crypto/asn1/a_set.c

   1 /* crypto/asn1/a_set.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
  63 #ifndef NO_ASN1_OLD
  64
  65 typedef struct
  66     {
  67     unsigned char *pbData;
  68     int cbData;
  69     } MYBLOB;
  70
  71 /* SetBlobCmp
  72  * This function compares two elements of SET_OF block
  73  */
  74 static int SetBlobCmp(const void *elem1, const void *elem2 )
  75     {
  76     const MYBLOB *b1 = (const MYBLOB *)elem1;
  77     const MYBLOB *b2 = (const MYBLOB *)elem2;
  78     int r;
  79
  80     r = memcmp(b1->pbData, b2->pbData,
  81                b1->cbData < b2->cbData ? b1->cbData : b2->cbData);
  82     if(r != 0)
  83         return r;
  84     return b1->cbData-b2->cbData;
  85     }
  86
  87 /* int is_set:  if TRUE, then sort the contents (i.e. it isn't a SEQUENCE)    */
  88 int i2d_ASN1_SET(STACK_OF(BLOCK) *a, unsigned char **pp,
  89                  i2d_of_void *i2d, int ex_tag, int ex_class,
  90                  int is_set)
  91         {
  92         int ret=0,r;
  93         int i;
  94         unsigned char *p;
  95         unsigned char *pStart, *pTempMem;
  96         MYBLOB *rgSetBlob;
  97         int totSize;
  98
  99         if (a == NULL) return(0);
 100         for (i=sk_BLOCK_num(a)-1; i>=0; i--)
 101                 ret+=i2d(sk_BLOCK_value(a,i),NULL);
 102         r=ASN1_object_size(1,ret,ex_tag);
 103         if (pp == NULL) return(r);
 104
 105         p= *pp;
 106         ASN1_put_object(&p,1,ret,ex_tag,ex_class);
 107
 108 /* Modified by gp@nsj.co.jp */
 109         /* And then again by Ben */
 110         /* And again by Steve */
 111
 112         if(!is_set || (sk_BLOCK_num(a) < 2))
 113                 {
 114                 for (i=0; i<sk_BLOCK_num(a); i++)
 115                         i2d(sk_BLOCK_value(a,i),&p);
 116
 117                 *pp=p;
 118                 return(r);
 119                 }
 120
 121         pStart  = p; /* Catch the beg of Setblobs*/
 122                 /* In this array we will store the SET blobs */
 123                 rgSetBlob = OPENSSL_malloc(sk_BLOCK_num(a) * sizeof(MYBLOB));
 124                 if (rgSetBlob == NULL)
 125                         {
 126                         ASN1err(ASN1_F_I2D_ASN1_SET,ERR_R_MALLOC_FAILURE);
 127                         return(0);
 128                         }
 129
 130         for (i=0; i<sk_BLOCK_num(a); i++)
 131                 {
 132                 rgSetBlob[i].pbData = p;  /* catch each set encode blob */
 133                 i2d(sk_BLOCK_value(a,i),&p);
 134                 rgSetBlob[i].cbData = p - rgSetBlob[i].pbData; /* Length of this
 135 SetBlob
 136 */
 137                 }
 138         *pp=p;
 139         totSize = p - pStart; /* This is the total size of all set blobs */
 140
 141  /* Now we have to sort the blobs. I am using a simple algo.
 142     *Sort ptrs *Copy to temp-mem *Copy from temp-mem to user-mem*/
 143         qsort( rgSetBlob, sk_BLOCK_num(a), sizeof(MYBLOB), SetBlobCmp);
 144                 if (!(pTempMem = OPENSSL_malloc(totSize)))
 145                         {
 146                         ASN1err(ASN1_F_I2D_ASN1_SET,ERR_R_MALLOC_FAILURE);
 147                         return(0);
 148                         }
 149
 150 /* Copy to temp mem */
 151         p = pTempMem;
 152         for(i=0; i<sk_BLOCK_num(a); ++i)
 153                 {
 154                 memcpy(p, rgSetBlob[i].pbData, rgSetBlob[i].cbData);
 155                 p += rgSetBlob[i].cbData;
 156                 }
 157
 158 /* Copy back to user mem*/
 159         memcpy(pStart, pTempMem, totSize);
 160         OPENSSL_free(pTempMem);
 161         OPENSSL_free(rgSetBlob);
 162
 163         return(r);
 164         }
 165
 166 STACK_OF(BLOCK) *d2i_ASN1_SET(STACK_OF(BLOCK) **a, const unsigned char **pp,
 167                               long length, d2i_of_void *d2i,
 168                               void (*free_func)(BLOCK), int ex_tag,
 169                               int ex_class)
 170         {
 171         ASN1_const_CTX c;
 172         STACK_OF(BLOCK) *ret=NULL;
 173
 174         if ((a == NULL) || ((*a) == NULL))
 175                 {
 176                 if ((ret=sk_BLOCK_new_null()) == NULL)
 177                         {
 178                         ASN1err(ASN1_F_D2I_ASN1_SET,ERR_R_MALLOC_FAILURE);
 179                         goto err;
 180                         }
 181                 }
 182         else
 183                 ret=(*a);
 184
 185         c.p= *pp;
 186         c.max=(length == 0)?0:(c.p+length);
 187
 188         c.inf=ASN1_get_object(&c.p,&c.slen,&c.tag,&c.xclass,c.max-c.p);
 189         if (c.inf & 0x80) goto err;
 190         if (ex_class != c.xclass)
 191                 {
 192                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_CLASS);
 193                 goto err;
 194                 }
 195         if (ex_tag != c.tag)
 196                 {
 197                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_TAG);
 198                 goto err;
 199                 }
 200         if ((c.slen+c.p) > c.max)
 201                 {
 202                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_LENGTH_ERROR);
 203                 goto err;
 204                 }
 205         /* check for infinite constructed - it can be as long
 206          * as the amount of data passed to us */
 207         if (c.inf == (V_ASN1_CONSTRUCTED+1))
 208                 c.slen=length+ *pp-c.p;
 209         c.max=c.p+c.slen;
 210
 211         while (c.p < c.max)
 212                 {
 213                 char *s;
 214
 215                 if (M_ASN1_D2I_end_sequence()) break;
 216                 /* XXX: This was called with 4 arguments, incorrectly, it seems
 217                    if ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL) */
 218                 if ((s=d2i(NULL,&c.p,c.slen)) == NULL)
 219                         {
 220                         ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_ERROR_PARSING_SET_ELEMENT);
 221                         asn1_add_error(*pp,(int)(c.q- *pp));
 222                         goto err;
 223                         }
 224                 if (!sk_BLOCK_push(ret,s)) goto err;
 225                 }
 226         if (a != NULL) (*a)=ret;
 227         *pp=c.p;
 228         return(ret);
 229 err:
 230         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 231                 {
 232                 if (free_func != NULL)
 233                         sk_BLOCK_pop_free(ret,free_func);
 234                 else
 235                         sk_BLOCK_free(ret);
 236                 }
 237         return(NULL);
 238         }
 239
 240 #endif