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/objects.h>
  63
  64 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
  65         {
  66         M_ASN1_I2D_vars(a);
  67
  68         if (a->asn1 != NULL)
  69                 {
  70                 if (pp == NULL)
  71                         return((int)a->length);
  72                 memcpy(*pp,a->asn1,(int)a->length);
  73                 *pp+=a->length;
  74                 return((int)a->length);
  75                 }
  76
  77         ret+=4; /* sequence, BER header plus '0 0' end padding */
  78         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
  79         if (a->d.ptr != NULL)
  80                 {
  81                 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
  82                 switch (OBJ_obj2nid(a->type))
  83                         {
  84                 case NID_pkcs7_data:
  85                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
  86                         break;
  87                 case NID_pkcs7_signed:
  88                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
  89                         break;
  90                 case NID_pkcs7_enveloped:
  91                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
  92                         break;
  93                 case NID_pkcs7_signedAndEnveloped:
  94                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
  95                                 i2d_PKCS7_SIGN_ENVELOPE);
  96                         break;
  97                 case NID_pkcs7_digest:
  98                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
  99                         break;
 100                 case NID_pkcs7_encrypted:
 101                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 102                         break;
 103                 default:
 104                         break;
 105                         }
 106                 }
 107         r=ret;
 108         if (pp == NULL) return(r);
 109         p= *pp;
 110         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 111         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 112
 113         if (a->d.ptr != NULL)
 114                 {
 115                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
 116                 switch (OBJ_obj2nid(a->type))
 117                         {
 118                 case NID_pkcs7_data:
 119                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 120                         break;
 121                 case NID_pkcs7_signed:
 122                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 123                         break;
 124                 case NID_pkcs7_enveloped:
 125                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 126                         break;
 127                 case NID_pkcs7_signedAndEnveloped:
 128                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 129                                 i2d_PKCS7_SIGN_ENVELOPE);
 130                         break;
 131                 case NID_pkcs7_digest:
 132                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 133                         break;
 134                 case NID_pkcs7_encrypted:
 135                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 136                         break;
 137                 default:
 138                         break;
 139                         }
 140                 M_ASN1_I2D_INF_seq_end();
 141                 }
 142         M_ASN1_I2D_INF_seq_end();
 143         M_ASN1_I2D_finish();
 144         }
 145
 146 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
 147         {
 148         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
 149
 150         if ((a != NULL) && ((*a) != NULL))
 151                 {
 152                 if ((*a)->asn1 != NULL)
 153                         {
 154                         Free((char *)(*a)->asn1);
 155                         (*a)->asn1=NULL;
 156                         }
 157                 (*a)->length=0;
 158                 }
 159
 160         M_ASN1_D2I_Init();
 161         M_ASN1_D2I_start_sequence();
 162         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
 163         if (!M_ASN1_D2I_end_sequence())
 164                 {
 165                 int Tinf,Ttag,Tclass;
 166                 long Tlen;
 167
 168                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
 169                         V_ASN1_CONTEXT_SPECIFIC|0))
 170                         {
 171                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
 172                         c.line=__LINE__;
 173                         goto err;
 174                         }
 175
 176                 ret->detached=0;
 177
 178                 c.q=c.p;
 179                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
 180                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
 181                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
 182                 c.slen-=(c.p-c.q);
 183
 184                 switch (OBJ_obj2nid(ret->type))
 185                         {
 186                 case NID_pkcs7_data:
 187                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
 188                         break;
 189                 case NID_pkcs7_signed:
 190                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
 191                         if (ret->d.sign->contents->d.ptr == NULL)
 192                                 ret->detached=1;
 193                         break;
 194                 case NID_pkcs7_enveloped:
 195                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
 196                         break;
 197                 case NID_pkcs7_signedAndEnveloped:
 198                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
 199                                 d2i_PKCS7_SIGN_ENVELOPE);
 200                         break;
 201                 case NID_pkcs7_digest:
 202                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
 203                         break;
 204                 case NID_pkcs7_encrypted:
 205                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
 206                         break;
 207                 default:
 208                         c.error=ASN1_R_BAD_PKCS7_TYPE;
 209                         c.line=__LINE__;
 210                         goto err;
 211                         /* break; */
 212                         }
 213                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
 214                         {
 215                         if (!ASN1_check_infinite_end(&c.p,c.slen))
 216                                 {
 217                                 c.error=ERR_R_MISSING_ASN1_EOS;
 218                                 c.line=__LINE__;
 219                                 goto err;
 220                                 }
 221                         }
 222                 }
 223         else
 224                 ret->detached=1;
 225
 226         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
 227         }
 228
 229 PKCS7 *PKCS7_new(void)
 230         {
 231         PKCS7 *ret=NULL;
 232         ASN1_CTX c;
 233
 234         M_ASN1_New_Malloc(ret,PKCS7);
 235         ret->type=OBJ_nid2obj(NID_undef);
 236         ret->asn1=NULL;
 237         ret->length=0;
 238         ret->detached=0;
 239         ret->d.ptr=NULL;
 240         return(ret);
 241         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
 242         }
 243
 244 void PKCS7_free(PKCS7 *a)
 245         {
 246         if (a == NULL) return;
 247
 248         PKCS7_content_free(a);
 249         if (a->type != NULL)
 250                 {
 251                 ASN1_OBJECT_free(a->type);
 252                 }
 253         Free((char *)(char *)a);
 254         }
 255
 256 void PKCS7_content_free(PKCS7 *a)
 257         {
 258         if(a == NULL)
 259             return;
 260
 261         if (a->asn1 != NULL) Free((char *)a->asn1);
 262
 263         if (a->d.ptr != NULL)
 264                 {
 265                 if (a->type == NULL) return;
 266
 267                 switch (OBJ_obj2nid(a->type))
 268                         {
 269                 case NID_pkcs7_data:
 270                         ASN1_OCTET_STRING_free(a->d.data);
 271                         break;
 272                 case NID_pkcs7_signed:
 273                         PKCS7_SIGNED_free(a->d.sign);
 274                         break;
 275                 case NID_pkcs7_enveloped:
 276                         PKCS7_ENVELOPE_free(a->d.enveloped);
 277                         break;
 278                 case NID_pkcs7_signedAndEnveloped:
 279                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
 280                         break;
 281                 case NID_pkcs7_digest:
 282                         PKCS7_DIGEST_free(a->d.digest);
 283                         break;
 284                 case NID_pkcs7_encrypted:
 285                         PKCS7_ENCRYPT_free(a->d.encrypted);
 286                         break;
 287                 default:
 288                         /* MEMORY LEAK */
 289                         break;
 290                         }
 291                 }
 292         a->d.ptr=NULL;
 293         }
 294