Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* asn1_gen.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 2002. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 2002 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * licensing@OpenSSL.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | |
| 59 | #include "cryptlib.h" |
| 60 | #include <openssl/asn1.h> |
| 61 | #include <openssl/x509v3.h> |
| 62 | |
| 63 | #define ASN1_GEN_FLAG 0x10000 |
| 64 | #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1) |
| 65 | #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2) |
| 66 | #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3) |
| 67 | #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4) |
| 68 | #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5) |
| 69 | #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6) |
| 70 | #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7) |
| 71 | #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8) |
| 72 | |
| 73 | #define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val} |
| 74 | |
| 75 | #define ASN1_FLAG_EXP_MAX 20 |
| 76 | |
| 77 | /* Input formats */ |
| 78 | |
| 79 | /* ASCII: default */ |
| 80 | #define ASN1_GEN_FORMAT_ASCII 1 |
| 81 | /* UTF8 */ |
| 82 | #define ASN1_GEN_FORMAT_UTF8 2 |
| 83 | /* Hex */ |
| 84 | #define ASN1_GEN_FORMAT_HEX 3 |
| 85 | /* List of bits */ |
| 86 | #define ASN1_GEN_FORMAT_BITLIST 4 |
| 87 | |
| 88 | |
| 89 | struct tag_name_st |
| 90 | { |
| 91 | const char *strnam; |
| 92 | int len; |
| 93 | int tag; |
| 94 | }; |
| 95 | |
| 96 | typedef struct |
| 97 | { |
| 98 | int exp_tag; |
| 99 | int exp_class; |
| 100 | int exp_constructed; |
| 101 | int exp_pad; |
| 102 | long exp_len; |
| 103 | } tag_exp_type; |
| 104 | |
| 105 | typedef struct |
| 106 | { |
| 107 | int imp_tag; |
| 108 | int imp_class; |
| 109 | int utype; |
| 110 | int format; |
| 111 | const char *str; |
| 112 | tag_exp_type exp_list[ASN1_FLAG_EXP_MAX]; |
| 113 | int exp_count; |
| 114 | } tag_exp_arg; |
| 115 | |
| 116 | static int bitstr_cb(const char *elem, int len, void *bitstr); |
| 117 | static int asn1_cb(const char *elem, int len, void *bitstr); |
| 118 | static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok); |
| 119 | static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass); |
| 120 | static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf); |
| 121 | static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype); |
| 122 | static int asn1_str2tag(const char *tagstr, int len); |
| 123 | |
| 124 | ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf) |
| 125 | { |
| 126 | X509V3_CTX cnf; |
| 127 | |
| 128 | if (!nconf) |
| 129 | return ASN1_generate_v3(str, NULL); |
| 130 | |
| 131 | X509V3_set_nconf(&cnf, nconf); |
| 132 | return ASN1_generate_v3(str, &cnf); |
| 133 | } |
| 134 | |
| 135 | ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf) |
| 136 | { |
| 137 | ASN1_TYPE *ret; |
| 138 | tag_exp_arg asn1_tags; |
| 139 | tag_exp_type *etmp; |
| 140 | |
| 141 | int i, len; |
| 142 | |
| 143 | unsigned char *orig_der = NULL, *new_der = NULL; |
| 144 | const unsigned char *cpy_start; |
| 145 | unsigned char *p; |
| 146 | const unsigned char *cp; |
| 147 | int cpy_len; |
| 148 | long hdr_len; |
| 149 | int hdr_constructed = 0, hdr_tag, hdr_class; |
| 150 | int r; |
| 151 | |
| 152 | asn1_tags.imp_tag = -1; |
| 153 | asn1_tags.imp_class = -1; |
| 154 | asn1_tags.format = ASN1_GEN_FORMAT_ASCII; |
| 155 | asn1_tags.exp_count = 0; |
| 156 | if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) |
| 157 | return NULL; |
| 158 | |
| 159 | if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET)) |
| 160 | { |
| 161 | if (!cnf) |
| 162 | { |
| 163 | ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG); |
| 164 | return NULL; |
| 165 | } |
| 166 | ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf); |
| 167 | } |
| 168 | else |
| 169 | ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype); |
| 170 | |
| 171 | if (!ret) |
| 172 | return NULL; |
| 173 | |
| 174 | /* If no tagging return base type */ |
| 175 | if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0)) |
| 176 | return ret; |
| 177 | |
| 178 | /* Generate the encoding */ |
| 179 | cpy_len = i2d_ASN1_TYPE(ret, &orig_der); |
| 180 | ASN1_TYPE_free(ret); |
| 181 | ret = NULL; |
| 182 | /* Set point to start copying for modified encoding */ |
| 183 | cpy_start = orig_der; |
| 184 | |
| 185 | /* Do we need IMPLICIT tagging? */ |
| 186 | if (asn1_tags.imp_tag != -1) |
| 187 | { |
| 188 | /* If IMPLICIT we will replace the underlying tag */ |
| 189 | /* Skip existing tag+len */ |
| 190 | r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, cpy_len); |
| 191 | if (r & 0x80) |
| 192 | goto err; |
| 193 | /* Update copy length */ |
| 194 | cpy_len -= cpy_start - orig_der; |
| 195 | /* For IMPLICIT tagging the length should match the |
| 196 | * original length and constructed flag should be |
| 197 | * consistent. |
| 198 | */ |
| 199 | if (r & 0x1) |
| 200 | { |
| 201 | /* Indefinite length constructed */ |
| 202 | hdr_constructed = 2; |
| 203 | hdr_len = 0; |
| 204 | } |
| 205 | else |
| 206 | /* Just retain constructed flag */ |
| 207 | hdr_constructed = r & V_ASN1_CONSTRUCTED; |
| 208 | /* Work out new length with IMPLICIT tag: ignore constructed |
| 209 | * because it will mess up if indefinite length |
| 210 | */ |
| 211 | len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag); |
| 212 | } |
| 213 | else |
| 214 | len = cpy_len; |
| 215 | |
| 216 | /* Work out length in any EXPLICIT, starting from end */ |
| 217 | |
| 218 | for(i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; i < asn1_tags.exp_count; i++, etmp--) |
| 219 | { |
| 220 | /* Content length: number of content octets + any padding */ |
| 221 | len += etmp->exp_pad; |
| 222 | etmp->exp_len = len; |
| 223 | /* Total object length: length including new header */ |
| 224 | len = ASN1_object_size(0, len, etmp->exp_tag); |
| 225 | } |
| 226 | |
| 227 | /* Allocate buffer for new encoding */ |
| 228 | |
| 229 | new_der = OPENSSL_malloc(len); |
| 230 | if (!new_der) |
| 231 | goto err; |
| 232 | |
| 233 | /* Generate tagged encoding */ |
| 234 | |
| 235 | p = new_der; |
| 236 | |
| 237 | /* Output explicit tags first */ |
| 238 | |
| 239 | for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++) |
| 240 | { |
| 241 | ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len, |
| 242 | etmp->exp_tag, etmp->exp_class); |
| 243 | if (etmp->exp_pad) |
| 244 | *p++ = 0; |
| 245 | } |
| 246 | |
| 247 | /* If IMPLICIT, output tag */ |
| 248 | |
| 249 | if (asn1_tags.imp_tag != -1) |
| 250 | { |
| 251 | if (asn1_tags.imp_class == V_ASN1_UNIVERSAL |
| 252 | && (asn1_tags.imp_tag == V_ASN1_SEQUENCE |
| 253 | || asn1_tags.imp_tag == V_ASN1_SET) ) |
| 254 | hdr_constructed = V_ASN1_CONSTRUCTED; |
| 255 | ASN1_put_object(&p, hdr_constructed, hdr_len, |
| 256 | asn1_tags.imp_tag, asn1_tags.imp_class); |
| 257 | } |
| 258 | |
| 259 | /* Copy across original encoding */ |
| 260 | memcpy(p, cpy_start, cpy_len); |
| 261 | |
| 262 | cp = new_der; |
| 263 | |
| 264 | /* Obtain new ASN1_TYPE structure */ |
| 265 | ret = d2i_ASN1_TYPE(NULL, &cp, len); |
| 266 | |
| 267 | err: |
| 268 | if (orig_der) |
| 269 | OPENSSL_free(orig_der); |
| 270 | if (new_der) |
| 271 | OPENSSL_free(new_der); |
| 272 | |
| 273 | return ret; |
| 274 | |
| 275 | } |
| 276 | |
| 277 | static int asn1_cb(const char *elem, int len, void *bitstr) |
| 278 | { |
| 279 | tag_exp_arg *arg = bitstr; |
| 280 | int i; |
| 281 | int utype; |
| 282 | int vlen = 0; |
| 283 | const char *p, *vstart = NULL; |
| 284 | |
| 285 | int tmp_tag, tmp_class; |
| 286 | |
| 287 | for(i = 0, p = elem; i < len; p++, i++) |
| 288 | { |
| 289 | /* Look for the ':' in name value pairs */ |
| 290 | if (*p == ':') |
| 291 | { |
| 292 | vstart = p + 1; |
| 293 | vlen = len - (vstart - elem); |
| 294 | len = p - elem; |
| 295 | break; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | utype = asn1_str2tag(elem, len); |
| 300 | |
| 301 | if (utype == -1) |
| 302 | { |
| 303 | ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG); |
| 304 | ERR_add_error_data(2, "tag=", elem); |
| 305 | return -1; |
| 306 | } |
| 307 | |
| 308 | /* If this is not a modifier mark end of string and exit */ |
| 309 | if (!(utype & ASN1_GEN_FLAG)) |
| 310 | { |
| 311 | arg->utype = utype; |
| 312 | arg->str = vstart; |
| 313 | /* If no value and not end of string, error */ |
| 314 | if (!vstart && elem[len]) |
| 315 | { |
| 316 | ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE); |
| 317 | return -1; |
| 318 | } |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | switch(utype) |
| 323 | { |
| 324 | |
| 325 | case ASN1_GEN_FLAG_IMP: |
| 326 | /* Check for illegal multiple IMPLICIT tagging */ |
| 327 | if (arg->imp_tag != -1) |
| 328 | { |
| 329 | ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING); |
| 330 | return -1; |
| 331 | } |
| 332 | if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class)) |
| 333 | return -1; |
| 334 | break; |
| 335 | |
| 336 | case ASN1_GEN_FLAG_EXP: |
| 337 | |
| 338 | if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) |
| 339 | return -1; |
| 340 | if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) |
| 341 | return -1; |
| 342 | break; |
| 343 | |
| 344 | case ASN1_GEN_FLAG_SEQWRAP: |
| 345 | if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) |
| 346 | return -1; |
| 347 | break; |
| 348 | |
| 349 | case ASN1_GEN_FLAG_SETWRAP: |
| 350 | if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) |
| 351 | return -1; |
| 352 | break; |
| 353 | |
| 354 | case ASN1_GEN_FLAG_BITWRAP: |
| 355 | if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) |
| 356 | return -1; |
| 357 | break; |
| 358 | |
| 359 | case ASN1_GEN_FLAG_OCTWRAP: |
| 360 | if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) |
| 361 | return -1; |
| 362 | break; |
| 363 | |
| 364 | case ASN1_GEN_FLAG_FORMAT: |
| 365 | if (!strncmp(vstart, "ASCII", 5)) |
| 366 | arg->format = ASN1_GEN_FORMAT_ASCII; |
| 367 | else if (!strncmp(vstart, "UTF8", 4)) |
| 368 | arg->format = ASN1_GEN_FORMAT_UTF8; |
| 369 | else if (!strncmp(vstart, "HEX", 3)) |
| 370 | arg->format = ASN1_GEN_FORMAT_HEX; |
| 371 | else if (!strncmp(vstart, "BITLIST", 3)) |
| 372 | arg->format = ASN1_GEN_FORMAT_BITLIST; |
| 373 | else |
| 374 | { |
| 375 | ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT); |
| 376 | return -1; |
| 377 | } |
| 378 | break; |
| 379 | |
| 380 | } |
| 381 | |
| 382 | return 1; |
| 383 | |
| 384 | } |
| 385 | |
| 386 | static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) |
| 387 | { |
| 388 | char erch[2]; |
| 389 | long tag_num; |
| 390 | char *eptr; |
| 391 | if (!vstart) |
| 392 | return 0; |
| 393 | tag_num = strtoul(vstart, &eptr, 10); |
| 394 | /* Check we haven't gone past max length: should be impossible */ |
| 395 | if (eptr && *eptr && (eptr > vstart + vlen)) |
| 396 | return 0; |
| 397 | if (tag_num < 0) |
| 398 | { |
| 399 | ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER); |
| 400 | return 0; |
| 401 | } |
| 402 | *ptag = tag_num; |
| 403 | /* If we have non numeric characters, parse them */ |
| 404 | if (eptr) |
| 405 | vlen -= eptr - vstart; |
| 406 | else |
| 407 | vlen = 0; |
| 408 | if (vlen) |
| 409 | { |
| 410 | switch (*eptr) |
| 411 | { |
| 412 | |
| 413 | case 'U': |
| 414 | *pclass = V_ASN1_UNIVERSAL; |
| 415 | break; |
| 416 | |
| 417 | case 'A': |
| 418 | *pclass = V_ASN1_APPLICATION; |
| 419 | break; |
| 420 | |
| 421 | case 'P': |
| 422 | *pclass = V_ASN1_PRIVATE; |
| 423 | break; |
| 424 | |
| 425 | case 'C': |
| 426 | *pclass = V_ASN1_CONTEXT_SPECIFIC; |
| 427 | break; |
| 428 | |
| 429 | default: |
| 430 | erch[0] = *eptr; |
| 431 | erch[1] = 0; |
| 432 | ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER); |
| 433 | ERR_add_error_data(2, "Char=", erch); |
| 434 | return 0; |
| 435 | break; |
| 436 | |
| 437 | } |
| 438 | } |
| 439 | else |
| 440 | *pclass = V_ASN1_CONTEXT_SPECIFIC; |
| 441 | |
| 442 | return 1; |
| 443 | |
| 444 | } |
| 445 | |
| 446 | /* Handle multiple types: SET and SEQUENCE */ |
| 447 | |
| 448 | static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf) |
| 449 | { |
| 450 | ASN1_TYPE *ret = NULL; |
| 451 | STACK_OF(ASN1_TYPE) *sk = NULL; |
| 452 | STACK_OF(CONF_VALUE) *sect = NULL; |
| 453 | unsigned char *der = NULL; |
| 454 | int derlen; |
| 455 | int i; |
| 456 | sk = sk_ASN1_TYPE_new_null(); |
| 457 | if (!sk) |
| 458 | goto bad; |
| 459 | if (section) |
| 460 | { |
| 461 | if (!cnf) |
| 462 | goto bad; |
| 463 | sect = X509V3_get_section(cnf, (char *)section); |
| 464 | if (!sect) |
| 465 | goto bad; |
| 466 | for (i = 0; i < sk_CONF_VALUE_num(sect); i++) |
| 467 | { |
| 468 | ASN1_TYPE *typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf); |
| 469 | if (!typ) |
| 470 | goto bad; |
| 471 | if (!sk_ASN1_TYPE_push(sk, typ)) |
| 472 | goto bad; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | /* Now we has a STACK of the components, convert to the correct form */ |
| 477 | |
| 478 | if (utype == V_ASN1_SET) |
| 479 | derlen = i2d_ASN1_SET_ANY(sk, &der); |
| 480 | else |
| 481 | derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); |
| 482 | |
| 483 | if (derlen < 0) |
| 484 | goto bad; |
| 485 | |
| 486 | if (!(ret = ASN1_TYPE_new())) |
| 487 | goto bad; |
| 488 | |
| 489 | if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) |
| 490 | goto bad; |
| 491 | |
| 492 | ret->type = utype; |
| 493 | |
| 494 | ret->value.asn1_string->data = der; |
| 495 | ret->value.asn1_string->length = derlen; |
| 496 | |
| 497 | der = NULL; |
| 498 | |
| 499 | bad: |
| 500 | |
| 501 | if (der) |
| 502 | OPENSSL_free(der); |
| 503 | |
| 504 | if (sk) |
| 505 | sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); |
| 506 | if (sect) |
| 507 | X509V3_section_free(cnf, sect); |
| 508 | |
| 509 | return ret; |
| 510 | } |
| 511 | |
| 512 | static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok) |
| 513 | { |
| 514 | tag_exp_type *exp_tmp; |
| 515 | /* Can only have IMPLICIT if permitted */ |
| 516 | if ((arg->imp_tag != -1) && !imp_ok) |
| 517 | { |
| 518 | ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG); |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | if (arg->exp_count == ASN1_FLAG_EXP_MAX) |
| 523 | { |
| 524 | ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED); |
| 525 | return 0; |
| 526 | } |
| 527 | |
| 528 | exp_tmp = &arg->exp_list[arg->exp_count++]; |
| 529 | |
| 530 | /* If IMPLICIT set tag to implicit value then |
| 531 | * reset implicit tag since it has been used. |
| 532 | */ |
| 533 | if (arg->imp_tag != -1) |
| 534 | { |
| 535 | exp_tmp->exp_tag = arg->imp_tag; |
| 536 | exp_tmp->exp_class = arg->imp_class; |
| 537 | arg->imp_tag = -1; |
| 538 | arg->imp_class = -1; |
| 539 | } |
| 540 | else |
| 541 | { |
| 542 | exp_tmp->exp_tag = exp_tag; |
| 543 | exp_tmp->exp_class = exp_class; |
| 544 | } |
| 545 | exp_tmp->exp_constructed = exp_constructed; |
| 546 | exp_tmp->exp_pad = exp_pad; |
| 547 | |
| 548 | return 1; |
| 549 | } |
| 550 | |
| 551 | |
| 552 | static int asn1_str2tag(const char *tagstr, int len) |
| 553 | { |
| 554 | unsigned int i; |
| 555 | static const struct tag_name_st *tntmp, tnst [] = { |
| 556 | ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), |
| 557 | ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), |
| 558 | ASN1_GEN_STR("NULL", V_ASN1_NULL), |
| 559 | ASN1_GEN_STR("INT", V_ASN1_INTEGER), |
| 560 | ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), |
| 561 | ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), |
| 562 | ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), |
| 563 | ASN1_GEN_STR("OID", V_ASN1_OBJECT), |
| 564 | ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), |
| 565 | ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), |
| 566 | ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), |
| 567 | ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), |
| 568 | ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), |
| 569 | ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), |
| 570 | ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), |
| 571 | ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), |
| 572 | ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), |
| 573 | ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), |
| 574 | ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), |
| 575 | ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), |
| 576 | ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), |
| 577 | ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), |
| 578 | ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), |
| 579 | ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), |
| 580 | ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), |
| 581 | ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), |
| 582 | ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), |
| 583 | ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), |
| 584 | ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), |
| 585 | ASN1_GEN_STR("T61", V_ASN1_T61STRING), |
| 586 | ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), |
| 587 | ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), |
| 588 | ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), |
| 589 | ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), |
| 590 | ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), |
| 591 | ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), |
| 592 | |
| 593 | /* Special cases */ |
| 594 | ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), |
| 595 | ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), |
| 596 | ASN1_GEN_STR("SET", V_ASN1_SET), |
| 597 | /* type modifiers */ |
| 598 | /* Explicit tag */ |
| 599 | ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), |
| 600 | ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), |
| 601 | /* Implicit tag */ |
| 602 | ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), |
| 603 | ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), |
| 604 | /* OCTET STRING wrapper */ |
| 605 | ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), |
| 606 | /* SEQUENCE wrapper */ |
| 607 | ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), |
| 608 | /* SET wrapper */ |
| 609 | ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), |
| 610 | /* BIT STRING wrapper */ |
| 611 | ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), |
| 612 | ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), |
| 613 | ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), |
| 614 | }; |
| 615 | |
| 616 | if (len == -1) |
| 617 | len = strlen(tagstr); |
| 618 | |
| 619 | tntmp = tnst; |
| 620 | for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) |
| 621 | { |
| 622 | if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) |
| 623 | return tntmp->tag; |
| 624 | } |
| 625 | |
| 626 | return -1; |
| 627 | } |
| 628 | |
| 629 | static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype) |
| 630 | { |
| 631 | ASN1_TYPE *atmp = NULL; |
| 632 | |
| 633 | CONF_VALUE vtmp; |
| 634 | |
| 635 | unsigned char *rdata; |
| 636 | long rdlen; |
| 637 | |
| 638 | int no_unused = 1; |
| 639 | |
| 640 | if (!(atmp = ASN1_TYPE_new())) |
| 641 | { |
| 642 | ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); |
| 643 | return NULL; |
| 644 | } |
| 645 | |
| 646 | if (!str) |
| 647 | str = ""; |
| 648 | |
| 649 | switch(utype) |
| 650 | { |
| 651 | |
| 652 | case V_ASN1_NULL: |
| 653 | if (str && *str) |
| 654 | { |
| 655 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE); |
| 656 | goto bad_form; |
| 657 | } |
| 658 | break; |
| 659 | |
| 660 | case V_ASN1_BOOLEAN: |
| 661 | if (format != ASN1_GEN_FORMAT_ASCII) |
| 662 | { |
| 663 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT); |
| 664 | goto bad_form; |
| 665 | } |
| 666 | vtmp.name = NULL; |
| 667 | vtmp.section = NULL; |
| 668 | vtmp.value = (char *)str; |
| 669 | if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) |
| 670 | { |
| 671 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN); |
| 672 | goto bad_str; |
| 673 | } |
| 674 | break; |
| 675 | |
| 676 | case V_ASN1_INTEGER: |
| 677 | case V_ASN1_ENUMERATED: |
| 678 | if (format != ASN1_GEN_FORMAT_ASCII) |
| 679 | { |
| 680 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT); |
| 681 | goto bad_form; |
| 682 | } |
| 683 | if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) |
| 684 | { |
| 685 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER); |
| 686 | goto bad_str; |
| 687 | } |
| 688 | break; |
| 689 | |
| 690 | case V_ASN1_OBJECT: |
| 691 | if (format != ASN1_GEN_FORMAT_ASCII) |
| 692 | { |
| 693 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT); |
| 694 | goto bad_form; |
| 695 | } |
| 696 | if (!(atmp->value.object = OBJ_txt2obj(str, 0))) |
| 697 | { |
| 698 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT); |
| 699 | goto bad_str; |
| 700 | } |
| 701 | break; |
| 702 | |
| 703 | case V_ASN1_UTCTIME: |
| 704 | case V_ASN1_GENERALIZEDTIME: |
| 705 | if (format != ASN1_GEN_FORMAT_ASCII) |
| 706 | { |
| 707 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT); |
| 708 | goto bad_form; |
| 709 | } |
| 710 | if (!(atmp->value.asn1_string = ASN1_STRING_new())) |
| 711 | { |
| 712 | ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); |
| 713 | goto bad_str; |
| 714 | } |
| 715 | if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) |
| 716 | { |
| 717 | ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); |
| 718 | goto bad_str; |
| 719 | } |
| 720 | atmp->value.asn1_string->type = utype; |
| 721 | if (!ASN1_TIME_check(atmp->value.asn1_string)) |
| 722 | { |
| 723 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE); |
| 724 | goto bad_str; |
| 725 | } |
| 726 | |
| 727 | break; |
| 728 | |
| 729 | case V_ASN1_BMPSTRING: |
| 730 | case V_ASN1_PRINTABLESTRING: |
| 731 | case V_ASN1_IA5STRING: |
| 732 | case V_ASN1_T61STRING: |
| 733 | case V_ASN1_UTF8STRING: |
| 734 | case V_ASN1_VISIBLESTRING: |
| 735 | case V_ASN1_UNIVERSALSTRING: |
| 736 | case V_ASN1_GENERALSTRING: |
| 737 | case V_ASN1_NUMERICSTRING: |
| 738 | |
| 739 | if (format == ASN1_GEN_FORMAT_ASCII) |
| 740 | format = MBSTRING_ASC; |
| 741 | else if (format == ASN1_GEN_FORMAT_UTF8) |
| 742 | format = MBSTRING_UTF8; |
| 743 | else |
| 744 | { |
| 745 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT); |
| 746 | goto bad_form; |
| 747 | } |
| 748 | |
| 749 | |
| 750 | if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str, |
| 751 | -1, format, ASN1_tag2bit(utype)) <= 0) |
| 752 | { |
| 753 | ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); |
| 754 | goto bad_str; |
| 755 | } |
| 756 | |
| 757 | |
| 758 | break; |
| 759 | |
| 760 | case V_ASN1_BIT_STRING: |
| 761 | |
| 762 | case V_ASN1_OCTET_STRING: |
| 763 | |
| 764 | if (!(atmp->value.asn1_string = ASN1_STRING_new())) |
| 765 | { |
| 766 | ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); |
| 767 | goto bad_form; |
| 768 | } |
| 769 | |
| 770 | if (format == ASN1_GEN_FORMAT_HEX) |
| 771 | { |
| 772 | |
| 773 | if (!(rdata = string_to_hex((char *)str, &rdlen))) |
| 774 | { |
| 775 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX); |
| 776 | goto bad_str; |
| 777 | } |
| 778 | |
| 779 | atmp->value.asn1_string->data = rdata; |
| 780 | atmp->value.asn1_string->length = rdlen; |
| 781 | atmp->value.asn1_string->type = utype; |
| 782 | |
| 783 | } |
| 784 | else if (format == ASN1_GEN_FORMAT_ASCII) |
| 785 | ASN1_STRING_set(atmp->value.asn1_string, str, -1); |
| 786 | else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING)) |
| 787 | { |
| 788 | if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string)) |
| 789 | { |
| 790 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR); |
| 791 | goto bad_str; |
| 792 | } |
| 793 | no_unused = 0; |
| 794 | |
| 795 | } |
| 796 | else |
| 797 | { |
| 798 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT); |
| 799 | goto bad_form; |
| 800 | } |
| 801 | |
| 802 | if ((utype == V_ASN1_BIT_STRING) && no_unused) |
| 803 | { |
| 804 | atmp->value.asn1_string->flags |
| 805 | &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); |
| 806 | atmp->value.asn1_string->flags |
| 807 | |= ASN1_STRING_FLAG_BITS_LEFT; |
| 808 | } |
| 809 | |
| 810 | |
| 811 | break; |
| 812 | |
| 813 | default: |
| 814 | ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE); |
| 815 | goto bad_str; |
| 816 | break; |
| 817 | } |
| 818 | |
| 819 | |
| 820 | atmp->type = utype; |
| 821 | return atmp; |
| 822 | |
| 823 | |
| 824 | bad_str: |
| 825 | ERR_add_error_data(2, "string=", str); |
| 826 | bad_form: |
| 827 | |
| 828 | ASN1_TYPE_free(atmp); |
| 829 | return NULL; |
| 830 | |
| 831 | } |
| 832 | |
| 833 | static int bitstr_cb(const char *elem, int len, void *bitstr) |
| 834 | { |
| 835 | long bitnum; |
| 836 | char *eptr; |
| 837 | if (!elem) |
| 838 | return 0; |
| 839 | bitnum = strtoul(elem, &eptr, 10); |
| 840 | if (eptr && *eptr && (eptr != elem + len)) |
| 841 | return 0; |
| 842 | if (bitnum < 0) |
| 843 | { |
| 844 | ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER); |
| 845 | return 0; |
| 846 | } |
| 847 | if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) |
| 848 | { |
| 849 | ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE); |
| 850 | return 0; |
| 851 | } |
| 852 | return 1; |
| 853 | } |
| 854 | |