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 "asn1_mac.h"
  62 #include "objects.h"
  63
  64 /* ASN1err(ASN1_F_D2I_PKCS7,ASN1_R_BAD_PKCS7_CONTENT);
  65  * ASN1err(ASN1_F_I2D_PKCS7,ASN1_R_BAD_PKCS7_TYPE);
  66  * ASN1err(ASN1_F_PKCS7_NEW,ASN1_R_BAD_PKCS7_TYPE);
  67  */
  68
  69 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
  70         {
  71         M_ASN1_I2D_vars(a);
  72
  73         if (a->asn1 != NULL)
  74                 {
  75                 if (pp == NULL)
  76                         return((int)a->length);
  77                 memcpy(*pp,a->asn1,(int)a->length);
  78                 *pp+=a->length;
  79                 return((int)a->length);
  80                 }
  81
  82         ret+=4; /* sequence, BER header plus '0 0' end padding */
  83         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
  84         if (a->d.ptr != NULL)
  85                 {
  86                 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
  87                 switch (OBJ_obj2nid(a->type))
  88                         {
  89                 case NID_pkcs7_data:
  90                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
  91                         break;
  92                 case NID_pkcs7_signed:
  93                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
  94                         break;
  95                 case NID_pkcs7_enveloped:
  96                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
  97                         break;
  98                 case NID_pkcs7_signedAndEnveloped:
  99                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
 100                                 i2d_PKCS7_SIGN_ENVELOPE);
 101                         break;
 102                 case NID_pkcs7_digest:
 103                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
 104                         break;
 105                 case NID_pkcs7_encrypted:
 106                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 107                         break;
 108                 default:
 109                         break;
 110                         }
 111                 }
 112         r=ret;
 113         if (pp == NULL) return(r);
 114         p= *pp;
 115         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 116         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
 117
 118         if (a->d.ptr != NULL)
 119                 {
 120                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
 121                 switch (OBJ_obj2nid(a->type))
 122                         {
 123                 case NID_pkcs7_data:
 124                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
 125                         break;
 126                 case NID_pkcs7_signed:
 127                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
 128                         break;
 129                 case NID_pkcs7_enveloped:
 130                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
 131                         break;
 132                 case NID_pkcs7_signedAndEnveloped:
 133                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
 134                                 i2d_PKCS7_SIGN_ENVELOPE);
 135                         break;
 136                 case NID_pkcs7_digest:
 137                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
 138                         break;
 139                 case NID_pkcs7_encrypted:
 140                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
 141                         break;
 142                 default:
 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 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
 152         {
 153         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
 154
 155         if ((a != NULL) && ((*a) != NULL))
 156                 {
 157                 if ((*a)->asn1 != NULL)
 158                         {
 159                         Free((char *)(*a)->asn1);
 160                         (*a)->asn1=NULL;
 161                         }
 162                 (*a)->length=0;
 163                 }
 164
 165         M_ASN1_D2I_Init();
 166         M_ASN1_D2I_start_sequence();
 167         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
 168         if (!M_ASN1_D2I_end_sequence())
 169                 {
 170                 int Tinf,Ttag,Tclass;
 171                 long Tlen;
 172
 173                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
 174                         V_ASN1_CONTEXT_SPECIFIC|0))
 175                         {
 176                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
 177                         c.line=__LINE__;
 178                         goto err;
 179                         }
 180
 181                 ret->detached=0;
 182
 183                 c.q=c.p;
 184                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
 185                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
 186                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
 187                 c.slen-=(c.p-c.q);
 188
 189                 switch (OBJ_obj2nid(ret->type))
 190                         {
 191                 case NID_pkcs7_data:
 192                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
 193                         break;
 194                 case NID_pkcs7_signed:
 195                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
 196                         if (ret->d.sign->contents->d.ptr == NULL)
 197                                 ret->detached=1;
 198                         break;
 199                 case NID_pkcs7_enveloped:
 200                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
 201                         break;
 202                 case NID_pkcs7_signedAndEnveloped:
 203                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
 204                                 d2i_PKCS7_SIGN_ENVELOPE);
 205                         break;
 206                 case NID_pkcs7_digest:
 207                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
 208                         break;
 209                 case NID_pkcs7_encrypted:
 210                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
 211                         break;
 212                 default:
 213                         c.error=ASN1_R_BAD_PKCS7_TYPE;
 214                         c.line=__LINE__;
 215                         goto err;
 216                         /* break; */
 217                         }
 218                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
 219                         {
 220                         if (!ASN1_check_infinite_end(&c.p,c.slen))
 221                                 {
 222                                 c.error=ERR_R_MISSING_ASN1_EOS;
 223                                 c.line=__LINE__;
 224                                 goto err;
 225                                 }
 226                         }
 227                 }
 228         else
 229                 ret->detached=1;
 230
 231         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
 232         }
 233
 234 PKCS7 *PKCS7_new(void)
 235         {
 236         PKCS7 *ret=NULL;
 237         ASN1_CTX c;
 238
 239         M_ASN1_New_Malloc(ret,PKCS7);
 240         ret->type=OBJ_nid2obj(NID_undef);
 241         ret->asn1=NULL;
 242         ret->length=0;
 243         ret->detached=0;
 244         ret->d.ptr=NULL;
 245         return(ret);
 246         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
 247         }
 248
 249 void PKCS7_free(PKCS7 *a)
 250         {
 251         if (a == NULL) return;
 252
 253         PKCS7_content_free(a);
 254         if (a->type != NULL)
 255                 {
 256                 ASN1_OBJECT_free(a->type);
 257                 }
 258         Free((char *)(char *)a);
 259         }
 260
 261 void PKCS7_content_free(PKCS7 *a)
 262         {
 263         if(a == NULL)
 264             return;
 265
 266         if (a->asn1 != NULL) Free((char *)a->asn1);
 267
 268         if (a->d.ptr != NULL)
 269                 {
 270                 if (a->type == NULL) return;
 271
 272                 switch (OBJ_obj2nid(a->type))
 273                         {
 274                 case NID_pkcs7_data:
 275                         ASN1_OCTET_STRING_free(a->d.data);
 276                         break;
 277                 case NID_pkcs7_signed:
 278                         PKCS7_SIGNED_free(a->d.sign);
 279                         break;
 280                 case NID_pkcs7_enveloped:
 281                         PKCS7_ENVELOPE_free(a->d.enveloped);
 282                         break;
 283                 case NID_pkcs7_signedAndEnveloped:
 284                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
 285                         break;
 286                 case NID_pkcs7_digest:
 287                         PKCS7_DIGEST_free(a->d.digest);
 288                         break;
 289                 case NID_pkcs7_encrypted:
 290                         PKCS7_ENCRYPT_free(a->d.encrypted);
 291                         break;
 292                 default:
 293                         /* MEMORY LEAK */
 294                         break;
 295                         }
 296                 }
 297         a->d.ptr=NULL;
 298         }
 299