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