apps/s_server.c

   1 /* apps/s_server.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
 118  * deprecated functions for openssl-internal code */
 119 #ifdef OPENSSL_NO_DEPRECATED
 120 #undef OPENSSL_NO_DEPRECATED
 121 #endif
 122
 123 #include <assert.h>
 124 #include <stdio.h>
 125 #include <stdlib.h>
 126 #include <string.h>
 127 #include <sys/types.h>
 128 #include <sys/stat.h>
 129 #include <openssl/e_os2.h>
 130 #ifdef OPENSSL_NO_STDIO
 131 #define APPS_WIN16
 132 #endif
 133
 134 /* With IPv6, it looks like Digital has mixed up the proper order of
 135    recursive header file inclusion, resulting in the compiler complaining
 136    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
 137    is needed to have fileno() declared correctly...  So let's define u_int */
 138 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
 139 #define __U_INT
 140 typedef unsigned int u_int;
 141 #endif
 142
 143 #include <openssl/lhash.h>
 144 #include <openssl/bn.h>
 145 #define USE_SOCKETS
 146 #include "apps.h"
 147 #include <openssl/err.h>
 148 #include <openssl/pem.h>
 149 #include <openssl/x509.h>
 150 #include <openssl/ssl.h>
 151 #include <openssl/rand.h>
 152 #include "s_apps.h"
 153
 154 #ifdef OPENSSL_SYS_WINCE
 155 /* Windows CE incorrectly defines fileno as returning void*, so to avoid problems below... */
 156 #ifdef fileno
 157 #undef fileno
 158 #endif
 159 #define fileno(a) (int)_fileno(a)
 160 #endif
 161
 162 #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
 163 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
 164 #undef FIONBIO
 165 #endif
 166
 167 #ifndef OPENSSL_NO_RSA
 168 static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength);
 169 #endif
 170 static int sv_body(char *hostname, int s, unsigned char *context);
 171 static int www_body(char *hostname, int s, unsigned char *context);
 172 static void close_accept_socket(void );
 173 static void sv_usage(void);
 174 static int init_ssl_connection(SSL *s);
 175 static void print_stats(BIO *bp,SSL_CTX *ctx);
 176 static int generate_session_id(const SSL *ssl, unsigned char *id,
 177                                 unsigned int *id_len);
 178 #ifndef OPENSSL_NO_DH
 179 static DH *load_dh_param(char *dhfile);
 180 static DH *get_dh512(void);
 181 #endif
 182
 183 #ifdef MONOLITH
 184 static void s_server_init(void);
 185 #endif
 186
 187 #ifndef S_ISDIR
 188 # if defined(_S_IFMT) && defined(_S_IFDIR)
 189 #  define S_ISDIR(a)    (((a) & _S_IFMT) == _S_IFDIR)
 190 # else
 191 #  define S_ISDIR(a)    (((a) & S_IFMT) == S_IFDIR)
 192 # endif
 193 #endif
 194
 195 #ifndef OPENSSL_NO_DH
 196 static unsigned char dh512_p[]={
 197         0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75,
 198         0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F,
 199         0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3,
 200         0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12,
 201         0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C,
 202         0x47,0x74,0xE8,0x33,
 203         };
 204 static unsigned char dh512_g[]={
 205         0x02,
 206         };
 207
 208 static DH *get_dh512(void)
 209         {
 210         DH *dh=NULL;
 211
 212         if ((dh=DH_new()) == NULL) return(NULL);
 213         dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
 214         dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL);
 215         if ((dh->p == NULL) || (dh->g == NULL))
 216                 return(NULL);
 217         return(dh);
 218         }
 219 #endif
 220
 221
 222 /* static int load_CA(SSL_CTX *ctx, char *file);*/
 223
 224 #undef BUFSIZZ
 225 #define BUFSIZZ 16*1024
 226 static int bufsize=BUFSIZZ;
 227 static int accept_socket= -1;
 228
 229 #define TEST_CERT       "server.pem"
 230 #undef PROG
 231 #define PROG            s_server_main
 232
 233 extern int verify_depth;
 234
 235 static char *cipher=NULL;
 236 static int s_server_verify=SSL_VERIFY_NONE;
 237 static int s_server_session_id_context = 1; /* anything will do */
 238 static char *s_cert_file=TEST_CERT,*s_key_file=NULL;
 239 static char *s_dcert_file=NULL,*s_dkey_file=NULL;
 240 #ifdef FIONBIO
 241 static int s_nbio=0;
 242 #endif
 243 static int s_nbio_test=0;
 244 int s_crlf=0;
 245 static SSL_CTX *ctx=NULL;
 246 static int www=0;
 247
 248 static BIO *bio_s_out=NULL;
 249 static int s_debug=0;
 250 static int s_msg=0;
 251 static int s_quiet=0;
 252
 253 static int hack=0;
 254 #ifndef OPENSSL_NO_ENGINE
 255 static char *engine_id=NULL;
 256 #endif
 257 static const char *session_id_prefix=NULL;
 258
 259 #ifdef MONOLITH
 260 static void s_server_init(void)
 261         {
 262         accept_socket=-1;
 263         cipher=NULL;
 264         s_server_verify=SSL_VERIFY_NONE;
 265         s_dcert_file=NULL;
 266         s_dkey_file=NULL;
 267         s_cert_file=TEST_CERT;
 268         s_key_file=NULL;
 269 #ifdef FIONBIO
 270         s_nbio=0;
 271 #endif
 272         s_nbio_test=0;
 273         ctx=NULL;
 274         www=0;
 275
 276         bio_s_out=NULL;
 277         s_debug=0;
 278         s_msg=0;
 279         s_quiet=0;
 280         hack=0;
 281 #ifndef OPENSSL_NO_ENGINE
 282         engine_id=NULL;
 283 #endif
 284         }
 285 #endif
 286
 287 static void sv_usage(void)
 288         {
 289         BIO_printf(bio_err,"usage: s_server [args ...]\n");
 290         BIO_printf(bio_err,"\n");
 291         BIO_printf(bio_err," -accept arg   - port to accept on (default is %d)\n",PORT);
 292         BIO_printf(bio_err," -context arg  - set session ID context\n");
 293         BIO_printf(bio_err," -verify arg   - turn on peer certificate verification\n");
 294         BIO_printf(bio_err," -Verify arg   - turn on peer certificate verification, must have a cert.\n");
 295         BIO_printf(bio_err," -cert arg     - certificate file to use, PEM format assumed\n");
 296         BIO_printf(bio_err,"                 (default is %s)\n",TEST_CERT);
 297         BIO_printf(bio_err," -key arg      - Private Key file to use, PEM format assumed, in cert file if\n");
 298         BIO_printf(bio_err,"                 not specified (default is %s)\n",TEST_CERT);
 299         BIO_printf(bio_err," -dcert arg    - second certificate file to use (usually for DSA)\n");
 300         BIO_printf(bio_err," -dkey arg     - second private key file to use (usually for DSA)\n");
 301         BIO_printf(bio_err," -dhparam arg  - DH parameter file to use, in cert file if not specified\n");
 302         BIO_printf(bio_err,"                 or a default set of parameters is used\n");
 303 #ifndef OPENSSL_NO_ECDH
 304         BIO_printf(bio_err," -named_curve arg  - Elliptic curve name to use for ephemeral ECDH keys.\n" \
 305                            "                 Use \"openssl ecparam -list_curves\" for all names\n" \
 306                            "                 (default is sect163r2).\n");
 307 #endif
 308 #ifdef FIONBIO
 309         BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");
 310 #endif
 311         BIO_printf(bio_err," -nbio_test    - test with the non-blocking test bio\n");
 312         BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");
 313         BIO_printf(bio_err," -debug        - Print more output\n");
 314         BIO_printf(bio_err," -msg          - Show protocol messages\n");
 315         BIO_printf(bio_err," -state        - Print the SSL states\n");
 316         BIO_printf(bio_err," -CApath arg   - PEM format directory of CA's\n");
 317         BIO_printf(bio_err," -CAfile arg   - PEM format file of CA's\n");
 318         BIO_printf(bio_err," -nocert       - Don't use any certificates (Anon-DH)\n");
 319         BIO_printf(bio_err," -cipher arg   - play with 'openssl ciphers' to see what goes here\n");
 320         BIO_printf(bio_err," -serverpref   - Use server's cipher preferences\n");
 321         BIO_printf(bio_err," -quiet        - No server output\n");
 322         BIO_printf(bio_err," -no_tmp_rsa   - Do not generate a tmp RSA key\n");
 323         BIO_printf(bio_err," -ssl2         - Just talk SSLv2\n");
 324         BIO_printf(bio_err," -ssl3         - Just talk SSLv3\n");
 325         BIO_printf(bio_err," -tls1         - Just talk TLSv1\n");
 326         BIO_printf(bio_err," -no_ssl2      - Just disable SSLv2\n");
 327         BIO_printf(bio_err," -no_ssl3      - Just disable SSLv3\n");
 328         BIO_printf(bio_err," -no_tls1      - Just disable TLSv1\n");
 329 #ifndef OPENSSL_NO_DH
 330         BIO_printf(bio_err," -no_dhe       - Disable ephemeral DH\n");
 331 #endif
 332 #ifndef OPENSSL_NO_ECDH
 333         BIO_printf(bio_err," -no_ecdhe     - Disable ephemeral ECDH\n");
 334 #endif
 335         BIO_printf(bio_err," -bugs         - Turn on SSL bug compatibility\n");
 336         BIO_printf(bio_err," -www          - Respond to a 'GET /' with a status page\n");
 337         BIO_printf(bio_err," -WWW          - Respond to a 'GET /<path> HTTP/1.0' with file ./<path>\n");
 338         BIO_printf(bio_err," -HTTP         - Respond to a 'GET /<path> HTTP/1.0' with file ./<path>\n");
 339         BIO_printf(bio_err,"                 with the assumption it contains a complete HTTP response.\n");
 340 #ifndef OPENSSL_NO_ENGINE
 341         BIO_printf(bio_err," -engine id    - Initialise and use the specified engine\n");
 342 #endif
 343         BIO_printf(bio_err," -id_prefix arg - Generate SSL/TLS session IDs prefixed by 'arg'\n");
 344         BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 345         }
 346
 347 static int local_argc=0;
 348 static char **local_argv;
 349
 350 #ifdef CHARSET_EBCDIC
 351 static int ebcdic_new(BIO *bi);
 352 static int ebcdic_free(BIO *a);
 353 static int ebcdic_read(BIO *b, char *out, int outl);
 354 static int ebcdic_write(BIO *b, const char *in, int inl);
 355 static long ebcdic_ctrl(BIO *b, int cmd, long num, void *ptr);
 356 static int ebcdic_gets(BIO *bp, char *buf, int size);
 357 static int ebcdic_puts(BIO *bp, const char *str);
 358
 359 #define BIO_TYPE_EBCDIC_FILTER  (18|0x0200)
 360 static BIO_METHOD methods_ebcdic=
 361         {
 362         BIO_TYPE_EBCDIC_FILTER,
 363         "EBCDIC/ASCII filter",
 364         ebcdic_write,
 365         ebcdic_read,
 366         ebcdic_puts,
 367         ebcdic_gets,
 368         ebcdic_ctrl,
 369         ebcdic_new,
 370         ebcdic_free,
 371         };
 372
 373 typedef struct
 374 {
 375         size_t  alloced;
 376         char    buff[1];
 377 } EBCDIC_OUTBUFF;
 378
 379 BIO_METHOD *BIO_f_ebcdic_filter()
 380 {
 381         return(&methods_ebcdic);
 382 }
 383
 384 static int ebcdic_new(BIO *bi)
 385 {
 386         EBCDIC_OUTBUFF *wbuf;
 387
 388         wbuf = (EBCDIC_OUTBUFF *)OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + 1024);
 389         wbuf->alloced = 1024;
 390         wbuf->buff[0] = '\0';
 391
 392         bi->ptr=(char *)wbuf;
 393         bi->init=1;
 394         bi->flags=0;
 395         return(1);
 396 }
 397
 398 static int ebcdic_free(BIO *a)
 399 {
 400         if (a == NULL) return(0);
 401         if (a->ptr != NULL)
 402                 OPENSSL_free(a->ptr);
 403         a->ptr=NULL;
 404         a->init=0;
 405         a->flags=0;
 406         return(1);
 407 }
 408
 409 static int ebcdic_read(BIO *b, char *out, int outl)
 410 {
 411         int ret=0;
 412
 413         if (out == NULL || outl == 0) return(0);
 414         if (b->next_bio == NULL) return(0);
 415
 416         ret=BIO_read(b->next_bio,out,outl);
 417         if (ret > 0)
 418                 ascii2ebcdic(out,out,ret);
 419         return(ret);
 420 }
 421
 422 static int ebcdic_write(BIO *b, const char *in, int inl)
 423 {
 424         EBCDIC_OUTBUFF *wbuf;
 425         int ret=0;
 426         int num;
 427         unsigned char n;
 428
 429         if ((in == NULL) || (inl <= 0)) return(0);
 430         if (b->next_bio == NULL) return(0);
 431
 432         wbuf=(EBCDIC_OUTBUFF *)b->ptr;
 433
 434         if (inl > (num = wbuf->alloced))
 435         {
 436                 num = num + num;  /* double the size */
 437                 if (num < inl)
 438                         num = inl;
 439                 OPENSSL_free(wbuf);
 440                 wbuf=(EBCDIC_OUTBUFF *)OPENSSL_malloc(sizeof(EBCDIC_OUTBUFF) + num);
 441
 442                 wbuf->alloced = num;
 443                 wbuf->buff[0] = '\0';
 444
 445                 b->ptr=(char *)wbuf;
 446         }
 447
 448         ebcdic2ascii(wbuf->buff, in, inl);
 449
 450         ret=BIO_write(b->next_bio, wbuf->buff, inl);
 451
 452         return(ret);
 453 }
 454
 455 static long ebcdic_ctrl(BIO *b, int cmd, long num, void *ptr)
 456 {
 457         long ret;
 458
 459         if (b->next_bio == NULL) return(0);
 460         switch (cmd)
 461         {
 462         case BIO_CTRL_DUP:
 463                 ret=0L;
 464                 break;
 465         default:
 466                 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
 467                 break;
 468         }
 469         return(ret);
 470 }
 471
 472 static int ebcdic_gets(BIO *bp, char *buf, int size)
 473 {
 474         int i, ret=0;
 475         if (bp->next_bio == NULL) return(0);
 476 /*      return(BIO_gets(bp->next_bio,buf,size));*/
 477         for (i=0; i<size-1; ++i)
 478         {
 479                 ret = ebcdic_read(bp,&buf[i],1);
 480                 if (ret <= 0)
 481                         break;
 482                 else if (buf[i] == '\n')
 483                 {
 484                         ++i;
 485                         break;
 486                 }
 487         }
 488         if (i < size)
 489                 buf[i] = '\0';
 490         return (ret < 0 && i == 0) ? ret : i;
 491 }
 492
 493 static int ebcdic_puts(BIO *bp, const char *str)
 494 {
 495         if (bp->next_bio == NULL) return(0);
 496         return ebcdic_write(bp, str, strlen(str));
 497 }
 498 #endif
 499
 500 int MAIN(int, char **);
 501
 502 int MAIN(int argc, char *argv[])
 503         {
 504         X509_STORE *store = NULL;
 505         int vflags = 0;
 506         short port=PORT;
 507         char *CApath=NULL,*CAfile=NULL;
 508         char *context = NULL;
 509         char *dhfile = NULL;
 510         char *named_curve = NULL;
 511         int badop=0,bugs=0;
 512         int ret=1;
 513         int off=0;
 514         int no_tmp_rsa=0,no_dhe=0,no_ecdhe=0,nocert=0;
 515         int state=0;
 516         SSL_METHOD *meth=NULL;
 517 #ifndef OPENSSL_NO_ENGINE
 518         ENGINE *e=NULL;
 519 #endif
 520         char *inrand=NULL;
 521
 522 #if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
 523         meth=SSLv23_server_method();
 524 #elif !defined(OPENSSL_NO_SSL3)
 525         meth=SSLv3_server_method();
 526 #elif !defined(OPENSSL_NO_SSL2)
 527         meth=SSLv2_server_method();
 528 #endif
 529
 530         local_argc=argc;
 531         local_argv=argv;
 532
 533         apps_startup();
 534 #ifdef MONOLITH
 535         s_server_init();
 536 #endif
 537
 538         if (bio_err == NULL)
 539                 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 540
 541         if (!load_config(bio_err, NULL))
 542                 goto end;
 543
 544         verify_depth=0;
 545 #ifdef FIONBIO
 546         s_nbio=0;
 547 #endif
 548         s_nbio_test=0;
 549
 550         argc--;
 551         argv++;
 552
 553         while (argc >= 1)
 554                 {
 555                 if      ((strcmp(*argv,"-port") == 0) ||
 556                          (strcmp(*argv,"-accept") == 0))
 557                         {
 558                         if (--argc < 1) goto bad;
 559                         if (!extract_port(*(++argv),&port))
 560                                 goto bad;
 561                         }
 562                 else if (strcmp(*argv,"-verify") == 0)
 563                         {
 564                         s_server_verify=SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE;
 565                         if (--argc < 1) goto bad;
 566                         verify_depth=atoi(*(++argv));
 567                         BIO_printf(bio_err,"verify depth is %d\n",verify_depth);
 568                         }
 569                 else if (strcmp(*argv,"-Verify") == 0)
 570                         {
 571                         s_server_verify=SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT|
 572                                 SSL_VERIFY_CLIENT_ONCE;
 573                         if (--argc < 1) goto bad;
 574                         verify_depth=atoi(*(++argv));
 575                         BIO_printf(bio_err,"verify depth is %d, must return a certificate\n",verify_depth);
 576                         }
 577                 else if (strcmp(*argv,"-context") == 0)
 578                         {
 579                         if (--argc < 1) goto bad;
 580                         context= *(++argv);
 581                         }
 582                 else if (strcmp(*argv,"-cert") == 0)
 583                         {
 584                         if (--argc < 1) goto bad;
 585                         s_cert_file= *(++argv);
 586                         }
 587                 else if (strcmp(*argv,"-key") == 0)
 588                         {
 589                         if (--argc < 1) goto bad;
 590                         s_key_file= *(++argv);
 591                         }
 592                 else if (strcmp(*argv,"-dhparam") == 0)
 593                         {
 594                         if (--argc < 1) goto bad;
 595                         dhfile = *(++argv);
 596                         }
 597 #ifndef OPENSSL_NO_ECDH
 598                 else if (strcmp(*argv,"-named_curve") == 0)
 599                         {
 600                         if (--argc < 1) goto bad;
 601                         named_curve = *(++argv);
 602                         }
 603 #endif
 604                 else if (strcmp(*argv,"-dcert") == 0)
 605                         {
 606                         if (--argc < 1) goto bad;
 607                         s_dcert_file= *(++argv);
 608                         }
 609                 else if (strcmp(*argv,"-dkey") == 0)
 610                         {
 611                         if (--argc < 1) goto bad;
 612                         s_dkey_file= *(++argv);
 613                         }
 614                 else if (strcmp(*argv,"-nocert") == 0)
 615                         {
 616                         nocert=1;
 617                         }
 618                 else if (strcmp(*argv,"-CApath") == 0)
 619                         {
 620                         if (--argc < 1) goto bad;
 621                         CApath= *(++argv);
 622                         }
 623                 else if (strcmp(*argv,"-crl_check") == 0)
 624                         {
 625                         vflags |= X509_V_FLAG_CRL_CHECK;
 626                         }
 627                 else if (strcmp(*argv,"-crl_check") == 0)
 628                         {
 629                         vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
 630                         }
 631                 else if (strcmp(*argv,"-serverpref") == 0)
 632                         { off|=SSL_OP_CIPHER_SERVER_PREFERENCE; }
 633                 else if (strcmp(*argv,"-cipher") == 0)
 634                         {
 635                         if (--argc < 1) goto bad;
 636                         cipher= *(++argv);
 637                         }
 638                 else if (strcmp(*argv,"-CAfile") == 0)
 639                         {
 640                         if (--argc < 1) goto bad;
 641                         CAfile= *(++argv);
 642                         }
 643 #ifdef FIONBIO
 644                 else if (strcmp(*argv,"-nbio") == 0)
 645                         { s_nbio=1; }
 646 #endif
 647                 else if (strcmp(*argv,"-nbio_test") == 0)
 648                         {
 649 #ifdef FIONBIO
 650                         s_nbio=1;
 651 #endif
 652                         s_nbio_test=1;
 653                         }
 654                 else if (strcmp(*argv,"-debug") == 0)
 655                         { s_debug=1; }
 656                 else if (strcmp(*argv,"-msg") == 0)
 657                         { s_msg=1; }
 658                 else if (strcmp(*argv,"-hack") == 0)
 659                         { hack=1; }
 660                 else if (strcmp(*argv,"-state") == 0)
 661                         { state=1; }
 662                 else if (strcmp(*argv,"-crlf") == 0)
 663                         { s_crlf=1; }
 664                 else if (strcmp(*argv,"-quiet") == 0)
 665                         { s_quiet=1; }
 666                 else if (strcmp(*argv,"-bugs") == 0)
 667                         { bugs=1; }
 668                 else if (strcmp(*argv,"-no_tmp_rsa") == 0)
 669                         { no_tmp_rsa=1; }
 670                 else if (strcmp(*argv,"-no_dhe") == 0)
 671                         { no_dhe=1; }
 672                 else if (strcmp(*argv,"-no_ecdhe") == 0)
 673                         { no_ecdhe=1; }
 674                 else if (strcmp(*argv,"-www") == 0)
 675                         { www=1; }
 676                 else if (strcmp(*argv,"-WWW") == 0)
 677                         { www=2; }
 678                 else if (strcmp(*argv,"-HTTP") == 0)
 679                         { www=3; }
 680                 else if (strcmp(*argv,"-no_ssl2") == 0)
 681                         { off|=SSL_OP_NO_SSLv2; }
 682                 else if (strcmp(*argv,"-no_ssl3") == 0)
 683                         { off|=SSL_OP_NO_SSLv3; }
 684                 else if (strcmp(*argv,"-no_tls1") == 0)
 685                         { off|=SSL_OP_NO_TLSv1; }
 686 #ifndef OPENSSL_NO_SSL2
 687                 else if (strcmp(*argv,"-ssl2") == 0)
 688                         { meth=SSLv2_server_method(); }
 689 #endif
 690 #ifndef OPENSSL_NO_SSL3
 691                 else if (strcmp(*argv,"-ssl3") == 0)
 692                         { meth=SSLv3_server_method(); }
 693 #endif
 694 #ifndef OPENSSL_NO_TLS1
 695                 else if (strcmp(*argv,"-tls1") == 0)
 696                         { meth=TLSv1_server_method(); }
 697 #endif
 698                 else if (strcmp(*argv, "-id_prefix") == 0)
 699                         {
 700                         if (--argc < 1) goto bad;
 701                         session_id_prefix = *(++argv);
 702                         }
 703 #ifndef OPENSSL_NO_ENGINE
 704                 else if (strcmp(*argv,"-engine") == 0)
 705                         {
 706                         if (--argc < 1) goto bad;
 707                         engine_id= *(++argv);
 708                         }
 709 #endif
 710                 else if (strcmp(*argv,"-rand") == 0)
 711                         {
 712                         if (--argc < 1) goto bad;
 713                         inrand= *(++argv);
 714                         }
 715                 else
 716                         {
 717                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 718                         badop=1;
 719                         break;
 720                         }
 721                 argc--;
 722                 argv++;
 723                 }
 724         if (badop)
 725                 {
 726 bad:
 727                 sv_usage();
 728                 goto end;
 729                 }
 730
 731         SSL_load_error_strings();
 732         OpenSSL_add_ssl_algorithms();
 733
 734 #ifndef OPENSSL_NO_ENGINE
 735         e = setup_engine(bio_err, engine_id, 1);
 736 #endif
 737
 738         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
 739                 && !RAND_status())
 740                 {
 741                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 742                 }
 743         if (inrand != NULL)
 744                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 745                         app_RAND_load_files(inrand));
 746
 747         if (bio_s_out == NULL)
 748                 {
 749                 if (s_quiet && !s_debug && !s_msg)
 750                         {
 751                         bio_s_out=BIO_new(BIO_s_null());
 752                         }
 753                 else
 754                         {
 755                         if (bio_s_out == NULL)
 756                                 bio_s_out=BIO_new_fp(stdout,BIO_NOCLOSE);
 757                         }
 758                 }
 759
 760 #if !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
 761         if (nocert)
 762 #endif
 763                 {
 764                 s_cert_file=NULL;
 765                 s_key_file=NULL;
 766                 s_dcert_file=NULL;
 767                 s_dkey_file=NULL;
 768                 }
 769
 770         ctx=SSL_CTX_new(meth);
 771         if (ctx == NULL)
 772                 {
 773                 ERR_print_errors(bio_err);
 774                 goto end;
 775                 }
 776         if (session_id_prefix)
 777                 {
 778                 if(strlen(session_id_prefix) >= 32)
 779                         BIO_printf(bio_err,
 780 "warning: id_prefix is too long, only one new session will be possible\n");
 781                 else if(strlen(session_id_prefix) >= 16)
 782                         BIO_printf(bio_err,
 783 "warning: id_prefix is too long if you use SSLv2\n");
 784                 if(!SSL_CTX_set_generate_session_id(ctx, generate_session_id))
 785                         {
 786                         BIO_printf(bio_err,"error setting 'id_prefix'\n");
 787                         ERR_print_errors(bio_err);
 788                         goto end;
 789                         }
 790                 BIO_printf(bio_err,"id_prefix '%s' set.\n", session_id_prefix);
 791                 }
 792         SSL_CTX_set_quiet_shutdown(ctx,1);
 793         if (bugs) SSL_CTX_set_options(ctx,SSL_OP_ALL);
 794         if (hack) SSL_CTX_set_options(ctx,SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG);
 795         SSL_CTX_set_options(ctx,off);
 796
 797         if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
 798
 799         SSL_CTX_sess_set_cache_size(ctx,128);
 800
 801 #if 0
 802         if (cipher == NULL) cipher=getenv("SSL_CIPHER");
 803 #endif
 804
 805 #if 0
 806         if (s_cert_file == NULL)
 807                 {
 808                 BIO_printf(bio_err,"You must specify a certificate file for the server to use\n");
 809                 goto end;
 810                 }
 811 #endif
 812
 813         if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||
 814                 (!SSL_CTX_set_default_verify_paths(ctx)))
 815                 {
 816                 /* BIO_printf(bio_err,"X509_load_verify_locations\n"); */
 817                 ERR_print_errors(bio_err);
 818                 /* goto end; */
 819                 }
 820         store = SSL_CTX_get_cert_store(ctx);
 821         X509_STORE_set_flags(store, vflags);
 822
 823 #ifndef OPENSSL_NO_DH
 824         if (!no_dhe)
 825                 {
 826                 DH *dh=NULL;
 827
 828                 if (dhfile)
 829                         dh = load_dh_param(dhfile);
 830                 else if (s_cert_file)
 831                         dh = load_dh_param(s_cert_file);
 832
 833                 if (dh != NULL)
 834                         {
 835                         BIO_printf(bio_s_out,"Setting temp DH parameters\n");
 836                         }
 837                 else
 838                         {
 839                         BIO_printf(bio_s_out,"Using default temp DH parameters\n");
 840                         dh=get_dh512();
 841                         }
 842                 (void)BIO_flush(bio_s_out);
 843
 844                 SSL_CTX_set_tmp_dh(ctx,dh);
 845                 DH_free(dh);
 846                 }
 847 #endif
 848
 849 #ifndef OPENSSL_NO_ECDH
 850         if (!no_ecdhe)
 851                 {
 852                 EC_KEY *ecdh=NULL;
 853
 854                 ecdh = EC_KEY_new();
 855                 if (ecdh == NULL)
 856                         {
 857                         BIO_printf(bio_err,"Could not create ECDH struct.\n");
 858                         goto end;
 859                         }
 860
 861                 if (named_curve)
 862                         {
 863                         int nid = OBJ_sn2nid(named_curve);
 864
 865                         if (nid == 0)
 866                                 {
 867                                 BIO_printf(bio_err, "unknown curve name (%s)\n",
 868                                         named_curve);
 869                                 goto end;
 870                                 }
 871
 872                         ecdh->group = EC_GROUP_new_by_nid(nid);
 873                         if (ecdh->group == NULL)
 874                                 {
 875                                 BIO_printf(bio_err, "unable to create curve (%s)\n",
 876                                         named_curve);
 877                                 goto end;
 878                                 }
 879                         }
 880
 881                 if (ecdh->group != NULL)
 882                         {
 883                         BIO_printf(bio_s_out,"Setting temp ECDH parameters\n");
 884                         }
 885                 else
 886                         {
 887                         BIO_printf(bio_s_out,"Using default temp ECDH parameters\n");
 888                         ecdh->group=EC_GROUP_new_by_nid(NID_sect163r2);
 889                         if (ecdh->group == NULL)
 890                                 {
 891                                 BIO_printf(bio_err, "unable to create curve (sect163r2)\n");
 892                                 goto end;
 893                                 }
 894                         }
 895                 (void)BIO_flush(bio_s_out);
 896
 897                 SSL_CTX_set_tmp_ecdh(ctx,ecdh);
 898                 EC_KEY_free(ecdh);
 899                 }
 900 #endif
 901
 902         if (!set_cert_stuff(ctx,s_cert_file,s_key_file))
 903                 goto end;
 904         if (s_dcert_file != NULL)
 905                 {
 906                 if (!set_cert_stuff(ctx,s_dcert_file,s_dkey_file))
 907                         goto end;
 908                 }
 909
 910 #ifndef OPENSSL_NO_RSA
 911 #if 1
 912         if (!no_tmp_rsa)
 913                 SSL_CTX_set_tmp_rsa_callback(ctx,tmp_rsa_cb);
 914 #else
 915         if (!no_tmp_rsa && SSL_CTX_need_tmp_RSA(ctx))
 916                 {
 917                 RSA *rsa;
 918
 919                 BIO_printf(bio_s_out,"Generating temp (512 bit) RSA key...");
 920                 BIO_flush(bio_s_out);
 921
 922                 rsa=RSA_generate_key(512,RSA_F4,NULL);
 923
 924                 if (!SSL_CTX_set_tmp_rsa(ctx,rsa))
 925                         {
 926                         ERR_print_errors(bio_err);
 927                         goto end;
 928                         }
 929                 RSA_free(rsa);
 930                 BIO_printf(bio_s_out,"\n");
 931                 }
 932 #endif
 933 #endif
 934
 935         if (cipher != NULL)
 936                 if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
 937                 BIO_printf(bio_err,"error setting cipher list\n");
 938                 ERR_print_errors(bio_err);
 939                 goto end;
 940         }
 941         SSL_CTX_set_verify(ctx,s_server_verify,verify_callback);
 942         SSL_CTX_set_session_id_context(ctx,(void*)&s_server_session_id_context,
 943                 sizeof s_server_session_id_context);
 944
 945         if (CAfile != NULL)
 946             SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));
 947
 948         BIO_printf(bio_s_out,"ACCEPT\n");
 949         if (www)
 950                 do_server(port,&accept_socket,www_body, context);
 951         else
 952                 do_server(port,&accept_socket,sv_body, context);
 953         print_stats(bio_s_out,ctx);
 954         ret=0;
 955 end:
 956         if (ctx != NULL) SSL_CTX_free(ctx);
 957         if (bio_s_out != NULL)
 958                 {
 959                 BIO_free(bio_s_out);
 960                 bio_s_out=NULL;
 961                 }
 962         apps_shutdown();
 963         OPENSSL_EXIT(ret);
 964         }
 965
 966 static void print_stats(BIO *bio, SSL_CTX *ssl_ctx)
 967         {
 968         BIO_printf(bio,"%4ld items in the session cache\n",
 969                 SSL_CTX_sess_number(ssl_ctx));
 970         BIO_printf(bio,"%4ld client connects (SSL_connect())\n",
 971                 SSL_CTX_sess_connect(ssl_ctx));
 972         BIO_printf(bio,"%4ld client renegotiates (SSL_connect())\n",
 973                 SSL_CTX_sess_connect_renegotiate(ssl_ctx));
 974         BIO_printf(bio,"%4ld client connects that finished\n",
 975                 SSL_CTX_sess_connect_good(ssl_ctx));
 976         BIO_printf(bio,"%4ld server accepts (SSL_accept())\n",
 977                 SSL_CTX_sess_accept(ssl_ctx));
 978         BIO_printf(bio,"%4ld server renegotiates (SSL_accept())\n",
 979                 SSL_CTX_sess_accept_renegotiate(ssl_ctx));
 980         BIO_printf(bio,"%4ld server accepts that finished\n",
 981                 SSL_CTX_sess_accept_good(ssl_ctx));
 982         BIO_printf(bio,"%4ld session cache hits\n",SSL_CTX_sess_hits(ssl_ctx));
 983         BIO_printf(bio,"%4ld session cache misses\n",SSL_CTX_sess_misses(ssl_ctx));
 984         BIO_printf(bio,"%4ld session cache timeouts\n",SSL_CTX_sess_timeouts(ssl_ctx));
 985         BIO_printf(bio,"%4ld callback cache hits\n",SSL_CTX_sess_cb_hits(ssl_ctx));
 986         BIO_printf(bio,"%4ld cache full overflows (%ld allowed)\n",
 987                 SSL_CTX_sess_cache_full(ssl_ctx),
 988                 SSL_CTX_sess_get_cache_size(ssl_ctx));
 989         }
 990
 991 static int sv_body(char *hostname, int s, unsigned char *context)
 992         {
 993         char *buf=NULL;
 994         fd_set readfds;
 995         int ret=1,width;
 996         int k,i;
 997         unsigned long l;
 998         SSL *con=NULL;
 999         BIO *sbio;
1000 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
1001         struct timeval tv;
1002 #endif
1003
1004         if ((buf=OPENSSL_malloc(bufsize)) == NULL)
1005                 {
1006                 BIO_printf(bio_err,"out of memory\n");
1007                 goto err;
1008                 }
1009 #ifdef FIONBIO
1010         if (s_nbio)
1011                 {
1012                 unsigned long sl=1;
1013
1014                 if (!s_quiet)
1015                         BIO_printf(bio_err,"turning on non blocking io\n");
1016                 if (BIO_socket_ioctl(s,FIONBIO,&sl) < 0)
1017                         ERR_print_errors(bio_err);
1018                 }
1019 #endif
1020
1021         if (con == NULL) {
1022                 con=SSL_new(ctx);
1023 #ifndef OPENSSL_NO_KRB5
1024                 if ((con->kssl_ctx = kssl_ctx_new()) != NULL)
1025                         {
1026                         kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVICE,
1027                                                                 KRB5SVC);
1028                         kssl_ctx_setstring(con->kssl_ctx, KSSL_KEYTAB,
1029                                                                 KRB5KEYTAB);
1030                         }
1031 #endif  /* OPENSSL_NO_KRB5 */
1032                 if(context)
1033                       SSL_set_session_id_context(con, context,
1034                                                  strlen((char *)context));
1035         }
1036         SSL_clear(con);
1037
1038         sbio=BIO_new_socket(s,BIO_NOCLOSE);
1039         if (s_nbio_test)
1040                 {
1041                 BIO *test;
1042
1043                 test=BIO_new(BIO_f_nbio_test());
1044                 sbio=BIO_push(test,sbio);
1045                 }
1046         SSL_set_bio(con,sbio,sbio);
1047         SSL_set_accept_state(con);
1048         /* SSL_set_fd(con,s); */
1049
1050         if (s_debug)
1051                 {
1052                 con->debug=1;
1053                 BIO_set_callback(SSL_get_rbio(con),bio_dump_cb);
1054                 BIO_set_callback_arg(SSL_get_rbio(con),bio_s_out);
1055                 }
1056         if (s_msg)
1057                 {
1058                 SSL_set_msg_callback(con, msg_cb);
1059                 SSL_set_msg_callback_arg(con, bio_s_out);
1060                 }
1061
1062         width=s+1;
1063         for (;;)
1064                 {
1065                 int read_from_terminal;
1066                 int read_from_sslcon;
1067
1068                 read_from_terminal = 0;
1069                 read_from_sslcon = SSL_pending(con);
1070
1071                 if (!read_from_sslcon)
1072                         {
1073                         FD_ZERO(&readfds);
1074 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS)
1075                         FD_SET(fileno(stdin),&readfds);
1076 #endif
1077                         FD_SET(s,&readfds);
1078                         /* Note: under VMS with SOCKETSHR the second parameter is
1079                          * currently of type (int *) whereas under other systems
1080                          * it is (void *) if you don't have a cast it will choke
1081                          * the compiler: if you do have a cast then you can either
1082                          * go for (int *) or (void *).
1083                          */
1084 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
1085                         /* Under DOS (non-djgpp) and Windows we can't select on stdin: only
1086                          * on sockets. As a workaround we timeout the select every
1087                          * second and check for any keypress. In a proper Windows
1088                          * application we wouldn't do this because it is inefficient.
1089                          */
1090                         tv.tv_sec = 1;
1091                         tv.tv_usec = 0;
1092                         i=select(width,(void *)&readfds,NULL,NULL,&tv);
1093                         if((i < 0) || (!i && !_kbhit() ) )continue;
1094                         if(_kbhit())
1095                                 read_from_terminal = 1;
1096 #else
1097                         i=select(width,(void *)&readfds,NULL,NULL,NULL);
1098                         if (i <= 0) continue;
1099                         if (FD_ISSET(fileno(stdin),&readfds))
1100                                 read_from_terminal = 1;
1101 #endif
1102                         if (FD_ISSET(s,&readfds))
1103                                 read_from_sslcon = 1;
1104                         }
1105                 if (read_from_terminal)
1106                         {
1107                         if (s_crlf)
1108                                 {
1109                                 int j, lf_num;
1110
1111                                 i=read(fileno(stdin), buf, bufsize/2);
1112                                 lf_num = 0;
1113                                 /* both loops are skipped when i <= 0 */
1114                                 for (j = 0; j < i; j++)
1115                                         if (buf[j] == '\n')
1116                                                 lf_num++;
1117                                 for (j = i-1; j >= 0; j--)
1118                                         {
1119                                         buf[j+lf_num] = buf[j];
1120                                         if (buf[j] == '\n')
1121                                                 {
1122                                                 lf_num--;
1123                                                 i++;
1124                                                 buf[j+lf_num] = '\r';
1125                                                 }
1126                                         }
1127                                 assert(lf_num == 0);
1128                                 }
1129                         else
1130                                 i=read(fileno(stdin),buf,bufsize);
1131                         if (!s_quiet)
1132                                 {
1133                                 if ((i <= 0) || (buf[0] == 'Q'))
1134                                         {
1135                                         BIO_printf(bio_s_out,"DONE\n");
1136                                         SHUTDOWN(s);
1137                                         close_accept_socket();
1138                                         ret= -11;
1139                                         goto err;
1140                                         }
1141                                 if ((i <= 0) || (buf[0] == 'q'))
1142                                         {
1143                                         BIO_printf(bio_s_out,"DONE\n");
1144                                         SHUTDOWN(s);
1145         /*                              close_accept_socket();
1146                                         ret= -11;*/
1147                                         goto err;
1148                                         }
1149                                 if ((buf[0] == 'r') &&
1150                                         ((buf[1] == '\n') || (buf[1] == '\r')))
1151                                         {
1152                                         SSL_renegotiate(con);
1153                                         i=SSL_do_handshake(con);
1154                                         printf("SSL_do_handshake -> %d\n",i);
1155                                         i=0; /*13; */
1156                                         continue;
1157                                         /* strcpy(buf,"server side RE-NEGOTIATE\n"); */
1158                                         }
1159                                 if ((buf[0] == 'R') &&
1160                                         ((buf[1] == '\n') || (buf[1] == '\r')))
1161                                         {
1162                                         SSL_set_verify(con,
1163                                                 SSL_VERIFY_PEER|SSL_VERIFY_CLIENT_ONCE,NULL);
1164                                         SSL_renegotiate(con);
1165                                         i=SSL_do_handshake(con);
1166                                         printf("SSL_do_handshake -> %d\n",i);
1167                                         i=0; /* 13; */
1168                                         continue;
1169                                         /* strcpy(buf,"server side RE-NEGOTIATE asking for client cert\n"); */
1170                                         }
1171                                 if (buf[0] == 'P')
1172                                         {
1173                                         static char *str="Lets print some clear text\n";
1174                                         BIO_write(SSL_get_wbio(con),str,strlen(str));
1175                                         }
1176                                 if (buf[0] == 'S')
1177                                         {
1178                                         print_stats(bio_s_out,SSL_get_SSL_CTX(con));
1179                                         }
1180                                 }
1181 #ifdef CHARSET_EBCDIC
1182                         ebcdic2ascii(buf,buf,i);
1183 #endif
1184                         l=k=0;
1185                         for (;;)
1186                                 {
1187                                 /* should do a select for the write */
1188 #ifdef RENEG
1189 { static count=0; if (++count == 100) { count=0; SSL_renegotiate(con); } }
1190 #endif
1191                                 k=SSL_write(con,&(buf[l]),(unsigned int)i);
1192                                 switch (SSL_get_error(con,k))
1193                                         {
1194                                 case SSL_ERROR_NONE:
1195                                         break;
1196                                 case SSL_ERROR_WANT_WRITE:
1197                                 case SSL_ERROR_WANT_READ:
1198                                 case SSL_ERROR_WANT_X509_LOOKUP:
1199                                         BIO_printf(bio_s_out,"Write BLOCK\n");
1200                                         break;
1201                                 case SSL_ERROR_SYSCALL:
1202                                 case SSL_ERROR_SSL:
1203                                         BIO_printf(bio_s_out,"ERROR\n");
1204                                         ERR_print_errors(bio_err);
1205                                         ret=1;
1206                                         goto err;
1207                                         /* break; */
1208                                 case SSL_ERROR_ZERO_RETURN:
1209                                         BIO_printf(bio_s_out,"DONE\n");
1210                                         ret=1;
1211                                         goto err;
1212                                         }
1213                                 l+=k;
1214                                 i-=k;
1215                                 if (i <= 0) break;
1216                                 }
1217                         }
1218                 if (read_from_sslcon)
1219                         {
1220                         if (!SSL_is_init_finished(con))
1221                                 {
1222                                 i=init_ssl_connection(con);
1223
1224                                 if (i < 0)
1225                                         {
1226                                         ret=0;
1227                                         goto err;
1228                                         }
1229                                 else if (i == 0)
1230                                         {
1231                                         ret=1;
1232                                         goto err;
1233                                         }
1234                                 }
1235                         else
1236                                 {
1237 again:
1238                                 i=SSL_read(con,(char *)buf,bufsize);
1239                                 switch (SSL_get_error(con,i))
1240                                         {
1241                                 case SSL_ERROR_NONE:
1242 #ifdef CHARSET_EBCDIC
1243                                         ascii2ebcdic(buf,buf,i);
1244 #endif
1245                                         write(fileno(stdout),buf,
1246                                                 (unsigned int)i);
1247                                         if (SSL_pending(con)) goto again;
1248                                         break;
1249                                 case SSL_ERROR_WANT_WRITE:
1250                                 case SSL_ERROR_WANT_READ:
1251                                 case SSL_ERROR_WANT_X509_LOOKUP:
1252                                         BIO_printf(bio_s_out,"Read BLOCK\n");
1253                                         break;
1254                                 case SSL_ERROR_SYSCALL:
1255                                 case SSL_ERROR_SSL:
1256                                         BIO_printf(bio_s_out,"ERROR\n");
1257                                         ERR_print_errors(bio_err);
1258                                         ret=1;
1259                                         goto err;
1260                                 case SSL_ERROR_ZERO_RETURN:
1261                                         BIO_printf(bio_s_out,"DONE\n");
1262                                         ret=1;
1263                                         goto err;
1264                                         }
1265                                 }
1266                         }
1267                 }
1268 err:
1269         BIO_printf(bio_s_out,"shutting down SSL\n");
1270 #if 1
1271         SSL_set_shutdown(con,SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
1272 #else
1273         SSL_shutdown(con);
1274 #endif
1275         if (con != NULL) SSL_free(con);
1276         BIO_printf(bio_s_out,"CONNECTION CLOSED\n");
1277         if (buf != NULL)
1278                 {
1279                 OPENSSL_cleanse(buf,bufsize);
1280                 OPENSSL_free(buf);
1281                 }
1282         if (ret >= 0)
1283                 BIO_printf(bio_s_out,"ACCEPT\n");
1284         return(ret);
1285         }
1286
1287 static void close_accept_socket(void)
1288         {
1289         BIO_printf(bio_err,"shutdown accept socket\n");
1290         if (accept_socket >= 0)
1291                 {
1292                 SHUTDOWN2(accept_socket);
1293                 }
1294         }
1295
1296 static int init_ssl_connection(SSL *con)
1297         {
1298         int i;
1299         const char *str;
1300         X509 *peer;
1301         long verify_error;
1302         MS_STATIC char buf[BUFSIZ];
1303
1304         if ((i=SSL_accept(con)) <= 0)
1305                 {
1306                 if (BIO_sock_should_retry(i))
1307                         {
1308                         BIO_printf(bio_s_out,"DELAY\n");
1309                         return(1);
1310                         }
1311
1312                 BIO_printf(bio_err,"ERROR\n");
1313                 verify_error=SSL_get_verify_result(con);
1314                 if (verify_error != X509_V_OK)
1315                         {
1316                         BIO_printf(bio_err,"verify error:%s\n",
1317                                 X509_verify_cert_error_string(verify_error));
1318                         }
1319                 else
1320                         ERR_print_errors(bio_err);
1321                 return(0);
1322                 }
1323
1324         PEM_write_bio_SSL_SESSION(bio_s_out,SSL_get_session(con));
1325
1326         peer=SSL_get_peer_certificate(con);
1327         if (peer != NULL)
1328                 {
1329                 BIO_printf(bio_s_out,"Client certificate\n");
1330                 PEM_write_bio_X509(bio_s_out,peer);
1331                 X509_NAME_oneline(X509_get_subject_name(peer),buf,sizeof buf);
1332                 BIO_printf(bio_s_out,"subject=%s\n",buf);
1333                 X509_NAME_oneline(X509_get_issuer_name(peer),buf,sizeof buf);
1334                 BIO_printf(bio_s_out,"issuer=%s\n",buf);
1335                 X509_free(peer);
1336                 }
1337
1338         if (SSL_get_shared_ciphers(con,buf,sizeof buf) != NULL)
1339                 BIO_printf(bio_s_out,"Shared ciphers:%s\n",buf);
1340         str=SSL_CIPHER_get_name(SSL_get_current_cipher(con));
1341         BIO_printf(bio_s_out,"CIPHER is %s\n",(str != NULL)?str:"(NONE)");
1342         if (con->hit) BIO_printf(bio_s_out,"Reused session-id\n");
1343         if (SSL_ctrl(con,SSL_CTRL_GET_FLAGS,0,NULL) &
1344                 TLS1_FLAGS_TLS_PADDING_BUG)
1345                 BIO_printf(bio_s_out,"Peer has incorrect TLSv1 block padding\n");
1346 #ifndef OPENSSL_NO_KRB5
1347         if (con->kssl_ctx->client_princ != NULL)
1348                 {
1349                 BIO_printf(bio_s_out,"Kerberos peer principal is %s\n",
1350                         con->kssl_ctx->client_princ);
1351                 }
1352 #endif /* OPENSSL_NO_KRB5 */
1353         return(1);
1354         }
1355
1356 #ifndef OPENSSL_NO_DH
1357 static DH *load_dh_param(char *dhfile)
1358         {
1359         DH *ret=NULL;
1360         BIO *bio;
1361
1362         if ((bio=BIO_new_file(dhfile,"r")) == NULL)
1363                 goto err;
1364         ret=PEM_read_bio_DHparams(bio,NULL,NULL,NULL);
1365 err:
1366         if (bio != NULL) BIO_free(bio);
1367         return(ret);
1368         }
1369 #endif
1370
1371 #if 0
1372 static int load_CA(SSL_CTX *ctx, char *file)
1373         {
1374         FILE *in;
1375         X509 *x=NULL;
1376
1377         if ((in=fopen(file,"r")) == NULL)
1378                 return(0);
1379
1380         for (;;)
1381                 {
1382                 if (PEM_read_X509(in,&x,NULL) == NULL)
1383                         break;
1384                 SSL_CTX_add_client_CA(ctx,x);
1385                 }
1386         if (x != NULL) X509_free(x);
1387         fclose(in);
1388         return(1);
1389         }
1390 #endif
1391
1392 static int www_body(char *hostname, int s, unsigned char *context)
1393         {
1394         char *buf=NULL;
1395         int ret=1;
1396         int i,j,k,blank,dot;
1397         struct stat st_buf;
1398         SSL *con;
1399         SSL_CIPHER *c;
1400         BIO *io,*ssl_bio,*sbio;
1401         long total_bytes;
1402
1403         buf=OPENSSL_malloc(bufsize);
1404         if (buf == NULL) return(0);
1405         io=BIO_new(BIO_f_buffer());
1406         ssl_bio=BIO_new(BIO_f_ssl());
1407         if ((io == NULL) || (ssl_bio == NULL)) goto err;
1408
1409 #ifdef FIONBIO
1410         if (s_nbio)
1411                 {
1412                 unsigned long sl=1;
1413
1414                 if (!s_quiet)
1415                         BIO_printf(bio_err,"turning on non blocking io\n");
1416                 if (BIO_socket_ioctl(s,FIONBIO,&sl) < 0)
1417                         ERR_print_errors(bio_err);
1418                 }
1419 #endif
1420
1421         /* lets make the output buffer a reasonable size */
1422         if (!BIO_set_write_buffer_size(io,bufsize)) goto err;
1423
1424         if ((con=SSL_new(ctx)) == NULL) goto err;
1425 #ifndef OPENSSL_NO_KRB5
1426         if ((con->kssl_ctx = kssl_ctx_new()) != NULL)
1427                 {
1428                 kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVICE, KRB5SVC);
1429                 kssl_ctx_setstring(con->kssl_ctx, KSSL_KEYTAB, KRB5KEYTAB);
1430                 }
1431 #endif  /* OPENSSL_NO_KRB5 */
1432         if(context) SSL_set_session_id_context(con, context,
1433                                                strlen((char *)context));
1434
1435         sbio=BIO_new_socket(s,BIO_NOCLOSE);
1436         if (s_nbio_test)
1437                 {
1438                 BIO *test;
1439
1440                 test=BIO_new(BIO_f_nbio_test());
1441                 sbio=BIO_push(test,sbio);
1442                 }
1443         SSL_set_bio(con,sbio,sbio);
1444         SSL_set_accept_state(con);
1445
1446         /* SSL_set_fd(con,s); */
1447         BIO_set_ssl(ssl_bio,con,BIO_CLOSE);
1448         BIO_push(io,ssl_bio);
1449 #ifdef CHARSET_EBCDIC
1450         io = BIO_push(BIO_new(BIO_f_ebcdic_filter()),io);
1451 #endif
1452
1453         if (s_debug)
1454                 {
1455                 con->debug=1;
1456                 BIO_set_callback(SSL_get_rbio(con),bio_dump_cb);
1457                 BIO_set_callback_arg(SSL_get_rbio(con),bio_s_out);
1458                 }
1459         if (s_msg)
1460                 {
1461                 SSL_set_msg_callback(con, msg_cb);
1462                 SSL_set_msg_callback_arg(con, bio_s_out);
1463                 }
1464
1465         blank=0;
1466         for (;;)
1467                 {
1468                 if (hack)
1469                         {
1470                         i=SSL_accept(con);
1471
1472                         switch (SSL_get_error(con,i))
1473                                 {
1474                         case SSL_ERROR_NONE:
1475                                 break;
1476                         case SSL_ERROR_WANT_WRITE:
1477                         case SSL_ERROR_WANT_READ:
1478                         case SSL_ERROR_WANT_X509_LOOKUP:
1479                                 continue;
1480                         case SSL_ERROR_SYSCALL:
1481                         case SSL_ERROR_SSL:
1482                         case SSL_ERROR_ZERO_RETURN:
1483                                 ret=1;
1484                                 goto err;
1485                                 /* break; */
1486                                 }
1487
1488                         SSL_renegotiate(con);
1489                         SSL_write(con,NULL,0);
1490                         }
1491
1492                 i=BIO_gets(io,buf,bufsize-1);
1493                 if (i < 0) /* error */
1494                         {
1495                         if (!BIO_should_retry(io))
1496                                 {
1497                                 if (!s_quiet)
1498                                         ERR_print_errors(bio_err);
1499                                 goto err;
1500                                 }
1501                         else
1502                                 {
1503                                 BIO_printf(bio_s_out,"read R BLOCK\n");
1504 #if !defined(OPENSSL_SYS_MSDOS) && !defined(__DJGPP__)
1505                                 sleep(1);
1506 #endif
1507                                 continue;
1508                                 }
1509                         }
1510                 else if (i == 0) /* end of input */
1511                         {
1512                         ret=1;
1513                         goto end;
1514                         }
1515
1516                 /* else we have data */
1517                 if (    ((www == 1) && (strncmp("GET ",buf,4) == 0)) ||
1518                         ((www == 2) && (strncmp("GET /stats ",buf,10) == 0)))
1519                         {
1520                         char *p;
1521                         X509 *peer;
1522                         STACK_OF(SSL_CIPHER) *sk;
1523                         static char *space="                          ";
1524
1525                         BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n");
1526                         BIO_puts(io,"<HTML><BODY BGCOLOR=\"#ffffff\">\n");
1527                         BIO_puts(io,"<pre>\n");
1528 /*                      BIO_puts(io,SSLeay_version(SSLEAY_VERSION));*/
1529                         BIO_puts(io,"\n");
1530                         for (i=0; i<local_argc; i++)
1531                                 {
1532                                 BIO_puts(io,local_argv[i]);
1533                                 BIO_write(io," ",1);
1534                                 }
1535                         BIO_puts(io,"\n");
1536
1537                         /* The following is evil and should not really
1538                          * be done */
1539                         BIO_printf(io,"Ciphers supported in s_server binary\n");
1540                         sk=SSL_get_ciphers(con);
1541                         j=sk_SSL_CIPHER_num(sk);
1542                         for (i=0; i<j; i++)
1543                                 {
1544                                 c=sk_SSL_CIPHER_value(sk,i);
1545                                 BIO_printf(io,"%-11s:%-25s",
1546                                         SSL_CIPHER_get_version(c),
1547                                         SSL_CIPHER_get_name(c));
1548                                 if ((((i+1)%2) == 0) && (i+1 != j))
1549                                         BIO_puts(io,"\n");
1550                                 }
1551                         BIO_puts(io,"\n");
1552                         p=SSL_get_shared_ciphers(con,buf,bufsize);
1553                         if (p != NULL)
1554                                 {
1555                                 BIO_printf(io,"---\nCiphers common between both SSL end points:\n");
1556                                 j=i=0;
1557                                 while (*p)
1558                                         {
1559                                         if (*p == ':')
1560                                                 {
1561                                                 BIO_write(io,space,26-j);
1562                                                 i++;
1563                                                 j=0;
1564                                                 BIO_write(io,((i%3)?" ":"\n"),1);
1565                                                 }
1566                                         else
1567                                                 {
1568                                                 BIO_write(io,p,1);
1569                                                 j++;
1570                                                 }
1571                                         p++;
1572                                         }
1573                                 BIO_puts(io,"\n");
1574                                 }
1575                         BIO_printf(io,((con->hit)
1576                                 ?"---\nReused, "
1577                                 :"---\nNew, "));
1578                         c=SSL_get_current_cipher(con);
1579                         BIO_printf(io,"%s, Cipher is %s\n",
1580                                 SSL_CIPHER_get_version(c),
1581                                 SSL_CIPHER_get_name(c));
1582                         SSL_SESSION_print(io,SSL_get_session(con));
1583                         BIO_printf(io,"---\n");
1584                         print_stats(io,SSL_get_SSL_CTX(con));
1585                         BIO_printf(io,"---\n");
1586                         peer=SSL_get_peer_certificate(con);
1587                         if (peer != NULL)
1588                                 {
1589                                 BIO_printf(io,"Client certificate\n");
1590                                 X509_print(io,peer);
1591                                 PEM_write_bio_X509(io,peer);
1592                                 }
1593                         else
1594                                 BIO_puts(io,"no client certificate available\n");
1595                         BIO_puts(io,"</BODY></HTML>\r\n\r\n");
1596                         break;
1597                         }
1598                 else if ((www == 2 || www == 3)
1599                          && (strncmp("GET /",buf,5) == 0))
1600                         {
1601                         BIO *file;
1602                         char *p,*e;
1603                         static char *text="HTTP/1.0 200 ok\r\nContent-type: text/plain\r\n\r\n";
1604
1605                         /* skip the '/' */
1606                         p= &(buf[5]);
1607
1608                         dot = 1;
1609                         for (e=p; *e != '\0'; e++)
1610                                 {
1611                                 if (e[0] == ' ')
1612                                         break;
1613
1614                                 switch (dot)
1615                                         {
1616                                 case 1:
1617                                         dot = (e[0] == '.') ? 2 : 0;
1618                                         break;
1619                                 case 2:
1620                                         dot = (e[0] == '.') ? 3 : 0;
1621                                         break;
1622                                 case 3:
1623                                         dot = (e[0] == '/') ? -1 : 0;
1624                                         break;
1625                                         }
1626                                 if (dot == 0)
1627                                         dot = (e[0] == '/') ? 1 : 0;
1628                                 }
1629                         dot = (dot == 3) || (dot == -1); /* filename contains ".." component */
1630
1631                         if (*e == '\0')
1632                                 {
1633                                 BIO_puts(io,text);
1634                                 BIO_printf(io,"'%s' is an invalid file name\r\n",p);
1635                                 break;
1636                                 }
1637                         *e='\0';
1638
1639                         if (dot)
1640                                 {
1641                                 BIO_puts(io,text);
1642                                 BIO_printf(io,"'%s' contains '..' reference\r\n",p);
1643                                 break;
1644                                 }
1645
1646                         if (*p == '/')
1647                                 {
1648                                 BIO_puts(io,text);
1649                                 BIO_printf(io,"'%s' is an invalid path\r\n",p);
1650                                 break;
1651                                 }
1652
1653 #if 0
1654                         /* append if a directory lookup */
1655                         if (e[-1] == '/')
1656                                 strcat(p,"index.html");
1657 #endif
1658
1659                         /* if a directory, do the index thang */
1660                         if (stat(p,&st_buf) < 0)
1661                                 {
1662                                 BIO_puts(io,text);
1663                                 BIO_printf(io,"Error accessing '%s'\r\n",p);
1664                                 ERR_print_errors(io);
1665                                 break;
1666                                 }
1667                         if (S_ISDIR(st_buf.st_mode))
1668                                 {
1669 #if 0 /* must check buffer size */
1670                                 strcat(p,"/index.html");
1671 #else
1672                                 BIO_puts(io,text);
1673                                 BIO_printf(io,"'%s' is a directory\r\n",p);
1674                                 break;
1675 #endif
1676                                 }
1677
1678                         if ((file=BIO_new_file(p,"r")) == NULL)
1679                                 {
1680                                 BIO_puts(io,text);
1681                                 BIO_printf(io,"Error opening '%s'\r\n",p);
1682                                 ERR_print_errors(io);
1683                                 break;
1684                                 }
1685
1686                         if (!s_quiet)
1687                                 BIO_printf(bio_err,"FILE:%s\n",p);
1688
1689                         if (www == 2)
1690                                 {
1691                                 i=strlen(p);
1692                                 if (    ((i > 5) && (strcmp(&(p[i-5]),".html") == 0)) ||
1693                                         ((i > 4) && (strcmp(&(p[i-4]),".php") == 0)) ||
1694                                         ((i > 4) && (strcmp(&(p[i-4]),".htm") == 0)))
1695                                         BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/html\r\n\r\n");
1696                                 else
1697                                         BIO_puts(io,"HTTP/1.0 200 ok\r\nContent-type: text/plain\r\n\r\n");
1698                                 }
1699                         /* send the file */
1700                         total_bytes=0;
1701                         for (;;)
1702                                 {
1703                                 i=BIO_read(file,buf,bufsize);
1704                                 if (i <= 0) break;
1705
1706 #ifdef RENEG
1707                                 total_bytes+=i;
1708                                 fprintf(stderr,"%d\n",i);
1709                                 if (total_bytes > 3*1024)
1710                                         {
1711                                         total_bytes=0;
1712                                         fprintf(stderr,"RENEGOTIATE\n");
1713                                         SSL_renegotiate(con);
1714                                         }
1715 #endif
1716
1717                                 for (j=0; j<i; )
1718                                         {
1719 #ifdef RENEG
1720 { static count=0; if (++count == 13) { SSL_renegotiate(con); } }
1721 #endif
1722                                         k=BIO_write(io,&(buf[j]),i-j);
1723                                         if (k <= 0)
1724                                                 {
1725                                                 if (!BIO_should_retry(io))
1726                                                         goto write_error;
1727                                                 else
1728                                                         {
1729                                                         BIO_printf(bio_s_out,"rwrite W BLOCK\n");
1730                                                         }
1731                                                 }
1732                                         else
1733                                                 {
1734                                                 j+=k;
1735                                                 }
1736                                         }
1737                                 }
1738 write_error:
1739                         BIO_free(file);
1740                         break;
1741                         }
1742                 }
1743
1744         for (;;)
1745                 {
1746                 i=(int)BIO_flush(io);
1747                 if (i <= 0)
1748                         {
1749                         if (!BIO_should_retry(io))
1750                                 break;
1751                         }
1752                 else
1753                         break;
1754                 }
1755 end:
1756 #if 1
1757         /* make sure we re-use sessions */
1758         SSL_set_shutdown(con,SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
1759 #else
1760         /* This kills performance */
1761 /*      SSL_shutdown(con); A shutdown gets sent in the
1762  *      BIO_free_all(io) procession */
1763 #endif
1764
1765 err:
1766
1767         if (ret >= 0)
1768                 BIO_printf(bio_s_out,"ACCEPT\n");
1769
1770         if (buf != NULL) OPENSSL_free(buf);
1771         if (io != NULL) BIO_free_all(io);
1772 /*      if (ssl_bio != NULL) BIO_free(ssl_bio);*/
1773         return(ret);
1774         }
1775
1776 #ifndef OPENSSL_NO_RSA
1777 static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
1778         {
1779         static RSA *rsa_tmp=NULL;
1780
1781         if (rsa_tmp == NULL)
1782                 {
1783                 if (!s_quiet)
1784                         {
1785                         BIO_printf(bio_err,"Generating temp (%d bit) RSA key...",keylength);
1786                         (void)BIO_flush(bio_err);
1787                         }
1788                 rsa_tmp=RSA_generate_key(keylength,RSA_F4,NULL,NULL);
1789                 if (!s_quiet)
1790                         {
1791                         BIO_printf(bio_err,"\n");
1792                         (void)BIO_flush(bio_err);
1793                         }
1794                 }
1795         return(rsa_tmp);
1796         }
1797 #endif
1798
1799 #define MAX_SESSION_ID_ATTEMPTS 10
1800 static int generate_session_id(const SSL *ssl, unsigned char *id,
1801                                 unsigned int *id_len)
1802         {
1803         unsigned int count = 0;
1804         do      {
1805                 RAND_pseudo_bytes(id, *id_len);
1806                 /* Prefix the session_id with the required prefix. NB: If our
1807                  * prefix is too long, clip it - but there will be worse effects
1808                  * anyway, eg. the server could only possibly create 1 session
1809                  * ID (ie. the prefix!) so all future session negotiations will
1810                  * fail due to conflicts. */
1811                 memcpy(id, session_id_prefix,
1812                         (strlen(session_id_prefix) < *id_len) ?
1813                         strlen(session_id_prefix) : *id_len);
1814                 }
1815         while(SSL_has_matching_session_id(ssl, id, *id_len) &&
1816                 (++count < MAX_SESSION_ID_ATTEMPTS));
1817         if(count >= MAX_SESSION_ID_ATTEMPTS)
1818                 return 0;
1819         return 1;
1820         }