   0x0001
# define SSL_SESS_CACHE_SERVER                   0x0002
# define SSL_SESS_CACHE_BOTH     (SSL_SESS_CACHE_CLIENT|SSL_SESS_CACHE_SERVER)
# define SSL_SESS_CACHE_NO_AUTO_CLEAR            0x0080
/* enough comments already ... see SSL_CTX_set_session_cache_mode(3) */
# define SSL_SESS_CACHE_NO_INTERNAL_LOOKUP       0x0100
# define SSL_SESS_CACHE_NO_INTERNAL_STORE        0x0200
# define SSL_SESS_CACHE_NO_INTERNAL \
        (SSL_SESS_CACHE_NO_INTERNAL_LOOKUP|SSL_SESS_CACHE_NO_INTERNAL_STORE)

LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx);
# define SSL_CTX_sess_number(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_NUMBER,0,NULL)
# define SSL_CTX_sess_connect(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT,0,NULL)
# define SSL_CTX_sess_connect_good(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT_GOOD,0,NULL)
# define SSL_CTX_sess_connect_renegotiate(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT_RENEGOTIATE,0,NULL)
# define SSL_CTX_sess_accept(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT,0,NULL)
# define SSL_CTX_sess_accept_renegotiate(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT_RENEGOTIATE,0,NULL)
# define SSL_CTX_sess_accept_good(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT_GOOD,0,NULL)
# define SSL_CTX_sess_hits(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_HIT,0,NULL)
# define SSL_CTX_sess_cb_hits(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CB_HIT,0,NULL)
# define SSL_CTX_sess_misses(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_MISSES,0,NULL)
# define SSL_CTX_sess_timeouts(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_TIMEOUTS,0,NULL)
# define SSL_CTX_sess_cache_full(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CACHE_FULL,0,NULL)

void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
                             int (*new_session_cb) (struct ssl_st *ssl,
                                                    SSL_SESSION *sess));
int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (struct ssl_st *ssl,
                                              SSL_SESSION *sess);
void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
                                void (*remove_session_cb) (struct ssl_ctx_st
                                                           *ctx,
                                                           SSL_SESSION
                                                           *sess));
void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (struct ssl_ctx_st *ctx,
                                                  SSL_SESSION *sess);
void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
                             SSL_SESSION *(*get_session_cb) (struct ssl_st
                                                             *ssl,
                                                             unsigned char
                                                             *data, int len,
                                                             int *copy));
SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (struct ssl_st *ssl,
                                                       unsigned char *Data,
                                                       int len, int *copy);
void SSL_CTX_set_info_callback(SSL_CTX *ctx,
                               void (*cb) (const SSL *ssl, int type,
                                           int val));
void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type,
                                                 int val);
void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
                                int (*client_cert_cb) (SSL *ssl, X509 **x509,
                                                       EVP_PKEY **pkey));
int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509,
                                                 EVP_PKEY **pkey);
# ifndef OPENSSL_NO_ENGINE
int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e);
# endif
void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
                                    int (*app_gen_cookie_cb) (SSL *ssl,
                                                              unsigned char
                                                              *cookie,
                                                              unsigned int
                                                              *cookie_len));
void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
                                  int (*app_verify_cookie_cb) (SSL *ssl,
                                                               unsigned char
                                                               *cookie,
                                                               unsigned int
                                                               cookie_len));
# ifndef OPENSSL_NO_NEXTPROTONEG
void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *s,
                                           int (*cb) (SSL *ssl,
                                                      const unsigned char
                                                      **out,
                                                      unsigned int *outlen,
                                                      void *arg), void *arg);
void SSL_CTX_set_next_proto_select_cb(SSL_CTX *s,
                                      int (*cb) (SSL *ssl,
                                                 unsigned char **out,
                                                 unsigned char *outlen,
                                                 const unsigned char *in,
                                                 unsigned int inlen,
                                                 void *arg), void *arg);
void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
                                    unsigned *len);
# endif

# ifndef OPENSSL_NO_TLSEXT
int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
                          const unsigned char *in, unsigned int inlen,
                          const unsigned char *client,
                          unsigned int client_len);
# endif

# define OPENSSL_NPN_UNSUPPORTED 0
# define OPENSSL_NPN_NEGOTIATED  1
# define OPENSSL_NPN_NO_OVERLAP  2

int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
                            unsigned protos_len);
int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
                        unsigned protos_len);
void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
                                int (*cb) (SSL *ssl,
                                           const unsigned char **out,
                                           unsigned char *outlen,
                                           const unsigned char *in,
                                           unsigned int inlen,
                                           void *arg), void *arg);
void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
                            unsigned *len);

# ifndef OPENSSL_NO_PSK
/*
 * the maximum length of the buffer given to callbacks containing the
 * resulting identity/psk
 */
#  define PSK_MAX_IDENTITY_LEN 128
#  define PSK_MAX_PSK_LEN 256
void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
                                     unsigned int (*psk_client_callback) (SSL
                                                                          *ssl,
                                                                          const
                                                                          char
                                                                          *hint,
                                                                          char
                                                                          *identity,
                                                                          unsigned
                                                                          int
                                                                          max_identity_len,
                                                                          unsigned
                                                                          char
                                                                          *psk,
                                                                          unsigned
                                                                          int
                                                                          max_psk_len));
void SSL_set_psk_client_callback(SSL *ssl,
                                 unsigned int (*psk_client_callback) (SSL
                                                                      *ssl,
                                                                      const
                                                                      char
                                                                      *hint,
                                                                      char
                                                                      *identity,
                                                                      unsigned
                                                                      int
                                                                      max_identity_len,
                                                                      unsigned
                                                                      char
                                                                      *psk,
                                                                      unsigned
                                                                      int
                                                                      max_psk_len));
void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
                                     unsigned int (*psk_server_callback) (SSL
                                                                          *ssl,
                                                                          const
                                                                          char
                                                                          *identity,
                                                                          unsigned
                                                                          char
                                                                          *psk,
                                                                          unsigned
                                                                          int
                                                                          max_psk_len));
void SSL_set_psk_server_callback(SSL *ssl,
                                 unsigned int (*psk_server_callback) (SSL
                                                                      *ssl,
                                                                      const
                                                                      char
                                                                      *identity,
                                                                      unsigned
                                                                      char
                                                                      *psk,
                                                                      unsigned
                                                                      int
                                                                      max_psk_len));
int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint);
int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint);
const char *SSL_get_psk_identity_hint(const SSL *s);
const char *SSL_get_psk_identity(const SSL *s);
# endif

# ifndef OPENSSL_NO_TLSEXT
/* Register callbacks to handle custom TLS Extensions for client or server. */

int SSL_CTX_add_client_custom_ext(SSL_CTX *ctx, unsigned int ext_type,
                                  custom_ext_add_cb add_cb,
                                  custom_ext_free_cb free_cb,
                                  void *add_arg,
                                  custom_ext_parse_cb parse_cb,
                                  void *parse_arg);

int SSL_CTX_add_server_custom_ext(SSL_CTX *ctx, unsigned int ext_type,
                                  custom_ext_add_cb add_cb,
                                  custom_ext_free_cb free_cb,
                                  void *add_arg,
                                  custom_ext_parse_cb parse_cb,
                                  void *parse_arg);

int SSL_extension_supported(unsigned int ext_type);

# endif

# define SSL_NOTHING     1
# define SSL_WRITING     2
# define SSL_READING     3
# define SSL_X509_LOOKUP 4

/* These will only be used when doing non-blocking IO */
# define SSL_want_nothing(s)     (SSL_want(s) == SSL_NOTHING)
# define SSL_want_read(s)        (SSL_want(s) == SSL_READING)
# define SSL_want_write(s)       (SSL_want(s) == SSL_WRITING)
# define SSL_want_x509_lookup(s) (SSL_want(s) == SSL_X509_LOOKUP)

# define SSL_MAC_FLAG_READ_MAC_STREAM 1
# define SSL_MAC_FLAG_WRITE_MAC_STREAM 2

# ifndef OPENSSL_NO_SSL_INTERN

struct ssl_st {
    /*
     * protocol version (one of SSL2_VERSION, SSL3_VERSION, TLS1_VERSION,
     * DTLS1_VERSION)
     */
    int version;
    /* SSL_ST_CONNECT or SSL_ST_ACCEPT */
    int type;
    /* SSLv3 */
    const SSL_METHOD *method;
    /*
     * There are 2 BIO's even though they are normally both the same.  This
     * is so data can be read and written to different handlers
     */
    /* used by SSL_read */
    BIO *rbio;
    /* used by SSL_write */
    BIO *wbio;
    /* used during session-id reuse to concatenate messages */
    BIO *bbio;
    /*
     * This holds a variable that indicates what we were doing when a 0 or -1
     * is returned.  This is needed for non-blocking IO so we know what
     * request needs re-doing when in SSL_accept or SSL_connect
     */
    int rwstate;
    /* true when we are actually in SSL_accept() or SSL_connect() */
    int in_handshake;
    int (*handshake_func) (SSL *);
    /*
     * Imagine that here's a boolean member "init" that is switched as soon
     * as SSL_set_{accept/connect}_state is called for the first time, so
     * that "state" and "handshake_func" are properly initialized.  But as
     * handshake_func is == 0 until then, we use this test instead of an
     * "init" member.
     */
    /* are we the server side? - mostly used by SSL_clear */
    int server;
    /*
     * Generate a new session or reuse an old one.
     * NB: For servers, the 'new' session may actually be a previously
     * cached session or even the previous session unless
     * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set
     */
    int new_session;
    /* don't send shutdown packets */
    int quiet_shutdown;
    /* we have shut things down, 0x01 sent, 0x02 for received */
    int shutdown;
    /* where we are */
    int state;
    /* where we are when reading */
    int rstate;
    BUF_MEM *init_buf;          /* buffer used during init */
    void *init_msg;             /* pointer to handshake message body, set by
                                 * ssl3_get_message() */
    int init_num;               /* amount read/written */
    int init_off;               /* amount read/written */
    /* used internally to point at a raw packet */
    unsigned char *packet;
    unsigned int packet_length;
    struct ssl3_state_st *s3;   /* SSLv3 variables */
    struct dtls1_state_st *d1;  /* DTLSv1 variables */
    int read_ahead;             /* Read as many input bytes as possible (for
                                 * non-blocking reads) */
    /* callback that allows applications to peek at protocol messages */
    void (*msg_callback) (int write_p, int version, int content_type,
                          const void *buf, size_t len, SSL *ssl, void *arg);
    void *msg_callback_arg;
    int hit;                    /* reusing a previous session */
    X509_VERIFY_PARAM *param;
    /* crypto */
    STACK_OF(SSL_CIPHER) *cipher_list;
    STACK_OF(SSL_CIPHER) *cipher_list_by_id;
    /*
     * These are the ones being used, the ones in SSL_SESSION are the ones to
     * be 'copied' into these ones
     */
    int mac_flags;
    EVP_CIPHER_CTX *enc_read_ctx; /* cryptographic state */
    EVP_MD_CTX *read_hash;      /* used for mac generation */
#  ifndef OPENSSL_NO_COMP
    COMP_CTX *expand;           /* uncompress */
#  else
    char *expand;
#  endif
    EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
    EVP_MD_CTX *write_hash;     /* used for mac generation */
#  ifndef OPENSSL_NO_COMP
    COMP_CTX *compress;         /* compression */
#  else
    char *compress;
#  endif
    /* session info */
    /* client cert? */
    /* This is used to hold the server certificate used */
    struct cert_st /* CERT */ *cert;
    /*
     * the session_id_context is used to ensure sessions are only reused in
     * the appropriate context
     */
    unsigned int sid_ctx_length;
    unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
    /* This can also be in the session once a session is established */
    SSL_SESSION *session;
    /* Default generate session ID callback. */
    GEN_SESSION_CB generate_session_id;
    /* Used in SSL3 */
    /*
     * 0 don't care about verify failure.
     * 1 fail if verify fails
     */
    int verify_mode;
    /* fail if callback returns 0 */
    int (*verify_callback) (int ok, X509_STORE_CTX *ctx);
    /* optional informational callback */
    void (*info_callback) (const SSL *ssl, int type, int val);
    /* error bytes to be written */
    int error;
    /* actual code */
    int error_code;
#  ifndef OPENSSL_NO_KRB5
    /* Kerberos 5 context */
    KSSL_CTX *kssl_ctx;
#  endif                        /* OPENSSL_NO_KRB5 */
#  ifndef OPENSSL_NO_PSK
    unsigned int (*psk_client_callback) (SSL *ssl, const char *hint,
                                         char *identity,
                                         unsigned int max_identity_len,
                                         unsigned char *psk,
                                         unsigned int max_psk_len);
    unsigned int (*psk_server_callback) (SSL *ssl, const char *identity,
                                         unsigned char *psk,
                                         unsigned int max_psk_len);
#  endif
    SSL_CTX *ctx;
    /*
     * set this flag to 1 and a sleep(1) is put into all SSL_read() and
     * SSL_write() calls, good for nbio debuging :-)
     */
    int debug;
    /* extra application data */
    long verify_result;
    CRYPTO_EX_DATA ex_data;
    /* for server side, keep the list of CA_dn we can use */
    STACK_OF(X509_NAME) *client_CA;
    int references;
    /* protocol behaviour */
    unsigned long options;
    /* API behaviour */
    unsigned long mode;
    long max_cert_list;
    int first_packet;
    /* what was passed, used for SSLv3/TLS rollback check */
    int client_version;
    unsigned int max_send_fragment;
#  ifndef OPENSSL_NO_TLSEXT
    /* TLS extension debug callback */
    void (*tlsext_debug_cb) (SSL *s, int client_server, int type,
                             unsigned char *data, int len, void *arg);
    void *tlsext_debug_arg;
    char *tlsext_hostname;
    /*-
     * no further mod of servername
     * 0 : call the servername extension callback.
     * 1 : prepare 2, allow last ack just after in server callback.
     * 2 : don't call servername callback, no ack in server hello
     */
    int servername_done;
    /* certificate status request info */
    /* Status type or -1 if no status type */
    int tlsext_status_type;
    /* Expect OCSP CertificateStatus message */
    int tlsext_status_expected;
    /* OCSP status request only */
    STACK_OF(OCSP_RESPID) *tlsext_ocsp_ids;
    X509_EXTENSIONS *tlsext_ocsp_exts;
    /* OCSP response received or to be sent */
    unsigned char *tlsext_ocsp_resp;
    int tlsext_ocsp_resplen;
    /* RFC4507 session ticket expected to be received or sent */
    int tlsext_ticket_expected;
#   ifndef OPENSSL_NO_EC
    size_t tlsext_ecpointformatlist_length;
    /* our list */
    unsigned char *tlsext_ecpointformatlist;
    size_t tlsext_ellipticcurvelist_length;
    /* our list */
    unsigned char *tlsext_ellipticcurvelist;
#   endif                       /* OPENSSL_NO_EC */
    /*
     * draft-rescorla-tls-opaque-prf-input-00.txt information to be used for
     * handshakes
     */
    void *tlsext_opaque_prf_input;
    size_t tlsext_opaque_prf_input_len;
    /* TLS Session Ticket extension override */
    TLS_SESSION_TICKET_EXT *tlsext_session_ticket;
    /* TLS Session Ticket extension callback */
    tls_session_ticket_ext_cb_fn tls_session_ticket_ext_cb;
    void *tls_session_ticket_ext_cb_arg;
    /* TLS pre-shared secret session resumption */
    tls_session_secret_cb_fn tls_session_secret_cb;
    void *tls_session_secret_cb_arg;
    SSL_CTX *initial_ctx;       /* initial ctx, used to store sessions */
#   ifndef OPENSSL_NO_NEXTPROTONEG
    /*
     * Next protocol negotiation. For the client, this is the protocol that
     * we sent in NextProtocol and is set when handling ServerHello
     * extensions. For a server, this is the client's selected_protocol from
     * NextProtocol and is set when handling the NextProtocol message, before
     * the Finished message.
     */
    unsigned char *next_proto_negotiated;
    unsigned char next_proto_negotiated_len;
#   endif
#   define session_ctx initial_ctx
    /* What we'll do */
    STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;
    /* What's been chosen */
    SRTP_PROTECTION_PROFILE *srtp_profile;
        /*-
         * Is use of the Heartbeat extension negotiated?
         *  0: disabled
         *  1: enabled
         *  2: enabled, but not allowed to send Requests
         */
    unsigned int tlsext_heartbeat;
    /* Indicates if a HeartbeatRequest is in flight */
    unsigned int tlsext_hb_pending;
    /* HeartbeatRequest sequence number */
    unsigned int tlsext_hb_seq;
    /*
     * For a client, this contains the list of supported protocols in wire
     * format.
     */
    unsigned char *alpn_client_proto_list;
    unsigned alpn_client_proto_list_len;
#  else
#   define session_ctx ctx
#  endif                        /* OPENSSL_NO_TLSEXT */
    /*-
     * 1 if we are renegotiating.
     * 2 if we are a server and are inside a handshake
     * (i.e. not just sending a HelloRequest)
     */
    int renegotiate;
#  ifndef OPENSSL_NO_SRP
    /* ctx for SRP authentication */
    SRP_CTX srp_ctx;
#  endif
    /*
     * Callback for disabling session caching and ticket support on a session
     * basis, depending on the chosen cipher.
     */
    int (*not_resumable_session_cb) (SSL *ssl, int is_forward_secure);
};

# endif

#ifdef __cplusplus
}
#endif

# include <openssl/ssl2.h>
# include <openssl/ssl3.h>
# include <openssl/tls1.h>      /* This is mostly sslv3 with a few tweaks */
# include <openssl/dtls1.h>     /* Datagram TLS */
# include <openssl/ssl23.h>
# include <openssl/srtp.h>      /* Support for the use_srtp extension */

#ifdef  __cplusplus
extern "C" {
#endif

/* compatibility */
# define SSL_set_app_data(s,arg)         (SSL_set_ex_data(s,0,(char *)arg))
# define SSL_get_app_data(s)             (SSL_get_ex_data(s,0))
# define SSL_SESSION_set_app_data(s,a)   (SSL_SESSION_set_ex_data(s,0,(char *)a))
# define SSL_SESSION_get_app_data(s)     (SSL_SESSION_get_ex_data(s,0))
# define SSL_CTX_get_app_data(ctx)       (SSL_CTX_get_ex_data(ctx,0))
# define SSL_CTX_set_app_data(ctx,arg)   (SSL_CTX_set_ex_data(ctx,0,(char *)arg))

/*
 * The following are the possible values for ssl->state are are used to
 * indicate where we are up to in the SSL connection establishment. The
 * macros that follow are about the only things you should need to use and
 * even then, only when using non-blocking IO. It can also be useful to work
 * out where you were when the connection failed
 */

# define SSL_ST_CONNECT                  0x1000
# define SSL_ST_ACCEPT                   0x2000
# define SSL_ST_MASK                     0x0FFF
# define SSL_ST_INIT                     (SSL_ST_CONNECT|SSL_ST_ACCEPT)
# define SSL_ST_BEFORE                   0x4000
# define SSL_ST_OK                       0x03
# define SSL_ST_RENEGOTIATE              (0x04|SSL_ST_INIT)

# define SSL_CB_LOOP                     0x01
# define SSL_CB_EXIT                     0x02
# define SSL_CB_READ                     0x04
# define SSL_CB_WRITE                    0x08
# define SSL_CB_ALERT                    0x4000/* used in callback */
# define SSL_CB_READ_ALERT               (SSL_CB_ALERT|SSL_CB_READ)
# define SSL_CB_WRITE_ALERT              (SSL_CB_ALERT|SSL_CB_WRITE)
# define SSL_CB_ACCEPT_LOOP              (SSL_ST_ACCEPT|SSL_CB_LOOP)
# define SSL_CB_ACCEPT_EXIT              (SSL_ST_ACCEPT|SSL_CB_EXIT)
# define SSL_CB_CONNECT_LOOP             (SSL_ST_CONNECT|SSL_CB_LOOP)
# define SSL_CB_CONNECT_EXIT             (SSL_ST_CONNECT|SSL_CB_EXIT)
# define SSL_CB_HANDSHAKE_START          0x10
# define SSL_CB_HANDSHAKE_DONE           0x20

/* Is the SSL_connection established? */
# define SSL_get_state(a)                SSL_state(a)
# define SSL_is_init_finished(a)         (SSL_state(a) == SSL_ST_OK)
# define SSL_in_init(a)                  (SSL_state(a)&SSL_ST_INIT)
# define SSL_in_before(a)                (SSL_state(a)&SSL_ST_BEFORE)
# define SSL_in_connect_init(a)          (SSL_state(a)&SSL_ST_CONNECT)
# define SSL_in_accept_init(a)           (SSL_state(a)&SSL_ST_ACCEPT)

/*
 * The following 2 states are kept in ssl->rstate when reads fail, you should
 * not need these
 */
# define SSL_ST_READ_HEADER                      0xF0
# define SSL_ST_READ_BODY                        0xF1
# define SSL_ST_READ_DONE                        0xF2

/*-
 * Obtain latest Finished message
 *   -- that we sent (SSL_get_finished)
 *   -- that we expected from peer (SSL_get_peer_finished).
 * Returns length (0 == no Finished so far), copies up to 'count' bytes.
 */
size_t SSL_get_finished(const SSL *s, void *buf, size_t count);
size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count);

/*
 * use either SSL_VERIFY_NONE or SSL_VERIFY_PEER, the last 2 options are
 * 'ored' with SSL_VERIFY_PEER if they are desired
 */
# define SSL_VERIFY_NONE                 0x00
# define SSL_VERIFY_PEER                 0x01
# define SSL_VERIFY_FAIL_IF_NO_PEER_CERT 0x02
# define SSL_VERIFY_CLIENT_ONCE          0x04

# define OpenSSL_add_ssl_algorithms()    SSL_library_init()
# define SSLeay_add_ssl_algorithms()     SSL_library_init()

/* More backward compatibility */
# define SSL_get_cipher(s) \
                SSL_CIPHER_get_name(SSL_get_current_cipher(s))
# define SSL_get_cipher_bits(s,np) \
                SSL_CIPHER_get_bits(SSL_get_current_cipher(s),np)
# define SSL_get_cipher_version(s) \
                SSL_CIPHER_get_version(SSL_get_current_cipher(s))
# define SSL_get_cipher_name(s) \
                SSL_CIPHER_get_name(SSL_get_current_cipher(s))
# define SSL_get_time(a)         SSL_SESSION_get_time(a)
# define SSL_set_time(a,b)       SSL_SESSION_set_time((a),(b))
# define SSL_get_timeout(a)      SSL_SESSION_get_timeout(a)
# define SSL_set_timeout(a,b)    SSL_SESSION_set_timeout((a),(b))

# define d2i_SSL_SESSION_bio(bp,s_id) ASN1_d2i_bio_of(SSL_SESSION,SSL_SESSION_new,d2i_SSL_SESSION,bp,s_id)
# define i2d_SSL_SESSION_bio(bp,s_id) ASN1_i2d_bio_of(SSL_SESSION,i2d_SSL_SESSION,bp,s_id)

DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
# define SSL_AD_REASON_OFFSET            1000/* offset to get SSL_R_... value
                                              * from SSL_AD_... */
/* These alert types are for SSLv3 and TLSv1 */
# define SSL_AD_CLOSE_NOTIFY             SSL3_AD_CLOSE_NOTIFY
/* fatal */
# define SSL_AD_UNEXPECTED_MESSAGE       SSL3_AD_UNEXPECTED_MESSAGE
/* fatal */
# define SSL_AD_BAD_RECORD_MAC           SSL3_AD_BAD_RECORD_MAC
# define SSL_AD_DECRYPTION_FAILED        TLS1_AD_DECRYPTION_FAILED
# define SSL_AD_RECORD_OVERFLOW          TLS1_AD_RECORD_OVERFLOW
/* fatal */
# define SSL_AD_DECOMPRESSION_FAILURE    SSL3_AD_DECOMPRESSION_FAILURE
/* fatal */
# define SSL_AD_HANDSHAKE_FAILURE        SSL3_AD_HANDSHAKE_FAILURE
/* Not for TLS */
# define SSL_AD_NO_CERTIFICATE           SSL3_AD_NO_CERTIFICATE
# define SSL_AD_BAD_CERTIFICATE          SSL3_AD_BAD_CERTIFICATE
# define SSL_AD_UNSUPPORTED_CERTIFICATE  SSL3_AD_UNSUPPORTED_CERTIFICATE
# define SSL_AD_CERTIFICATE_REVOKED      SSL3_AD_CERTIFICATE_REVOKED
# define SSL_AD_CERTIFICATE_EXPIRED      SSL3_AD_CERTIFICATE_EXPIRED
# define SSL_AD_CERTIFICATE_UNKNOWN      SSL3_AD_CERTIFICATE_UNKNOWN
/* fatal */
# define SSL_AD_ILLEGAL_PARAMETER        SSL3_AD_ILLEGAL_PARAMETER
/* fatal */
# define SSL_AD_UNKNOWN_CA               TLS1_AD_UNKNOWN_CA
/* fatal */
# define SSL_AD_ACCESS_DENIED            TLS1_AD_ACCESS_DENIED
/* fatal */
# define SSL_AD_DECODE_ERROR             TLS1_AD_DECODE_ERROR
# define SSL_AD_DECRYPT_ERROR            TLS1_AD_DECRYPT_ERROR
/* fatal */
# define SSL_AD_EXPORT_RESTRICTION       TLS1_AD_EXPORT_RESTRICTION
/* fatal */
# define SSL_AD_PROTOCOL_VERSION         TLS1_AD_PROTOCOL_VERSION
/* fatal */
# define SSL_AD_INSUFFICIENT_SECURITY    TLS1_AD_INSUFFICIENT_SECURITY
/* fatal */
# define SSL_AD_INTERNAL_ERROR           TLS1_AD_INTERNAL_ERROR
# define SSL_AD_USER_CANCELLED           TLS1_AD_USER_CANCELLED
# define SSL_AD_NO_RENEGOTIATION         TLS1_AD_NO_RENEGOTIATION
# define SSL_AD_UNSUPPORTED_EXTENSION    TLS1_AD_UNSUPPORTED_EXTENSION
# define SSL_AD_CERTIFICATE_UNOBTAINABLE TLS1_AD_CERTIFICATE_UNOBTAINABLE
# define SSL_AD_UNRECOGNIZED_NAME        TLS1_AD_UNRECOGNIZED_NAME
# define SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
# define SSL_AD_BAD_CERTIFICATE_HASH_VALUE TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
/* fatal */
# define SSL_AD_UNKNOWN_PSK_IDENTITY     TLS1_AD_UNKNOWN_PSK_IDENTITY
/* fatal */
# define SSL_AD_INAPPROPRIATE_FALLBACK   TLS1_AD_INAPPROPRIATE_FALLBACK
# define SSL_ERROR_NONE                  0
# define SSL_ERROR_SSL                   1
# define SSL_ERROR_WANT_READ             2
# define SSL_ERROR_WANT_WRITE            3
# define SSL_ERROR_WANT_X509_LOOKUP      4
# define SSL_ERROR_SYSCALL               5/* look at error stack/return
                                           * value/errno */
# define SSL_ERROR_ZERO_RETURN           6
# define SSL_ERROR_WANT_CONNECT          7
# define SSL_ERROR_WANT_ACCEPT           8
# define SSL_CTRL_NEED_TMP_RSA                   1
# define SSL_CTRL_SET_TMP_RSA                    2
# define SSL_CTRL_SET_TMP_DH                     3
# define SSL_CTRL_SET_TMP_ECDH                   4
# define SSL_CTRL_SET_TMP_RSA_CB                 5
# define SSL_CTRL_SET_TMP_DH_CB                  6
# define SSL_CTRL_SET_TMP_ECDH_CB                7
# define SSL_CTRL_GET_SESSION_REUSED             8
# define SSL_CTRL_GET_CLIENT_CERT_REQUEST        9
# define SSL_CTRL_GET_NUM_RENEGOTIATIONS         10
# define SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS       11
# define SSL_CTRL_GET_TOTAL_RENEGOTIATIONS       12
# define SSL_CTRL_GET_FLAGS                      13
# define SSL_CTRL_EXTRA_CHAIN_CERT               14
# define SSL_CTRL_SET_MSG_CALLBACK               15
# define SSL_CTRL_SET_MSG_CALLBACK_ARG           16
/* only applies to datagram connections */
# define SSL_CTRL_SET_MTU                17
/* Stats */
# define SSL_CTRL_SESS_NUMBER                    20
# define SSL_CTRL_SESS_CONNECT                   21
# define SSL_CTRL_SESS_CONNECT_GOOD              22
# define SSL_CTRL_SESS_CONNECT_RENEGOTIATE       23
# define SSL_CTRL_SESS_ACCEPT                    24
# define SSL_CTRL_SESS_ACCEPT_GOOD               25
# define SSL_CTRL_SESS_ACCEPT_RENEGOTIATE        26
# define SSL_CTRL_SESS_HIT                       27
# define SSL_CTRL_SESS_CB_HIT                    28
# define SSL_CTRL_SESS_MISSES                    29
# define SSL_CTRL_SESS_TIMEOUTS                  30
# define SSL_CTRL_SESS_CACHE_FULL                31
# define SSL_CTRL_OPTIONS                        32
# define SSL_CTRL_MODE                           33
# define SSL_CTRL_GET_READ_AHEAD                 40
# define SSL_CTRL_SET_READ_AHEAD                 41
# define SSL_CTRL_SET_SESS_CACHE_SIZE            42
# define SSL_CTRL_GET_SESS_CACHE_SIZE            43
# define SSL_CTRL_SET_SESS_CACHE_MODE            44
# define SSL_CTRL_GET_SESS_CACHE_MODE            45
# define SSL_CTRL_GET_MAX_CERT_LIST              50
# define SSL_CTRL_SET_MAX_CERT_LIST              51
# define SSL_CTRL_SET_MAX_SEND_FRAGMENT          52
/* see tls1.h for macros based on these */
# ifndef OPENSSL_NO_TLSEXT
#  define SSL_CTRL_SET_TLSEXT_SERVERNAME_CB       53
#  define SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG      54
#  define SSL_CTRL_SET_TLSEXT_HOSTNAME            55
#  define SSL_CTRL_SET_TLSEXT_DEBUG_CB            56
#  define SSL_CTRL_SET_TLSEXT_DEBUG_ARG           57
#  define SSL_CTRL_GET_TLSEXT_TICKET_KEYS         58
#  define SSL_CTRL_SET_TLSEXT_TICKET_KEYS         59
#  define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT    60
#  define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB 61
#  define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB_ARG 62
#  define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB       63
#  define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB_ARG   64
#  define SSL_CTRL_SET_TLSEXT_STATUS_REQ_TYPE     65
#  define SSL_CTRL_GET_TLSEXT_STATUS_REQ_EXTS     66
#  define SSL_CTRL_SET_TLSEXT_STATUS_REQ_EXTS     67
#  define SSL_CTRL_GET_TLSEXT_STATUS_REQ_IDS      68
#  define SSL_CTRL_SET_TLSEXT_STATUS_REQ_IDS      69
#  define SSL_CTRL_GET_TLSEXT_STATUS_REQ_OCSP_RESP        70
#  define SSL_CTRL_SET_TLSEXT_STATUS_REQ_OCSP_RESP        71
#  define SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB       72
#  define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME_CB    75
#  define SSL_CTRL_SET_SRP_VERIFY_PARAM_CB                76
#  define SSL_CTRL_SET_SRP_GIVE_CLIENT_PWD_CB             77
#  define SSL_CTRL_SET_SRP_ARG            78
#  define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME               79
#  define SSL_CTRL_SET_TLS_EXT_SRP_STRENGTH               80
#  define SSL_CTRL_SET_TLS_EXT_SRP_PASSWORD               81
#  ifndef OPENSSL_NO_HEARTBEATS
#   define SSL_CTRL_TLS_EXT_SEND_HEARTBEAT                         85
#   define SSL_CTRL_GET_TLS_EXT_HEARTBEAT_PENDING          86
#   define SSL_CTRL_SET_TLS_EXT_HEARTBEAT_NO_REQUESTS      87
#  endif
# endif                         /* OPENSSL_NO_TLSEXT */
# define DTLS_CTRL_GET_TIMEOUT           73
# define DTLS_CTRL_HANDLE_TIMEOUT        74
# define DTLS_CTRL_LISTEN                        75
# define SSL_CTRL_GET_RI_SUPPORT                 76
# define SSL_CTRL_CLEAR_OPTIONS                  77
# define SSL_CTRL_CLEAR_MODE                     78
# define SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB      79
# define SSL_CTRL_GET_EXTRA_CHAIN_CERTS          82
# define SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS        83
# define SSL_CTRL_CHAIN                          88
# define SSL_CTRL_CHAIN_CERT                     89
# define SSL_CTRL_GET_CURVES                     90
# define SSL_CTRL_SET_CURVES                     91
# define SSL_CTRL_SET_CURVES_LIST                92
# define SSL_CTRL_GET_SHARED_CURVE               93
# define SSL_CTRL_SET_ECDH_AUTO                  94
# define SSL_CTRL_SET_SIGALGS                    97
# define SSL_CTRL_SET_SIGALGS_LIST               98
# define SSL_CTRL_CERT_FLAGS                     99
# define SSL_CTRL_CLEAR_CERT_FLAGS               100
# define SSL_CTRL_SET_CLIENT_SIGALGS             101
# define SSL_CTRL_SET_CLIENT_SIGALGS_LIST        102
# define SSL_CTRL_GET_CLIENT_CERT_TYPES          103
# define SSL_CTRL_SET_CLIENT_CERT_TYPES          104
# define SSL_CTRL_BUILD_CERT_CHAIN               105
# define SSL_CTRL_SET_VERIFY_CERT_STORE          106
# define SSL_CTRL_SET_CHAIN_CERT_STORE           107
# define SSL_CTRL_GET_PEER_SIGNATURE_NID         108
# define SSL_CTRL_GET_SERVER_TMP_KEY             109
# define SSL_CTRL_GET_RAW_CIPHERLIST             110
# define SSL_CTRL_GET_EC_POINT_FORMATS           111
# define SSL_CTRL_GET_CHAIN_CERTS                115
# define SSL_CTRL_SELECT_CURRENT_CERT            116
# define SSL_CTRL_SET_CURRENT_CERT               117
# define SSL_CTRL_SET_DH_AUTO                    118
# define SSL_CTRL_CHECK_PROTO_VERSION            119
# define DTLS_CTRL_SET_LINK_MTU                  120
# define DTLS_CTRL_GET_LINK_MIN_MTU              121
# define SSL_CERT_SET_FIRST                      1
# define SSL_CERT_SET_NEXT                       2
# define SSL_CERT_SET_SERVER                     3
# define DTLSv1_get_timeout(ssl, arg) \
        SSL_ctrl(ssl,DTLS_CTRL_GET_TIMEOUT,0, (void *)arg)
# define DTLSv1_handle_timeout(ssl) \
        SSL_ctrl(ssl,DTLS_CTRL_HANDLE_TIMEOUT,0, NULL)
# define DTLSv1_listen(ssl, peer) \
        SSL_ctrl(ssl,DTLS_CTRL_LISTEN,0, (void *)peer)
# define SSL_session_reused(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_GET_SESSION_REUSED,0,NULL)
# define SSL_num_renegotiations(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_GET_NUM_RENEGOTIATIONS,0,NULL)
# define SSL_clear_num_renegotiations(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS,0,NULL)
# define SSL_total_renegotiations(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_GET_TOTAL_RENEGOTIATIONS,0,NULL)
# define SSL_CTX_need_tmp_RSA(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_NEED_TMP_RSA,0,NULL)
# define SSL_CTX_set_tmp_rsa(ctx,rsa) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA,0,(char *)rsa)
# define SSL_CTX_set_tmp_dh(ctx,dh) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH,0,(char *)dh)
# define SSL_CTX_set_tmp_ecdh(ctx,ecdh) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH,0,(char *)ecdh)
# define SSL_CTX_set_dh_auto(ctx, onoff) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_DH_AUTO,onoff,NULL)
# define SSL_set_dh_auto(s, onoff) \
        SSL_ctrl(s,SSL_CTRL_SET_DH_AUTO,onoff,NULL)
# define SSL_need_tmp_RSA(ssl) \
        SSL_ctrl(ssl,SSL_CTRL_NEED_TMP_RSA,0,NULL)
# define SSL_set_tmp_rsa(ssl,rsa) \
        SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA,0,(char *)rsa)
# define SSL_set_tmp_dh(ssl,dh) \
        SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH,0,(char *)dh)
# define SSL_set_tmp_ecdh(ssl,ecdh) \
        SSL_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH,0,(char *)ecdh)
# define SSL_CTX_add_extra_chain_cert(ctx,x509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_EXTRA_CHAIN_CERT,0,(char *)x509)
# define SSL_CTX_get_extra_chain_certs(ctx,px509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_EXTRA_CHAIN_CERTS,0,px509)
# define SSL_CTX_get_extra_chain_certs_only(ctx,px509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_EXTRA_CHAIN_CERTS,1,px509)
# define SSL_CTX_clear_extra_chain_certs(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS,0,NULL)
# define SSL_CTX_set0_chain(ctx,sk) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN,0,(char *)sk)
# define SSL_CTX_set1_chain(ctx,sk) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN,1,(char *)sk)
# define SSL_CTX_add0_chain_cert(ctx,x509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN_CERT,0,(char *)x509)
# define SSL_CTX_add1_chain_cert(ctx,x509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN_CERT,1,(char *)x509)
# define SSL_CTX_get0_chain_certs(ctx,px509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_CHAIN_CERTS,0,px509)
# define SSL_CTX_clear_chain_certs(ctx) \
        SSL_CTX_set0_chain(ctx,NULL)
# define SSL_CTX_build_cert_chain(ctx, flags) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_BUILD_CERT_CHAIN, flags, NULL)
# define SSL_CTX_select_current_cert(ctx,x509) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SELECT_CURRENT_CERT,0,(char *)x509)
# define SSL_CTX_set_current_cert(ctx, op) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CURRENT_CERT, op, NULL)
# define SSL_CTX_set0_verify_cert_store(ctx,st) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_VERIFY_CERT_STORE,0,(char *)st)
# define SSL_CTX_set1_verify_cert_store(ctx,st) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_VERIFY_CERT_STORE,1,(char *)st)
# define SSL_CTX_set0_chain_cert_store(ctx,st) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CHAIN_CERT_STORE,0,(char *)st)
# define SSL_CTX_set1_chain_cert_store(ctx,st) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CHAIN_CERT_STORE,1,(char *)st)
# define SSL_set0_chain(ctx,sk) \
        SSL_ctrl(ctx,SSL_CTRL_CHAIN,0,(char *)sk)
# define SSL_set1_chain(ctx,sk) \
        SSL_ctrl(ctx,SSL_CTRL_CHAIN,1,(char *)sk)
# define SSL_add0_chain_cert(ctx,x509) \
        SSL_ctrl(ctx,SSL_CTRL_CHAIN_CERT,0,(char *)x509)
# define SSL_add1_chain_cert(ctx,x509) \
        SSL_ctrl(ctx,SSL_CTRL_CHAIN_CERT,1,(char *)x509)
# define SSL_get0_chain_certs(ctx,px509) \
        SSL_ctrl(ctx,SSL_CTRL_GET_CHAIN_CERTS,0,px509)
# define SSL_clear_chain_certs(ctx) \
        SSL_set0_chain(ctx,NULL)
# define SSL_build_cert_chain(s, flags) \
        SSL_ctrl(s,SSL_CTRL_BUILD_CERT_CHAIN, flags, NULL)
# define SSL_select_current_cert(ctx,x509) \
        SSL_ctrl(ctx,SSL_CTRL_SELECT_CURRENT_CERT,0,(char *)x509)
# define SSL_set_current_cert(ctx,op) \
        SSL_ctrl(ctx,SSL_CTRL_SET_CURRENT_CERT, op, NULL)
# define SSL_set0_verify_cert_store(s,st) \
        SSL_ctrl(s,SSL_CTRL_SET_VERIFY_CERT_STORE,0,(char *)st)
# define SSL_set1_verify_cert_store(s,st) \
        SSL_ctrl(s,SSL_CTRL_SET_VERIFY_CERT_STORE,1,(char *)st)
# define SSL_set0_chain_cert_store(s,st) \
        SSL_ctrl(s,SSL_CTRL_SET_CHAIN_CERT_STORE,0,(char *)st)
# define SSL_set1_chain_cert_store(s,st) \
        SSL_ctrl(s,SSL_CTRL_SET_CHAIN_CERT_STORE,1,(char *)st)
# define SSL_get1_curves(ctx, s) \
        SSL_ctrl(ctx,SSL_CTRL_GET_CURVES,0,(char *)s)
# define SSL_CTX_set1_curves(ctx, clist, clistlen) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CURVES,clistlen,(char *)clist)
# define SSL_CTX_set1_curves_list(ctx, s) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CURVES_LIST,0,(char *)s)
# define SSL_set1_curves(ctx, clist, clistlen) \
        SSL_ctrl(ctx,SSL_CTRL_SET_CURVES,clistlen,(char *)clist)
# define SSL_set1_curves_list(ctx, s) \
        SSL_ctrl(ctx,SSL_CTRL_SET_CURVES_LIST,0,(char *)s)
# define SSL_get_shared_curve(s, n) \
        SSL_ctrl(s,SSL_CTRL_GET_SHARED_CURVE,n,NULL)
# define SSL_CTX_set_ecdh_auto(ctx, onoff) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_ECDH_AUTO,onoff,NULL)
# define SSL_set_ecdh_auto(s, onoff) \
        SSL_ctrl(s,SSL_CTRL_SET_ECDH_AUTO,onoff,NULL)
# define SSL_CTX_set1_sigalgs(ctx, slist, slistlen) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_SIGALGS,slistlen,(int *)slist)
# define SSL_CTX_set1_sigalgs_list(ctx, s) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_SIGALGS_LIST,0,(char *)s)
# define SSL_set1_sigalgs(ctx, slist, slistlen) \
        SSL_ctrl(ctx,SSL_CTRL_SET_SIGALGS,clistlen,(int *)slist)
# define SSL_set1_sigalgs_list(ctx, s) \
        SSL_ctrl(ctx,SSL_CTRL_SET_SIGALGS_LIST,0,(char *)s)
# define SSL_CTX_set1_client_sigalgs(ctx, slist, slistlen) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CLIENT_SIGALGS,slistlen,(int *)slist)
# define SSL_CTX_set1_client_sigalgs_list(ctx, s) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CLIENT_SIGALGS_LIST,0,(char *)s)
# define SSL_set1_client_sigalgs(ctx, slist, slistlen) \
        SSL_ctrl(ctx,SSL_CTRL_SET_CLIENT_SIGALGS,clistlen,(int *)slist)
# define SSL_set1_client_sigalgs_list(ctx, s) \
        SSL_ctrl(ctx,SSL_CTRL_SET_CLIENT_SIGALGS_LIST,0,(char *)s)
# define SSL_get0_certificate_types(s, clist) \
        SSL_ctrl(s, SSL_CTRL_GET_CLIENT_CERT_TYPES, 0, (char *)clist)
# define SSL_CTX_set1_client_certificate_types(ctx, clist, clistlen) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CLIENT_CERT_TYPES,clistlen,(char *)clist)
# define SSL_set1_client_certificate_types(s, clist, clistlen) \
        SSL_ctrl(s,SSL_CTRL_SET_CLIENT_CERT_TYPES,clistlen,(char *)clist)
# define SSL_get_peer_signature_nid(s, pn) \
        SSL_ctrl(s,SSL_CTRL_GET_PEER_SIGNATURE_NID,0,pn)
# define SSL_get_server_tmp_key(s, pk) \
        SSL_ctrl(s,SSL_CTRL_GET_SERVER_TMP_KEY,0,pk)
# define SSL_get0_raw_cipherlist(s, plst) \
        SSL_ctrl(s,SSL_CTRL_GET_RAW_CIPHERLIST,0,plst)
# define SSL_get0_ec_point_formats(s, plst) \
        SSL_ctrl(s,SSL_CTRL_GET_EC_POINT_FORMATS,0,plst)

BIO_METHOD *BIO_f_ssl(void);
BIO *BIO_new_ssl(SSL_CTX *ctx, int client);
BIO *BIO_new_ssl_connect(SSL_CTX *ctx);
BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx);
int BIO_ssl_copy_session_id(BIO *to, BIO *from);
void BIO_ssl_shutdown(BIO *ssl_bio);

int SSL_CTX_set_cipher_list(SSL_CTX *, const char *str);
SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth);
void SSL_CTX_free(SSL_CTX *);
long SSL_CTX_set_timeout(SSL_CTX *ctx, long t);
long SSL_CTX_get_timeout(const SSL_CTX *ctx);
X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *);
void SSL_CTX_set_cert_store(SSL_CTX *, X509_STORE *);
int SSL_want(const SSL *s);
int SSL_clear(SSL *s);

void SSL_CTX_flush_sessions(SSL_CTX *ctx, long tm);

const SSL_CIPHER *SSL_get_current_cipher(const SSL *s);
int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits);
char *SSL_CIPHER_get_version(const SSL_CIPHER *c);
const char *SSL_CIPHER_get_name(const SSL_CIPHER *c);
unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c);

int SSL_get_fd(const SSL *s);
int SSL_get_rfd(const SSL *s);
int SSL_get_wfd(const SSL *s);
const char *SSL_get_cipher_list(const SSL *s, int n);
char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len);
int SSL_get_read_ahead(const SSL *s);
int SSL_pending(const SSL *s);
# ifndef OPENSSL_NO_SOCK
int SSL_set_fd(SSL *s, int fd);
int SSL_set_rfd(SSL *s, int fd);
int SSL_set_wfd(SSL *s, int fd);
# endif
void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio);
BIO *SSL_get_rbio(const SSL *s);
BIO *SSL_get_wbio(const SSL *s);
int SSL_set_cipher_list(SSL *s, const char *str);
void SSL_set_read_ahead(SSL *s, int yes);
int SSL_get_verify_mode(const SSL *s);
int SSL_get_verify_depth(const SSL *s);
int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *);
void SSL_set_verify(SSL *s, int mode,
                    int (*callback) (int ok, X509_STORE_CTX *ctx));
void SSL_set_verify_depth(SSL *s, int depth);
void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg);
# ifndef OPENSSL_NO_RSA
int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa);
# endif
int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const unsigned char *d, long len);
int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey);
int SSL_use_PrivateKey_ASN1(int pk, SSL *ssl, const unsigned char *d,
                            long len);
int SSL_use_certificate(SSL *ssl, X509 *x);
int SSL_use_certificate_ASN1(SSL *ssl, const unsigned char *d, int len);

# ifndef OPENSSL_NO_TLSEXT
/* Set serverinfo data for the current active cert. */
int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
                           size_t serverinfo_length);
#  ifndef OPENSSL_NO_STDIO
int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file);
#  endif                        /* NO_STDIO */

# endif

# ifndef OPENSSL_NO_STDIO
int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type);
int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type);
int SSL_use_certificate_file(SSL *ssl, const char *file, int type);
int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type);
int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type);
int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type);
/* PEM type */
int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file);
STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stackCAs,
                                        const char *file);
#  ifndef OPENSSL_SYS_VMS
int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stackCAs,
                                       const char *dir);
#  endif

# endif

void SSL_load_error_strings(void);
const char *SSL_state_string(const SSL *s);
const char *SSL_rstate_string(const SSL *s);
const char *SSL_state_string_long(const SSL *s);
const char *SSL_rstate_string_long(const SSL *s);
long SSL_SESSION_get_time(const SSL_SESSION *s);
long SSL_SESSION_set_time(SSL_SESSION *s, long t);
long SSL_SESSION_get_timeout(const SSL_SESSION *s);
long SSL_SESSION_set_timeout(SSL_SESSION *s, long t);
void SSL_copy_session_id(SSL *to, const SSL *from);
X509 *SSL_SESSION_get0_peer(SSL_SESSION *s);
int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
                                unsigned int sid_ctx_len);

SSL_SESSION *SSL_SESSION_new(void);
const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s,
                                        unsigned int *len);
unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s);
# ifndef OPENSSL_NO_STDIO
int SSL_SESSION_print_fp(FILE *fp, const SSL_SESSION *ses);
# endif
int SSL_SESSION_print(BIO *fp, const SSL_SESSION *ses);
int SSL_SESSION_print_keylog(BIO *bp, const SSL_SESSION *x);
void SSL_SESSION_free(SSL_SESSION *ses);
int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp);
int SSL_set_session(SSL *to, SSL_SESSION *session);
int SSL_CTX_add_session(SSL_CTX *s, SSL_SESSION *c);
int SSL_CTX_remove_session(SSL_CTX *, SSL_SESSION *c);
int SSL_CTX_set_generate_session_id(SSL_CTX *, GEN_SESSION_CB);
int SSL_set_generate_session_id(SSL *, GEN_SESSION_CB);
int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
                                unsigned int id_len);
SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
                             long length);

# ifdef HEADER_X509_H
X509 *SSL_get_peer_certificate(const SSL *s);
# endif

STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s);

int SSL_CTX_get_verify_mode(const SSL_CTX *ctx);
int SSL_CTX_get_verify_depth(const SSL_CTX *ctx);
int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int,
                                                        X509_STORE_CTX *);
void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
                        int (*callback) (int, X509_STORE_CTX *));
void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth);
void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
                                      int (*cb) (X509_STORE_CTX *, void *),
                                      void *arg);
void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg),
                         void *arg);
# ifndef OPENSSL_NO_RSA
int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);
# endif
int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const unsigned char *d,
                                   long len);
int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);
int SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX *ctx,
                                const unsigned char *d, long len);
int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);
int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len,
                                 const unsigned char *d);

void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb);
void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u);

int SSL_CTX_check_private_key(const SSL_CTX *ctx);
int SSL_check_private_key(const SSL *ctx);

int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
                                   unsigned int sid_ctx_len);

SSL *SSL_new(SSL_CTX *ctx);
int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
                               unsigned int sid_ctx_len);

int SSL_CTX_set_purpose(SSL_CTX *s, int purpose);
int SSL_set_purpose(SSL *s, int purpose);
int SSL_CTX_set_trust(SSL_CTX *s, int trust);
int SSL_set_trust(SSL *s, int trust);

int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm);
int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm);

X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx);
X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl);

# ifndef OPENSSL_NO_SRP
int SSL_CTX_set_srp_username(SSL_CTX *ctx, char *name);
int SSL_CTX_set_srp_password(SSL_CTX *ctx, char *password);
int SSL_CTX_set_srp_strength(SSL_CTX *ctx, int strength);
int SSL_CTX_set_srp_client_pwd_callback(SSL_CTX *ctx,
                                        char *(*cb) (SSL *, void *));
int SSL_CTX_set_srp_verify_param_callback(SSL_CTX *ctx,
                                          int (*cb) (SSL *, void *));
int SSL_CTX_set_srp_username_callback(SSL_CTX *ctx,
                                      int (*cb) (SSL *, int *, void *));
int SSL_CTX_set_srp_cb_arg(SSL_CTX *ctx, void *arg);

int SSL_set_srp_server_param(SSL *s, const BIGNUM *N, const BIGNUM *g,
                             BIGNUM *sa, BIGNUM *v, char *info);
int SSL_set_srp_server_param_pw(SSL *s, const char *user, const char *pass,
                                const char *grp);

BIGNUM *SSL_get_srp_g(SSL *s);
BIGNUM *SSL_get_srp_N(SSL *s);

char *SSL_get_srp_username(SSL *s);
char *SSL_get_srp_userinfo(SSL *s);
# endif

void SSL_certs_clear(SSL *s);
void SSL_free(SSL *ssl);
int SSL_accept(SSL *ssl);
int SSL_connect(SSL *ssl);
int SSL_read(SSL *ssl, void *buf, int num);
int SSL_peek(SSL *ssl, void *buf, int num);
int SSL_write(SSL *ssl, const void *buf, int num);
long SSL_ctrl(SSL *ssl, int cmd, long larg, void *parg);
long SSL_callback_ctrl(SSL *, int, void (*)(void));
long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg);
long SSL_CTX_callback_ctrl(SSL_CTX *, int, void (*)(void));

int SSL_get_error(const SSL *s, int ret_code);
const char *SSL_get_version(const SSL *s);

/* This sets the 'default' SSL version that SSL_new() will create */
int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth);

# ifndef OPENSSL_NO_SSL3_METHOD
const SSL_METHOD *SSLv3_method(void); /* SSLv3 */
const SSL_METHOD *SSLv3_server_method(void); /* SSLv3 */
const SSL_METHOD *SSLv3_client_method(void); /* SSLv3 */
# endif

const SSL_METHOD *SSLv23_method(void); /* Negotiate highest available SSL/TLS
                                        * version */
const SSL_METHOD *SSLv23_server_method(void); /* Negotiate highest available
                                               * SSL/TLS version */
const SSL_METHOD *SSLv23_client_method(void); /* Negotiate highest available
                                               * SSL/TLS version */

const SSL_METHOD *TLSv1_method(void); /* TLSv1.0 */
const SSL_METHOD *TLSv1_server_method(void); /* TLSv1.0 */
const SSL_METHOD *TLSv1_client_method(void); /* TLSv1.0 */

const SSL_METHOD *TLSv1_1_method(void); /* TLSv1.1 */
const SSL_METHOD *TLSv1_1_server_method(void); /* TLSv1.1 */
const SSL_METHOD *TLSv1_1_client_method(void); /* TLSv1.1 */

const SSL_METHOD *TLSv1_2_method(void); /* TLSv1.2 */
const SSL_METHOD *TLSv1_2_server_method(void); /* TLSv1.2 */
const SSL_METHOD *TLSv1_2_client_method(void); /* TLSv1.2 */

const SSL_METHOD *DTLSv1_method(void); /* DTLSv1.0 */
const SSL_METHOD *DTLSv1_server_method(void); /* DTLSv1.0 */
const SSL_METHOD *DTLSv1_client_method(void); /* DTLSv1.0 */

const SSL_METHOD *DTLSv1_2_method(void); /* DTLSv1.2 */
const SSL_METHOD *DTLSv1_2_server_method(void); /* DTLSv1.2 */
const SSL_METHOD *DTLSv1_2_client_method(void); /* DTLSv1.2 */

const SSL_METHOD *DTLS_method(void); /* DTLS 1.0 and 1.2 */
const SSL_METHOD *DTLS_server_method(void); /* DTLS 1.0 and 1.2 */
const SSL_METHOD *DTLS_client_method(void); /* DTLS 1.0 and 1.2 */

STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s);
STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s);

int SSL_do_handshake(SSL *s);
int SSL_renegotiate(SSL *s);
int SSL_renegotiate_abbreviated(SSL *s);
int SSL_renegotiate_pending(SSL *s);
int SSL_shutdown(SSL *s);

const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx);
const SSL_METHOD *SSL_get_ssl_method(SSL *s);
int SSL_set_ssl_method(SSL *s, const SSL_METHOD *method);
const char *SSL_alert_type_string_long(int value);
const char *SSL_alert_type_string(int value);
const char *SSL_alert_desc_string_long(int value);
const char *SSL_alert_desc_string(int value);

void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list);
void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list);
STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s);
STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *s);
int SSL_add_client_CA(SSL *ssl, X509 *x);
int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x);

void SSL_set_connect_state(SSL *s);
void SSL_set_accept_state(SSL *s);

long SSL_get_default_timeout(const SSL *s);

int SSL_library_init(void);

char *SSL_CIPHER_description(const SSL_CIPHER *, char *buf, int size);
STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk);

SSL *SSL_dup(SSL *ssl);

X509 *SSL_get_certificate(const SSL *ssl);
/*
 * EVP_PKEY
 */ struct evp_pkey_st *SSL_get_privatekey(const SSL *ssl);

X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx);
EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx);

void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode);
int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);
void SSL_set_quiet_shutdown(SSL *ssl, int mode);
int SSL_get_quiet_shutdown(const SSL *ssl);
void SSL_set_shutdown(SSL *ssl, int mode);
int SSL_get_shutdown(const SSL *ssl);
int SSL_version(const SSL *ssl);
int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx);
int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
                                  const char *CApath);
# define SSL_get0_session SSL_get_session/* just peek at pointer */
SSL_SESSION *SSL_get_session(const SSL *ssl);
SSL_SESSION *SSL_get1_session(SSL *ssl); /* obtain a reference count */
SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl);
SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx);
void SSL_set_info_callback(SSL *ssl,
                           void (*cb) (const SSL *ssl, int type, int val));
void (*SSL_get_info_callback(const SSL *ssl)) (const SSL *ssl, int type,
                                               int val);
int SSL_state(const SSL *ssl);
void SSL_set_state(SSL *ssl, int state);

void SSL_set_verify_result(SSL *ssl, long v);
long SSL_get_verify_result(const SSL *ssl);

int SSL_set_ex_data(SSL *ssl, int idx, void *data);
void *SSL_get_ex_data(const SSL *ssl, int idx);
int SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
                         CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);

int SSL_SESSION_set_ex_data(SSL_SESSION *ss, int idx, void *data);
void *SSL_SESSION_get_ex_data(const SSL_SESSION *ss, int idx);
int SSL_SESSION_get_ex_new_index(long argl, void *argp,
                                 CRYPTO_EX_new *new_func,
                                 CRYPTO_EX_dup *dup_func,
                                 CRYPTO_EX_free *free_func);

int SSL_CTX_set_ex_data(SSL_CTX *ssl, int idx, void *data);
void *SSL_CTX_get_ex_data(const SSL_CTX *ssl, int idx);
int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
                             CRYPTO_EX_dup *dup_func,
                             CRYPTO_EX_free *free_func);

int SSL_get_ex_data_X509_STORE_CTX_idx(void);

# define SSL_CTX_sess_set_cache_size(ctx,t) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_SESS_CACHE_SIZE,t,NULL)
# define SSL_CTX_sess_get_cache_size(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_SESS_CACHE_SIZE,0,NULL)
# define SSL_CTX_set_session_cache_mode(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_SESS_CACHE_MODE,m,NULL)
# define SSL_CTX_get_session_cache_mode(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_SESS_CACHE_MODE,0,NULL)

# define SSL_CTX_get_default_read_ahead(ctx) SSL_CTX_get_read_ahead(ctx)
# define SSL_CTX_set_default_read_ahead(ctx,m) SSL_CTX_set_read_ahead(ctx,m)
# define SSL_CTX_get_read_ahead(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_READ_AHEAD,0,NULL)
# define SSL_CTX_set_read_ahead(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_READ_AHEAD,m,NULL)
# define SSL_CTX_get_max_cert_list(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_MAX_CERT_LIST,0,NULL)
# define SSL_CTX_set_max_cert_list(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_MAX_CERT_LIST,m,NULL)
# define SSL_get_max_cert_list(ssl) \
        SSL_ctrl(ssl,SSL_CTRL_GET_MAX_CERT_LIST,0,NULL)
# define SSL_set_max_cert_list(ssl,m) \
        SSL_ctrl(ssl,SSL_CTRL_SET_MAX_CERT_LIST,m,NULL)

# define SSL_CTX_set_max_send_fragment(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_MAX_SEND_FRAGMENT,m,NULL)
# define SSL_set_max_send_fragment(ssl,m) \
        SSL_ctrl(ssl,SSL_CTRL_SET_MAX_SEND_FRAGMENT,m,NULL)

     /* NB: the keylength is only applicable when is_export is true */
# ifndef OPENSSL_NO_RSA
void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,
                                  RSA *(*cb) (SSL *ssl, int is_export,
                                              int keylength));

void SSL_set_tmp_rsa_callback(SSL *ssl,
                              RSA *(*cb) (SSL *ssl, int is_export,
                                          int keylength));
# endif
# ifndef OPENSSL_NO_DH
void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
                                 DH *(*dh) (SSL *ssl, int is_export,
                                            int keylength));
void SSL_set_tmp_dh_callback(SSL *ssl,
                             DH *(*dh) (SSL *ssl, int is_export,
                                        int keylength));
# endif
# ifndef OPENSSL_NO_ECDH
void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,
                                   EC_KEY *(*ecdh) (SSL *ssl, int is_export,
                                                    int keylength));
void SSL_set_tmp_ecdh_callback(SSL *ssl,
                               EC_KEY *(*ecdh) (SSL *ssl, int is_export,
                                                int keylength));
# endif

# ifndef OPENSSL_NO_COMP
const COMP_METHOD *SSL_get_current_compression(SSL *s);
const COMP_METHOD *SSL_get_current_expansion(SSL *s);
const char *SSL_COMP_get_name(const COMP_METHOD *comp);
STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void);
STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
                                                      *meths);
void SSL_COMP_free_compression_methods(void);
int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm);
# else
const void *SSL_get_current_compression(SSL *s);
const void *SSL_get_current_expansion(SSL *s);
const char *SSL_COMP_get_name(const void *comp);
void *SSL_COMP_get_compression_methods(void);
int SSL_COMP_add_compression_method(int id, void *cm);
# endif

const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr);

/* TLS extensions functions */
int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len);

int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
                                  void *arg);

/* Pre-shared secret session resumption functions */
int SSL_set_session_secret_cb(SSL *s,
                              tls_session_secret_cb_fn tls_session_secret_cb,
                              void *arg);

void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
                                                int (*cb) (SSL *ssl,
                                                           int
                                                           is_forward_secure));

void SSL_set_not_resumable_session_callback(SSL *ssl,
                                            int (*cb) (SSL *ssl,
                                                       int
                                                       is_forward_secure));

void SSL_set_debug(SSL *s, int debug);
int SSL_cache_hit(SSL *s);
int SSL_is_server(SSL *s);

SSL_CONF_CTX *SSL_CONF_CTX_new(void);
int SSL_CONF_CTX_finish(SSL_CONF_CTX *cctx);
void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx);
unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags);
unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags);
int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre);

void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl);
void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx);

int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value);
int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv);
int SSL_CONF_cmd_value_type(SSL_CONF_CTX *cctx, const char *cmd);

# ifndef OPENSSL_NO_SSL_TRACE
void SSL_trace(int write_p, int version, int content_type,
               const void *buf, size_t len, SSL *ssl, void *arg);
const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c);
# endif

/* What the "other" parameter contains in security callback */
/* Mask for type */
# define SSL_SECOP_OTHER_TYPE    0xffff0000
# define SSL_SECOP_OTHER_NONE    0
# define SSL_SECOP_OTHER_CIPHER  (1 << 16)
# define SSL_SECOP_OTHER_CURVE   (2 << 16)
# define SSL_SECOP_OTHER_DH      (3 << 16)
# define SSL_SECOP_OTHER_PKEY    (4 << 16)
# define SSL_SECOP_OTHER_SIGALG  (5 << 16)
# define SSL_SECOP_OTHER_CERT    (6 << 16)

/* Indicated operation refers to peer key or certificate */
# define SSL_SECOP_PEER          0x1000

/* Values for "op" parameter in security callback */

/* Called to filter ciphers */
/* Ciphers client supports */
# define SSL_SECOP_CIPHER_SUPPORTED      (1 | SSL_SECOP_OTHER_CIPHER)
/* Cipher shared by client/server */
# define SSL_SECOP_CIPHER_SHARED         (2 | SSL_SECOP_OTHER_CIPHER)
/* Sanity check of cipher server selects */
# define SSL_SECOP_CIPHER_CHECK          (3 | SSL_SECOP_OTHER_CIPHER)
/* Curves supported by client */
# define SSL_SECOP_CURVE_SUPPORTED       (4 | SSL_SECOP_OTHER_CURVE)
/* Curves shared by client/server */
# define SSL_SECOP_CURVE_SHARED          (5 | SSL_SECOP_OTHER_CURVE)
/* Sanity check of curve server selects */
# define SSL_SECOP_CURVE_CHECK           (6 | SSL_SECOP_OTHER_CURVE)
/* Temporary DH key */
# define SSL_SECOP_TMP_DH                (7 | SSL_SECOP_OTHER_DH)
/* SSL/TLS version */
# define SSL_SECOP_VERSION               (9 | SSL_SECOP_OTHER_NONE)
/* Session tickets */
# define SSL_SECOP_TICKET                (10 | SSL_SECOP_OTHER_NONE)
/* Supported signature algorithms sent to peer */
# define SSL_SECOP_SIGALG_SUPPORTED      (11 | SSL_SECOP_OTHER_SIGALG)
/* Shared signature algorithm */
# define SSL_SECOP_SIGALG_SHARED         (12 | SSL_SECOP_OTHER_SIGALG)
/* Sanity check signature algorithm allowed */
# define SSL_SECOP_SIGALG_CHECK          (13 | SSL_SECOP_OTHER_SIGALG)
/* Used to get mask of supported public key signature algorithms */
# define SSL_SECOP_SIGALG_MASK           (14 | SSL_SECOP_OTHER_SIGALG)
/* Use to see if compression is allowed */
# define SSL_SECOP_COMPRESSION           (15 | SSL_SECOP_OTHER_NONE)
/* EE key in certificate */
# define SSL_SECOP_EE_KEY                (16 | SSL_SECOP_OTHER_CERT)
/* CA key in certificate */
# define SSL_SECOP_CA_KEY                (17 | SSL_SECOP_OTHER_CERT)
/* CA digest algorithm in certificate */
# define SSL_SECOP_CA_MD                 (18 | SSL_SECOP_OTHER_CERT)
/* Peer EE key in certificate */
# define SSL_SECOP_PEER_EE_KEY           (SSL_SECOP_EE_KEY | SSL_SECOP_PEER)
/* Peer CA key in certificate */
# define SSL_SECOP_PEER_CA_KEY           (SSL_SECOP_CA_KEY | SSL_SECOP_PEER)
/* Peer CA digest algorithm in certificate */
# define SSL_SECOP_PEER_CA_MD            (SSL_SECOP_CA_MD | SSL_SECOP_PEER)

void SSL_set_security_level(SSL *s, int level);
int SSL_get_security_level(const SSL *s);
void SSL_set_security_callback(SSL *s,
                               int (*cb) (SSL *s, SSL_CTX *ctx, int op,
                                          int bits, int nid, void *other,
                                          void *ex));
int (*SSL_get_security_callback(const SSL *s)) (SSL *s, SSL_CTX *ctx, int op,
                                                int bits, int nid,
                                                void *other, void *ex);
void SSL_set0_security_ex_data(SSL *s, void *ex);
void *SSL_get0_security_ex_data(const SSL *s);

void SSL_CTX_set_security_level(SSL_CTX *ctx, int level);
int SSL_CTX_get_security_level(const SSL_CTX *ctx);
void SSL_CTX_set_security_callback(SSL_CTX *ctx,
                                   int (*cb) (SSL *s, SSL_CTX *ctx, int op,
                                              int bits, int nid, void *other,
                                              void *ex));
int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (SSL *s,
                                                          SSL_CTX *ctx,
                                                          int op, int bits,
                                                          int nid,
                                                          void *other,
                                                          void *ex);
void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex);
void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx);

# ifndef OPENSSL_NO_UNIT_TEST
const struct openssl_ssl_test_functions *SSL_test_functions(void);
# endif

/* BEGIN ERROR CODES */
/*
 * The following lines are auto generated by the script mkerr.pl. Any changes
 * made after this point may be overwritten when the script is next run.
 */
void ERR_load_SSL_strings(void);

/* Error codes for the SSL functions. */

/* Function codes. */
# define SSL_F_CHECK_SUITEB_CIPHER_LIST                   331
# define SSL_F_D2I_SSL_SESSION                            103
# define SSL_F_DO_DTLS1_WRITE                             245
# define SSL_F_DO_SSL3_WRITE                              104
# define SSL_F_DTLS1_ACCEPT                               246
# define SSL_F_DTLS1_ADD_CERT_TO_BUF                      295
# define SSL_F_DTLS1_BUFFER_RECORD                        247
# define SSL_F_DTLS1_CHECK_TIMEOUT_NUM                    318
# define SSL_F_DTLS1_CLIENT_HELLO                         248
# define SSL_F_DTLS1_CONNECT                              249
# define SSL_F_DTLS1_ENC                                  250
# define SSL_F_DTLS1_GET_HELLO_VERIFY                     251
# define SSL_F_DTLS1_GET_MESSAGE                          252
# define SSL_F_DTLS1_GET_MESSAGE_FRAGMENT                 253
# define SSL_F_DTLS1_GET_RECORD                           254
# define SSL_F_DTLS1_HANDLE_TIMEOUT                       297
# define SSL_F_DTLS1_HEARTBEAT                            305
# define SSL_F_DTLS1_OUTPUT_CERT_CHAIN                    255
# define SSL_F_DTLS1_PREPROCESS_FRAGMENT                  288
# define SSL_F_DTLS1_PROCESS_OUT_OF_SEQ_MESSAGE           256
# define SSL_F_DTLS1_PROCESS_RECORD                       257
# define SSL_F_DTLS1_READ_BYTES                           258
# define SSL_F_DTLS1_READ_FAILED                          259
# define SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST             260
# define SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE              261
# define SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE             262
# define SSL_F_DTLS1_SEND_CLIENT_VERIFY                   263
# define SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST            264
# define SSL_F_DTLS1_SEND_SERVER_CERTIFICATE              265
# define SSL_F_DTLS1_SEND_SERVER_HELLO                    266
# define SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE             267
# define SSL_F_DTLS1_WRITE_APP_DATA_BYTES                 268
# define SSL_F_SSL23_ACCEPT                               115
# define SSL_F_SSL23_CLIENT_HELLO                         116
# define SSL_F_SSL23_CONNECT                              117
# define SSL_F_SSL23_GET_CLIENT_HELLO                     118
# define SSL_F_SSL23_GET_SERVER_HELLO                     119
# define SSL_F_SSL23_PEEK                                 237
# define SSL_F_SSL23_READ                                 120
# define SSL_F_SSL23_WRITE                                121
# define SSL_F_SSL3_ACCEPT                                128
# define SSL_F_SSL3_ADD_CERT_TO_BUF                       296
# define SSL_F_SSL3_CALLBACK_CTRL                         233
# define SSL_F_SSL3_CHANGE_CIPHER_STATE                   129
# define SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM              130
# define SSL_F_SSL3_CHECK_CLIENT_HELLO                    304
# define SSL_F_SSL3_CLIENT_HELLO                          131
# define SSL_F_SSL3_CONNECT                               132
# define SSL_F_SSL3_CTRL                                  213
# define SSL_F_SSL3_CTX_CTRL                              133
# define SSL_F_SSL3_DIGEST_CACHED_RECORDS                 293
# define SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC                 292
# define SSL_F_SSL3_ENC                                   134
# define SSL_F_SSL3_GENERATE_KEY_BLOCK                    238
# define SSL_F_SSL3_GET_CERTIFICATE_REQUEST               135
# define SSL_F_SSL3_GET_CERT_STATUS                       289
# define SSL_F_SSL3_GET_CERT_VERIFY                       136
# define SSL_F_SSL3_GET_CLIENT_CERTIFICATE                137
# define SSL_F_SSL3_GET_CLIENT_HELLO                      138
# define SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE               139
# define SSL_F_SSL3_GET_FINISHED                          140
# define SSL_F_SSL3_GET_KEY_EXCHANGE                      141
# define SSL_F_SSL3_GET_MESSAGE                           142
# define SSL_F_SSL3_GET_NEW_SESSION_TICKET                283
# define SSL_F_SSL3_GET_NEXT_PROTO                        306
# define SSL_F_SSL3_GET_RECORD                            143
# define SSL_F_SSL3_GET_SERVER_CERTIFICATE                144
# define SSL_F_SSL3_GET_SERVER_DONE                       145
# define SSL_F_SSL3_GET_SERVER_HELLO                      146
# define SSL_F_SSL3_HANDSHAKE_MAC                         285
# define SSL_F_SSL3_NEW_SESSION_TICKET                    287
# define SSL_F_SSL3_OUTPUT_CERT_CHAIN                     147
# define SSL_F_SSL3_PEEK                                  235
# define SSL_F_SSL3_READ_BYTES                            148
# define SSL_F_SSL3_READ_N                                149
# define SSL_F_SSL3_SEND_CERTIFICATE_REQUEST              150
# define SSL_F_SSL3_SEND_CLIENT_CERTIFICATE               151
# define SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE              152
# define SSL_F_SSL3_SEND_CLIENT_VERIFY                    153
# define SSL_F_SSL3_SEND_SERVER_CERTIFICATE               154
# define SSL_F_SSL3_SEND_SERVER_HELLO                     242
# define SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE              155
# define SSL_F_SSL3_SETUP_KEY_BLOCK                       157
# define SSL_F_SSL3_SETUP_READ_BUFFER                     156
# define SSL_F_SSL3_SETUP_WRITE_BUFFER                    291
# define SSL_F_SSL3_WRITE_BYTES                           158
# define SSL_F_SSL3_WRITE_PENDING                         159
# define SSL_F_SSL_ADD_CERT_CHAIN                         316
# define SSL_F_SSL_ADD_CERT_TO_BUF                        319
# define SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT        298
# define SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT                 277
# define SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT           307
# define SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK         215
# define SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK        216
# define SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT        299
# define SSL_F_SSL_ADD_SERVERHELLO_TLSEXT                 278
# define SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT           308
# define SSL_F_SSL_BAD_METHOD                             160
# define SSL_F_SSL_BUILD_CERT_CHAIN                       332
# define SSL_F_SSL_BYTES_TO_CIPHER_LIST                   161
# define SSL_F_SSL_CERT_ADD0_CHAIN_CERT                   339
# define SSL_F_SSL_CERT_DUP                               221
# define SSL_F_SSL_CERT_INST                              222
# define SSL_F_SSL_CERT_INSTANTIATE                       214
# define SSL_F_SSL_CERT_NEW                               162
# define SSL_F_SSL_CERT_SET0_CHAIN                        340
# define SSL_F_SSL_CHECK_PRIVATE_KEY                      163
# define SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT               280
# define SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG            279
# define SSL_F_SSL_CIPHER_PROCESS_RULESTR                 230
# define SSL_F_SSL_CIPHER_STRENGTH_SORT                   231
# define SSL_F_SSL_CLEAR                                  164
# define SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD            165
# define SSL_F_SSL_CONF_CMD                               334
# define SSL_F_SSL_CREATE_CIPHER_LIST                     166
# define SSL_F_SSL_CTRL                                   232
# define SSL_F_SSL_CTX_CHECK_PRIVATE_KEY                  168
# define SSL_F_SSL_CTX_MAKE_PROFILES                      309
# define SSL_F_SSL_CTX_NEW                                169
# define SSL_F_SSL_CTX_SET_CIPHER_LIST                    269
# define SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE             290
# define SSL_F_SSL_CTX_SET_PURPOSE                        226
# define SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT             219
# define SSL_F_SSL_CTX_SET_SSL_VERSION                    170
# define SSL_F_SSL_CTX_SET_TRUST                          229
# define SSL_F_SSL_CTX_USE_CERTIFICATE                    171
# define SSL_F_SSL_CTX_USE_CERTIFICATE_ASN1               172
# define SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE         220
# define SSL_F_SSL_CTX_USE_CERTIFICATE_FILE               173
# define SSL_F_SSL_CTX_USE_PRIVATEKEY                     174
# define SSL_F_SSL_CTX_USE_PRIVATEKEY_ASN1                175
# define SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE                176
# define SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT              272
# define SSL_F_SSL_CTX_USE_RSAPRIVATEKEY                  177
# define SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_ASN1             178
# define SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE             179
# define SSL_F_SSL_CTX_USE_SERVERINFO                     336
# define SSL_F_SSL_CTX_USE_SERVERINFO_FILE                337
# define SSL_F_SSL_DO_HANDSHAKE                           180
# define SSL_F_SSL_GET_NEW_SESSION                        181
# define SSL_F_SSL_GET_PREV_SESSION                       217
# define SSL_F_SSL_GET_SERVER_CERT_INDEX                  322
# define SSL_F_SSL_GET_SERVER_SEND_CERT                   182
# define SSL_F_SSL_GET_SERVER_SEND_PKEY                   317
# define SSL_F_SSL_GET_SIGN_PKEY                          183
# define SSL_F_SSL_INIT_WBIO_BUFFER                       184
# define SSL_F_SSL_LOAD_CLIENT_CA_FILE                    185
# define SSL_F_SSL_NEW                                    186
# define SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT      300
# define SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT               302
# define SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT         310
# define SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT      301
# define SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT               303
# define SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT         311
# define SSL_F_SSL_PEEK                                   270
# define SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT             281
# define SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT             282
# define SSL_F_SSL_READ                                   223
# define SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT                320
# define SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT                321
# define SSL_F_SSL_SESSION_NEW                            189
# define SSL_F_SSL_SESSION_PRINT_FP                       190
# define SSL_F_SSL_SESSION_SET1_ID_CONTEXT                312
# define SSL_F_SSL_SESS_CERT_NEW                          225
# define SSL_F_SSL_SET_CERT                               191
# define SSL_F_SSL_SET_CIPHER_LIST                        271
# define SSL_F_SSL_SET_FD                                 192
# define SSL_F_SSL_SET_PKEY                               193
# define SSL_F_SSL_SET_PURPOSE                            227
# define SSL_F_SSL_SET_RFD                                194
# define SSL_F_SSL_SET_SESSION                            195
# define SSL_F_SSL_SET_SESSION_ID_CONTEXT                 218
# define SSL_F_SSL_SET_SESSION_TICKET_EXT                 294
# define SSL_F_SSL_SET_TRUST                              228
# define SSL_F_SSL_SET_WFD                                196
# define SSL_F_SSL_SHUTDOWN                               224
# define SSL_F_SSL_SRP_CTX_INIT                           313
# define SSL_F_SSL_UNDEFINED_CONST_FUNCTION               243
# define SSL_F_SSL_UNDEFINED_FUNCTION                     197
# define SSL_F_SSL_UNDEFINED_VOID_FUNCTION                244
# define SSL_F_SSL_USE_CERTIFICATE                        198
# define SSL_F_SSL_USE_CERTIFICATE_ASN1                   199
# define SSL_F_SSL_USE_CERTIFICATE_FILE                   200
# define SSL_F_SSL_USE_PRIVATEKEY                         201
# define SSL_F_SSL_USE_PRIVATEKEY_ASN1                    202
# define SSL_F_SSL_USE_PRIVATEKEY_FILE                    203
# define SSL_F_SSL_USE_PSK_IDENTITY_HINT                  273
# define SSL_F_SSL_USE_RSAPRIVATEKEY                      204
# define SSL_F_SSL_USE_RSAPRIVATEKEY_ASN1                 205
# define SSL_F_SSL_USE_RSAPRIVATEKEY_FILE                 206
# define SSL_F_SSL_VERIFY_CERT_CHAIN                      207
# define SSL_F_SSL_WRITE                                  208
# define SSL_F_TLS12_CHECK_PEER_SIGALG                    333
# define SSL_F_TLS1_CERT_VERIFY_MAC                       286
# define SSL_F_TLS1_CHANGE_CIPHER_STATE                   209
# define SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT              274
# define SSL_F_TLS1_ENC                                   210
# define SSL_F_TLS1_EXPORT_KEYING_MATERIAL                314
# define SSL_F_TLS1_GET_CURVELIST                         338
# define SSL_F_TLS1_HEARTBEAT                             315
# define SSL_F_TLS1_PREPARE_CLIENTHELLO_TLSEXT            275
# define SSL_F_TLS1_PREPARE_SERVERHELLO_TLSEXT            276
# define SSL_F_TLS1_PRF                                   284
# define SSL_F_TLS1_PROCESS_HEARTBEAT                     341
# define SSL_F_TLS1_SETUP_KEY_BLOCK                       211
# define SSL_F_TLS1_SET_SERVER_SIGALGS                    335

/* Reason codes. */
# define SSL_R_APP_DATA_IN_HANDSHAKE                      100
# define SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT 272
# define SSL_R_BAD_ALERT_RECORD                           101
# define SSL_R_BAD_CHANGE_CIPHER_SPEC                     103
# define SSL_R_BAD_DATA                                   390
# define SSL_R_BAD_DATA_RETURNED_BY_CALLBACK              106
# define SSL_R_BAD_DECOMPRESSION                          107
# define SSL_R_BAD_DH_G_LENGTH                            108
# define SSL_R_BAD_DH_PUB_KEY_LENGTH                      109
# define SSL_R_BAD_DH_P_LENGTH                            110
# define SSL_R_BAD_DIGEST_LENGTH                          111
# define SSL_R_BAD_DSA_SIGNATURE                          112
# define SSL_R_BAD_ECC_CERT                               304
# define SSL_R_BAD_ECDSA_SIGNATURE                        305
# define SSL_R_BAD_ECPOINT                                306
# define SSL_R_BAD_HANDSHAKE_LENGTH                       332
# define SSL_R_BAD_HELLO_REQUEST                          105
# define SSL_R_BAD_LENGTH                                 271
# define SSL_R_BAD_MAC_LENGTH                             333
# define SSL_R_BAD_MESSAGE_TYPE                           114
# define SSL_R_BAD_PACKET_LENGTH                          115
# define SSL_R_BAD_PROTOCOL_VERSION_NUMBER                116
# define SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH               316
# define SSL_R_BAD_RSA_DECRYPT                            118
# define SSL_R_BAD_RSA_ENCRYPT                            119
# define SSL_R_BAD_RSA_E_LENGTH                           120
# define SSL_R_BAD_RSA_MODULUS_LENGTH                     121
# define SSL_R_BAD_RSA_SIGNATURE                          122
# define SSL_R_BAD_SIGNATURE                              123
# define SSL_R_BAD_SRP_A_LENGTH                           347
# define SSL_R_BAD_SRP_B_LENGTH                           348
# define SSL_R_BAD_SRP_G_LENGTH                           349
# define SSL_R_BAD_SRP_N_LENGTH                           350
# define SSL_R_BAD_SRP_PARAMETERS                         371
# define SSL_R_BAD_SRP_S_LENGTH                           351
# define SSL_R_BAD_SRTP_MKI_VALUE                         352
# define SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST           353
# define SSL_R_BAD_SSL_FILETYPE                           124
# define SSL_R_BAD_VALUE                                  384
# define SSL_R_BAD_WRITE_RETRY                            127
# define SSL_R_BIO_NOT_SET                                128
# define SSL_R_BLOCK_CIPHER_PAD_IS_WRONG                  129
# define SSL_R_BN_LIB                                     130
# define SSL_R_CA_DN_LENGTH_MISMATCH                      131
# define SSL_R_CA_DN_TOO_LONG                             132
# define SSL_R_CA_KEY_TOO_SMALL                           397
# define SSL_R_CA_MD_TOO_WEAK                             398
# define SSL_R_CCS_RECEIVED_EARLY                         133
# define SSL_R_CERTIFICATE_VERIFY_FAILED                  134
# define SSL_R_CERT_CB_ERROR                              377
# define SSL_R_CERT_LENGTH_MISMATCH                       135
# define SSL_R_CIPHER_CODE_WRONG_LENGTH                   137
# define SSL_R_CIPHER_OR_HASH_UNAVAILABLE                 138
# define SSL_R_CLIENTHELLO_TLSEXT                         226
# define SSL_R_COMPRESSED_LENGTH_TOO_LONG                 140
# define SSL_R_COMPRESSION_DISABLED                       343
# define SSL_R_COMPRESSION_FAILURE                        141
# define SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE    307
# define SSL_R_COMPRESSION_LIBRARY_ERROR                  142
# define SSL_R_CONNECTION_TYPE_NOT_SET                    144
# define SSL_R_COOKIE_MISMATCH                            308
# define SSL_R_DATA_BETWEEN_CCS_AND_FINISHED              145
# define SSL_R_DATA_LENGTH_TOO_LONG                       146
# define SSL_R_DECRYPTION_FAILED                          147
# define SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC        281
# define SSL_R_DH_KEY_TOO_SMALL                           394
# define SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG            148
# define SSL_R_DIGEST_CHECK_FAILED                        149
# define SSL_R_DTLS_MESSAGE_TOO_BIG                       334
# define SSL_R_DUPLICATE_COMPRESSION_ID                   309
# define SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT             317
# define SSL_R_ECC_CERT_NOT_FOR_SIGNING                   318
# define SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE         322
# define SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE        323
# define SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE              374
# define SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER               310
# define SSL_R_EE_KEY_TOO_SMALL                           399
# define SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST         354
# define SSL_R_ENCRYPTED_LENGTH_TOO_LONG                  150
# define SSL_R_ERROR_GENERATING_TMP_RSA_KEY               282
# define SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST              151
# define SSL_R_EXCESSIVE_MESSAGE_SIZE                     152
# define SSL_R_EXTRA_DATA_IN_MESSAGE                      153
# define SSL_R_GOT_A_FIN_BEFORE_A_CCS                     154
# define SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS                355
# define SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION           356
# define SSL_R_HTTPS_PROXY_REQUEST                        155
# define SSL_R_HTTP_REQUEST                               156
# define SSL_R_ILLEGAL_SUITEB_DIGEST                      380
# define SSL_R_INAPPROPRIATE_FALLBACK                     373
# define SSL_R_INCONSISTENT_COMPRESSION                   340
# define SSL_R_INVALID_COMMAND                            280
# define SSL_R_INVALID_COMPRESSION_ALGORITHM              341
# define SSL_R_INVALID_NULL_CMD_NAME                      385
# define SSL_R_INVALID_PURPOSE                            278
# define SSL_R_INVALID_SERVERINFO_DATA                    388
# define SSL_R_INVALID_SRP_USERNAME                       357
# define SSL_R_INVALID_STATUS_RESPONSE                    328
# define SSL_R_INVALID_TICKET_KEYS_LENGTH                 325
# define SSL_R_INVALID_TRUST                              279
# define SSL_R_KRB5                                       285
# define SSL_R_KRB5_C_CC_PRINC                            286
# define SSL_R_KRB5_C_GET_CRED                            287
# define SSL_R_KRB5_C_INIT                                288
# define SSL_R_KRB5_C_MK_REQ                              289
# define SSL_R_KRB5_S_BAD_TICKET                          290
# define SSL_R_KRB5_S_INIT                                291
# define SSL_R_KRB5_S_RD_REQ                              292
# define SSL_R_KRB5_S_TKT_EXPIRED                         293
# define SSL_R_KRB5_S_TKT_NYV                             294
# define SSL_R_KRB5_S_TKT_SKEW                            295
# define SSL_R_LENGTH_MISMATCH                            159
# define SSL_R_LENGTH_TOO_SHORT                           160
# define SSL_R_LIBRARY_BUG                                274
# define SSL_R_LIBRARY_HAS_NO_CIPHERS                     161
# define SSL_R_MISSING_DH_DSA_CERT                        162
# define SSL_R_MISSING_DH_KEY                             163
# define SSL_R_MISSING_DH_RSA_CERT                        164
# define SSL_R_MISSING_DSA_SIGNING_CERT                   165
# define SSL_R_MISSING_ECDH_CERT                          382
# define SSL_R_MISSING_ECDSA_SIGNING_CERT                 381
# define SSL_R_MISSING_EXPORT_TMP_DH_KEY                  166
# define SSL_R_MISSING_EXPORT_TMP_RSA_KEY                 167
# define SSL_R_MISSING_RSA_CERTIFICATE                    168
# define SSL_R_MISSING_RSA_ENCRYPTING_CERT                169
# define SSL_R_MISSING_RSA_SIGNING_CERT                   170
# define SSL_R_MISSING_SRP_PARAM                          358
# define SSL_R_MISSING_TMP_DH_KEY                         171
# define SSL_R_MISSING_TMP_ECDH_KEY                       311
# define SSL_R_MISSING_TMP_RSA_KEY                        172
# define SSL_R_MISSING_TMP_RSA_PKEY                       173
# define SSL_R_MISSING_VERIFY_MESSAGE                     174
# define SSL_R_MULTIPLE_SGC_RESTARTS                      346
# define SSL_R_NO_CERTIFICATES_RETURNED                   176
# define SSL_R_NO_CERTIFICATE_ASSIGNED                    177
# define SSL_R_NO_CERTIFICATE_RETURNED                    178
# define SSL_R_NO_CERTIFICATE_SET                         179
# define SSL_R_NO_CIPHERS_AVAILABLE                       181
# define SSL_R_NO_CIPHERS_PASSED                          182
# define SSL_R_NO_CIPHERS_SPECIFIED                       183
# define SSL_R_NO_CIPHER_MATCH                            185
# define SSL_R_NO_CLIENT_CERT_METHOD                      331
# define SSL_R_NO_CLIENT_CERT_RECEIVED                    186
# define SSL_R_NO_COMPRESSION_SPECIFIED                   187
# define SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER           330
# define SSL_R_NO_METHOD_SPECIFIED                        188
# define SSL_R_NO_PEM_EXTENSIONS                          389
# define SSL_R_NO_PRIVATE_KEY_ASSIGNED                    190
# define SSL_R_NO_PROTOCOLS_AVAILABLE                     191
# define SSL_R_NO_RENEGOTIATION                           339
# define SSL_R_NO_REQUIRED_DIGEST                         324
# define SSL_R_NO_SHARED_CIPHER                           193
# define SSL_R_NO_SHARED_SIGATURE_ALGORITHMS              376
# define SSL_R_NO_SRTP_PROFILES                           359
# define SSL_R_NO_VERIFY_CALLBACK                         194
# define SSL_R_NULL_SSL_CTX                               195
# define SSL_R_NULL_SSL_METHOD_PASSED                     196
# define SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED            197
# define SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED 344
# define SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE       387
# define SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE        379
# define SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE              297
# define SSL_R_OPAQUE_PRF_INPUT_TOO_LONG                  327
# define SSL_R_PACKET_LENGTH_TOO_LONG                     198
# define SSL_R_PARSE_TLSEXT                               227
# define SSL_R_PATH_TOO_LONG                              270
# define SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE          199
# define SSL_R_PEM_NAME_BAD_PREFIX                        391
# define SSL_R_PEM_NAME_TOO_SHORT                         392
# define SSL_R_PRE_MAC_LENGTH_TOO_LONG                    205
# define SSL_R_PROTOCOL_IS_SHUTDOWN                       207
# define SSL_R_PSK_IDENTITY_NOT_FOUND                     223
# define SSL_R_PSK_NO_CLIENT_CB                           224
# define SSL_R_PSK_NO_SERVER_CB                           225
# define SSL_R_READ_BIO_NOT_SET                           211
# define SSL_R_READ_TIMEOUT_EXPIRED                       312
# define SSL_R_RECORD_LENGTH_MISMATCH                     213
# define SSL_R_RECORD_TOO_LARGE                           214
# define SSL_R_RECORD_TOO_SMALL                           298
# define SSL_R_RENEGOTIATE_EXT_TOO_LONG                   335
# define SSL_R_RENEGOTIATION_ENCODING_ERR                 336
# define SSL_R_RENEGOTIATION_MISMATCH                     337
# define SSL_R_REQUIRED_CIPHER_MISSING                    215
# define SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING    342
# define SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING           345
# define SSL_R_SERVERHELLO_TLSEXT                         275
# define SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED           277
# define SSL_R_SIGNATURE_ALGORITHMS_ERROR                 360
# define SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE      220
# define SSL_R_SRP_A_CALC                                 361
# define SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES           362
# define SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG      363
# define SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE            364
# define SSL_R_SSL23_DOING_SESSION_ID_REUSE               221
# define SSL_R_SSL3_EXT_INVALID_ECPOINTFORMAT             321
# define SSL_R_SSL3_EXT_INVALID_SERVERNAME                319
# define SSL_R_SSL3_EXT_INVALID_SERVERNAME_TYPE           320
# define SSL_R_SSL3_SESSION_ID_TOO_LONG                   300
# define SSL_R_SSL3_SESSION_ID_TOO_SHORT                  222
# define SSL_R_SSLV3_ALERT_BAD_CERTIFICATE                1042
# define SSL_R_SSLV3_ALERT_BAD_RECORD_MAC                 1020
# define SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED            1045
# define SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED            1044
# define SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN            1046
# define SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE          1030
# define SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE              1040
# define SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER              1047
# define SSL_R_SSLV3_ALERT_NO_CERTIFICATE                 1041
# define SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE             1010
# define SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE        1043
# define SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION         228
# define SSL_R_SSL_HANDSHAKE_FAILURE                      229
# define SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS                 230
# define SSL_R_SSL_NEGATIVE_LENGTH                        372
# define SSL_R_SSL_SESSION_ID_CALLBACK_FAILED             301
# define SSL_R_SSL_SESSION_ID_CONFLICT                    302
# define SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG            273
# define SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH              303
# define SSL_R_TLSV1_ALERT_ACCESS_DENIED                  1049
# define SSL_R_TLSV1_ALERT_DECODE_ERROR                   1050
# define SSL_R_TLSV1_ALERT_DECRYPTION_FAILED              1021
# define SSL_R_TLSV1_ALERT_DECRYPT_ERROR                  1051
# define SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION             1060
# define SSL_R_TLSV1_ALERT_INAPPROPRIATE_FALLBACK         1086
# define SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY          1071
# define SSL_R_TLSV1_ALERT_INTERNAL_ERROR                 1080
# define SSL_R_TLSV1_ALERT_NO_RENEGOTIATION               1100
# define SSL_R_TLSV1_ALERT_PROTOCOL_VERSION               1070
# define SSL_R_TLSV1_ALERT_RECORD_OVERFLOW                1022
# define SSL_R_TLSV1_ALERT_UNKNOWN_CA                     1048
# define SSL_R_TLSV1_ALERT_USER_CANCELLED                 1090
# define SSL_R_TLSV1_BAD_CERTIFICATE_HASH_VALUE           1114
# define SSL_R_TLSV1_BAD_CERTIFICATE_STATUS_RESPONSE      1113
# define SSL_R_TLSV1_CERTIFICATE_UNOBTAINABLE             1111
# define SSL_R_TLSV1_UNRECOGNIZED_NAME                    1112
# define SSL_R_TLSV1_UNSUPPORTED_EXTENSION                1110
# define SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER       232
# define SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT           365
# define SSL_R_TLS_HEARTBEAT_PENDING                      366
# define SSL_R_TLS_ILLEGAL_EXPORTER_LABEL                 367
# define SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST             157
# define SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST 233
# define SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG    234
# define SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER            235
# define SSL_R_UNABLE_TO_DECODE_DH_CERTS                  236
# define SSL_R_UNABLE_TO_DECODE_ECDH_CERTS                313
# define SSL_R_UNABLE_TO_FIND_DH_PARAMETERS               238
# define SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS             314
# define SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS       239
# define SSL_R_UNABLE_TO_FIND_SSL_METHOD                  240
# define SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES           242
# define SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES          243
# define SSL_R_UNEXPECTED_MESSAGE                         244
# define SSL_R_UNEXPECTED_RECORD                          245
# define SSL_R_UNINITIALIZED                              276
# define SSL_R_UNKNOWN_ALERT_TYPE                         246
# define SSL_R_UNKNOWN_CERTIFICATE_TYPE                   247
# define SSL_R_UNKNOWN_CIPHER_RETURNED                    248
# define SSL_R_UNKNOWN_CIPHER_TYPE                        249
# define SSL_R_UNKNOWN_CMD_NAME                           386
# define SSL_R_UNKNOWN_DIGEST                             368
# define SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE                  250
# define SSL_R_UNKNOWN_PKEY_TYPE                          251
# define SSL_R_UNKNOWN_PROTOCOL                           252
# define SSL_R_UNKNOWN_REMOTE_ERROR_TYPE                  253
# define SSL_R_UNKNOWN_SSL_VERSION                        254
# define SSL_R_UNKNOWN_STATE                              255
# define SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED       338
# define SSL_R_UNSUPPORTED_CIPHER                         256
# define SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM          257
# define SSL_R_UNSUPPORTED_DIGEST_TYPE                    326
# define SSL_R_UNSUPPORTED_ELLIPTIC_CURVE                 315
# define SSL_R_UNSUPPORTED_PROTOCOL                       258
# define SSL_R_UNSUPPORTED_SSL_VERSION                    259
# define SSL_R_UNSUPPORTED_STATUS_TYPE                    329
# define SSL_R_USE_SRTP_NOT_NEGOTIATED                    369
# define SSL_R_VERSION_TOO_LOW                            396
# define SSL_R_WRONG_CERTIFICATE_TYPE                     383
# define SSL_R_WRONG_CIPHER_RETURNED                      261
# define SSL_R_WRONG_CURVE                                378
# define SSL_R_WRONG_MESSAGE_TYPE                         262
# define SSL_R_WRONG_SIGNATURE_LENGTH                     264
# define SSL_R_WRONG_SIGNATURE_SIZE                       265
# define SSL_R_WRONG_SIGNATURE_TYPE                       370
# define SSL_R_WRONG_SSL_VERSION                          266
# define SSL_R_WRONG_VERSION_NUMBER                       267
# define SSL_R_X509_LIB                                   268
# define SSL_R_X509_VERIFICATION_SETUP_PROBLEMS           269

#ifdef  __cplusplus
}
#endif
#endif