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 <openssl/asn1_mac.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/x509.h>
  64 #include "ssl_locl.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         a.krb5_princ.length=in->krb5_client_princ_len;
 150         a.krb5_princ.type=V_ASN1_OCTET_STRING;
 151         a.krb5_princ.data=in->krb5_client_princ;
 152 #endif /* OPENSSL_NO_KRB5 */
 153
 154         if (in->time != 0L)
 155                 {
 156                 a.time.length=LSIZE2;
 157                 a.time.type=V_ASN1_INTEGER;
 158                 a.time.data=ibuf3;
 159                 ASN1_INTEGER_set(&(a.time),in->time);
 160                 }
 161
 162         if (in->timeout != 0L)
 163                 {
 164                 a.timeout.length=LSIZE2;
 165                 a.timeout.type=V_ASN1_INTEGER;
 166                 a.timeout.data=ibuf4;
 167                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 168                 }
 169
 170         if (in->verify_result != X509_V_OK)
 171                 {
 172                 a.verify_result.length=LSIZE2;
 173                 a.verify_result.type=V_ASN1_INTEGER;
 174                 a.verify_result.data=ibuf5;
 175                 ASN1_INTEGER_set(&a.verify_result,in->verify_result);
 176                 }
 177
 178
 179         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 180         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 181         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 182         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 183         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 184 #ifndef OPENSSL_NO_KRB5
 185         M_ASN1_I2D_len(&(a.krb5_princ),         i2d_ASN1_OCTET_STRING);
 186 #endif /* OPENSSL_NO_KRB5 */
 187         if (in->key_arg_length > 0)
 188                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 189         if (in->time != 0L)
 190                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 191         if (in->timeout != 0L)
 192                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 193         if (in->peer != NULL)
 194                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 195         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 196         if (in->verify_result != X509_V_OK)
 197                 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5);
 198
 199         M_ASN1_I2D_seq_total();
 200
 201         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 202         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 203         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 204         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 205         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 206 #ifndef OPENSSL_NO_KRB5
 207         M_ASN1_I2D_put(&(a.krb5_princ),         i2d_ASN1_OCTET_STRING);
 208 #endif /* OPENSSL_NO_KRB5 */
 209         if (in->key_arg_length > 0)
 210                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 211         if (in->time != 0L)
 212                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 213         if (in->timeout != 0L)
 214                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 215         if (in->peer != NULL)
 216                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 217         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 218                                v4);
 219         if (in->verify_result != X509_V_OK)
 220                 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5);
 221         M_ASN1_I2D_finish();
 222         }
 223
 224 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
 225              long length)
 226         {
 227         int version,ssl_version=0,i;
 228         long id;
 229         ASN1_INTEGER ai,*aip;
 230         ASN1_OCTET_STRING os,*osp;
 231         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 232
 233         aip= &ai;
 234         osp= &os;
 235
 236         M_ASN1_D2I_Init();
 237         M_ASN1_D2I_start_sequence();
 238
 239         ai.data=NULL; ai.length=0;
 240         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 241         version=(int)ASN1_INTEGER_get(aip);
 242         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 243
 244         /* we don't care about the version right now :-) */
 245         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 246         ssl_version=(int)ASN1_INTEGER_get(aip);
 247         ret->ssl_version=ssl_version;
 248         if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; }
 249
 250         os.data=NULL; os.length=0;
 251         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 252         if (ssl_version == SSL2_VERSION)
 253                 {
 254                 if (os.length != 3)
 255                         {
 256                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 257                         goto err;
 258                         }
 259                 id=0x02000000L|
 260                         ((unsigned long)os.data[0]<<16L)|
 261                         ((unsigned long)os.data[1]<< 8L)|
 262                          (unsigned long)os.data[2];
 263                 }
 264         else if ((ssl_version>>8) == 3)
 265                 {
 266                 if (os.length != 2)
 267                         {
 268                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 269                         goto err;
 270                         }
 271                 id=0x03000000L|
 272                         ((unsigned long)os.data[0]<<8L)|
 273                          (unsigned long)os.data[1];
 274                 }
 275         else
 276                 {
 277                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 278                 return(NULL);
 279                 }
 280
 281         ret->cipher=NULL;
 282         ret->cipher_id=id;
 283
 284         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 285         if ((ssl_version>>8) == SSL3_VERSION)
 286                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 287         else /* if (ssl_version == SSL2_VERSION) */
 288                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 289
 290         if (os.length > i)
 291                 os.length=i;
 292
 293         ret->session_id_length=os.length;
 294         memcpy(ret->session_id,os.data,os.length);
 295
 296         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 297         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
 298                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 299         else
 300                 ret->master_key_length=os.length;
 301         memcpy(ret->master_key,os.data,ret->master_key_length);
 302
 303         os.length=0;
 304         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 305         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 306                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 307         else
 308                 ret->key_arg_length=os.length;
 309         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 310         if (os.data != NULL) OPENSSL_free(os.data);
 311
 312 #ifndef OPENSSL_NO_KRB5
 313         os.length=0;
 314         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 315         if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH)
 316             ret->krb5_client_princ_len=0;
 317         else
 318             ret->krb5_client_princ_len=os.length;
 319         memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len);
 320         if (os.data != NULL) OPENSSL_free(os.data);
 321 #endif /* OPENSSL_NO_KRB5 */
 322
 323         ai.length=0;
 324         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 325         if (ai.data != NULL)
 326                 {
 327                 ret->time=ASN1_INTEGER_get(aip);
 328                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 329                 }
 330         else
 331                 ret->time=time(NULL);
 332
 333         ai.length=0;
 334         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 335         if (ai.data != NULL)
 336                 {
 337                 ret->timeout=ASN1_INTEGER_get(aip);
 338                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 339                 }
 340         else
 341                 ret->timeout=3;
 342
 343         if (ret->peer != NULL)
 344                 {
 345                 X509_free(ret->peer);
 346                 ret->peer=NULL;
 347                 }
 348         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 349
 350         os.length=0;
 351         os.data=NULL;
 352         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 353
 354         if(os.data != NULL)
 355             {
 356             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 357                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
 358             ret->sid_ctx_length=os.length;
 359             memcpy(ret->sid_ctx,os.data,os.length);
 360             OPENSSL_free(os.data); os.data=NULL; os.length=0;
 361             }
 362         else
 363             ret->sid_ctx_length=0;
 364
 365         ai.length=0;
 366         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5);
 367         if (ai.data != NULL)
 368                 {
 369                 ret->verify_result=ASN1_INTEGER_get(aip);
 370                 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0;
 371                 }
 372         else
 373                 ret->verify_result=X509_V_OK;
 374
 375         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 376         }