Initial "opaque SSL" framework. If an application defines OPENSSL_NO_SSL_INTERN

[thirdparty/openssl.git] / apps / s_client.c

/* apps/s_client.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) 1998-2006 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 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.
 */

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/e_os2.h>
#ifdef OPENSSL_NO_STDIO
#define APPS_WIN16
#endif

/* With IPv6, it looks like Digital has mixed up the proper order of
   recursive header file inclusion, resulting in the compiler complaining
   that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
   is needed to have fileno() declared correctly...  So let's define u_int */
#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
#define __U_INT
typedef unsigned int u_int;
#endif

#define USE_SOCKETS
#include "apps.h"
#include <openssl/x509.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/ocsp.h>
#include <openssl/bn.h>
#ifndef OPENSSL_NO_SRP
#include <openssl/srp.h>
#endif
#include "s_apps.h"
#include "timeouts.h"

#if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
/* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
#undef FIONBIO
#endif

#if defined(OPENSSL_SYS_BEOS_R5)
#include <fcntl.h>
#endif

#undef PROG
#define PROG    s_client_main

/*#define SSL_HOST_NAME "www.netscape.com" */
/*#define SSL_HOST_NAME "193.118.187.102" */
#define SSL_HOST_NAME   "localhost"

/*#define TEST_CERT "client.pem" */ /* no default cert. */

#undef BUFSIZZ
#define BUFSIZZ 1024*8

extern int verify_depth;
extern int verify_error;
extern int verify_return_error;

#ifdef FIONBIO
static int c_nbio=0;
#endif
static int c_Pause=0;
static int c_debug=0;
#ifndef OPENSSL_NO_TLSEXT
static int c_tlsextdebug=0;
static int c_status_req=0;
#endif
static int c_msg=0;
static int c_showcerts=0;

static void sc_usage(void);
static void print_stuff(BIO *berr,SSL *con,int full);
#ifndef OPENSSL_NO_TLSEXT
static int ocsp_resp_cb(SSL *s, void *arg);
#endif
static BIO *bio_c_out=NULL;
static int c_quiet=0;
static int c_ign_eof=0;

#ifndef OPENSSL_NO_PSK
/* Default PSK identity and key */
static char *psk_identity="Client_identity";
/*char *psk_key=NULL;  by default PSK is not used */

static unsigned int psk_client_cb(SSL *ssl, const char *hint, char *identity,
        unsigned int max_identity_len, unsigned char *psk,
        unsigned int max_psk_len)
        {
        unsigned int psk_len = 0;
        int ret;
        BIGNUM *bn=NULL;

        if (c_debug)
                BIO_printf(bio_c_out, "psk_client_cb\n");
        if (!hint)
                {
                /* no ServerKeyExchange message*/
                if (c_debug)
                        BIO_printf(bio_c_out,"NULL received PSK identity hint, continuing anyway\n");
                }
        else if (c_debug)
                BIO_printf(bio_c_out, "Received PSK identity hint '%s'\n", hint);

        /* lookup PSK identity and PSK key based on the given identity hint here */
        ret = BIO_snprintf(identity, max_identity_len, "%s", psk_identity);
        if (ret < 0 || (unsigned int)ret > max_identity_len)
                goto out_err;
        if (c_debug)
                BIO_printf(bio_c_out, "created identity '%s' len=%d\n", identity, ret);
        ret=BN_hex2bn(&bn, psk_key);
        if (!ret)
                {
                BIO_printf(bio_err,"Could not convert PSK key '%s' to BIGNUM\n", psk_key);
                if (bn)
                        BN_free(bn);
                return 0;
                }

        if ((unsigned int)BN_num_bytes(bn) > 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;
                }

        psk_len=BN_bn2bin(bn, psk);
        BN_free(bn);
        if (psk_len == 0)
                goto out_err;

        if (c_debug)
                BIO_printf(bio_c_out, "created PSK len=%d\n", psk_len);

        return psk_len;
 out_err:
        if (c_debug)
                BIO_printf(bio_err, "Error in PSK client callback\n");
        return 0;
        }
#endif

static void sc_usage(void)
        {
        BIO_printf(bio_err,"usage: s_client args\n");
        BIO_printf(bio_err,"\n");
        BIO_printf(bio_err," -host host     - use -connect instead\n");
        BIO_printf(bio_err," -port port     - use -connect instead\n");
        BIO_printf(bio_err," -connect host:port - who to connect to (default is %s:%s)\n",SSL_HOST_NAME,PORT_STR);

        BIO_printf(bio_err," -verify arg   - turn on peer certificate verification\n");
        BIO_printf(bio_err," -cert arg     - certificate file to use, PEM format assumed\n");
        BIO_printf(bio_err," -certform arg - certificate format (PEM or DER) PEM default\n");
        BIO_printf(bio_err," -key arg      - Private key file to use, in cert file if\n");
        BIO_printf(bio_err,"                 not specified but cert file is.\n");
        BIO_printf(bio_err," -keyform arg  - key format (PEM or DER) PEM default\n");
        BIO_printf(bio_err," -pass arg     - private key file pass phrase source\n");
        BIO_printf(bio_err," -CApath arg   - PEM format directory of CA's\n");
        BIO_printf(bio_err," -CAfile arg   - PEM format file of CA's\n");
        BIO_printf(bio_err," -reconnect    - Drop and re-make the connection with the same Session-ID\n");
        BIO_printf(bio_err," -pause        - sleep(1) after each read(2) and write(2) system call\n");
        BIO_printf(bio_err," -showcerts    - show all certificates in the chain\n");
        BIO_printf(bio_err," -debug        - extra output\n");
#ifdef WATT32
        BIO_printf(bio_err," -wdebug       - WATT-32 tcp debugging\n");
#endif
        BIO_printf(bio_err," -msg          - Show protocol messages\n");
        BIO_printf(bio_err," -nbio_test    - more ssl protocol testing\n");
        BIO_printf(bio_err," -state        - print the 'ssl' states\n");
#ifdef FIONBIO
        BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");
#endif
        BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");
        BIO_printf(bio_err," -quiet        - no s_client output\n");
        BIO_printf(bio_err," -ign_eof      - ignore input eof (default when -quiet)\n");
        BIO_printf(bio_err," -no_ign_eof   - don't ignore input eof\n");
#ifndef OPENSSL_NO_PSK
        BIO_printf(bio_err," -psk_identity arg - PSK identity\n");
        BIO_printf(bio_err," -psk arg      - PSK in hex (without 0x)\n");
# ifndef OPENSSL_NO_JPAKE
        BIO_printf(bio_err," -jpake arg    - JPAKE secret to use\n");
# endif
#endif
#ifndef OPENSSL_NO_SRP
        BIO_printf(bio_err," -srpuser user     - SRP authentification for 'user'\n");
        BIO_printf(bio_err," -srppass arg      - password for 'user'\n");
        BIO_printf(bio_err," -srp_lateuser     - SRP username into second ClientHello message\n");
        BIO_printf(bio_err," -srp_moregroups   - Tolerate other than the known g N values.\n");
        BIO_printf(bio_err," -srp_strength int - minimal mength in bits for N (default %d).\n",SRP_MINIMAL_N);
#endif
        BIO_printf(bio_err," -ssl2         - just use SSLv2\n");
        BIO_printf(bio_err," -ssl3         - just use SSLv3\n");
        BIO_printf(bio_err," -tls1_1       - just use TLSv1.1\n");
        BIO_printf(bio_err," -tls1         - just use TLSv1\n");
        BIO_printf(bio_err," -dtls1        - just use DTLSv1\n");    
        BIO_printf(bio_err," -mtu          - set the link layer MTU\n");
        BIO_printf(bio_err," -no_tls1_1/-no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
        BIO_printf(bio_err," -bugs         - Switch on all SSL implementation bug workarounds\n");
        BIO_printf(bio_err," -serverpref   - Use server's cipher preferences (only SSLv2)\n");
        BIO_printf(bio_err," -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");
        BIO_printf(bio_err,"                 command to see what is available\n");
        BIO_printf(bio_err," -starttls prot - use the STARTTLS command before starting TLS\n");
        BIO_printf(bio_err,"                 for those protocols that support it, where\n");
        BIO_printf(bio_err,"                 'prot' defines which one to assume.  Currently,\n");
        BIO_printf(bio_err,"                 only \"smtp\", \"pop3\", \"imap\", \"ftp\" and \"xmpp\"\n");
        BIO_printf(bio_err,"                 are supported.\n");
#ifndef OPENSSL_NO_ENGINE
        BIO_printf(bio_err," -engine id    - Initialise and use the specified engine\n");
#endif
        BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
        BIO_printf(bio_err," -sess_out arg - file to write SSL session to\n");
        BIO_printf(bio_err," -sess_in arg  - file to read SSL session from\n");
#ifndef OPENSSL_NO_TLSEXT
        BIO_printf(bio_err," -servername host  - Set TLS extension servername in ClientHello\n");
        BIO_printf(bio_err," -tlsextdebug      - hex dump of all TLS extensions received\n");
        BIO_printf(bio_err," -status           - request certificate status from server\n");
        BIO_printf(bio_err," -no_ticket        - disable use of RFC4507bis session tickets\n");
#endif
        BIO_printf(bio_err," -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n");
        }

#ifndef OPENSSL_NO_TLSEXT

/* This is a context that we pass to callbacks */
typedef struct tlsextctx_st {
   BIO * biodebug;
   int ack;
} tlsextctx;


static int MS_CALLBACK ssl_servername_cb(SSL *s, int *ad, void *arg)
        {
        tlsextctx * p = (tlsextctx *) arg;
        const char * hn= SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
        if (SSL_get_servername_type(s) != -1) 
                p->ack = !SSL_session_reused(s) && hn != NULL;
        else 
                BIO_printf(bio_err,"Can't use SSL_get_servername\n");
        
        return SSL_TLSEXT_ERR_OK;
        }

#ifndef OPENSSL_NO_SRP

/* This is a context that we pass to all callbacks */
typedef struct srp_arg_st
        {
        char *srppassin;
        char *srplogin;
        int msg;   /* copy from c_msg */
        int debug; /* copy from c_debug */
        int amp;   /* allow more groups */
        int strength /* minimal size for N */ ;
        } SRP_ARG;

#define SRP_NUMBER_ITERATIONS_FOR_PRIME 64

static int SRP_Verify_N_and_g(BIGNUM *N, BIGNUM *g)
        {
        BN_CTX *bn_ctx = BN_CTX_new();
        BIGNUM *p = BN_new();
        BIGNUM *r = BN_new();
        int ret =
                g != NULL && N != NULL && bn_ctx != NULL && BN_is_odd(N) &&
                BN_is_prime_ex(N, SRP_NUMBER_ITERATIONS_FOR_PRIME, bn_ctx, NULL) &&
                p != NULL && BN_rshift1(p, N) &&

                /* p = (N-1)/2 */
                BN_is_prime_ex(p, SRP_NUMBER_ITERATIONS_FOR_PRIME, bn_ctx, NULL) &&
                r != NULL &&

                /* verify g^((N-1)/2) == -1 (mod N) */
                BN_mod_exp(r, g, p, N, bn_ctx) &&
                BN_add_word(r, 1) &&
                BN_cmp(r, N) == 0;

        if(r)
                BN_free(r);
        if(p)
                BN_free(p);
        if(bn_ctx)
                BN_CTX_free(bn_ctx);
        return ret;
        }

static int MS_CALLBACK ssl_srp_verify_param_cb(SSL *s, void *arg)
        {
        SRP_ARG *srp_arg = (SRP_ARG *)arg;
        BIGNUM *N = NULL, *g = NULL;
        if (!(N = SSL_get_srp_N(s)) || !(g = SSL_get_srp_g(s)))
                return 0;
        if (srp_arg->debug || srp_arg->msg || srp_arg->amp == 1)
                {
                BIO_printf(bio_err, "SRP parameters:\n"); 
                BIO_printf(bio_err,"\tN="); BN_print(bio_err,N);
                BIO_printf(bio_err,"\n\tg="); BN_print(bio_err,g);
                BIO_printf(bio_err,"\n");
                }

        if (SRP_check_known_gN_param(g,N))
                return 1;

        if (srp_arg->amp == 1)
                {
                if (srp_arg->debug)
                        BIO_printf(bio_err, "SRP param N and g are not known params, going to check deeper.\n");

/* The srp_moregroups must be used with caution, testing primes costs time. 
   Implementors should rather add the value to the known ones.
   The minimal size has already been tested.
*/
                if (BN_num_bits(g) <= BN_BITS && SRP_Verify_N_and_g(N,g))
                        return 1;
                }       
        BIO_printf(bio_err, "SRP param N and g rejected.\n");
        return 0;
        }

#define PWD_STRLEN 1024

static char * MS_CALLBACK ssl_give_srp_client_pwd_cb(SSL *s, void *arg)
        {
        SRP_ARG *srp_arg = (SRP_ARG *)arg;
        char *pass = (char *)OPENSSL_malloc(PWD_STRLEN+1);
        PW_CB_DATA cb_tmp;
        int l;

        cb_tmp.password = (char *)srp_arg->srppassin;
        cb_tmp.prompt_info = "SRP user";
        if ((l = password_callback(pass, PWD_STRLEN, 0, &cb_tmp))<0)
                {
                BIO_printf (bio_err, "Can't read Password\n");
                OPENSSL_free(pass);
                return NULL;
                }
        *(pass+l)= '\0';

        return pass;
        }

static char * MS_CALLBACK missing_srp_username_callback(SSL *s, void *arg)
        {
        SRP_ARG *srp_arg = (SRP_ARG *)arg;
        return BUF_strdup(srp_arg->srplogin);
        }

#endif
#endif

enum
{
        PROTO_OFF       = 0,
        PROTO_SMTP,
        PROTO_POP3,
        PROTO_IMAP,
        PROTO_FTP,
        PROTO_XMPP
};

int MAIN(int, char **);

int MAIN(int argc, char **argv)
        {
        unsigned int off=0, clr=0;
        SSL *con=NULL;
        int s,k,width,state=0;
        char *cbuf=NULL,*sbuf=NULL,*mbuf=NULL;
        int cbuf_len,cbuf_off;
        int sbuf_len,sbuf_off;
        fd_set readfds,writefds;
        short port=PORT;
        int full_log=1;
        char *host=SSL_HOST_NAME;
        char *cert_file=NULL,*key_file=NULL;
        int cert_format = FORMAT_PEM, key_format = FORMAT_PEM;
        char *passarg = NULL, *pass = NULL;
        X509 *cert = NULL;
        EVP_PKEY *key = NULL;
        char *CApath=NULL,*CAfile=NULL,*cipher=NULL;
        int reconnect=0,badop=0,verify=SSL_VERIFY_NONE,bugs=0;
        int crlf=0;
        int write_tty,read_tty,write_ssl,read_ssl,tty_on,ssl_pending;
        SSL_CTX *ctx=NULL;
        int ret=1,in_init=1,i,nbio_test=0;
        int starttls_proto = PROTO_OFF;
        int prexit = 0;
        X509_VERIFY_PARAM *vpm = NULL;
        int badarg = 0;
        const SSL_METHOD *meth=NULL;
        int socket_type=SOCK_STREAM;
        BIO *sbio;
        char *inrand=NULL;
        int mbuf_len=0;
        struct timeval timeout, *timeoutp;
#ifndef OPENSSL_NO_ENGINE
        char *engine_id=NULL;
        char *ssl_client_engine_id=NULL;
        ENGINE *ssl_client_engine=NULL;
#endif
        ENGINE *e=NULL;
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_BEOS_R5)
        struct timeval tv;
#if defined(OPENSSL_SYS_BEOS_R5)
        int stdin_set = 0;
#endif
#endif
#ifndef OPENSSL_NO_TLSEXT
        char *servername = NULL; 
        tlsextctx tlsextcbp = 
        {NULL,0};
#endif
        char *sess_in = NULL;
        char *sess_out = NULL;
        struct sockaddr peer;
        int peerlen = sizeof(peer);
        int enable_timeouts = 0 ;
        long socket_mtu = 0;
#ifndef OPENSSL_NO_JPAKE
        char *jpake_secret = NULL;
#endif
#ifndef OPENSSL_NO_SRP
        char * srppass = NULL;
        int srp_lateuser = 0;
        SRP_ARG srp_arg = {NULL,NULL,0,0,0,1024};
#endif

#if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
        meth=SSLv23_client_method();
#elif !defined(OPENSSL_NO_SSL3)
        meth=SSLv3_client_method();
#elif !defined(OPENSSL_NO_SSL2)
        meth=SSLv2_client_method();
#endif

        apps_startup();
        c_Pause=0;
        c_quiet=0;
        c_ign_eof=0;
        c_debug=0;
        c_msg=0;
        c_showcerts=0;

        if (bio_err == NULL)
                bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);

        if (!load_config(bio_err, NULL))
                goto end;

        if (    ((cbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||
                ((sbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||
                ((mbuf=OPENSSL_malloc(BUFSIZZ)) == NULL))
                {
                BIO_printf(bio_err,"out of memory\n");
                goto end;
                }

        verify_depth=0;
        verify_error=X509_V_OK;
#ifdef FIONBIO
        c_nbio=0;
#endif

        argc--;
        argv++;
        while (argc >= 1)
                {
                if      (strcmp(*argv,"-host") == 0)
                        {
                        if (--argc < 1) goto bad;
                        host= *(++argv);
                        }
                else if (strcmp(*argv,"-port") == 0)
                        {
                        if (--argc < 1) goto bad;
                        port=atoi(*(++argv));
                        if (port == 0) goto bad;
                        }
                else if (strcmp(*argv,"-connect") == 0)
                        {
                        if (--argc < 1) goto bad;
                        if (!extract_host_port(*(++argv),&host,NULL,&port))
                                goto bad;
                        }
                else if (strcmp(*argv,"-verify") == 0)
                        {
                        verify=SSL_VERIFY_PEER;
                        if (--argc < 1) goto bad;
                        verify_depth=atoi(*(++argv));
                        BIO_printf(bio_err,"verify depth is %d\n",verify_depth);
                        }
                else if (strcmp(*argv,"-cert") == 0)
                        {
                        if (--argc < 1) goto bad;
                        cert_file= *(++argv);
                        }
                else if (strcmp(*argv,"-sess_out") == 0)
                        {
                        if (--argc < 1) goto bad;
                        sess_out = *(++argv);
                        }
                else if (strcmp(*argv,"-sess_in") == 0)
                        {
                        if (--argc < 1) goto bad;
                        sess_in = *(++argv);
                        }
                else if (strcmp(*argv,"-certform") == 0)
                        {
                        if (--argc < 1) goto bad;
                        cert_format = str2fmt(*(++argv));
                        }
                else if (args_verify(&argv, &argc, &badarg, bio_err, &vpm))
                        {
                        if (badarg)
                                goto bad;
                        continue;
                        }
                else if (strcmp(*argv,"-verify_return_error") == 0)
                        verify_return_error = 1;
                else if (strcmp(*argv,"-prexit") == 0)
                        prexit=1;
                else if (strcmp(*argv,"-crlf") == 0)
                        crlf=1;
                else if (strcmp(*argv,"-quiet") == 0)
                        {
                        c_quiet=1;
                        c_ign_eof=1;
                        }
                else if (strcmp(*argv,"-ign_eof") == 0)
                        c_ign_eof=1;
                else if (strcmp(*argv,"-no_ign_eof") == 0)
                        c_ign_eof=0;
                else if (strcmp(*argv,"-pause") == 0)
                        c_Pause=1;
                else if (strcmp(*argv,"-debug") == 0)
                        c_debug=1;
#ifndef OPENSSL_NO_TLSEXT
                else if (strcmp(*argv,"-tlsextdebug") == 0)
                        c_tlsextdebug=1;
                else if (strcmp(*argv,"-status") == 0)
                        c_status_req=1;
#endif
#ifdef WATT32
                else if (strcmp(*argv,"-wdebug") == 0)
                        dbug_init();
#endif
                else if (strcmp(*argv,"-msg") == 0)
                        c_msg=1;
                else if (strcmp(*argv,"-showcerts") == 0)
                        c_showcerts=1;
                else if (strcmp(*argv,"-nbio_test") == 0)
                        nbio_test=1;
                else if (strcmp(*argv,"-state") == 0)
                        state=1;
#ifndef OPENSSL_NO_PSK
                else if (strcmp(*argv,"-psk_identity") == 0)
                        {
                        if (--argc < 1) goto bad;
                        psk_identity=*(++argv);
                        }
                else if (strcmp(*argv,"-psk") == 0)
                        {
                        size_t j;

                        if (--argc < 1) goto bad;
                        psk_key=*(++argv);
                        for (j = 0; j < strlen(psk_key); j++)
                                {
                                if (isxdigit((int)psk_key[j]))
                                        continue;
                                BIO_printf(bio_err,"Not a hex number '%s'\n",*argv);
                                goto bad;
                                }
                        }
#endif
#ifndef OPENSSL_NO_SRP
                else if (strcmp(*argv,"-srpuser") == 0)
                        {
                        if (--argc < 1) goto bad;
                        srp_arg.srplogin= *(++argv);
                        meth=TLSv1_client_method();
                        }
                else if (strcmp(*argv,"-srppass") == 0)
                        {
                        if (--argc < 1) goto bad;
                        srppass= *(++argv);
                        meth=TLSv1_client_method();
                        }
                else if (strcmp(*argv,"-srp_strength") == 0)
                        {
                        if (--argc < 1) goto bad;
                        srp_arg.strength=atoi(*(++argv));
                        BIO_printf(bio_err,"SRP minimal length for N is %d\n",srp_arg.strength);
                        meth=TLSv1_client_method();
                        }
                else if (strcmp(*argv,"-srp_lateuser") == 0)
                        {
                        srp_lateuser= 1;
                        meth=TLSv1_client_method();
                        }
                else if (strcmp(*argv,"-srp_moregroups") == 0)
                        {
                        srp_arg.amp=1;
                        meth=TLSv1_client_method();
                        }
#endif
#ifndef OPENSSL_NO_SSL2
                else if (strcmp(*argv,"-ssl2") == 0)
                        meth=SSLv2_client_method();
#endif
#ifndef OPENSSL_NO_SSL3
                else if (strcmp(*argv,"-ssl3") == 0)
                        meth=SSLv3_client_method();
#endif
#ifndef OPENSSL_NO_TLS1
                else if (strcmp(*argv,"-tls1_1") == 0)
                        meth=TLSv1_1_client_method();
                else if (strcmp(*argv,"-tls1") == 0)
                        meth=TLSv1_client_method();
#endif
#ifndef OPENSSL_NO_DTLS1
                else if (strcmp(*argv,"-dtls1") == 0)
                        {
                        meth=DTLSv1_client_method();
                        socket_type=SOCK_DGRAM;
                        }
                else if (strcmp(*argv,"-timeout") == 0)
                        enable_timeouts=1;
                else if (strcmp(*argv,"-mtu") == 0)
                        {
                        if (--argc < 1) goto bad;
                        socket_mtu = atol(*(++argv));
                        }
#endif
                else if (strcmp(*argv,"-bugs") == 0)
                        bugs=1;
                else if (strcmp(*argv,"-keyform") == 0)
                        {
                        if (--argc < 1) goto bad;
                        key_format = str2fmt(*(++argv));
                        }
                else if (strcmp(*argv,"-pass") == 0)
                        {
                        if (--argc < 1) goto bad;
                        passarg = *(++argv);
                        }
                else if (strcmp(*argv,"-key") == 0)
                        {
                        if (--argc < 1) goto bad;
                        key_file= *(++argv);
                        }
                else if (strcmp(*argv,"-reconnect") == 0)
                        {
                        reconnect=5;
                        }
                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,"-no_tls1_1") == 0)
                        off|=SSL_OP_NO_TLSv1_1;
                else if (strcmp(*argv,"-no_tls1") == 0)
                        off|=SSL_OP_NO_TLSv1;
                else if (strcmp(*argv,"-no_ssl3") == 0)
                        off|=SSL_OP_NO_SSLv3;
                else if (strcmp(*argv,"-no_ssl2") == 0)
                        off|=SSL_OP_NO_SSLv2;
                else if (strcmp(*argv,"-no_comp") == 0)
                        { off|=SSL_OP_NO_COMPRESSION; }
#ifndef OPENSSL_NO_TLSEXT
                else if (strcmp(*argv,"-no_ticket") == 0)
                        { off|=SSL_OP_NO_TICKET; }
#endif
                else if (strcmp(*argv,"-serverpref") == 0)
                        off|=SSL_OP_CIPHER_SERVER_PREFERENCE;
                else if (strcmp(*argv,"-legacy_renegotiation") == 0)
                        off|=SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION;
                else if (strcmp(*argv,"-legacy_server_connect") == 0)
                        { off|=SSL_OP_LEGACY_SERVER_CONNECT; }
                else if (strcmp(*argv,"-no_legacy_server_connect") == 0)
                        { clr|=SSL_OP_LEGACY_SERVER_CONNECT; }
                else if (strcmp(*argv,"-cipher") == 0)
                        {
                        if (--argc < 1) goto bad;
                        cipher= *(++argv);
                        }
#ifdef FIONBIO
                else if (strcmp(*argv,"-nbio") == 0)
                        { c_nbio=1; }
#endif
                else if (strcmp(*argv,"-starttls") == 0)
                        {
                        if (--argc < 1) goto bad;
                        ++argv;
                        if (strcmp(*argv,"smtp") == 0)
                                starttls_proto = PROTO_SMTP;
                        else if (strcmp(*argv,"pop3") == 0)
                                starttls_proto = PROTO_POP3;
                        else if (strcmp(*argv,"imap") == 0)
                                starttls_proto = PROTO_IMAP;
                        else if (strcmp(*argv,"ftp") == 0)
                                starttls_proto = PROTO_FTP;
                        else if (strcmp(*argv, "xmpp") == 0)
                                starttls_proto = PROTO_XMPP;
                        else
                                goto bad;
                        }
#ifndef OPENSSL_NO_ENGINE
                else if (strcmp(*argv,"-engine") == 0)
                        {
                        if (--argc < 1) goto bad;
                        engine_id = *(++argv);
                        }
                else if (strcmp(*argv,"-ssl_client_engine") == 0)
                        {
                        if (--argc < 1) goto bad;
                        ssl_client_engine_id = *(++argv);
                        }
#endif
                else if (strcmp(*argv,"-rand") == 0)
                        {
                        if (--argc < 1) goto bad;
                        inrand= *(++argv);
                        }
#ifndef OPENSSL_NO_TLSEXT
                else if (strcmp(*argv,"-servername") == 0)
                        {
                        if (--argc < 1) goto bad;
                        servername= *(++argv);
                        /* meth=TLSv1_client_method(); */
                        }
#endif
#ifndef OPENSSL_NO_JPAKE
                else if (strcmp(*argv,"-jpake") == 0)
                        {
                        if (--argc < 1) goto bad;
                        jpake_secret = *++argv;
                        }
#endif
                else
                        {
                        BIO_printf(bio_err,"unknown option %s\n",*argv);
                        badop=1;
                        break;
                        }
                argc--;
                argv++;
                }
        if (badop)
                {
bad:
                sc_usage();
                goto end;
                }

#if !defined(OPENSSL_NO_JPAKE) && !defined(OPENSSL_NO_PSK)
        if (jpake_secret)
                {
                if (psk_key)
                        {
                        BIO_printf(bio_err,
                                   "Can't use JPAKE and PSK together\n");
                        goto end;
                        }
                psk_identity = "JPAKE";
                }

        if (cipher)
                {
                BIO_printf(bio_err, "JPAKE sets cipher to PSK\n");
                goto end;
                }
        cipher = "PSK";
#endif

        OpenSSL_add_ssl_algorithms();
        SSL_load_error_strings();

#ifndef OPENSSL_NO_ENGINE
        e = setup_engine(bio_err, engine_id, 1);
        if (ssl_client_engine_id)
                {
                ssl_client_engine = ENGINE_by_id(ssl_client_engine_id);
                if (!ssl_client_engine)
                        {
                        BIO_printf(bio_err,
                                        "Error getting client auth engine\n");
                        goto end;
                        }
                }

#endif
        if (!app_passwd(bio_err, passarg, NULL, &pass, NULL))
                {
                BIO_printf(bio_err, "Error getting password\n");
                goto end;
                }

        if (key_file == NULL)
                key_file = cert_file;


        if (key_file)

                {

                key = load_key(bio_err, key_file, key_format, 0, pass, e,
                               "client certificate private key file");
                if (!key)
                        {
                        ERR_print_errors(bio_err);
                        goto end;
                        }

                }

        if (cert_file)

                {
                cert = load_cert(bio_err,cert_file,cert_format,
                                NULL, e, "client certificate file");

                if (!cert)
                        {
                        ERR_print_errors(bio_err);
                        goto end;
                        }
                }

        if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
                && !RAND_status())
                {
                BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
                }
        if (inrand != NULL)
                BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
                        app_RAND_load_files(inrand));

        if (bio_c_out == NULL)
                {
                if (c_quiet && !c_debug && !c_msg)
                        {
                        bio_c_out=BIO_new(BIO_s_null());
                        }
                else
                        {
                        if (bio_c_out == NULL)
                                bio_c_out=BIO_new_fp(stdout,BIO_NOCLOSE);
                        }
                }

#ifndef OPENSSL_NO_SRP
        if(!app_passwd(bio_err, srppass, NULL, &srp_arg.srppassin, NULL))
                {
                BIO_printf(bio_err, "Error getting password\n");
                goto end;
                }
#endif

        ctx=SSL_CTX_new(meth);
        if (ctx == NULL)
                {
                ERR_print_errors(bio_err);
                goto end;
                }

        if (vpm)
                SSL_CTX_set1_param(ctx, vpm);

#ifndef OPENSSL_NO_ENGINE
        if (ssl_client_engine)
                {
                if (!SSL_CTX_set_client_cert_engine(ctx, ssl_client_engine))
                        {
                        BIO_puts(bio_err, "Error setting client auth engine\n");
                        ERR_print_errors(bio_err);
                        ENGINE_free(ssl_client_engine);
                        goto end;
                        }
                ENGINE_free(ssl_client_engine);
                }
#endif

#ifndef OPENSSL_NO_PSK
#ifdef OPENSSL_NO_JPAKE
        if (psk_key != NULL)
#else
        if (psk_key != NULL || jpake_secret)
#endif
                {
                if (c_debug)
                        BIO_printf(bio_c_out, "PSK key given or JPAKE in use, setting client callback\n");
                SSL_CTX_set_psk_client_callback(ctx, psk_client_cb);
                }
#endif
        if (bugs)
                SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
        else
                SSL_CTX_set_options(ctx,off);

        if (clr)
                SSL_CTX_clear_options(ctx, clr);
        /* DTLS: partial reads end up discarding unread UDP bytes :-( 
         * Setting read ahead solves this problem.
         */
        if (socket_type == SOCK_DGRAM) SSL_CTX_set_read_ahead(ctx, 1);

        if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
        if (cipher != NULL)
                if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
                BIO_printf(bio_err,"error setting cipher list\n");
                ERR_print_errors(bio_err);
                goto end;
        }
#if 0
        else
                SSL_CTX_set_cipher_list(ctx,getenv("SSL_CIPHER"));
#endif

        SSL_CTX_set_verify(ctx,verify,verify_callback);
        if (!set_cert_key_stuff(ctx,cert,key))
                goto end;

        if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||
                (!SSL_CTX_set_default_verify_paths(ctx)))
                {
                /* BIO_printf(bio_err,"error setting default verify locations\n"); */
                ERR_print_errors(bio_err);
                /* goto end; */
                }

#ifndef OPENSSL_NO_TLSEXT
        if (servername != NULL)
                {
                tlsextcbp.biodebug = bio_err;
                SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
                SSL_CTX_set_tlsext_servername_arg(ctx, &tlsextcbp);
                }
#ifndef OPENSSL_NO_SRP
        if (srp_arg.srplogin)
                {
                if (srp_lateuser) 
                        SSL_CTX_set_srp_missing_srp_username_callback(ctx,missing_srp_username_callback);
                else if (!SSL_CTX_set_srp_username(ctx, srp_arg.srplogin))
                        {
                        BIO_printf(bio_err,"Unable to set SRP username\n");
                        goto end;
                        }
                srp_arg.msg = c_msg;
                srp_arg.debug = c_debug ;
                SSL_CTX_set_srp_cb_arg(ctx,&srp_arg);
                SSL_CTX_set_srp_client_pwd_callback(ctx, ssl_give_srp_client_pwd_cb);
                SSL_CTX_set_srp_strength(ctx, srp_arg.strength);
                if (c_msg || c_debug || srp_arg.amp == 0)
                        SSL_CTX_set_srp_verify_param_callback(ctx, ssl_srp_verify_param_cb);
                }

#endif
#endif

        con=SSL_new(ctx);
        if (sess_in)
                {
                SSL_SESSION *sess;
                BIO *stmp = BIO_new_file(sess_in, "r");
                if (!stmp)
                        {
                        BIO_printf(bio_err, "Can't open session file %s\n",
                                                sess_in);
                        ERR_print_errors(bio_err);
                        goto end;
                        }
                sess = PEM_read_bio_SSL_SESSION(stmp, NULL, 0, NULL);
                BIO_free(stmp);
                if (!sess)
                        {
                        BIO_printf(bio_err, "Can't open session file %s\n",
                                                sess_in);
                        ERR_print_errors(bio_err);
                        goto end;
                        }
                SSL_set_session(con, sess);
                SSL_SESSION_free(sess);
                }
#ifndef OPENSSL_NO_TLSEXT
        if (servername != NULL)
                {
                if (!SSL_set_tlsext_host_name(con,servername))
                        {
                        BIO_printf(bio_err,"Unable to set TLS servername extension.\n");
                        ERR_print_errors(bio_err);
                        goto end;
                        }
                }
#endif
#ifndef OPENSSL_NO_KRB5
        if (con  &&  (con->kssl_ctx = kssl_ctx_new()) != NULL)
                {
                kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVER, host);
                }
#endif  /* OPENSSL_NO_KRB5  */
/*      SSL_set_cipher_list(con,"RC4-MD5"); */
#if 0
#ifdef TLSEXT_TYPE_opaque_prf_input
        SSL_set_tlsext_opaque_prf_input(con, "Test client", 11);
#endif
#endif

re_start:

        if (init_client(&s,host,port,socket_type) == 0)
                {
                BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());
                SHUTDOWN(s);
                goto end;
                }
        BIO_printf(bio_c_out,"CONNECTED(%08X)\n",s);

#ifdef FIONBIO
        if (c_nbio)
                {
                unsigned long l=1;
                BIO_printf(bio_c_out,"turning on non blocking io\n");
                if (BIO_socket_ioctl(s,FIONBIO,&l) < 0)
                        {
                        ERR_print_errors(bio_err);
                        goto end;
                        }
                }
#endif                                              
        if (c_Pause & 0x01) SSL_set_debug(con, 1);

        if ( SSL_version(con) == DTLS1_VERSION)
                {

                sbio=BIO_new_dgram(s,BIO_NOCLOSE);
                if (getsockname(s, &peer, (void *)&peerlen) < 0)
                        {
                        BIO_printf(bio_err, "getsockname:errno=%d\n",
                                get_last_socket_error());
                        SHUTDOWN(s);
                        goto end;
                        }

                (void)BIO_ctrl_set_connected(sbio, 1, &peer);

                if (enable_timeouts)
                        {
                        timeout.tv_sec = 0;
                        timeout.tv_usec = DGRAM_RCV_TIMEOUT;
                        BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout);
                        
                        timeout.tv_sec = 0;
                        timeout.tv_usec = DGRAM_SND_TIMEOUT;
                        BIO_ctrl(sbio, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT, 0, &timeout);
                        }

                if (socket_mtu > 28)
                        {
                        SSL_set_options(con, SSL_OP_NO_QUERY_MTU);
                        SSL_set_mtu(con, socket_mtu - 28);
                        }
                else
                        /* want to do MTU discovery */
                        BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);
                }
        else
                sbio=BIO_new_socket(s,BIO_NOCLOSE);

        if (nbio_test)
                {
                BIO *test;

                test=BIO_new(BIO_f_nbio_test());
                sbio=BIO_push(test,sbio);
                }

        if (c_debug)
                {
                SSL_set_debug(con, 1);
                BIO_set_callback(sbio,bio_dump_callback);
                BIO_set_callback_arg(sbio,(char *)bio_c_out);
                }
        if (c_msg)
                {
                SSL_set_msg_callback(con, msg_cb);
                SSL_set_msg_callback_arg(con, bio_c_out);
                }
#ifndef OPENSSL_NO_TLSEXT
        if (c_tlsextdebug)
                {
                SSL_set_tlsext_debug_callback(con, tlsext_cb);
                SSL_set_tlsext_debug_arg(con, bio_c_out);
                }
        if (c_status_req)
                {
                SSL_set_tlsext_status_type(con, TLSEXT_STATUSTYPE_ocsp);
                SSL_CTX_set_tlsext_status_cb(ctx, ocsp_resp_cb);
                SSL_CTX_set_tlsext_status_arg(ctx, bio_c_out);
#if 0
{
STACK_OF(OCSP_RESPID) *ids = sk_OCSP_RESPID_new_null();
OCSP_RESPID *id = OCSP_RESPID_new();
id->value.byKey = ASN1_OCTET_STRING_new();
id->type = V_OCSP_RESPID_KEY;
ASN1_STRING_set(id->value.byKey, "Hello World", -1);
sk_OCSP_RESPID_push(ids, id);
SSL_set_tlsext_status_ids(con, ids);
}
#endif
                }
#endif
#ifndef OPENSSL_NO_JPAKE
        if (jpake_secret)
                jpake_client_auth(bio_c_out, sbio, jpake_secret);
#endif

        SSL_set_bio(con,sbio,sbio);
        SSL_set_connect_state(con);

        /* ok, lets connect */
        width=SSL_get_fd(con)+1;

        read_tty=1;
        write_tty=0;
        tty_on=0;
        read_ssl=1;
        write_ssl=1;
        
        cbuf_len=0;
        cbuf_off=0;
        sbuf_len=0;
        sbuf_off=0;

        /* This is an ugly hack that does a lot of assumptions */
        /* We do have to handle multi-line responses which may come
           in a single packet or not. We therefore have to use
           BIO_gets() which does need a buffering BIO. So during
           the initial chitchat we do push a buffering BIO into the
           chain that is removed again later on to not disturb the
           rest of the s_client operation. */
        if (starttls_proto == PROTO_SMTP)
                {
                int foundit=0;
                BIO *fbio = BIO_new(BIO_f_buffer());
                BIO_push(fbio, sbio);
                /* wait for multi-line response to end from SMTP */
                do
                        {
                        mbuf_len = BIO_gets(fbio,mbuf,BUFSIZZ);
                        }
                while (mbuf_len>3 && mbuf[3]=='-');
                /* STARTTLS command requires EHLO... */
                BIO_printf(fbio,"EHLO openssl.client.net\r\n");
                (void)BIO_flush(fbio);
                /* wait for multi-line response to end EHLO SMTP response */
                do
                        {
                        mbuf_len = BIO_gets(fbio,mbuf,BUFSIZZ);
                        if (strstr(mbuf,"STARTTLS"))
                                foundit=1;
                        }
                while (mbuf_len>3 && mbuf[3]=='-');
                (void)BIO_flush(fbio);
                BIO_pop(fbio);
                BIO_free(fbio);
                if (!foundit)
                        BIO_printf(bio_err,
                                   "didn't found starttls in server response,"
                                   " try anyway...\n");
                BIO_printf(sbio,"STARTTLS\r\n");
                BIO_read(sbio,sbuf,BUFSIZZ);
                }
        else if (starttls_proto == PROTO_POP3)
                {
                BIO_read(sbio,mbuf,BUFSIZZ);
                BIO_printf(sbio,"STLS\r\n");
                BIO_read(sbio,sbuf,BUFSIZZ);
                }
        else if (starttls_proto == PROTO_IMAP)
                {
                int foundit=0;
                BIO *fbio = BIO_new(BIO_f_buffer());
                BIO_push(fbio, sbio);
                BIO_gets(fbio,mbuf,BUFSIZZ);
                /* STARTTLS command requires CAPABILITY... */
                BIO_printf(fbio,". CAPABILITY\r\n");
                (void)BIO_flush(fbio);
                /* wait for multi-line CAPABILITY response */
                do
                        {
                        mbuf_len = BIO_gets(fbio,mbuf,BUFSIZZ);
                        if (strstr(mbuf,"STARTTLS"))
                                foundit=1;
                        }
                while (mbuf_len>3 && mbuf[0]!='.');
                (void)BIO_flush(fbio);
                BIO_pop(fbio);
                BIO_free(fbio);
                if (!foundit)
                        BIO_printf(bio_err,
                                   "didn't found STARTTLS in server response,"
                                   " try anyway...\n");
                BIO_printf(sbio,". STARTTLS\r\n");
                BIO_read(sbio,sbuf,BUFSIZZ);
                }
        else if (starttls_proto == PROTO_FTP)
                {
                BIO *fbio = BIO_new(BIO_f_buffer());
                BIO_push(fbio, sbio);
                /* wait for multi-line response to end from FTP */
                do
                        {
                        mbuf_len = BIO_gets(fbio,mbuf,BUFSIZZ);
                        }
                while (mbuf_len>3 && mbuf[3]=='-');
                (void)BIO_flush(fbio);
                BIO_pop(fbio);
                BIO_free(fbio);
                BIO_printf(sbio,"AUTH TLS\r\n");
                BIO_read(sbio,sbuf,BUFSIZZ);
                }
        if (starttls_proto == PROTO_XMPP)
                {
                int seen = 0;
                BIO_printf(sbio,"<stream:stream "
                    "xmlns:stream='http://etherx.jabber.org/streams' "
                    "xmlns='jabber:client' to='%s' version='1.0'>", host);
                seen = BIO_read(sbio,mbuf,BUFSIZZ);
                mbuf[seen] = 0;
                while (!strstr(mbuf, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'"))
                        {
                        if (strstr(mbuf, "/stream:features>"))
                                goto shut;
                        seen = BIO_read(sbio,mbuf,BUFSIZZ);
                        mbuf[seen] = 0;
                        }
                BIO_printf(sbio, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
                seen = BIO_read(sbio,sbuf,BUFSIZZ);
                sbuf[seen] = 0;
                if (!strstr(sbuf, "<proceed"))
                        goto shut;
                mbuf[0] = 0;
                }

        for (;;)
                {
                FD_ZERO(&readfds);
                FD_ZERO(&writefds);

                if ((SSL_version(con) == DTLS1_VERSION) &&
                        DTLSv1_get_timeout(con, &timeout))
                        timeoutp = &timeout;
                else
                        timeoutp = NULL;

                if (SSL_in_init(con) && !SSL_total_renegotiations(con))
                        {
                        in_init=1;
                        tty_on=0;
                        }
                else
                        {
                        tty_on=1;
                        if (in_init)
                                {
                                in_init=0;
#if 0 /* This test doesn't really work as intended (needs to be fixed) */
#ifndef OPENSSL_NO_TLSEXT
                                if (servername != NULL && !SSL_session_reused(con))
                                        {
                                        BIO_printf(bio_c_out,"Server did %sacknowledge servername extension.\n",tlsextcbp.ack?"":"not ");
                                        }
#endif
#endif
                                if (sess_out)
                                        {
                                        BIO *stmp = BIO_new_file(sess_out, "w");
                                        if (stmp)
                                                {
                                                PEM_write_bio_SSL_SESSION(stmp, SSL_get_session(con));
                                                BIO_free(stmp);
                                                }
                                        else 
                                                BIO_printf(bio_err, "Error writing session file %s\n", sess_out);
                                        }
                                print_stuff(bio_c_out,con,full_log);
                                if (full_log > 0) full_log--;

                                if (starttls_proto)
                                        {
                                        BIO_printf(bio_err,"%s",mbuf);
                                        /* We don't need to know any more */
                                        starttls_proto = PROTO_OFF;
                                        }

                                if (reconnect)
                                        {
                                        reconnect--;
                                        BIO_printf(bio_c_out,"drop connection and then reconnect\n");
                                        SSL_shutdown(con);
                                        SSL_set_connect_state(con);
                                        SHUTDOWN(SSL_get_fd(con));
                                        goto re_start;
                                        }
                                }
                        }

                ssl_pending = read_ssl && SSL_pending(con);

                if (!ssl_pending)
                        {
#if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_NETWARE) && !defined (OPENSSL_SYS_BEOS_R5)
                        if (tty_on)
                                {
                                if (read_tty)  openssl_fdset(fileno(stdin),&readfds);
                                if (write_tty) openssl_fdset(fileno(stdout),&writefds);
                                }
                        if (read_ssl)
                                openssl_fdset(SSL_get_fd(con),&readfds);
                        if (write_ssl)
                                openssl_fdset(SSL_get_fd(con),&writefds);
#else
                        if(!tty_on || !write_tty) {
                                if (read_ssl)
                                        openssl_fdset(SSL_get_fd(con),&readfds);
                                if (write_ssl)
                                        openssl_fdset(SSL_get_fd(con),&writefds);
                        }
#endif
/*                      printf("mode tty(%d %d%d) ssl(%d%d)\n",
                                tty_on,read_tty,write_tty,read_ssl,write_ssl);*/

                        /* Note: under VMS with SOCKETSHR the second parameter
                         * is currently of type (int *) whereas under other
                         * systems it is (void *) if you don't have a cast it
                         * will choke the compiler: if you do have a cast then
                         * you can either go for (int *) or (void *).
                         */
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
                        /* Under Windows/DOS we make the assumption that we can
                         * always write to the tty: therefore if we need to
                         * write to the tty we just fall through. Otherwise
                         * we timeout the select every second and see if there
                         * are any keypresses. Note: this is a hack, in a proper
                         * Windows application we wouldn't do this.
                         */
                        i=0;
                        if(!write_tty) {
                                if(read_tty) {
                                        tv.tv_sec = 1;
                                        tv.tv_usec = 0;
                                        i=select(width,(void *)&readfds,(void *)&writefds,
                                                 NULL,&tv);
#if defined(OPENSSL_SYS_WINCE) || defined(OPENSSL_SYS_MSDOS)
                                        if(!i && (!_kbhit() || !read_tty) ) continue;
#else
                                        if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;
#endif
                                } else  i=select(width,(void *)&readfds,(void *)&writefds,
                                         NULL,timeoutp);
                        }
#elif defined(OPENSSL_SYS_NETWARE)
                        if(!write_tty) {
                                if(read_tty) {
                                        tv.tv_sec = 1;
                                        tv.tv_usec = 0;
                                        i=select(width,(void *)&readfds,(void *)&writefds,
                                                NULL,&tv);
                                } else  i=select(width,(void *)&readfds,(void *)&writefds,
                                        NULL,timeoutp);
                        }
#elif defined(OPENSSL_SYS_BEOS_R5)
                        /* Under BeOS-R5 the situation is similar to DOS */
                        i=0;
                        stdin_set = 0;
                        (void)fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
                        if(!write_tty) {
                                if(read_tty) {
                                        tv.tv_sec = 1;
                                        tv.tv_usec = 0;
                                        i=select(width,(void *)&readfds,(void *)&writefds,
                                                 NULL,&tv);
                                        if (read(fileno(stdin), sbuf, 0) >= 0)
                                                stdin_set = 1;
                                        if (!i && (stdin_set != 1 || !read_tty))
                                                continue;
                                } else  i=select(width,(void *)&readfds,(void *)&writefds,
                                         NULL,timeoutp);
                        }
                        (void)fcntl(fileno(stdin), F_SETFL, 0);
#else
                        i=select(width,(void *)&readfds,(void *)&writefds,
                                 NULL,timeoutp);
#endif
                        if ( i < 0)
                                {
                                BIO_printf(bio_err,"bad select %d\n",
                                get_last_socket_error());
                                goto shut;
                                /* goto end; */
                                }
                        }

                if ((SSL_version(con) == DTLS1_VERSION) && DTLSv1_handle_timeout(con) > 0)
                        {
                        BIO_printf(bio_err,"TIMEOUT occured\n");
                        }

                if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))
                        {
                        k=SSL_write(con,&(cbuf[cbuf_off]),
                                (unsigned int)cbuf_len);
                        switch (SSL_get_error(con,k))
                                {
                        case SSL_ERROR_NONE:
                                cbuf_off+=k;
                                cbuf_len-=k;
                                if (k <= 0) goto end;
                                /* we have done a  write(con,NULL,0); */
                                if (cbuf_len <= 0)
                                        {
                                        read_tty=1;
                                        write_ssl=0;
                                        }
                                else /* if (cbuf_len > 0) */
                                        {
                                        read_tty=0;
                                        write_ssl=1;
                                        }
                                break;
                        case SSL_ERROR_WANT_WRITE:
                                BIO_printf(bio_c_out,"write W BLOCK\n");
                                write_ssl=1;
                                read_tty=0;
                                break;
                        case SSL_ERROR_WANT_READ:
                                BIO_printf(bio_c_out,"write R BLOCK\n");
                                write_tty=0;
                                read_ssl=1;
                                write_ssl=0;
                                break;
                        case SSL_ERROR_WANT_X509_LOOKUP:
                                BIO_printf(bio_c_out,"write X BLOCK\n");
                                break;
                        case SSL_ERROR_ZERO_RETURN:
                                if (cbuf_len != 0)
                                        {
                                        BIO_printf(bio_c_out,"shutdown\n");
                                        ret = 0;
                                        goto shut;
                                        }
                                else
                                        {
                                        read_tty=1;
                                        write_ssl=0;
                                        break;
                                        }
                                
                        case SSL_ERROR_SYSCALL:
                                if ((k != 0) || (cbuf_len != 0))
                                        {
                                        BIO_printf(bio_err,"write:errno=%d\n",
                                                get_last_socket_error());
                                        goto shut;
                                        }
                                else
                                        {
                                        read_tty=1;
                                        write_ssl=0;
                                        }
                                break;
                        case SSL_ERROR_SSL:
                                ERR_print_errors(bio_err);
                                goto shut;
                                }
                        }
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_BEOS_R5)
                /* Assume Windows/DOS/BeOS can always write */
                else if (!ssl_pending && write_tty)
#else
                else if (!ssl_pending && FD_ISSET(fileno(stdout),&writefds))
#endif
                        {
#ifdef CHARSET_EBCDIC
                        ascii2ebcdic(&(sbuf[sbuf_off]),&(sbuf[sbuf_off]),sbuf_len);
#endif
                        i=raw_write_stdout(&(sbuf[sbuf_off]),sbuf_len);

                        if (i <= 0)
                                {
                                BIO_printf(bio_c_out,"DONE\n");
                                ret = 0;
                                goto shut;
                                /* goto end; */
                                }

                        sbuf_len-=i;;
                        sbuf_off+=i;
                        if (sbuf_len <= 0)
                                {
                                read_ssl=1;
                                write_tty=0;
                                }
                        }
                else if (ssl_pending || FD_ISSET(SSL_get_fd(con),&readfds))
                        {
#ifdef RENEG
{ static int iiii; if (++iiii == 52) { SSL_renegotiate(con); iiii=0; } }
#endif
#if 1
                        k=SSL_read(con,sbuf,1024 /* BUFSIZZ */ );
#else
/* Demo for pending and peek :-) */
                        k=SSL_read(con,sbuf,16);
{ char zbuf[10240]; 
printf("read=%d pending=%d peek=%d\n",k,SSL_pending(con),SSL_peek(con,zbuf,10240));
}
#endif

                        switch (SSL_get_error(con,k))
                                {
                        case SSL_ERROR_NONE:
                                if (k <= 0)
                                        goto end;
                                sbuf_off=0;
                                sbuf_len=k;

                                read_ssl=0;
                                write_tty=1;
                                break;
                        case SSL_ERROR_WANT_WRITE:
                                BIO_printf(bio_c_out,"read W BLOCK\n");
                                write_ssl=1;
                                read_tty=0;
                                break;
                        case SSL_ERROR_WANT_READ:
                                BIO_printf(bio_c_out,"read R BLOCK\n");
                                write_tty=0;
                                read_ssl=1;
                                if ((read_tty == 0) && (write_ssl == 0))
                                        write_ssl=1;
                                break;
                        case SSL_ERROR_WANT_X509_LOOKUP:
                                BIO_printf(bio_c_out,"read X BLOCK\n");
                                break;
                        case SSL_ERROR_SYSCALL:
                                ret=get_last_socket_error();
                                BIO_printf(bio_err,"read:errno=%d\n",ret);
                                goto shut;
                        case SSL_ERROR_ZERO_RETURN:
                                BIO_printf(bio_c_out,"closed\n");
                                ret=0;
                                goto shut;
                        case SSL_ERROR_SSL:
                                ERR_print_errors(bio_err);
                                goto shut;
                                /* break; */
                                }
                        }

#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
#if defined(OPENSSL_SYS_WINCE) || defined(OPENSSL_SYS_MSDOS)
                else if (_kbhit())
#else
                else if ((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0)))
#endif
#elif defined (OPENSSL_SYS_NETWARE)
                else if (_kbhit())
#elif defined(OPENSSL_SYS_BEOS_R5)
                else if (stdin_set)
#else
                else if (FD_ISSET(fileno(stdin),&readfds))
#endif
                        {
                        if (crlf)
                                {
                                int j, lf_num;

                                i=raw_read_stdin(cbuf,BUFSIZZ/2);
                                lf_num = 0;
                                /* both loops are skipped when i <= 0 */
                                for (j = 0; j < i; j++)
                                        if (cbuf[j] == '\n')
                                                lf_num++;
                                for (j = i-1; j >= 0; j--)
                                        {
                                        cbuf[j+lf_num] = cbuf[j];
                                        if (cbuf[j] == '\n')
                                                {
                                                lf_num--;
                                                i++;
                                                cbuf[j+lf_num] = '\r';
                                                }
                                        }
                                assert(lf_num == 0);
                                }
                        else
                                i=raw_read_stdin(cbuf,BUFSIZZ);

                        if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q')))
                                {
                                BIO_printf(bio_err,"DONE\n");
                                ret=0;
                                goto shut;
                                }

                        if ((!c_ign_eof) && (cbuf[0] == 'R'))
                                {
                                BIO_printf(bio_err,"RENEGOTIATING\n");
                                SSL_renegotiate(con);
                                cbuf_len=0;
                                }
                        else
                                {
                                cbuf_len=i;
                                cbuf_off=0;
#ifdef CHARSET_EBCDIC
                                ebcdic2ascii(cbuf, cbuf, i);
#endif
                                }

                        write_ssl=1;
                        read_tty=0;
                        }
                }

        ret=0;
shut:
        if (in_init)
                print_stuff(bio_c_out,con,full_log);
        SSL_shutdown(con);
        SHUTDOWN(SSL_get_fd(con));
end:
        if (con != NULL)
                {
                if (prexit != 0)
                        print_stuff(bio_c_out,con,1);
                SSL_free(con);
                }
        if (ctx != NULL) SSL_CTX_free(ctx);
        if (cert)
                X509_free(cert);
        if (key)
                EVP_PKEY_free(key);
        if (pass)
                OPENSSL_free(pass);
        if (cbuf != NULL) { OPENSSL_cleanse(cbuf,BUFSIZZ); OPENSSL_free(cbuf); }
        if (sbuf != NULL) { OPENSSL_cleanse(sbuf,BUFSIZZ); OPENSSL_free(sbuf); }
        if (mbuf != NULL) { OPENSSL_cleanse(mbuf,BUFSIZZ); OPENSSL_free(mbuf); }
        if (bio_c_out != NULL)
                {
                BIO_free(bio_c_out);
                bio_c_out=NULL;
                }
        apps_shutdown();
        OPENSSL_EXIT(ret);
        }


static void print_stuff(BIO *bio, SSL *s, int full)
        {
        X509 *peer=NULL;
        char *p;
        static const char *space="                ";
        char buf[BUFSIZ];
        STACK_OF(X509) *sk;
        STACK_OF(X509_NAME) *sk2;
        const SSL_CIPHER *c;
        X509_NAME *xn;
        int j,i;
#ifndef OPENSSL_NO_COMP
        const COMP_METHOD *comp, *expansion;
#endif

        if (full)
                {
                int got_a_chain = 0;

                sk=SSL_get_peer_cert_chain(s);
                if (sk != NULL)
                        {
                        got_a_chain = 1; /* we don't have it for SSL2 (yet) */

                        BIO_printf(bio,"---\nCertificate chain\n");
                        for (i=0; i<sk_X509_num(sk); i++)
                                {
                                X509_NAME_oneline(X509_get_subject_name(
                                        sk_X509_value(sk,i)),buf,sizeof buf);
                                BIO_printf(bio,"%2d s:%s\n",i,buf);
                                X509_NAME_oneline(X509_get_issuer_name(
                                        sk_X509_value(sk,i)),buf,sizeof buf);
                                BIO_printf(bio,"   i:%s\n",buf);
                                if (c_showcerts)
                                        PEM_write_bio_X509(bio,sk_X509_value(sk,i));
                                }
                        }

                BIO_printf(bio,"---\n");
                peer=SSL_get_peer_certificate(s);
                if (peer != NULL)
                        {
                        BIO_printf(bio,"Server certificate\n");
                        if (!(c_showcerts && got_a_chain)) /* Redundant if we showed the whole chain */
                                PEM_write_bio_X509(bio,peer);
                        X509_NAME_oneline(X509_get_subject_name(peer),
                                buf,sizeof buf);
                        BIO_printf(bio,"subject=%s\n",buf);
                        X509_NAME_oneline(X509_get_issuer_name(peer),
                                buf,sizeof buf);
                        BIO_printf(bio,"issuer=%s\n",buf);
                        }
                else
                        BIO_printf(bio,"no peer certificate available\n");

                sk2=SSL_get_client_CA_list(s);
                if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0))
                        {
                        BIO_printf(bio,"---\nAcceptable client certificate CA names\n");
                        for (i=0; i<sk_X509_NAME_num(sk2); i++)
                                {
                                xn=sk_X509_NAME_value(sk2,i);
                                X509_NAME_oneline(xn,buf,sizeof(buf));
                                BIO_write(bio,buf,strlen(buf));
                                BIO_write(bio,"\n",1);
                                }
                        }
                else
                        {
                        BIO_printf(bio,"---\nNo client certificate CA names sent\n");
                        }
                p=SSL_get_shared_ciphers(s,buf,sizeof buf);
                if (p != NULL)
                        {
                        /* This works only for SSL 2.  In later protocol
                         * versions, the client does not know what other
                         * ciphers (in addition to the one to be used
                         * in the current connection) the server supports. */

                        BIO_printf(bio,"---\nCiphers common between both SSL endpoints:\n");
                        j=i=0;
                        while (*p)
                                {
                                if (*p == ':')
                                        {
                                        BIO_write(bio,space,15-j%25);
                                        i++;
                                        j=0;
                                        BIO_write(bio,((i%3)?" ":"\n"),1);
                                        }
                                else
                                        {
                                        BIO_write(bio,p,1);
                                        j++;
                                        }
                                p++;
                                }
                        BIO_write(bio,"\n",1);
                        }

                BIO_printf(bio,"---\nSSL handshake has read %ld bytes and written %ld bytes\n",
                        BIO_number_read(SSL_get_rbio(s)),
                        BIO_number_written(SSL_get_wbio(s)));
                }
        BIO_printf(bio,(SSL_cache_hit(s)?"---\nReused, ":"---\nNew, "));
        c=SSL_get_current_cipher(s);
        BIO_printf(bio,"%s, Cipher is %s\n",
                SSL_CIPHER_get_version(c),
                SSL_CIPHER_get_name(c));
        if (peer != NULL) {
                EVP_PKEY *pktmp;
                pktmp = X509_get_pubkey(peer);
                BIO_printf(bio,"Server public key is %d bit\n",
                                                         EVP_PKEY_bits(pktmp));
                EVP_PKEY_free(pktmp);
        }
        BIO_printf(bio, "Secure Renegotiation IS%s supported\n",
                        SSL_get_secure_renegotiation_support(s) ? "" : " NOT");
#ifndef OPENSSL_NO_COMP
        comp=SSL_get_current_compression(s);
        expansion=SSL_get_current_expansion(s);
        BIO_printf(bio,"Compression: %s\n",
                comp ? SSL_COMP_get_name(comp) : "NONE");
        BIO_printf(bio,"Expansion: %s\n",
                expansion ? SSL_COMP_get_name(expansion) : "NONE");
#endif
        SSL_SESSION_print(bio,SSL_get_session(s));
        BIO_printf(bio,"---\n");
        if (peer != NULL)
                X509_free(peer);
        /* flush, or debugging output gets mixed with http response */
        (void)BIO_flush(bio);
        }

#ifndef OPENSSL_NO_TLSEXT

static int ocsp_resp_cb(SSL *s, void *arg)
        {
        const unsigned char *p;
        int len;
        OCSP_RESPONSE *rsp;
        len = SSL_get_tlsext_status_ocsp_resp(s, &p);
        BIO_puts(arg, "OCSP response: ");
        if (!p)
                {
                BIO_puts(arg, "no response sent\n");
                return 1;
                }
        rsp = d2i_OCSP_RESPONSE(NULL, &p, len);
        if (!rsp)
                {
                BIO_puts(arg, "response parse error\n");
                BIO_dump_indent(arg, (char *)p, len, 4);
                return 0;
                }
        BIO_puts(arg, "\n======================================\n");
        OCSP_RESPONSE_print(arg, rsp, 0);
        BIO_puts(arg, "======================================\n");
        OCSP_RESPONSE_free(rsp);
        return 1;
        }

#endif