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 session_id_context;
  73         ASN1_OCTET_STRING key_arg;
  74         ASN1_INTEGER time;
  75         ASN1_INTEGER timeout;
  76         } SSL_SESSION_ASN1;
  77
  78 /*
  79  * SSLerr(SSL_F_I2D_SSL_SESSION,SSL_R_CIPHER_CODE_WRONG_LENGTH);
  80  * SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNSUPPORTED_CIPHER);
  81  */
  82
  83 int i2d_SSL_SESSION(in,pp)
  84 SSL_SESSION *in;
  85 unsigned char **pp;
  86         {
  87 #define LSIZE2 (sizeof(long)*2)
  88         int v1=0,v2=0,v3=0,v4=0;
  89         unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2];
  90         unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2];
  91         long l;
  92         SSL_SESSION_ASN1 a;
  93         M_ASN1_I2D_vars(in);
  94
  95         if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0)))
  96                 return(0);
  97
  98         /* Note that I cheat in the following 2 assignments.  I know
  99          * that if the ASN1_INTERGER passed to ASN1_INTEGER_set
 100          * is > sizeof(long)+1, the buffer will not be re-Malloc()ed.
 101          * This is a bit evil but makes things simple, no dynamic allocation
 102          * to clean up :-) */
 103         a.version.length=LSIZE2;
 104         a.version.type=V_ASN1_INTEGER;
 105         a.version.data=ibuf1;
 106         ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION);
 107
 108         a.ssl_version.length=LSIZE2;
 109         a.ssl_version.type=V_ASN1_INTEGER;
 110         a.ssl_version.data=ibuf2;
 111         ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version);
 112
 113         a.cipher.type=V_ASN1_OCTET_STRING;
 114         a.cipher.data=buf;
 115
 116         if (in->cipher == NULL)
 117                 l=in->cipher_id;
 118         else
 119                 l=in->cipher->id;
 120         if (in->ssl_version == SSL2_VERSION)
 121                 {
 122                 a.cipher.length=3;
 123                 buf[0]=((unsigned char)(l>>16L))&0xff;
 124                 buf[1]=((unsigned char)(l>> 8L))&0xff;
 125                 buf[2]=((unsigned char)(l     ))&0xff;
 126                 }
 127         else
 128                 {
 129                 a.cipher.length=2;
 130                 buf[0]=((unsigned char)(l>>8L))&0xff;
 131                 buf[1]=((unsigned char)(l    ))&0xff;
 132                 }
 133
 134         a.master_key.length=in->master_key_length;
 135         a.master_key.type=V_ASN1_OCTET_STRING;
 136         a.master_key.data=in->master_key;
 137
 138         a.session_id.length=in->session_id_length;
 139         a.session_id.type=V_ASN1_OCTET_STRING;
 140         a.session_id.data=in->session_id;
 141
 142         a.session_id_context.length=in->sid_ctx_length;
 143         a.session_id_context.type=V_ASN1_OCTET_STRING;
 144         a.session_id_context.data=in->sid_ctx;
 145
 146         a.key_arg.length=in->key_arg_length;
 147         a.key_arg.type=V_ASN1_OCTET_STRING;
 148         a.key_arg.data=in->key_arg;
 149
 150         if (in->time != 0L)
 151                 {
 152                 a.time.length=LSIZE2;
 153                 a.time.type=V_ASN1_INTEGER;
 154                 a.time.data=ibuf3;
 155                 ASN1_INTEGER_set(&(a.time),in->time);
 156                 }
 157
 158         if (in->timeout != 0L)
 159                 {
 160                 a.timeout.length=LSIZE2;
 161                 a.timeout.type=V_ASN1_INTEGER;
 162                 a.timeout.data=ibuf4;
 163                 ASN1_INTEGER_set(&(a.timeout),in->timeout);
 164                 }
 165
 166         M_ASN1_I2D_len(&(a.version),            i2d_ASN1_INTEGER);
 167         M_ASN1_I2D_len(&(a.ssl_version),        i2d_ASN1_INTEGER);
 168         M_ASN1_I2D_len(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 169         M_ASN1_I2D_len(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 170         M_ASN1_I2D_len(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 171         if (in->key_arg_length > 0)
 172                 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING);
 173         if (in->time != 0L)
 174                 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 175         if (in->timeout != 0L)
 176                 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 177         if (in->peer != NULL)
 178                 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3);
 179         M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4);
 180
 181         M_ASN1_I2D_seq_total();
 182
 183         M_ASN1_I2D_put(&(a.version),            i2d_ASN1_INTEGER);
 184         M_ASN1_I2D_put(&(a.ssl_version),        i2d_ASN1_INTEGER);
 185         M_ASN1_I2D_put(&(a.cipher),             i2d_ASN1_OCTET_STRING);
 186         M_ASN1_I2D_put(&(a.session_id),         i2d_ASN1_OCTET_STRING);
 187         M_ASN1_I2D_put(&(a.master_key),         i2d_ASN1_OCTET_STRING);
 188         if (in->key_arg_length > 0)
 189                 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0);
 190         if (in->time != 0L)
 191                 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1);
 192         if (in->timeout != 0L)
 193                 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2);
 194         if (in->peer != NULL)
 195                 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3);
 196         M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,
 197                                v4);
 198
 199         M_ASN1_I2D_finish();
 200         }
 201
 202 SSL_SESSION *d2i_SSL_SESSION(a,pp,length)
 203 SSL_SESSION **a;
 204 unsigned char **pp;
 205 long length;
 206         {
 207         int version,ssl_version=0,i;
 208         long id;
 209         ASN1_INTEGER ai,*aip;
 210         ASN1_OCTET_STRING os,*osp;
 211         M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new);
 212
 213         aip= &ai;
 214         osp= &os;
 215
 216         M_ASN1_D2I_Init();
 217         M_ASN1_D2I_start_sequence();
 218
 219         ai.data=NULL; ai.length=0;
 220         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 221         version=(int)ASN1_INTEGER_get(aip);
 222         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
 223
 224         /* we don't care about the version right now :-) */
 225         M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER);
 226         ssl_version=(int)ASN1_INTEGER_get(aip);
 227         ret->ssl_version=ssl_version;
 228         if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; }
 229
 230         os.data=NULL; os.length=0;
 231         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 232         if (ssl_version == SSL2_VERSION)
 233                 {
 234                 if (os.length != 3)
 235                         {
 236                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 237                         goto err;
 238                         }
 239                 id=0x02000000L|
 240                         ((unsigned long)os.data[0]<<16L)|
 241                         ((unsigned long)os.data[1]<< 8L)|
 242                          (unsigned long)os.data[2];
 243                 }
 244         else if ((ssl_version>>8) == 3)
 245                 {
 246                 if (os.length != 2)
 247                         {
 248                         c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH;
 249                         goto err;
 250                         }
 251                 id=0x03000000L|
 252                         ((unsigned long)os.data[0]<<8L)|
 253                          (unsigned long)os.data[1];
 254                 }
 255         else
 256                 {
 257                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION);
 258                 return(NULL);
 259                 }
 260
 261         ret->cipher=NULL;
 262         ret->cipher_id=id;
 263
 264         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 265         if ((ssl_version>>8) == SSL3_VERSION)
 266                 i=SSL3_MAX_SSL_SESSION_ID_LENGTH;
 267         else /* if (ssl_version == SSL2_VERSION) */
 268                 i=SSL2_MAX_SSL_SESSION_ID_LENGTH;
 269
 270         if (os.length > i)
 271                 os.length=i;
 272
 273         ret->session_id_length=os.length;
 274         memcpy(ret->session_id,os.data,os.length);
 275
 276         M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING);
 277         if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH)
 278                 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;
 279         else
 280                 ret->master_key_length=os.length;
 281         memcpy(ret->master_key,os.data,ret->master_key_length);
 282
 283         os.length=0;
 284         M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING);
 285         if (os.length > SSL_MAX_KEY_ARG_LENGTH)
 286                 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH;
 287         else
 288                 ret->key_arg_length=os.length;
 289         memcpy(ret->key_arg,os.data,ret->key_arg_length);
 290         if (os.data != NULL) Free(os.data);
 291
 292         ai.length=0;
 293         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1);
 294         if (ai.data != NULL)
 295                 {
 296                 ret->time=ASN1_INTEGER_get(aip);
 297                 Free(ai.data); ai.data=NULL; ai.length=0;
 298                 }
 299         else
 300                 ret->time=time(NULL);
 301
 302         ai.length=0;
 303         M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2);
 304         if (ai.data != NULL)
 305                 {
 306                 ret->timeout=ASN1_INTEGER_get(aip);
 307                 Free(ai.data); ai.data=NULL; ai.length=0;
 308                 }
 309         else
 310                 ret->timeout=3;
 311
 312         if (ret->peer != NULL)
 313                 {
 314                 X509_free(ret->peer);
 315                 ret->peer=NULL;
 316                 }
 317         M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3);
 318
 319         os.length=0;
 320         os.data=NULL;
 321         M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4);
 322
 323         if(os.data != NULL)
 324             {
 325             if (os.length > SSL_MAX_SID_CTX_LENGTH)
 326                 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH);
 327             ret->sid_ctx_length=os.length;
 328             memcpy(ret->sid_ctx,os.data,os.length);
 329             Free(os.data); os.data=NULL; os.length=0;
 330             }
 331         else
 332             ret->sid_ctx_length=0;
 333
 334         M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION);
 335         }
 336