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| 1 /* crypto/asn1/asn1_lib.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.h> | |
| 63 #include <openssl/asn1_mac.h> | |
| 64 | |
| 65 static int asn1_get_length(const unsigned char **pp,int *inf,long *rl,int max); | |
| 66 static void asn1_put_length(unsigned char **pp, int length); | |
| 67 const char ASN1_version[]="ASN.1" OPENSSL_VERSION_PTEXT; | |
| 68 | |
| 69 static int _asn1_check_infinite_end(const unsigned char **p, long len) | |
| 70 { | |
| 71 /* If there is 0 or 1 byte left, the length check should pick | |
| 72 * things up */ | |
| 73 if (len <= 0) | |
| 74 return(1); | |
| 75 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) | |
| 76 { | |
| 77 (*p)+=2; | |
| 78 return(1); | |
| 79 } | |
| 80 return(0); | |
| 81 } | |
| 82 | |
| 83 int ASN1_check_infinite_end(unsigned char **p, long len) | |
| 84 { | |
| 85 return _asn1_check_infinite_end((const unsigned char **)p, len); | |
| 86 } | |
| 87 | |
| 88 int ASN1_const_check_infinite_end(const unsigned char **p, long len) | |
| 89 { | |
| 90 return _asn1_check_infinite_end(p, len); | |
| 91 } | |
| 92 | |
| 93 | |
| 94 int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag, | |
| 95 int *pclass, long omax) | |
| 96 { | |
| 97 int i,ret; | |
| 98 long l; | |
| 99 const unsigned char *p= *pp; | |
| 100 int tag,xclass,inf; | |
| 101 long max=omax; | |
| 102 | |
| 103 if (!max) goto err; | |
| 104 ret=(*p&V_ASN1_CONSTRUCTED); | |
| 105 xclass=(*p&V_ASN1_PRIVATE); | |
| 106 i= *p&V_ASN1_PRIMITIVE_TAG; | |
| 107 if (i == V_ASN1_PRIMITIVE_TAG) | |
| 108 { /* high-tag */ | |
| 109 p++; | |
| 110 if (--max == 0) goto err; | |
| 111 l=0; | |
| 112 while (*p&0x80) | |
| 113 { | |
| 114 l<<=7L; | |
| 115 l|= *(p++)&0x7f; | |
| 116 if (--max == 0) goto err; | |
| 117 if (l > (INT_MAX >> 7L)) goto err; | |
| 118 } | |
| 119 l<<=7L; | |
| 120 l|= *(p++)&0x7f; | |
| 121 tag=(int)l; | |
| 122 if (--max == 0) goto err; | |
| 123 } | |
| 124 else | |
| 125 { | |
| 126 tag=i; | |
| 127 p++; | |
| 128 if (--max == 0) goto err; | |
| 129 } | |
| 130 *ptag=tag; | |
| 131 *pclass=xclass; | |
| 132 if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err; | |
| 133 | |
| 134 #if 0 | |
| 135 fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n", | |
| 136 (int)p,*plength,omax,(int)*pp,(int)(p+ *plength), | |
| 137 (int)(omax+ *pp)); | |
| 138 | |
| 139 #endif | |
| 140 if (*plength > (omax - (p - *pp))) | |
| 141 { | |
| 142 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_TOO_LONG); | |
| 143 /* Set this so that even if things are not long enough | |
| 144 * the values are set correctly */ | |
| 145 ret|=0x80; | |
| 146 } | |
| 147 *pp=p; | |
| 148 return(ret|inf); | |
| 149 err: | |
| 150 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG); | |
| 151 return(0x80); | |
| 152 } | |
| 153 | |
| 154 static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max
) | |
| 155 { | |
| 156 const unsigned char *p= *pp; | |
| 157 unsigned long ret=0; | |
| 158 unsigned int i; | |
| 159 | |
| 160 if (max-- < 1) return(0); | |
| 161 if (*p == 0x80) | |
| 162 { | |
| 163 *inf=1; | |
| 164 ret=0; | |
| 165 p++; | |
| 166 } | |
| 167 else | |
| 168 { | |
| 169 *inf=0; | |
| 170 i= *p&0x7f; | |
| 171 if (*(p++) & 0x80) | |
| 172 { | |
| 173 if (i > sizeof(long)) | |
| 174 return 0; | |
| 175 if (max-- == 0) return(0); | |
| 176 while (i-- > 0) | |
| 177 { | |
| 178 ret<<=8L; | |
| 179 ret|= *(p++); | |
| 180 if (max-- == 0) return(0); | |
| 181 } | |
| 182 } | |
| 183 else | |
| 184 ret=i; | |
| 185 } | |
| 186 if (ret > LONG_MAX) | |
| 187 return 0; | |
| 188 *pp=p; | |
| 189 *rl=(long)ret; | |
| 190 return(1); | |
| 191 } | |
| 192 | |
| 193 /* class 0 is constructed | |
| 194 * constructed == 2 for indefinite length constructed */ | |
| 195 void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag, | |
| 196 int xclass) | |
| 197 { | |
| 198 unsigned char *p= *pp; | |
| 199 int i, ttag; | |
| 200 | |
| 201 i=(constructed)?V_ASN1_CONSTRUCTED:0; | |
| 202 i|=(xclass&V_ASN1_PRIVATE); | |
| 203 if (tag < 31) | |
| 204 *(p++)=i|(tag&V_ASN1_PRIMITIVE_TAG); | |
| 205 else | |
| 206 { | |
| 207 *(p++)=i|V_ASN1_PRIMITIVE_TAG; | |
| 208 for(i = 0, ttag = tag; ttag > 0; i++) ttag >>=7; | |
| 209 ttag = i; | |
| 210 while(i-- > 0) | |
| 211 { | |
| 212 p[i] = tag & 0x7f; | |
| 213 if(i != (ttag - 1)) p[i] |= 0x80; | |
| 214 tag >>= 7; | |
| 215 } | |
| 216 p += ttag; | |
| 217 } | |
| 218 if (constructed == 2) | |
| 219 *(p++)=0x80; | |
| 220 else | |
| 221 asn1_put_length(&p,length); | |
| 222 *pp=p; | |
| 223 } | |
| 224 | |
| 225 int ASN1_put_eoc(unsigned char **pp) | |
| 226 { | |
| 227 unsigned char *p = *pp; | |
| 228 *p++ = 0; | |
| 229 *p++ = 0; | |
| 230 *pp = p; | |
| 231 return 2; | |
| 232 } | |
| 233 | |
| 234 static void asn1_put_length(unsigned char **pp, int length) | |
| 235 { | |
| 236 unsigned char *p= *pp; | |
| 237 int i,l; | |
| 238 if (length <= 127) | |
| 239 *(p++)=(unsigned char)length; | |
| 240 else | |
| 241 { | |
| 242 l=length; | |
| 243 for (i=0; l > 0; i++) | |
| 244 l>>=8; | |
| 245 *(p++)=i|0x80; | |
| 246 l=i; | |
| 247 while (i-- > 0) | |
| 248 { | |
| 249 p[i]=length&0xff; | |
| 250 length>>=8; | |
| 251 } | |
| 252 p+=l; | |
| 253 } | |
| 254 *pp=p; | |
| 255 } | |
| 256 | |
| 257 int ASN1_object_size(int constructed, int length, int tag) | |
| 258 { | |
| 259 int ret; | |
| 260 | |
| 261 ret=length; | |
| 262 ret++; | |
| 263 if (tag >= 31) | |
| 264 { | |
| 265 while (tag > 0) | |
| 266 { | |
| 267 tag>>=7; | |
| 268 ret++; | |
| 269 } | |
| 270 } | |
| 271 if (constructed == 2) | |
| 272 return ret + 3; | |
| 273 ret++; | |
| 274 if (length > 127) | |
| 275 { | |
| 276 while (length > 0) | |
| 277 { | |
| 278 length>>=8; | |
| 279 ret++; | |
| 280 } | |
| 281 } | |
| 282 return(ret); | |
| 283 } | |
| 284 | |
| 285 static int _asn1_Finish(ASN1_const_CTX *c) | |
| 286 { | |
| 287 if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos)) | |
| 288 { | |
| 289 if (!ASN1_const_check_infinite_end(&c->p,c->slen)) | |
| 290 { | |
| 291 c->error=ERR_R_MISSING_ASN1_EOS; | |
| 292 return(0); | |
| 293 } | |
| 294 } | |
| 295 if ( ((c->slen != 0) && !(c->inf & 1)) || | |
| 296 ((c->slen < 0) && (c->inf & 1))) | |
| 297 { | |
| 298 c->error=ERR_R_ASN1_LENGTH_MISMATCH; | |
| 299 return(0); | |
| 300 } | |
| 301 return(1); | |
| 302 } | |
| 303 | |
| 304 int asn1_Finish(ASN1_CTX *c) | |
| 305 { | |
| 306 return _asn1_Finish((ASN1_const_CTX *)c); | |
| 307 } | |
| 308 | |
| 309 int asn1_const_Finish(ASN1_const_CTX *c) | |
| 310 { | |
| 311 return _asn1_Finish(c); | |
| 312 } | |
| 313 | |
| 314 int asn1_GetSequence(ASN1_const_CTX *c, long *length) | |
| 315 { | |
| 316 const unsigned char *q; | |
| 317 | |
| 318 q=c->p; | |
| 319 c->inf=ASN1_get_object(&(c->p),&(c->slen),&(c->tag),&(c->xclass), | |
| 320 *length); | |
| 321 if (c->inf & 0x80) | |
| 322 { | |
| 323 c->error=ERR_R_BAD_GET_ASN1_OBJECT_CALL; | |
| 324 return(0); | |
| 325 } | |
| 326 if (c->tag != V_ASN1_SEQUENCE) | |
| 327 { | |
| 328 c->error=ERR_R_EXPECTING_AN_ASN1_SEQUENCE; | |
| 329 return(0); | |
| 330 } | |
| 331 (*length)-=(c->p-q); | |
| 332 if (c->max && (*length < 0)) | |
| 333 { | |
| 334 c->error=ERR_R_ASN1_LENGTH_MISMATCH; | |
| 335 return(0); | |
| 336 } | |
| 337 if (c->inf == (1|V_ASN1_CONSTRUCTED)) | |
| 338 c->slen= *length+ *(c->pp)-c->p; | |
| 339 c->eos=0; | |
| 340 return(1); | |
| 341 } | |
| 342 | |
| 343 int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str) | |
| 344 { | |
| 345 if (str == NULL) | |
| 346 return 0; | |
| 347 dst->type = str->type; | |
| 348 if (!ASN1_STRING_set(dst,str->data,str->length)) | |
| 349 return 0; | |
| 350 dst->flags = str->flags; | |
| 351 return 1; | |
| 352 } | |
| 353 | |
| 354 ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str) | |
| 355 { | |
| 356 ASN1_STRING *ret; | |
| 357 if (!str) | |
| 358 return NULL; | |
| 359 ret=ASN1_STRING_new(); | |
| 360 if (!ret) | |
| 361 return NULL; | |
| 362 if (!ASN1_STRING_copy(ret,str)) | |
| 363 { | |
| 364 ASN1_STRING_free(ret); | |
| 365 return NULL; | |
| 366 } | |
| 367 return ret; | |
| 368 } | |
| 369 | |
| 370 int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len) | |
| 371 { | |
| 372 unsigned char *c; | |
| 373 const char *data=_data; | |
| 374 | |
| 375 if (len < 0) | |
| 376 { | |
| 377 if (data == NULL) | |
| 378 return(0); | |
| 379 else | |
| 380 len=strlen(data); | |
| 381 } | |
| 382 if ((str->length < len) || (str->data == NULL)) | |
| 383 { | |
| 384 c=str->data; | |
| 385 if (c == NULL) | |
| 386 str->data=OPENSSL_malloc(len+1); | |
| 387 else | |
| 388 str->data=OPENSSL_realloc(c,len+1); | |
| 389 | |
| 390 if (str->data == NULL) | |
| 391 { | |
| 392 ASN1err(ASN1_F_ASN1_STRING_SET,ERR_R_MALLOC_FAILURE); | |
| 393 str->data=c; | |
| 394 return(0); | |
| 395 } | |
| 396 } | |
| 397 str->length=len; | |
| 398 if (data != NULL) | |
| 399 { | |
| 400 memcpy(str->data,data,len); | |
| 401 /* an allowance for strings :-) */ | |
| 402 str->data[len]='\0'; | |
| 403 } | |
| 404 return(1); | |
| 405 } | |
| 406 | |
| 407 void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len) | |
| 408 { | |
| 409 if (str->data) | |
| 410 OPENSSL_free(str->data); | |
| 411 str->data = data; | |
| 412 str->length = len; | |
| 413 } | |
| 414 | |
| 415 ASN1_STRING *ASN1_STRING_new(void) | |
| 416 { | |
| 417 return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING)); | |
| 418 } | |
| 419 | |
| 420 | |
| 421 ASN1_STRING *ASN1_STRING_type_new(int type) | |
| 422 { | |
| 423 ASN1_STRING *ret; | |
| 424 | |
| 425 ret=(ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING)); | |
| 426 if (ret == NULL) | |
| 427 { | |
| 428 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW,ERR_R_MALLOC_FAILURE); | |
| 429 return(NULL); | |
| 430 } | |
| 431 ret->length=0; | |
| 432 ret->type=type; | |
| 433 ret->data=NULL; | |
| 434 ret->flags=0; | |
| 435 return(ret); | |
| 436 } | |
| 437 | |
| 438 void ASN1_STRING_free(ASN1_STRING *a) | |
| 439 { | |
| 440 if (a == NULL) return; | |
| 441 if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF)) | |
| 442 OPENSSL_free(a->data); | |
| 443 OPENSSL_free(a); | |
| 444 } | |
| 445 | |
| 446 int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b) | |
| 447 { | |
| 448 int i; | |
| 449 | |
| 450 i=(a->length-b->length); | |
| 451 if (i == 0) | |
| 452 { | |
| 453 i=memcmp(a->data,b->data,a->length); | |
| 454 if (i == 0) | |
| 455 return(a->type-b->type); | |
| 456 else | |
| 457 return(i); | |
| 458 } | |
| 459 else | |
| 460 return(i); | |
| 461 } | |
| 462 | |
| 463 void asn1_add_error(const unsigned char *address, int offset) | |
| 464 { | |
| 465 char buf1[DECIMAL_SIZE(address)+1],buf2[DECIMAL_SIZE(offset)+1]; | |
| 466 | |
| 467 BIO_snprintf(buf1,sizeof buf1,"%lu",(unsigned long)address); | |
| 468 BIO_snprintf(buf2,sizeof buf2,"%d",offset); | |
| 469 ERR_add_error_data(4,"address=",buf1," offset=",buf2); | |
| 470 } | |
| 471 | |
| 472 int ASN1_STRING_length(const ASN1_STRING *x) | |
| 473 { return M_ASN1_STRING_length(x); } | |
| 474 | |
| 475 void ASN1_STRING_length_set(ASN1_STRING *x, int len) | |
| 476 { M_ASN1_STRING_length_set(x, len); return; } | |
| 477 | |
| 478 int ASN1_STRING_type(ASN1_STRING *x) | |
| 479 { return M_ASN1_STRING_type(x); } | |
| 480 | |
| 481 unsigned char * ASN1_STRING_data(ASN1_STRING *x) | |
| 482 { return M_ASN1_STRING_data(x); } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master