crypto/openssl/crypto/x509v3/v3_utl.c

   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
  68 static char *strip_spaces(char *name);
  69 static int sk_strcmp(const char * const *a, const char * const *b);
  70 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
  71 static void str_free(void *str);
  72 static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
  73
  74 static int ipv4_from_asc(unsigned char *v4, const char *in);
  75 static int ipv6_from_asc(unsigned char *v6, const char *in);
  76 static int ipv6_cb(const char *elem, int len, void *usr);
  77 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
  78
  79 /* Add a CONF_VALUE name value pair to stack */
  80
  81 int 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
 103 int 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
 111 void 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
 120 int 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
 127 int 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
 135 char *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
 147 char *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
 159 ASN1_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
 201 int 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
 213 int 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
 234 int 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
 250 STACK_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         }
 331 OPENSSL_free(linebuf);
 332 return values;
 333
 334 err:
 335 OPENSSL_free(linebuf);
 336 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
 337 return NULL;
 338
 339 }
 340
 341 /* Delete leading and trailing spaces from a string */
 342 static 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
 363 char *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
 392 unsigned 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
 450 int 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
 461 static int sk_strcmp(const char * const *a, const char * const *b)
 462 {
 463         return strcmp(*a, *b);
 464 }
 465
 466 STACK *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
 476 STACK *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
 500 STACK *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
 514 static 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
 539 static void str_free(void *str)
 540 {
 541         OPENSSL_free(str);
 542 }
 543
 544 static 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
 563 void 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
 572 ASN1_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
 596 ASN1_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
 641 int 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
 659 static 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
 674 typedef 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
 686 static 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
 757 static 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
 802 static 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
 827 int 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         }