ssl/s2_lib.c

   1 /* ssl/s2_lib.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 #include <stdio.h>
  60 #include "rsa.h"
  61 #include "objects.h"
  62 #include "ssl_locl.h"
  63
  64 #ifndef NOPROTO
  65 static long ssl2_default_timeout(void );
  66 #else
  67 static long ssl2_default_timeout();
  68 #endif
  69
  70 char *ssl2_version_str="SSLv2 part of OpenSSL 0.9.1c 23-Dec-1998";
  71
  72 #define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
  73
  74 SSL_CIPHER ssl2_ciphers[]={
  75 /* NULL_WITH_MD5 v3 */
  76 #if 0
  77         {
  78         1,
  79         SSL2_TXT_NULL_WITH_MD5,
  80         SSL2_CK_NULL_WITH_MD5,
  81         SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5|SSL_EXP|SSL_SSLV2,
  82         0,
  83         SSL_ALL_CIPHERS,
  84         },
  85 #endif
  86 /* RC4_128_EXPORT40_WITH_MD5 */
  87         {
  88         1,
  89         SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
  90         SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
  91         SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_EXP|SSL_SSLV2,
  92         SSL2_CF_5_BYTE_ENC,
  93         SSL_ALL_CIPHERS,
  94         },
  95 /* RC4_128_WITH_MD5 */
  96         {
  97         1,
  98         SSL2_TXT_RC4_128_WITH_MD5,
  99         SSL2_CK_RC4_128_WITH_MD5,
 100         SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
 101         0,
 102         SSL_ALL_CIPHERS,
 103         },
 104 /* RC2_128_CBC_EXPORT40_WITH_MD5 */
 105         {
 106         1,
 107         SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
 108         SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
 109         SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_EXP|SSL_SSLV2,
 110         SSL2_CF_5_BYTE_ENC,
 111         SSL_ALL_CIPHERS,
 112         },
 113 /* RC2_128_CBC_WITH_MD5 */
 114         {
 115         1,
 116         SSL2_TXT_RC2_128_CBC_WITH_MD5,
 117         SSL2_CK_RC2_128_CBC_WITH_MD5,
 118         SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
 119         0,
 120         SSL_ALL_CIPHERS,
 121         },
 122 /* IDEA_128_CBC_WITH_MD5 */
 123         {
 124         1,
 125         SSL2_TXT_IDEA_128_CBC_WITH_MD5,
 126         SSL2_CK_IDEA_128_CBC_WITH_MD5,
 127         SSL_kRSA|SSL_aRSA|SSL_IDEA|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_MEDIUM,
 128         0,
 129         SSL_ALL_CIPHERS,
 130         },
 131 /* DES_64_CBC_WITH_MD5 */
 132         {
 133         1,
 134         SSL2_TXT_DES_64_CBC_WITH_MD5,
 135         SSL2_CK_DES_64_CBC_WITH_MD5,
 136         SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_LOW,
 137         0,
 138         SSL_ALL_CIPHERS,
 139         },
 140 /* DES_192_EDE3_CBC_WITH_MD5 */
 141         {
 142         1,
 143         SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
 144         SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
 145         SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5|SSL_NOT_EXP|SSL_SSLV2|SSL_HIGH,
 146         0,
 147         SSL_ALL_CIPHERS,
 148         },
 149 /* RC4_64_WITH_MD5 */
 150 #if 1
 151         {
 152         1,
 153         SSL2_TXT_RC4_64_WITH_MD5,
 154         SSL2_CK_RC4_64_WITH_MD5,
 155         SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2|SSL_LOW,
 156         SSL2_CF_8_BYTE_ENC,
 157         SSL_ALL_CIPHERS,
 158         },
 159 #endif
 160 /* NULL SSLeay (testing) */
 161 #if 0
 162         {
 163         0,
 164         SSL2_TXT_NULL,
 165         SSL2_CK_NULL,
 166         0,
 167         SSL_ALL_CIPHERS,
 168         },
 169 #endif
 170
 171 /* end of list :-) */
 172         };
 173
 174 static SSL_METHOD SSLv2_data= {
 175         SSL2_VERSION,
 176         ssl2_new,       /* local */
 177         ssl2_clear,     /* local */
 178         ssl2_free,      /* local */
 179         ssl_undefined_function,
 180         ssl_undefined_function,
 181         ssl2_read,
 182         ssl2_peek,
 183         ssl2_write,
 184         ssl2_shutdown,
 185         ssl_ok, /* NULL - renegotiate */
 186         ssl_ok, /* NULL - check renegotiate */
 187         ssl2_ctrl,      /* local */
 188         ssl2_ctx_ctrl,  /* local */
 189         ssl2_get_cipher_by_char,
 190         ssl2_put_cipher_by_char,
 191         ssl2_pending,
 192         ssl2_num_ciphers,
 193         ssl2_get_cipher,
 194         ssl_bad_method,
 195         ssl2_default_timeout,
 196         &ssl3_undef_enc_method,
 197         };
 198
 199 static long ssl2_default_timeout()
 200         {
 201         return(300);
 202         }
 203
 204 SSL_METHOD *sslv2_base_method()
 205         {
 206         return(&SSLv2_data);
 207         }
 208
 209 int ssl2_num_ciphers()
 210         {
 211         return(SSL2_NUM_CIPHERS);
 212         }
 213
 214 SSL_CIPHER *ssl2_get_cipher(u)
 215 unsigned int u;
 216         {
 217         if (u < SSL2_NUM_CIPHERS)
 218                 return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
 219         else
 220                 return(NULL);
 221         }
 222
 223 int ssl2_pending(s)
 224 SSL *s;
 225         {
 226         return(s->s2->ract_data_length);
 227         }
 228
 229 int ssl2_new(s)
 230 SSL *s;
 231         {
 232         SSL2_CTX *s2;
 233
 234         if ((s2=(SSL2_CTX *)Malloc(sizeof(SSL2_CTX))) == NULL) goto err;
 235         memset(s2,0,sizeof(SSL2_CTX));
 236
 237         if ((s2->rbuf=(unsigned char *)Malloc(
 238                 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
 239         if ((s2->wbuf=(unsigned char *)Malloc(
 240                 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
 241         s->s2=s2;
 242
 243         ssl2_clear(s);
 244         return(1);
 245 err:
 246         if (s2 != NULL)
 247                 {
 248                 if (s2->wbuf != NULL) Free(s2->wbuf);
 249                 if (s2->rbuf != NULL) Free(s2->rbuf);
 250                 Free(s2);
 251                 }
 252         return(0);
 253         }
 254
 255 void ssl2_free(s)
 256 SSL *s;
 257         {
 258         SSL2_CTX *s2;
 259
 260         s2=s->s2;
 261         if (s2->rbuf != NULL) Free(s2->rbuf);
 262         if (s2->wbuf != NULL) Free(s2->wbuf);
 263         memset(s2,0,sizeof(SSL2_CTX));
 264         Free(s2);
 265         s->s2=NULL;
 266         }
 267
 268 void ssl2_clear(s)
 269 SSL *s;
 270         {
 271         SSL2_CTX *s2;
 272         unsigned char *rbuf,*wbuf;
 273
 274         s2=s->s2;
 275
 276         rbuf=s2->rbuf;
 277         wbuf=s2->wbuf;
 278
 279         memset(s2,0,sizeof(SSL2_CTX));
 280
 281         s2->rbuf=rbuf;
 282         s2->wbuf=wbuf;
 283         s2->clear_text=1;
 284         s->packet=s2->rbuf;
 285         s->version=SSL2_VERSION;
 286         s->packet_length=0;
 287         }
 288
 289 long ssl2_ctrl(s,cmd,larg,parg)
 290 SSL *s;
 291 int cmd;
 292 long larg;
 293 char *parg;
 294         {
 295         int ret=0;
 296
 297         switch(cmd)
 298                 {
 299         case SSL_CTRL_GET_SESSION_REUSED:
 300                 ret=s->hit;
 301                 break;
 302         default:
 303                 break;
 304                 }
 305         return(ret);
 306         }
 307
 308 long ssl2_ctx_ctrl(ctx,cmd,larg,parg)
 309 SSL_CTX *ctx;
 310 int cmd;
 311 long larg;
 312 char *parg;
 313         {
 314         return(0);
 315         }
 316
 317 /* This function needs to check if the ciphers required are actually
 318  * available */
 319 SSL_CIPHER *ssl2_get_cipher_by_char(p)
 320 unsigned char *p;
 321         {
 322         static int init=1;
 323         static SSL_CIPHER *sorted[SSL2_NUM_CIPHERS];
 324         SSL_CIPHER c,*cp= &c,**cpp;
 325         unsigned long id;
 326         int i;
 327
 328         if (init)
 329                 {
 330                 init=0;
 331
 332                 for (i=0; i<SSL2_NUM_CIPHERS; i++)
 333                         sorted[i]= &(ssl2_ciphers[i]);
 334
 335                 qsort(  (char *)sorted,
 336                         SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 337                         FP_ICC ssl_cipher_ptr_id_cmp);
 338                 }
 339
 340         id=0x02000000L|((unsigned long)p[0]<<16L)|
 341                 ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
 342         c.id=id;
 343         cpp=(SSL_CIPHER **)OBJ_bsearch((char *)&cp,
 344                 (char *)sorted,
 345                 SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER *),
 346                 (int (*)())ssl_cipher_ptr_id_cmp);
 347         if ((cpp == NULL) || !(*cpp)->valid)
 348                 return(NULL);
 349         else
 350                 return(*cpp);
 351         }
 352
 353 int ssl2_put_cipher_by_char(c,p)
 354 SSL_CIPHER *c;
 355 unsigned char *p;
 356         {
 357         long l;
 358
 359         if (p != NULL)
 360                 {
 361                 l=c->id;
 362                 if ((l & 0xff000000) != 0x02000000) return(0);
 363                 p[0]=((unsigned char)(l>>16L))&0xFF;
 364                 p[1]=((unsigned char)(l>> 8L))&0xFF;
 365                 p[2]=((unsigned char)(l     ))&0xFF;
 366                 }
 367         return(3);
 368         }
 369
 370 void ssl2_generate_key_material(s)
 371 SSL *s;
 372         {
 373         unsigned int i;
 374         MD5_CTX ctx;
 375         unsigned char *km;
 376         unsigned char c='0';
 377
 378         km=s->s2->key_material;
 379         for (i=0; i<s->s2->key_material_length; i+=MD5_DIGEST_LENGTH)
 380                 {
 381                 MD5_Init(&ctx);
 382
 383                 MD5_Update(&ctx,s->session->master_key,s->session->master_key_length);
 384                 MD5_Update(&ctx,(unsigned char *)&c,1);
 385                 c++;
 386                 MD5_Update(&ctx,s->s2->challenge,s->s2->challenge_length);
 387                 MD5_Update(&ctx,s->s2->conn_id,s->s2->conn_id_length);
 388                 MD5_Final(km,&ctx);
 389                 km+=MD5_DIGEST_LENGTH;
 390                 }
 391         }
 392
 393 void ssl2_return_error(s,err)
 394 SSL *s;
 395 int err;
 396         {
 397         if (!s->error)
 398                 {
 399                 s->error=3;
 400                 s->error_code=err;
 401
 402                 ssl2_write_error(s);
 403                 }
 404         }
 405
 406
 407 void ssl2_write_error(s)
 408 SSL *s;
 409         {
 410         char buf[3];
 411         int i,error;
 412
 413         buf[0]=SSL2_MT_ERROR;
 414         buf[1]=(s->error_code>>8)&0xff;
 415         buf[2]=(s->error_code)&0xff;
 416
 417 /*      state=s->rwstate;*/
 418         error=s->error;
 419         s->error=0;
 420         i=ssl2_write(s,&(buf[3-error]),error);
 421 /*      if (i == error) s->rwstate=state; */
 422
 423         if (i < 0)
 424                 s->error=error;
 425         else if (i != s->error)
 426                 s->error=error-i;
 427         /* else
 428                 s->error=0; */
 429         }
 430
 431 int ssl2_shutdown(s)
 432 SSL *s;
 433         {
 434         s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 435         return(1);
 436         }
 437