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 #include "cryptlib.h"
  66
  67 typedef struct ssl_session_asn1_st
  68         {
  69         ASN1_INTEGER version;
  70         ASN1_INTEGER ssl_version;
  71         ASN1_OCTET_STRING cipher;
  72         ASN1_OCTET_STRING master_key;
  73         ASN1_OCTET_STRING session_id;
  74         ASN1_OCTET_STRING session_id_context;
  75         ASN1_OCTET_STRING key_arg;
  76 #ifndef OPENSSL_NO_KRB5
  77         ASN1_OCTET_STRING krb5_princ;
  78 #endif /* OPENSSL_NO_KRB5 */
  79         ASN1_INTEGER time;
  80         ASN1_INTEGER timeout;
  81         ASN1_INTEGER verify_result;
  82         } SSL_SESSION_ASN1;
  83
  84 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
  85         {
  86 #define LSIZE2 (sizeof(long)*2)
  87         int v1=0,v2=0,v3=0,v4=0,v5=0;
  88         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
  89         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2];
  90         long l;
  91         SSL_SESSION_ASN1 a;
  92         M_ASN1_I2D_vars(in);
  93
  94         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
  95                 return(0);
  96
  97         /* Note that I cheat in the following 2 assignments.  I know
  98          * that if the ASN1_INTEGER passed to ASN1_INTEGER_set
  99          * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed.
 100          * This is a bit evil but makes things simple, no dynamic allocation
 101          * to clean up :-) */
 102         a.version.length=LSIZE2;
 103         a.version.type=V_ASN1_INTEGER;
 104         a.version.data=ibuf1;
 105         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
 106
 107         a.ssl_version.length=LSIZE2;
 108         a.ssl_version.type=V_ASN1_INTEGER;
 109         a.ssl_version.data=ibuf2;
 110         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
 111
 112         a.cipher.type=V_ASN1_OCTET_STRING;
 113         a.cipher.data=buf;
 114
 115         if (in->cipher == NULL)
 116                 l=in->cipher_id;
 117         else
 118                 l=in->cipher->id;
 119         if (in->ssl_version == SSL2_VERSION)
 120                 {
 121                 a.cipher.length=3;
 122                 buf[0]=((unsigned char)(l>>16L))&0xff;
 123                 buf[1]=((unsigned char)(l>> 8L))&0xff;
 124                 buf[2]=((unsigned char)(l     ))&0xff;
 125                 }
 126         else
 127                 {
 128                 a.cipher.length=2;
 129                 buf[0]=((unsigned char)(l>>8L))&0xff;
 130                 buf[1]=((unsigned char)(l    ))&0xff;
 131                 }
 132
 133         a.master_key.length=in->master_key_length;
 134         a.master_key.type=V_ASN1_OCTET_STRING;
 135         a.master_key.data=in->master_key;
 136
 137         a.session_id.length=in->session_id_length;
 138         a.session_id.type=V_ASN1_OCTET_STRING;
 139         a.session_id.data=in->session_id;
 140
 141         a.session_id_context.length=in->sid_ctx_length;
 142         a.session_id_context.type=V_ASN1_OCTET_STRING;
 143         a.session_id_context.data=in->sid_ctx;
 144
 145         a.key_arg.length=in->key_arg_length;
 146         a.key_arg.type=V_ASN1_OCTET_STRING;
 147         a.key_arg.data=in->key_arg;
 148
 149 #ifndef OPENSSL_NO_KRB5
 150         if (in->krb5_client_princ_len)
 151                 {
 152                 a.krb5_princ.length=in->krb5_client_princ_len;
 153                 a.krb5_princ.type=V_ASN1_OCTET_STRING;
 154                 a.krb5_princ.data=in->krb5_client_princ;
 155                 }
 156 #endif /* OPENSSL_NO_KRB5 */
 157
 158         if (in->time != 0L)
 159                 {
 160                 a.time.length=LSIZE2;
 161                 a.time.type=V_ASN1_INTEGER;
 162                 a.time.data=ibuf3;
 163                 ASN1_INTEGER_set(&(a.time),in->time);
 164                 }
 165
 166         if (in->timeout != 0L)
 167                 {
 168                 a.timeout.length=LSIZE2;
 169                 a.timeout.type=V_ASN1_INTEGER;
 170                 a.timeout.data=ibuf4;
 171                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 172                 }
 173
 174         if (in->verify_result != X509_V_OK)
 175                 {
 176                 a.verify_result.length=LSIZE2;
 177                 a.verify_result.type=V_ASN1_INTEGER;
 178                 a.verify_result.data=ibuf5;
 179                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
 180                 }
 181
 182
 183         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 184         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 185         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 186         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 187         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 188 #ifndef OPENSSL_NO_KRB5
 189         if (in->krb5_client_princ_len)
 190                 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 191 #endif /* OPENSSL_NO_KRB5 */
 192         if (in->key_arg_length > 0)
 193                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 194         if (in->time != 0L)
 195                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 196         if (in->timeout != 0L)
 197                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 198         if (in->peer != NULL)
 199                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 200         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 201         if (in->verify_result != X509_V_OK)
 202                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
 203
 204         M_ASN1_I2D_seq_total();
 205
 206         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 207         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 208         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 209         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 210         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 211 #ifndef OPENSSL_NO_KRB5
 212         if (in->krb5_client_princ_len)
 213                 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING);
 214 #endif /* OPENSSL_NO_KRB5 */
 215         if (in->key_arg_length > 0)
 216                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 217         if (in->time != 0L)
 218                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 219         if (in->timeout != 0L)
 220                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 221         if (in->peer != NULL)
 222                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 223         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 224                                v4);
 225         if (in->verify_result != X509_V_OK)
 226                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
 227         M_ASN1_I2D_finish();
 228         }
 229
 230 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
 231              long length)
 232         {
 233         int version,ssl_version=0,i;
 234         long id;
 235         ASN1_INTEGER ai,*aip;
 236         ASN1_OCTET_STRING os,*osp;
 237         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 238
 239         aip= &ai;
 240         osp= &os;
 241
 242         M_ASN1_D2I_Init();
 243         M_ASN1_D2I_start_sequence();
 244
 245         ai.data=NULL; ai.length=0;
 246         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 247         version=(int)ASN1_INTEGER_get(aip);
 248         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 249
 250         /* we don't care about the version right now :-) */
 251         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 252         ssl_version=(int)ASN1_INTEGER_get(aip);
 253         ret->ssl_version=ssl_version;
 254         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 255
 256         os.data=NULL; os.length=0;
 257         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 258         if (ssl_version == SSL2_VERSION)
 259                 {
 260                 if (os.length != 3)
 261                         {
 262                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 263                         goto err;
 264                         }
 265                 id=0x02000000L|
 266                         ((unsigned long)os.data[0]<<16L)|
 267                         ((unsigned long)os.data[1]<< 8L)|
 268                          (unsigned long)os.data[2];
 269                 }
 270         else if ((ssl_version>>8) == 3)
 271                 {
 272                 if (os.length != 2)
 273                         {
 274                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 275                         goto err;
 276                         }
 277                 id=0x03000000L|
 278                         ((unsigned long)os.data[0]<<8L)|
 279                          (unsigned long)os.data[1];
 280                 }
 281         else
 282                 {
 283                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 284                 return(NULL);
 285                 }
 286
 287         ret->cipher=NULL;
 288         ret->cipher_id=id;
 289
 290         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 291         if ((ssl_version>>8) == SSL3_VERSION)
 292                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 293         else /* if (ssl_version == SSL2_VERSION) */
 294                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 295
 296         if (os.length > i)
 297                 os.length = i;
 298         if (os.length > sizeof ret->session_id) /* can't happen */
 299                 os.length = sizeof ret->session_id;
 300
 301         ret->session_id_length=os.length;
 302         OPENSSL_assert(os.length <= sizeof ret->session_id);
 303         memcpy(ret->session_id,os.data,os.length);
 304
 305         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 306         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
 307                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 308         else
 309                 ret->master_key_length=os.length;
 310         memcpy(ret->master_key,os.data,ret->master_key_length);
 311
 312         os.length=0;
 313
 314 #ifndef OPENSSL_NO_KRB5
 315         os.length=0;
 316         M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING);
 317         if (os.data)
 318                 {
 319                 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
 320                         ret->krb5_client_princ_len=0;
 321                 else
 322                         ret->krb5_client_princ_len=os.length;
 323                 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
 324                 OPENSSL_free(os.data);
 325                 os.data = NULL;
 326                 os.length = 0;
 327                 }
 328         else
 329                 ret->krb5_client_princ_len=0;
 330 #endif /* OPENSSL_NO_KRB5 */
 331
 332         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 333         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 334                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 335         else
 336                 ret->key_arg_length=os.length;
 337         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 338         if (os.data != NULL) OPENSSL_free(os.data);
 339
 340         ai.length=0;
 341         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 342         if (ai.data != NULL)
 343                 {
 344                 ret->time=ASN1_INTEGER_get(aip);
 345                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 346                 }
 347         else
 348                 ret->time=time(NULL);
 349
 350         ai.length=0;
 351         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 352         if (ai.data != NULL)
 353                 {
 354                 ret->timeout=ASN1_INTEGER_get(aip);
 355                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 356                 }
 357         else
 358                 ret->timeout=3;
 359
 360         if (ret->peer != NULL)
 361                 {
 362                 X509_free(ret->peer);
 363                 ret->peer=NULL;
 364                 }
 365         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 366
 367         os.length=0;
 368         os.data=NULL;
 369         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 370
 371         if(os.data != NULL)
 372             {
 373             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 374                 {
 375                 ret->sid_ctx_length=os.length;
 376                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
 377                 }
 378             else
 379                 {
 380                 ret->sid_ctx_length=os.length;
 381                 memcpy(ret->sid_ctx,os.data,os.length);
 382                 }
 383             OPENSSL_free(os.data); os.data=NULL; os.length=0;
 384             }
 385         else
 386             ret->sid_ctx_length=0;
 387
 388         ai.length=0;
 389         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
 390         if (ai.data != NULL)
 391                 {
 392                 ret->verify_result=ASN1_INTEGER_get(aip);
 393                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 394                 }
 395         else
 396                 ret->verify_result=X509_V_OK;
 397
 398         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 399         }