crypto/asn1/p7_lib.c

   1 /* crypto/asn1/p7_lib.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 "cryptlib.h"
  61 #include <openssl/asn1_mac.h>
  62 #include <openssl/pkcs7.h>
  63 #include <openssl/objects.h>
  64
  65 #ifdef PKCS7_INDEFINITE_ENCODING
  66
  67 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
  68         {
  69         M_ASN1_I2D_vars(a);
  70
  71         if (a->asn1 != NULL)
  72                 {
  73                 if (pp == NULL)
  74                         return((int)a->length);
  75                 memcpy(*pp,a->asn1,(int)a->length);
  76                 *pp+=a->length;
  77                 return((int)a->length);
  78                 }
  79
  80         ret+=4; /* sequence, BER header plus '0 0' end padding */
  81         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
  82         if (a->d.ptr != NULL)
  83                 {
  84                 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
  85                 switch (OBJ_obj2nid(a->type))
  86                         {
  87                 case NID_pkcs7_data:
  88                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
  89                         break;
  90                 case NID_pkcs7_signed:
  91                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
  92                         break;
  93                 case NID_pkcs7_enveloped:
  94                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
  95                         break;
  96                 case NID_pkcs7_signedAndEnveloped:
  97                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
  98                                 i2d_PKCS7_SIGN_ENVELOPE);
  99                         break;
 100                 case NID_pkcs7_digest:
 101                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
 102                         break;
 103                 case NID_pkcs7_encrypted:
 104                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 105                         break;
 106                 default:
 107                         break;
 108                         }
 109                 }
 110         r=ret;
 111         if (pp == NULL) return(r);
 112         p= *pp;
 113         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 114         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 115
 116         if (a->d.ptr != NULL)
 117                 {
 118                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
 119                 switch (OBJ_obj2nid(a->type))
 120                         {
 121                 case NID_pkcs7_data:
 122                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 123                         break;
 124                 case NID_pkcs7_signed:
 125                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 126                         break;
 127                 case NID_pkcs7_enveloped:
 128                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 129                         break;
 130                 case NID_pkcs7_signedAndEnveloped:
 131                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 132                                 i2d_PKCS7_SIGN_ENVELOPE);
 133                         break;
 134                 case NID_pkcs7_digest:
 135                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 136                         break;
 137                 case NID_pkcs7_encrypted:
 138                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 139                         break;
 140                 default:
 141                         break;
 142                         }
 143                 M_ASN1_I2D_INF_seq_end();
 144                 }
 145         M_ASN1_I2D_INF_seq_end();
 146         M_ASN1_I2D_finish();
 147         }
 148
 149 #else
 150
 151 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
 152         {
 153         int explen = 0;
 154         M_ASN1_I2D_vars(a);
 155
 156         if (a->asn1 != NULL)
 157                 {
 158                 if (pp == NULL)
 159                         return((int)a->length);
 160                 memcpy(*pp,a->asn1,(int)a->length);
 161                 *pp+=a->length;
 162                 return((int)a->length);
 163                 }
 164
 165         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
 166         if (a->d.ptr != NULL)
 167                 {
 168                 /* Save current length */
 169                 r = ret;
 170                 switch (OBJ_obj2nid(a->type))
 171                         {
 172                 case NID_pkcs7_data:
 173                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
 174                         break;
 175                 case NID_pkcs7_signed:
 176                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
 177                         break;
 178                 case NID_pkcs7_enveloped:
 179                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 180                         break;
 181                 case NID_pkcs7_signedAndEnveloped:
 182                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
 183                                 i2d_PKCS7_SIGN_ENVELOPE);
 184                         break;
 185                 case NID_pkcs7_digest:
 186                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
 187                         break;
 188                 case NID_pkcs7_encrypted:
 189                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 190                         break;
 191                 default:
 192                         break;
 193                         }
 194                 /* Work out explicit tag content size */
 195                 explen = ret - r;
 196                 /* Work out explicit tag size: Note: ASN1_object_size
 197                  * includes the content length.
 198                  */
 199                 ret =  r + ASN1_object_size(1, explen, 0);
 200                 }
 201
 202         M_ASN1_I2D_seq_total();
 203
 204         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 205
 206         if (a->d.ptr != NULL)
 207                 {
 208                 ASN1_put_object(&p, 1, explen, 0, V_ASN1_CONTEXT_SPECIFIC);
 209                 switch (OBJ_obj2nid(a->type))
 210                         {
 211                 case NID_pkcs7_data:
 212                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 213                         break;
 214                 case NID_pkcs7_signed:
 215                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 216                         break;
 217                 case NID_pkcs7_enveloped:
 218                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 219                         break;
 220                 case NID_pkcs7_signedAndEnveloped:
 221                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 222                                 i2d_PKCS7_SIGN_ENVELOPE);
 223                         break;
 224                 case NID_pkcs7_digest:
 225                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 226                         break;
 227                 case NID_pkcs7_encrypted:
 228                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 229                         break;
 230                 default:
 231                         break;
 232                         }
 233                 }
 234         M_ASN1_I2D_finish();
 235         }
 236
 237 #endif
 238
 239 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
 240         {
 241         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
 242
 243         if ((a != NULL) && ((*a) != NULL))
 244                 {
 245                 if ((*a)->asn1 != NULL)
 246                         {
 247                         OPENSSL_free((*a)->asn1);
 248                         (*a)->asn1=NULL;
 249                         }
 250                 (*a)->length=0;
 251                 }
 252
 253         M_ASN1_D2I_Init();
 254         M_ASN1_D2I_start_sequence();
 255         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
 256         if (!M_ASN1_D2I_end_sequence())
 257                 {
 258                 int Tinf,Ttag,Tclass;
 259                 long Tlen;
 260
 261                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
 262                         V_ASN1_CONTEXT_SPECIFIC|0))
 263                         {
 264                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
 265                         c.line=__LINE__;
 266                         goto err;
 267                         }
 268
 269                 ret->detached=0;
 270
 271                 c.q=c.p;
 272                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
 273                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
 274                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
 275                 c.slen-=(c.p-c.q);
 276
 277                 switch (OBJ_obj2nid(ret->type))
 278                         {
 279                 case NID_pkcs7_data:
 280                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
 281                         break;
 282                 case NID_pkcs7_signed:
 283                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
 284                         if (ret->d.sign->contents->d.ptr == NULL)
 285                                 ret->detached=1;
 286                         break;
 287                 case NID_pkcs7_enveloped:
 288                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
 289                         break;
 290                 case NID_pkcs7_signedAndEnveloped:
 291                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
 292                                 d2i_PKCS7_SIGN_ENVELOPE);
 293                         break;
 294                 case NID_pkcs7_digest:
 295                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
 296                         break;
 297                 case NID_pkcs7_encrypted:
 298                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
 299                         break;
 300                 default:
 301                         c.error=ASN1_R_BAD_PKCS7_TYPE;
 302                         c.line=__LINE__;
 303                         goto err;
 304                         /* break; */
 305                         }
 306                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
 307                         {
 308                         if (!ASN1_check_infinite_end(&c.p,c.slen))
 309                                 {
 310                                 c.error=ERR_R_MISSING_ASN1_EOS;
 311                                 c.line=__LINE__;
 312                                 goto err;
 313                                 }
 314                         }
 315                 }
 316         else
 317                 ret->detached=1;
 318
 319         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
 320         }
 321
 322 PKCS7 *PKCS7_new(void)
 323         {
 324         PKCS7 *ret=NULL;
 325         ASN1_CTX c;
 326
 327         M_ASN1_New_Malloc(ret,PKCS7);
 328         ret->type=OBJ_nid2obj(NID_undef);
 329         ret->asn1=NULL;
 330         ret->length=0;
 331         ret->detached=0;
 332         ret->d.ptr=NULL;
 333         return(ret);
 334         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
 335         }
 336
 337 void PKCS7_free(PKCS7 *a)
 338         {
 339         if (a == NULL) return;
 340
 341         PKCS7_content_free(a);
 342         if (a->type != NULL)
 343                 {
 344                 ASN1_OBJECT_free(a->type);
 345                 }
 346         OPENSSL_free(a);
 347         }
 348
 349 void PKCS7_content_free(PKCS7 *a)
 350         {
 351         if(a == NULL)
 352             return;
 353
 354         if (a->asn1 != NULL) OPENSSL_free(a->asn1);
 355
 356         if (a->d.ptr != NULL)
 357                 {
 358                 if (a->type == NULL) return;
 359
 360                 switch (OBJ_obj2nid(a->type))
 361                         {
 362                 case NID_pkcs7_data:
 363                         M_ASN1_OCTET_STRING_free(a->d.data);
 364                         break;
 365                 case NID_pkcs7_signed:
 366                         PKCS7_SIGNED_free(a->d.sign);
 367                         break;
 368                 case NID_pkcs7_enveloped:
 369                         PKCS7_ENVELOPE_free(a->d.enveloped);
 370                         break;
 371                 case NID_pkcs7_signedAndEnveloped:
 372                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
 373                         break;
 374                 case NID_pkcs7_digest:
 375                         PKCS7_DIGEST_free(a->d.digest);
 376                         break;
 377                 case NID_pkcs7_encrypted:
 378                         PKCS7_ENCRYPT_free(a->d.encrypted);
 379                         break;
 380                 default:
 381                         /* MEMORY LEAK */
 382                         break;
 383                         }
 384                 }
 385         a->d.ptr=NULL;
 386         }
 387
 388 IMPLEMENT_STACK_OF(PKCS7)
 389 IMPLEMENT_ASN1_SET_OF(PKCS7)