crypto/openssl/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 *a, unsigned char **pp, i2d_of_void *i2d, int ex_tag,
  89                  int ex_class, int is_set)
  90         {
  91         int ret=0,r;
  92         int i;
  93         unsigned char *p;
  94         unsigned char *pStart, *pTempMem;
  95         MYBLOB *rgSetBlob;
  96         int totSize;
  97
  98         if (a == NULL) return(0);
  99         for (i=sk_num(a)-1; i>=0; i--)
 100                 ret+=i2d(sk_value(a,i),NULL);
 101         r=ASN1_object_size(1,ret,ex_tag);
 102         if (pp == NULL) return(r);
 103
 104         p= *pp;
 105         ASN1_put_object(&p,1,ret,ex_tag,ex_class);
 106
 107 /* Modified by gp@nsj.co.jp */
 108         /* And then again by Ben */
 109         /* And again by Steve */
 110
 111         if(!is_set || (sk_num(a) < 2))
 112                 {
 113                 for (i=0; i<sk_num(a); i++)
 114                         i2d(sk_value(a,i),&p);
 115
 116                 *pp=p;
 117                 return(r);
 118                 }
 119
 120         pStart  = p; /* Catch the beg of Setblobs*/
 121                 /* In this array we will store the SET blobs */
 122                 rgSetBlob = (MYBLOB *)OPENSSL_malloc(sk_num(a) * sizeof(MYBLOB));
 123                 if (rgSetBlob == NULL)
 124                         {
 125                         ASN1err(ASN1_F_I2D_ASN1_SET,ERR_R_MALLOC_FAILURE);
 126                         return(0);
 127                         }
 128
 129         for (i=0; i<sk_num(a); i++)
 130                 {
 131                 rgSetBlob[i].pbData = p;  /* catch each set encode blob */
 132                 i2d(sk_value(a,i),&p);
 133                 rgSetBlob[i].cbData = p - rgSetBlob[i].pbData; /* Length of this
 134 SetBlob
 135 */
 136                 }
 137         *pp=p;
 138         totSize = p - pStart; /* This is the total size of all set blobs */
 139
 140  /* Now we have to sort the blobs. I am using a simple algo.
 141     *Sort ptrs *Copy to temp-mem *Copy from temp-mem to user-mem*/
 142         qsort( rgSetBlob, sk_num(a), sizeof(MYBLOB), SetBlobCmp);
 143                 if (!(pTempMem = OPENSSL_malloc(totSize)))
 144                         {
 145                         ASN1err(ASN1_F_I2D_ASN1_SET,ERR_R_MALLOC_FAILURE);
 146                         return(0);
 147                         }
 148
 149 /* Copy to temp mem */
 150         p = pTempMem;
 151         for(i=0; i<sk_num(a); ++i)
 152                 {
 153                 memcpy(p, rgSetBlob[i].pbData, rgSetBlob[i].cbData);
 154                 p += rgSetBlob[i].cbData;
 155                 }
 156
 157 /* Copy back to user mem*/
 158         memcpy(pStart, pTempMem, totSize);
 159         OPENSSL_free(pTempMem);
 160         OPENSSL_free(rgSetBlob);
 161
 162         return(r);
 163         }
 164
 165 STACK *d2i_ASN1_SET(STACK **a, const unsigned char **pp, long length,
 166                     d2i_of_void *d2i, void (*free_func)(void *), int ex_tag,
 167                     int ex_class)
 168         {
 169         ASN1_const_CTX c;
 170         STACK *ret=NULL;
 171
 172         if ((a == NULL) || ((*a) == NULL))
 173                 {
 174                 if ((ret=sk_new_null()) == NULL)
 175                         {
 176                         ASN1err(ASN1_F_D2I_ASN1_SET,ERR_R_MALLOC_FAILURE);
 177                         goto err;
 178                         }
 179                 }
 180         else
 181                 ret=(*a);
 182
 183         c.p= *pp;
 184         c.max=(length == 0)?0:(c.p+length);
 185
 186         c.inf=ASN1_get_object(&c.p,&c.slen,&c.tag,&c.xclass,c.max-c.p);
 187         if (c.inf & 0x80) goto err;
 188         if (ex_class != c.xclass)
 189                 {
 190                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_CLASS);
 191                 goto err;
 192                 }
 193         if (ex_tag != c.tag)
 194                 {
 195                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_TAG);
 196                 goto err;
 197                 }
 198         if ((c.slen+c.p) > c.max)
 199                 {
 200                 ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_LENGTH_ERROR);
 201                 goto err;
 202                 }
 203         /* check for infinite constructed - it can be as long
 204          * as the amount of data passed to us */
 205         if (c.inf == (V_ASN1_CONSTRUCTED+1))
 206                 c.slen=length+ *pp-c.p;
 207         c.max=c.p+c.slen;
 208
 209         while (c.p < c.max)
 210                 {
 211                 char *s;
 212
 213                 if (M_ASN1_D2I_end_sequence()) break;
 214                 /* XXX: This was called with 4 arguments, incorrectly, it seems
 215                    if ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL) */
 216                 if ((s=d2i(NULL,&c.p,c.slen)) == NULL)
 217                         {
 218                         ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_ERROR_PARSING_SET_ELEMENT);
 219                         asn1_add_error(*pp,(int)(c.q- *pp));
 220                         goto err;
 221                         }
 222                 if (!sk_push(ret,s)) goto err;
 223                 }
 224         if (a != NULL) (*a)=ret;
 225         *pp=c.p;
 226         return(ret);
 227 err:
 228         if ((ret != NULL) && ((a == NULL) || (*a != ret)))
 229                 {
 230                 if (free_func != NULL)
 231                         sk_pop_free(ret,free_func);
 232                 else
 233                         sk_free(ret);
 234                 }
 235         return(NULL);
 236         }
 237
 238 #endif