ssl/ssl_asn1.c

   1 /* ssl/ssl_asn1.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 <stdlib.h>
  61 #include "ssl_locl.h"
  62 #include <openssl/asn1_mac.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/x509.h>
  65
  66 typedef struct ssl_session_asn1_st
  67         {
  68         ASN1_INTEGER version;
  69         ASN1_INTEGER ssl_version;
  70         ASN1_OCTET_STRING cipher;
  71         ASN1_OCTET_STRING master_key;
  72         ASN1_OCTET_STRING session_id;
  73         ASN1_OCTET_STRING session_id_context;
  74         ASN1_OCTET_STRING key_arg;
  75 #ifndef OPENSSL_NO_KRB5
  76         ASN1_OCTET_STRING krb5_princ;
  77 #endif /* OPENSSL_NO_KRB5 */
  78         ASN1_INTEGER time;
  79         ASN1_INTEGER timeout;
  80         ASN1_INTEGER verify_result;
  81 #ifndef OPENSSL_NO_TLSEXT
  82         ASN1_OCTET_STRING tlsext_hostname;
  83 #endif /* OPENSSL_NO_TLSEXT */
  84         } SSL_SESSION_ASN1;
  85
  86 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
  87         {
  88 #define LSIZE2 (sizeof(long)*2)
  89         int v1=0,v2=0,v3=0,v4=0,v5=0,v6=0;
  90         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
  91         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
  92         long l;
  93         SSL_SESSION_ASN1 a;
  94         M_ASN1_I2D_vars(in);
  95
  96         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
  97                 return(0);
  98
  99         /* Note that I cheat in the following 2 assignments.  I know
 100          * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
 101          * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
 102          * This is a bit evil but makes things simple, no dynamic allocation
 103          * to clean up :-) */
 104         a.version.length=LSIZE2;
 105         a.version.type=V_ASN1_INTEGER;
 106         a.version.data=ibuf1;
 107         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
 108
 109         a.ssl_version.length=LSIZE2;
 110         a.ssl_version.type=V_ASN1_INTEGER;
 111         a.ssl_version.data=ibuf2;
 112         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
 113
 114         a.cipher.type=V_ASN1_OCTET_STRING;
 115         a.cipher.data=buf;
 116
 117         if (in->cipher == NULL)
 118                 l=in->cipher_id;
 119         else
 120                 l=in->cipher->id;
 121         if (in->ssl_version == SSL2_VERSION)
 122                 {
 123                 a.cipher.length=3;
 124                 buf[0]=((unsigned char)(l>>16L))&0xff;
 125                 buf[1]=((unsigned char)(l>> 8L))&0xff;
 126                 buf[2]=((unsigned char)(l     ))&0xff;
 127                 }
 128         else
 129                 {
 130                 a.cipher.length=2;
 131                 buf[0]=((unsigned char)(l>>8L))&0xff;
 132                 buf[1]=((unsigned char)(l    ))&0xff;
 133                 }
 134
 135         a.master_key.length=in->master_key_length;
 136         a.master_key.type=V_ASN1_OCTET_STRING;
 137         a.master_key.data=in->master_key;
 138
 139         a.session_id.length=in->session_id_length;
 140         a.session_id.type=V_ASN1_OCTET_STRING;
 141         a.session_id.data=in->session_id;
 142
 143         a.session_id_context.length=in->sid_ctx_length;
 144         a.session_id_context.type=V_ASN1_OCTET_STRING;
 145         a.session_id_context.data=in->sid_ctx;
 146
 147         a.key_arg.length=in->key_arg_length;
 148         a.key_arg.type=V_ASN1_OCTET_STRING;
 149         a.key_arg.data=in->key_arg;
 150
 151 #ifndef OPENSSL_NO_KRB5
 152         if (in->krb5_client_princ_len)
 153                 {
 154                 a.krb5_princ.length=in->krb5_client_princ_len;
 155                 a.krb5_princ.type=V_ASN1_OCTET_STRING;
 156                 a.krb5_princ.data=in->krb5_client_princ;
 157                 }
 158 #endif /* OPENSSL_NO_KRB5 */
 159
 160         if (in->time != 0L)
 161                 {
 162                 a.time.length=LSIZE2;
 163                 a.time.type=V_ASN1_INTEGER;
 164                 a.time.data=ibuf3;
 165                 ASN1_INTEGER_set(&(a.time),in->time);
 166                 }
 167
 168         if (in->timeout != 0L)
 169                 {
 170                 a.timeout.length=LSIZE2;
 171                 a.timeout.type=V_ASN1_INTEGER;
 172                 a.timeout.data=ibuf4;
 173                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 174                 }
 175
 176         if (in->verify_result != X509_V_OK)
 177                 {
 178                 a.verify_result.length=LSIZE2;
 179                 a.verify_result.type=V_ASN1_INTEGER;
 180                 a.verify_result.data=ibuf5;
 181                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
 182                 }
 183
 184 #ifndef OPENSSL_NO_TLSEXT
 185         if (in->tlsext_hostname)
 186                 {
 187                 a.tlsext_hostname.length=strlen(in->tlsext_hostname);
 188                 a.tlsext_hostname.type=V_ASN1_OCTET_STRING;
 189                 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname;
 190                 }
 191 #endif /* OPENSSL_NO_TLSEXT */
 192
 193         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 194         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 195         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 196         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 197         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 198 #ifndef OPENSSL_NO_KRB5
 199         if (in->krb5_client_princ_len)
 200                 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 201 #endif /* OPENSSL_NO_KRB5 */
 202         if (in->key_arg_length > 0)
 203                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 204         if (in->time != 0L)
 205                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 206         if (in->timeout != 0L)
 207                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 208         if (in->peer != NULL)
 209                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 210         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 211         if (in->verify_result != X509_V_OK)
 212                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
 213
 214 #ifndef OPENSSL_NO_TLSEXT
 215         if (in->tlsext_hostname)
 216                 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
 217 #endif /* OPENSSL_NO_TLSEXT */
 218         M_ASN1_I2D_seq_total();
 219
 220         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 221         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 222         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 223         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 224         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 225 #ifndef OPENSSL_NO_KRB5
 226         if (in->krb5_client_princ_len)
 227                 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 228 #endif /* OPENSSL_NO_KRB5 */
 229         if (in->key_arg_length > 0)
 230                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 231         if (in->time != 0L)
 232                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 233         if (in->timeout != 0L)
 234                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 235         if (in->peer != NULL)
 236                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 237         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 238                                v4);
 239         if (in->verify_result != X509_V_OK)
 240                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
 241 #ifndef OPENSSL_NO_TLSEXT
 242         if (in->tlsext_hostname)
 243                 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6);
 244 #endif /* OPENSSL_NO_TLSEXT */
 245         M_ASN1_I2D_finish();
 246         }
 247
 248 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
 249              long length)
 250         {
 251         int version,ssl_version=0,i;
 252         long id;
 253         ASN1_INTEGER ai,*aip;
 254         ASN1_OCTET_STRING os,*osp;
 255         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 256
 257         aip= &ai;
 258         osp= &os;
 259
 260         M_ASN1_D2I_Init();
 261         M_ASN1_D2I_start_sequence();
 262
 263         ai.data=NULL; ai.length=0;
 264         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
 265         version=(int)ASN1_INTEGER_get(aip);
 266         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 267
 268         /* we don't care about the version right now :-) */
 269         M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER);
 270         ssl_version=(int)ASN1_INTEGER_get(aip);
 271         ret->ssl_version=ssl_version;
 272         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 273
 274         os.data=NULL; os.length=0;
 275         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 276         if (ssl_version == SSL2_VERSION)
 277                 {
 278                 if (os.length != 3)
 279                         {
 280                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 281                         goto err;
 282                         }
 283                 id=0x02000000L|
 284                         ((unsigned long)os.data[0]<<16L)|
 285                         ((unsigned long)os.data[1]<< 8L)|
 286                          (unsigned long)os.data[2];
 287                 }
 288         else if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
 289                 {
 290                 if (os.length != 2)
 291                         {
 292                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 293                         goto err;
 294                         }
 295                 id=0x03000000L|
 296                         ((unsigned long)os.data[0]<<8L)|
 297                          (unsigned long)os.data[1];
 298                 }
 299         else
 300                 {
 301                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 302                 return(NULL);
 303                 }
 304
 305         ret->cipher=NULL;
 306         ret->cipher_id=id;
 307
 308         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 309         if ((ssl_version>>8) == SSL3_VERSION_MAJOR)
 310                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 311         else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */
 312                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 313
 314         if (os.length > i)
 315                 os.length = i;
 316         if (os.length > (int)sizeof(ret->session_id)) /* can't happen */
 317                 os.length = sizeof(ret->session_id);
 318
 319         ret->session_id_length=os.length;
 320         OPENSSL_assert(os.length <= (int)sizeof(ret->session_id));
 321         memcpy(ret->session_id,os.data,os.length);
 322
 323         M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING);
 324         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
 325                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 326         else
 327                 ret->master_key_length=os.length;
 328         memcpy(ret->master_key,os.data,ret->master_key_length);
 329
 330         os.length=0;
 331
 332 #ifndef OPENSSL_NO_KRB5
 333         os.length=0;
 334         M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
 335         if (os.data)
 336                 {
 337                 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
 338                         ret->krb5_client_princ_len=0;
 339                 else
 340                         ret->krb5_client_princ_len=os.length;
 341                 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
 342                 OPENSSL_free(os.data);
 343                 os.data = NULL;
 344                 os.length = 0;
 345                 }
 346         else
 347                 ret->krb5_client_princ_len=0;
 348 #endif /* OPENSSL_NO_KRB5 */
 349
 350         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 351         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 352                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 353         else
 354                 ret->key_arg_length=os.length;
 355         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 356         if (os.data != NULL) OPENSSL_free(os.data);
 357
 358         ai.length=0;
 359         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 360         if (ai.data != NULL)
 361                 {
 362                 ret->time=ASN1_INTEGER_get(aip);
 363                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 364                 }
 365         else
 366                 ret->time=(unsigned long)time(NULL);
 367
 368         ai.length=0;
 369         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 370         if (ai.data != NULL)
 371                 {
 372                 ret->timeout=ASN1_INTEGER_get(aip);
 373                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 374                 }
 375         else
 376                 ret->timeout=3;
 377
 378         if (ret->peer != NULL)
 379                 {
 380                 X509_free(ret->peer);
 381                 ret->peer=NULL;
 382                 }
 383         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 384
 385         os.length=0;
 386         os.data=NULL;
 387         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 388
 389         if(os.data != NULL)
 390             {
 391             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 392                 {
 393                 ret->sid_ctx_length=os.length;
 394                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
 395                 }
 396             else
 397                 {
 398                 ret->sid_ctx_length=os.length;
 399                 memcpy(ret->sid_ctx,os.data,os.length);
 400                 }
 401             OPENSSL_free(os.data); os.data=NULL; os.length=0;
 402             }
 403         else
 404             ret->sid_ctx_length=0;
 405
 406         ai.length=0;
 407         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
 408         if (ai.data != NULL)
 409                 {
 410                 ret->verify_result=ASN1_INTEGER_get(aip);
 411                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 412                 }
 413         else
 414                 ret->verify_result=X509_V_OK;
 415
 416 #ifndef OPENSSL_NO_TLSEXT
 417         os.length=0;
 418         os.data=NULL;
 419         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6);
 420         if (os.data)
 421                 {
 422                 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length);
 423                 OPENSSL_free(os.data);
 424                 os.data = NULL;
 425                 os.length = 0;
 426                 }
 427         else
 428                 ret->tlsext_hostname=NULL;
 429
 430 #endif /* OPENSSL_NO_TLSEXT */
 431
 432         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 433         }