v3_utl.c revision 194206
1/* v3_utl.c */ 2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project. 4 */ 5/* ==================================================================== 6 * Copyright (c) 1999-2003 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/* X509 v3 extension utilities */ 59 60 61#include <stdio.h> 62#include <ctype.h> 63#include "cryptlib.h" 64#include <openssl/conf.h> 65#include <openssl/x509v3.h> 66#include <openssl/bn.h> 67 68static char *strip_spaces(char *name); 69static int sk_strcmp(const char * const *a, const char * const *b); 70static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens); 71static void str_free(void *str); 72static int append_ia5(STACK **sk, ASN1_IA5STRING *email); 73 74static int ipv4_from_asc(unsigned char *v4, const char *in); 75static int ipv6_from_asc(unsigned char *v6, const char *in); 76static int ipv6_cb(const char *elem, int len, void *usr); 77static int ipv6_hex(unsigned char *out, const char *in, int inlen); 78 79/* Add a CONF_VALUE name value pair to stack */ 80 81int X509V3_add_value(const char *name, const char *value, 82 STACK_OF(CONF_VALUE) **extlist) 83{ 84 CONF_VALUE *vtmp = NULL; 85 char *tname = NULL, *tvalue = NULL; 86 if(name && !(tname = BUF_strdup(name))) goto err; 87 if(value && !(tvalue = BUF_strdup(value))) goto err; 88 if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err; 89 if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err; 90 vtmp->section = NULL; 91 vtmp->name = tname; 92 vtmp->value = tvalue; 93 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err; 94 return 1; 95 err: 96 X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE); 97 if(vtmp) OPENSSL_free(vtmp); 98 if(tname) OPENSSL_free(tname); 99 if(tvalue) OPENSSL_free(tvalue); 100 return 0; 101} 102 103int X509V3_add_value_uchar(const char *name, const unsigned char *value, 104 STACK_OF(CONF_VALUE) **extlist) 105 { 106 return X509V3_add_value(name,(const char *)value,extlist); 107 } 108 109/* Free function for STACK_OF(CONF_VALUE) */ 110 111void X509V3_conf_free(CONF_VALUE *conf) 112{ 113 if(!conf) return; 114 if(conf->name) OPENSSL_free(conf->name); 115 if(conf->value) OPENSSL_free(conf->value); 116 if(conf->section) OPENSSL_free(conf->section); 117 OPENSSL_free(conf); 118} 119 120int X509V3_add_value_bool(const char *name, int asn1_bool, 121 STACK_OF(CONF_VALUE) **extlist) 122{ 123 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist); 124 return X509V3_add_value(name, "FALSE", extlist); 125} 126 127int X509V3_add_value_bool_nf(char *name, int asn1_bool, 128 STACK_OF(CONF_VALUE) **extlist) 129{ 130 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist); 131 return 1; 132} 133 134 135char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a) 136{ 137 BIGNUM *bntmp = NULL; 138 char *strtmp = NULL; 139 if(!a) return NULL; 140 if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) || 141 !(strtmp = BN_bn2dec(bntmp)) ) 142 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE); 143 BN_free(bntmp); 144 return strtmp; 145} 146 147char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a) 148{ 149 BIGNUM *bntmp = NULL; 150 char *strtmp = NULL; 151 if(!a) return NULL; 152 if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) || 153 !(strtmp = BN_bn2dec(bntmp)) ) 154 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE); 155 BN_free(bntmp); 156 return strtmp; 157} 158 159ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value) 160{ 161 BIGNUM *bn = NULL; 162 ASN1_INTEGER *aint; 163 int isneg, ishex; 164 int ret; 165 if (!value) { 166 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE); 167 return 0; 168 } 169 bn = BN_new(); 170 if (value[0] == '-') { 171 value++; 172 isneg = 1; 173 } else isneg = 0; 174 175 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) { 176 value += 2; 177 ishex = 1; 178 } else ishex = 0; 179 180 if (ishex) ret = BN_hex2bn(&bn, value); 181 else ret = BN_dec2bn(&bn, value); 182 183 if (!ret || value[ret]) { 184 BN_free(bn); 185 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR); 186 return 0; 187 } 188 189 if (isneg && BN_is_zero(bn)) isneg = 0; 190 191 aint = BN_to_ASN1_INTEGER(bn, NULL); 192 BN_free(bn); 193 if (!aint) { 194 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR); 195 return 0; 196 } 197 if (isneg) aint->type |= V_ASN1_NEG; 198 return aint; 199} 200 201int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint, 202 STACK_OF(CONF_VALUE) **extlist) 203{ 204 char *strtmp; 205 int ret; 206 if(!aint) return 1; 207 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0; 208 ret = X509V3_add_value(name, strtmp, extlist); 209 OPENSSL_free(strtmp); 210 return ret; 211} 212 213int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool) 214{ 215 char *btmp; 216 if(!(btmp = value->value)) goto err; 217 if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true") 218 || !strcmp(btmp, "Y") || !strcmp(btmp, "y") 219 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) { 220 *asn1_bool = 0xff; 221 return 1; 222 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false") 223 || !strcmp(btmp, "N") || !strcmp(btmp, "n") 224 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) { 225 *asn1_bool = 0; 226 return 1; 227 } 228 err: 229 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING); 230 X509V3_conf_err(value); 231 return 0; 232} 233 234int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint) 235{ 236 ASN1_INTEGER *itmp; 237 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) { 238 X509V3_conf_err(value); 239 return 0; 240 } 241 *aint = itmp; 242 return 1; 243} 244 245#define HDR_NAME 1 246#define HDR_VALUE 2 247 248/*#define DEBUG*/ 249 250STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line) 251{ 252 char *p, *q, c; 253 char *ntmp, *vtmp; 254 STACK_OF(CONF_VALUE) *values = NULL; 255 char *linebuf; 256 int state; 257 /* We are going to modify the line so copy it first */ 258 linebuf = BUF_strdup(line); 259 state = HDR_NAME; 260 ntmp = NULL; 261 /* Go through all characters */ 262 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) { 263 264 switch(state) { 265 case HDR_NAME: 266 if(c == ':') { 267 state = HDR_VALUE; 268 *p = 0; 269 ntmp = strip_spaces(q); 270 if(!ntmp) { 271 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME); 272 goto err; 273 } 274 q = p + 1; 275 } else if(c == ',') { 276 *p = 0; 277 ntmp = strip_spaces(q); 278 q = p + 1; 279#if 0 280 printf("%s\n", ntmp); 281#endif 282 if(!ntmp) { 283 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME); 284 goto err; 285 } 286 X509V3_add_value(ntmp, NULL, &values); 287 } 288 break ; 289 290 case HDR_VALUE: 291 if(c == ',') { 292 state = HDR_NAME; 293 *p = 0; 294 vtmp = strip_spaces(q); 295#if 0 296 printf("%s\n", ntmp); 297#endif 298 if(!vtmp) { 299 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE); 300 goto err; 301 } 302 X509V3_add_value(ntmp, vtmp, &values); 303 ntmp = NULL; 304 q = p + 1; 305 } 306 307 } 308 } 309 310 if(state == HDR_VALUE) { 311 vtmp = strip_spaces(q); 312#if 0 313 printf("%s=%s\n", ntmp, vtmp); 314#endif 315 if(!vtmp) { 316 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE); 317 goto err; 318 } 319 X509V3_add_value(ntmp, vtmp, &values); 320 } else { 321 ntmp = strip_spaces(q); 322#if 0 323 printf("%s\n", ntmp); 324#endif 325 if(!ntmp) { 326 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME); 327 goto err; 328 } 329 X509V3_add_value(ntmp, NULL, &values); 330 } 331OPENSSL_free(linebuf); 332return values; 333 334err: 335OPENSSL_free(linebuf); 336sk_CONF_VALUE_pop_free(values, X509V3_conf_free); 337return NULL; 338 339} 340 341/* Delete leading and trailing spaces from a string */ 342static char *strip_spaces(char *name) 343{ 344 char *p, *q; 345 /* Skip over leading spaces */ 346 p = name; 347 while(*p && isspace((unsigned char)*p)) p++; 348 if(!*p) return NULL; 349 q = p + strlen(p) - 1; 350 while((q != p) && isspace((unsigned char)*q)) q--; 351 if(p != q) q[1] = 0; 352 if(!*p) return NULL; 353 return p; 354} 355 356/* hex string utilities */ 357 358/* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its 359 * hex representation 360 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines) 361 */ 362 363char *hex_to_string(unsigned char *buffer, long len) 364{ 365 char *tmp, *q; 366 unsigned char *p; 367 int i; 368 const static char hexdig[] = "0123456789ABCDEF"; 369 if(!buffer || !len) return NULL; 370 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) { 371 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE); 372 return NULL; 373 } 374 q = tmp; 375 for(i = 0, p = buffer; i < len; i++,p++) { 376 *q++ = hexdig[(*p >> 4) & 0xf]; 377 *q++ = hexdig[*p & 0xf]; 378 *q++ = ':'; 379 } 380 q[-1] = 0; 381#ifdef CHARSET_EBCDIC 382 ebcdic2ascii(tmp, tmp, q - tmp - 1); 383#endif 384 385 return tmp; 386} 387 388/* Give a string of hex digits convert to 389 * a buffer 390 */ 391 392unsigned char *string_to_hex(char *str, long *len) 393{ 394 unsigned char *hexbuf, *q; 395 unsigned char ch, cl, *p; 396 if(!str) { 397 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT); 398 return NULL; 399 } 400 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err; 401 for(p = (unsigned char *)str, q = hexbuf; *p;) { 402 ch = *p++; 403#ifdef CHARSET_EBCDIC 404 ch = os_toebcdic[ch]; 405#endif 406 if(ch == ':') continue; 407 cl = *p++; 408#ifdef CHARSET_EBCDIC 409 cl = os_toebcdic[cl]; 410#endif 411 if(!cl) { 412 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS); 413 OPENSSL_free(hexbuf); 414 return NULL; 415 } 416 if(isupper(ch)) ch = tolower(ch); 417 if(isupper(cl)) cl = tolower(cl); 418 419 if((ch >= '0') && (ch <= '9')) ch -= '0'; 420 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10; 421 else goto badhex; 422 423 if((cl >= '0') && (cl <= '9')) cl -= '0'; 424 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10; 425 else goto badhex; 426 427 *q++ = (ch << 4) | cl; 428 } 429 430 if(len) *len = q - hexbuf; 431 432 return hexbuf; 433 434 err: 435 if(hexbuf) OPENSSL_free(hexbuf); 436 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE); 437 return NULL; 438 439 badhex: 440 OPENSSL_free(hexbuf); 441 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT); 442 return NULL; 443 444} 445 446/* V2I name comparison function: returns zero if 'name' matches 447 * cmp or cmp.* 448 */ 449 450int name_cmp(const char *name, const char *cmp) 451{ 452 int len, ret; 453 char c; 454 len = strlen(cmp); 455 if((ret = strncmp(name, cmp, len))) return ret; 456 c = name[len]; 457 if(!c || (c=='.')) return 0; 458 return 1; 459} 460 461static int sk_strcmp(const char * const *a, const char * const *b) 462{ 463 return strcmp(*a, *b); 464} 465 466STACK *X509_get1_email(X509 *x) 467{ 468 GENERAL_NAMES *gens; 469 STACK *ret; 470 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL); 471 ret = get_email(X509_get_subject_name(x), gens); 472 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free); 473 return ret; 474} 475 476STACK *X509_get1_ocsp(X509 *x) 477{ 478 AUTHORITY_INFO_ACCESS *info; 479 STACK *ret = NULL; 480 int i; 481 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL); 482 if (!info) 483 return NULL; 484 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) 485 { 486 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i); 487 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) 488 { 489 if (ad->location->type == GEN_URI) 490 { 491 if (!append_ia5(&ret, ad->location->d.uniformResourceIdentifier)) 492 break; 493 } 494 } 495 } 496 AUTHORITY_INFO_ACCESS_free(info); 497 return ret; 498} 499 500STACK *X509_REQ_get1_email(X509_REQ *x) 501{ 502 GENERAL_NAMES *gens; 503 STACK_OF(X509_EXTENSION) *exts; 504 STACK *ret; 505 exts = X509_REQ_get_extensions(x); 506 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL); 507 ret = get_email(X509_REQ_get_subject_name(x), gens); 508 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free); 509 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free); 510 return ret; 511} 512 513 514static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens) 515{ 516 STACK *ret = NULL; 517 X509_NAME_ENTRY *ne; 518 ASN1_IA5STRING *email; 519 GENERAL_NAME *gen; 520 int i; 521 /* Now add any email address(es) to STACK */ 522 i = -1; 523 /* First supplied X509_NAME */ 524 while((i = X509_NAME_get_index_by_NID(name, 525 NID_pkcs9_emailAddress, i)) >= 0) { 526 ne = X509_NAME_get_entry(name, i); 527 email = X509_NAME_ENTRY_get_data(ne); 528 if(!append_ia5(&ret, email)) return NULL; 529 } 530 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++) 531 { 532 gen = sk_GENERAL_NAME_value(gens, i); 533 if(gen->type != GEN_EMAIL) continue; 534 if(!append_ia5(&ret, gen->d.ia5)) return NULL; 535 } 536 return ret; 537} 538 539static void str_free(void *str) 540{ 541 OPENSSL_free(str); 542} 543 544static int append_ia5(STACK **sk, ASN1_IA5STRING *email) 545{ 546 char *emtmp; 547 /* First some sanity checks */ 548 if(email->type != V_ASN1_IA5STRING) return 1; 549 if(!email->data || !email->length) return 1; 550 if(!*sk) *sk = sk_new(sk_strcmp); 551 if(!*sk) return 0; 552 /* Don't add duplicates */ 553 if(sk_find(*sk, (char *)email->data) != -1) return 1; 554 emtmp = BUF_strdup((char *)email->data); 555 if(!emtmp || !sk_push(*sk, emtmp)) { 556 X509_email_free(*sk); 557 *sk = NULL; 558 return 0; 559 } 560 return 1; 561} 562 563void X509_email_free(STACK *sk) 564{ 565 sk_pop_free(sk, str_free); 566} 567 568/* Convert IP addresses both IPv4 and IPv6 into an 569 * OCTET STRING compatible with RFC3280. 570 */ 571 572ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc) 573 { 574 unsigned char ipout[16]; 575 ASN1_OCTET_STRING *ret; 576 int iplen; 577 578 /* If string contains a ':' assume IPv6 */ 579 580 iplen = a2i_ipadd(ipout, ipasc); 581 582 if (!iplen) 583 return NULL; 584 585 ret = ASN1_OCTET_STRING_new(); 586 if (!ret) 587 return NULL; 588 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) 589 { 590 ASN1_OCTET_STRING_free(ret); 591 return NULL; 592 } 593 return ret; 594 } 595 596ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc) 597 { 598 ASN1_OCTET_STRING *ret = NULL; 599 unsigned char ipout[32]; 600 char *iptmp = NULL, *p; 601 int iplen1, iplen2; 602 p = strchr(ipasc,'/'); 603 if (!p) 604 return NULL; 605 iptmp = BUF_strdup(ipasc); 606 if (!iptmp) 607 return NULL; 608 p = iptmp + (p - ipasc); 609 *p++ = 0; 610 611 iplen1 = a2i_ipadd(ipout, iptmp); 612 613 if (!iplen1) 614 goto err; 615 616 iplen2 = a2i_ipadd(ipout + iplen1, p); 617 618 OPENSSL_free(iptmp); 619 iptmp = NULL; 620 621 if (!iplen2 || (iplen1 != iplen2)) 622 goto err; 623 624 ret = ASN1_OCTET_STRING_new(); 625 if (!ret) 626 goto err; 627 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2)) 628 goto err; 629 630 return ret; 631 632 err: 633 if (iptmp) 634 OPENSSL_free(iptmp); 635 if (ret) 636 ASN1_OCTET_STRING_free(ret); 637 return NULL; 638 } 639 640 641int a2i_ipadd(unsigned char *ipout, const char *ipasc) 642 { 643 /* If string contains a ':' assume IPv6 */ 644 645 if (strchr(ipasc, ':')) 646 { 647 if (!ipv6_from_asc(ipout, ipasc)) 648 return 0; 649 return 16; 650 } 651 else 652 { 653 if (!ipv4_from_asc(ipout, ipasc)) 654 return 0; 655 return 4; 656 } 657 } 658 659static int ipv4_from_asc(unsigned char *v4, const char *in) 660 { 661 int a0, a1, a2, a3; 662 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4) 663 return 0; 664 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255) 665 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255)) 666 return 0; 667 v4[0] = a0; 668 v4[1] = a1; 669 v4[2] = a2; 670 v4[3] = a3; 671 return 1; 672 } 673 674typedef struct { 675 /* Temporary store for IPV6 output */ 676 unsigned char tmp[16]; 677 /* Total number of bytes in tmp */ 678 int total; 679 /* The position of a zero (corresponding to '::') */ 680 int zero_pos; 681 /* Number of zeroes */ 682 int zero_cnt; 683 } IPV6_STAT; 684 685 686static int ipv6_from_asc(unsigned char *v6, const char *in) 687 { 688 IPV6_STAT v6stat; 689 v6stat.total = 0; 690 v6stat.zero_pos = -1; 691 v6stat.zero_cnt = 0; 692 /* Treat the IPv6 representation as a list of values 693 * separated by ':'. The presence of a '::' will parse 694 * as one, two or three zero length elements. 695 */ 696 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat)) 697 return 0; 698 699 /* Now for some sanity checks */ 700 701 if (v6stat.zero_pos == -1) 702 { 703 /* If no '::' must have exactly 16 bytes */ 704 if (v6stat.total != 16) 705 return 0; 706 } 707 else 708 { 709 /* If '::' must have less than 16 bytes */ 710 if (v6stat.total == 16) 711 return 0; 712 /* More than three zeroes is an error */ 713 if (v6stat.zero_cnt > 3) 714 return 0; 715 /* Can only have three zeroes if nothing else present */ 716 else if (v6stat.zero_cnt == 3) 717 { 718 if (v6stat.total > 0) 719 return 0; 720 } 721 /* Can only have two zeroes if at start or end */ 722 else if (v6stat.zero_cnt == 2) 723 { 724 if ((v6stat.zero_pos != 0) 725 && (v6stat.zero_pos != v6stat.total)) 726 return 0; 727 } 728 else 729 /* Can only have one zero if *not* start or end */ 730 { 731 if ((v6stat.zero_pos == 0) 732 || (v6stat.zero_pos == v6stat.total)) 733 return 0; 734 } 735 } 736 737 /* Format result */ 738 739 if (v6stat.zero_pos >= 0) 740 { 741 /* Copy initial part */ 742 memcpy(v6, v6stat.tmp, v6stat.zero_pos); 743 /* Zero middle */ 744 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total); 745 /* Copy final part */ 746 if (v6stat.total != v6stat.zero_pos) 747 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total, 748 v6stat.tmp + v6stat.zero_pos, 749 v6stat.total - v6stat.zero_pos); 750 } 751 else 752 memcpy(v6, v6stat.tmp, 16); 753 754 return 1; 755 } 756 757static int ipv6_cb(const char *elem, int len, void *usr) 758 { 759 IPV6_STAT *s = usr; 760 /* Error if 16 bytes written */ 761 if (s->total == 16) 762 return 0; 763 if (len == 0) 764 { 765 /* Zero length element, corresponds to '::' */ 766 if (s->zero_pos == -1) 767 s->zero_pos = s->total; 768 /* If we've already got a :: its an error */ 769 else if (s->zero_pos != s->total) 770 return 0; 771 s->zero_cnt++; 772 } 773 else 774 { 775 /* If more than 4 characters could be final a.b.c.d form */ 776 if (len > 4) 777 { 778 /* Need at least 4 bytes left */ 779 if (s->total > 12) 780 return 0; 781 /* Must be end of string */ 782 if (elem[len]) 783 return 0; 784 if (!ipv4_from_asc(s->tmp + s->total, elem)) 785 return 0; 786 s->total += 4; 787 } 788 else 789 { 790 if (!ipv6_hex(s->tmp + s->total, elem, len)) 791 return 0; 792 s->total += 2; 793 } 794 } 795 return 1; 796 } 797 798/* Convert a string of up to 4 hex digits into the corresponding 799 * IPv6 form. 800 */ 801 802static int ipv6_hex(unsigned char *out, const char *in, int inlen) 803 { 804 unsigned char c; 805 unsigned int num = 0; 806 if (inlen > 4) 807 return 0; 808 while(inlen--) 809 { 810 c = *in++; 811 num <<= 4; 812 if ((c >= '0') && (c <= '9')) 813 num |= c - '0'; 814 else if ((c >= 'A') && (c <= 'F')) 815 num |= c - 'A' + 10; 816 else if ((c >= 'a') && (c <= 'f')) 817 num |= c - 'a' + 10; 818 else 819 return 0; 820 } 821 out[0] = num >> 8; 822 out[1] = num & 0xff; 823 return 1; 824 } 825 826 827int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk, 828 unsigned long chtype) 829 { 830 CONF_VALUE *v; 831 int i, mval; 832 char *p, *type; 833 if (!nm) 834 return 0; 835 836 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) 837 { 838 v=sk_CONF_VALUE_value(dn_sk,i); 839 type=v->name; 840 /* Skip past any leading X. X: X, etc to allow for 841 * multiple instances 842 */ 843 for(p = type; *p ; p++) 844#ifndef CHARSET_EBCDIC 845 if ((*p == ':') || (*p == ',') || (*p == '.')) 846#else 847 if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.'])) 848#endif 849 { 850 p++; 851 if(*p) type = p; 852 break; 853 } 854#ifndef CHARSET_EBCDIC 855 if (*type == '+') 856#else 857 if (*type == os_toascii['+']) 858#endif 859 { 860 mval = -1; 861 type++; 862 } 863 else 864 mval = 0; 865 if (!X509_NAME_add_entry_by_txt(nm,type, chtype, 866 (unsigned char *) v->value,-1,-1,mval)) 867 return 0; 868 869 } 870 return 1; 871 } 872