2 * Copyright 1999-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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 "internal/ctype.h"
16 #include <openssl/conf.h>
17 #include <openssl/x509v3.h>
18 #include "internal/x509_int.h"
19 #include <openssl/bn.h>
22 static char *strip_spaces(char *name);
23 static int sk_strcmp(const char *const *a, const char *const *b);
24 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
26 static void str_free(OPENSSL_STRING str);
27 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email);
29 static int ipv4_from_asc(unsigned char *v4, const char *in);
30 static int ipv6_from_asc(unsigned char *v6, const char *in);
31 static int ipv6_cb(const char *elem, int len, void *usr);
32 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
34 /* Add a CONF_VALUE name value pair to stack */
36 int X509V3_add_value(const char *name, const char *value,
37 STACK_OF(CONF_VALUE) **extlist)
39 CONF_VALUE *vtmp = NULL;
40 char *tname = NULL, *tvalue = NULL;
41 int sk_allocated = (*extlist == NULL);
43 if (name && (tname = OPENSSL_strdup(name)) == NULL)
45 if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
47 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
49 if (sk_allocated && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
54 if (!sk_CONF_VALUE_push(*extlist, vtmp))
58 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
60 sk_CONF_VALUE_free(*extlist);
69 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
70 STACK_OF(CONF_VALUE) **extlist)
72 return X509V3_add_value(name, (const char *)value, extlist);
75 /* Free function for STACK_OF(CONF_VALUE) */
77 void X509V3_conf_free(CONF_VALUE *conf)
81 OPENSSL_free(conf->name);
82 OPENSSL_free(conf->value);
83 OPENSSL_free(conf->section);
87 int X509V3_add_value_bool(const char *name, int asn1_bool,
88 STACK_OF(CONF_VALUE) **extlist)
91 return X509V3_add_value(name, "TRUE", extlist);
92 return X509V3_add_value(name, "FALSE", extlist);
95 int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
96 STACK_OF(CONF_VALUE) **extlist)
99 return X509V3_add_value(name, "TRUE", extlist);
103 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
105 BIGNUM *bntmp = NULL;
110 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
111 || (strtmp = BN_bn2dec(bntmp)) == NULL)
112 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
117 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
119 BIGNUM *bntmp = NULL;
124 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
125 || (strtmp = BN_bn2dec(bntmp)) == NULL)
126 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
131 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
138 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
143 X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
146 if (value[0] == '-') {
152 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
159 ret = BN_hex2bn(&bn, value);
161 ret = BN_dec2bn(&bn, value);
163 if (!ret || value[ret]) {
165 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
169 if (isneg && BN_is_zero(bn))
172 aint = BN_to_ASN1_INTEGER(bn, NULL);
175 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
176 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
180 aint->type |= V_ASN1_NEG;
184 int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
185 STACK_OF(CONF_VALUE) **extlist)
192 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
194 ret = X509V3_add_value(name, strtmp, extlist);
195 OPENSSL_free(strtmp);
199 int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
203 if ((btmp = value->value) == NULL)
205 if (strcmp(btmp, "TRUE") == 0
206 || strcmp(btmp, "true") == 0
207 || strcmp(btmp, "Y") == 0
208 || strcmp(btmp, "y") == 0
209 || strcmp(btmp, "YES") == 0
210 || strcmp(btmp, "yes") == 0) {
214 if (strcmp(btmp, "FALSE") == 0
215 || strcmp(btmp, "false") == 0
216 || strcmp(btmp, "N") == 0
217 || strcmp(btmp, "n") == 0
218 || strcmp(btmp, "NO") == 0
219 || strcmp(btmp, "no") == 0) {
224 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
225 X509V3_R_INVALID_BOOLEAN_STRING);
226 X509V3_conf_err(value);
230 int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
234 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
235 X509V3_conf_err(value);
249 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
253 STACK_OF(CONF_VALUE) *values = NULL;
256 /* We are going to modify the line so copy it first */
257 linebuf = OPENSSL_strdup(line);
258 if (linebuf == NULL) {
259 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
264 /* Go through all characters */
265 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
273 ntmp = strip_spaces(q);
275 X509V3err(X509V3_F_X509V3_PARSE_LIST,
276 X509V3_R_INVALID_NULL_NAME);
280 } else if (c == ',') {
282 ntmp = strip_spaces(q);
285 X509V3err(X509V3_F_X509V3_PARSE_LIST,
286 X509V3_R_INVALID_NULL_NAME);
289 X509V3_add_value(ntmp, NULL, &values);
297 vtmp = strip_spaces(q);
299 X509V3err(X509V3_F_X509V3_PARSE_LIST,
300 X509V3_R_INVALID_NULL_VALUE);
303 X509V3_add_value(ntmp, vtmp, &values);
311 if (state == HDR_VALUE) {
312 vtmp = strip_spaces(q);
314 X509V3err(X509V3_F_X509V3_PARSE_LIST,
315 X509V3_R_INVALID_NULL_VALUE);
318 X509V3_add_value(ntmp, vtmp, &values);
320 ntmp = strip_spaces(q);
322 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
325 X509V3_add_value(ntmp, NULL, &values);
327 OPENSSL_free(linebuf);
331 OPENSSL_free(linebuf);
332 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
337 /* Delete leading and trailing spaces from a string */
338 static char *strip_spaces(char *name)
341 /* Skip over leading spaces */
343 while (*p && ossl_isspace(*p))
347 q = p + strlen(p) - 1;
348 while ((q != p) && ossl_isspace(*q))
359 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
362 int name_cmp(const char *name, const char *cmp)
367 if ((ret = strncmp(name, cmp, len)))
370 if (!c || (c == '.'))
375 static int sk_strcmp(const char *const *a, const char *const *b)
377 return strcmp(*a, *b);
380 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
383 STACK_OF(OPENSSL_STRING) *ret;
385 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
386 ret = get_email(X509_get_subject_name(x), gens);
387 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
391 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
393 AUTHORITY_INFO_ACCESS *info;
394 STACK_OF(OPENSSL_STRING) *ret = NULL;
397 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
400 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
401 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
402 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
403 if (ad->location->type == GEN_URI) {
405 (&ret, ad->location->d.uniformResourceIdentifier))
410 AUTHORITY_INFO_ACCESS_free(info);
414 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
417 STACK_OF(X509_EXTENSION) *exts;
418 STACK_OF(OPENSSL_STRING) *ret;
420 exts = X509_REQ_get_extensions(x);
421 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
422 ret = get_email(X509_REQ_get_subject_name(x), gens);
423 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
424 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
428 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
431 STACK_OF(OPENSSL_STRING) *ret = NULL;
433 const ASN1_IA5STRING *email;
437 /* Now add any email address(es) to STACK */
438 /* First supplied X509_NAME */
439 while ((i = X509_NAME_get_index_by_NID(name,
440 NID_pkcs9_emailAddress, i)) >= 0) {
441 ne = X509_NAME_get_entry(name, i);
442 email = X509_NAME_ENTRY_get_data(ne);
443 if (!append_ia5(&ret, email))
446 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
447 gen = sk_GENERAL_NAME_value(gens, i);
448 if (gen->type != GEN_EMAIL)
450 if (!append_ia5(&ret, gen->d.ia5))
456 static void str_free(OPENSSL_STRING str)
461 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email)
464 /* First some sanity checks */
465 if (email->type != V_ASN1_IA5STRING)
467 if (!email->data || !email->length)
470 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
473 /* Don't add duplicates */
474 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
476 emtmp = OPENSSL_strdup((char *)email->data);
477 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
478 OPENSSL_free(emtmp); /* free on push failure */
479 X509_email_free(*sk);
486 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
488 sk_OPENSSL_STRING_pop_free(sk, str_free);
491 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
492 const unsigned char *subject, size_t subject_len,
495 /* Skip pattern prefix to match "wildcard" subject */
496 static void skip_prefix(const unsigned char **p, size_t *plen,
500 const unsigned char *pattern = *p;
501 size_t pattern_len = *plen;
504 * If subject starts with a leading '.' followed by more octets, and
505 * pattern is longer, compare just an equal-length suffix with the
506 * full subject (starting at the '.'), provided the prefix contains
509 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
512 while (pattern_len > subject_len && *pattern) {
513 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
520 /* Skip if entire prefix acceptable */
521 if (pattern_len == subject_len) {
527 /* Compare while ASCII ignoring case. */
528 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
529 const unsigned char *subject, size_t subject_len,
532 skip_prefix(&pattern, &pattern_len, subject_len, flags);
533 if (pattern_len != subject_len)
535 while (pattern_len) {
536 unsigned char l = *pattern;
537 unsigned char r = *subject;
538 /* The pattern must not contain NUL characters. */
542 if ('A' <= l && l <= 'Z')
544 if ('A' <= r && r <= 'Z')
556 /* Compare using memcmp. */
557 static int equal_case(const unsigned char *pattern, size_t pattern_len,
558 const unsigned char *subject, size_t subject_len,
561 skip_prefix(&pattern, &pattern_len, subject_len, flags);
562 if (pattern_len != subject_len)
564 return !memcmp(pattern, subject, pattern_len);
568 * RFC 5280, section 7.5, requires that only the domain is compared in a
569 * case-insensitive manner.
571 static int equal_email(const unsigned char *a, size_t a_len,
572 const unsigned char *b, size_t b_len,
573 unsigned int unused_flags)
579 * We search backwards for the '@' character, so that we do not have to
580 * deal with quoted local-parts. The domain part is compared in a
581 * case-insensitive manner.
585 if (a[i] == '@' || b[i] == '@') {
586 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
593 return equal_case(a, i, b, i, 0);
597 * Compare the prefix and suffix with the subject, and check that the
598 * characters in-between are valid.
600 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
601 const unsigned char *suffix, size_t suffix_len,
602 const unsigned char *subject, size_t subject_len,
605 const unsigned char *wildcard_start;
606 const unsigned char *wildcard_end;
607 const unsigned char *p;
611 if (subject_len < prefix_len + suffix_len)
613 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
615 wildcard_start = subject + prefix_len;
616 wildcard_end = subject + (subject_len - suffix_len);
617 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
620 * If the wildcard makes up the entire first label, it must match at
621 * least one character.
623 if (prefix_len == 0 && *suffix == '.') {
624 if (wildcard_start == wildcard_end)
627 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
630 /* IDNA labels cannot match partial wildcards */
632 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
634 /* The wildcard may match a literal '*' */
635 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
638 * Check that the part matched by the wildcard contains only
639 * permitted characters and only matches a single label unless
640 * allow_multi is set.
642 for (p = wildcard_start; p != wildcard_end; ++p)
643 if (!(('0' <= *p && *p <= '9') ||
644 ('A' <= *p && *p <= 'Z') ||
645 ('a' <= *p && *p <= 'z') ||
646 *p == '-' || (allow_multi && *p == '.')))
651 #define LABEL_START (1 << 0)
652 #define LABEL_END (1 << 1)
653 #define LABEL_HYPHEN (1 << 2)
654 #define LABEL_IDNA (1 << 3)
656 static const unsigned char *valid_star(const unsigned char *p, size_t len,
659 const unsigned char *star = 0;
661 int state = LABEL_START;
663 for (i = 0; i < len; ++i) {
665 * Locate first and only legal wildcard, either at the start
666 * or end of a non-IDNA first and not final label.
669 int atstart = (state & LABEL_START);
670 int atend = (i == len - 1 || p[i + 1] == '.');
672 * At most one wildcard per pattern.
673 * No wildcards in IDNA labels.
674 * No wildcards after the first label.
676 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
678 /* Only full-label '*.example.com' wildcards? */
679 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
680 && (!atstart || !atend))
682 /* No 'foo*bar' wildcards */
683 if (!atstart && !atend)
686 state &= ~LABEL_START;
687 } else if (('a' <= p[i] && p[i] <= 'z')
688 || ('A' <= p[i] && p[i] <= 'Z')
689 || ('0' <= p[i] && p[i] <= '9')) {
690 if ((state & LABEL_START) != 0
691 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
693 state &= ~(LABEL_HYPHEN | LABEL_START);
694 } else if (p[i] == '.') {
695 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
699 } else if (p[i] == '-') {
700 /* no domain/subdomain starts with '-' */
701 if ((state & LABEL_START) != 0)
703 state |= LABEL_HYPHEN;
709 * The final label must not end in a hyphen or ".", and
710 * there must be at least two dots after the star.
712 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
717 /* Compare using wildcards. */
718 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
719 const unsigned char *subject, size_t subject_len,
722 const unsigned char *star = NULL;
725 * Subject names starting with '.' can only match a wildcard pattern
726 * via a subject sub-domain pattern suffix match.
728 if (!(subject_len > 1 && subject[0] == '.'))
729 star = valid_star(pattern, pattern_len, flags);
731 return equal_nocase(pattern, pattern_len,
732 subject, subject_len, flags);
733 return wildcard_match(pattern, star - pattern,
734 star + 1, (pattern + pattern_len) - star - 1,
735 subject, subject_len, flags);
739 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
740 * cmp_type > 0 only compare if string matches the type, otherwise convert it
744 static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
745 unsigned int flags, const char *b, size_t blen,
750 if (!a->data || !a->length)
753 if (cmp_type != a->type)
755 if (cmp_type == V_ASN1_IA5STRING)
756 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
757 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
759 if (rv > 0 && peername)
760 *peername = OPENSSL_strndup((char *)a->data, a->length);
764 astrlen = ASN1_STRING_to_UTF8(&astr, a);
767 * -1 could be an internal malloc failure or a decoding error from
768 * malformed input; we can't distinguish.
772 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
773 if (rv > 0 && peername)
774 *peername = OPENSSL_strndup((char *)astr, astrlen);
780 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
781 unsigned int flags, int check_type, char **peername)
783 GENERAL_NAMES *gens = NULL;
784 X509_NAME *name = NULL;
786 int cnid = NID_undef;
792 /* See below, this flag is internal-only */
793 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
794 if (check_type == GEN_EMAIL) {
795 cnid = NID_pkcs9_emailAddress;
796 alt_type = V_ASN1_IA5STRING;
798 } else if (check_type == GEN_DNS) {
799 cnid = NID_commonName;
800 /* Implicit client-side DNS sub-domain pattern */
801 if (chklen > 1 && chk[0] == '.')
802 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
803 alt_type = V_ASN1_IA5STRING;
804 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
805 equal = equal_nocase;
807 equal = equal_wildcard;
809 alt_type = V_ASN1_OCTET_STRING;
814 chklen = strlen(chk);
816 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
818 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
821 gen = sk_GENERAL_NAME_value(gens, i);
822 if (gen->type != check_type)
825 if (check_type == GEN_EMAIL)
826 cstr = gen->d.rfc822Name;
827 else if (check_type == GEN_DNS)
828 cstr = gen->d.dNSName;
830 cstr = gen->d.iPAddress;
831 /* Positive on success, negative on error! */
832 if ((rv = do_check_string(cstr, alt_type, equal, flags,
833 chk, chklen, peername)) != 0)
836 GENERAL_NAMES_free(gens);
839 if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
843 /* We're done if CN-ID is not pertinent */
844 if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
848 name = X509_get_subject_name(x);
849 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
850 const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
851 const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
853 /* Positive on success, negative on error! */
854 if ((rv = do_check_string(str, -1, equal, flags,
855 chk, chklen, peername)) != 0)
861 int X509_check_host(X509 *x, const char *chk, size_t chklen,
862 unsigned int flags, char **peername)
867 * Embedded NULs are disallowed, except as the last character of a
868 * string of length 2 or more (tolerate caller including terminating
869 * NUL in string length).
872 chklen = strlen(chk);
873 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
875 if (chklen > 1 && chk[chklen - 1] == '\0')
877 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
880 int X509_check_email(X509 *x, const char *chk, size_t chklen,
886 * Embedded NULs are disallowed, except as the last character of a
887 * string of length 2 or more (tolerate caller including terminating
888 * NUL in string length).
891 chklen = strlen((char *)chk);
892 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
894 if (chklen > 1 && chk[chklen - 1] == '\0')
896 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
899 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
904 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
907 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
909 unsigned char ipout[16];
914 iplen = (size_t)a2i_ipadd(ipout, ipasc);
917 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
921 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
925 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
927 unsigned char ipout[16];
928 ASN1_OCTET_STRING *ret;
931 /* If string contains a ':' assume IPv6 */
933 iplen = a2i_ipadd(ipout, ipasc);
938 ret = ASN1_OCTET_STRING_new();
941 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
942 ASN1_OCTET_STRING_free(ret);
948 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
950 ASN1_OCTET_STRING *ret = NULL;
951 unsigned char ipout[32];
952 char *iptmp = NULL, *p;
954 p = strchr(ipasc, '/');
957 iptmp = OPENSSL_strdup(ipasc);
960 p = iptmp + (p - ipasc);
963 iplen1 = a2i_ipadd(ipout, iptmp);
968 iplen2 = a2i_ipadd(ipout + iplen1, p);
973 if (!iplen2 || (iplen1 != iplen2))
976 ret = ASN1_OCTET_STRING_new();
979 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
986 ASN1_OCTET_STRING_free(ret);
990 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
992 /* If string contains a ':' assume IPv6 */
994 if (strchr(ipasc, ':')) {
995 if (!ipv6_from_asc(ipout, ipasc))
999 if (!ipv4_from_asc(ipout, ipasc))
1005 static int ipv4_from_asc(unsigned char *v4, const char *in)
1008 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1010 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1011 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1021 /* Temporary store for IPV6 output */
1022 unsigned char tmp[16];
1023 /* Total number of bytes in tmp */
1025 /* The position of a zero (corresponding to '::') */
1027 /* Number of zeroes */
1031 static int ipv6_from_asc(unsigned char *v6, const char *in)
1035 v6stat.zero_pos = -1;
1036 v6stat.zero_cnt = 0;
1038 * Treat the IPv6 representation as a list of values separated by ':'.
1039 * The presence of a '::' will parse as one, two or three zero length
1042 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1045 /* Now for some sanity checks */
1047 if (v6stat.zero_pos == -1) {
1048 /* If no '::' must have exactly 16 bytes */
1049 if (v6stat.total != 16)
1052 /* If '::' must have less than 16 bytes */
1053 if (v6stat.total == 16)
1055 /* More than three zeroes is an error */
1056 if (v6stat.zero_cnt > 3)
1058 /* Can only have three zeroes if nothing else present */
1059 else if (v6stat.zero_cnt == 3) {
1060 if (v6stat.total > 0)
1063 /* Can only have two zeroes if at start or end */
1064 else if (v6stat.zero_cnt == 2) {
1065 if ((v6stat.zero_pos != 0)
1066 && (v6stat.zero_pos != v6stat.total))
1069 /* Can only have one zero if *not* start or end */
1071 if ((v6stat.zero_pos == 0)
1072 || (v6stat.zero_pos == v6stat.total))
1079 if (v6stat.zero_pos >= 0) {
1080 /* Copy initial part */
1081 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1083 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1084 /* Copy final part */
1085 if (v6stat.total != v6stat.zero_pos)
1086 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1087 v6stat.tmp + v6stat.zero_pos,
1088 v6stat.total - v6stat.zero_pos);
1090 memcpy(v6, v6stat.tmp, 16);
1095 static int ipv6_cb(const char *elem, int len, void *usr)
1098 /* Error if 16 bytes written */
1102 /* Zero length element, corresponds to '::' */
1103 if (s->zero_pos == -1)
1104 s->zero_pos = s->total;
1105 /* If we've already got a :: its an error */
1106 else if (s->zero_pos != s->total)
1110 /* If more than 4 characters could be final a.b.c.d form */
1112 /* Need at least 4 bytes left */
1115 /* Must be end of string */
1118 if (!ipv4_from_asc(s->tmp + s->total, elem))
1122 if (!ipv6_hex(s->tmp + s->total, elem, len))
1131 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1134 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1137 unsigned int num = 0;
1145 x = OPENSSL_hexchar2int(c);
1151 out[1] = num & 0xff;
1155 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1156 unsigned long chtype)
1159 int i, mval, spec_char, plus_char;
1164 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1165 v = sk_CONF_VALUE_value(dn_sk, i);
1168 * Skip past any leading X. X: X, etc to allow for multiple instances
1170 for (p = type; *p; p++) {
1171 #ifndef CHARSET_EBCDIC
1172 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1174 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1175 || (*p == os_toascii['.']));
1184 #ifndef CHARSET_EBCDIC
1185 plus_char = (*type == '+');
1187 plus_char = (*type == os_toascii['+']);
1194 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1195 (unsigned char *)v->value, -1, -1,