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,
35 const ASN1_IA5STRING *email);
37 static int ipv4_from_asc(unsigned char *v4, const char *in);
38 static int ipv6_from_asc(unsigned char *v6, const char *in);
39 static int ipv6_cb(const char *elem, int len, void *usr);
40 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
42 /* Add a CONF_VALUE name value pair to stack */
44 int X509V3_add_value(const char *name, const char *value,
45 STACK_OF(CONF_VALUE) **extlist)
47 CONF_VALUE *vtmp = NULL;
48 char *tname = NULL, *tvalue = NULL;
49 int sk_allocated = (*extlist == NULL);
51 if (name && (tname = OPENSSL_strdup(name)) == NULL)
53 if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
55 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
57 if (sk_allocated && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
62 if (!sk_CONF_VALUE_push(*extlist, vtmp))
66 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
68 sk_CONF_VALUE_free(*extlist);
77 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
78 STACK_OF(CONF_VALUE) **extlist)
80 return X509V3_add_value(name, (const char *)value, extlist);
83 /* Free function for STACK_OF(CONF_VALUE) */
85 void X509V3_conf_free(CONF_VALUE *conf)
89 OPENSSL_free(conf->name);
90 OPENSSL_free(conf->value);
91 OPENSSL_free(conf->section);
95 int X509V3_add_value_bool(const char *name, int asn1_bool,
96 STACK_OF(CONF_VALUE) **extlist)
99 return X509V3_add_value(name, "TRUE", extlist);
100 return X509V3_add_value(name, "FALSE", extlist);
103 int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
104 STACK_OF(CONF_VALUE) **extlist)
107 return X509V3_add_value(name, "TRUE", extlist);
111 static char *bignum_to_string(const BIGNUM *bn)
117 * Display large numbers in hex and small numbers in decimal. Converting to
118 * decimal takes quadratic time and is no more useful than hex for large
121 if (BN_num_bits(bn) < 128)
122 return BN_bn2dec(bn);
128 len = strlen(tmp) + 3;
129 ret = OPENSSL_malloc(len);
131 X509V3err(X509V3_F_BIGNUM_TO_STRING, ERR_R_MALLOC_FAILURE);
136 /* Prepend "0x", but place it after the "-" if negative. */
138 OPENSSL_strlcpy(ret, "-0x", len);
139 OPENSSL_strlcat(ret, tmp + 1, len);
141 OPENSSL_strlcpy(ret, "0x", len);
142 OPENSSL_strlcat(ret, tmp, len);
148 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
150 BIGNUM *bntmp = NULL;
155 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
156 || (strtmp = bignum_to_string(bntmp)) == NULL)
157 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
162 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
164 BIGNUM *bntmp = NULL;
169 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
170 || (strtmp = bignum_to_string(bntmp)) == NULL)
171 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
176 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
184 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
189 X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
192 if (value[0] == '-') {
199 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
207 ret = BN_hex2bn(&bn, value);
209 ret = BN_dec2bn(&bn, value);
211 if (!ret || value[ret]) {
213 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
217 if (isneg && BN_is_zero(bn))
220 aint = BN_to_ASN1_INTEGER(bn, NULL);
223 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
224 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
228 aint->type |= V_ASN1_NEG;
232 int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
233 STACK_OF(CONF_VALUE) **extlist)
240 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
242 ret = X509V3_add_value(name, strtmp, extlist);
243 OPENSSL_free(strtmp);
247 int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
251 if ((btmp = value->value) == NULL)
253 if (strcmp(btmp, "TRUE") == 0
254 || strcmp(btmp, "true") == 0
255 || strcmp(btmp, "Y") == 0
256 || strcmp(btmp, "y") == 0
257 || strcmp(btmp, "YES") == 0
258 || strcmp(btmp, "yes") == 0) {
262 if (strcmp(btmp, "FALSE") == 0
263 || strcmp(btmp, "false") == 0
264 || strcmp(btmp, "N") == 0
265 || strcmp(btmp, "n") == 0
266 || strcmp(btmp, "NO") == 0
267 || strcmp(btmp, "no") == 0) {
272 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
273 X509V3_R_INVALID_BOOLEAN_STRING);
274 X509V3_conf_err(value);
278 int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
282 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
283 X509V3_conf_err(value);
297 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
301 STACK_OF(CONF_VALUE) *values = NULL;
305 /* We are going to modify the line so copy it first */
306 linebuf = OPENSSL_strdup(line);
307 if (linebuf == NULL) {
308 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
313 /* Go through all characters */
314 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
322 ntmp = strip_spaces(q);
324 X509V3err(X509V3_F_X509V3_PARSE_LIST,
325 X509V3_R_INVALID_NULL_NAME);
329 } else if (c == ',') {
331 ntmp = strip_spaces(q);
334 X509V3err(X509V3_F_X509V3_PARSE_LIST,
335 X509V3_R_INVALID_NULL_NAME);
338 X509V3_add_value(ntmp, NULL, &values);
346 vtmp = strip_spaces(q);
348 X509V3err(X509V3_F_X509V3_PARSE_LIST,
349 X509V3_R_INVALID_NULL_VALUE);
352 X509V3_add_value(ntmp, vtmp, &values);
360 if (state == HDR_VALUE) {
361 vtmp = strip_spaces(q);
363 X509V3err(X509V3_F_X509V3_PARSE_LIST,
364 X509V3_R_INVALID_NULL_VALUE);
367 X509V3_add_value(ntmp, vtmp, &values);
369 ntmp = strip_spaces(q);
371 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
374 X509V3_add_value(ntmp, NULL, &values);
376 OPENSSL_free(linebuf);
380 OPENSSL_free(linebuf);
381 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
386 /* Delete leading and trailing spaces from a string */
387 static char *strip_spaces(char *name)
391 /* Skip over leading spaces */
393 while (*p && ossl_isspace(*p))
397 q = p + strlen(p) - 1;
398 while ((q != p) && ossl_isspace(*q))
409 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
412 int v3_name_cmp(const char *name, const char *cmp)
418 if ((ret = strncmp(name, cmp, len)))
421 if (!c || (c == '.'))
426 static int sk_strcmp(const char *const *a, const char *const *b)
428 return strcmp(*a, *b);
431 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
434 STACK_OF(OPENSSL_STRING) *ret;
436 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
437 ret = get_email(X509_get_subject_name(x), gens);
438 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
442 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
444 AUTHORITY_INFO_ACCESS *info;
445 STACK_OF(OPENSSL_STRING) *ret = NULL;
448 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
451 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
452 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
453 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
454 if (ad->location->type == GEN_URI) {
456 (&ret, ad->location->d.uniformResourceIdentifier))
461 AUTHORITY_INFO_ACCESS_free(info);
465 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
468 STACK_OF(X509_EXTENSION) *exts;
469 STACK_OF(OPENSSL_STRING) *ret;
471 exts = X509_REQ_get_extensions(x);
472 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
473 ret = get_email(X509_REQ_get_subject_name(x), gens);
474 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
475 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
479 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
482 STACK_OF(OPENSSL_STRING) *ret = NULL;
484 const ASN1_IA5STRING *email;
488 /* Now add any email address(es) to STACK */
489 /* First supplied X509_NAME */
490 while ((i = X509_NAME_get_index_by_NID(name,
491 NID_pkcs9_emailAddress, i)) >= 0) {
492 ne = X509_NAME_get_entry(name, i);
493 email = X509_NAME_ENTRY_get_data(ne);
494 if (!append_ia5(&ret, email))
497 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
498 gen = sk_GENERAL_NAME_value(gens, i);
499 if (gen->type != GEN_EMAIL)
501 if (!append_ia5(&ret, gen->d.ia5))
507 static void str_free(OPENSSL_STRING str)
512 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk,
513 const ASN1_IA5STRING *email)
517 /* First some sanity checks */
518 if (email->type != V_ASN1_IA5STRING)
520 if (!email->data || !email->length)
523 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
526 /* Don't add duplicates */
527 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
529 emtmp = OPENSSL_strdup((char *)email->data);
530 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
531 OPENSSL_free(emtmp); /* free on push failure */
532 X509_email_free(*sk);
539 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
541 sk_OPENSSL_STRING_pop_free(sk, str_free);
544 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
545 const unsigned char *subject, size_t subject_len,
548 /* Skip pattern prefix to match "wildcard" subject */
549 static void skip_prefix(const unsigned char **p, size_t *plen,
553 const unsigned char *pattern = *p;
554 size_t pattern_len = *plen;
557 * If subject starts with a leading '.' followed by more octets, and
558 * pattern is longer, compare just an equal-length suffix with the
559 * full subject (starting at the '.'), provided the prefix contains
562 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
565 while (pattern_len > subject_len && *pattern) {
566 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
573 /* Skip if entire prefix acceptable */
574 if (pattern_len == subject_len) {
580 /* Compare while ASCII ignoring case. */
581 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
582 const unsigned char *subject, size_t subject_len,
585 skip_prefix(&pattern, &pattern_len, subject_len, flags);
586 if (pattern_len != subject_len)
588 while (pattern_len != 0) {
589 unsigned char l = *pattern;
590 unsigned char r = *subject;
592 /* The pattern must not contain NUL characters. */
596 if ('A' <= l && l <= 'Z')
598 if ('A' <= r && r <= 'Z')
610 /* Compare using memcmp. */
611 static int equal_case(const unsigned char *pattern, size_t pattern_len,
612 const unsigned char *subject, size_t subject_len,
615 skip_prefix(&pattern, &pattern_len, subject_len, flags);
616 if (pattern_len != subject_len)
618 return !memcmp(pattern, subject, pattern_len);
622 * RFC 5280, section 7.5, requires that only the domain is compared in a
623 * case-insensitive manner.
625 static int equal_email(const unsigned char *a, size_t a_len,
626 const unsigned char *b, size_t b_len,
627 unsigned int unused_flags)
634 * We search backwards for the '@' character, so that we do not have to
635 * deal with quoted local-parts. The domain part is compared in a
636 * case-insensitive manner.
640 if (a[i] == '@' || b[i] == '@') {
641 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
648 return equal_case(a, i, b, i, 0);
652 * Compare the prefix and suffix with the subject, and check that the
653 * characters in-between are valid.
655 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
656 const unsigned char *suffix, size_t suffix_len,
657 const unsigned char *subject, size_t subject_len,
660 const unsigned char *wildcard_start;
661 const unsigned char *wildcard_end;
662 const unsigned char *p;
666 if (subject_len < prefix_len + suffix_len)
668 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
670 wildcard_start = subject + prefix_len;
671 wildcard_end = subject + (subject_len - suffix_len);
672 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
675 * If the wildcard makes up the entire first label, it must match at
676 * least one character.
678 if (prefix_len == 0 && *suffix == '.') {
679 if (wildcard_start == wildcard_end)
682 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
685 /* IDNA labels cannot match partial wildcards */
687 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
689 /* The wildcard may match a literal '*' */
690 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
693 * Check that the part matched by the wildcard contains only
694 * permitted characters and only matches a single label unless
695 * allow_multi is set.
697 for (p = wildcard_start; p != wildcard_end; ++p)
698 if (!(('0' <= *p && *p <= '9') ||
699 ('A' <= *p && *p <= 'Z') ||
700 ('a' <= *p && *p <= 'z') ||
701 *p == '-' || (allow_multi && *p == '.')))
706 #define LABEL_START (1 << 0)
707 #define LABEL_END (1 << 1)
708 #define LABEL_HYPHEN (1 << 2)
709 #define LABEL_IDNA (1 << 3)
711 static const unsigned char *valid_star(const unsigned char *p, size_t len,
714 const unsigned char *star = 0;
716 int state = LABEL_START;
719 for (i = 0; i < len; ++i) {
721 * Locate first and only legal wildcard, either at the start
722 * or end of a non-IDNA first and not final label.
725 int atstart = (state & LABEL_START);
726 int atend = (i == len - 1 || p[i + 1] == '.');
728 * At most one wildcard per pattern.
729 * No wildcards in IDNA labels.
730 * No wildcards after the first label.
732 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
734 /* Only full-label '*.example.com' wildcards? */
735 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
736 && (!atstart || !atend))
738 /* No 'foo*bar' wildcards */
739 if (!atstart && !atend)
742 state &= ~LABEL_START;
743 } else if (('a' <= p[i] && p[i] <= 'z')
744 || ('A' <= p[i] && p[i] <= 'Z')
745 || ('0' <= p[i] && p[i] <= '9')) {
746 if ((state & LABEL_START) != 0
747 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
749 state &= ~(LABEL_HYPHEN | LABEL_START);
750 } else if (p[i] == '.') {
751 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
755 } else if (p[i] == '-') {
756 /* no domain/subdomain starts with '-' */
757 if ((state & LABEL_START) != 0)
759 state |= LABEL_HYPHEN;
766 * The final label must not end in a hyphen or ".", and
767 * there must be at least two dots after the star.
769 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
774 /* Compare using wildcards. */
775 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
776 const unsigned char *subject, size_t subject_len,
779 const unsigned char *star = NULL;
782 * Subject names starting with '.' can only match a wildcard pattern
783 * via a subject sub-domain pattern suffix match.
785 if (!(subject_len > 1 && subject[0] == '.'))
786 star = valid_star(pattern, pattern_len, flags);
788 return equal_nocase(pattern, pattern_len,
789 subject, subject_len, flags);
790 return wildcard_match(pattern, star - pattern,
791 star + 1, (pattern + pattern_len) - star - 1,
792 subject, subject_len, flags);
796 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
797 * cmp_type > 0 only compare if string matches the type, otherwise convert it
801 static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
802 unsigned int flags, const char *b, size_t blen,
807 if (!a->data || !a->length)
810 if (cmp_type != a->type)
812 if (cmp_type == V_ASN1_IA5STRING)
813 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
814 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
816 if (rv > 0 && peername)
817 *peername = OPENSSL_strndup((char *)a->data, a->length);
821 astrlen = ASN1_STRING_to_UTF8(&astr, a);
824 * -1 could be an internal malloc failure or a decoding error from
825 * malformed input; we can't distinguish.
829 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
830 if (rv > 0 && peername)
831 *peername = OPENSSL_strndup((char *)astr, astrlen);
837 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
838 unsigned int flags, int check_type, char **peername)
840 GENERAL_NAMES *gens = NULL;
841 const X509_NAME *name = NULL;
843 int cnid = NID_undef;
849 /* See below, this flag is internal-only */
850 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
851 if (check_type == GEN_EMAIL) {
852 cnid = NID_pkcs9_emailAddress;
853 alt_type = V_ASN1_IA5STRING;
855 } else if (check_type == GEN_DNS) {
856 cnid = NID_commonName;
857 /* Implicit client-side DNS sub-domain pattern */
858 if (chklen > 1 && chk[0] == '.')
859 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
860 alt_type = V_ASN1_IA5STRING;
861 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
862 equal = equal_nocase;
864 equal = equal_wildcard;
866 alt_type = V_ASN1_OCTET_STRING;
871 chklen = strlen(chk);
873 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
875 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
879 gen = sk_GENERAL_NAME_value(gens, i);
880 if (gen->type != check_type)
883 if (check_type == GEN_EMAIL)
884 cstr = gen->d.rfc822Name;
885 else if (check_type == GEN_DNS)
886 cstr = gen->d.dNSName;
888 cstr = gen->d.iPAddress;
889 /* Positive on success, negative on error! */
890 if ((rv = do_check_string(cstr, alt_type, equal, flags,
891 chk, chklen, peername)) != 0)
894 GENERAL_NAMES_free(gens);
897 if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
901 /* We're done if CN-ID is not pertinent */
902 if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
906 name = X509_get_subject_name(x);
907 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
908 const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
909 const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
911 /* Positive on success, negative on error! */
912 if ((rv = do_check_string(str, -1, equal, flags,
913 chk, chklen, peername)) != 0)
919 int X509_check_host(X509 *x, const char *chk, size_t chklen,
920 unsigned int flags, char **peername)
925 * Embedded NULs are disallowed, except as the last character of a
926 * string of length 2 or more (tolerate caller including terminating
927 * NUL in string length).
930 chklen = strlen(chk);
931 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
933 if (chklen > 1 && chk[chklen - 1] == '\0')
935 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
938 int X509_check_email(X509 *x, const char *chk, size_t chklen,
944 * Embedded NULs are disallowed, except as the last character of a
945 * string of length 2 or more (tolerate caller including terminating
946 * NUL in string length).
949 chklen = strlen((char *)chk);
950 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
952 if (chklen > 1 && chk[chklen - 1] == '\0')
954 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
957 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
962 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
965 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
967 unsigned char ipout[16];
972 iplen = (size_t)a2i_ipadd(ipout, ipasc);
975 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
978 char *ipaddr_to_asc(unsigned char *p, int len)
984 BIO_snprintf(buf, sizeof(buf), "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
986 /* TODO possibly combine with static i2r_address() in v3_addr.c */
988 for (out = buf; out < buf + 8 * 3; out += 3) {
989 BIO_snprintf(out, 3 + 1, "%X:", p[0] << 8 | p[1]);
995 BIO_snprintf(buf, sizeof(buf), "<invalid length=%d>", len);
998 return OPENSSL_strdup(buf);
1002 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1006 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1008 unsigned char ipout[16];
1009 ASN1_OCTET_STRING *ret;
1012 /* If string contains a ':' assume IPv6 */
1014 iplen = a2i_ipadd(ipout, ipasc);
1019 ret = ASN1_OCTET_STRING_new();
1022 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1023 ASN1_OCTET_STRING_free(ret);
1029 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1031 ASN1_OCTET_STRING *ret = NULL;
1032 unsigned char ipout[32];
1033 char *iptmp = NULL, *p;
1036 p = strchr(ipasc, '/');
1039 iptmp = OPENSSL_strdup(ipasc);
1042 p = iptmp + (p - ipasc);
1045 iplen1 = a2i_ipadd(ipout, iptmp);
1050 iplen2 = a2i_ipadd(ipout + iplen1, p);
1052 OPENSSL_free(iptmp);
1055 if (!iplen2 || (iplen1 != iplen2))
1058 ret = ASN1_OCTET_STRING_new();
1061 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1067 OPENSSL_free(iptmp);
1068 ASN1_OCTET_STRING_free(ret);
1072 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
1074 /* If string contains a ':' assume IPv6 */
1076 if (strchr(ipasc, ':')) {
1077 if (!ipv6_from_asc(ipout, ipasc))
1081 if (!ipv4_from_asc(ipout, ipasc))
1087 static int ipv4_from_asc(unsigned char *v4, const char *in)
1091 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1093 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1094 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1104 /* Temporary store for IPV6 output */
1105 unsigned char tmp[16];
1106 /* Total number of bytes in tmp */
1108 /* The position of a zero (corresponding to '::') */
1110 /* Number of zeroes */
1114 static int ipv6_from_asc(unsigned char *v6, const char *in)
1119 v6stat.zero_pos = -1;
1120 v6stat.zero_cnt = 0;
1122 * Treat the IPv6 representation as a list of values separated by ':'.
1123 * The presence of a '::' will parse as one, two or three zero length
1126 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1129 /* Now for some sanity checks */
1131 if (v6stat.zero_pos == -1) {
1132 /* If no '::' must have exactly 16 bytes */
1133 if (v6stat.total != 16)
1136 /* If '::' must have less than 16 bytes */
1137 if (v6stat.total == 16)
1139 /* More than three zeroes is an error */
1140 if (v6stat.zero_cnt > 3) {
1142 /* Can only have three zeroes if nothing else present */
1143 } else if (v6stat.zero_cnt == 3) {
1144 if (v6stat.total > 0)
1146 } else if (v6stat.zero_cnt == 2) {
1147 /* Can only have two zeroes if at start or end */
1148 if ((v6stat.zero_pos != 0)
1149 && (v6stat.zero_pos != v6stat.total))
1152 /* Can only have one zero if *not* start or end */
1153 if ((v6stat.zero_pos == 0)
1154 || (v6stat.zero_pos == v6stat.total))
1161 if (v6stat.zero_pos >= 0) {
1162 /* Copy initial part */
1163 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1165 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1166 /* Copy final part */
1167 if (v6stat.total != v6stat.zero_pos)
1168 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1169 v6stat.tmp + v6stat.zero_pos,
1170 v6stat.total - v6stat.zero_pos);
1172 memcpy(v6, v6stat.tmp, 16);
1178 static int ipv6_cb(const char *elem, int len, void *usr)
1182 /* Error if 16 bytes written */
1186 /* Zero length element, corresponds to '::' */
1187 if (s->zero_pos == -1)
1188 s->zero_pos = s->total;
1189 /* If we've already got a :: its an error */
1190 else if (s->zero_pos != s->total)
1194 /* If more than 4 characters could be final a.b.c.d form */
1196 /* Need at least 4 bytes left */
1199 /* Must be end of string */
1202 if (!ipv4_from_asc(s->tmp + s->total, elem))
1206 if (!ipv6_hex(s->tmp + s->total, elem, len))
1215 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1218 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1221 unsigned int num = 0;
1229 x = OPENSSL_hexchar2int(c);
1235 out[1] = num & 0xff;
1239 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1240 unsigned long chtype)
1243 int i, mval, spec_char, plus_char;
1249 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1250 v = sk_CONF_VALUE_value(dn_sk, i);
1253 * Skip past any leading X. X: X, etc to allow for multiple instances
1255 for (p = type; *p; p++) {
1256 #ifndef CHARSET_EBCDIC
1257 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1259 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1260 || (*p == os_toascii['.']));
1269 #ifndef CHARSET_EBCDIC
1270 plus_char = (*type == '+');
1272 plus_char = (*type == os_toascii['+']);
1280 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1281 (unsigned char *)v->value, -1, -1,