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                         M_ASN1_I2D_len(a->d.other,i2d_ASN1_TYPE);
 108                         break;
 109                         }
 110                 }
 111         r=ret;
 112         if (pp == NULL) return(r);
 113         p= *pp;
 114         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 115         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 116
 117         if (a->d.ptr != NULL)
 118                 {
 119                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
 120                 switch (OBJ_obj2nid(a->type))
 121                         {
 122                 case NID_pkcs7_data:
 123                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 124                         break;
 125                 case NID_pkcs7_signed:
 126                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 127                         break;
 128                 case NID_pkcs7_enveloped:
 129                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 130                         break;
 131                 case NID_pkcs7_signedAndEnveloped:
 132                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 133                                 i2d_PKCS7_SIGN_ENVELOPE);
 134                         break;
 135                 case NID_pkcs7_digest:
 136                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 137                         break;
 138                 case NID_pkcs7_encrypted:
 139                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 140                         break;
 141                 default:
 142                         M_ASN1_I2D_put(a->d.other,i2d_ASN1_TYPE);
 143                         break;
 144                         }
 145                 M_ASN1_I2D_INF_seq_end();
 146                 }
 147         M_ASN1_I2D_INF_seq_end();
 148         M_ASN1_I2D_finish();
 149         }
 150
 151 #else
 152
 153 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
 154         {
 155         int explen = 0;
 156         M_ASN1_I2D_vars(a);
 157
 158         if (a->asn1 != NULL)
 159                 {
 160                 if (pp == NULL)
 161                         return((int)a->length);
 162                 memcpy(*pp,a->asn1,(int)a->length);
 163                 *pp+=a->length;
 164                 return((int)a->length);
 165                 }
 166
 167         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
 168         if (a->d.ptr != NULL)
 169                 {
 170                 /* Save current length */
 171                 r = ret;
 172                 switch (OBJ_obj2nid(a->type))
 173                         {
 174                 case NID_pkcs7_data:
 175                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
 176                         break;
 177                 case NID_pkcs7_signed:
 178                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
 179                         break;
 180                 case NID_pkcs7_enveloped:
 181                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 182                         break;
 183                 case NID_pkcs7_signedAndEnveloped:
 184                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
 185                                 i2d_PKCS7_SIGN_ENVELOPE);
 186                         break;
 187                 case NID_pkcs7_digest:
 188                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
 189                         break;
 190                 case NID_pkcs7_encrypted:
 191                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 192                         break;
 193                 default:
 194                         M_ASN1_I2D_len(a->d.other,i2d_ASN1_TYPE);
 195                         break;
 196                         }
 197                 /* Work out explicit tag content size */
 198                 explen = ret - r;
 199                 /* Work out explicit tag size: Note: ASN1_object_size
 200                  * includes the content length.
 201                  */
 202                 ret =  r + ASN1_object_size(1, explen, 0);
 203                 }
 204
 205         M_ASN1_I2D_seq_total();
 206
 207         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 208
 209         if (a->d.ptr != NULL)
 210                 {
 211                 ASN1_put_object(&p, 1, explen, 0, V_ASN1_CONTEXT_SPECIFIC);
 212                 switch (OBJ_obj2nid(a->type))
 213                         {
 214                 case NID_pkcs7_data:
 215                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 216                         break;
 217                 case NID_pkcs7_signed:
 218                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 219                         break;
 220                 case NID_pkcs7_enveloped:
 221                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 222                         break;
 223                 case NID_pkcs7_signedAndEnveloped:
 224                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 225                                 i2d_PKCS7_SIGN_ENVELOPE);
 226                         break;
 227                 case NID_pkcs7_digest:
 228                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 229                         break;
 230                 case NID_pkcs7_encrypted:
 231                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 232                         break;
 233                 default:
 234                         M_ASN1_I2D_put(a->d.other,i2d_ASN1_TYPE);
 235                         break;
 236                         }
 237                 }
 238         M_ASN1_I2D_finish();
 239         }
 240
 241 #endif
 242
 243 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
 244         {
 245         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
 246
 247         if ((a != NULL) && ((*a) != NULL))
 248                 {
 249                 if ((*a)->asn1 != NULL)
 250                         {
 251                         OPENSSL_free((*a)->asn1);
 252                         (*a)->asn1=NULL;
 253                         }
 254                 (*a)->length=0;
 255                 }
 256
 257         M_ASN1_D2I_Init();
 258         M_ASN1_D2I_start_sequence();
 259         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
 260         if (!M_ASN1_D2I_end_sequence())
 261                 {
 262                 int Tinf,Ttag,Tclass;
 263                 long Tlen;
 264
 265                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
 266                         V_ASN1_CONTEXT_SPECIFIC|0))
 267                         {
 268                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
 269                         c.line=__LINE__;
 270                         goto err;
 271                         }
 272
 273                 ret->detached=0;
 274
 275                 c.q=c.p;
 276                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
 277                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
 278                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
 279                 c.slen-=(c.p-c.q);
 280
 281                 switch (OBJ_obj2nid(ret->type))
 282                         {
 283                 case NID_pkcs7_data:
 284                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
 285                         break;
 286                 case NID_pkcs7_signed:
 287                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
 288                         if (ret->d.sign->contents->d.ptr == NULL)
 289                                 ret->detached=1;
 290                         break;
 291                 case NID_pkcs7_enveloped:
 292                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
 293                         break;
 294                 case NID_pkcs7_signedAndEnveloped:
 295                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
 296                                 d2i_PKCS7_SIGN_ENVELOPE);
 297                         break;
 298                 case NID_pkcs7_digest:
 299                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
 300                         break;
 301                 case NID_pkcs7_encrypted:
 302                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
 303                         break;
 304                 default:
 305                         M_ASN1_D2I_get(ret->d.other,d2i_ASN1_TYPE);
 306                         break;
 307                         }
 308                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
 309                         {
 310                         if (!ASN1_check_infinite_end(&c.p,c.slen))
 311                                 {
 312                                 c.error=ERR_R_MISSING_ASN1_EOS;
 313                                 c.line=__LINE__;
 314                                 goto err;
 315                                 }
 316                         }
 317                 }
 318         else
 319                 ret->detached=1;
 320
 321         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
 322         }
 323
 324 PKCS7 *PKCS7_new(void)
 325         {
 326         PKCS7 *ret=NULL;
 327         ASN1_CTX c;
 328
 329         M_ASN1_New_Malloc(ret,PKCS7);
 330         ret->type=OBJ_nid2obj(NID_undef);
 331         ret->asn1=NULL;
 332         ret->length=0;
 333         ret->detached=0;
 334         ret->d.ptr=NULL;
 335         return(ret);
 336         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
 337         }
 338
 339 void PKCS7_free(PKCS7 *a)
 340         {
 341         if (a == NULL) return;
 342
 343         PKCS7_content_free(a);
 344         if (a->type != NULL)
 345                 {
 346                 ASN1_OBJECT_free(a->type);
 347                 }
 348         OPENSSL_free(a);
 349         }
 350
 351 void PKCS7_content_free(PKCS7 *a)
 352         {
 353         if(a == NULL)
 354             return;
 355
 356         if (a->asn1 != NULL) OPENSSL_free(a->asn1);
 357
 358         if (a->d.ptr != NULL)
 359                 {
 360                 if (a->type == NULL) return;
 361
 362                 switch (OBJ_obj2nid(a->type))
 363                         {
 364                 case NID_pkcs7_data:
 365                         M_ASN1_OCTET_STRING_free(a->d.data);
 366                         break;
 367                 case NID_pkcs7_signed:
 368                         PKCS7_SIGNED_free(a->d.sign);
 369                         break;
 370                 case NID_pkcs7_enveloped:
 371                         PKCS7_ENVELOPE_free(a->d.enveloped);
 372                         break;
 373                 case NID_pkcs7_signedAndEnveloped:
 374                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
 375                         break;
 376                 case NID_pkcs7_digest:
 377                         PKCS7_DIGEST_free(a->d.digest);
 378                         break;
 379                 case NID_pkcs7_encrypted:
 380                         PKCS7_ENCRYPT_free(a->d.encrypted);
 381                         break;
 382                 default:
 383                         ASN1_TYPE_free(a->d.other);
 384                         break;
 385                         }
 386                 }
 387         a->d.ptr=NULL;
 388         }
 389
 390 IMPLEMENT_STACK_OF(PKCS7)
 391 IMPLEMENT_ASN1_SET_OF(PKCS7)