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 "ssl_locl.h"
  64
  65 typedef struct ssl_session_asn1_st
  66         {
  67         ASN1_INTEGER version;
  68         ASN1_INTEGER ssl_version;
  69         ASN1_OCTET_STRING cipher;
  70         ASN1_OCTET_STRING master_key;
  71         ASN1_OCTET_STRING session_id;
  72         ASN1_OCTET_STRING session_id_context;
  73         ASN1_OCTET_STRING key_arg;
  74         ASN1_INTEGER time;
  75         ASN1_INTEGER timeout;
  76         } SSL_SESSION_ASN1;
  77
  78 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp)
  79         {
  80 #define LSIZE2 (sizeof(long)*2)
  81         int v1=0,v2=0,v3=0,v4=0;
  82         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
  83         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2];
  84         long l;
  85         SSL_SESSION_ASN1 a;
  86         M_ASN1_I2D_vars(in);
  87
  88         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
  89                 return(0);
  90
  91         /* Note that I cheat in the following 2 assignments.  I know
  92          * that if the ASN1_INTERGER passed to ASN1_INTEGER_set
  93          * is > sizeof(long)+1, the buffer will not be re-Malloc()ed.
  94          * This is a bit evil but makes things simple, no dynamic allocation
  95          * to clean up :-) */
  96         a.version.length=LSIZE2;
  97         a.version.type=V_ASN1_INTEGER;
  98         a.version.data=ibuf1;
  99         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
 100
 101         a.ssl_version.length=LSIZE2;
 102         a.ssl_version.type=V_ASN1_INTEGER;
 103         a.ssl_version.data=ibuf2;
 104         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
 105
 106         a.cipher.type=V_ASN1_OCTET_STRING;
 107         a.cipher.data=buf;
 108
 109         if (in->cipher == NULL)
 110                 l=in->cipher_id;
 111         else
 112                 l=in->cipher->id;
 113         if (in->ssl_version == SSL2_VERSION)
 114                 {
 115                 a.cipher.length=3;
 116                 buf[0]=((unsigned char)(l>>16L))&0xff;
 117                 buf[1]=((unsigned char)(l>> 8L))&0xff;
 118                 buf[2]=((unsigned char)(l     ))&0xff;
 119                 }
 120         else
 121                 {
 122                 a.cipher.length=2;
 123                 buf[0]=((unsigned char)(l>>8L))&0xff;
 124                 buf[1]=((unsigned char)(l    ))&0xff;
 125                 }
 126
 127         a.master_key.length=in->master_key_length;
 128         a.master_key.type=V_ASN1_OCTET_STRING;
 129         a.master_key.data=in->master_key;
 130
 131         a.session_id.length=in->session_id_length;
 132         a.session_id.type=V_ASN1_OCTET_STRING;
 133         a.session_id.data=in->session_id;
 134
 135         a.session_id_context.length=in->sid_ctx_length;
 136         a.session_id_context.type=V_ASN1_OCTET_STRING;
 137         a.session_id_context.data=in->sid_ctx;
 138
 139         a.key_arg.length=in->key_arg_length;
 140         a.key_arg.type=V_ASN1_OCTET_STRING;
 141         a.key_arg.data=in->key_arg;
 142
 143         if (in->time != 0L)
 144                 {
 145                 a.time.length=LSIZE2;
 146                 a.time.type=V_ASN1_INTEGER;
 147                 a.time.data=ibuf3;
 148                 ASN1_INTEGER_set(&(a.time),in->time);
 149                 }
 150
 151         if (in->timeout != 0L)
 152                 {
 153                 a.timeout.length=LSIZE2;
 154                 a.timeout.type=V_ASN1_INTEGER;
 155                 a.timeout.data=ibuf4;
 156                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 157                 }
 158
 159         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 160         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 161         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 162         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 163         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 164         if (in->key_arg_length > 0)
 165                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 166         if (in->time != 0L)
 167                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 168         if (in->timeout != 0L)
 169                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 170         if (in->peer != NULL)
 171                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 172         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 173
 174         M_ASN1_I2D_seq_total();
 175
 176         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 177         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 178         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 179         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 180         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 181         if (in->key_arg_length > 0)
 182                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 183         if (in->time != 0L)
 184                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 185         if (in->timeout != 0L)
 186                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 187         if (in->peer != NULL)
 188                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 189         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 190                                v4);
 191
 192         M_ASN1_I2D_finish();
 193         }
 194
 195 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp,
 196              long length)
 197         {
 198         int version,ssl_version=0,i;
 199         long id;
 200         ASN1_INTEGER ai,*aip;
 201         ASN1_OCTET_STRING os,*osp;
 202         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 203
 204         aip= &ai;
 205         osp= &os;
 206
 207         M_ASN1_D2I_Init();
 208         M_ASN1_D2I_start_sequence();
 209
 210         ai.data=NULL; ai.length=0;
 211         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 212         version=(int)ASN1_INTEGER_get(aip);
 213         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
 214
 215         /* we don't care about the version right now :-) */
 216         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 217         ssl_version=(int)ASN1_INTEGER_get(aip);
 218         ret->ssl_version=ssl_version;
 219         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
 220
 221         os.data=NULL; os.length=0;
 222         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 223         if (ssl_version == SSL2_VERSION)
 224                 {
 225                 if (os.length != 3)
 226                         {
 227                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 228                         goto err;
 229                         }
 230                 id=0x02000000L|
 231                         ((unsigned long)os.data[0]<<16L)|
 232                         ((unsigned long)os.data[1]<< 8L)|
 233                          (unsigned long)os.data[2];
 234                 }
 235         else if ((ssl_version>>8) == 3)
 236                 {
 237                 if (os.length != 2)
 238                         {
 239                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 240                         goto err;
 241                         }
 242                 id=0x03000000L|
 243                         ((unsigned long)os.data[0]<<8L)|
 244                          (unsigned long)os.data[1];
 245                 }
 246         else
 247                 {
 248                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 249                 return(NULL);
 250                 }
 251
 252         ret->cipher=NULL;
 253         ret->cipher_id=id;
 254
 255         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 256         if ((ssl_version>>8) == SSL3_VERSION)
 257                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 258         else /* if (ssl_version == SSL2_VERSION) */
 259                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 260
 261         if (os.length > i)
 262                 os.length=i;
 263
 264         ret->session_id_length=os.length;
 265         memcpy(ret->session_id,os.data,os.length);
 266
 267         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 268         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
 269                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 270         else
 271                 ret->master_key_length=os.length;
 272         memcpy(ret->master_key,os.data,ret->master_key_length);
 273
 274         os.length=0;
 275         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 276         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 277                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 278         else
 279                 ret->key_arg_length=os.length;
 280         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 281         if (os.data != NULL) Free(os.data);
 282
 283         ai.length=0;
 284         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 285         if (ai.data != NULL)
 286                 {
 287                 ret->time=ASN1_INTEGER_get(aip);
 288                 Free(ai.data); ai.data=NULL; ai.length=0;
 289                 }
 290         else
 291                 ret->time=time(NULL);
 292
 293         ai.length=0;
 294         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 295         if (ai.data != NULL)
 296                 {
 297                 ret->timeout=ASN1_INTEGER_get(aip);
 298                 Free(ai.data); ai.data=NULL; ai.length=0;
 299                 }
 300         else
 301                 ret->timeout=3;
 302
 303         if (ret->peer != NULL)
 304                 {
 305                 X509_free(ret->peer);
 306                 ret->peer=NULL;
 307                 }
 308         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 309
 310         os.length=0;
 311         os.data=NULL;
 312         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 313
 314         if(os.data != NULL)
 315             {
 316             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 317                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
 318             ret->sid_ctx_length=os.length;
 319             memcpy(ret->sid_ctx,os.data,os.length);
 320             Free(os.data); os.data=NULL; os.length=0;
 321             }
 322         else
 323             ret->sid_ctx_length=0;
 324
 325         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 326         }
 327