[thirdparty/openssl.git] / test / ssltest.c

/* ssl/ssltest.c */
/* 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) 1998-2000 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.
 */

/* Or gethostname won't be declared properly on Linux and GNU platforms. */
#define _BSD_SOURCE 1

#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#define USE_SOCKETS
#include "e_os.h"

#ifdef OPENSSL_SYS_VMS
/*
 * Or isascii won't be declared properly on VMS (at least with DECompHP C).
 */
# define _XOPEN_SOURCE 500
#endif

#include <ctype.h>

#include <openssl/bio.h>
#include <openssl/crypto.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/ssl.h>
#ifndef OPENSSL_NO_ENGINE
# include <openssl/engine.h>
#endif
#include <openssl/err.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_DH
# include <openssl/dh.h>
#endif
#ifndef OPENSSL_NO_SRP
# include <openssl/srp.h>
#endif
#include <openssl/bn.h>

#include "../ssl/ssl_locl.h"

/*
 * Or gethostname won't be declared properly
 * on Compaq platforms (at least with DEC C).
 * Do not try to put it earlier, or IPv6 includes
 * get screwed...
 */
#define _XOPEN_SOURCE_EXTENDED  1

#ifdef OPENSSL_SYS_WINDOWS
# include <winsock.h>
#else
# include OPENSSL_UNISTD
#endif

#ifdef OPENSSL_SYS_VMS
# define TEST_SERVER_CERT "SYS$DISK:[-.APPS]SERVER.PEM"
# define TEST_CLIENT_CERT "SYS$DISK:[-.APPS]CLIENT.PEM"
#elif defined(OPENSSL_SYS_WINCE)
# define TEST_SERVER_CERT "\\OpenSSL\\server.pem"
# define TEST_CLIENT_CERT "\\OpenSSL\\client.pem"
#elif defined(OPENSSL_SYS_NETWARE)
# define TEST_SERVER_CERT "\\openssl\\apps\\server.pem"
# define TEST_CLIENT_CERT "\\openssl\\apps\\client.pem"
#else
# define TEST_SERVER_CERT "../apps/server.pem"
# define TEST_CLIENT_CERT "../apps/client.pem"
#endif

/*
 * There is really no standard for this, so let's assign some tentative
 * numbers.  In any case, these numbers are only for this test
 */
#define COMP_RLE        255
#define COMP_ZLIB       1

static int verify_callback(int ok, X509_STORE_CTX *ctx);
#ifndef OPENSSL_NO_RSA
static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength);
static void free_tmp_rsa(void);
#endif
static int app_verify_callback(X509_STORE_CTX *ctx, void *arg);
#define APP_CALLBACK_STRING "Test Callback Argument"
struct app_verify_arg {
    char *string;
    int app_verify;
    int allow_proxy_certs;
    char *proxy_auth;
    char *proxy_cond;
};

#ifndef OPENSSL_NO_DH
static DH *get_dh512(void);
static DH *get_dh1024(void);
static DH *get_dh1024dsa(void);
#endif

static char *psk_key = NULL;    /* by default PSK is not used */
#ifndef OPENSSL_NO_PSK
static 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);
static unsigned int psk_server_callback(SSL *ssl, const char *identity,
                                        unsigned char *psk,
                                        unsigned int max_psk_len);
#endif

#ifndef OPENSSL_NO_SRP
/* SRP client */
/* This is a context that we pass to all callbacks */
typedef struct srp_client_arg_st {
    char *srppassin;
    char *srplogin;
} SRP_CLIENT_ARG;

# define PWD_STRLEN 1024

static char *ssl_give_srp_client_pwd_cb(SSL *s, void *arg)
{
    SRP_CLIENT_ARG *srp_client_arg = (SRP_CLIENT_ARG *)arg;
    return BUF_strdup((char *)srp_client_arg->srppassin);
}

/* SRP server */
/* This is a context that we pass to SRP server callbacks */
typedef struct srp_server_arg_st {
    char *expected_user;
    char *pass;
} SRP_SERVER_ARG;

static int ssl_srp_server_param_cb(SSL *s, int *ad, void *arg)
{
    SRP_SERVER_ARG *p = (SRP_SERVER_ARG *)arg;

    if (strcmp(p->expected_user, SSL_get_srp_username(s)) != 0) {
        fprintf(stderr, "User %s doesn't exist\n", SSL_get_srp_username(s));
        return SSL3_AL_FATAL;
    }
    if (SSL_set_srp_server_param_pw(s, p->expected_user, p->pass, "1024") < 0) {
        *ad = SSL_AD_INTERNAL_ERROR;
        return SSL3_AL_FATAL;
    }
    return SSL_ERROR_NONE;
}
#endif

static BIO *bio_err = NULL;
static BIO *bio_stdout = NULL;

#ifndef OPENSSL_NO_NEXTPROTONEG
/* Note that this code assumes that this is only a one element list: */
static const char NEXT_PROTO_STRING[] = "\x09testproto";
int npn_client = 0;
int npn_server = 0;
int npn_server_reject = 0;

static int cb_client_npn(SSL *s, unsigned char **out, unsigned char *outlen,
                         const unsigned char *in, unsigned int inlen,
                         void *arg)
{
    /*
     * This callback only returns the protocol string, rather than a length
     * prefixed set. We assume that NEXT_PROTO_STRING is a one element list
     * and remove the first byte to chop off the length prefix.
     */
    *out = (unsigned char *)NEXT_PROTO_STRING + 1;
    *outlen = sizeof(NEXT_PROTO_STRING) - 2;
    return SSL_TLSEXT_ERR_OK;
}

static int cb_server_npn(SSL *s, const unsigned char **data,
                         unsigned int *len, void *arg)
{
    *data = (const unsigned char *)NEXT_PROTO_STRING;
    *len = sizeof(NEXT_PROTO_STRING) - 1;
    return SSL_TLSEXT_ERR_OK;
}

static int cb_server_rejects_npn(SSL *s, const unsigned char **data,
                                 unsigned int *len, void *arg)
{
    return SSL_TLSEXT_ERR_NOACK;
}

static int verify_npn(SSL *client, SSL *server)
{
    const unsigned char *client_s;
    unsigned client_len;
    const unsigned char *server_s;
    unsigned server_len;

    SSL_get0_next_proto_negotiated(client, &client_s, &client_len);
    SSL_get0_next_proto_negotiated(server, &server_s, &server_len);

    if (client_len) {
        BIO_printf(bio_stdout, "Client NPN: ");
        BIO_write(bio_stdout, client_s, client_len);
        BIO_printf(bio_stdout, "\n");
    }

    if (server_len) {
        BIO_printf(bio_stdout, "Server NPN: ");
        BIO_write(bio_stdout, server_s, server_len);
        BIO_printf(bio_stdout, "\n");
    }

    /*
     * If an NPN string was returned, it must be the protocol that we
     * expected to negotiate.
     */
    if (client_len && (client_len != sizeof(NEXT_PROTO_STRING) - 2 ||
                       memcmp(client_s, NEXT_PROTO_STRING + 1, client_len)))
        return -1;
    if (server_len && (server_len != sizeof(NEXT_PROTO_STRING) - 2 ||
                       memcmp(server_s, NEXT_PROTO_STRING + 1, server_len)))
        return -1;

    if (!npn_client && client_len)
        return -1;
    if (!npn_server && server_len)
        return -1;
    if (npn_server_reject && server_len)
        return -1;
    if (npn_client && npn_server && (!client_len || !server_len))
        return -1;

    return 0;
}
#endif

static const char *alpn_client;
static const char *alpn_server;
static const char *alpn_expected;
static unsigned char *alpn_selected;

/*-
 * next_protos_parse parses a comma separated list of strings into a string
 * in a format suitable for passing to SSL_CTX_set_next_protos_advertised.
 *   outlen: (output) set to the length of the resulting buffer on success.
 *   err: (maybe NULL) on failure, an error message line is written to this BIO.
 *   in: a NUL terminated string like "abc,def,ghi"
 *
 *   returns: a malloced buffer or NULL on failure.
 */
static unsigned char *next_protos_parse(unsigned short *outlen,
                                        const char *in)
{
    size_t len;
    unsigned char *out;
    size_t i, start = 0;

    len = strlen(in);
    if (len >= 65535)
        return NULL;

    out = OPENSSL_malloc(strlen(in) + 1);
    if (!out)
        return NULL;

    for (i = 0; i <= len; ++i) {
        if (i == len || in[i] == ',') {
            if (i - start > 255) {
                OPENSSL_free(out);
                return NULL;
            }
            out[start] = i - start;
            start = i + 1;
        } else
            out[i + 1] = in[i];
    }

    *outlen = len + 1;
    return out;
}

static int cb_server_alpn(SSL *s, const unsigned char **out,
                          unsigned char *outlen, const unsigned char *in,
                          unsigned int inlen, void *arg)
{
    unsigned char *protos;
    unsigned short protos_len;

    protos = next_protos_parse(&protos_len, alpn_server);
    if (protos == NULL) {
        fprintf(stderr, "failed to parser ALPN server protocol string: %s\n",
                alpn_server);
        abort();
    }

    if (SSL_select_next_proto
        ((unsigned char **)out, outlen, protos, protos_len, in,
         inlen) != OPENSSL_NPN_NEGOTIATED) {
        OPENSSL_free(protos);
        return SSL_TLSEXT_ERR_NOACK;
    }

    /*
     * Make a copy of the selected protocol which will be freed in
     * verify_alpn.
     */
    alpn_selected = OPENSSL_malloc(*outlen);
    memcpy(alpn_selected, *out, *outlen);
    *out = alpn_selected;

    OPENSSL_free(protos);
    return SSL_TLSEXT_ERR_OK;
}

static int verify_alpn(SSL *client, SSL *server)
{
    const unsigned char *client_proto, *server_proto;
    unsigned int client_proto_len = 0, server_proto_len = 0;
    SSL_get0_alpn_selected(client, &client_proto, &client_proto_len);
    SSL_get0_alpn_selected(server, &server_proto, &server_proto_len);

    if (alpn_selected != NULL) {
        OPENSSL_free(alpn_selected);
        alpn_selected = NULL;
    }

    if (client_proto_len != server_proto_len ||
        memcmp(client_proto, server_proto, client_proto_len) != 0) {
        BIO_printf(bio_stdout, "ALPN selected protocols differ!\n");
        goto err;
    }

    if (client_proto_len > 0 && alpn_expected == NULL) {
        BIO_printf(bio_stdout, "ALPN unexpectedly negotiated\n");
        goto err;
    }

    if (alpn_expected != NULL &&
        (client_proto_len != strlen(alpn_expected) ||
         memcmp(client_proto, alpn_expected, client_proto_len) != 0)) {
        BIO_printf(bio_stdout,
                   "ALPN selected protocols not equal to expected protocol: %s\n",
                   alpn_expected);
        goto err;
    }

    return 0;

 err:
    BIO_printf(bio_stdout, "ALPN results: client: '");
    BIO_write(bio_stdout, client_proto, client_proto_len);
    BIO_printf(bio_stdout, "', server: '");
    BIO_write(bio_stdout, server_proto, server_proto_len);
    BIO_printf(bio_stdout, "'\n");
    BIO_printf(bio_stdout, "ALPN configured: client: '%s', server: '%s'\n",
               alpn_client, alpn_server);
    return -1;
}

#define SCT_EXT_TYPE 18

/*
 * WARNING : below extension types are *NOT* IETF assigned, and could
 * conflict if these types are reassigned and handled specially by OpenSSL
 * in the future
 */
#define TACK_EXT_TYPE 62208
#define CUSTOM_EXT_TYPE_0 1000
#define CUSTOM_EXT_TYPE_1 1001
#define CUSTOM_EXT_TYPE_2 1002
#define CUSTOM_EXT_TYPE_3 1003

const char custom_ext_cli_string[] = "abc";
const char custom_ext_srv_string[] = "defg";

/* These set from cmdline */
char *serverinfo_file = NULL;
int serverinfo_sct = 0;
int serverinfo_tack = 0;

/* These set based on extension callbacks */
int serverinfo_sct_seen = 0;
int serverinfo_tack_seen = 0;
int serverinfo_other_seen = 0;

/* This set from cmdline */
int custom_ext = 0;

/* This set based on extension callbacks */
int custom_ext_error = 0;

static int serverinfo_cli_parse_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char *in, size_t inlen,
                                   int *al, void *arg)
{
    if (ext_type == SCT_EXT_TYPE)
        serverinfo_sct_seen++;
    else if (ext_type == TACK_EXT_TYPE)
        serverinfo_tack_seen++;
    else
        serverinfo_other_seen++;
    return 1;
}

static int verify_serverinfo()
{
    if (serverinfo_sct != serverinfo_sct_seen)
        return -1;
    if (serverinfo_tack != serverinfo_tack_seen)
        return -1;
    if (serverinfo_other_seen)
        return -1;
    return 0;
}

/*-
 * Four test cases for custom extensions:
 * 0 - no ClientHello extension or ServerHello response
 * 1 - ClientHello with "abc", no response
 * 2 - ClientHello with "abc", empty response
 * 3 - ClientHello with "abc", "defg" response
 */

static int custom_ext_0_cli_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_0)
        custom_ext_error = 1;
    return 0;                   /* Don't send an extension */
}

static int custom_ext_0_cli_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    return 1;
}

static int custom_ext_1_cli_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_1)
        custom_ext_error = 1;
    *out = (const unsigned char *)custom_ext_cli_string;
    *outlen = strlen(custom_ext_cli_string);
    return 1;                   /* Send "abc" */
}

static int custom_ext_1_cli_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    return 1;
}

static int custom_ext_2_cli_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_2)
        custom_ext_error = 1;
    *out = (const unsigned char *)custom_ext_cli_string;
    *outlen = strlen(custom_ext_cli_string);
    return 1;                   /* Send "abc" */
}

static int custom_ext_2_cli_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_2)
        custom_ext_error = 1;
    if (inlen != 0)
        custom_ext_error = 1;   /* Should be empty response */
    return 1;
}

static int custom_ext_3_cli_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_3)
        custom_ext_error = 1;
    *out = (const unsigned char *)custom_ext_cli_string;
    *outlen = strlen(custom_ext_cli_string);
    return 1;                   /* Send "abc" */
}

static int custom_ext_3_cli_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_3)
        custom_ext_error = 1;
    if (inlen != strlen(custom_ext_srv_string))
        custom_ext_error = 1;
    if (memcmp(custom_ext_srv_string, in, inlen) != 0)
        custom_ext_error = 1;   /* Check for "defg" */
    return 1;
}

/*
 * custom_ext_0_cli_add_cb returns 0 - the server won't receive a callback
 * for this extension
 */
static int custom_ext_0_srv_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    custom_ext_error = 1;
    return 1;
}

/* 'add' callbacks are only called if the 'parse' callback is called */
static int custom_ext_0_srv_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    /* Error: should not have been called */
    custom_ext_error = 1;
    return 0;                   /* Don't send an extension */
}

static int custom_ext_1_srv_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_1)
        custom_ext_error = 1;
    /* Check for "abc" */
    if (inlen != strlen(custom_ext_cli_string))
        custom_ext_error = 1;
    if (memcmp(in, custom_ext_cli_string, inlen) != 0)
        custom_ext_error = 1;
    return 1;
}

static int custom_ext_1_srv_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    return 0;                   /* Don't send an extension */
}

static int custom_ext_2_srv_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_2)
        custom_ext_error = 1;
    /* Check for "abc" */
    if (inlen != strlen(custom_ext_cli_string))
        custom_ext_error = 1;
    if (memcmp(in, custom_ext_cli_string, inlen) != 0)
        custom_ext_error = 1;
    return 1;
}

static int custom_ext_2_srv_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    *out = NULL;
    *outlen = 0;
    return 1;                   /* Send empty extension */
}

static int custom_ext_3_srv_parse_cb(SSL *s, unsigned int ext_type,
                                     const unsigned char *in,
                                     size_t inlen, int *al, void *arg)
{
    if (ext_type != CUSTOM_EXT_TYPE_3)
        custom_ext_error = 1;
    /* Check for "abc" */
    if (inlen != strlen(custom_ext_cli_string))
        custom_ext_error = 1;
    if (memcmp(in, custom_ext_cli_string, inlen) != 0)
        custom_ext_error = 1;
    return 1;
}

static int custom_ext_3_srv_add_cb(SSL *s, unsigned int ext_type,
                                   const unsigned char **out,
                                   size_t *outlen, int *al, void *arg)
{
    *out = (const unsigned char *)custom_ext_srv_string;
    *outlen = strlen(custom_ext_srv_string);
    return 1;                   /* Send "defg" */
}

static char *cipher = NULL;
static int verbose = 0;
static int debug = 0;
static const char rnd_seed[] =
    "string to make the random number generator think it has entropy";

int doit_biopair(SSL *s_ssl, SSL *c_ssl, long bytes, clock_t *s_time,
                 clock_t *c_time);
int doit(SSL *s_ssl, SSL *c_ssl, long bytes);
static int do_test_cipherlist(void);

static void sv_usage(void)
{
    fprintf(stderr, "usage: ssltest [args ...]\n");
    fprintf(stderr, "\n");
#ifdef OPENSSL_FIPS
    fprintf(stderr, "-F             - run test in FIPS mode\n");
#endif
    fprintf(stderr, " -server_auth  - check server certificate\n");
    fprintf(stderr, " -client_auth  - do client authentication\n");
    fprintf(stderr, " -proxy        - allow proxy certificates\n");
    fprintf(stderr, " -proxy_auth <val> - set proxy policy rights\n");
    fprintf(stderr,
            " -proxy_cond <val> - expression to test proxy policy rights\n");
    fprintf(stderr, " -v            - more output\n");
    fprintf(stderr, " -d            - debug output\n");
    fprintf(stderr, " -reuse        - use session-id reuse\n");
    fprintf(stderr, " -num <val>    - number of connections to perform\n");
    fprintf(stderr,
            " -bytes <val>  - number of bytes to swap between client/server\n");
#ifndef OPENSSL_NO_DH
    fprintf(stderr,
            " -dhe1024      - use 1024 bit key (safe prime) for DHE\n");
    fprintf(stderr,
            " -dhe1024dsa   - use 1024 bit key (with 160-bit subprime) for DHE\n");
    fprintf(stderr, " -no_dhe       - disable DHE\n");
#endif
#ifndef OPENSSL_NO_EC
    fprintf(stderr, " -no_ecdhe     - disable ECDHE\n");
#endif
#ifndef OPENSSL_NO_PSK
    fprintf(stderr, " -psk arg      - PSK in hex (without 0x)\n");
#endif
#ifndef OPENSSL_NO_SRP
    fprintf(stderr, " -srpuser user  - SRP username to use\n");
    fprintf(stderr, " -srppass arg   - password for 'user'\n");
#endif
#ifndef OPENSSL_NO_SSL3_METHOD
    fprintf(stderr, " -ssl3         - use SSLv3\n");
#endif
    fprintf(stderr, " -tls1         - use TLSv1\n");
#ifndef OPENSSL_NO_DTLS
    fprintf(stderr, " -dtls1        - use DTLSv1\n");
    fprintf(stderr, " -dtls12       - use DTLSv1.2\n");
#endif
    fprintf(stderr, " -CApath arg   - PEM format directory of CA's\n");
    fprintf(stderr, " -CAfile arg   - PEM format file of CA's\n");
    fprintf(stderr, " -cert arg     - Server certificate file\n");
    fprintf(stderr,
            " -key arg      - Server key file (default: same as -cert)\n");
    fprintf(stderr, " -c_cert arg   - Client certificate file\n");
    fprintf(stderr,
            " -c_key arg    - Client key file (default: same as -c_cert)\n");
    fprintf(stderr, " -cipher arg   - The cipher list\n");
    fprintf(stderr, " -bio_pair     - Use BIO pairs\n");
    fprintf(stderr, " -f            - Test even cases that can't work\n");
    fprintf(stderr,
            " -time         - measure processor time used by client and server\n");
    fprintf(stderr, " -zlib         - use zlib compression\n");
    fprintf(stderr, " -rle          - use rle compression\n");
#ifndef OPENSSL_NO_EC
    fprintf(stderr,
            " -named_curve arg  - Elliptic curve name to use for ephemeral ECDH keys.\n"
            "                 Use \"openssl ecparam -list_curves\" for all names\n"
            "                 (default is sect163r2).\n");
#endif
    fprintf(stderr,
            " -test_cipherlist - Verifies the order of the ssl cipher lists.\n"
            "                    When this option is requested, the cipherlist\n"
            "                    tests are run instead of handshake tests.\n");
#ifndef OPENSSL_NO_NEXTPROTONEG
    fprintf(stderr, " -npn_client - have client side offer NPN\n");
    fprintf(stderr, " -npn_server - have server side offer NPN\n");
    fprintf(stderr, " -npn_server_reject - have server reject NPN\n");
#endif
    fprintf(stderr, " -serverinfo_file file - have server use this file\n");
    fprintf(stderr, " -serverinfo_sct  - have client offer and expect SCT\n");
    fprintf(stderr,
            " -serverinfo_tack - have client offer and expect TACK\n");
    fprintf(stderr,
            " -custom_ext - try various custom extension callbacks\n");
    fprintf(stderr, " -alpn_client <string> - have client side offer ALPN\n");
    fprintf(stderr, " -alpn_server <string> - have server side offer ALPN\n");
    fprintf(stderr,
            " -alpn_expected <string> - the ALPN protocol that should be negotiated\n");
}

static void print_key_details(BIO *out, EVP_PKEY *key)
{
    int keyid = EVP_PKEY_id(key);
#ifndef OPENSSL_NO_EC
    if (keyid == EVP_PKEY_EC) {
        EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
        int nid;
        const char *cname;
        nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
        EC_KEY_free(ec);
        cname = EC_curve_nid2nist(nid);
        if (!cname)
            cname = OBJ_nid2sn(nid);
        BIO_printf(out, "%d bits EC (%s)", EVP_PKEY_bits(key), cname);
    } else
#endif
    {
        const char *algname;
        switch (keyid) {
        case EVP_PKEY_RSA:
            algname = "RSA";
            break;
        case EVP_PKEY_DSA:
            algname = "DSA";
            break;
        case EVP_PKEY_DH:
            algname = "DH";
            break;
        default:
            algname = OBJ_nid2sn(keyid);
            break;
        }
        BIO_printf(out, "%d bits %s", EVP_PKEY_bits(key), algname);
    }
}

static void print_details(SSL *c_ssl, const char *prefix)
{
    const SSL_CIPHER *ciph;
    int mdnid;
    X509 *cert;
    EVP_PKEY *pkey;

    ciph = SSL_get_current_cipher(c_ssl);
    BIO_printf(bio_stdout, "%s%s, cipher %s %s",
               prefix,
               SSL_get_version(c_ssl),
               SSL_CIPHER_get_version(ciph), SSL_CIPHER_get_name(ciph));
    cert = SSL_get_peer_certificate(c_ssl);
    if (cert != NULL) {
        pkey = X509_get_pubkey(cert);
        if (pkey != NULL) {
            BIO_puts(bio_stdout, ", ");
            print_key_details(bio_stdout, pkey);
            EVP_PKEY_free(pkey);
        }
        X509_free(cert);
    }
    if (SSL_get_server_tmp_key(c_ssl, &pkey)) {
        BIO_puts(bio_stdout, ", temp key: ");
        print_key_details(bio_stdout, pkey);
        EVP_PKEY_free(pkey);
    }
    if (SSL_get_peer_signature_nid(c_ssl, &mdnid))
        BIO_printf(bio_stdout, ", digest=%s", OBJ_nid2sn(mdnid));
    BIO_printf(bio_stdout, "\n");
}

static void lock_dbg_cb(int mode, int type, const char *file, int line)
{
    static int modes[CRYPTO_NUM_LOCKS]; /* = {0, 0, ... } */
    const char *errstr = NULL;
    int rw;

    rw = mode & (CRYPTO_READ | CRYPTO_WRITE);
    if (!((rw == CRYPTO_READ) || (rw == CRYPTO_WRITE))) {
        errstr = "invalid mode";
        goto err;
    }

    if (type < 0 || type >= CRYPTO_NUM_LOCKS) {
        errstr = "type out of bounds";
        goto err;
    }

    if (mode & CRYPTO_LOCK) {
        if (modes[type]) {
            errstr = "already locked";
            /*
             * must not happen in a single-threaded program (would deadlock)
             */
            goto err;
        }

        modes[type] = rw;
    } else if (mode & CRYPTO_UNLOCK) {
        if (!modes[type]) {
            errstr = "not locked";
            goto err;
        }

        if (modes[type] != rw) {
            errstr = (rw == CRYPTO_READ) ?
                "CRYPTO_r_unlock on write lock" :
                "CRYPTO_w_unlock on read lock";
        }

        modes[type] = 0;
    } else {
        errstr = "invalid mode";
        goto err;
    }

 err:
    if (errstr) {
        /* we cannot use bio_err here */
        fprintf(stderr,
                "openssl (lock_dbg_cb): %s (mode=%d, type=%d) at %s:%d\n",
                errstr, mode, type, file, line);
    }
}

int main(int argc, char *argv[])
{
    char *CApath = NULL, *CAfile = NULL;
    int badop = 0;
    int bio_pair = 0;
    int force = 0;
    int dtls1 = 0, dtls12 = 0, tls1 = 0, ssl3 = 0, ret = 1;
    int client_auth = 0;
    int server_auth = 0, i;
    struct app_verify_arg app_verify_arg =
        { APP_CALLBACK_STRING, 0, 0, NULL, NULL };
    char *server_cert = TEST_SERVER_CERT;
    char *server_key = NULL;
    char *client_cert = TEST_CLIENT_CERT;
    char *client_key = NULL;
#ifndef OPENSSL_NO_EC
    char *named_curve = NULL;
#endif
    SSL_CTX *s_ctx = NULL;
    SSL_CTX *c_ctx = NULL;
    const SSL_METHOD *meth = NULL;
    SSL *c_ssl, *s_ssl;
    int number = 1, reuse = 0;
    long bytes = 256L;
#ifndef OPENSSL_NO_DH
    DH *dh;
    int dhe1024 = 0, dhe1024dsa = 0;
#endif
#ifndef OPENSSL_NO_EC
    EC_KEY *ecdh = NULL;
#endif
#ifndef OPENSSL_NO_SRP
    /* client */
    SRP_CLIENT_ARG srp_client_arg = { NULL, NULL };
    /* server */
    SRP_SERVER_ARG srp_server_arg = { NULL, NULL };
#endif
    int no_dhe = 0;
    int no_ecdhe = 0;
    int no_psk = 0;
    int print_time = 0;
    clock_t s_time = 0, c_time = 0;
#ifndef OPENSSL_NO_COMP
    int comp = 0;
    COMP_METHOD *cm = NULL;
    STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
#endif
    int test_cipherlist = 0;
#ifdef OPENSSL_FIPS
    int fips_mode = 0;
#endif
    int no_protocol = 0;
    int n;

    SSL_CONF_CTX *s_cctx = NULL, *c_cctx = NULL;
    STACK_OF(OPENSSL_STRING) *conf_args = NULL;
    const char *arg = NULL, *argn = NULL;

    verbose = 0;
    debug = 0;
    cipher = 0;

    bio_err = BIO_new_fp(stderr, BIO_NOCLOSE | BIO_FP_TEXT);

    CRYPTO_set_locking_callback(lock_dbg_cb);

    /* enable memory leak checking unless explicitly disabled */
    if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL)
          && (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) {
        CRYPTO_malloc_debug_init();
        CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
    } else {
        /* OPENSSL_DEBUG_MEMORY=off */
        CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
    }
    CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);

    RAND_seed(rnd_seed, sizeof rnd_seed);

    bio_stdout = BIO_new_fp(stdout, BIO_NOCLOSE | BIO_FP_TEXT);

    s_cctx = SSL_CONF_CTX_new();
    c_cctx = SSL_CONF_CTX_new();

    if (!s_cctx || !c_cctx) {
        ERR_print_errors(bio_err);
        goto end;
    }

    SSL_CONF_CTX_set_flags(s_cctx,
                           SSL_CONF_FLAG_CMDLINE | SSL_CONF_FLAG_SERVER);
    if (!SSL_CONF_CTX_set1_prefix(s_cctx, "-s_")) {
        ERR_print_errors(bio_err);
        goto end;
    }

    SSL_CONF_CTX_set_flags(c_cctx,
                           SSL_CONF_FLAG_CMDLINE | SSL_CONF_FLAG_CLIENT);
    if (!SSL_CONF_CTX_set1_prefix(c_cctx, "-c_")) {
        ERR_print_errors(bio_err);
        goto end;
    }

    argc--;
    argv++;

    while (argc >= 1) {
        if (!strcmp(*argv, "-F")) {
#ifdef OPENSSL_FIPS
            fips_mode = 1;
#else
            fprintf(stderr,
                    "not compiled with FIPS support, so exiting without running.\n");
            EXIT(0);
#endif
        } else if (strcmp(*argv, "-server_auth") == 0)
            server_auth = 1;
        else if (strcmp(*argv, "-client_auth") == 0)
            client_auth = 1;
        else if (strcmp(*argv, "-proxy_auth") == 0) {
            if (--argc < 1)
                goto bad;
            app_verify_arg.proxy_auth = *(++argv);
        } else if (strcmp(*argv, "-proxy_cond") == 0) {
            if (--argc < 1)
                goto bad;
            app_verify_arg.proxy_cond = *(++argv);
        } else if (strcmp(*argv, "-v") == 0)
            verbose = 1;
        else if (strcmp(*argv, "-d") == 0)
            debug = 1;
        else if (strcmp(*argv, "-reuse") == 0)
            reuse = 1;
        else if (strcmp(*argv, "-dhe1024") == 0) {
#ifndef OPENSSL_NO_DH
            dhe1024 = 1;
#else
            fprintf(stderr,
                    "ignoring -dhe1024, since I'm compiled without DH\n");
#endif
        } else if (strcmp(*argv, "-dhe1024dsa") == 0) {
#ifndef OPENSSL_NO_DH
            dhe1024dsa = 1;
#else
            fprintf(stderr,
                    "ignoring -dhe1024, since I'm compiled without DH\n");
#endif
        } else if (strcmp(*argv, "-no_dhe") == 0)
            no_dhe = 1;
        else if (strcmp(*argv, "-no_ecdhe") == 0)
            no_ecdhe = 1;
        else if (strcmp(*argv, "-psk") == 0) {
            if (--argc < 1)
                goto bad;
            psk_key = *(++argv);
#ifndef OPENSSL_NO_PSK
            if (strspn(psk_key, "abcdefABCDEF1234567890") != strlen(psk_key)) {
                BIO_printf(bio_err, "Not a hex number '%s'\n", *argv);
                goto bad;
            }
#else
            no_psk = 1;
#endif
        }
#ifndef OPENSSL_NO_SRP
        else if (strcmp(*argv, "-srpuser") == 0) {
            if (--argc < 1)
                goto bad;
            srp_server_arg.expected_user = srp_client_arg.srplogin =
                *(++argv);
            tls1 = 1;
        } else if (strcmp(*argv, "-srppass") == 0) {
            if (--argc < 1)
                goto bad;
            srp_server_arg.pass = srp_client_arg.srppassin = *(++argv);
            tls1 = 1;
        }
#endif
        else if (strcmp(*argv, "-tls1") == 0) {
            tls1 = 1;
        } else if (strcmp(*argv, "-ssl3") == 0) {
#ifdef OPENSSL_NO_SSL3_METHOD
            no_protocol = 1;
#endif
            ssl3 = 1;
        } else if (strcmp(*argv, "-dtls1") == 0) {
#ifdef OPENSSL_NO_DTLS
            no_protocol = 1;
#endif
            dtls1 = 1;
        } else if (strcmp(*argv, "-dtls12") == 0) {
#ifdef OPENSSL_NO_DTLS
            no_protocol = 1;
#endif
            dtls12 = 1;
        } else if (strncmp(*argv, "-num", 4) == 0) {
            if (--argc < 1)
                goto bad;
            number = atoi(*(++argv));
            if (number == 0)
                number = 1;
        } else if (strcmp(*argv, "-bytes") == 0) {
            if (--argc < 1)
                goto bad;
            bytes = atol(*(++argv));
            if (bytes == 0L)
                bytes = 1L;
            i = strlen(argv[0]);
            if (argv[0][i - 1] == 'k')
                bytes *= 1024L;
            if (argv[0][i - 1] == 'm')
                bytes *= 1024L * 1024L;
        } else if (strcmp(*argv, "-cert") == 0) {
            if (--argc < 1)
                goto bad;
            server_cert = *(++argv);
        } else if (strcmp(*argv, "-s_cert") == 0) {
            if (--argc < 1)
                goto bad;
            server_cert = *(++argv);
        } else if (strcmp(*argv, "-key") == 0) {
            if (--argc < 1)
                goto bad;
            server_key = *(++argv);
        } else if (strcmp(*argv, "-s_key") == 0) {
            if (--argc < 1)
                goto bad;
            server_key = *(++argv);
        } else if (strcmp(*argv, "-c_cert") == 0) {
            if (--argc < 1)
                goto bad;
            client_cert = *(++argv);
        } else if (strcmp(*argv, "-c_key") == 0) {
            if (--argc < 1)
                goto bad;
            client_key = *(++argv);
        } else if (strcmp(*argv, "-cipher") == 0) {
            if (--argc < 1)
                goto bad;
            cipher = *(++argv);
        } else if (strcmp(*argv, "-CApath") == 0) {
            if (--argc < 1)
                goto bad;
            CApath = *(++argv);
        } else if (strcmp(*argv, "-CAfile") == 0) {
            if (--argc < 1)
                goto bad;
            CAfile = *(++argv);
        } else if (strcmp(*argv, "-bio_pair") == 0) {
            bio_pair = 1;
        } else if (strcmp(*argv, "-f") == 0) {
            force = 1;
        } else if (strcmp(*argv, "-time") == 0) {
            print_time = 1;
        }
#ifndef OPENSSL_NO_COMP
        else if (strcmp(*argv, "-zlib") == 0) {
            comp = COMP_ZLIB;
        } else if (strcmp(*argv, "-rle") == 0) {
            comp = COMP_RLE;
        }
#endif
        else if (strcmp(*argv, "-named_curve") == 0) {
            if (--argc < 1)
                goto bad;
#ifndef OPENSSL_NO_EC
            named_curve = *(++argv);
#else
            fprintf(stderr,
                    "ignoring -named_curve, since I'm compiled without ECDH\n");
            ++argv;
#endif
        } else if (strcmp(*argv, "-app_verify") == 0) {
            app_verify_arg.app_verify = 1;
        } else if (strcmp(*argv, "-proxy") == 0) {
            app_verify_arg.allow_proxy_certs = 1;
        } else if (strcmp(*argv, "-test_cipherlist") == 0) {
            test_cipherlist = 1;
        }
#ifndef OPENSSL_NO_NEXTPROTONEG
        else if (strcmp(*argv, "-npn_client") == 0) {
            npn_client = 1;
        } else if (strcmp(*argv, "-npn_server") == 0) {
            npn_server = 1;
        } else if (strcmp(*argv, "-npn_server_reject") == 0) {
            npn_server_reject = 1;
        }
#endif
        else if (strcmp(*argv, "-serverinfo_sct") == 0) {
            serverinfo_sct = 1;
        } else if (strcmp(*argv, "-serverinfo_tack") == 0) {
            serverinfo_tack = 1;
        } else if (strcmp(*argv, "-serverinfo_file") == 0) {
            if (--argc < 1)
                goto bad;
            serverinfo_file = *(++argv);
        } else if (strcmp(*argv, "-custom_ext") == 0) {
            custom_ext = 1;
        } else if (strcmp(*argv, "-alpn_client") == 0) {
            if (--argc < 1)
                goto bad;
            alpn_client = *(++argv);
        } else if (strcmp(*argv, "-alpn_server") == 0) {
            if (--argc < 1)
                goto bad;
            alpn_server = *(++argv);
        } else if (strcmp(*argv, "-alpn_expected") == 0) {
            if (--argc < 1)
                goto bad;
            alpn_expected = *(++argv);
        } else {
            int rv;
            arg = argv[0];
            argn = argv[1];
            /* Try to process command using SSL_CONF */
            rv = SSL_CONF_cmd_argv(c_cctx, &argc, &argv);
            /* If not processed try server */
            if (rv == 0)
                rv = SSL_CONF_cmd_argv(s_cctx, &argc, &argv);
            /* Recognised: store it for later use */
            if (rv > 0) {
                if (rv == 1)
                    argn = NULL;
                if (!conf_args) {
                    conf_args = sk_OPENSSL_STRING_new_null();
                    if (!conf_args)
                        goto end;
                }
                if (!sk_OPENSSL_STRING_push(conf_args, arg))
                    goto end;
                if (!sk_OPENSSL_STRING_push(conf_args, argn))
                    goto end;
                continue;
            }
            if (rv == -3)
                BIO_printf(bio_err, "Missing argument for %s\n", arg);
            else if (rv < 0)
                BIO_printf(bio_err, "Error with command %s\n", arg);
            else if (rv == 0)
                BIO_printf(bio_err, "unknown option %s\n", arg);
            badop = 1;
            break;
        }
        argc--;
        argv++;
    }
    if (badop) {
 bad:
        sv_usage();
        goto end;
    }

    /*
     * test_cipherlist prevails over protocol switch: we test the cipherlist
     * for all enabled protocols.
     */
    if (test_cipherlist == 1) {
        /*
         * ensure that the cipher list are correctly sorted and exit
         */
        fprintf(stdout, "Testing cipherlist order only. Ignoring all "
                "other options.\n");
        if (do_test_cipherlist() == 0)
            EXIT(1);
        ret = 0;
        goto end;
    }

    if (ssl3 + tls1 + dtls1 + dtls12 > 1) {
        fprintf(stderr, "At most one of -ssl3, -tls1, -dtls1 or -dtls12 should "
                "be requested.\n");
        EXIT(1);
    }

    /*
     * Testing was requested for a compiled-out protocol (e.g. SSLv3).
     * Ideally, we would error out, but the generic test wrapper can't know
     * when to expect failure. So we do nothing and return success.
     */
    if (no_protocol) {
        fprintf(stderr, "Testing was requested for a disabled protocol. "
                "Skipping tests.\n");
        ret = 0;
        goto end;
    }

    if (!ssl3 && !tls1 && !dtls1 && !dtls12 && number > 1 && !reuse && !force) {
        fprintf(stderr, "This case cannot work.  Use -f to perform "
                "the test anyway (and\n-d to see what happens), "
                "or add one of -ssl3, -tls1, -dtls1, -dtls12, -reuse\n"
                "to avoid protocol mismatch.\n");
        EXIT(1);
    }
#ifdef OPENSSL_FIPS
    if (fips_mode) {
        if (!FIPS_mode_set(1)) {
            ERR_load_crypto_strings();
            ERR_print_errors(BIO_new_fp(stderr, BIO_NOCLOSE));
            EXIT(1);
        } else
            fprintf(stderr, "*** IN FIPS MODE ***\n");
    }
#endif

    if (print_time) {
        if (!bio_pair) {
            fprintf(stderr, "Using BIO pair (-bio_pair)\n");
            bio_pair = 1;
        }
        if (number < 50 && !force)
            fprintf(stderr,
                    "Warning: For accurate timings, use more connections (e.g. -num 1000)\n");
    }

/*      if (cipher == NULL) cipher=getenv("SSL_CIPHER"); */

    SSL_library_init();
    SSL_load_error_strings();

#ifndef OPENSSL_NO_COMP
    if (comp == COMP_ZLIB)
        cm = COMP_zlib();
    if (comp == COMP_RLE)
        cm = COMP_rle();
    if (cm != NULL) {
        if (cm->type != NID_undef) {
            if (SSL_COMP_add_compression_method(comp, cm) != 0) {
                fprintf(stderr, "Failed to add compression method\n");
                ERR_print_errors_fp(stderr);
            }
        } else {
            fprintf(stderr,
                    "Warning: %s compression not supported\n",
                    (comp == COMP_RLE ? "rle" :
                     (comp == COMP_ZLIB ? "zlib" : "unknown")));
            ERR_print_errors_fp(stderr);
        }
    }
    ssl_comp_methods = SSL_COMP_get_compression_methods();
    n = sk_SSL_COMP_num(ssl_comp_methods);
    if (n) {
        int j;
        printf("Available compression methods:");
        for (j = 0; j < n; j++) {
            SSL_COMP *c = sk_SSL_COMP_value(ssl_comp_methods, j);
            printf("  %s:%d", c->name, c->id);
        }
        printf("\n");
    }
#endif

    /*
     * At this point, ssl3/tls1 is only set if the protocol is available.
     * (Otherwise we exit early.) However the compiler doesn't know this, so
     * we ifdef.
     */
#ifndef OPENSSL_NO_SSL3
    if (ssl3)
        meth = SSLv3_method();
    else
#endif
#ifndef OPENSSL_NO_DTLS
    if (dtls1)
        meth = DTLSv1_method();
    else if (dtls12)
        meth = DTLSv1_2_method();
    else
#endif
    if (tls1)
        meth = TLSv1_method();
    else
        meth = SSLv23_method();

    c_ctx = SSL_CTX_new(meth);
    s_ctx = SSL_CTX_new(meth);
    if ((c_ctx == NULL) || (s_ctx == NULL)) {
        ERR_print_errors(bio_err);
        goto end;
    }
    /*
     * Since we will use low security ciphersuites and keys for testing set
     * security level to zero.
     */
    SSL_CTX_set_security_level(c_ctx, 0);
    SSL_CTX_set_security_level(s_ctx, 0);

    if (cipher != NULL) {
        if (!SSL_CTX_set_cipher_list(c_ctx, cipher)
           || !SSL_CTX_set_cipher_list(s_ctx, cipher)) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    /* Process SSL_CONF arguments */
    SSL_CONF_CTX_set_ssl_ctx(c_cctx, c_ctx);
    SSL_CONF_CTX_set_ssl_ctx(s_cctx, s_ctx);

    for (i = 0; i < sk_OPENSSL_STRING_num(conf_args); i += 2) {
        int rv;
        arg = sk_OPENSSL_STRING_value(conf_args, i);
        argn = sk_OPENSSL_STRING_value(conf_args, i + 1);
        rv = SSL_CONF_cmd(c_cctx, arg, argn);
        /* If not recognised use server context */
        if (rv == -2)
            rv = SSL_CONF_cmd(s_cctx, arg, argn);
        if (rv <= 0) {
            BIO_printf(bio_err, "Error processing %s %s\n",
                       arg, argn ? argn : "");
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    if (!SSL_CONF_CTX_finish(s_cctx) || !SSL_CONF_CTX_finish(c_cctx)) {
        BIO_puts(bio_err, "Error finishing context\n");
        ERR_print_errors(bio_err);
        goto end;
    }
#ifndef OPENSSL_NO_DH
    if (!no_dhe) {
        if (dhe1024dsa) {
            /*
             * use SSL_OP_SINGLE_DH_USE to avoid small subgroup attacks
             */
            SSL_CTX_set_options(s_ctx, SSL_OP_SINGLE_DH_USE);
            dh = get_dh1024dsa();
        } else if (dhe1024)
            dh = get_dh1024();
        else
            dh = get_dh512();
        SSL_CTX_set_tmp_dh(s_ctx, dh);
        DH_free(dh);
    }
#else
    (void)no_dhe;
#endif

#ifndef OPENSSL_NO_EC
    if (!no_ecdhe) {
        int nid;

        if (named_curve != NULL) {
            nid = OBJ_sn2nid(named_curve);
            if (nid == 0) {
                BIO_printf(bio_err, "unknown curve name (%s)\n", named_curve);
                goto end;
            }
        } else
# ifdef OPENSSL_NO_EC2M
            nid = NID_X9_62_prime256v1;
# else
            nid = NID_sect163r2;
# endif

        ecdh = EC_KEY_new_by_curve_name(nid);
        if (ecdh == NULL) {
            BIO_printf(bio_err, "unable to create curve\n");
            goto end;
        }

        SSL_CTX_set_tmp_ecdh(s_ctx, ecdh);
        SSL_CTX_set_options(s_ctx, SSL_OP_SINGLE_ECDH_USE);
        EC_KEY_free(ecdh);
    }
#else
    (void)no_ecdhe;
#endif

#ifndef OPENSSL_NO_RSA
    SSL_CTX_set_tmp_rsa_callback(s_ctx, tmp_rsa_cb);
#endif

    if (!SSL_CTX_use_certificate_file(s_ctx, server_cert, SSL_FILETYPE_PEM)) {
        ERR_print_errors(bio_err);
    } else if (!SSL_CTX_use_PrivateKey_file(s_ctx,
                                            (server_key ? server_key :
                                             server_cert),
                                            SSL_FILETYPE_PEM)) {
        ERR_print_errors(bio_err);
        goto end;
    }

    if (client_auth) {
        if (!SSL_CTX_use_certificate_file(c_ctx, client_cert, SSL_FILETYPE_PEM)
           || !SSL_CTX_use_PrivateKey_file(c_ctx,
                                    (client_key ? client_key : client_cert),
                                    SSL_FILETYPE_PEM)) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    if ((!SSL_CTX_load_verify_locations(s_ctx, CAfile, CApath)) ||
        (!SSL_CTX_set_default_verify_paths(s_ctx)) ||
        (!SSL_CTX_load_verify_locations(c_ctx, CAfile, CApath)) ||
        (!SSL_CTX_set_default_verify_paths(c_ctx))) {
        /* fprintf(stderr,"SSL_load_verify_locations\n"); */
        ERR_print_errors(bio_err);
        /* goto end; */
    }

    if (client_auth) {
        printf("client authentication\n");
        SSL_CTX_set_verify(s_ctx,
                           SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
                           verify_callback);
        SSL_CTX_set_cert_verify_callback(s_ctx, app_verify_callback,
                                         &app_verify_arg);
    }
    if (server_auth) {
        printf("server authentication\n");
        SSL_CTX_set_verify(c_ctx, SSL_VERIFY_PEER, verify_callback);
        SSL_CTX_set_cert_verify_callback(c_ctx, app_verify_callback,
                                         &app_verify_arg);
    }

    {
        int session_id_context = 0;
        if (!SSL_CTX_set_session_id_context(s_ctx, (void *)&session_id_context,
                                       sizeof session_id_context)) {
            ERR_print_errors(bio_err);
            goto end;
        }
    }

    /* Use PSK only if PSK key is given */
    if (psk_key != NULL) {
        /*
         * no_psk is used to avoid putting psk command to openssl tool
         */
        if (no_psk) {
            /*
             * if PSK is not compiled in and psk key is given, do nothing and
             * exit successfully
             */
            ret = 0;
            goto end;
        }
#ifndef OPENSSL_NO_PSK
        SSL_CTX_set_psk_client_callback(c_ctx, psk_client_callback);
        SSL_CTX_set_psk_server_callback(s_ctx, psk_server_callback);
        if (debug)
            BIO_printf(bio_err, "setting PSK identity hint to s_ctx\n");
        if (!SSL_CTX_use_psk_identity_hint(s_ctx, "ctx server identity_hint")) {
            BIO_printf(bio_err, "error setting PSK identity hint to s_ctx\n");
            ERR_print_errors(bio_err);
            goto end;
        }
#endif
    }
#ifndef OPENSSL_NO_SRP
    if (srp_client_arg.srplogin) {
        if (!SSL_CTX_set_srp_username(c_ctx, srp_client_arg.srplogin)) {
            BIO_printf(bio_err, "Unable to set SRP username\n");
            goto end;
        }
        SSL_CTX_set_srp_cb_arg(c_ctx, &srp_client_arg);
        SSL_CTX_set_srp_client_pwd_callback(c_ctx,
                                            ssl_give_srp_client_pwd_cb);
        /*
         * SSL_CTX_set_srp_strength(c_ctx, srp_client_arg.strength);
         */
    }

    if (srp_server_arg.expected_user != NULL) {
        SSL_CTX_set_verify(s_ctx, SSL_VERIFY_NONE, verify_callback);
        SSL_CTX_set_srp_cb_arg(s_ctx, &srp_server_arg);
        SSL_CTX_set_srp_username_callback(s_ctx, ssl_srp_server_param_cb);
    }
#endif

#ifndef OPENSSL_NO_NEXTPROTONEG
    if (npn_client) {
        SSL_CTX_set_next_proto_select_cb(c_ctx, cb_client_npn, NULL);
    }
    if (npn_server) {
        if (npn_server_reject) {
            BIO_printf(bio_err,
                       "Can't have both -npn_server and -npn_server_reject\n");
            goto end;
        }
        SSL_CTX_set_next_protos_advertised_cb(s_ctx, cb_server_npn, NULL);
    }
    if (npn_server_reject) {
        SSL_CTX_set_next_protos_advertised_cb(s_ctx, cb_server_rejects_npn,
                                              NULL);
    }
#endif

    if (serverinfo_sct) {
        if (!SSL_CTX_add_client_custom_ext(c_ctx, SCT_EXT_TYPE,
                                      NULL, NULL, NULL,
                                      serverinfo_cli_parse_cb, NULL)) {
            BIO_printf(bio_err, "Error adding SCT extension\n");
            goto end;
        }
    }
    if (serverinfo_tack) {
        if (!SSL_CTX_add_client_custom_ext(c_ctx, TACK_EXT_TYPE,
                                      NULL, NULL, NULL,
                                      serverinfo_cli_parse_cb, NULL)) {
            BIO_printf(bio_err, "Error adding TACK extension\n");
            goto end;
        }
    }
    if (serverinfo_file)
        if (!SSL_CTX_use_serverinfo_file(s_ctx, serverinfo_file)) {
            BIO_printf(bio_err, "missing serverinfo file\n");
            goto end;
        }

    if (custom_ext) {
        if (!SSL_CTX_add_client_custom_ext(c_ctx, CUSTOM_EXT_TYPE_0,
                                      custom_ext_0_cli_add_cb,
                                      NULL, NULL,
                                      custom_ext_0_cli_parse_cb, NULL)
            || !SSL_CTX_add_client_custom_ext(c_ctx, CUSTOM_EXT_TYPE_1,
                                      custom_ext_1_cli_add_cb,
                                      NULL, NULL,
                                      custom_ext_1_cli_parse_cb, NULL)
            || !SSL_CTX_add_client_custom_ext(c_ctx, CUSTOM_EXT_TYPE_2,
                                      custom_ext_2_cli_add_cb,
                                      NULL, NULL,
                                      custom_ext_2_cli_parse_cb, NULL)
            || !SSL_CTX_add_client_custom_ext(c_ctx, CUSTOM_EXT_TYPE_3,
                                      custom_ext_3_cli_add_cb,
                                      NULL, NULL,
                                      custom_ext_3_cli_parse_cb, NULL)
            || !SSL_CTX_add_server_custom_ext(s_ctx, CUSTOM_EXT_TYPE_0,
                                      custom_ext_0_srv_add_cb,
                                      NULL, NULL,
                                      custom_ext_0_srv_parse_cb, NULL)
            || !SSL_CTX_add_server_custom_ext(s_ctx, CUSTOM_EXT_TYPE_1,
                                      custom_ext_1_srv_add_cb,
                                      NULL, NULL,
                                      custom_ext_1_srv_parse_cb, NULL)
            || !SSL_CTX_add_server_custom_ext(s_ctx, CUSTOM_EXT_TYPE_2,
                                      custom_ext_2_srv_add_cb,
                                      NULL, NULL,
                                      custom_ext_2_srv_parse_cb, NULL)
            || !SSL_CTX_add_server_custom_ext(s_ctx, CUSTOM_EXT_TYPE_3,
                                      custom_ext_3_srv_add_cb,
                                      NULL, NULL,
                                      custom_ext_3_srv_parse_cb, NULL)) {
            BIO_printf(bio_err, "Error setting custom extensions\n");
            goto end;
        }
    }

    if (alpn_server)
        SSL_CTX_set_alpn_select_cb(s_ctx, cb_server_alpn, NULL);

    if (alpn_client) {
        unsigned short alpn_len;
        unsigned char *alpn = next_protos_parse(&alpn_len, alpn_client);

        if (alpn == NULL) {
            BIO_printf(bio_err, "Error parsing -alpn_client argument\n");
            goto end;
        }
        /* Returns 0 on success!! */
        if (SSL_CTX_set_alpn_protos(c_ctx, alpn, alpn_len)) {
            BIO_printf(bio_err, "Error setting ALPN\n");
            OPENSSL_free(alpn);
            goto end;
        }
        OPENSSL_free(alpn);
    }

    c_ssl = SSL_new(c_ctx);
    s_ssl = SSL_new(s_ctx);

#ifndef OPENSSL_NO_KRB5
    if (c_ssl && c_ssl->kssl_ctx) {
        char localhost[MAXHOSTNAMELEN + 2];

        if (gethostname(localhost, sizeof localhost - 1) == 0) {
            localhost[sizeof localhost - 1] = '\0';
            if (strlen(localhost) == sizeof localhost - 1) {
                BIO_printf(bio_err, "localhost name too long\n");
                goto end;
            }
            kssl_ctx_setstring(c_ssl->kssl_ctx, KSSL_SERVER, localhost);
        }
    }
#endif                          /* OPENSSL_NO_KRB5 */

    BIO_printf(bio_stdout, "Doing handshakes=%d bytes=%ld\n", number, bytes);
    for (i = 0; i < number; i++) {
        if (!reuse) {
            if (!SSL_set_session(c_ssl, NULL)) {
                BIO_printf(bio_err, "Failed to set session\n");
                goto end;
            }
        }
        if (bio_pair)
            ret = doit_biopair(s_ssl, c_ssl, bytes, &s_time, &c_time);
        else
            ret = doit(s_ssl, c_ssl, bytes);
        if (ret)  break;
    }

    if (!verbose) {
        print_details(c_ssl, "");
    }
    if (print_time) {
#ifdef CLOCKS_PER_SEC
        /*
         * "To determine the time in seconds, the value returned by the clock
         * function should be divided by the value of the macro
         * CLOCKS_PER_SEC." -- ISO/IEC 9899
         */
        BIO_printf(bio_stdout, "Approximate total server time: %6.2f s\n"
                   "Approximate total client time: %6.2f s\n",
                   (double)s_time / CLOCKS_PER_SEC,
                   (double)c_time / CLOCKS_PER_SEC);
#else
        BIO_printf(bio_stdout,
                   "Approximate total server time: %6.2f units\n"
                   "Approximate total client time: %6.2f units\n",
                   (double)s_time, (double)c_time);
#endif
    }

    SSL_free(s_ssl);
    SSL_free(c_ssl);

 end:
    SSL_CTX_free(s_ctx);
    SSL_CTX_free(c_ctx);
    SSL_CONF_CTX_free(s_cctx);
    SSL_CONF_CTX_free(c_cctx);
    sk_OPENSSL_STRING_free(conf_args);

    BIO_free(bio_stdout);

#ifndef OPENSSL_NO_RSA
    free_tmp_rsa();
#endif
#ifndef OPENSSL_NO_ENGINE
    ENGINE_cleanup();
#endif
    CRYPTO_cleanup_all_ex_data();
    ERR_free_strings();
    ERR_remove_thread_state(NULL);
    EVP_cleanup();
    CRYPTO_mem_leaks(bio_err);
    BIO_free(bio_err);
    EXIT(ret);
}

int doit_biopair(SSL *s_ssl, SSL *c_ssl, long count,
                 clock_t *s_time, clock_t *c_time)
{
    long cw_num = count, cr_num = count, sw_num = count, sr_num = count;
    BIO *s_ssl_bio = NULL, *c_ssl_bio = NULL;
    BIO *server = NULL, *server_io = NULL, *client = NULL, *client_io = NULL;
    int ret = 1;

    size_t bufsiz = 256;        /* small buffer for testing */

    if (!BIO_new_bio_pair(&server, bufsiz, &server_io, bufsiz))
        goto err;
    if (!BIO_new_bio_pair(&client, bufsiz, &client_io, bufsiz))
        goto err;

    s_ssl_bio = BIO_new(BIO_f_ssl());
    if (!s_ssl_bio)
        goto err;

    c_ssl_bio = BIO_new(BIO_f_ssl());
    if (!c_ssl_bio)
        goto err;

    SSL_set_connect_state(c_ssl);
    SSL_set_bio(c_ssl, client, client);
    (void)BIO_set_ssl(c_ssl_bio, c_ssl, BIO_NOCLOSE);

    SSL_set_accept_state(s_ssl);
    SSL_set_bio(s_ssl, server, server);
    (void)BIO_set_ssl(s_ssl_bio, s_ssl, BIO_NOCLOSE);

    do {
        /*-
         * c_ssl_bio:          SSL filter BIO
         *
         * client:             pseudo-I/O for SSL library
         *
         * client_io:          client's SSL communication; usually to be
         *                     relayed over some I/O facility, but in this
         *                     test program, we're the server, too:
         *
         * server_io:          server's SSL communication
         *
         * server:             pseudo-I/O for SSL library
         *
         * s_ssl_bio:          SSL filter BIO
         *
         * The client and the server each employ a "BIO pair":
         * client + client_io, server + server_io.
         * BIO pairs are symmetric.  A BIO pair behaves similar
         * to a non-blocking socketpair (but both endpoints must
         * be handled by the same thread).
         * [Here we could connect client and server to the ends
         * of a single BIO pair, but then this code would be less
         * suitable as an example for BIO pairs in general.]
         *
         * Useful functions for querying the state of BIO pair endpoints:
         *
         * BIO_ctrl_pending(bio)              number of bytes we can read now
         * BIO_ctrl_get_read_request(bio)     number of bytes needed to fulfil
         *                                      other side's read attempt
         * BIO_ctrl_get_write_guarantee(bio)   number of bytes we can write now
         *
         * ..._read_request is never more than ..._write_guarantee;
         * it depends on the application which one you should use.
         */

        /*
         * We have non-blocking behaviour throughout this test program, but
         * can be sure that there is *some* progress in each iteration; so we
         * don't have to worry about ..._SHOULD_READ or ..._SHOULD_WRITE --
         * we just try everything in each iteration
         */

        {
            /* CLIENT */

            char cbuf[1024 * 8];
            int i, r;
            clock_t c_clock = clock();

            memset(cbuf, 0, sizeof(cbuf));

            if (debug)
                if (SSL_in_init(c_ssl))
                    printf("client waiting in SSL_connect - %s\n",
                           SSL_state_string_long(c_ssl));

            if (cw_num > 0) {
                /* Write to server. */

                if (cw_num > (long)sizeof cbuf)
                    i = sizeof cbuf;
                else
                    i = (int)cw_num;
                r = BIO_write(c_ssl_bio, cbuf, i);
                if (r < 0) {
                    if (!BIO_should_retry(c_ssl_bio)) {
                        fprintf(stderr, "ERROR in CLIENT\n");
                        goto err;
                    }
                    /*
                     * BIO_should_retry(...) can just be ignored here. The
                     * library expects us to call BIO_write with the same
                     * arguments again, and that's what we will do in the
                     * next iteration.
                     */
                } else if (r == 0) {
                    fprintf(stderr, "SSL CLIENT STARTUP FAILED\n");
                    goto err;
                } else {
                    if (debug)
                        printf("client wrote %d\n", r);
                    cw_num -= r;
                }
            }

            if (cr_num > 0) {
                /* Read from server. */

                r = BIO_read(c_ssl_bio, cbuf, sizeof(cbuf));
                if (r < 0) {
                    if (!BIO_should_retry(c_ssl_bio)) {
                        fprintf(stderr, "ERROR in CLIENT\n");
                        goto err;
                    }
                    /*
                     * Again, "BIO_should_retry" can be ignored.
                     */
                } else if (r == 0) {
                    fprintf(stderr, "SSL CLIENT STARTUP FAILED\n");
                    goto err;
                } else {
                    if (debug)
                        printf("client read %d\n", r);
                    cr_num -= r;
                }
            }

            /*
             * c_time and s_time increments will typically be very small
             * (depending on machine speed and clock tick intervals), but
             * sampling over a large number of connections should result in
             * fairly accurate figures.  We cannot guarantee a lot, however
             * -- if each connection lasts for exactly one clock tick, it
             * will be counted only for the client or only for the server or
             * even not at all.
             */
            *c_time += (clock() - c_clock);
        }

        {
            /* SERVER */

            char sbuf[1024 * 8];
            int i, r;
            clock_t s_clock = clock();

            memset(sbuf, 0, sizeof(sbuf));

            if (debug)
                if (SSL_in_init(s_ssl))
                    printf("server waiting in SSL_accept - %s\n",
                           SSL_state_string_long(s_ssl));

            if (sw_num > 0) {
                /* Write to client. */

                if (sw_num > (long)sizeof sbuf)
                    i = sizeof sbuf;
                else
                    i = (int)sw_num;
                r = BIO_write(s_ssl_bio, sbuf, i);
                if (r < 0) {
                    if (!BIO_should_retry(s_ssl_bio)) {
                        fprintf(stderr, "ERROR in SERVER\n");
                        goto err;
                    }
                    /* Ignore "BIO_should_retry". */
                } else if (r == 0) {
                    fprintf(stderr, "SSL SERVER STARTUP FAILED\n");
                    goto err;
                } else {
                    if (debug)
                        printf("server wrote %d\n", r);
                    sw_num -= r;
                }
            }

            if (sr_num > 0) {
                /* Read from client. */

                r = BIO_read(s_ssl_bio, sbuf, sizeof(sbuf));
                if (r < 0) {
                    if (!BIO_should_retry(s_ssl_bio)) {
                        fprintf(stderr, "ERROR in SERVER\n");
                        goto err;
                    }
                    /* blah, blah */
                } else if (r == 0) {
                    fprintf(stderr, "SSL SERVER STARTUP FAILED\n");
                    goto err;
                } else {
                    if (debug)
                        printf("server read %d\n", r);
                    sr_num -= r;
                }
            }

            *s_time += (clock() - s_clock);
        }

        {
            /* "I/O" BETWEEN CLIENT AND SERVER. */

            size_t r1, r2;
            BIO *io1 = server_io, *io2 = client_io;
            /*
             * we use the non-copying interface for io1 and the standard
             * BIO_write/BIO_read interface for io2
             */

            static int prev_progress = 1;
            int progress = 0;

            /* io1 to io2 */
            do {
                size_t num;
                int r;

                r1 = BIO_ctrl_pending(io1);
                r2 = BIO_ctrl_get_write_guarantee(io2);

                num = r1;
                if (r2 < num)
                    num = r2;
                if (num) {
                    char *dataptr;

                    if (INT_MAX < num) /* yeah, right */
                        num = INT_MAX;

                    r = BIO_nread(io1, &dataptr, (int)num);
                    assert(r > 0);
                    assert(r <= (int)num);
                    /*
                     * possibly r < num (non-contiguous data)
                     */
                    num = r;
                    r = BIO_write(io2, dataptr, (int)num);
                    if (r != (int)num) { /* can't happen */
                        fprintf(stderr, "ERROR: BIO_write could not write "
                                "BIO_ctrl_get_write_guarantee() bytes");
                        goto err;
                    }
                    progress = 1;

                    if (debug)
                        printf((io1 == client_io) ?
                               "C->S relaying: %d bytes\n" :
                               "S->C relaying: %d bytes\n", (int)num);
                }
            }
            while (r1 && r2);

            /* io2 to io1 */
            {
                size_t num;
                int r;

                r1 = BIO_ctrl_pending(io2);
                r2 = BIO_ctrl_get_read_request(io1);
                /*
                 * here we could use ..._get_write_guarantee instead of
                 * ..._get_read_request, but by using the latter we test
                 * restartability of the SSL implementation more thoroughly
                 */
                num = r1;
                if (r2 < num)
                    num = r2;
                if (num) {
                    char *dataptr;

                    if (INT_MAX < num)
                        num = INT_MAX;

                    if (num > 1)
                        --num;  /* test restartability even more thoroughly */

                    r = BIO_nwrite0(io1, &dataptr);
                    assert(r > 0);
                    if (r < (int)num)
                        num = r;
                    r = BIO_read(io2, dataptr, (int)num);
                    if (r != (int)num) { /* can't happen */
                        fprintf(stderr, "ERROR: BIO_read could not read "
                                "BIO_ctrl_pending() bytes");
                        goto err;
                    }
                    progress = 1;
                    r = BIO_nwrite(io1, &dataptr, (int)num);
                    if (r != (int)num) { /* can't happen */
                        fprintf(stderr, "ERROR: BIO_nwrite() did not accept "
                                "BIO_nwrite0() bytes");
                        goto err;
                    }

                    if (debug)
                        printf((io2 == client_io) ?
                               "C->S relaying: %d bytes\n" :
                               "S->C relaying: %d bytes\n", (int)num);
                }
            }                   /* no loop, BIO_ctrl_get_read_request now
                                 * returns 0 anyway */

            if (!progress && !prev_progress)
                if (cw_num > 0 || cr_num > 0 || sw_num > 0 || sr_num > 0) {
                    fprintf(stderr, "ERROR: got stuck\n");
                    fprintf(stderr, " ERROR.\n");
                    goto err;
                }
            prev_progress = progress;
        }
    }
    while (cw_num > 0 || cr_num > 0 || sw_num > 0 || sr_num > 0);

    if (verbose)
        print_details(c_ssl, "DONE via BIO pair: ");
#ifndef OPENSSL_NO_NEXTPROTONEG
    if (verify_npn(c_ssl, s_ssl) < 0) {
        ret = 1;
        goto end;
    }
#endif
    if (verify_serverinfo() < 0) {
        fprintf(stderr, "Server info verify error\n");
        ret = 1;
        goto err;
    }
    if (verify_alpn(c_ssl, s_ssl) < 0) {
        ret = 1;
        goto err;
    }

    if (custom_ext_error) {
        fprintf(stderr, "Custom extension error\n");
        ret = 1;
        goto err;
    }

 end:
    ret = 0;

 err:
    ERR_print_errors(bio_err);

    BIO_free(server);
    BIO_free(server_io);
    BIO_free(client);
    BIO_free(client_io);
    BIO_free(s_ssl_bio);
    BIO_free(c_ssl_bio);

    return ret;
}

#define W_READ  1
#define W_WRITE 2
#define C_DONE  1
#define S_DONE  2

int doit(SSL *s_ssl, SSL *c_ssl, long count)
{
    char *cbuf = NULL, *sbuf = NULL;
    long bufsiz;
    long cw_num = count, cr_num = count;
    long sw_num = count, sr_num = count;
    int ret = 1;
    BIO *c_to_s = NULL;
    BIO *s_to_c = NULL;
    BIO *c_bio = NULL;
    BIO *s_bio = NULL;
    int c_r, c_w, s_r, s_w;
    int i, j;
    int done = 0;
    int c_write, s_write;
    int do_server = 0, do_client = 0;
    int max_frag = 5 * 1024;

    bufsiz = count > 40 * 1024 ? 40 * 1024 : count;

    if ((cbuf = OPENSSL_malloc(bufsiz)) == NULL)
        goto err;
    if ((sbuf = OPENSSL_malloc(bufsiz)) == NULL)
        goto err;

    memset(cbuf, 0, bufsiz);
    memset(sbuf, 0, bufsiz);

    c_to_s = BIO_new(BIO_s_mem());
    s_to_c = BIO_new(BIO_s_mem());
    if ((s_to_c == NULL) || (c_to_s == NULL)) {
        ERR_print_errors(bio_err);
        goto err;
    }

    c_bio = BIO_new(BIO_f_ssl());
    s_bio = BIO_new(BIO_f_ssl());
    if ((c_bio == NULL) || (s_bio == NULL)) {
        ERR_print_errors(bio_err);
        goto err;
    }

    SSL_set_connect_state(c_ssl);
    SSL_set_bio(c_ssl, s_to_c, c_to_s);
    SSL_set_max_send_fragment(c_ssl, max_frag);
    BIO_set_ssl(c_bio, c_ssl, BIO_NOCLOSE);

    SSL_set_accept_state(s_ssl);
    SSL_set_bio(s_ssl, c_to_s, s_to_c);
    SSL_set_max_send_fragment(s_ssl, max_frag);
    BIO_set_ssl(s_bio, s_ssl, BIO_NOCLOSE);

    c_r = 0;
    s_r = 1;
    c_w = 1;
    s_w = 0;
    c_write = 1, s_write = 0;

    /* We can always do writes */
    for (;;) {
        do_server = 0;
        do_client = 0;

        i = (int)BIO_pending(s_bio);
        if ((i && s_r) || s_w)
            do_server = 1;

        i = (int)BIO_pending(c_bio);
        if ((i && c_r) || c_w)
            do_client = 1;

        if (do_server && debug) {
            if (SSL_in_init(s_ssl))
                printf("server waiting in SSL_accept - %s\n",
                       SSL_state_string_long(s_ssl));
/*-
            else if (s_write)
                printf("server:SSL_write()\n");
            else
                printf("server:SSL_read()\n"); */
        }

        if (do_client && debug) {
            if (SSL_in_init(c_ssl))
                printf("client waiting in SSL_connect - %s\n",
                       SSL_state_string_long(c_ssl));
/*-
            else if (c_write)
                printf("client:SSL_write()\n");
            else
                printf("client:SSL_read()\n"); */
        }

        if (!do_client && !do_server) {
            fprintf(stdout, "ERROR IN STARTUP\n");
            ERR_print_errors(bio_err);
            goto err;
        }
        if (do_client && !(done & C_DONE)) {
            if (c_write) {
                j = (cw_num > bufsiz) ? (int)bufsiz : (int)cw_num;
                i = BIO_write(c_bio, cbuf, j);
                if (i < 0) {
                    c_r = 0;
                    c_w = 0;
                    if (BIO_should_retry(c_bio)) {
                        if (BIO_should_read(c_bio))
                            c_r = 1;
                        if (BIO_should_write(c_bio))
                            c_w = 1;
                    } else {
                        fprintf(stderr, "ERROR in CLIENT\n");
                        ERR_print_errors(bio_err);
                        goto err;
                    }
                } else if (i == 0) {
                    fprintf(stderr, "SSL CLIENT STARTUP FAILED\n");
                    goto err;
                } else {
                    if (debug)
                        printf("client wrote %d\n", i);
                    /* ok */
                    s_r = 1;
                    c_write = 0;
                    cw_num -= i;
                    if (max_frag > 1029)
                        SSL_set_max_send_fragment(c_ssl, max_frag -= 5);
                }
            } else {
                i = BIO_read(c_bio, cbuf, bufsiz);
                if (i < 0) {
                    c_r = 0;
                    c_w = 0;
                    if (BIO_should_retry(c_bio)) {
                        if (BIO_should_read(c_bio))
                            c_r = 1;
                        if (BIO_should_write(c_bio))
                            c_w = 1;
                    } else {
                        fprintf(stderr, "ERROR in CLIENT\n");
                        ERR_print_errors(bio_err);
                        goto err;
                    }
                } else if (i == 0) {
                    fprintf(stderr, "SSL CLIENT STARTUP FAILED\n");
                    goto err;
                } else {
                    if (debug)
                        printf("client read %d\n", i);
                    cr_num -= i;
                    if (sw_num > 0) {
                        s_write = 1;
                        s_w = 1;
                    }
                    if (cr_num <= 0) {
                        s_write = 1;
                        s_w = 1;
                        done = S_DONE | C_DONE;
                    }
                }
            }
        }

        if (do_server && !(done & S_DONE)) {
            if (!s_write) {
                i = BIO_read(s_bio, sbuf, bufsiz);
                if (i < 0) {
                    s_r = 0;
                    s_w = 0;
                    if (BIO_should_retry(s_bio)) {
                        if (BIO_should_read(s_bio))
                            s_r = 1;
                        if (BIO_should_write(s_bio))
                            s_w = 1;
                    } else {
                        fprintf(stderr, "ERROR in SERVER\n");
                        ERR_print_errors(bio_err);
                        goto err;
                    }
                } else if (i == 0) {
                    ERR_print_errors(bio_err);
                    fprintf(stderr,
                            "SSL SERVER STARTUP FAILED in SSL_read\n");
                    goto err;
                } else {
                    if (debug)
                        printf("server read %d\n", i);
                    sr_num -= i;
                    if (cw_num > 0) {
                        c_write = 1;
                        c_w = 1;
                    }
                    if (sr_num <= 0) {
                        s_write = 1;
                        s_w = 1;
                        c_write = 0;
                    }
                }
            } else {
                j = (sw_num > bufsiz) ? (int)bufsiz : (int)sw_num;
                i = BIO_write(s_bio, sbuf, j);
                if (i < 0) {
                    s_r = 0;
                    s_w = 0;
                    if (BIO_should_retry(s_bio)) {
                        if (BIO_should_read(s_bio))
                            s_r = 1;
                        if (BIO_should_write(s_bio))
                            s_w = 1;
                    } else {
                        fprintf(stderr, "ERROR in SERVER\n");
                        ERR_print_errors(bio_err);
                        goto err;
                    }
                } else if (i == 0) {
                    ERR_print_errors(bio_err);
                    fprintf(stderr,
                            "SSL SERVER STARTUP FAILED in SSL_write\n");
                    goto err;
                } else {
                    if (debug)
                        printf("server wrote %d\n", i);
                    sw_num -= i;
                    s_write = 0;
                    c_r = 1;
                    if (sw_num <= 0)
                        done |= S_DONE;
                    if (max_frag > 1029)
                        SSL_set_max_send_fragment(s_ssl, max_frag -= 5);
                }
            }
        }

        if ((done & S_DONE) && (done & C_DONE))
            break;
    }

    if (verbose)
        print_details(c_ssl, "DONE: ");
#ifndef OPENSSL_NO_NEXTPROTONEG
    if (verify_npn(c_ssl, s_ssl) < 0) {
        ret = 1;
        goto err;
    }
#endif
    if (verify_serverinfo() < 0) {
        fprintf(stderr, "Server info verify error\n");
        ret = 1;
        goto err;
    }
    if (custom_ext_error) {
        fprintf(stderr, "Custom extension error\n");
        ret = 1;
        goto err;
    }
    ret = 0;
 err:
    /*
     * We have to set the BIO's to NULL otherwise they will be
     * OPENSSL_free()ed twice.  Once when th s_ssl is SSL_free()ed and again
     * when c_ssl is SSL_free()ed. This is a hack required because s_ssl and
     * c_ssl are sharing the same BIO structure and SSL_set_bio() and
     * SSL_free() automatically BIO_free non NULL entries. You should not
     * normally do this or be required to do this
     */
    if (s_ssl != NULL) {
        s_ssl->rbio = NULL;
        s_ssl->wbio = NULL;
    }
    if (c_ssl != NULL) {
        c_ssl->rbio = NULL;
        c_ssl->wbio = NULL;
    }

    BIO_free(c_to_s);
    BIO_free(s_to_c);
    BIO_free_all(c_bio);
    BIO_free_all(s_bio);

    if (cbuf)
        OPENSSL_free(cbuf);
    if (sbuf)
        OPENSSL_free(sbuf);

    return (ret);
}

static int get_proxy_auth_ex_data_idx(void)
{
    static volatile int idx = -1;
    if (idx < 0) {
        CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
        if (idx < 0) {
            idx = X509_STORE_CTX_get_ex_new_index(0,
                                                  "SSLtest for verify callback",
                                                  NULL, NULL, NULL);
        }
        CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
    }
    return idx;
}

static int verify_callback(int ok, X509_STORE_CTX *ctx)
{
    char *s, buf[256];

    s = X509_NAME_oneline(X509_get_subject_name(ctx->current_cert), buf,
                          sizeof buf);
    if (s != NULL) {
        if (ok)
            printf("depth=%d %s\n", ctx->error_depth, buf);
        else {
            fprintf(stderr, "depth=%d error=%d %s\n",
                    ctx->error_depth, ctx->error, buf);
        }
    }

    if (ok == 0) {
        switch (ctx->error) {
        default:
            fprintf(stderr, "Error string: %s\n",
                    X509_verify_cert_error_string(ctx->error));
            break;
        case X509_V_ERR_CERT_NOT_YET_VALID:
        case X509_V_ERR_CERT_HAS_EXPIRED:
        case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
            ok = 1;
        }
    }

    if (ok == 1) {
        X509 *xs = ctx->current_cert;
        if (xs->ex_flags & EXFLAG_PROXY) {
            unsigned int *letters = X509_STORE_CTX_get_ex_data(ctx,
                                                               get_proxy_auth_ex_data_idx
                                                               ());

            if (letters) {
                int found_any = 0;
                int i;
                PROXY_CERT_INFO_EXTENSION *pci =
                    X509_get_ext_d2i(xs, NID_proxyCertInfo,
                                     NULL, NULL);

                switch (OBJ_obj2nid(pci->proxyPolicy->policyLanguage)) {
                case NID_Independent:
                    /*
                     * Completely meaningless in this program, as there's no
                     * way to grant explicit rights to a specific PrC.
                     * Basically, using id-ppl-Independent is the perfect way
                     * to grant no rights at all.
                     */
                    fprintf(stderr, "  Independent proxy certificate");
                    for (i = 0; i < 26; i++)
                        letters[i] = 0;
                    break;
                case NID_id_ppl_inheritAll:
                    /*
                     * This is basically a NOP, we simply let the current
                     * rights stand as they are.
                     */
                    fprintf(stderr, "  Proxy certificate inherits all");
                    break;
                default:
                    s = (char *)
                        pci->proxyPolicy->policy->data;
                    i = pci->proxyPolicy->policy->length;

                    /*
                     * The algorithm works as follows: it is assumed that
                     * previous iterations or the initial granted rights has
                     * already set some elements of `letters'.  What we need
                     * to do is to clear those that weren't granted by the
                     * current PrC as well.  The easiest way to do this is to
                     * add 1 to all the elements whose letters are given with
                     * the current policy. That way, all elements that are
                     * set by the current policy and were already set by
                     * earlier policies and through the original grant of
                     * rights will get the value 2 or higher. The last thing
                     * to do is to sweep through `letters' and keep the
                     * elements having the value 2 as set, and clear all the
                     * others.
                     */

                    printf("  Certificate proxy rights = %*.*s", i,
                            i, s);
                    while (i-- > 0) {
                        int c = *s++;
                        if (isascii(c) && isalpha(c)) {
                            if (islower(c))
                                c = toupper(c);
                            letters[c - 'A']++;
                        }
                    }
                    for (i = 0; i < 26; i++)
                        if (letters[i] < 2)
                            letters[i] = 0;
                        else
                            letters[i] = 1;
                }

                found_any = 0;
                printf(", resulting proxy rights = ");
                for (i = 0; i < 26; i++)
                    if (letters[i]) {
                        printf("%c", i + 'A');
                        found_any = 1;
                    }
                if (!found_any)
                    printf("none");
                printf("\n");

                PROXY_CERT_INFO_EXTENSION_free(pci);
            }
        }
    }

    return (ok);
}

static void process_proxy_debug(int indent, const char *format, ...)
{
    /* That's 80 > */
    static const char indentation[] =
        ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
        ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>";
    char my_format[256];
    va_list args;

    BIO_snprintf(my_format, sizeof(my_format), "%*.*s %s",
                 indent, indent, indentation, format);

    va_start(args, format);
    vfprintf(stderr, my_format, args);
    va_end(args);
}

/*-
 * Priority levels:
 *  0   [!]var, ()
 *  1   & ^
 *  2   |
 */
static int process_proxy_cond_adders(unsigned int letters[26],
                                     const char *cond, const char **cond_end,
                                     int *pos, int indent);
static int process_proxy_cond_val(unsigned int letters[26], const char *cond,
                                  const char **cond_end, int *pos, int indent)
{
    int c;
    int ok = 1;
    int negate = 0;

    while (isspace((int)*cond)) {
        cond++;
        (*pos)++;
    }
    c = *cond;

    if (debug)
        process_proxy_debug(indent,
                            "Start process_proxy_cond_val at position %d: %s\n",
                            *pos, cond);

    while (c == '!') {
        negate = !negate;
        cond++;
        (*pos)++;
        while (isspace((int)*cond)) {
            cond++;
            (*pos)++;
        }
        c = *cond;
    }

    if (c == '(') {
        cond++;
        (*pos)++;
        ok = process_proxy_cond_adders(letters, cond, cond_end, pos,
                                       indent + 1);
        cond = *cond_end;
        if (ok < 0)
            goto end;
        while (isspace((int)*cond)) {
            cond++;
            (*pos)++;
        }
        c = *cond;
        if (c != ')') {
            fprintf(stderr,
                    "Weird condition character in position %d: "
                    "%c\n", *pos, c);
            ok = -1;
            goto end;
        }
        cond++;
        (*pos)++;
    } else if (isascii(c) && isalpha(c)) {
        if (islower(c))
            c = toupper(c);
        ok = letters[c - 'A'];
        cond++;
        (*pos)++;
    } else {
        fprintf(stderr,
                "Weird condition character in position %d: " "%c\n", *pos, c);
        ok = -1;
        goto end;
    }
 end:
    *cond_end = cond;
    if (ok >= 0 && negate)
        ok = !ok;

    if (debug)
        process_proxy_debug(indent,
                            "End process_proxy_cond_val at position %d: %s, returning %d\n",
                            *pos, cond, ok);

    return ok;
}

static int process_proxy_cond_multipliers(unsigned int letters[26],
                                          const char *cond,
                                          const char **cond_end, int *pos,
                                          int indent)
{
    int ok;
    char c;

    if (debug)
        process_proxy_debug(indent,
                            "Start process_proxy_cond_multipliers at position %d: %s\n",
                            *pos, cond);

    ok = process_proxy_cond_val(letters, cond, cond_end, pos, indent + 1);
    cond = *cond_end;
    if (ok < 0)
        goto end;

    while (ok >= 0) {
        while (isspace((int)*cond)) {
            cond++;
            (*pos)++;
        }
        c = *cond;

        switch (c) {
        case '&':
        case '^':
            {
                int save_ok = ok;

                cond++;
                (*pos)++;
                ok = process_proxy_cond_val(letters,
                                            cond, cond_end, pos, indent + 1);
                cond = *cond_end;
                if (ok < 0)
                    break;

                switch (c) {
                case '&':
                    ok &= save_ok;
                    break;
                case '^':
                    ok ^= save_ok;
                    break;
                default:
                    fprintf(stderr, "SOMETHING IS SERIOUSLY WRONG!"
                            " STOPPING\n");
                    EXIT(1);
                }
            }
            break;
        default:
            goto end;
        }
    }
 end:
    if (debug)
        process_proxy_debug(indent,
                            "End process_proxy_cond_multipliers at position %d: %s, returning %d\n",
                            *pos, cond, ok);

    *cond_end = cond;
    return ok;
}

static int process_proxy_cond_adders(unsigned int letters[26],
                                     const char *cond, const char **cond_end,
                                     int *pos, int indent)
{
    int ok;
    char c;

    if (debug)
        process_proxy_debug(indent,
                            "Start process_proxy_cond_adders at position %d: %s\n",
                            *pos, cond);

    ok = process_proxy_cond_multipliers(letters, cond, cond_end, pos,
                                        indent + 1);
    cond = *cond_end;
    if (ok < 0)
        goto end;

    while (ok >= 0) {
        while (isspace((int)*cond)) {
            cond++;
            (*pos)++;
        }
        c = *cond;

        switch (c) {
        case '|':
            {
                int save_ok = ok;

                cond++;
                (*pos)++;
                ok = process_proxy_cond_multipliers(letters,
                                                    cond, cond_end, pos,
                                                    indent + 1);
                cond = *cond_end;
                if (ok < 0)
                    break;

                switch (c) {
                case '|':
                    ok |= save_ok;
                    break;
                default:
                    fprintf(stderr, "SOMETHING IS SERIOUSLY WRONG!"
                            " STOPPING\n");
                    EXIT(1);
                }
            }
            break;
        default:
            goto end;
        }
    }
 end:
    if (debug)
        process_proxy_debug(indent,
                            "End process_proxy_cond_adders at position %d: %s, returning %d\n",
                            *pos, cond, ok);

    *cond_end = cond;
    return ok;
}

static int process_proxy_cond(unsigned int letters[26],
                              const char *cond, const char **cond_end)
{
    int pos = 1;
    return process_proxy_cond_adders(letters, cond, cond_end, &pos, 1);
}

static int app_verify_callback(X509_STORE_CTX *ctx, void *arg)
{
    int ok = 1;
    struct app_verify_arg *cb_arg = arg;
    unsigned int letters[26];   /* only used with proxy_auth */

    if (cb_arg->app_verify) {
        char *s = NULL, buf[256];

        printf("In app_verify_callback, allowing cert. ");
        printf("Arg is: %s\n", cb_arg->string);
        printf("Finished printing do we have a context? 0x%p a cert? 0x%p\n",
                (void *)ctx, (void *)ctx->cert);
        if (ctx->cert)
            s = X509_NAME_oneline(X509_get_subject_name(ctx->cert), buf, 256);
        if (s != NULL) {
            printf("cert depth=%d %s\n", ctx->error_depth, buf);
        }
        return (1);
    }
    if (cb_arg->proxy_auth) {
        int found_any = 0, i;
        char *sp;

        for (i = 0; i < 26; i++)
            letters[i] = 0;
        for (sp = cb_arg->proxy_auth; *sp; sp++) {
            int c = *sp;
            if (isascii(c) && isalpha(c)) {
                if (islower(c))
                    c = toupper(c);
                letters[c - 'A'] = 1;
            }
        }

        printf("  Initial proxy rights = ");
        for (i = 0; i < 26; i++)
            if (letters[i]) {
                printf("%c", i + 'A');
                found_any = 1;
            }
        if (!found_any)
            printf("none");
        printf("\n");

        X509_STORE_CTX_set_ex_data(ctx,
                                   get_proxy_auth_ex_data_idx(), letters);
    }
    if (cb_arg->allow_proxy_certs) {
        X509_STORE_CTX_set_flags(ctx, X509_V_FLAG_ALLOW_PROXY_CERTS);
    }
    ok = X509_verify_cert(ctx);

    if (cb_arg->proxy_auth) {
        if (ok > 0) {
            const char *cond_end = NULL;

            ok = process_proxy_cond(letters, cb_arg->proxy_cond, &cond_end);

            if (ok < 0)
                EXIT(3);
            if (*cond_end) {
                fprintf(stderr,
                        "Stopped processing condition before it's end.\n");
                ok = 0;
            }
            if (!ok)
                fprintf(stderr,
                        "Proxy rights check with condition '%s' invalid\n",
                        cb_arg->proxy_cond);
            else
                printf("Proxy rights check with condition '%s' ok\n",
                        cb_arg->proxy_cond);
        }
    }
    return (ok);
}

#ifndef OPENSSL_NO_RSA
static RSA *rsa_tmp = NULL;

static RSA *tmp_rsa_cb(SSL *s, int is_export, int keylength)
{
    BIGNUM *bn = NULL;
    if (rsa_tmp == NULL) {
        bn = BN_new();
        rsa_tmp = RSA_new();
        if (!bn || !rsa_tmp || !BN_set_word(bn, RSA_F4)) {
            BIO_printf(bio_err, "Memory error...");
            goto end;
        }
        printf("Generating temp (%d bit) RSA key...", keylength);
        if (!RSA_generate_key_ex(rsa_tmp, keylength, bn, NULL)) {
            BIO_printf(bio_err, "Error generating key.");
            RSA_free(rsa_tmp);
            rsa_tmp = NULL;
        }
 end:
        printf("\n");
    }
    BN_free(bn);
    return (rsa_tmp);
}

static void free_tmp_rsa(void)
{
    RSA_free(rsa_tmp);
    rsa_tmp = NULL;
}
#endif

#ifndef OPENSSL_NO_DH
/*-
 * These DH parameters have been generated as follows:
 *    $ openssl dhparam -C -noout 512
 *    $ openssl dhparam -C -noout 1024
 *    $ openssl dhparam -C -noout -dsaparam 1024
 * (The third function has been renamed to avoid name conflicts.)
 */
static DH *get_dh512()
{
    static unsigned char dh512_p[] = {
        0xCB, 0xC8, 0xE1, 0x86, 0xD0, 0x1F, 0x94, 0x17, 0xA6, 0x99, 0xF0,
        0xC6,
        0x1F, 0x0D, 0xAC, 0xB6, 0x25, 0x3E, 0x06, 0x39, 0xCA, 0x72, 0x04,
        0xB0,
        0x6E, 0xDA, 0xC0, 0x61, 0xE6, 0x7A, 0x77, 0x25, 0xE8, 0x3B, 0xB9,
        0x5F,
        0x9A, 0xB6, 0xB5, 0xFE, 0x99, 0x0B, 0xA1, 0x93, 0x4E, 0x35, 0x33,
        0xB8,
        0xE1, 0xF1, 0x13, 0x4F, 0x59, 0x1A, 0xD2, 0x57, 0xC0, 0x26, 0x21,
        0x33,
        0x02, 0xC5, 0xAE, 0x23,
    };
    static unsigned char dh512_g[] = {
        0x02,
    };
    DH *dh;

    if ((dh = DH_new()) == NULL)
        return (NULL);
    dh->p = BN_bin2bn(dh512_p, sizeof(dh512_p), NULL);
    dh->g = BN_bin2bn(dh512_g, sizeof(dh512_g), NULL);
    if ((dh->p == NULL) || (dh->g == NULL)) {
        DH_free(dh);
        return (NULL);
    }
    return (dh);
}

static DH *get_dh1024()
{
    static unsigned char dh1024_p[] = {
        0xF8, 0x81, 0x89, 0x7D, 0x14, 0x24, 0xC5, 0xD1, 0xE6, 0xF7, 0xBF,
        0x3A,
        0xE4, 0x90, 0xF4, 0xFC, 0x73, 0xFB, 0x34, 0xB5, 0xFA, 0x4C, 0x56,
        0xA2,
        0xEA, 0xA7, 0xE9, 0xC0, 0xC0, 0xCE, 0x89, 0xE1, 0xFA, 0x63, 0x3F,
        0xB0,
        0x6B, 0x32, 0x66, 0xF1, 0xD1, 0x7B, 0xB0, 0x00, 0x8F, 0xCA, 0x87,
        0xC2,
        0xAE, 0x98, 0x89, 0x26, 0x17, 0xC2, 0x05, 0xD2, 0xEC, 0x08, 0xD0,
        0x8C,
        0xFF, 0x17, 0x52, 0x8C, 0xC5, 0x07, 0x93, 0x03, 0xB1, 0xF6, 0x2F,
        0xB8,
        0x1C, 0x52, 0x47, 0x27, 0x1B, 0xDB, 0xD1, 0x8D, 0x9D, 0x69, 0x1D,
        0x52,
        0x4B, 0x32, 0x81, 0xAA, 0x7F, 0x00, 0xC8, 0xDC, 0xE6, 0xD9, 0xCC,
        0xC1,
        0x11, 0x2D, 0x37, 0x34, 0x6C, 0xEA, 0x02, 0x97, 0x4B, 0x0E, 0xBB,
        0xB1,
        0x71, 0x33, 0x09, 0x15, 0xFD, 0xDD, 0x23, 0x87, 0x07, 0x5E, 0x89,
        0xAB,
        0x6B, 0x7C, 0x5F, 0xEC, 0xA6, 0x24, 0xDC, 0x53,
    };
    static unsigned char dh1024_g[] = {
        0x02,
    };
    DH *dh;

    if ((dh = DH_new()) == NULL)
        return (NULL);
    dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
    dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
    if ((dh->p == NULL) || (dh->g == NULL)) {
        DH_free(dh);
        return (NULL);
    }
    return (dh);
}

static DH *get_dh1024dsa()
{
    static unsigned char dh1024_p[] = {
        0xC8, 0x00, 0xF7, 0x08, 0x07, 0x89, 0x4D, 0x90, 0x53, 0xF3, 0xD5,
        0x00,
        0x21, 0x1B, 0xF7, 0x31, 0xA6, 0xA2, 0xDA, 0x23, 0x9A, 0xC7, 0x87,
        0x19,
        0x3B, 0x47, 0xB6, 0x8C, 0x04, 0x6F, 0xFF, 0xC6, 0x9B, 0xB8, 0x65,
        0xD2,
        0xC2, 0x5F, 0x31, 0x83, 0x4A, 0xA7, 0x5F, 0x2F, 0x88, 0x38, 0xB6,
        0x55,
        0xCF, 0xD9, 0x87, 0x6D, 0x6F, 0x9F, 0xDA, 0xAC, 0xA6, 0x48, 0xAF,
        0xFC,
        0x33, 0x84, 0x37, 0x5B, 0x82, 0x4A, 0x31, 0x5D, 0xE7, 0xBD, 0x52,
        0x97,
        0xA1, 0x77, 0xBF, 0x10, 0x9E, 0x37, 0xEA, 0x64, 0xFA, 0xCA, 0x28,
        0x8D,
        0x9D, 0x3B, 0xD2, 0x6E, 0x09, 0x5C, 0x68, 0xC7, 0x45, 0x90, 0xFD,
        0xBB,
        0x70, 0xC9, 0x3A, 0xBB, 0xDF, 0xD4, 0x21, 0x0F, 0xC4, 0x6A, 0x3C,
        0xF6,
        0x61, 0xCF, 0x3F, 0xD6, 0x13, 0xF1, 0x5F, 0xBC, 0xCF, 0xBC, 0x26,
        0x9E,
        0xBC, 0x0B, 0xBD, 0xAB, 0x5D, 0xC9, 0x54, 0x39,
    };
    static unsigned char dh1024_g[] = {
        0x3B, 0x40, 0x86, 0xE7, 0xF3, 0x6C, 0xDE, 0x67, 0x1C, 0xCC, 0x80,
        0x05,
        0x5A, 0xDF, 0xFE, 0xBD, 0x20, 0x27, 0x74, 0x6C, 0x24, 0xC9, 0x03,
        0xF3,
        0xE1, 0x8D, 0xC3, 0x7D, 0x98, 0x27, 0x40, 0x08, 0xB8, 0x8C, 0x6A,
        0xE9,
        0xBB, 0x1A, 0x3A, 0xD6, 0x86, 0x83, 0x5E, 0x72, 0x41, 0xCE, 0x85,
        0x3C,
        0xD2, 0xB3, 0xFC, 0x13, 0xCE, 0x37, 0x81, 0x9E, 0x4C, 0x1C, 0x7B,
        0x65,
        0xD3, 0xE6, 0xA6, 0x00, 0xF5, 0x5A, 0x95, 0x43, 0x5E, 0x81, 0xCF,
        0x60,
        0xA2, 0x23, 0xFC, 0x36, 0xA7, 0x5D, 0x7A, 0x4C, 0x06, 0x91, 0x6E,
        0xF6,
        0x57, 0xEE, 0x36, 0xCB, 0x06, 0xEA, 0xF5, 0x3D, 0x95, 0x49, 0xCB,
        0xA7,
        0xDD, 0x81, 0xDF, 0x80, 0x09, 0x4A, 0x97, 0x4D, 0xA8, 0x22, 0x72,
        0xA1,
        0x7F, 0xC4, 0x70, 0x56, 0x70, 0xE8, 0x20, 0x10, 0x18, 0x8F, 0x2E,
        0x60,
        0x07, 0xE7, 0x68, 0x1A, 0x82, 0x5D, 0x32, 0xA2,
    };
    DH *dh;

    if ((dh = DH_new()) == NULL)
        return (NULL);
    dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
    dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
    if ((dh->p == NULL) || (dh->g == NULL)) {
        DH_free(dh);
        return (NULL);
    }
    dh->length = 160;
    return (dh);
}
#endif

#ifndef OPENSSL_NO_PSK
/* convert the PSK key (psk_key) in ascii to binary (psk) */
static int psk_key2bn(const char *pskkey, unsigned char *psk,
                      unsigned int max_psk_len)
{
    int ret;
    BIGNUM *bn = NULL;

    ret = BN_hex2bn(&bn, pskkey);
    if (!ret) {
        BIO_printf(bio_err, "Could not convert PSK key '%s' to BIGNUM\n",
                   pskkey);
        BN_free(bn);
        return 0;
    }
    if (BN_num_bytes(bn) > (int)max_psk_len) {
        BIO_printf(bio_err,
                   "psk buffer of callback is too small (%d) for key (%d)\n",
                   max_psk_len, BN_num_bytes(bn));
        BN_free(bn);
        return 0;
    }
    ret = BN_bn2bin(bn, psk);
    BN_free(bn);
    return ret;
}

static 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)
{
    int ret;
    unsigned int psk_len = 0;

    ret = BIO_snprintf(identity, max_identity_len, "Client_identity");
    if (ret < 0)
        goto out_err;
    if (debug)
        fprintf(stderr, "client: created identity '%s' len=%d\n", identity,
                ret);
    ret = psk_key2bn(psk_key, psk, max_psk_len);
    if (ret < 0)
        goto out_err;
    psk_len = ret;
 out_err:
    return psk_len;
}

static unsigned int psk_server_callback(SSL *ssl, const char *identity,
                                        unsigned char *psk,
                                        unsigned int max_psk_len)
{
    unsigned int psk_len = 0;

    if (strcmp(identity, "Client_identity") != 0) {
        BIO_printf(bio_err, "server: PSK error: client identity not found\n");
        return 0;
    }
    psk_len = psk_key2bn(psk_key, psk, max_psk_len);
    return psk_len;
}
#endif

static int do_test_cipherlist(void)
{
    int i = 0;
    const SSL_METHOD *meth;
    const SSL_CIPHER *ci, *tci = NULL;

#ifndef OPENSSL_NO_SSL3
    meth = SSLv3_method();
    tci = NULL;
    while ((ci = meth->get_cipher(i++)) != NULL) {
        if (tci != NULL)
            if (ci->id >= tci->id) {
                fprintf(stderr, "testing SSLv3 cipher list order: ");
                fprintf(stderr, "failed %lx vs. %lx\n", ci->id, tci->id);
                return 0;
            }
        tci = ci;
    }
#endif
    meth = TLSv1_method();
    tci = NULL;
    while ((ci = meth->get_cipher(i++)) != NULL) {
        if (tci != NULL)
            if (ci->id >= tci->id) {
                fprintf(stderr, "testing TLSv1 cipher list order: ");
                fprintf(stderr, "failed %lx vs. %lx\n", ci->id, tci->id);
                return 0;
            }
        tci = ci;
    }

    return 1;
}