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 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
  66         {
  67         M_ASN1_I2D_vars(a);
  68
  69         if (a->asn1 != NULL)
  70                 {
  71                 if (pp == NULL)
  72                         return((int)a->length);
  73                 memcpy(*pp,a->asn1,(int)a->length);
  74                 *pp+=a->length;
  75                 return((int)a->length);
  76                 }
  77
  78         ret+=4; /* sequence, BER header plus '0 0' end padding */
  79         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
  80         if (a->d.ptr != NULL)
  81                 {
  82                 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
  83                 switch (OBJ_obj2nid(a->type))
  84                         {
  85                 case NID_pkcs7_data:
  86                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
  87                         break;
  88                 case NID_pkcs7_signed:
  89                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
  90                         break;
  91                 case NID_pkcs7_enveloped:
  92                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
  93                         break;
  94                 case NID_pkcs7_signedAndEnveloped:
  95                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
  96                                 i2d_PKCS7_SIGN_ENVELOPE);
  97                         break;
  98                 case NID_pkcs7_digest:
  99                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
 100                         break;
 101                 case NID_pkcs7_encrypted:
 102                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 103                         break;
 104                 default:
 105                         break;
 106                         }
 107                 }
 108         r=ret;
 109         if (pp == NULL) return(r);
 110         p= *pp;
 111         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 112         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 113
 114         if (a->d.ptr != NULL)
 115                 {
 116                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
 117                 switch (OBJ_obj2nid(a->type))
 118                         {
 119                 case NID_pkcs7_data:
 120                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 121                         break;
 122                 case NID_pkcs7_signed:
 123                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 124                         break;
 125                 case NID_pkcs7_enveloped:
 126                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 127                         break;
 128                 case NID_pkcs7_signedAndEnveloped:
 129                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 130                                 i2d_PKCS7_SIGN_ENVELOPE);
 131                         break;
 132                 case NID_pkcs7_digest:
 133                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 134                         break;
 135                 case NID_pkcs7_encrypted:
 136                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 137                         break;
 138                 default:
 139                         break;
 140                         }
 141                 M_ASN1_I2D_INF_seq_end();
 142                 }
 143         M_ASN1_I2D_INF_seq_end();
 144         M_ASN1_I2D_finish();
 145         }
 146
 147 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
 148         {
 149         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
 150
 151         if ((a != NULL) && ((*a) != NULL))
 152                 {
 153                 if ((*a)->asn1 != NULL)
 154                         {
 155                         Free((*a)->asn1);
 156                         (*a)->asn1=NULL;
 157                         }
 158                 (*a)->length=0;
 159                 }
 160
 161         M_ASN1_D2I_Init();
 162         M_ASN1_D2I_start_sequence();
 163         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
 164         if (!M_ASN1_D2I_end_sequence())
 165                 {
 166                 int Tinf,Ttag,Tclass;
 167                 long Tlen;
 168
 169                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
 170                         V_ASN1_CONTEXT_SPECIFIC|0))
 171                         {
 172                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
 173                         c.line=__LINE__;
 174                         goto err;
 175                         }
 176
 177                 ret->detached=0;
 178
 179                 c.q=c.p;
 180                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
 181                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
 182                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
 183                 c.slen-=(c.p-c.q);
 184
 185                 switch (OBJ_obj2nid(ret->type))
 186                         {
 187                 case NID_pkcs7_data:
 188                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
 189                         break;
 190                 case NID_pkcs7_signed:
 191                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
 192                         if (ret->d.sign->contents->d.ptr == NULL)
 193                                 ret->detached=1;
 194                         break;
 195                 case NID_pkcs7_enveloped:
 196                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
 197                         break;
 198                 case NID_pkcs7_signedAndEnveloped:
 199                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
 200                                 d2i_PKCS7_SIGN_ENVELOPE);
 201                         break;
 202                 case NID_pkcs7_digest:
 203                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
 204                         break;
 205                 case NID_pkcs7_encrypted:
 206                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
 207                         break;
 208                 default:
 209                         c.error=ASN1_R_BAD_PKCS7_TYPE;
 210                         c.line=__LINE__;
 211                         goto err;
 212                         /* break; */
 213                         }
 214                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
 215                         {
 216                         if (!ASN1_check_infinite_end(&c.p,c.slen))
 217                                 {
 218                                 c.error=ERR_R_MISSING_ASN1_EOS;
 219                                 c.line=__LINE__;
 220                                 goto err;
 221                                 }
 222                         }
 223                 }
 224         else
 225                 ret->detached=1;
 226
 227         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
 228         }
 229
 230 PKCS7 *PKCS7_new(void)
 231         {
 232         PKCS7 *ret=NULL;
 233         ASN1_CTX c;
 234
 235         M_ASN1_New_Malloc(ret,PKCS7);
 236         ret->type=OBJ_nid2obj(NID_undef);
 237         ret->asn1=NULL;
 238         ret->length=0;
 239         ret->detached=0;
 240         ret->d.ptr=NULL;
 241         return(ret);
 242         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
 243         }
 244
 245 void PKCS7_free(PKCS7 *a)
 246         {
 247         if (a == NULL) return;
 248
 249         PKCS7_content_free(a);
 250         if (a->type != NULL)
 251                 {
 252                 ASN1_OBJECT_free(a->type);
 253                 }
 254         Free(a);
 255         }
 256
 257 void PKCS7_content_free(PKCS7 *a)
 258         {
 259         if(a == NULL)
 260             return;
 261
 262         if (a->asn1 != NULL) Free(a->asn1);
 263
 264         if (a->d.ptr != NULL)
 265                 {
 266                 if (a->type == NULL) return;
 267
 268                 switch (OBJ_obj2nid(a->type))
 269                         {
 270                 case NID_pkcs7_data:
 271                         M_ASN1_OCTET_STRING_free(a->d.data);
 272                         break;
 273                 case NID_pkcs7_signed:
 274                         PKCS7_SIGNED_free(a->d.sign);
 275                         break;
 276                 case NID_pkcs7_enveloped:
 277                         PKCS7_ENVELOPE_free(a->d.enveloped);
 278                         break;
 279                 case NID_pkcs7_signedAndEnveloped:
 280                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
 281                         break;
 282                 case NID_pkcs7_digest:
 283                         PKCS7_DIGEST_free(a->d.digest);
 284                         break;
 285                 case NID_pkcs7_encrypted:
 286                         PKCS7_ENCRYPT_free(a->d.encrypted);
 287                         break;
 288                 default:
 289                         /* MEMORY LEAK */
 290                         break;
 291                         }
 292                 }
 293         a->d.ptr=NULL;
 294         }
 295