a_set.c revision bdfb8ad83da0647e9b9a32792598e8ce7ba3ef4d
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 { 67 unsigned char *pbData; 68 int cbData; 69 } MYBLOB; 70 71/* SetBlobCmp 72 * 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/* int is_set: if TRUE, then sort the contents (i.e. it isn't a SEQUENCE) */ 88int 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 134SetBlob 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 165STACK *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); 227err: 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 239