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