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/ctype.h"
14 #include "internal/cryptlib.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;
42 if (name && (tname = OPENSSL_strdup(name)) == NULL)
44 if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
46 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
48 if (*extlist == NULL && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
53 if (!sk_CONF_VALUE_push(*extlist, vtmp))
57 X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
64 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
65 STACK_OF(CONF_VALUE) **extlist)
67 return X509V3_add_value(name, (const char *)value, extlist);
70 /* Free function for STACK_OF(CONF_VALUE) */
72 void X509V3_conf_free(CONF_VALUE *conf)
76 OPENSSL_free(conf->name);
77 OPENSSL_free(conf->value);
78 OPENSSL_free(conf->section);
82 int X509V3_add_value_bool(const char *name, int asn1_bool,
83 STACK_OF(CONF_VALUE) **extlist)
86 return X509V3_add_value(name, "TRUE", extlist);
87 return X509V3_add_value(name, "FALSE", extlist);
90 int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
91 STACK_OF(CONF_VALUE) **extlist)
94 return X509V3_add_value(name, "TRUE", extlist);
98 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
100 BIGNUM *bntmp = NULL;
105 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
106 || (strtmp = BN_bn2dec(bntmp)) == NULL)
107 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
112 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
114 BIGNUM *bntmp = NULL;
119 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
120 || (strtmp = BN_bn2dec(bntmp)) == NULL)
121 X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
126 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
133 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
138 X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
141 if (value[0] == '-') {
147 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
154 ret = BN_hex2bn(&bn, value);
156 ret = BN_dec2bn(&bn, value);
158 if (!ret || value[ret]) {
160 X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
164 if (isneg && BN_is_zero(bn))
167 aint = BN_to_ASN1_INTEGER(bn, NULL);
170 X509V3err(X509V3_F_S2I_ASN1_INTEGER,
171 X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
175 aint->type |= V_ASN1_NEG;
179 int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
180 STACK_OF(CONF_VALUE) **extlist)
187 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
189 ret = X509V3_add_value(name, strtmp, extlist);
190 OPENSSL_free(strtmp);
194 int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
198 if ((btmp = value->value) == NULL)
200 if (strcmp(btmp, "TRUE") == 0
201 || strcmp(btmp, "true") == 0
202 || strcmp(btmp, "Y") == 0
203 || strcmp(btmp, "y") == 0
204 || strcmp(btmp, "YES") == 0
205 || strcmp(btmp, "yes") == 0) {
209 if (strcmp(btmp, "FALSE") == 0
210 || strcmp(btmp, "false") == 0
211 || strcmp(btmp, "N") == 0
212 || strcmp(btmp, "n") == 0
213 || strcmp(btmp, "NO") == 0
214 || strcmp(btmp, "no") == 0) {
219 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
220 X509V3_R_INVALID_BOOLEAN_STRING);
221 X509V3_conf_err(value);
225 int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
229 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
230 X509V3_conf_err(value);
244 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
248 STACK_OF(CONF_VALUE) *values = NULL;
251 /* We are going to modify the line so copy it first */
252 linebuf = OPENSSL_strdup(line);
253 if (linebuf == NULL) {
254 X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
259 /* Go through all characters */
260 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
268 ntmp = strip_spaces(q);
270 X509V3err(X509V3_F_X509V3_PARSE_LIST,
271 X509V3_R_INVALID_NULL_NAME);
275 } else if (c == ',') {
277 ntmp = strip_spaces(q);
280 X509V3err(X509V3_F_X509V3_PARSE_LIST,
281 X509V3_R_INVALID_NULL_NAME);
284 X509V3_add_value(ntmp, NULL, &values);
292 vtmp = strip_spaces(q);
294 X509V3err(X509V3_F_X509V3_PARSE_LIST,
295 X509V3_R_INVALID_NULL_VALUE);
298 X509V3_add_value(ntmp, vtmp, &values);
306 if (state == HDR_VALUE) {
307 vtmp = strip_spaces(q);
309 X509V3err(X509V3_F_X509V3_PARSE_LIST,
310 X509V3_R_INVALID_NULL_VALUE);
313 X509V3_add_value(ntmp, vtmp, &values);
315 ntmp = strip_spaces(q);
317 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
320 X509V3_add_value(ntmp, NULL, &values);
322 OPENSSL_free(linebuf);
326 OPENSSL_free(linebuf);
327 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
332 /* Delete leading and trailing spaces from a string */
333 static char *strip_spaces(char *name)
336 /* Skip over leading spaces */
338 while (*p && ossl_isspace(*p))
342 q = p + strlen(p) - 1;
343 while ((q != p) && ossl_isspace(*q))
354 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
357 int name_cmp(const char *name, const char *cmp)
362 if ((ret = strncmp(name, cmp, len)))
365 if (!c || (c == '.'))
370 static int sk_strcmp(const char *const *a, const char *const *b)
372 return strcmp(*a, *b);
375 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
378 STACK_OF(OPENSSL_STRING) *ret;
380 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
381 ret = get_email(X509_get_subject_name(x), gens);
382 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
386 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
388 AUTHORITY_INFO_ACCESS *info;
389 STACK_OF(OPENSSL_STRING) *ret = NULL;
392 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
395 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
396 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
397 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
398 if (ad->location->type == GEN_URI) {
400 (&ret, ad->location->d.uniformResourceIdentifier))
405 AUTHORITY_INFO_ACCESS_free(info);
409 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
412 STACK_OF(X509_EXTENSION) *exts;
413 STACK_OF(OPENSSL_STRING) *ret;
415 exts = X509_REQ_get_extensions(x);
416 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
417 ret = get_email(X509_REQ_get_subject_name(x), gens);
418 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
419 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
423 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
426 STACK_OF(OPENSSL_STRING) *ret = NULL;
428 const ASN1_IA5STRING *email;
432 /* Now add any email address(es) to STACK */
433 /* First supplied X509_NAME */
434 while ((i = X509_NAME_get_index_by_NID(name,
435 NID_pkcs9_emailAddress, i)) >= 0) {
436 ne = X509_NAME_get_entry(name, i);
437 email = X509_NAME_ENTRY_get_data(ne);
438 if (!append_ia5(&ret, email))
441 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
442 gen = sk_GENERAL_NAME_value(gens, i);
443 if (gen->type != GEN_EMAIL)
445 if (!append_ia5(&ret, gen->d.ia5))
451 static void str_free(OPENSSL_STRING str)
456 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email)
459 /* First some sanity checks */
460 if (email->type != V_ASN1_IA5STRING)
462 if (!email->data || !email->length)
465 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
468 /* Don't add duplicates */
469 if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
471 emtmp = OPENSSL_strdup((char *)email->data);
472 if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
473 OPENSSL_free(emtmp); /* free on push failure */
474 X509_email_free(*sk);
481 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
483 sk_OPENSSL_STRING_pop_free(sk, str_free);
486 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
487 const unsigned char *subject, size_t subject_len,
490 /* Skip pattern prefix to match "wildcard" subject */
491 static void skip_prefix(const unsigned char **p, size_t *plen,
495 const unsigned char *pattern = *p;
496 size_t pattern_len = *plen;
499 * If subject starts with a leading '.' followed by more octets, and
500 * pattern is longer, compare just an equal-length suffix with the
501 * full subject (starting at the '.'), provided the prefix contains
504 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
507 while (pattern_len > subject_len && *pattern) {
508 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
515 /* Skip if entire prefix acceptable */
516 if (pattern_len == subject_len) {
522 /* Compare while ASCII ignoring case. */
523 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
524 const unsigned char *subject, size_t subject_len,
527 skip_prefix(&pattern, &pattern_len, subject_len, flags);
528 if (pattern_len != subject_len)
530 while (pattern_len) {
531 unsigned char l = *pattern;
532 unsigned char r = *subject;
533 /* The pattern must not contain NUL characters. */
537 if ('A' <= l && l <= 'Z')
539 if ('A' <= r && r <= 'Z')
551 /* Compare using memcmp. */
552 static int equal_case(const unsigned char *pattern, size_t pattern_len,
553 const unsigned char *subject, size_t subject_len,
556 skip_prefix(&pattern, &pattern_len, subject_len, flags);
557 if (pattern_len != subject_len)
559 return !memcmp(pattern, subject, pattern_len);
563 * RFC 5280, section 7.5, requires that only the domain is compared in a
564 * case-insensitive manner.
566 static int equal_email(const unsigned char *a, size_t a_len,
567 const unsigned char *b, size_t b_len,
568 unsigned int unused_flags)
574 * We search backwards for the '@' character, so that we do not have to
575 * deal with quoted local-parts. The domain part is compared in a
576 * case-insensitive manner.
580 if (a[i] == '@' || b[i] == '@') {
581 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
588 return equal_case(a, i, b, i, 0);
592 * Compare the prefix and suffix with the subject, and check that the
593 * characters in-between are valid.
595 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
596 const unsigned char *suffix, size_t suffix_len,
597 const unsigned char *subject, size_t subject_len,
600 const unsigned char *wildcard_start;
601 const unsigned char *wildcard_end;
602 const unsigned char *p;
606 if (subject_len < prefix_len + suffix_len)
608 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
610 wildcard_start = subject + prefix_len;
611 wildcard_end = subject + (subject_len - suffix_len);
612 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
615 * If the wildcard makes up the entire first label, it must match at
616 * least one character.
618 if (prefix_len == 0 && *suffix == '.') {
619 if (wildcard_start == wildcard_end)
622 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
625 /* IDNA labels cannot match partial wildcards */
627 subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
629 /* The wildcard may match a literal '*' */
630 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
633 * Check that the part matched by the wildcard contains only
634 * permitted characters and only matches a single label unless
635 * allow_multi is set.
637 for (p = wildcard_start; p != wildcard_end; ++p)
638 if (!(('0' <= *p && *p <= '9') ||
639 ('A' <= *p && *p <= 'Z') ||
640 ('a' <= *p && *p <= 'z') ||
641 *p == '-' || (allow_multi && *p == '.')))
646 #define LABEL_START (1 << 0)
647 #define LABEL_END (1 << 1)
648 #define LABEL_HYPHEN (1 << 2)
649 #define LABEL_IDNA (1 << 3)
651 static const unsigned char *valid_star(const unsigned char *p, size_t len,
654 const unsigned char *star = 0;
656 int state = LABEL_START;
658 for (i = 0; i < len; ++i) {
660 * Locate first and only legal wildcard, either at the start
661 * or end of a non-IDNA first and not final label.
664 int atstart = (state & LABEL_START);
665 int atend = (i == len - 1 || p[i + 1] == '.');
667 * At most one wildcard per pattern.
668 * No wildcards in IDNA labels.
669 * No wildcards after the first label.
671 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
673 /* Only full-label '*.example.com' wildcards? */
674 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
675 && (!atstart || !atend))
677 /* No 'foo*bar' wildcards */
678 if (!atstart && !atend)
681 state &= ~LABEL_START;
682 } else if (('a' <= p[i] && p[i] <= 'z')
683 || ('A' <= p[i] && p[i] <= 'Z')
684 || ('0' <= p[i] && p[i] <= '9')) {
685 if ((state & LABEL_START) != 0
686 && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
688 state &= ~(LABEL_HYPHEN | LABEL_START);
689 } else if (p[i] == '.') {
690 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
694 } else if (p[i] == '-') {
695 /* no domain/subdomain starts with '-' */
696 if ((state & LABEL_START) != 0)
698 state |= LABEL_HYPHEN;
704 * The final label must not end in a hyphen or ".", and
705 * there must be at least two dots after the star.
707 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
712 /* Compare using wildcards. */
713 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
714 const unsigned char *subject, size_t subject_len,
717 const unsigned char *star = NULL;
720 * Subject names starting with '.' can only match a wildcard pattern
721 * via a subject sub-domain pattern suffix match.
723 if (!(subject_len > 1 && subject[0] == '.'))
724 star = valid_star(pattern, pattern_len, flags);
726 return equal_nocase(pattern, pattern_len,
727 subject, subject_len, flags);
728 return wildcard_match(pattern, star - pattern,
729 star + 1, (pattern + pattern_len) - star - 1,
730 subject, subject_len, flags);
734 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
735 * cmp_type > 0 only compare if string matches the type, otherwise convert it
739 static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
740 unsigned int flags, const char *b, size_t blen,
745 if (!a->data || !a->length)
748 if (cmp_type != a->type)
750 if (cmp_type == V_ASN1_IA5STRING)
751 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
752 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
754 if (rv > 0 && peername)
755 *peername = OPENSSL_strndup((char *)a->data, a->length);
759 astrlen = ASN1_STRING_to_UTF8(&astr, a);
762 * -1 could be an internal malloc failure or a decoding error from
763 * malformed input; we can't distinguish.
767 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
768 if (rv > 0 && peername)
769 *peername = OPENSSL_strndup((char *)astr, astrlen);
775 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
776 unsigned int flags, int check_type, char **peername)
778 GENERAL_NAMES *gens = NULL;
779 X509_NAME *name = NULL;
781 int cnid = NID_undef;
787 /* See below, this flag is internal-only */
788 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
789 if (check_type == GEN_EMAIL) {
790 cnid = NID_pkcs9_emailAddress;
791 alt_type = V_ASN1_IA5STRING;
793 } else if (check_type == GEN_DNS) {
794 cnid = NID_commonName;
795 /* Implicit client-side DNS sub-domain pattern */
796 if (chklen > 1 && chk[0] == '.')
797 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
798 alt_type = V_ASN1_IA5STRING;
799 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
800 equal = equal_nocase;
802 equal = equal_wildcard;
804 alt_type = V_ASN1_OCTET_STRING;
809 chklen = strlen(chk);
811 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
813 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
816 gen = sk_GENERAL_NAME_value(gens, i);
817 if (gen->type != check_type)
820 if (check_type == GEN_EMAIL)
821 cstr = gen->d.rfc822Name;
822 else if (check_type == GEN_DNS)
823 cstr = gen->d.dNSName;
825 cstr = gen->d.iPAddress;
826 /* Positive on success, negative on error! */
827 if ((rv = do_check_string(cstr, alt_type, equal, flags,
828 chk, chklen, peername)) != 0)
831 GENERAL_NAMES_free(gens);
834 if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
838 /* We're done if CN-ID is not pertinent */
839 if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
843 name = X509_get_subject_name(x);
844 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
845 const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
846 const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
848 /* Positive on success, negative on error! */
849 if ((rv = do_check_string(str, -1, equal, flags,
850 chk, chklen, peername)) != 0)
856 int X509_check_host(X509 *x, const char *chk, size_t chklen,
857 unsigned int flags, char **peername)
862 * Embedded NULs are disallowed, except as the last character of a
863 * string of length 2 or more (tolerate caller including terminating
864 * NUL in string length).
867 chklen = strlen(chk);
868 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
870 if (chklen > 1 && chk[chklen - 1] == '\0')
872 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
875 int X509_check_email(X509 *x, const char *chk, size_t chklen,
881 * Embedded NULs are disallowed, except as the last character of a
882 * string of length 2 or more (tolerate caller including terminating
883 * NUL in string length).
886 chklen = strlen((char *)chk);
887 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
889 if (chklen > 1 && chk[chklen - 1] == '\0')
891 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
894 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
899 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
902 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
904 unsigned char ipout[16];
909 iplen = (size_t)a2i_ipadd(ipout, ipasc);
912 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
916 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
920 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
922 unsigned char ipout[16];
923 ASN1_OCTET_STRING *ret;
926 /* If string contains a ':' assume IPv6 */
928 iplen = a2i_ipadd(ipout, ipasc);
933 ret = ASN1_OCTET_STRING_new();
936 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
937 ASN1_OCTET_STRING_free(ret);
943 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
945 ASN1_OCTET_STRING *ret = NULL;
946 unsigned char ipout[32];
947 char *iptmp = NULL, *p;
949 p = strchr(ipasc, '/');
952 iptmp = OPENSSL_strdup(ipasc);
955 p = iptmp + (p - ipasc);
958 iplen1 = a2i_ipadd(ipout, iptmp);
963 iplen2 = a2i_ipadd(ipout + iplen1, p);
968 if (!iplen2 || (iplen1 != iplen2))
971 ret = ASN1_OCTET_STRING_new();
974 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
981 ASN1_OCTET_STRING_free(ret);
985 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
987 /* If string contains a ':' assume IPv6 */
989 if (strchr(ipasc, ':')) {
990 if (!ipv6_from_asc(ipout, ipasc))
994 if (!ipv4_from_asc(ipout, ipasc))
1000 static int ipv4_from_asc(unsigned char *v4, const char *in)
1003 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
1005 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1006 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1016 /* Temporary store for IPV6 output */
1017 unsigned char tmp[16];
1018 /* Total number of bytes in tmp */
1020 /* The position of a zero (corresponding to '::') */
1022 /* Number of zeroes */
1026 static int ipv6_from_asc(unsigned char *v6, const char *in)
1030 v6stat.zero_pos = -1;
1031 v6stat.zero_cnt = 0;
1033 * Treat the IPv6 representation as a list of values separated by ':'.
1034 * The presence of a '::' will parse as one, two or three zero length
1037 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1040 /* Now for some sanity checks */
1042 if (v6stat.zero_pos == -1) {
1043 /* If no '::' must have exactly 16 bytes */
1044 if (v6stat.total != 16)
1047 /* If '::' must have less than 16 bytes */
1048 if (v6stat.total == 16)
1050 /* More than three zeroes is an error */
1051 if (v6stat.zero_cnt > 3)
1053 /* Can only have three zeroes if nothing else present */
1054 else if (v6stat.zero_cnt == 3) {
1055 if (v6stat.total > 0)
1058 /* Can only have two zeroes if at start or end */
1059 else if (v6stat.zero_cnt == 2) {
1060 if ((v6stat.zero_pos != 0)
1061 && (v6stat.zero_pos != v6stat.total))
1064 /* Can only have one zero if *not* start or end */
1066 if ((v6stat.zero_pos == 0)
1067 || (v6stat.zero_pos == v6stat.total))
1074 if (v6stat.zero_pos >= 0) {
1075 /* Copy initial part */
1076 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1078 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1079 /* Copy final part */
1080 if (v6stat.total != v6stat.zero_pos)
1081 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1082 v6stat.tmp + v6stat.zero_pos,
1083 v6stat.total - v6stat.zero_pos);
1085 memcpy(v6, v6stat.tmp, 16);
1090 static int ipv6_cb(const char *elem, int len, void *usr)
1093 /* Error if 16 bytes written */
1097 /* Zero length element, corresponds to '::' */
1098 if (s->zero_pos == -1)
1099 s->zero_pos = s->total;
1100 /* If we've already got a :: its an error */
1101 else if (s->zero_pos != s->total)
1105 /* If more than 4 characters could be final a.b.c.d form */
1107 /* Need at least 4 bytes left */
1110 /* Must be end of string */
1113 if (!ipv4_from_asc(s->tmp + s->total, elem))
1117 if (!ipv6_hex(s->tmp + s->total, elem, len))
1126 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1129 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1132 unsigned int num = 0;
1140 x = OPENSSL_hexchar2int(c);
1146 out[1] = num & 0xff;
1150 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1151 unsigned long chtype)
1154 int i, mval, spec_char, plus_char;
1159 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1160 v = sk_CONF_VALUE_value(dn_sk, i);
1163 * Skip past any leading X. X: X, etc to allow for multiple instances
1165 for (p = type; *p; p++) {
1166 #ifndef CHARSET_EBCDIC
1167 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1169 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1170 || (*p == os_toascii['.']));
1179 #ifndef CHARSET_EBCDIC
1180 plus_char = (*type == '+');
1182 plus_char = (*type == os_toascii['+']);
1189 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1190 (unsigned char *)v->value, -1, -1,