a_set.c revision 296465
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 65typedef struct { 66 unsigned char *pbData; 67 int cbData; 68} MYBLOB; 69 70/* 71 * SetBlobCmp This function compares two elements of SET_OF block 72 */ 73static 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 */ 89int i2d_ASN1_SET(STACK * a, unsigned char **pp, i2d_of_void *i2d, int ex_tag, 90 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_num(a) - 1; i >= 0; i--) 102 ret += i2d(sk_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_num(a) < 2)) { 115 for (i = 0; i < sk_num(a); i++) 116 i2d(sk_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 = (MYBLOB *) OPENSSL_malloc(sk_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_num(a); i++) { 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 *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_num(a), sizeof(MYBLOB), SetBlobCmp); 144 if (!(pTempMem = OPENSSL_malloc(totSize))) { 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 memcpy(p, rgSetBlob[i].pbData, rgSetBlob[i].cbData); 153 p += rgSetBlob[i].cbData; 154 } 155 156/* Copy back to user mem*/ 157 memcpy(pStart, pTempMem, totSize); 158 OPENSSL_free(pTempMem); 159 OPENSSL_free(rgSetBlob); 160 161 return (r); 162} 163 164STACK *d2i_ASN1_SET(STACK ** a, const unsigned char **pp, long length, 165 d2i_of_void *d2i, void (*free_func) (void *), int ex_tag, 166 int ex_class) 167{ 168 ASN1_const_CTX c; 169 STACK *ret = NULL; 170 171 if ((a == NULL) || ((*a) == NULL)) { 172 if ((ret = sk_new_null()) == NULL) { 173 ASN1err(ASN1_F_D2I_ASN1_SET, ERR_R_MALLOC_FAILURE); 174 goto err; 175 } 176 } else 177 ret = (*a); 178 179 c.p = *pp; 180 c.max = (length == 0) ? 0 : (c.p + length); 181 182 c.inf = ASN1_get_object(&c.p, &c.slen, &c.tag, &c.xclass, c.max - c.p); 183 if (c.inf & 0x80) 184 goto err; 185 if (ex_class != c.xclass) { 186 ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_BAD_CLASS); 187 goto err; 188 } 189 if (ex_tag != c.tag) { 190 ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_BAD_TAG); 191 goto err; 192 } 193 if ((c.slen + c.p) > c.max) { 194 ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_LENGTH_ERROR); 195 goto err; 196 } 197 /* 198 * check for infinite constructed - it can be as long as the amount of 199 * data passed to us 200 */ 201 if (c.inf == (V_ASN1_CONSTRUCTED + 1)) 202 c.slen = length + *pp - c.p; 203 c.max = c.p + c.slen; 204 205 while (c.p < c.max) { 206 char *s; 207 208 if (M_ASN1_D2I_end_sequence()) 209 break; 210 /* 211 * XXX: This was called with 4 arguments, incorrectly, it seems if 212 * ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL) 213 */ 214 if ((s = d2i(NULL, &c.p, c.slen)) == NULL) { 215 ASN1err(ASN1_F_D2I_ASN1_SET, ASN1_R_ERROR_PARSING_SET_ELEMENT); 216 asn1_add_error(*pp, (int)(c.q - *pp)); 217 goto err; 218 } 219 if (!sk_push(ret, s)) 220 goto err; 221 } 222 if (a != NULL) 223 (*a) = ret; 224 *pp = c.p; 225 return (ret); 226 err: 227 if ((ret != NULL) && ((a == NULL) || (*a != ret))) { 228 if (free_func != NULL) 229 sk_pop_free(ret, free_func); 230 else 231 sk_free(ret); 232 } 233 return (NULL); 234} 235 236#endif 237