1/* crypto/asn1/a_bytes.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.h> 62 63static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c); 64/* type is a 'bitmap' of acceptable string types. 65 */ 66ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, unsigned char **pp, 67 long length, int type) 68 { 69 ASN1_STRING *ret=NULL; 70 unsigned char *p,*s; 71 long len; 72 int inf,tag,xclass; 73 int i=0; 74 75 p= *pp; 76 inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 77 if (inf & 0x80) goto err; 78 79 if (tag >= 32) 80 { 81 i=ASN1_R_TAG_VALUE_TOO_HIGH;; 82 goto err; 83 } 84 if (!(ASN1_tag2bit(tag) & type)) 85 { 86 i=ASN1_R_WRONG_TYPE; 87 goto err; 88 } 89 90 /* If a bit-string, exit early */ 91 if (tag == V_ASN1_BIT_STRING) 92 return(d2i_ASN1_BIT_STRING(a,pp,length)); 93 94 if ((a == NULL) || ((*a) == NULL)) 95 { 96 if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 97 } 98 else 99 ret=(*a); 100 101 if (len != 0) 102 { 103 s=(unsigned char *)OPENSSL_malloc((int)len+1); 104 if (s == NULL) 105 { 106 i=ERR_R_MALLOC_FAILURE; 107 goto err; 108 } 109 memcpy(s,p,(int)len); 110 s[len]='\0'; 111 p+=len; 112 } 113 else 114 s=NULL; 115 116 if (ret->data != NULL) OPENSSL_free(ret->data); 117 ret->length=(int)len; 118 ret->data=s; 119 ret->type=tag; 120 if (a != NULL) (*a)=ret; 121 *pp=p; 122 return(ret); 123err: 124 ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i); 125 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 126 ASN1_STRING_free(ret); 127 return(NULL); 128 } 129 130int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass) 131 { 132 int ret,r,constructed; 133 unsigned char *p; 134 135 if (a == NULL) return(0); 136 137 if (tag == V_ASN1_BIT_STRING) 138 return(i2d_ASN1_BIT_STRING(a,pp)); 139 140 ret=a->length; 141 r=ASN1_object_size(0,ret,tag); 142 if (pp == NULL) return(r); 143 p= *pp; 144 145 if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET)) 146 constructed=1; 147 else 148 constructed=0; 149 ASN1_put_object(&p,constructed,ret,tag,xclass); 150 memcpy(p,a->data,a->length); 151 p+=a->length; 152 *pp= p; 153 return(r); 154 } 155 156ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, unsigned char **pp, long length, 157 int Ptag, int Pclass) 158 { 159 ASN1_STRING *ret=NULL; 160 unsigned char *p,*s; 161 long len; 162 int inf,tag,xclass; 163 int i=0; 164 165 if ((a == NULL) || ((*a) == NULL)) 166 { 167 if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 168 } 169 else 170 ret=(*a); 171 172 p= *pp; 173 inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 174 if (inf & 0x80) 175 { 176 i=ASN1_R_BAD_OBJECT_HEADER; 177 goto err; 178 } 179 180 if (tag != Ptag) 181 { 182 i=ASN1_R_WRONG_TAG; 183 goto err; 184 } 185 186 if (inf & V_ASN1_CONSTRUCTED) 187 { 188 ASN1_CTX c; 189 190 c.pp=pp; 191 c.p=p; 192 c.inf=inf; 193 c.slen=len; 194 c.tag=Ptag; 195 c.xclass=Pclass; 196 c.max=(length == 0)?0:(p+length); 197 if (!asn1_collate_primitive(ret,&c)) 198 goto err; 199 else 200 { 201 p=c.p; 202 } 203 } 204 else 205 { 206 if (len != 0) 207 { 208 if ((ret->length < len) || (ret->data == NULL)) 209 { 210 if (ret->data != NULL) OPENSSL_free(ret->data); 211 s=(unsigned char *)OPENSSL_malloc((int)len + 1); 212 if (s == NULL) 213 { 214 i=ERR_R_MALLOC_FAILURE; 215 goto err; 216 } 217 } 218 else 219 s=ret->data; 220 memcpy(s,p,(int)len); 221 s[len] = '\0'; 222 p+=len; 223 } 224 else 225 { 226 s=NULL; 227 if (ret->data != NULL) OPENSSL_free(ret->data); 228 } 229 230 ret->length=(int)len; 231 ret->data=s; 232 ret->type=Ptag; 233 } 234 235 if (a != NULL) (*a)=ret; 236 *pp=p; 237 return(ret); 238err: 239 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 240 ASN1_STRING_free(ret); 241 ASN1err(ASN1_F_D2I_ASN1_BYTES,i); 242 return(NULL); 243 } 244 245 246/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse 247 * them into the one structure that is then returned */ 248/* There have been a few bug fixes for this function from 249 * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */ 250static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c) 251 { 252 ASN1_STRING *os=NULL; 253 BUF_MEM b; 254 int num; 255 256 b.length=0; 257 b.max=0; 258 b.data=NULL; 259 260 if (a == NULL) 261 { 262 c->error=ERR_R_PASSED_NULL_PARAMETER; 263 goto err; 264 } 265 266 num=0; 267 for (;;) 268 { 269 if (c->inf & 1) 270 { 271 c->eos=ASN1_check_infinite_end(&c->p, 272 (long)(c->max-c->p)); 273 if (c->eos) break; 274 } 275 else 276 { 277 if (c->slen <= 0) break; 278 } 279 280 c->q=c->p; 281 if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass) 282 == NULL) 283 { 284 c->error=ERR_R_ASN1_LIB; 285 goto err; 286 } 287 288 if (!BUF_MEM_grow_clean(&b,num+os->length)) 289 { 290 c->error=ERR_R_BUF_LIB; 291 goto err; 292 } 293 memcpy(&(b.data[num]),os->data,os->length); 294 if (!(c->inf & 1)) 295 c->slen-=(c->p-c->q); 296 num+=os->length; 297 } 298 299 if (!asn1_Finish(c)) goto err; 300 301 a->length=num; 302 if (a->data != NULL) OPENSSL_free(a->data); 303 a->data=(unsigned char *)b.data; 304 if (os != NULL) ASN1_STRING_free(os); 305 return(1); 306err: 307 ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error); 308 if (os != NULL) ASN1_STRING_free(os); 309 if (b.data != NULL) OPENSSL_free(b.data); 310 return(0); 311 } 312 313