1 /* crypto/asn1/a_bytes.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 63 static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c); 64 /* type is a 'bitmap' of acceptable string types. 65 */ 66 ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, const unsigned char **pp, 67 long length, int type) 68 { 69 ASN1_STRING *ret=NULL; 70 const unsigned char *p; 71 unsigned char *s; 72 long len; 73 int inf,tag,xclass; 74 int i=0; 75 76 p= *pp; 77 inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 78 if (inf & 0x80) goto err; 79 80 if (tag >= 32) 81 { 82 i=ASN1_R_TAG_VALUE_TOO_HIGH; 83 goto err; 84 } 85 if (!(ASN1_tag2bit(tag) & type)) 86 { 87 i=ASN1_R_WRONG_TYPE; 88 goto err; 89 } 90 91 /* If a bit-string, exit early */ 92 if (tag == V_ASN1_BIT_STRING) 93 return(d2i_ASN1_BIT_STRING(a,pp,length)); 94 95 if ((a == NULL) || ((*a) == NULL)) 96 { 97 if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 98 } 99 else 100 ret=(*a); 101 102 if (len != 0) 103 { 104 s=(unsigned char *)OPENSSL_malloc((int)len+1); 105 if (s == NULL) 106 { 107 i=ERR_R_MALLOC_FAILURE; 108 goto err; 109 } 110 memcpy(s,p,(int)len); 111 s[len]='\0'; 112 p+=len; 113 } 114 else 115 s=NULL; 116 117 if (ret->data != NULL) OPENSSL_free(ret->data); 118 ret->length=(int)len; 119 ret->data=s; 120 ret->type=tag; 121 if (a != NULL) (*a)=ret; 122 *pp=p; 123 return(ret); 124 err: 125 ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i); 126 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 127 ASN1_STRING_free(ret); 128 return(NULL); 129 } 130 131 int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass) 132 { 133 int ret,r,constructed; 134 unsigned char *p; 135 136 if (a == NULL) return(0); 137 138 if (tag == V_ASN1_BIT_STRING) 139 return(i2d_ASN1_BIT_STRING(a,pp)); 140 141 ret=a->length; 142 r=ASN1_object_size(0,ret,tag); 143 if (pp == NULL) return(r); 144 p= *pp; 145 146 if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET)) 147 constructed=1; 148 else 149 constructed=0; 150 ASN1_put_object(&p,constructed,ret,tag,xclass); 151 memcpy(p,a->data,a->length); 152 p+=a->length; 153 *pp= p; 154 return(r); 155 } 156 157 ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, const unsigned char **pp, 158 long length, int Ptag, int Pclass) 159 { 160 ASN1_STRING *ret=NULL; 161 const unsigned char *p; 162 unsigned char *s; 163 long len; 164 int inf,tag,xclass; 165 int i=0; 166 167 if ((a == NULL) || ((*a) == NULL)) 168 { 169 if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 170 } 171 else 172 ret=(*a); 173 174 p= *pp; 175 inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 176 if (inf & 0x80) 177 { 178 i=ASN1_R_BAD_OBJECT_HEADER; 179 goto err; 180 } 181 182 if (tag != Ptag) 183 { 184 i=ASN1_R_WRONG_TAG; 185 goto err; 186 } 187 188 if (inf & V_ASN1_CONSTRUCTED) 189 { 190 ASN1_const_CTX c; 191 192 c.pp=pp; 193 c.p=p; 194 c.inf=inf; 195 c.slen=len; 196 c.tag=Ptag; 197 c.xclass=Pclass; 198 c.max=(length == 0)?0:(p+length); 199 if (!asn1_collate_primitive(ret,&c)) 200 goto err; 201 else 202 { 203 p=c.p; 204 } 205 } 206 else 207 { 208 if (len != 0) 209 { 210 if ((ret->length < len) || (ret->data == NULL)) 211 { 212 if (ret->data != NULL) OPENSSL_free(ret->data); 213 s=(unsigned char *)OPENSSL_malloc((int)len + 1); 214 if (s == NULL) 215 { 216 i=ERR_R_MALLOC_FAILURE; 217 goto err; 218 } 219 } 220 else 221 s=ret->data; 222 memcpy(s,p,(int)len); 223 s[len] = '\0'; 224 p+=len; 225 } 226 else 227 { 228 s=NULL; 229 if (ret->data != NULL) OPENSSL_free(ret->data); 230 } 231 232 ret->length=(int)len; 233 ret->data=s; 234 ret->type=Ptag; 235 } 236 237 if (a != NULL) (*a)=ret; 238 *pp=p; 239 return(ret); 240 err: 241 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 242 ASN1_STRING_free(ret); 243 ASN1err(ASN1_F_D2I_ASN1_BYTES,i); 244 return(NULL); 245 } 246 247 248 /* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse 249 * them into the one structure that is then returned */ 250 /* There have been a few bug fixes for this function from 251 * Paul Keogh <paul.keogh (at) sse.ie>, many thanks to him */ 252 static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c) 253 { 254 ASN1_STRING *os=NULL; 255 BUF_MEM b; 256 int num; 257 258 b.length=0; 259 b.max=0; 260 b.data=NULL; 261 262 if (a == NULL) 263 { 264 c->error=ERR_R_PASSED_NULL_PARAMETER; 265 goto err; 266 } 267 268 num=0; 269 for (;;) 270 { 271 if (c->inf & 1) 272 { 273 c->eos=ASN1_const_check_infinite_end(&c->p, 274 (long)(c->max-c->p)); 275 if (c->eos) break; 276 } 277 else 278 { 279 if (c->slen <= 0) break; 280 } 281 282 c->q=c->p; 283 if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass) 284 == NULL) 285 { 286 c->error=ERR_R_ASN1_LIB; 287 goto err; 288 } 289 290 if (!BUF_MEM_grow_clean(&b,num+os->length)) 291 { 292 c->error=ERR_R_BUF_LIB; 293 goto err; 294 } 295 memcpy(&(b.data[num]),os->data,os->length); 296 if (!(c->inf & 1)) 297 c->slen-=(c->p-c->q); 298 num+=os->length; 299 } 300 301 if (!asn1_const_Finish(c)) goto err; 302 303 a->length=num; 304 if (a->data != NULL) OPENSSL_free(a->data); 305 a->data=(unsigned char *)b.data; 306 if (os != NULL) ASN1_STRING_free(os); 307 return(1); 308 err: 309 ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error); 310 if (os != NULL) ASN1_STRING_free(os); 311 if (b.data != NULL) OPENSSL_free(b.data); 312 return(0); 313 } 314 315
