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>
23 DEFINE_STACK_OF(CONF_VALUE)
24 DEFINE_STACK_OF(GENERAL_NAME)
25 DEFINE_STACK_OF(ACCESS_DESCRIPTION)
26 DEFINE_STACK_OF(X509_EXTENSION)
27 DEFINE_STACK_OF_STRING()
29 static char *strip_spaces(char *name);
30 static int sk_strcmp(const char *const *a, const char *const *b);
31 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
33 static void str_free(OPENSSL_STRING str);
34 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email);
36 static int ipv4_from_asc(unsigned char *v4, const char *in);
37 static int ipv6_from_asc(unsigned char *v6, const char *in);
38 static int ipv6_cb(const char *elem, int len, void *usr);
39 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
41 /* Add a CONF_VALUE name value pair to stack */
43 int X509V3_add_value(const char *name, const char *value,
44 STACK_OF(CONF_VALUE) **extlist)
46 CONF_VALUE *vtmp = NULL;
47 char *tname = NULL, *tvalue = NULL;
48 int sk_allocated = (*extlist == NULL);
50 if (name && (tname = OPENSSL_strdup(name)) == NULL)
52 if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
54 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
56 if (sk_allocated && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
61 if (!sk_CONF_VALUE_push(*extlist, vtmp))
65 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
67 sk_CONF_VALUE_free(*extlist);
76 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
77 STACK_OF(CONF_VALUE) **extlist)
79 return X509V3_add_value(name, (const char *)value, extlist);
82 /* Free function for STACK_OF(CONF_VALUE) */
84 void X509V3_conf_free(CONF_VALUE *conf)
88 OPENSSL_free(conf->name);
89 OPENSSL_free(conf->value);
90 OPENSSL_free(conf->section);
94 int X509V3_add_value_bool(const char *name, int asn1_bool,
95 STACK_OF(CONF_VALUE) **extlist)
98 return X509V3_add_value(name, "TRUE", extlist);
99 return X509V3_add_value(name, "FALSE", extlist);
102 int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
103 STACK_OF(CONF_VALUE) **extlist)
106 return X509V3_add_value(name, "TRUE", extlist);
110 static char *bignum_to_string(const BIGNUM *bn)
116 * Display large numbers in hex and small numbers in decimal. Converting to
117 * decimal takes quadratic time and is no more useful than hex for large
120 if (BN_num_bits(bn) < 128)
121 return BN_bn2dec(bn);
127 len = strlen(tmp) + 3;
128 ret = OPENSSL_malloc(len);
130 X509V3err(X509V3_F_BIGNUM_TO_STRING, ERR_R_MALLOC_FAILURE);
135 /* Prepend "0x", but place it after the "-" if negative. */
137 OPENSSL_strlcpy(ret, "-0x", len);
138 OPENSSL_strlcat(ret, tmp + 1, len);
140 OPENSSL_strlcpy(ret, "0x", len);
141 OPENSSL_strlcat(ret, tmp, len);
147 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
149 BIGNUM *bntmp = NULL;
154 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
155 || (strtmp = bignum_to_string(bntmp)) == NULL)
156 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
161 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
163 BIGNUM *bntmp = NULL;
168 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
169 || (strtmp = bignum_to_string(bntmp)) == NULL)
170 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
175 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
182 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
187 X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
190 if (value[0] == '-') {
196 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
203 ret = BN_hex2bn(&bn, value);
205 ret = BN_dec2bn(&bn, value);
207 if (!ret || value[ret]) {
209 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
213 if (isneg && BN_is_zero(bn))
216 aint = BN_to_ASN1_INTEGER(bn, NULL);
219 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
220 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
224 aint->type |= V_ASN1_NEG;
228 int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
229 STACK_OF(CONF_VALUE) **extlist)
236 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
238 ret = X509V3_add_value(name, strtmp, extlist);
239 OPENSSL_free(strtmp);
243 int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
247 if ((btmp = value->value) == NULL)
249 if (strcmp(btmp, "TRUE") == 0
250 || strcmp(btmp, "true") == 0
251 || strcmp(btmp, "Y") == 0
252 || strcmp(btmp, "y") == 0
253 || strcmp(btmp, "YES") == 0
254 || strcmp(btmp, "yes") == 0) {
258 if (strcmp(btmp, "FALSE") == 0
259 || strcmp(btmp, "false") == 0
260 || strcmp(btmp, "N") == 0
261 || strcmp(btmp, "n") == 0
262 || strcmp(btmp, "NO") == 0
263 || strcmp(btmp, "no") == 0) {
268 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
269 X509V3_R_INVALID_BOOLEAN_STRING);
270 X509V3_conf_err(value);
274 int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
278 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
279 X509V3_conf_err(value);
293 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
297 STACK_OF(CONF_VALUE) *values = NULL;
300 /* We are going to modify the line so copy it first */
301 linebuf = OPENSSL_strdup(line);
302 if (linebuf == NULL) {
303 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
308 /* Go through all characters */
309 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
317 ntmp = strip_spaces(q);
319 X509V3err(X509V3_F_X509V3_PARSE_LIST,
320 X509V3_R_INVALID_NULL_NAME);
324 } else if (c == ',') {
326 ntmp = strip_spaces(q);
329 X509V3err(X509V3_F_X509V3_PARSE_LIST,
330 X509V3_R_INVALID_NULL_NAME);
333 X509V3_add_value(ntmp, NULL, &values);
341 vtmp = strip_spaces(q);
343 X509V3err(X509V3_F_X509V3_PARSE_LIST,
344 X509V3_R_INVALID_NULL_VALUE);
347 X509V3_add_value(ntmp, vtmp, &values);
355 if (state == HDR_VALUE) {
356 vtmp = strip_spaces(q);
358 X509V3err(X509V3_F_X509V3_PARSE_LIST,
359 X509V3_R_INVALID_NULL_VALUE);
362 X509V3_add_value(ntmp, vtmp, &values);
364 ntmp = strip_spaces(q);
366 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
369 X509V3_add_value(ntmp, NULL, &values);
371 OPENSSL_free(linebuf);
375 OPENSSL_free(linebuf);
376 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
381 /* Delete leading and trailing spaces from a string */
382 static char *strip_spaces(char *name)
385 /* Skip over leading spaces */
387 while (*p && ossl_isspace(*p))
391 q = p + strlen(p) - 1;
392 while ((q != p) && ossl_isspace(*q))
403 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
406 int v3_name_cmp(const char *name, const char *cmp)
411 if ((ret = strncmp(name, cmp, len)))
414 if (!c || (c == '.'))
419 static int sk_strcmp(const char *const *a, const char *const *b)
421 return strcmp(*a, *b);
424 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
427 STACK_OF(OPENSSL_STRING) *ret;
429 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
430 ret = get_email(X509_get_subject_name(x), gens);
431 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
435 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
437 AUTHORITY_INFO_ACCESS *info;
438 STACK_OF(OPENSSL_STRING) *ret = NULL;
441 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
444 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
445 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
446 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
447 if (ad->location->type == GEN_URI) {
449 (&ret, ad->location->d.uniformResourceIdentifier))
454 AUTHORITY_INFO_ACCESS_free(info);
458 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
461 STACK_OF(X509_EXTENSION) *exts;
462 STACK_OF(OPENSSL_STRING) *ret;
464 exts = X509_REQ_get_extensions(x);
465 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
466 ret = get_email(X509_REQ_get_subject_name(x), gens);
467 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
468 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
472 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
475 STACK_OF(OPENSSL_STRING) *ret = NULL;
477 const ASN1_IA5STRING *email;
481 /* Now add any email address(es) to STACK */
482 /* First supplied X509_NAME */
483 while ((i = X509_NAME_get_index_by_NID(name,
484 NID_pkcs9_emailAddress, i)) >= 0) {
485 ne = X509_NAME_get_entry(name, i);
486 email = X509_NAME_ENTRY_get_data(ne);
487 if (!append_ia5(&ret, email))
490 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
491 gen = sk_GENERAL_NAME_value(gens, i);
492 if (gen->type != GEN_EMAIL)
494 if (!append_ia5(&ret, gen->d.ia5))
500 static void str_free(OPENSSL_STRING str)
505 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email)
508 /* First some sanity checks */
509 if (email->type != V_ASN1_IA5STRING)
511 if (!email->data || !email->length)
514 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
517 /* Don't add duplicates */
518 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
520 emtmp = OPENSSL_strdup((char *)email->data);
521 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
522 OPENSSL_free(emtmp); /* free on push failure */
523 X509_email_free(*sk);
530 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
532 sk_OPENSSL_STRING_pop_free(sk, str_free);
535 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
536 const unsigned char *subject, size_t subject_len,
539 /* Skip pattern prefix to match "wildcard" subject */
540 static void skip_prefix(const unsigned char **p, size_t *plen,
544 const unsigned char *pattern = *p;
545 size_t pattern_len = *plen;
548 * If subject starts with a leading '.' followed by more octets, and
549 * pattern is longer, compare just an equal-length suffix with the
550 * full subject (starting at the '.'), provided the prefix contains
553 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
556 while (pattern_len > subject_len && *pattern) {
557 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
564 /* Skip if entire prefix acceptable */
565 if (pattern_len == subject_len) {
571 /* Compare while ASCII ignoring case. */
572 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
573 const unsigned char *subject, size_t subject_len,
576 skip_prefix(&pattern, &pattern_len, subject_len, flags);
577 if (pattern_len != subject_len)
579 while (pattern_len) {
580 unsigned char l = *pattern;
581 unsigned char r = *subject;
582 /* The pattern must not contain NUL characters. */
586 if ('A' <= l && l <= 'Z')
588 if ('A' <= r && r <= 'Z')
600 /* Compare using memcmp. */
601 static int equal_case(const unsigned char *pattern, size_t pattern_len,
602 const unsigned char *subject, size_t subject_len,
605 skip_prefix(&pattern, &pattern_len, subject_len, flags);
606 if (pattern_len != subject_len)
608 return !memcmp(pattern, subject, pattern_len);
612 * RFC 5280, section 7.5, requires that only the domain is compared in a
613 * case-insensitive manner.
615 static int equal_email(const unsigned char *a, size_t a_len,
616 const unsigned char *b, size_t b_len,
617 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;
707 for (i = 0; i < len; ++i) {
709 * Locate first and only legal wildcard, either at the start
710 * or end of a non-IDNA first and not final label.
713 int atstart = (state & LABEL_START);
714 int atend = (i == len - 1 || p[i + 1] == '.');
716 * At most one wildcard per pattern.
717 * No wildcards in IDNA labels.
718 * No wildcards after the first label.
720 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
722 /* Only full-label '*.example.com' wildcards? */
723 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
724 && (!atstart || !atend))
726 /* No 'foo*bar' wildcards */
727 if (!atstart && !atend)
730 state &= ~LABEL_START;
731 } else if (('a' <= p[i] && p[i] <= 'z')
732 || ('A' <= p[i] && p[i] <= 'Z')
733 || ('0' <= p[i] && p[i] <= '9')) {
734 if ((state & LABEL_START) != 0
735 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
737 state &= ~(LABEL_HYPHEN | LABEL_START);
738 } else if (p[i] == '.') {
739 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
743 } else if (p[i] == '-') {
744 /* no domain/subdomain starts with '-' */
745 if ((state & LABEL_START) != 0)
747 state |= LABEL_HYPHEN;
753 * The final label must not end in a hyphen or ".", and
754 * there must be at least two dots after the star.
756 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
761 /* Compare using wildcards. */
762 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
763 const unsigned char *subject, size_t subject_len,
766 const unsigned char *star = NULL;
769 * Subject names starting with '.' can only match a wildcard pattern
770 * via a subject sub-domain pattern suffix match.
772 if (!(subject_len > 1 && subject[0] == '.'))
773 star = valid_star(pattern, pattern_len, flags);
775 return equal_nocase(pattern, pattern_len,
776 subject, subject_len, flags);
777 return wildcard_match(pattern, star - pattern,
778 star + 1, (pattern + pattern_len) - star - 1,
779 subject, subject_len, flags);
783 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
784 * cmp_type > 0 only compare if string matches the type, otherwise convert it
788 static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
789 unsigned int flags, const char *b, size_t blen,
794 if (!a->data || !a->length)
797 if (cmp_type != a->type)
799 if (cmp_type == V_ASN1_IA5STRING)
800 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
801 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
803 if (rv > 0 && peername)
804 *peername = OPENSSL_strndup((char *)a->data, a->length);
808 astrlen = ASN1_STRING_to_UTF8(&astr, a);
811 * -1 could be an internal malloc failure or a decoding error from
812 * malformed input; we can't distinguish.
816 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
817 if (rv > 0 && peername)
818 *peername = OPENSSL_strndup((char *)astr, astrlen);
824 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
825 unsigned int flags, int check_type, char **peername)
827 GENERAL_NAMES *gens = NULL;
828 const X509_NAME *name = NULL;
830 int cnid = NID_undef;
836 /* See below, this flag is internal-only */
837 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
838 if (check_type == GEN_EMAIL) {
839 cnid = NID_pkcs9_emailAddress;
840 alt_type = V_ASN1_IA5STRING;
842 } else if (check_type == GEN_DNS) {
843 cnid = NID_commonName;
844 /* Implicit client-side DNS sub-domain pattern */
845 if (chklen > 1 && chk[0] == '.')
846 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
847 alt_type = V_ASN1_IA5STRING;
848 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
849 equal = equal_nocase;
851 equal = equal_wildcard;
853 alt_type = V_ASN1_OCTET_STRING;
858 chklen = strlen(chk);
860 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
862 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
865 gen = sk_GENERAL_NAME_value(gens, i);
866 if (gen->type != check_type)
869 if (check_type == GEN_EMAIL)
870 cstr = gen->d.rfc822Name;
871 else if (check_type == GEN_DNS)
872 cstr = gen->d.dNSName;
874 cstr = gen->d.iPAddress;
875 /* Positive on success, negative on error! */
876 if ((rv = do_check_string(cstr, alt_type, equal, flags,
877 chk, chklen, peername)) != 0)
880 GENERAL_NAMES_free(gens);
883 if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
887 /* We're done if CN-ID is not pertinent */
888 if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
892 name = X509_get_subject_name(x);
893 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
894 const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
895 const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
897 /* Positive on success, negative on error! */
898 if ((rv = do_check_string(str, -1, equal, flags,
899 chk, chklen, peername)) != 0)
905 int X509_check_host(X509 *x, const char *chk, size_t chklen,
906 unsigned int flags, char **peername)
911 * Embedded NULs are disallowed, except as the last character of a
912 * string of length 2 or more (tolerate caller including terminating
913 * NUL in string length).
916 chklen = strlen(chk);
917 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
919 if (chklen > 1 && chk[chklen - 1] == '\0')
921 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
924 int X509_check_email(X509 *x, const char *chk, size_t chklen,
930 * Embedded NULs are disallowed, except as the last character of a
931 * string of length 2 or more (tolerate caller including terminating
932 * NUL in string length).
935 chklen = strlen((char *)chk);
936 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
938 if (chklen > 1 && chk[chklen - 1] == '\0')
940 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
943 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
948 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
951 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
953 unsigned char ipout[16];
958 iplen = (size_t)a2i_ipadd(ipout, ipasc);
961 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
965 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
969 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
971 unsigned char ipout[16];
972 ASN1_OCTET_STRING *ret;
975 /* If string contains a ':' assume IPv6 */
977 iplen = a2i_ipadd(ipout, ipasc);
982 ret = ASN1_OCTET_STRING_new();
985 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
986 ASN1_OCTET_STRING_free(ret);
992 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
994 ASN1_OCTET_STRING *ret = NULL;
995 unsigned char ipout[32];
996 char *iptmp = NULL, *p;
999 p = strchr(ipasc, '/');
1002 iptmp = OPENSSL_strdup(ipasc);
1005 p = iptmp + (p - ipasc);
1008 iplen1 = a2i_ipadd(ipout, iptmp);
1013 iplen2 = a2i_ipadd(ipout + iplen1, p);
1015 OPENSSL_free(iptmp);
1018 if (!iplen2 || (iplen1 != iplen2))
1021 ret = ASN1_OCTET_STRING_new();
1024 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1030 OPENSSL_free(iptmp);
1031 ASN1_OCTET_STRING_free(ret);
1035 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1037 /* If string contains a ':' assume IPv6 */
1039 if (strchr(ipasc, ':')) {
1040 if (!ipv6_from_asc(ipout, ipasc))
1044 if (!ipv4_from_asc(ipout, ipasc))
1050 static int ipv4_from_asc(unsigned char *v4, const char *in)
1053 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1055 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1056 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1066 /* Temporary store for IPV6 output */
1067 unsigned char tmp[16];
1068 /* Total number of bytes in tmp */
1070 /* The position of a zero (corresponding to '::') */
1072 /* Number of zeroes */
1076 static int ipv6_from_asc(unsigned char *v6, const char *in)
1080 v6stat.zero_pos = -1;
1081 v6stat.zero_cnt = 0;
1083 * Treat the IPv6 representation as a list of values separated by ':'.
1084 * The presence of a '::' will parse as one, two or three zero length
1087 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1090 /* Now for some sanity checks */
1092 if (v6stat.zero_pos == -1) {
1093 /* If no '::' must have exactly 16 bytes */
1094 if (v6stat.total != 16)
1097 /* If '::' must have less than 16 bytes */
1098 if (v6stat.total == 16)
1100 /* More than three zeroes is an error */
1101 if (v6stat.zero_cnt > 3)
1103 /* Can only have three zeroes if nothing else present */
1104 else if (v6stat.zero_cnt == 3) {
1105 if (v6stat.total > 0)
1108 /* Can only have two zeroes if at start or end */
1109 else if (v6stat.zero_cnt == 2) {
1110 if ((v6stat.zero_pos != 0)
1111 && (v6stat.zero_pos != v6stat.total))
1114 /* Can only have one zero if *not* start or end */
1116 if ((v6stat.zero_pos == 0)
1117 || (v6stat.zero_pos == v6stat.total))
1124 if (v6stat.zero_pos >= 0) {
1125 /* Copy initial part */
1126 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1128 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1129 /* Copy final part */
1130 if (v6stat.total != v6stat.zero_pos)
1131 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1132 v6stat.tmp + v6stat.zero_pos,
1133 v6stat.total - v6stat.zero_pos);
1135 memcpy(v6, v6stat.tmp, 16);
1140 static int ipv6_cb(const char *elem, int len, void *usr)
1143 /* Error if 16 bytes written */
1147 /* Zero length element, corresponds to '::' */
1148 if (s->zero_pos == -1)
1149 s->zero_pos = s->total;
1150 /* If we've already got a :: its an error */
1151 else if (s->zero_pos != s->total)
1155 /* If more than 4 characters could be final a.b.c.d form */
1157 /* Need at least 4 bytes left */
1160 /* Must be end of string */
1163 if (!ipv4_from_asc(s->tmp + s->total, elem))
1167 if (!ipv6_hex(s->tmp + s->total, elem, len))
1176 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1179 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1182 unsigned int num = 0;
1190 x = OPENSSL_hexchar2int(c);
1196 out[1] = num & 0xff;
1200 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1201 unsigned long chtype)
1204 int i, mval, spec_char, plus_char;
1209 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1210 v = sk_CONF_VALUE_value(dn_sk, i);
1213 * Skip past any leading X. X: X, etc to allow for multiple instances
1215 for (p = type; *p; p++) {
1216 #ifndef CHARSET_EBCDIC
1217 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1219 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1220 || (*p == os_toascii['.']));
1229 #ifndef CHARSET_EBCDIC
1230 plus_char = (*type == '+');
1232 plus_char = (*type == os_toascii['+']);
1239 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1240 (unsigned char *)v->value, -1, -1,