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 "asn1_mac.h"
  62 #include "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 key_arg;
  73         ASN1_INTEGER time;
  74         ASN1_INTEGER timeout;
  75         } SSL_SESSION_ASN1;
  76
  77 /*
  78  * SSLerr(SSL_F_I2D_SSL_SESSION,SSL_R_CIPHER_CODE_WRONG_LENGTH);
  79  * SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNSUPPORTED_CIPHER);
  80  */
  81
  82 int i2d_SSL_SESSION(in,pp)
  83 SSL_SESSION *in;
  84 unsigned char **pp;
  85         {
  86 #define LSIZE2 (sizeof(long)*2)
  87         int v1=0,v2=0,v3=0;
  88         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
  89         unsigned char ibuf3[LSIZE2],ibuf4[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_INTERGER passed to ASN1_INTEGER_set
  99          * is > sizeof(long)+1, the buffer will not be re-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.key_arg.length=in->key_arg_length;
 142         a.key_arg.type=V_ASN1_OCTET_STRING;
 143         a.key_arg.data=in->key_arg;
 144
 145         if (in->time != 0L)
 146                 {
 147                 a.time.length=LSIZE2;
 148                 a.time.type=V_ASN1_INTEGER;
 149                 a.time.data=ibuf3;
 150                 ASN1_INTEGER_set(&(a.time),in->time);
 151                 }
 152
 153         if (in->timeout != 0L)
 154                 {
 155                 a.timeout.length=LSIZE2;
 156                 a.timeout.type=V_ASN1_INTEGER;
 157                 a.timeout.data=ibuf4;
 158                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 159                 }
 160
 161         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 162         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 163         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 164         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 165         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 166         if (in->key_arg_length > 0)
 167                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 168         if (in->time != 0L)
 169                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 170         if (in->timeout != 0L)
 171                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 172         if (in->peer != NULL)
 173                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 174
 175         M_ASN1_I2D_seq_total();
 176
 177         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 178         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 179         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 180         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 181         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 182         if (in->key_arg_length > 0)
 183                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 184         if (in->time != 0L)
 185                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 186         if (in->timeout != 0L)
 187                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 188         if (in->peer != NULL)
 189                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 190
 191         M_ASN1_I2D_finish();
 192         }
 193
 194 SSL_SESSION *d2i_SSL_SESSION(a,pp,length)
 195 SSL_SESSION **a;
 196 unsigned char **pp;
 197 long length;
 198         {
 199         int version,ssl_version=0,i;
 200         long id;
 201         ASN1_INTEGER ai,*aip;
 202         ASN1_OCTET_STRING os,*osp;
 203         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 204
 205         aip= &ai;
 206         osp= &os;
 207
 208         M_ASN1_D2I_Init();
 209         M_ASN1_D2I_start_sequence();
 210
 211         ai.data=NULL; ai.length=0;
 212         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 213         version=(int)ASN1_INTEGER_get(aip);
 214         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
 215
 216         /* we don't care about the version right now :-) */
 217         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 218         ssl_version=(int)ASN1_INTEGER_get(aip);
 219         ret->ssl_version=ssl_version;
 220         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
 221
 222         os.data=NULL; os.length=0;
 223         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 224         if (ssl_version == SSL2_VERSION)
 225                 {
 226                 if (os.length != 3)
 227                         {
 228                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 229                         goto err;
 230                         }
 231                 id=0x02000000L|
 232                         ((unsigned long)os.data[0]<<16L)|
 233                         ((unsigned long)os.data[1]<< 8L)|
 234                          (unsigned long)os.data[2];
 235                 }
 236         else if ((ssl_version>>8) == 3)
 237                 {
 238                 if (os.length != 2)
 239                         {
 240                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 241                         goto err;
 242                         }
 243                 id=0x03000000L|
 244                         ((unsigned long)os.data[0]<<8L)|
 245                          (unsigned long)os.data[1];
 246                 }
 247         else
 248                 {
 249                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 250                 return(NULL);
 251                 }
 252
 253         ret->cipher=NULL;
 254         ret->cipher_id=id;
 255
 256         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 257         if ((ssl_version>>8) == SSL3_VERSION)
 258                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 259         else /* if (ssl_version == SSL2_VERSION) */
 260                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 261
 262         if (os.length > i)
 263                 os.length=i;
 264
 265         ret->session_id_length=os.length;
 266         memcpy(ret->session_id,os.data,os.length);
 267
 268         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 269         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
 270                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 271         else
 272                 ret->master_key_length=os.length;
 273         memcpy(ret->master_key,os.data,ret->master_key_length);
 274
 275         os.length=0;
 276         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 277         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 278                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 279         else
 280                 ret->key_arg_length=os.length;
 281         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 282         if (os.data != NULL) Free(os.data);
 283
 284         ai.length=0;
 285         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 286         if (ai.data != NULL)
 287                 {
 288                 ret->time=ASN1_INTEGER_get(aip);
 289                 Free(ai.data); ai.data=NULL; ai.length=0;
 290                 }
 291         else
 292                 ret->time=time(NULL);
 293
 294         ai.length=0;
 295         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 296         if (ai.data != NULL)
 297                 {
 298                 ret->timeout=ASN1_INTEGER_get(aip);
 299                 Free(ai.data); ai.data=NULL; ai.length=0;
 300                 }
 301         else
 302                 ret->timeout=3;
 303
 304         if (ret->peer != NULL)
 305                 {
 306                 X509_free(ret->peer);
 307                 ret->peer=NULL;
 308                 }
 309         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 310
 311         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 312         }
 313