2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
58 /* X509 v3 extension utilities */
64 #include <openssl/conf.h>
65 #include <openssl/x509v3.h>
66 #include <openssl/bn.h>
68 static char *strip_spaces(char *name);
69 static int sk_strcmp(const char * const *a, const char * const *b);
70 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens);
71 static void str_free(OPENSSL_STRING str);
72 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
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);
79 /* Add a CONF_VALUE name value pair to stack */
81 int X509V3_add_value(const char *name, const char *value,
82 STACK_OF(CONF_VALUE) **extlist)
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;
93 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto 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);
103 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
104 STACK_OF(CONF_VALUE) **extlist)
106 return X509V3_add_value(name,(const char *)value,extlist);
109 /* Free function for STACK_OF(CONF_VALUE) */
111 void X509V3_conf_free(CONF_VALUE *conf)
114 if(conf->name) OPENSSL_free(conf->name);
115 if(conf->value) OPENSSL_free(conf->value);
116 if(conf->section) OPENSSL_free(conf->section);
120 int X509V3_add_value_bool(const char *name, int asn1_bool,
121 STACK_OF(CONF_VALUE) **extlist)
123 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
124 return X509V3_add_value(name, "FALSE", extlist);
127 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
128 STACK_OF(CONF_VALUE) **extlist)
130 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
135 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
137 BIGNUM *bntmp = 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);
147 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
149 BIGNUM *bntmp = 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);
159 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
166 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
170 if (value[0] == '-') {
175 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
180 if (ishex) ret = BN_hex2bn(&bn, value);
181 else ret = BN_dec2bn(&bn, value);
183 if (!ret || value[ret]) {
185 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
189 if (isneg && BN_is_zero(bn)) isneg = 0;
191 aint = BN_to_ASN1_INTEGER(bn, NULL);
194 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
197 if (isneg) aint->type |= V_ASN1_NEG;
201 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
202 STACK_OF(CONF_VALUE) **extlist)
207 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
208 ret = X509V3_add_value(name, strtmp, extlist);
209 OPENSSL_free(strtmp);
213 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
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")) {
222 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
223 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
224 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
229 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
230 X509V3_conf_err(value);
234 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
237 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
238 X509V3_conf_err(value);
250 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
254 STACK_OF(CONF_VALUE) *values = NULL;
257 /* We are going to modify the line so copy it first */
258 linebuf = BUF_strdup(line);
261 /* Go through all characters */
262 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
269 ntmp = strip_spaces(q);
271 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
275 } else if(c == ',') {
277 ntmp = strip_spaces(q);
280 printf("%s\n", ntmp);
283 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
286 X509V3_add_value(ntmp, NULL, &values);
294 vtmp = strip_spaces(q);
296 printf("%s\n", ntmp);
299 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
302 X509V3_add_value(ntmp, vtmp, &values);
310 if(state == HDR_VALUE) {
311 vtmp = strip_spaces(q);
313 printf("%s=%s\n", ntmp, vtmp);
316 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
319 X509V3_add_value(ntmp, vtmp, &values);
321 ntmp = strip_spaces(q);
323 printf("%s\n", ntmp);
326 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
329 X509V3_add_value(ntmp, NULL, &values);
331 OPENSSL_free(linebuf);
335 OPENSSL_free(linebuf);
336 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
341 /* Delete leading and trailing spaces from a string */
342 static char *strip_spaces(char *name)
345 /* Skip over leading spaces */
347 while(*p && isspace((unsigned char)*p)) p++;
349 q = p + strlen(p) - 1;
350 while((q != p) && isspace((unsigned char)*q)) q--;
356 /* hex string utilities */
358 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
360 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
363 char *hex_to_string(const unsigned char *buffer, long len)
366 const unsigned char *p;
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);
375 for(i = 0, p = buffer; i < len; i++,p++) {
376 *q++ = hexdig[(*p >> 4) & 0xf];
377 *q++ = hexdig[*p & 0xf];
381 #ifdef CHARSET_EBCDIC
382 ebcdic2ascii(tmp, tmp, q - tmp - 1);
388 /* Give a string of hex digits convert to
392 unsigned char *string_to_hex(const char *str, long *len)
394 unsigned char *hexbuf, *q;
395 unsigned char ch, cl, *p;
397 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
400 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
401 for(p = (unsigned char *)str, q = hexbuf; *p;) {
403 #ifdef CHARSET_EBCDIC
404 ch = os_toebcdic[ch];
406 if(ch == ':') continue;
408 #ifdef CHARSET_EBCDIC
409 cl = os_toebcdic[cl];
412 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
413 OPENSSL_free(hexbuf);
416 if(isupper(ch)) ch = tolower(ch);
417 if(isupper(cl)) cl = tolower(cl);
419 if((ch >= '0') && (ch <= '9')) ch -= '0';
420 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
423 if((cl >= '0') && (cl <= '9')) cl -= '0';
424 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
427 *q++ = (ch << 4) | cl;
430 if(len) *len = q - hexbuf;
435 if(hexbuf) OPENSSL_free(hexbuf);
436 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
440 OPENSSL_free(hexbuf);
441 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
446 /* V2I name comparison function: returns zero if 'name' matches
450 int name_cmp(const char *name, const char *cmp)
455 if((ret = strncmp(name, cmp, len))) return ret;
457 if(!c || (c=='.')) return 0;
461 static int sk_strcmp(const char * const *a, const char * const *b)
463 return strcmp(*a, *b);
466 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
469 STACK_OF(OPENSSL_STRING) *ret;
471 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
472 ret = get_email(X509_get_subject_name(x), gens);
473 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
477 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
479 AUTHORITY_INFO_ACCESS *info;
480 STACK_OF(OPENSSL_STRING) *ret = NULL;
483 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
486 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++)
488 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
489 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP)
491 if (ad->location->type == GEN_URI)
493 if (!append_ia5(&ret, ad->location->d.uniformResourceIdentifier))
498 AUTHORITY_INFO_ACCESS_free(info);
502 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
505 STACK_OF(X509_EXTENSION) *exts;
506 STACK_OF(OPENSSL_STRING) *ret;
508 exts = X509_REQ_get_extensions(x);
509 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
510 ret = get_email(X509_REQ_get_subject_name(x), gens);
511 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
512 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
517 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens)
519 STACK_OF(OPENSSL_STRING) *ret = NULL;
521 ASN1_IA5STRING *email;
524 /* Now add any email address(es) to STACK */
526 /* First supplied X509_NAME */
527 while((i = X509_NAME_get_index_by_NID(name,
528 NID_pkcs9_emailAddress, i)) >= 0) {
529 ne = X509_NAME_get_entry(name, i);
530 email = X509_NAME_ENTRY_get_data(ne);
531 if(!append_ia5(&ret, email)) return NULL;
533 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
535 gen = sk_GENERAL_NAME_value(gens, i);
536 if(gen->type != GEN_EMAIL) continue;
537 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
542 static void str_free(OPENSSL_STRING str)
547 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
550 /* First some sanity checks */
551 if(email->type != V_ASN1_IA5STRING) return 1;
552 if(!email->data || !email->length) return 1;
553 if(!*sk) *sk = sk_OPENSSL_STRING_new(sk_strcmp);
555 /* Don't add duplicates */
556 if(sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) return 1;
557 emtmp = BUF_strdup((char *)email->data);
558 if(!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
559 X509_email_free(*sk);
566 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
568 sk_OPENSSL_STRING_pop_free(sk, str_free);
571 typedef int (*equal_fn)(const unsigned char *pattern, size_t pattern_len,
572 const unsigned char *subject, size_t subject_len,
575 /* Skip pattern prefix to match "wildcard" subject */
576 static void skip_prefix(const unsigned char **p, size_t *plen,
577 const unsigned char *subject, size_t subject_len,
580 const unsigned char *pattern = *p;
581 size_t pattern_len = *plen;
584 * If subject starts with a leading '.' followed by more octets, and
585 * pattern is longer, compare just an equal-length suffix with the
586 * full subject (starting at the '.'), provided the prefix contains
589 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
592 while (pattern_len > subject_len && *pattern)
594 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
601 /* Skip if entire prefix acceptable */
602 if (pattern_len == subject_len)
609 /* Compare while ASCII ignoring case. */
610 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
611 const unsigned char *subject, size_t subject_len,
614 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
615 if (pattern_len != subject_len)
619 unsigned char l = *pattern;
620 unsigned char r = *subject;
621 /* The pattern must not contain NUL characters. */
626 if ('A' <= l && l <= 'Z')
628 if ('A' <= r && r <= 'Z')
640 /* Compare using memcmp. */
641 static int equal_case(const unsigned char *pattern, size_t pattern_len,
642 const unsigned char *subject, size_t subject_len,
645 skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
646 if (pattern_len != subject_len)
648 return !memcmp(pattern, subject, pattern_len);
651 /* RFC 5280, section 7.5, requires that only the domain is compared in
652 a case-insensitive manner. */
653 static int equal_email(const unsigned char *a, size_t a_len,
654 const unsigned char *b, size_t b_len,
655 unsigned int unused_flags)
660 /* We search backwards for the '@' character, so that we do
661 not have to deal with quoted local-parts. The domain part
662 is compared in a case-insensitive manner. */
666 if (a[i] == '@' || b[i] == '@')
668 if (!equal_nocase(a + i, a_len - i,
669 b + i, a_len - i, 0))
676 return equal_case(a, i, b, i, 0);
679 /* Compare the prefix and suffix with the subject, and check that the
680 characters in-between are valid. */
681 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
682 const unsigned char *suffix, size_t suffix_len,
683 const unsigned char *subject, size_t subject_len,
686 const unsigned char *wildcard_start;
687 const unsigned char *wildcard_end;
688 const unsigned char *p;
692 if (subject_len < prefix_len + suffix_len)
694 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
696 wildcard_start = subject + prefix_len;
697 wildcard_end = subject + (subject_len - suffix_len);
698 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
701 * If the wildcard makes up the entire first label, it must match at
702 * least one character.
704 if (prefix_len == 0 && *suffix == '.')
706 if (wildcard_start == wildcard_end)
709 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
712 /* IDNA labels cannot match partial wildcards */
714 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
716 /* The wildcard may match a literal '*' */
717 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
720 * Check that the part matched by the wildcard contains only
721 * permitted characters and only matches a single label unless
722 * allow_multi is set.
724 for (p = wildcard_start; p != wildcard_end; ++p)
725 if (!(('0' <= *p && *p <= '9') ||
726 ('A' <= *p && *p <= 'Z') ||
727 ('a' <= *p && *p <= 'z') ||
728 *p == '-' || (allow_multi && *p == '.')))
733 #define LABEL_START (1 << 0)
734 #define LABEL_END (1 << 1)
735 #define LABEL_HYPHEN (1 << 2)
736 #define LABEL_IDNA (1 << 3)
738 static const unsigned char *valid_star(const unsigned char *p, size_t len,
741 const unsigned char *star = 0;
743 int state = LABEL_START;
745 for (i = 0; i < len; ++i)
748 * Locate first and only legal wildcard, either at the start
749 * or end of a non-IDNA first and not final label.
753 int atstart = (state & LABEL_START);
754 int atend = (i == len - 1 || p[i+i] == '.');
756 * At most one wildcard per pattern.
757 * No wildcards in IDNA labels.
758 * No wildcards after the first label.
760 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
762 /* Only full-label '*.example.com' wildcards? */
763 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
764 && (!atstart || !atend))
766 /* No 'foo*bar' wildcards */
767 if (!atstart && !atend)
770 state &= ~LABEL_START;
772 else if ((state & LABEL_START) != 0)
775 * At the start of a label, skip any "xn--" and
776 * remain in the LABEL_START state, but set the
779 if ((state & LABEL_IDNA) == 0 && len - i >= 4
780 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
786 /* Labels must start with a letter or digit */
787 state &= ~LABEL_START;
788 if (('a' <= p[i] && p[i] <= 'z')
789 || ('A' <= p[i] && p[i] <= 'Z')
790 || ('0' <= p[i] && p[i] <= '9'))
794 else if (('a' <= p[i] && p[i] <= 'z')
795 || ('A' <= p[i] && p[i] <= 'Z')
796 || ('0' <= p[i] && p[i] <= '9'))
801 else if (p[i] == '.')
803 if (state & (LABEL_HYPHEN | LABEL_START))
808 else if (p[i] == '-')
810 if (state & LABEL_HYPHEN)
812 state |= LABEL_HYPHEN;
819 * The final label must not end in a hyphen or ".", and
820 * there must be at least two dots after the star.
822 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0
828 /* Compare using wildcards. */
829 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
830 const unsigned char *subject, size_t subject_len,
833 const unsigned char *star = NULL;
836 * Subject names starting with '.' can only match a wildcard pattern
837 * via a subject sub-domain pattern suffix match.
839 if (!(subject_len > 1 && subject[0] == '.'))
840 star = valid_star(pattern, pattern_len, flags);
842 return equal_nocase(pattern, pattern_len,
843 subject, subject_len, flags);
844 return wildcard_match(pattern, star - pattern,
845 star + 1, (pattern + pattern_len) - star - 1,
846 subject, subject_len, flags);
849 /* Compare an ASN1_STRING to a supplied string. If they match
850 * return 1. If cmp_type > 0 only compare if string matches the
851 * type, otherwise convert it to UTF8.
854 static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
855 unsigned int flags, const char *b, size_t blen,
860 if (!a->data || !a->length)
864 if (cmp_type != a->type)
866 if (cmp_type == V_ASN1_IA5STRING)
867 rv = equal(a->data, a->length,
868 (unsigned char *)b, blen, flags);
869 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
871 if (rv > 0 && peername)
872 *peername = BUF_strndup((char *)a->data, a->length);
878 astrlen = ASN1_STRING_to_UTF8(&astr, a);
881 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
882 if (rv > 0 && peername)
883 *peername = BUF_strndup((char *)astr, astrlen);
889 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
890 unsigned int flags, int check_type,
893 GENERAL_NAMES *gens = NULL;
894 X509_NAME *name = NULL;
902 /* See below, this flag is internal-only */
903 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
904 if (check_type == GEN_EMAIL)
906 cnid = NID_pkcs9_emailAddress;
907 alt_type = V_ASN1_IA5STRING;
910 else if (check_type == GEN_DNS)
912 cnid = NID_commonName;
913 /* Implicit client-side DNS sub-domain pattern */
914 if (chklen > 1 && chk[0] == '.')
915 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
916 alt_type = V_ASN1_IA5STRING;
917 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
918 equal = equal_nocase;
920 equal = equal_wildcard;
925 alt_type = V_ASN1_OCTET_STRING;
930 chklen = strlen(chk);
932 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
935 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
939 gen = sk_GENERAL_NAME_value(gens, i);
940 if (gen->type != check_type)
943 if (check_type == GEN_EMAIL)
944 cstr = gen->d.rfc822Name;
945 else if (check_type == GEN_DNS)
946 cstr = gen->d.dNSName;
948 cstr = gen->d.iPAddress;
949 /* Positive on success, negative on error! */
950 if ((rv = do_check_string(cstr, alt_type, equal, flags,
951 chk, chklen, peername)) != 0)
954 GENERAL_NAMES_free(gens);
959 && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
963 name = X509_get_subject_name(x);
964 while((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0)
968 ne = X509_NAME_get_entry(name, i);
969 str = X509_NAME_ENTRY_get_data(ne);
970 /* Positive on success, negative on error! */
971 if ((rv = do_check_string(str, -1, equal, flags,
972 chk, chklen, peername)) != 0)
978 int X509_check_host(X509 *x, const char *chk, size_t chklen,
979 unsigned int flags, char **peername)
984 * Embedded NULs are disallowed, except as the last character of a
985 * string of length 2 or more (tolerate caller including terminating
986 * NUL in string length).
989 chklen = strlen(chk);
990 else if (memchr(chk, '\0', chklen > 1 ? chklen-1 : chklen))
992 if (chklen > 1 && chk[chklen-1] == '\0')
994 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
997 int X509_check_email(X509 *x, const char *chk, size_t chklen,
1003 * Embedded NULs are disallowed, except as the last character of a
1004 * string of length 2 or more (tolerate caller including terminating
1005 * NUL in string length).
1008 chklen = strlen((char *)chk);
1009 else if (memchr(chk, '\0', chklen > 1 ? chklen-1 : chklen))
1011 if (chklen > 1 && chk[chklen-1] == '\0')
1013 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1016 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1021 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1024 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1026 unsigned char ipout[16];
1031 iplen = (size_t) a2i_ipadd(ipout, ipasc);
1034 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1037 /* Convert IP addresses both IPv4 and IPv6 into an
1038 * OCTET STRING compatible with RFC3280.
1041 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1043 unsigned char ipout[16];
1044 ASN1_OCTET_STRING *ret;
1047 /* If string contains a ':' assume IPv6 */
1049 iplen = a2i_ipadd(ipout, ipasc);
1054 ret = ASN1_OCTET_STRING_new();
1057 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
1059 ASN1_OCTET_STRING_free(ret);
1065 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1067 ASN1_OCTET_STRING *ret = NULL;
1068 unsigned char ipout[32];
1069 char *iptmp = NULL, *p;
1071 p = strchr(ipasc,'/');
1074 iptmp = BUF_strdup(ipasc);
1077 p = iptmp + (p - ipasc);
1080 iplen1 = a2i_ipadd(ipout, iptmp);
1085 iplen2 = a2i_ipadd(ipout + iplen1, p);
1087 OPENSSL_free(iptmp);
1090 if (!iplen2 || (iplen1 != iplen2))
1093 ret = ASN1_OCTET_STRING_new();
1096 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1103 OPENSSL_free(iptmp);
1105 ASN1_OCTET_STRING_free(ret);
1110 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1112 /* If string contains a ':' assume IPv6 */
1114 if (strchr(ipasc, ':'))
1116 if (!ipv6_from_asc(ipout, ipasc))
1122 if (!ipv4_from_asc(ipout, ipasc))
1128 static int ipv4_from_asc(unsigned char *v4, const char *in)
1131 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1133 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1134 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1144 /* Temporary store for IPV6 output */
1145 unsigned char tmp[16];
1146 /* Total number of bytes in tmp */
1148 /* The position of a zero (corresponding to '::') */
1150 /* Number of zeroes */
1155 static int ipv6_from_asc(unsigned char *v6, const char *in)
1159 v6stat.zero_pos = -1;
1160 v6stat.zero_cnt = 0;
1161 /* Treat the IPv6 representation as a list of values
1162 * separated by ':'. The presence of a '::' will parse
1163 * as one, two or three zero length elements.
1165 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1168 /* Now for some sanity checks */
1170 if (v6stat.zero_pos == -1)
1172 /* If no '::' must have exactly 16 bytes */
1173 if (v6stat.total != 16)
1178 /* If '::' must have less than 16 bytes */
1179 if (v6stat.total == 16)
1181 /* More than three zeroes is an error */
1182 if (v6stat.zero_cnt > 3)
1184 /* Can only have three zeroes if nothing else present */
1185 else if (v6stat.zero_cnt == 3)
1187 if (v6stat.total > 0)
1190 /* Can only have two zeroes if at start or end */
1191 else if (v6stat.zero_cnt == 2)
1193 if ((v6stat.zero_pos != 0)
1194 && (v6stat.zero_pos != v6stat.total))
1198 /* Can only have one zero if *not* start or end */
1200 if ((v6stat.zero_pos == 0)
1201 || (v6stat.zero_pos == v6stat.total))
1208 if (v6stat.zero_pos >= 0)
1210 /* Copy initial part */
1211 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1213 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1214 /* Copy final part */
1215 if (v6stat.total != v6stat.zero_pos)
1216 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1217 v6stat.tmp + v6stat.zero_pos,
1218 v6stat.total - v6stat.zero_pos);
1221 memcpy(v6, v6stat.tmp, 16);
1226 static int ipv6_cb(const char *elem, int len, void *usr)
1229 /* Error if 16 bytes written */
1234 /* Zero length element, corresponds to '::' */
1235 if (s->zero_pos == -1)
1236 s->zero_pos = s->total;
1237 /* If we've already got a :: its an error */
1238 else if (s->zero_pos != s->total)
1244 /* If more than 4 characters could be final a.b.c.d form */
1247 /* Need at least 4 bytes left */
1250 /* Must be end of string */
1253 if (!ipv4_from_asc(s->tmp + s->total, elem))
1259 if (!ipv6_hex(s->tmp + s->total, elem, len))
1267 /* Convert a string of up to 4 hex digits into the corresponding
1271 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1274 unsigned int num = 0;
1281 if ((c >= '0') && (c <= '9'))
1283 else if ((c >= 'A') && (c <= 'F'))
1284 num |= c - 'A' + 10;
1285 else if ((c >= 'a') && (c <= 'f'))
1286 num |= c - 'a' + 10;
1291 out[1] = num & 0xff;
1296 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
1297 unsigned long chtype)
1305 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
1307 v=sk_CONF_VALUE_value(dn_sk,i);
1309 /* Skip past any leading X. X: X, etc to allow for
1310 * multiple instances
1312 for(p = type; *p ; p++)
1313 #ifndef CHARSET_EBCDIC
1314 if ((*p == ':') || (*p == ',') || (*p == '.'))
1316 if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
1323 #ifndef CHARSET_EBCDIC
1326 if (*type == os_toascii['+'])
1334 if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
1335 (unsigned char *) v->value,-1,-1,mval))