a_set.c revision 306195 
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 <limits.h>
61#include "cryptlib.h"
62#include <openssl/asn1_mac.h>
63
64#ifndef NO_ASN1_OLD
65
66typedef struct {
67    unsigned char *pbData;
68    int cbData;
69} MYBLOB;
70
71/*
72 * SetBlobCmp This function compares two elements of SET_OF block
73 */
74static 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/*
88 * int is_set: if TRUE, then sort the contents (i.e. it isn't a SEQUENCE)
89 */
90int i2d_ASN1_SET(STACK_OF(OPENSSL_BLOCK) *a, unsigned char **pp,
91                 i2d_of_void *i2d, int ex_tag, int ex_class, int is_set)
92{
93    int ret = 0, r;
94    int i;
95    unsigned char *p;
96    unsigned char *pStart, *pTempMem;
97    MYBLOB *rgSetBlob;
98    int totSize;
99
100    if (a == NULL)
101        return (0);
102    for (i = sk_OPENSSL_BLOCK_num(a) - 1; i >= 0; i--) {
103        int tmplen = i2d(sk_OPENSSL_BLOCK_value(a, i), NULL);
104        if (tmplen > INT_MAX - ret)
105            return -1;
106        ret += i2d(sk_OPENSSL_BLOCK_value(a, i), NULL);
107    }
108    r = ASN1_object_size(1, ret, ex_tag);
109    if (pp == NULL || r == -1)
110        return (r);
111
112    p = *pp;
113    ASN1_put_object(&p, 1, ret, ex_tag, ex_class);
114
115/* Modified by gp@nsj.co.jp */
116    /* And then again by Ben */
117    /* And again by Steve */
118
119    if (!is_set || (sk_OPENSSL_BLOCK_num(a) < 2)) {
120        for (i = 0; i < sk_OPENSSL_BLOCK_num(a); i++)
121            i2d(sk_OPENSSL_BLOCK_value(a, i), &p);
122
123        *pp = p;
124        return (r);
125    }
126
127    pStart = p;                 /* Catch the beg of Setblobs */
128    /* In this array we will store the SET blobs */
129    rgSetBlob = OPENSSL_malloc(sk_OPENSSL_BLOCK_num(a) * sizeof(MYBLOB));
130    if (rgSetBlob == NULL) {
131        ASN1err(ASN1_F_I2D_ASN1_SET, ERR_R_MALLOC_FAILURE);
132        return (0);
133    }
134
135    for (i = 0; i < sk_OPENSSL_BLOCK_num(a); i++) {
136        rgSetBlob[i].pbData = p; /* catch each set encode blob */
137        i2d(sk_OPENSSL_BLOCK_value(a, i), &p);
138        rgSetBlob[i].cbData = p - rgSetBlob[i].pbData; /* Length of this
139                                                        * SetBlob */
140    }
141    *pp = p;
142    totSize = p - pStart;       /* This is the total size of all set blobs */
143
144    /*
145     * Now we have to sort the blobs. I am using a simple algo. *Sort ptrs
146     * *Copy to temp-mem *Copy from temp-mem to user-mem
147     */
148    qsort(rgSetBlob, sk_OPENSSL_BLOCK_num(a), sizeof(MYBLOB), SetBlobCmp);
149    if (!(pTempMem = OPENSSL_malloc(totSize))) {
150        ASN1err(ASN1_F_I2D_ASN1_SET, ERR_R_MALLOC_FAILURE);
151        return (0);
152    }
153
154/* Copy to temp mem */
155    p = pTempMem;
156    for (i = 0; i < sk_OPENSSL_BLOCK_num(a); ++i) {
157        memcpy(p, rgSetBlob[i].pbData, rgSetBlob[i].cbData);
158        p += rgSetBlob[i].cbData;
159    }
160
161/* Copy back to user mem*/
162    memcpy(pStart, pTempMem, totSize);
163    OPENSSL_free(pTempMem);
164    OPENSSL_free(rgSetBlob);
165
166    return (r);
167}
168
169STACK_OF(OPENSSL_BLOCK) *d2i_ASN1_SET(STACK_OF(OPENSSL_BLOCK) **a,
170                                      const unsigned char **pp,
171                                      long length, d2i_of_void *d2i,
172                                      void (*free_func) (OPENSSL_BLOCK),
173                                      int ex_tag, int ex_class)
174{
175    ASN1_const_CTX c;
176    STACK_OF(OPENSSL_BLOCK) *ret = NULL;
177
178    if ((a == NULL) || ((*a) == NULL)) {
179        if ((ret = sk_OPENSSL_BLOCK_new_null()) == NULL) {
180            ASN1err(ASN1_F_D2I_ASN1_SET, ERR_R_MALLOC_FAILURE);
181            goto err;
182        }
183    } else
184        ret = (*a);
185
186    c.p = *pp;
187    c.max = (length == 0) ? 0 : (c.p + length);
188
189    c.inf = ASN1_get_object(&c.p, &c.slen, &c.tag, &c.xclass, c.max - c.p);
190    if (c.inf & 0x80)
191        goto err;
192    if (ex_class != c.xclass) {
193        ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_BAD_CLASS);
194        goto err;
195    }
196    if (ex_tag != c.tag) {
197        ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_BAD_TAG);
198        goto err;
199    }
200    if ((c.slen + c.p) > c.max) {
201        ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_LENGTH_ERROR);
202        goto err;
203    }
204    /*
205     * check for infinite constructed - it can be as long as the amount of
206     * data passed to us
207     */
208    if (c.inf == (V_ASN1_CONSTRUCTED + 1))
209        c.slen = length + *pp - c.p;
210    c.max = c.p + c.slen;
211
212    while (c.p < c.max) {
213        char *s;
214
215        if (M_ASN1_D2I_end_sequence())
216            break;
217        /*
218         * XXX: This was called with 4 arguments, incorrectly, it seems if
219         * ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL)
220         */
221        if ((s = d2i(NULL, &c.p, c.slen)) == NULL) {
222            ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_ERROR_PARSING_SET_ELEMENT);
223            asn1_add_error(*pp, (int)(c.p - *pp));
224            goto err;
225        }
226        if (!sk_OPENSSL_BLOCK_push(ret, s))
227            goto err;
228    }
229    if (a != NULL)
230        (*a) = ret;
231    *pp = c.p;
232    return (ret);
233 err:
234    if ((ret != NULL) && ((a == NULL) || (*a != ret))) {
235        if (free_func != NULL)
236            sk_OPENSSL_BLOCK_pop_free(ret, free_func);
237        else
238            sk_OPENSSL_BLOCK_free(ret);
239    }
240    return (NULL);
241}
242
243#endif
244