text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  /* ====================================================================
   * 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. */
  #ifndef _BSD_SOURCE
  # define _BSD_SOURCE 1
  #endif
  #ifndef _DEFAULT_SOURCE
  # define _DEFAULT_SOURCE 1
  #endif
  
  #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>
  #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>
  #ifndef OPENSSL_NO_CT
  # include <openssl/ct.h>
  #endif
  
  #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
  
  static SSL_CTX *s_ctx = NULL;
  static SSL_CTX *s_ctx2 = NULL;
  
  /*
   * There is really no standard for this, so let's assign something
   * only for this test
   */
  #define COMP_ZLIB       1
  
  static int verify_callback(int ok, X509_STORE_CTX *ctx);
  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;
  };
  
  #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 OPENSSL_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";
  static int npn_client = 0;
  static int npn_server = 0;
  static 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 char *alpn_server;
  static char *alpn_server2;
  static const char *alpn_expected;
  static unsigned char *alpn_selected;
  static const char *server_min_proto;
  static const char *server_max_proto;
  static const char *client_min_proto;
  static const char *client_max_proto;
  static const char *should_negotiate;
  static const char *sn_client;
  static const char *sn_server1;
  static const char *sn_server2;
  static int sn_expect = 0;
  static const char *server_sess_out;
  static const char *server_sess_in;
  static const char *client_sess_out;
  static const char *client_sess_in;
  static SSL_SESSION *server_sess;
  static SSL_SESSION *client_sess;
  
  static int servername_cb(SSL *s, int *ad, void *arg)
  {
      const char *servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
      if (sn_server2 == NULL) {
          BIO_printf(bio_stdout, "Servername 2 is NULL\n");
          return SSL_TLSEXT_ERR_NOACK;
      }
  
      if (servername) {
          if (s_ctx2 != NULL && sn_server2 != NULL &&
              !strcasecmp(servername, sn_server2)) {
              BIO_printf(bio_stdout, "Switching server context.\n");
              SSL_set_SSL_CTX(s, s_ctx2);
          }
      }
      return SSL_TLSEXT_ERR_OK;
  }
  static int verify_servername(SSL *client, SSL *server)
  {
      /* just need to see if sn_context is what we expect */
      SSL_CTX* ctx = SSL_get_SSL_CTX(server);
      if (sn_expect == 0)
          return 0;
      if (sn_expect == 1 && ctx == s_ctx)
          return 0;
      if (sn_expect == 2 && ctx == s_ctx2)
          return 0;
      BIO_printf(bio_stdout, "Servername: expected context %d\n", sn_expect);
      if (ctx == s_ctx2)
          BIO_printf(bio_stdout, "Servername: context is 2\n");
      else if (ctx == s_ctx)
          BIO_printf(bio_stdout, "Servername: context is 1\n");
      else
          BIO_printf(bio_stdout, "Servername: context is unknown\n");
      return -1;
  }
  
  
  /*-
   * 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(size_t *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;
      size_t protos_len;
      char* alpn_str = arg;
  
      protos = next_protos_parse(&protos_len, alpn_str);
      if (protos == NULL) {
          fprintf(stderr, "failed to parser ALPN server protocol string: %s\n",
                  alpn_str);
          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);
  
      OPENSSL_free(alpn_selected);
      alpn_selected = NULL;
  
      if (client_proto_len != server_proto_len) {
          BIO_printf(bio_stdout, "ALPN selected protocols differ!\n");
          goto err;
      }
  
      if (client_proto != NULL &&
          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: '",
                     alpn_client);
      if (SSL_get_SSL_CTX(server) == s_ctx2) {
          BIO_printf(bio_stdout, "%s'\n",
                     alpn_server2);
      } else {
          BIO_printf(bio_stdout, "%s'\n",
                     alpn_server);
      }
      return -1;
  }
  
  /*
   * 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
  
  static const char custom_ext_cli_string[] = "abc";
  static const char custom_ext_srv_string[] = "defg";
  
  /* These set from cmdline */
  static char *serverinfo_file = NULL;
  static int serverinfo_sct = 0;
  static int serverinfo_tack = 0;
  
  /* These set based on extension callbacks */
  static int serverinfo_sct_seen = 0;
  static int serverinfo_tack_seen = 0;
  static int serverinfo_other_seen = 0;
  
  /* This set from cmdline */
  static int custom_ext = 0;
  
  /* This set based on extension callbacks */
  static 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 == TLSEXT_TYPE_signed_certificate_timestamp)
          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_localhost(SSL *s_ssl, SSL *c_ssl, int family,
                     long bytes, clock_t *s_time, clock_t *c_time);
  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 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, " -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,
              " -dhe512       - use 512 bit key for DHE (to test failure)\n");
      fprintf(stderr,
              " -dhe1024      - use 1024 bit key (safe prime) for DHE (default, no-op)\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\nTODO(openssl-team): no_ecdhe was broken by auto ecdh. Make this work again.\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
      fprintf(stderr, " -ssl3         - use SSLv3\n");
  #endif
  #ifndef OPENSSL_NO_TLS1
      fprintf(stderr, " -tls1         - use TLSv1\n");
  #endif
  #ifndef OPENSSL_NO_DTLS
      fprintf(stderr, " -dtls         - use DTLS\n");
  #ifndef OPENSSL_NO_DTLS1
      fprintf(stderr, " -dtls1        - use DTLSv1\n");
  #endif
  #ifndef OPENSSL_NO_DTLS1_2
      fprintf(stderr, " -dtls12       - use DTLSv1.2\n");
  #endif
  #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, " -ipv4         - Use IPv4 connection on localhost\n");
      fprintf(stderr, " -ipv6         - Use IPv6 connection on localhost\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");
  #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_server1 <string> - alias for -alpn_server\n");
      fprintf(stderr, " -alpn_server2 <string> - have server side context 2 offer ALPN\n");
      fprintf(stderr,
              " -alpn_expected <string> - the ALPN protocol that should be negotiated\n");
      fprintf(stderr, " -server_min_proto <string> - Minimum version the server should support\n");
      fprintf(stderr, " -server_max_proto <string> - Maximum version the server should support\n");
      fprintf(stderr, " -client_min_proto <string> - Minimum version the client should support\n");
      fprintf(stderr, " -client_max_proto <string> - Maximum version the client should support\n");
      fprintf(stderr, " -should_negotiate <string> - The version that should be negotiated, fail-client or fail-server\n");
  #ifndef OPENSSL_NO_CT
      fprintf(stderr, " -noct         - no certificate transparency\n");
      fprintf(stderr, " -requestct    - request certificate transparency\n");
      fprintf(stderr, " -requirect    - require certificate transparency\n");
  #endif
      fprintf(stderr, " -sn_client <string>  - have client request this servername\n");
      fprintf(stderr, " -sn_server1 <string> - have server context 1 respond to this servername\n");
      fprintf(stderr, " -sn_server2 <string> - have server context 2 respond to this servername\n");
      fprintf(stderr, " -sn_expect1          - expected server 1\n");
      fprintf(stderr, " -sn_expect2          - expected server 2\n");
      fprintf(stderr, " -server_sess_out <file>    - Save the server session to a file\n");
      fprintf(stderr, " -server_sess_in <file>     - Read the server session from a file\n");
      fprintf(stderr, " -client_sess_out <file>    - Save the client session to a file\n");
      fprintf(stderr, " -client_sess_in <file>     - Read the client session from a file\n");
      fprintf(stderr, " -should_reuse <number>     - The expected state of reusing the session\n");
      fprintf(stderr, " -no_ticket    - do not issue TLS session ticket\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) {
          EVP_PKEY* pubkey = X509_get0_pubkey(cert);
  
          if (pubkey != NULL) {
              BIO_puts(bio_stdout, ", ");
              print_key_details(bio_stdout, pubkey);
          }
          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");
  }
  
  /*
   * protocol_from_string - converts a protocol version string to a number
   *
   * Returns -1 on failure or the version on success
   */
  static int protocol_from_string(const char *value)
  {
      struct protocol_versions {
          const char *name;
          int version;
      };
      static const struct protocol_versions versions[] = {
          {"ssl3", SSL3_VERSION},
          {"tls1", TLS1_VERSION},
          {"tls1.1", TLS1_1_VERSION},
          {"tls1.2", TLS1_2_VERSION},
          {"tls1.3", TLS1_3_VERSION},
          {"dtls1", DTLS1_VERSION},
          {"dtls1.2", DTLS1_2_VERSION}};
      size_t i;
      size_t n = OSSL_NELEM(versions);
  
      for (i = 0; i < n; i++)
          if (strcmp(versions[i].name, value) == 0)
              return versions[i].version;
      return -1;
  }
  
  static SSL_SESSION *read_session(const char *filename)
  {
      SSL_SESSION *sess;
      BIO *f = BIO_new_file(filename, "r");
  
      if (f == NULL) {
          BIO_printf(bio_err, "Can't open session file %s\n", filename);
          ERR_print_errors(bio_err);
          return NULL;
      }
      sess = PEM_read_bio_SSL_SESSION(f, NULL, 0, NULL);
      if (sess == NULL) {
          BIO_printf(bio_err, "Can't parse session file %s\n", filename);
          ERR_print_errors(bio_err);
      }
      BIO_free(f);
      return sess;
  }
  
  static int write_session(const char *filename, SSL_SESSION *sess)
  {
      BIO *f = BIO_new_file(filename, "w");
  
      if (sess == NULL) {
          BIO_printf(bio_err, "No session information\n");
          return 0;
      }
      if (f == NULL) {
          BIO_printf(bio_err, "Can't open session file %s\n", filename);
          ERR_print_errors(bio_err);
          return 0;
      }
      PEM_write_bio_SSL_SESSION(f, sess);
      BIO_free(f);
      return 1;
  }
  
  /*
   * set_protocol_version - Sets protocol version minimum or maximum
   *
   * Returns 0 on failure and 1 on success
   */
  static int set_protocol_version(const char *version, SSL *ssl, int setting)
  {
      if (version != NULL) {
          int ver = protocol_from_string(version);
          if (ver < 0) {
              BIO_printf(bio_err, "Error parsing: %s\n", version);
              return 0;
          }
          return SSL_ctrl(ssl, setting, ver, NULL);
      }
      return 1;
  }
  
  int main(int argc, char *argv[])
  {
      const char *CApath = NULL, *CAfile = NULL;
      int badop = 0;
      enum { BIO_MEM, BIO_PAIR, BIO_IPV4, BIO_IPV6 } bio_type = BIO_MEM;
      int force = 0;
      int dtls1 = 0, dtls12 = 0, dtls = 0, tls1 = 0, tls1_2 = 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 };
      char *p;
      SSL_CTX *c_ctx = NULL;
      const SSL_METHOD *meth = NULL;
      SSL *c_ssl, *s_ssl;
      int number = 1, reuse = 0;
      int should_reuse = -1;
      int no_ticket = 0;
      long bytes = 256L;
  #ifndef OPENSSL_NO_DH
      DH *dh;
      int dhe512 = 0, dhe1024dsa = 0;
  #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_psk = 0;
      int print_time = 0;
      clock_t s_time = 0, c_time = 0;
  #ifndef OPENSSL_NO_COMP
      int n, comp = 0;
      COMP_METHOD *cm = NULL;
      STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
  #endif
  #ifdef OPENSSL_FIPS
      int fips_mode = 0;
  #endif
      int no_protocol;
      int min_version = 0, max_version = 0;
  #ifndef OPENSSL_NO_CT
      /*
       * Disable CT validation by default, because it will interfere with
       * anything using custom extension handlers to deal with SCT extensions.
       */
      int ct_validation = 0;
  #endif
      SSL_CONF_CTX *s_cctx = NULL, *c_cctx = NULL, *s_cctx2 = NULL;
      STACK_OF(OPENSSL_STRING) *conf_args = NULL;
      char *arg = NULL, *argn = NULL;
  
      verbose = 0;
      debug = 0;
      cipher = 0;
  
      bio_err = BIO_new_fp(stderr, BIO_NOCLOSE | BIO_FP_TEXT);
  
      p = getenv("OPENSSL_DEBUG_MEMORY");
      if (p != NULL && strcmp(p, "on") == 0)
          CRYPTO_set_mem_debug(1);
      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();
      s_cctx2 = SSL_CONF_CTX_new();
      c_cctx = SSL_CONF_CTX_new();
  
      if (!s_cctx || !c_cctx || !s_cctx2) {
          ERR_print_errors(bio_err);
          goto end;
      }
  
      SSL_CONF_CTX_set_flags(s_cctx,
                             SSL_CONF_FLAG_CMDLINE | SSL_CONF_FLAG_SERVER |
                             SSL_CONF_FLAG_CERTIFICATE |
                             SSL_CONF_FLAG_REQUIRE_PRIVATE);
      SSL_CONF_CTX_set_flags(s_cctx2,
                             SSL_CONF_FLAG_CMDLINE | SSL_CONF_FLAG_SERVER |
                             SSL_CONF_FLAG_CERTIFICATE |
                             SSL_CONF_FLAG_REQUIRE_PRIVATE);
      if (!SSL_CONF_CTX_set1_prefix(s_cctx, "-s_")) {
          ERR_print_errors(bio_err);
          goto end;
      }
      if (!SSL_CONF_CTX_set1_prefix(s_cctx2, "-s_")) {
          ERR_print_errors(bio_err);
          goto end;
      }
  
      SSL_CONF_CTX_set_flags(c_cctx,
                             SSL_CONF_FLAG_CMDLINE | SSL_CONF_FLAG_CLIENT |
                             SSL_CONF_FLAG_CERTIFICATE |
                             SSL_CONF_FLAG_REQUIRE_PRIVATE);
      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") == 0) {
  #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, "-v") == 0)
              verbose = 1;
          else if (strcmp(*argv, "-d") == 0)
              debug = 1;
          else if (strcmp(*argv, "-reuse") == 0)
              reuse = 1;
          else if (strcmp(*argv, "-dhe512") == 0) {
  #ifndef OPENSSL_NO_DH
              dhe512 = 1;
  #else
              fprintf(stderr,
                      "ignoring -dhe512, since I'm compiled without DH\n");
  #endif
          } else if (strcmp(*argv, "-dhe1024dsa") == 0) {
  #ifndef OPENSSL_NO_DH
              dhe1024dsa = 1;
  #else
              fprintf(stderr,
                      "ignoring -dhe1024dsa, 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)
              /* obsolete */;
          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);
              min_version = TLS1_VERSION;
          } else if (strcmp(*argv, "-srppass") == 0) {
              if (--argc < 1)
                  goto bad;
              srp_server_arg.pass = srp_client_arg.srppassin = *(++argv);
              min_version = TLS1_VERSION;
          }
  #endif
          else if (strcmp(*argv, "-tls1_2") == 0) {
              tls1_2 = 1;
          } else if (strcmp(*argv, "-tls1") == 0) {
              tls1 = 1;
          } else if (strcmp(*argv, "-ssl3") == 0) {
              ssl3 = 1;
          } else if (strcmp(*argv, "-dtls1") == 0) {
              dtls1 = 1;
          } else if (strcmp(*argv, "-dtls12") == 0) {
              dtls12 = 1;
          } else if (strcmp(*argv, "-dtls") == 0) {
              dtls = 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, "-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_type = BIO_PAIR;
          }
  #ifndef OPENSSL_NO_SOCK
          else if (strcmp(*argv, "-ipv4") == 0) {
              bio_type = BIO_IPV4;
          } else if (strcmp(*argv, "-ipv6") == 0) {
              bio_type = BIO_IPV6;
          }
  #endif
          else if (strcmp(*argv, "-f") == 0) {
              force = 1;
          } else if (strcmp(*argv, "-time") == 0) {
              print_time = 1;
          }
  #ifndef OPENSSL_NO_CT
          else if (strcmp(*argv, "-noct") == 0) {
              ct_validation = 0;
          }
          else if (strcmp(*argv, "-ct") == 0) {
              ct_validation = 1;
          }
  #endif
  #ifndef OPENSSL_NO_COMP
          else if (strcmp(*argv, "-zlib") == 0) {
              comp = COMP_ZLIB;
          }
  #endif
          else if (strcmp(*argv, "-app_verify") == 0) {
              app_verify_arg.app_verify = 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 ||
                     strcmp(*argv, "-alpn_server1") == 0) {
              if (--argc < 1)
                  goto bad;
              alpn_server = *(++argv);
          } else if (strcmp(*argv, "-alpn_server2") == 0) {
              if (--argc < 1)
                  goto bad;
              alpn_server2 = *(++argv);
          } else if (strcmp(*argv, "-alpn_expected") == 0) {
              if (--argc < 1)
                  goto bad;
              alpn_expected = *(++argv);
          } else if (strcmp(*argv, "-server_min_proto") == 0) {
              if (--argc < 1)
                  goto bad;
              server_min_proto = *(++argv);
          } else if (strcmp(*argv, "-server_max_proto") == 0) {
              if (--argc < 1)
                  goto bad;
              server_max_proto = *(++argv);
          } else if (strcmp(*argv, "-client_min_proto") == 0) {
              if (--argc < 1)
                  goto bad;
              client_min_proto = *(++argv);
          } else if (strcmp(*argv, "-client_max_proto") == 0) {
              if (--argc < 1)
                  goto bad;
              client_max_proto = *(++argv);
          } else if (strcmp(*argv, "-should_negotiate") == 0) {
              if (--argc < 1)
                  goto bad;
              should_negotiate = *(++argv);
          } else if (strcmp(*argv, "-sn_client") == 0) {
              if (--argc < 1)
                  goto bad;
              sn_client = *(++argv);
          } else if (strcmp(*argv, "-sn_server1") == 0) {
              if (--argc < 1)
                  goto bad;
              sn_server1 = *(++argv);
          } else if (strcmp(*argv, "-sn_server2") == 0) {
              if (--argc < 1)
                  goto bad;
              sn_server2 = *(++argv);
          } else if (strcmp(*argv, "-sn_expect1") == 0) {
              sn_expect = 1;
          } else if (strcmp(*argv, "-sn_expect2") == 0) {
              sn_expect = 2;
          } else if (strcmp(*argv, "-server_sess_out") == 0) {
              if (--argc < 1)
                  goto bad;
              server_sess_out = *(++argv);
          } else if (strcmp(*argv, "-server_sess_in") == 0) {
              if (--argc < 1)
                  goto bad;
              server_sess_in = *(++argv);
          } else if (strcmp(*argv, "-client_sess_out") == 0) {
              if (--argc < 1)
                  goto bad;
              client_sess_out = *(++argv);
          } else if (strcmp(*argv, "-client_sess_in") == 0) {
              if (--argc < 1)
                  goto bad;
              client_sess_in = *(++argv);
          } else if (strcmp(*argv, "-should_reuse") == 0) {
              if (--argc < 1)
                  goto bad;
              should_reuse = !!atoi(*(++argv));
          } else if (strcmp(*argv, "-no_ticket") == 0) {
              no_ticket = 1;
          } 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;
      }
  
      if (ssl3 + tls1 + tls1_2 + dtls + dtls1 + dtls12 > 1) {
          fprintf(stderr, "At most one of -ssl3, -tls1, -tls1_2, -dtls, -dtls1 or -dtls12 should "
                  "be requested.\n");
          EXIT(1);
      }
  
  #ifdef OPENSSL_NO_SSL3
      if (ssl3)
          no_protocol = 1;
      else
  #endif
  #ifdef OPENSSL_NO_TLS1
      if (tls1)
          no_protocol = 1;
      else
  #endif
  #ifdef OPENSSL_NO_TLS1_2
      if (tls1_2)
          no_protocol = 1;
      else
  #endif
  #if defined(OPENSSL_NO_DTLS) || defined(OPENSSL_NO_DTLS1)
      if (dtls1)
          no_protocol = 1;
      else
  #endif
  #if defined(OPENSSL_NO_DTLS) || defined(OPENSSL_NO_DTLS1_2)
      if (dtls12)
          no_protocol = 1;
      else
  #endif
          no_protocol = 0;
  
      /*
       * 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 && !tls1_2 && !dtls && !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, -tls1_2, -dtls, -dtls1, -dtls12, -reuse\n"
                  "to avoid protocol mismatch.\n");
          EXIT(1);
      }
  #ifdef OPENSSL_FIPS
      if (fips_mode) {
          if (!FIPS_mode_set(1)) {
              ERR_print_errors(bio_err);
              EXIT(1);
          } else
              fprintf(stderr, "*** IN FIPS MODE ***\n");
      }
  #endif
  
      if (print_time) {
          if (bio_type != BIO_PAIR) {
              fprintf(stderr, "Using BIO pair (-bio_pair)\n");
              bio_type = BIO_PAIR;
          }
          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"); */
  
  #ifndef OPENSSL_NO_COMP
      if (comp == COMP_ZLIB)
          cm = COMP_zlib();
      if (cm != NULL) {
          if (COMP_get_type(cm) != 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_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
  
  #ifndef OPENSSL_NO_TLS
      meth = TLS_method();
      if (ssl3) {
          min_version = SSL3_VERSION;
          max_version = SSL3_VERSION;
      } else if (tls1) {
          min_version = TLS1_VERSION;
          max_version = TLS1_VERSION;
      } else if (tls1_2) {
          min_version = TLS1_2_VERSION;
          max_version = TLS1_2_VERSION;
      }
  #endif
  #ifndef OPENSSL_NO_DTLS
      if (dtls || dtls1 || dtls12)
          meth = DTLS_method();
      if (dtls1) {
          min_version = DTLS1_VERSION;
          max_version = DTLS1_VERSION;
      } else if (dtls12) {
          min_version = DTLS1_2_VERSION;
          max_version = DTLS1_2_VERSION;
      }
  #endif
  
      c_ctx = SSL_CTX_new(meth);
      s_ctx = SSL_CTX_new(meth);
      s_ctx2 = SSL_CTX_new(meth); /* no SSL_CTX_dup! */
      if ((c_ctx == NULL) || (s_ctx == NULL) || (s_ctx2 == NULL)) {
          ERR_print_errors(bio_err);
          goto end;
      }
      /*
       * Since we will use low security ciphersuites and keys for testing set
       * security level to zero by default. Tests can override this by adding
       * "@SECLEVEL=n" to the cipher string.
       */
      SSL_CTX_set_security_level(c_ctx, 0);
      SSL_CTX_set_security_level(s_ctx, 0);
      SSL_CTX_set_security_level(s_ctx2, 0);
  
      if (no_ticket) {
          SSL_CTX_set_options(c_ctx, SSL_OP_NO_TICKET);
          SSL_CTX_set_options(s_ctx, SSL_OP_NO_TICKET);
      }
  
      if (SSL_CTX_set_min_proto_version(c_ctx, min_version) == 0)
          goto end;
      if (SSL_CTX_set_max_proto_version(c_ctx, max_version) == 0)
          goto end;
      if (SSL_CTX_set_min_proto_version(s_ctx, min_version) == 0)
          goto end;
      if (SSL_CTX_set_max_proto_version(s_ctx, max_version) == 0)
          goto end;
  
      if (cipher != NULL) {
          if (!SSL_CTX_set_cipher_list(c_ctx, cipher)
              || !SSL_CTX_set_cipher_list(s_ctx, cipher)
              || !SSL_CTX_set_cipher_list(s_ctx2, cipher)) {
              ERR_print_errors(bio_err);
              goto end;
          }
      }
  
  #ifndef OPENSSL_NO_CT
      if (ct_validation &&
          !SSL_CTX_enable_ct(c_ctx, SSL_CT_VALIDATION_STRICT)) {
          ERR_print_errors(bio_err);
          goto end;
      }
  #endif
  
      /* Process SSL_CONF arguments */
      SSL_CONF_CTX_set_ssl_ctx(c_cctx, c_ctx);
      SSL_CONF_CTX_set_ssl_ctx(s_cctx, s_ctx);
      SSL_CONF_CTX_set_ssl_ctx(s_cctx2, s_ctx2);
  
      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_cctx2, arg, argn);
              if (rv > 0)
                  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) || !SSL_CONF_CTX_finish(s_cctx2)) {
          BIO_puts(bio_err, "Error finishing context\n");
          ERR_print_errors(bio_err);
          goto end;
      }
  #ifndef OPENSSL_NO_DH
      if (!no_dhe) {
          if (dhe1024dsa) {
              dh = get_dh1024dsa();
          } else if (dhe512)
              dh = get_dh512();
          else
              dh = get_dh1024();
          SSL_CTX_set_tmp_dh(s_ctx, dh);
          SSL_CTX_set_tmp_dh(s_ctx2, dh);
          DH_free(dh);
      }
  #else
      (void)no_dhe;
  #endif
  
      if ((!SSL_CTX_load_verify_locations(s_ctx, CAfile, CApath)) ||
          (!SSL_CTX_set_default_verify_paths(s_ctx)) ||
          (!SSL_CTX_load_verify_locations(s_ctx2, CAfile, CApath)) ||
          (!SSL_CTX_set_default_verify_paths(s_ctx2)) ||
          (!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; */
      }
  
  #ifndef OPENSSL_NO_CT
      if (!SSL_CTX_set_default_ctlog_list_file(s_ctx) ||
          !SSL_CTX_set_default_ctlog_list_file(s_ctx2) ||
          !SSL_CTX_set_default_ctlog_list_file(c_ctx)) {
          ERR_print_errors(bio_err);
      }
  #endif
  
      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_verify(s_ctx2,
                             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);
          SSL_CTX_set_cert_verify_callback(s_ctx2, 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) ||
              !SSL_CTX_set_session_id_context(s_ctx2, (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);
          SSL_CTX_set_psk_server_callback(s_ctx2, 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") ||
              !SSL_CTX_use_psk_identity_hint(s_ctx2, "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_verify(s_ctx2, SSL_VERIFY_NONE, verify_callback);
          SSL_CTX_set_srp_cb_arg(s_ctx, &srp_server_arg);
          SSL_CTX_set_srp_cb_arg(s_ctx2, &srp_server_arg);
          SSL_CTX_set_srp_username_callback(s_ctx, ssl_srp_server_param_cb);
          SSL_CTX_set_srp_username_callback(s_ctx2, 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);
          SSL_CTX_set_next_protos_advertised_cb(s_ctx2, cb_server_npn, NULL);
      }
      if (npn_server_reject) {
          SSL_CTX_set_next_protos_advertised_cb(s_ctx, cb_server_rejects_npn,
                                                NULL);
          SSL_CTX_set_next_protos_advertised_cb(s_ctx2, cb_server_rejects_npn,
                                                NULL);
      }
  #endif
  
      if (serverinfo_sct) {
          if (!SSL_CTX_add_client_custom_ext(c_ctx,
                  TLSEXT_TYPE_signed_certificate_timestamp,
                  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) ||
              !SSL_CTX_use_serverinfo_file(s_ctx2, 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_ctx2, 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_ctx2, 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_ctx2, 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)
              || !SSL_CTX_add_server_custom_ext(s_ctx2, 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, alpn_server);
      if (alpn_server2)
          SSL_CTX_set_alpn_select_cb(s_ctx2, cb_server_alpn, alpn_server2);
  
      if (alpn_client) {
          size_t 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);
      }
  
      if (server_sess_in != NULL) {
          server_sess = read_session(server_sess_in);
          if (server_sess == NULL)
              goto end;
      }
      if (client_sess_in != NULL) {
          client_sess = read_session(client_sess_in);
          if (client_sess == NULL)
              goto end;
      }
  
      if (server_sess_out != NULL || server_sess_in != NULL) {
          char *keys;
          long size;
  
          /* Use a fixed key so that we can decrypt the ticket. */
          size = SSL_CTX_set_tlsext_ticket_keys(s_ctx, NULL, 0);
          keys = OPENSSL_zalloc(size);
          SSL_CTX_set_tlsext_ticket_keys(s_ctx, keys, size);
          OPENSSL_free(keys);
      }
  
      if (sn_server1 != NULL || sn_server2 != NULL)
          SSL_CTX_set_tlsext_servername_callback(s_ctx, servername_cb);
  
      c_ssl = SSL_new(c_ctx);
      s_ssl = SSL_new(s_ctx);
  
      if (sn_client)
          SSL_set_tlsext_host_name(c_ssl, sn_client);
  
      if (!set_protocol_version(server_min_proto, s_ssl, SSL_CTRL_SET_MIN_PROTO_VERSION))
          goto end;
      if (!set_protocol_version(server_max_proto, s_ssl, SSL_CTRL_SET_MAX_PROTO_VERSION))
          goto end;
      if (!set_protocol_version(client_min_proto, c_ssl, SSL_CTRL_SET_MIN_PROTO_VERSION))
          goto end;
      if (!set_protocol_version(client_max_proto, c_ssl, SSL_CTRL_SET_MAX_PROTO_VERSION))
          goto end;
  
      if (server_sess) {
          if (SSL_CTX_add_session(s_ctx, server_sess) == 0) {
              BIO_printf(bio_err, "Can't add server session\n");
              ERR_print_errors(bio_err);
              goto end;
          }
      }
  
      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 (client_sess_in != NULL) {
              if (SSL_set_session(c_ssl, client_sess) == 0) {
                  BIO_printf(bio_err, "Can't set client session\n");
                  ERR_print_errors(bio_err);
                  goto end;
              }
          }
          switch (bio_type) {
          case BIO_MEM:
              ret = doit(s_ssl, c_ssl, bytes);
              break;
          case BIO_PAIR:
              ret = doit_biopair(s_ssl, c_ssl, bytes, &s_time, &c_time);
              break;
  #ifndef OPENSSL_NO_SOCK
          case BIO_IPV4:
              ret = doit_localhost(s_ssl, c_ssl, BIO_FAMILY_IPV4,
                                   bytes, &s_time, &c_time);
              break;
          case BIO_IPV6:
              ret = doit_localhost(s_ssl, c_ssl, BIO_FAMILY_IPV6,
                                   bytes, &s_time, &c_time);
              break;
  #else
          case BIO_IPV4:
          case BIO_IPV6:
              ret = 1;
              goto err;
  #endif
          }
          if (ret)  break;
      }
  
      if (should_negotiate && ret == 0 &&
          strcmp(should_negotiate, "fail-server") != 0 &&
          strcmp(should_negotiate, "fail-client") != 0) {
          int version = protocol_from_string(should_negotiate);
          if (version < 0) {
              BIO_printf(bio_err, "Error parsing: %s\n", should_negotiate);
              ret = 1;
              goto err;
          }
          if (SSL_version(c_ssl) != version) {
              BIO_printf(bio_err, "Unxpected version negotiated. "
                  "Expected: %s, got %s\n", should_negotiate, SSL_get_version(c_ssl));
              ret = 1;
              goto err;
          }
      }
  
      if (should_reuse != -1) {
          if (SSL_session_reused(s_ssl) != should_reuse ||
              SSL_session_reused(c_ssl) != should_reuse) {
              BIO_printf(bio_err, "Unexpected session reuse state. "
                  "Expected: %d, server: %d, client: %d\n", should_reuse,
                  SSL_session_reused(s_ssl), SSL_session_reused(c_ssl));
              ret = 1;
              goto err;
          }
      }
  
      if (server_sess_out != NULL) {
          if (write_session(server_sess_out, SSL_get_session(s_ssl)) == 0) {
              ret = 1;
              goto err;
          }
      }
      if (client_sess_out != NULL) {
          if (write_session(client_sess_out, SSL_get_session(c_ssl)) == 0) {
              ret = 1;
              goto err;
          }
      }
  
      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
      }
  
   err:
      SSL_free(s_ssl);
      SSL_free(c_ssl);
  
   end:
      SSL_CTX_free(s_ctx);
      SSL_CTX_free(s_ctx2);
      SSL_CTX_free(c_ctx);
      SSL_CONF_CTX_free(s_cctx);
      SSL_CONF_CTX_free(s_cctx2);
      SSL_CONF_CTX_free(c_cctx);
      sk_OPENSSL_STRING_free(conf_args);
  
      BIO_free(bio_stdout);
  
      SSL_SESSION_free(server_sess);
      SSL_SESSION_free(client_sess);
  
  #ifndef OPENSSL_NO_CRYPTO_MDEBUG
      if (CRYPTO_mem_leaks(bio_err) <= 0)
          ret = 1;
  #endif
      BIO_free(bio_err);
      EXIT(ret);
  }
  
  #ifndef OPENSSL_NO_SOCK
  int doit_localhost(SSL *s_ssl, SSL *c_ssl, int family, 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 *acpt = NULL, *server = NULL, *client = NULL;
      char addr_str[40];
      int ret = 1;
      int err_in_client = 0;
      int err_in_server = 0;
  
      acpt = BIO_new_accept("0");
      if (acpt == NULL)
          goto err;
      BIO_set_accept_ip_family(acpt, family);
      BIO_set_bind_mode(acpt, BIO_SOCK_NONBLOCK | BIO_SOCK_REUSEADDR);
      if (BIO_do_accept(acpt) <= 0)
          goto err;
  
      BIO_snprintf(addr_str, sizeof(addr_str), ":%s", BIO_get_accept_port(acpt));
  
      client = BIO_new_connect(addr_str);
      BIO_set_conn_ip_family(client, family);
      if (!client)
          goto err;
  
      if (BIO_set_nbio(client, 1) <= 0)
          goto err;
      if (BIO_set_nbio(acpt, 1) <= 0)
          goto err;
  
      {
          int st_connect = 0, st_accept = 0;
  
          while(!st_connect || !st_accept) {
              if (!st_connect) {
                  if (BIO_do_connect(client) <= 0) {
                      if (!BIO_should_retry(client))
                          goto err;
                  } else {
                      st_connect = 1;
                  }
              }
              if (!st_accept) {
                  if (BIO_do_accept(acpt) <= 0) {
                      if (!BIO_should_retry(acpt))
                          goto err;
                  } else {
                      st_accept = 1;
                  }
              }
          }
      }
      /* We're not interested in accepting further connects */
      server = BIO_pop(acpt);
      BIO_free_all(acpt);
      acpt = NULL;
  
      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:             I/O for SSL library
           *
           *
           * server:             I/O for SSL library
           *
           * s_ssl_bio:          SSL filter BIO
           */
  
          /*
           * 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");
                          err_in_client = 1;
                          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");
                          err_in_client = 1;
                          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");
                          err_in_server = 1;
                          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");
                          err_in_server = 1;
                          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);
          }
      }
      while (cw_num > 0 || cr_num > 0 || sw_num > 0 || sr_num > 0);
  
      if (verbose)
          print_details(c_ssl, "DONE via TCP connect: ");
  # 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 (verify_servername(c_ssl, s_ssl) < 0) {
          ret = 1;
          goto err;
      }
  
      if (custom_ext_error) {
          fprintf(stderr, "Custom extension error\n");
          ret = 1;
          goto err;
      }
  
  # ifndef OPENSSL_NO_NEXTPROTONEG
   end:
  # endif
      ret = 0;
  
   err:
      ERR_print_errors(bio_err);
  
      BIO_free_all(acpt);
      BIO_free(server);
      BIO_free(client);
      BIO_free(s_ssl_bio);
      BIO_free(c_ssl_bio);
  
      if (should_negotiate != NULL && strcmp(should_negotiate, "fail-client") == 0)
          ret = (err_in_client != 0) ? 0 : 1;
      else if (should_negotiate != NULL && strcmp(should_negotiate, "fail-server") == 0)
          ret = (err_in_server != 0) ? 0 : 1;
  
      return ret;
  }
  #endif
  
  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;
      int err_in_client = 0;
      int err_in_server = 0;
  
      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");
                          err_in_client = 1;
                          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");
                          err_in_client = 1;
                          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");
                          err_in_server = 1;
                          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");
                          err_in_server = 1;
                          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 (verify_servername(c_ssl, s_ssl) < 0) {
          ret = 1;
          goto err;
      }
  
      if (custom_ext_error) {
          fprintf(stderr, "Custom extension error\n");
          ret = 1;
          goto err;
      }
  
  #ifndef OPENSSL_NO_NEXTPROTONEG
   end:
  #endif
      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);
  
      if (should_negotiate != NULL && strcmp(should_negotiate, "fail-client") == 0)
          ret = (err_in_client != 0) ? 0 : 1;
      else if (should_negotiate != NULL && strcmp(should_negotiate, "fail-server") == 0)
          ret = (err_in_server != 0) ? 0 : 1;
  
      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;
      int err_in_client = 0;
      int err_in_server = 0;
  
      bufsiz = count > 40 * 1024 ? 40 * 1024 : count;
  
      if ((cbuf = OPENSSL_zalloc(bufsiz)) == NULL)
          goto err;
      if ((sbuf = OPENSSL_zalloc(bufsiz)) == NULL)
          goto err;
  
      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_in_client = 1;
                          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_in_client = 1;
                          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_in_server = 1;
                          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_in_server = 1;
                          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);
      OPENSSL_free(cbuf);
      OPENSSL_free(sbuf);
  
      if (should_negotiate != NULL && strcmp(should_negotiate, "fail-client") == 0)
          ret = (err_in_client != 0) ? 0 : 1;
      else if (should_negotiate != NULL && strcmp(should_negotiate, "fail-server") == 0)
          ret = (err_in_server != 0) ? 0 : 1;
  
      return (ret);
  }
  
  static int verify_callback(int ok, X509_STORE_CTX *ctx)
  {
      char *s, buf[256];
  
      s = X509_NAME_oneline(X509_get_subject_name(X509_STORE_CTX_get_current_cert(ctx)),
                            buf, sizeof buf);
      if (s != NULL) {
          if (ok)
              printf("depth=%d %s\n", X509_STORE_CTX_get_error_depth(ctx), buf);
          else {
              fprintf(stderr, "depth=%d error=%d %s\n",
                      X509_STORE_CTX_get_error_depth(ctx),
                      X509_STORE_CTX_get_error(ctx), buf);
          }
      }
  
      if (ok == 0) {
          int i = X509_STORE_CTX_get_error(ctx);
  
          switch (i) {
          default:
              fprintf(stderr, "Error string: %s\n",
                      X509_verify_cert_error_string(i));
              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;
              break;
          }
      }
  
      return (ok);
  }
  
  static int app_verify_callback(X509_STORE_CTX *ctx, void *arg)
  {
      int ok = 1;
      struct app_verify_arg *cb_arg = arg;
  
      if (cb_arg->app_verify) {
          char *s = NULL, buf[256];
          X509 *c = X509_STORE_CTX_get0_cert(ctx);
  
          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 *)c);
          if (c)
              s = X509_NAME_oneline(X509_get_subject_name(c), buf, 256);
          if (s != NULL) {
              printf("cert depth=%d %s\n",
                      X509_STORE_CTX_get_error_depth(ctx), buf);
          }
          return (1);
      }
  
      ok = X509_verify_cert(ctx);
  
      return (ok);
  }
  
  #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;
      BIGNUM *p, *g;
  
      if ((dh = DH_new()) == NULL)
          return (NULL);
      p = BN_bin2bn(dh512_p, sizeof(dh512_p), NULL);
      g = BN_bin2bn(dh512_g, sizeof(dh512_g), NULL);
      if ((p == NULL) || (g == NULL) || !DH_set0_pqg(dh, p, NULL, g)) {
          DH_free(dh);
          BN_free(p);
          BN_free(g);
          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;
      BIGNUM *p, *g;
  
      if ((dh = DH_new()) == NULL)
          return (NULL);
      p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
      g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
      if ((p == NULL) || (g == NULL) || !DH_set0_pqg(dh, p, NULL, g)) {
          DH_free(dh);
          BN_free(p);
          BN_free(g);
          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;
      BIGNUM *p, *g;
  
      if ((dh = DH_new()) == NULL)
          return (NULL);
      p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
      g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
      if ((p == NULL) || (g == NULL) || !DH_set0_pqg(dh, p, NULL, g)) {
          DH_free(dh);
          BN_free(p);
          BN_free(g);
          return (NULL);
      }
      DH_set_length(dh, 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
  