crypto/openssl-0.9.7d/crypto/x509v3/v3_utl.c

   1 /* v3_utl.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 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
  67 static char *strip_spaces(char *name);
  68 static int sk_strcmp(const char * const *a, const char * const *b);
  69 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
  70 static void str_free(void *str);
  71 static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
  72
  73 /* Add a CONF_VALUE name value pair to stack */
  74
  75 int X509V3_add_value(const char *name, const char *value,
  76                                                 STACK_OF(CONF_VALUE) **extlist)
  77 {
  78         CONF_VALUE *vtmp = NULL;
  79         char *tname = NULL, *tvalue = NULL;
  80         if(name && !(tname = BUF_strdup(name))) goto err;
  81         if(value && !(tvalue = BUF_strdup(value))) goto err;;
  82         if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
  83         if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
  84         vtmp->section = NULL;
  85         vtmp->name = tname;
  86         vtmp->value = tvalue;
  87         if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
  88         return 1;
  89         err:
  90         X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
  91         if(vtmp) OPENSSL_free(vtmp);
  92         if(tname) OPENSSL_free(tname);
  93         if(tvalue) OPENSSL_free(tvalue);
  94         return 0;
  95 }
  96
  97 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
  98                            STACK_OF(CONF_VALUE) **extlist)
  99     {
 100     return X509V3_add_value(name,(const char *)value,extlist);
 101     }
 102
 103 /* Free function for STACK_OF(CONF_VALUE) */
 104
 105 void X509V3_conf_free(CONF_VALUE *conf)
 106 {
 107         if(!conf) return;
 108         if(conf->name) OPENSSL_free(conf->name);
 109         if(conf->value) OPENSSL_free(conf->value);
 110         if(conf->section) OPENSSL_free(conf->section);
 111         OPENSSL_free(conf);
 112 }
 113
 114 int X509V3_add_value_bool(const char *name, int asn1_bool,
 115                                                 STACK_OF(CONF_VALUE) **extlist)
 116 {
 117         if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
 118         return X509V3_add_value(name, "FALSE", extlist);
 119 }
 120
 121 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
 122                                                 STACK_OF(CONF_VALUE) **extlist)
 123 {
 124         if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
 125         return 1;
 126 }
 127
 128
 129 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
 130 {
 131         BIGNUM *bntmp = NULL;
 132         char *strtmp = NULL;
 133         if(!a) return NULL;
 134         if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
 135             !(strtmp = BN_bn2dec(bntmp)) )
 136                 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
 137         BN_free(bntmp);
 138         return strtmp;
 139 }
 140
 141 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
 142 {
 143         BIGNUM *bntmp = NULL;
 144         char *strtmp = NULL;
 145         if(!a) return NULL;
 146         if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
 147             !(strtmp = BN_bn2dec(bntmp)) )
 148                 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
 149         BN_free(bntmp);
 150         return strtmp;
 151 }
 152
 153 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
 154 {
 155         BIGNUM *bn = NULL;
 156         ASN1_INTEGER *aint;
 157         int isneg, ishex;
 158         int ret;
 159         bn = BN_new();
 160         if (!value) {
 161                 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
 162                 return 0;
 163         }
 164         if (value[0] == '-') {
 165                 value++;
 166                 isneg = 1;
 167         } else isneg = 0;
 168
 169         if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
 170                 value += 2;
 171                 ishex = 1;
 172         } else ishex = 0;
 173
 174         if (ishex) ret = BN_hex2bn(&bn, value);
 175         else ret = BN_dec2bn(&bn, value);
 176
 177         if (!ret) {
 178                 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
 179                 return 0;
 180         }
 181
 182         if (isneg && BN_is_zero(bn)) isneg = 0;
 183
 184         aint = BN_to_ASN1_INTEGER(bn, NULL);
 185         BN_free(bn);
 186         if (!aint) {
 187                 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
 188                 return 0;
 189         }
 190         if (isneg) aint->type |= V_ASN1_NEG;
 191         return aint;
 192 }
 193
 194 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
 195              STACK_OF(CONF_VALUE) **extlist)
 196 {
 197         char *strtmp;
 198         int ret;
 199         if(!aint) return 1;
 200         if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
 201         ret = X509V3_add_value(name, strtmp, extlist);
 202         OPENSSL_free(strtmp);
 203         return ret;
 204 }
 205
 206 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
 207 {
 208         char *btmp;
 209         if(!(btmp = value->value)) goto err;
 210         if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
 211                  || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
 212                 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
 213                 *asn1_bool = 0xff;
 214                 return 1;
 215         } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
 216                  || !strcmp(btmp, "N") || !strcmp(btmp, "n")
 217                 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
 218                 *asn1_bool = 0;
 219                 return 1;
 220         }
 221         err:
 222         X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
 223         X509V3_conf_err(value);
 224         return 0;
 225 }
 226
 227 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
 228 {
 229         ASN1_INTEGER *itmp;
 230         if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
 231                 X509V3_conf_err(value);
 232                 return 0;
 233         }
 234         *aint = itmp;
 235         return 1;
 236 }
 237
 238 #define HDR_NAME        1
 239 #define HDR_VALUE       2
 240
 241 /*#define DEBUG*/
 242
 243 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
 244 {
 245         char *p, *q, c;
 246         char *ntmp, *vtmp;
 247         STACK_OF(CONF_VALUE) *values = NULL;
 248         char *linebuf;
 249         int state;
 250         /* We are going to modify the line so copy it first */
 251         linebuf = BUF_strdup(line);
 252         state = HDR_NAME;
 253         ntmp = NULL;
 254         /* Go through all characters */
 255         for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
 256
 257                 switch(state) {
 258                         case HDR_NAME:
 259                         if(c == ':') {
 260                                 state = HDR_VALUE;
 261                                 *p = 0;
 262                                 ntmp = strip_spaces(q);
 263                                 if(!ntmp) {
 264                                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
 265                                         goto err;
 266                                 }
 267                                 q = p + 1;
 268                         } else if(c == ',') {
 269                                 *p = 0;
 270                                 ntmp = strip_spaces(q);
 271                                 q = p + 1;
 272 #if 0
 273                                 printf("%s\n", ntmp);
 274 #endif
 275                                 if(!ntmp) {
 276                                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
 277                                         goto err;
 278                                 }
 279                                 X509V3_add_value(ntmp, NULL, &values);
 280                         }
 281                         break ;
 282
 283                         case HDR_VALUE:
 284                         if(c == ',') {
 285                                 state = HDR_NAME;
 286                                 *p = 0;
 287                                 vtmp = strip_spaces(q);
 288 #if 0
 289                                 printf("%s\n", ntmp);
 290 #endif
 291                                 if(!vtmp) {
 292                                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
 293                                         goto err;
 294                                 }
 295                                 X509V3_add_value(ntmp, vtmp, &values);
 296                                 ntmp = NULL;
 297                                 q = p + 1;
 298                         }
 299
 300                 }
 301         }
 302
 303         if(state == HDR_VALUE) {
 304                 vtmp = strip_spaces(q);
 305 #if 0
 306                 printf("%s=%s\n", ntmp, vtmp);
 307 #endif
 308                 if(!vtmp) {
 309                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
 310                         goto err;
 311                 }
 312                 X509V3_add_value(ntmp, vtmp, &values);
 313         } else {
 314                 ntmp = strip_spaces(q);
 315 #if 0
 316                 printf("%s\n", ntmp);
 317 #endif
 318                 if(!ntmp) {
 319                         X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
 320                         goto err;
 321                 }
 322                 X509V3_add_value(ntmp, NULL, &values);
 323         }
 324 OPENSSL_free(linebuf);
 325 return values;
 326
 327 err:
 328 OPENSSL_free(linebuf);
 329 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
 330 return NULL;
 331
 332 }
 333
 334 /* Delete leading and trailing spaces from a string */
 335 static char *strip_spaces(char *name)
 336 {
 337         char *p, *q;
 338         /* Skip over leading spaces */
 339         p = name;
 340         while(*p && isspace((unsigned char)*p)) p++;
 341         if(!*p) return NULL;
 342         q = p + strlen(p) - 1;
 343         while((q != p) && isspace((unsigned char)*q)) q--;
 344         if(p != q) q[1] = 0;
 345         if(!*p) return NULL;
 346         return p;
 347 }
 348
 349 /* hex string utilities */
 350
 351 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
 352  * hex representation
 353  * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
 354  */
 355
 356 char *hex_to_string(unsigned char *buffer, long len)
 357 {
 358         char *tmp, *q;
 359         unsigned char *p;
 360         int i;
 361         static char hexdig[] = "0123456789ABCDEF";
 362         if(!buffer || !len) return NULL;
 363         if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
 364                 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
 365                 return NULL;
 366         }
 367         q = tmp;
 368         for(i = 0, p = buffer; i < len; i++,p++) {
 369                 *q++ = hexdig[(*p >> 4) & 0xf];
 370                 *q++ = hexdig[*p & 0xf];
 371                 *q++ = ':';
 372         }
 373         q[-1] = 0;
 374 #ifdef CHARSET_EBCDIC
 375         ebcdic2ascii(tmp, tmp, q - tmp - 1);
 376 #endif
 377
 378         return tmp;
 379 }
 380
 381 /* Give a string of hex digits convert to
 382  * a buffer
 383  */
 384
 385 unsigned char *string_to_hex(char *str, long *len)
 386 {
 387         unsigned char *hexbuf, *q;
 388         unsigned char ch, cl, *p;
 389         if(!str) {
 390                 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
 391                 return NULL;
 392         }
 393         if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
 394         for(p = (unsigned char *)str, q = hexbuf; *p;) {
 395                 ch = *p++;
 396 #ifdef CHARSET_EBCDIC
 397                 ch = os_toebcdic[ch];
 398 #endif
 399                 if(ch == ':') continue;
 400                 cl = *p++;
 401 #ifdef CHARSET_EBCDIC
 402                 cl = os_toebcdic[cl];
 403 #endif
 404                 if(!cl) {
 405                         X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
 406                         OPENSSL_free(hexbuf);
 407                         return NULL;
 408                 }
 409                 if(isupper(ch)) ch = tolower(ch);
 410                 if(isupper(cl)) cl = tolower(cl);
 411
 412                 if((ch >= '0') && (ch <= '9')) ch -= '0';
 413                 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
 414                 else goto badhex;
 415
 416                 if((cl >= '0') && (cl <= '9')) cl -= '0';
 417                 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
 418                 else goto badhex;
 419
 420                 *q++ = (ch << 4) | cl;
 421         }
 422
 423         if(len) *len = q - hexbuf;
 424
 425         return hexbuf;
 426
 427         err:
 428         if(hexbuf) OPENSSL_free(hexbuf);
 429         X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
 430         return NULL;
 431
 432         badhex:
 433         OPENSSL_free(hexbuf);
 434         X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
 435         return NULL;
 436
 437 }
 438
 439 /* V2I name comparison function: returns zero if 'name' matches
 440  * cmp or cmp.*
 441  */
 442
 443 int name_cmp(const char *name, const char *cmp)
 444 {
 445         int len, ret;
 446         char c;
 447         len = strlen(cmp);
 448         if((ret = strncmp(name, cmp, len))) return ret;
 449         c = name[len];
 450         if(!c || (c=='.')) return 0;
 451         return 1;
 452 }
 453
 454 static int sk_strcmp(const char * const *a, const char * const *b)
 455 {
 456         return strcmp(*a, *b);
 457 }
 458
 459 STACK *X509_get1_email(X509 *x)
 460 {
 461         GENERAL_NAMES *gens;
 462         STACK *ret;
 463         gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
 464         ret = get_email(X509_get_subject_name(x), gens);
 465         sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 466         return ret;
 467 }
 468
 469 STACK *X509_REQ_get1_email(X509_REQ *x)
 470 {
 471         GENERAL_NAMES *gens;
 472         STACK_OF(X509_EXTENSION) *exts;
 473         STACK *ret;
 474         exts = X509_REQ_get_extensions(x);
 475         gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
 476         ret = get_email(X509_REQ_get_subject_name(x), gens);
 477         sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 478         sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
 479         return ret;
 480 }
 481
 482
 483 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
 484 {
 485         STACK *ret = NULL;
 486         X509_NAME_ENTRY *ne;
 487         ASN1_IA5STRING *email;
 488         GENERAL_NAME *gen;
 489         int i;
 490         /* Now add any email address(es) to STACK */
 491         i = -1;
 492         /* First supplied X509_NAME */
 493         while((i = X509_NAME_get_index_by_NID(name,
 494                                          NID_pkcs9_emailAddress, i)) >= 0) {
 495                 ne = X509_NAME_get_entry(name, i);
 496                 email = X509_NAME_ENTRY_get_data(ne);
 497                 if(!append_ia5(&ret, email)) return NULL;
 498         }
 499         for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
 500         {
 501                 gen = sk_GENERAL_NAME_value(gens, i);
 502                 if(gen->type != GEN_EMAIL) continue;
 503                 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
 504         }
 505         return ret;
 506 }
 507
 508 static void str_free(void *str)
 509 {
 510         OPENSSL_free(str);
 511 }
 512
 513 static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
 514 {
 515         char *emtmp;
 516         /* First some sanity checks */
 517         if(email->type != V_ASN1_IA5STRING) return 1;
 518         if(!email->data || !email->length) return 1;
 519         if(!*sk) *sk = sk_new(sk_strcmp);
 520         if(!*sk) return 0;
 521         /* Don't add duplicates */
 522         if(sk_find(*sk, (char *)email->data) != -1) return 1;
 523         emtmp = BUF_strdup((char *)email->data);
 524         if(!emtmp || !sk_push(*sk, emtmp)) {
 525                 X509_email_free(*sk);
 526                 *sk = NULL;
 527                 return 0;
 528         }
 529         return 1;
 530 }
 531
 532 void X509_email_free(STACK *sk)
 533 {
 534         sk_pop_free(sk, str_free);
 535 }