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