2 * Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* X509 v3 extension utilities */
13 #include "internal/cryptlib.h"
15 #include "crypto/ctype.h"
16 #include <openssl/conf.h>
17 #include <openssl/crypto.h>
18 #include <openssl/x509v3.h>
19 #include "crypto/x509.h"
20 #include <openssl/bn.h>
22 #include "x509_local.h"
24 static char *strip_spaces(char *name);
25 static int sk_strcmp(const char *const *a, const char *const *b);
26 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
28 static void str_free(OPENSSL_STRING str);
29 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk,
30 const ASN1_IA5STRING *email);
32 static int ipv4_from_asc(unsigned char *v4, const char *in);
33 static int ipv6_from_asc(unsigned char *v6, const char *in);
34 static int ipv6_cb(const char *elem, int len, void *usr);
35 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
37 /* Add a CONF_VALUE name value pair to stack */
39 int X509V3_add_value(const char *name, const char *value,
40 STACK_OF(CONF_VALUE) **extlist)
42 CONF_VALUE *vtmp = NULL;
43 char *tname = NULL, *tvalue = NULL;
44 int sk_allocated = (*extlist == NULL);
46 if (name && (tname = OPENSSL_strdup(name)) == NULL)
48 if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
50 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
52 if (sk_allocated && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
57 if (!sk_CONF_VALUE_push(*extlist, vtmp))
61 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
63 sk_CONF_VALUE_free(*extlist);
72 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
73 STACK_OF(CONF_VALUE) **extlist)
75 return X509V3_add_value(name, (const char *)value, extlist);
78 /* Free function for STACK_OF(CONF_VALUE) */
80 void X509V3_conf_free(CONF_VALUE *conf)
84 OPENSSL_free(conf->name);
85 OPENSSL_free(conf->value);
86 OPENSSL_free(conf->section);
90 int X509V3_add_value_bool(const char *name, int asn1_bool,
91 STACK_OF(CONF_VALUE) **extlist)
94 return X509V3_add_value(name, "TRUE", extlist);
95 return X509V3_add_value(name, "FALSE", extlist);
98 int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
99 STACK_OF(CONF_VALUE) **extlist)
102 return X509V3_add_value(name, "TRUE", extlist);
106 static char *bignum_to_string(const BIGNUM *bn)
112 * Display large numbers in hex and small numbers in decimal. Converting to
113 * decimal takes quadratic time and is no more useful than hex for large
116 if (BN_num_bits(bn) < 128)
117 return BN_bn2dec(bn);
123 len = strlen(tmp) + 3;
124 ret = OPENSSL_malloc(len);
126 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
131 /* Prepend "0x", but place it after the "-" if negative. */
133 OPENSSL_strlcpy(ret, "-0x", len);
134 OPENSSL_strlcat(ret, tmp + 1, len);
136 OPENSSL_strlcpy(ret, "0x", len);
137 OPENSSL_strlcat(ret, tmp, len);
143 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
145 BIGNUM *bntmp = NULL;
150 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
151 || (strtmp = bignum_to_string(bntmp)) == NULL)
152 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
157 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
159 BIGNUM *bntmp = NULL;
164 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
165 || (strtmp = bignum_to_string(bntmp)) == NULL)
166 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
171 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
179 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_VALUE);
184 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
187 if (value[0] == '-') {
194 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
202 ret = BN_hex2bn(&bn, value);
204 ret = BN_dec2bn(&bn, value);
206 if (!ret || value[ret]) {
208 ERR_raise(ERR_LIB_X509V3, X509V3_R_BN_DEC2BN_ERROR);
212 if (isneg && BN_is_zero(bn))
215 aint = BN_to_ASN1_INTEGER(bn, NULL);
218 ERR_raise(ERR_LIB_X509V3, X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
222 aint->type |= V_ASN1_NEG;
226 int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
227 STACK_OF(CONF_VALUE) **extlist)
234 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
236 ret = X509V3_add_value(name, strtmp, extlist);
237 OPENSSL_free(strtmp);
241 int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
245 if ((btmp = value->value) == NULL)
247 if (strcmp(btmp, "TRUE") == 0
248 || strcmp(btmp, "true") == 0
249 || strcmp(btmp, "Y") == 0
250 || strcmp(btmp, "y") == 0
251 || strcmp(btmp, "YES") == 0
252 || strcmp(btmp, "yes") == 0) {
256 if (strcmp(btmp, "FALSE") == 0
257 || strcmp(btmp, "false") == 0
258 || strcmp(btmp, "N") == 0
259 || strcmp(btmp, "n") == 0
260 || strcmp(btmp, "NO") == 0
261 || strcmp(btmp, "no") == 0) {
266 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_BOOLEAN_STRING);
267 X509V3_conf_add_error_name_value(value);
271 int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
275 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
276 X509V3_conf_add_error_name_value(value);
290 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
294 STACK_OF(CONF_VALUE) *values = NULL;
298 /* We are going to modify the line so copy it first */
299 linebuf = OPENSSL_strdup(line);
300 if (linebuf == NULL) {
301 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
306 /* Go through all characters */
307 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
315 ntmp = strip_spaces(q);
317 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_EMPTY_NAME);
321 } else if (c == ',') {
323 ntmp = strip_spaces(q);
326 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_EMPTY_NAME);
329 X509V3_add_value(ntmp, NULL, &values);
337 vtmp = strip_spaces(q);
339 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_VALUE);
342 X509V3_add_value(ntmp, vtmp, &values);
350 if (state == HDR_VALUE) {
351 vtmp = strip_spaces(q);
353 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_VALUE);
356 X509V3_add_value(ntmp, vtmp, &values);
358 ntmp = strip_spaces(q);
360 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_EMPTY_NAME);
363 X509V3_add_value(ntmp, NULL, &values);
365 OPENSSL_free(linebuf);
369 OPENSSL_free(linebuf);
370 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
375 /* Delete leading and trailing spaces from a string */
376 static char *strip_spaces(char *name)
380 /* Skip over leading spaces */
382 while (*p && ossl_isspace(*p))
386 q = p + strlen(p) - 1;
387 while ((q != p) && ossl_isspace(*q))
398 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
401 int v3_name_cmp(const char *name, const char *cmp)
407 if ((ret = strncmp(name, cmp, len)))
410 if (!c || (c == '.'))
415 static int sk_strcmp(const char *const *a, const char *const *b)
417 return strcmp(*a, *b);
420 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
423 STACK_OF(OPENSSL_STRING) *ret;
425 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
426 ret = get_email(X509_get_subject_name(x), gens);
427 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
431 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
433 AUTHORITY_INFO_ACCESS *info;
434 STACK_OF(OPENSSL_STRING) *ret = NULL;
437 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
440 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
441 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
442 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
443 if (ad->location->type == GEN_URI) {
445 (&ret, ad->location->d.uniformResourceIdentifier))
450 AUTHORITY_INFO_ACCESS_free(info);
454 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
457 STACK_OF(X509_EXTENSION) *exts;
458 STACK_OF(OPENSSL_STRING) *ret;
460 exts = X509_REQ_get_extensions(x);
461 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
462 ret = get_email(X509_REQ_get_subject_name(x), gens);
463 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
464 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
468 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
471 STACK_OF(OPENSSL_STRING) *ret = NULL;
473 const ASN1_IA5STRING *email;
477 /* Now add any email address(es) to STACK */
478 /* First supplied X509_NAME */
479 while ((i = X509_NAME_get_index_by_NID(name,
480 NID_pkcs9_emailAddress, i)) >= 0) {
481 ne = X509_NAME_get_entry(name, i);
482 email = X509_NAME_ENTRY_get_data(ne);
483 if (!append_ia5(&ret, email))
486 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
487 gen = sk_GENERAL_NAME_value(gens, i);
488 if (gen->type != GEN_EMAIL)
490 if (!append_ia5(&ret, gen->d.ia5))
496 static void str_free(OPENSSL_STRING str)
501 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk,
502 const ASN1_IA5STRING *email)
506 /* First some sanity checks */
507 if (email->type != V_ASN1_IA5STRING)
509 if (!email->data || !email->length)
512 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
515 /* Don't add duplicates */
516 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
518 emtmp = OPENSSL_strdup((char *)email->data);
519 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
520 OPENSSL_free(emtmp); /* free on push failure */
521 X509_email_free(*sk);
528 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
530 sk_OPENSSL_STRING_pop_free(sk, str_free);
533 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
534 const unsigned char *subject, size_t subject_len,
537 /* Skip pattern prefix to match "wildcard" subject */
538 static void skip_prefix(const unsigned char **p, size_t *plen,
542 const unsigned char *pattern = *p;
543 size_t pattern_len = *plen;
546 * If subject starts with a leading '.' followed by more octets, and
547 * pattern is longer, compare just an equal-length suffix with the
548 * full subject (starting at the '.'), provided the prefix contains
551 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
554 while (pattern_len > subject_len && *pattern) {
555 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
562 /* Skip if entire prefix acceptable */
563 if (pattern_len == subject_len) {
569 /* Compare while ASCII ignoring case. */
570 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
571 const unsigned char *subject, size_t subject_len,
574 skip_prefix(&pattern, &pattern_len, subject_len, flags);
575 if (pattern_len != subject_len)
577 while (pattern_len != 0) {
578 unsigned char l = *pattern;
579 unsigned char r = *subject;
581 /* The pattern must not contain NUL characters. */
585 if ('A' <= l && l <= 'Z')
587 if ('A' <= r && r <= 'Z')
599 /* Compare using memcmp. */
600 static int equal_case(const unsigned char *pattern, size_t pattern_len,
601 const unsigned char *subject, size_t subject_len,
604 skip_prefix(&pattern, &pattern_len, subject_len, flags);
605 if (pattern_len != subject_len)
607 return !memcmp(pattern, subject, pattern_len);
611 * RFC 5280, section 7.5, requires that only the domain is compared in a
612 * case-insensitive manner.
614 static int equal_email(const unsigned char *a, size_t a_len,
615 const unsigned char *b, size_t b_len,
616 unsigned int unused_flags)
623 * We search backwards for the '@' character, so that we do not have to
624 * deal with quoted local-parts. The domain part is compared in a
625 * case-insensitive manner.
629 if (a[i] == '@' || b[i] == '@') {
630 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
637 return equal_case(a, i, b, i, 0);
641 * Compare the prefix and suffix with the subject, and check that the
642 * characters in-between are valid.
644 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
645 const unsigned char *suffix, size_t suffix_len,
646 const unsigned char *subject, size_t subject_len,
649 const unsigned char *wildcard_start;
650 const unsigned char *wildcard_end;
651 const unsigned char *p;
655 if (subject_len < prefix_len + suffix_len)
657 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
659 wildcard_start = subject + prefix_len;
660 wildcard_end = subject + (subject_len - suffix_len);
661 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
664 * If the wildcard makes up the entire first label, it must match at
665 * least one character.
667 if (prefix_len == 0 && *suffix == '.') {
668 if (wildcard_start == wildcard_end)
671 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
674 /* IDNA labels cannot match partial wildcards */
676 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
678 /* The wildcard may match a literal '*' */
679 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
682 * Check that the part matched by the wildcard contains only
683 * permitted characters and only matches a single label unless
684 * allow_multi is set.
686 for (p = wildcard_start; p != wildcard_end; ++p)
687 if (!(('0' <= *p && *p <= '9') ||
688 ('A' <= *p && *p <= 'Z') ||
689 ('a' <= *p && *p <= 'z') ||
690 *p == '-' || (allow_multi && *p == '.')))
695 #define LABEL_START (1 << 0)
696 #define LABEL_END (1 << 1)
697 #define LABEL_HYPHEN (1 << 2)
698 #define LABEL_IDNA (1 << 3)
700 static const unsigned char *valid_star(const unsigned char *p, size_t len,
703 const unsigned char *star = 0;
705 int state = LABEL_START;
708 for (i = 0; i < len; ++i) {
710 * Locate first and only legal wildcard, either at the start
711 * or end of a non-IDNA first and not final label.
714 int atstart = (state & LABEL_START);
715 int atend = (i == len - 1 || p[i + 1] == '.');
717 * At most one wildcard per pattern.
718 * No wildcards in IDNA labels.
719 * No wildcards after the first label.
721 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
723 /* Only full-label '*.example.com' wildcards? */
724 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
725 && (!atstart || !atend))
727 /* No 'foo*bar' wildcards */
728 if (!atstart && !atend)
731 state &= ~LABEL_START;
732 } else if (('a' <= p[i] && p[i] <= 'z')
733 || ('A' <= p[i] && p[i] <= 'Z')
734 || ('0' <= p[i] && p[i] <= '9')) {
735 if ((state & LABEL_START) != 0
736 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
738 state &= ~(LABEL_HYPHEN | LABEL_START);
739 } else if (p[i] == '.') {
740 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
744 } else if (p[i] == '-') {
745 /* no domain/subdomain starts with '-' */
746 if ((state & LABEL_START) != 0)
748 state |= LABEL_HYPHEN;
755 * The final label must not end in a hyphen or ".", and
756 * there must be at least two dots after the star.
758 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
763 /* Compare using wildcards. */
764 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
765 const unsigned char *subject, size_t subject_len,
768 const unsigned char *star = NULL;
771 * Subject names starting with '.' can only match a wildcard pattern
772 * via a subject sub-domain pattern suffix match.
774 if (!(subject_len > 1 && subject[0] == '.'))
775 star = valid_star(pattern, pattern_len, flags);
777 return equal_nocase(pattern, pattern_len,
778 subject, subject_len, flags);
779 return wildcard_match(pattern, star - pattern,
780 star + 1, (pattern + pattern_len) - star - 1,
781 subject, subject_len, flags);
785 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
786 * cmp_type > 0 only compare if string matches the type, otherwise convert it
790 static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
791 unsigned int flags, const char *b, size_t blen,
796 if (!a->data || !a->length)
799 if (cmp_type != a->type)
801 if (cmp_type == V_ASN1_IA5STRING)
802 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
803 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
805 if (rv > 0 && peername)
806 *peername = OPENSSL_strndup((char *)a->data, a->length);
810 astrlen = ASN1_STRING_to_UTF8(&astr, a);
813 * -1 could be an internal malloc failure or a decoding error from
814 * malformed input; we can't distinguish.
818 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
819 if (rv > 0 && peername)
820 *peername = OPENSSL_strndup((char *)astr, astrlen);
826 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
827 unsigned int flags, int check_type, char **peername)
829 GENERAL_NAMES *gens = NULL;
830 const X509_NAME *name = NULL;
832 int cnid = NID_undef;
838 /* See below, this flag is internal-only */
839 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
840 if (check_type == GEN_EMAIL) {
841 cnid = NID_pkcs9_emailAddress;
842 alt_type = V_ASN1_IA5STRING;
844 } else if (check_type == GEN_DNS) {
845 cnid = NID_commonName;
846 /* Implicit client-side DNS sub-domain pattern */
847 if (chklen > 1 && chk[0] == '.')
848 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
849 alt_type = V_ASN1_IA5STRING;
850 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
851 equal = equal_nocase;
853 equal = equal_wildcard;
855 alt_type = V_ASN1_OCTET_STRING;
860 chklen = strlen(chk);
862 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
864 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
868 gen = sk_GENERAL_NAME_value(gens, i);
869 if ((gen->type == GEN_OTHERNAME) && (check_type == GEN_EMAIL)) {
870 if (OBJ_obj2nid(gen->d.otherName->type_id) ==
871 NID_id_on_SmtpUTF8Mailbox) {
873 cstr = gen->d.otherName->value->value.utf8string;
875 /* Positive on success, negative on error! */
876 if ((rv = do_check_string(cstr, 0, equal, flags,
877 chk, chklen, peername)) != 0)
882 if ((gen->type != check_type) && (gen->type != GEN_OTHERNAME))
886 if (check_type == GEN_EMAIL)
887 cstr = gen->d.rfc822Name;
888 else if (check_type == GEN_DNS)
889 cstr = gen->d.dNSName;
891 cstr = gen->d.iPAddress;
892 /* Positive on success, negative on error! */
893 if ((rv = do_check_string(cstr, alt_type, equal, flags,
894 chk, chklen, peername)) != 0)
897 GENERAL_NAMES_free(gens);
900 if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
904 /* We're done if CN-ID is not pertinent */
905 if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
909 name = X509_get_subject_name(x);
910 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
911 const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
912 const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
914 /* Positive on success, negative on error! */
915 if ((rv = do_check_string(str, -1, equal, flags,
916 chk, chklen, peername)) != 0)
922 int X509_check_host(X509 *x, const char *chk, size_t chklen,
923 unsigned int flags, char **peername)
928 * Embedded NULs are disallowed, except as the last character of a
929 * string of length 2 or more (tolerate caller including terminating
930 * NUL in string length).
933 chklen = strlen(chk);
934 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
936 if (chklen > 1 && chk[chklen - 1] == '\0')
938 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
941 int X509_check_email(X509 *x, const char *chk, size_t chklen,
947 * Embedded NULs are disallowed, except as the last character of a
948 * string of length 2 or more (tolerate caller including terminating
949 * NUL in string length).
952 chklen = strlen((char *)chk);
953 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
955 if (chklen > 1 && chk[chklen - 1] == '\0')
957 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
960 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
965 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
968 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
970 unsigned char ipout[16];
975 iplen = (size_t)a2i_ipadd(ipout, ipasc);
978 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
981 char *ossl_ipaddr_to_asc(unsigned char *p, int len)
984 * 40 is enough space for the longest IPv6 address + nul terminator byte
985 * XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX\0
988 int i = 0, remain = 0, bytes = 0;
992 BIO_snprintf(buf, sizeof(buf), "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
994 /* TODO possibly combine with static i2r_address() in v3_addr.c */
996 for (out = buf, i = 8, remain = sizeof(buf);
997 i-- > 0 && bytes >= 0;
998 remain -= bytes, out += bytes) {
999 const char *template = (i > 0 ? "%X:" : "%X");
1001 bytes = BIO_snprintf(out, remain, template, p[0] << 8 | p[1]);
1006 BIO_snprintf(buf, sizeof(buf), "<invalid length=%d>", len);
1009 return OPENSSL_strdup(buf);
1013 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1017 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1019 unsigned char ipout[16];
1020 ASN1_OCTET_STRING *ret;
1023 /* If string contains a ':' assume IPv6 */
1025 iplen = a2i_ipadd(ipout, ipasc);
1030 ret = ASN1_OCTET_STRING_new();
1033 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1034 ASN1_OCTET_STRING_free(ret);
1040 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1042 ASN1_OCTET_STRING *ret = NULL;
1043 unsigned char ipout[32];
1044 char *iptmp = NULL, *p;
1047 p = strchr(ipasc, '/');
1050 iptmp = OPENSSL_strdup(ipasc);
1053 p = iptmp + (p - ipasc);
1056 iplen1 = a2i_ipadd(ipout, iptmp);
1061 iplen2 = a2i_ipadd(ipout + iplen1, p);
1063 OPENSSL_free(iptmp);
1066 if (!iplen2 || (iplen1 != iplen2))
1069 ret = ASN1_OCTET_STRING_new();
1072 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1078 OPENSSL_free(iptmp);
1079 ASN1_OCTET_STRING_free(ret);
1083 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1085 /* If string contains a ':' assume IPv6 */
1087 if (strchr(ipasc, ':')) {
1088 if (!ipv6_from_asc(ipout, ipasc))
1092 if (!ipv4_from_asc(ipout, ipasc))
1098 static int ipv4_from_asc(unsigned char *v4, const char *in)
1102 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1104 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1105 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1115 /* Temporary store for IPV6 output */
1116 unsigned char tmp[16];
1117 /* Total number of bytes in tmp */
1119 /* The position of a zero (corresponding to '::') */
1121 /* Number of zeroes */
1125 static int ipv6_from_asc(unsigned char *v6, const char *in)
1130 v6stat.zero_pos = -1;
1131 v6stat.zero_cnt = 0;
1133 * Treat the IPv6 representation as a list of values separated by ':'.
1134 * The presence of a '::' will parse as one, two or three zero length
1137 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1140 /* Now for some sanity checks */
1142 if (v6stat.zero_pos == -1) {
1143 /* If no '::' must have exactly 16 bytes */
1144 if (v6stat.total != 16)
1147 /* If '::' must have less than 16 bytes */
1148 if (v6stat.total == 16)
1150 /* More than three zeroes is an error */
1151 if (v6stat.zero_cnt > 3) {
1153 /* Can only have three zeroes if nothing else present */
1154 } else if (v6stat.zero_cnt == 3) {
1155 if (v6stat.total > 0)
1157 } else if (v6stat.zero_cnt == 2) {
1158 /* Can only have two zeroes if at start or end */
1159 if ((v6stat.zero_pos != 0)
1160 && (v6stat.zero_pos != v6stat.total))
1163 /* Can only have one zero if *not* start or end */
1164 if ((v6stat.zero_pos == 0)
1165 || (v6stat.zero_pos == v6stat.total))
1172 if (v6stat.zero_pos >= 0) {
1173 /* Copy initial part */
1174 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1176 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1177 /* Copy final part */
1178 if (v6stat.total != v6stat.zero_pos)
1179 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1180 v6stat.tmp + v6stat.zero_pos,
1181 v6stat.total - v6stat.zero_pos);
1183 memcpy(v6, v6stat.tmp, 16);
1189 static int ipv6_cb(const char *elem, int len, void *usr)
1193 /* Error if 16 bytes written */
1197 /* Zero length element, corresponds to '::' */
1198 if (s->zero_pos == -1)
1199 s->zero_pos = s->total;
1200 /* If we've already got a :: its an error */
1201 else if (s->zero_pos != s->total)
1205 /* If more than 4 characters could be final a.b.c.d form */
1207 /* Need at least 4 bytes left */
1210 /* Must be end of string */
1213 if (!ipv4_from_asc(s->tmp + s->total, elem))
1217 if (!ipv6_hex(s->tmp + s->total, elem, len))
1226 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1229 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1232 unsigned int num = 0;
1240 x = OPENSSL_hexchar2int(c);
1246 out[1] = num & 0xff;
1250 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1251 unsigned long chtype)
1254 int i, mval, spec_char, plus_char;
1260 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1261 v = sk_CONF_VALUE_value(dn_sk, i);
1264 * Skip past any leading X. X: X, etc to allow for multiple instances
1266 for (p = type; *p; p++) {
1267 #ifndef CHARSET_EBCDIC
1268 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1270 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1271 || (*p == os_toascii['.']));
1280 #ifndef CHARSET_EBCDIC
1281 plus_char = (*type == '+');
1283 plus_char = (*type == os_toascii['+']);
1291 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1292 (unsigned char *)v->value, -1, -1,