+int name_cmp(const char *name, const char *cmp)
+{
+ int len, ret;
+ char c;
+ len = strlen(cmp);
+ if ((ret = strncmp(name, cmp, len)))
+ return ret;
+ c = name[len];
+ if (!c || (c == '.'))
+ return 0;
+ return 1;
+}
+
+static int sk_strcmp(const char *const *a, const char *const *b)
+{
+ return strcmp(*a, *b);
+}
+
+STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
+{
+ GENERAL_NAMES *gens;
+ STACK_OF(OPENSSL_STRING) *ret;
+
+ gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
+ ret = get_email(X509_get_subject_name(x), gens);
+ sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
+ return ret;
+}
+
+STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
+{
+ AUTHORITY_INFO_ACCESS *info;
+ STACK_OF(OPENSSL_STRING) *ret = NULL;
+ int i;
+
+ info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
+ if (!info)
+ return NULL;
+ for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
+ ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
+ if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
+ if (ad->location->type == GEN_URI) {
+ if (!append_ia5
+ (&ret, ad->location->d.uniformResourceIdentifier))
+ break;
+ }
+ }
+ }
+ AUTHORITY_INFO_ACCESS_free(info);
+ return ret;
+}
+
+STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
+{
+ GENERAL_NAMES *gens;
+ STACK_OF(X509_EXTENSION) *exts;
+ STACK_OF(OPENSSL_STRING) *ret;
+
+ exts = X509_REQ_get_extensions(x);
+ gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
+ ret = get_email(X509_REQ_get_subject_name(x), gens);
+ sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
+ sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
+ return ret;
+}
+
+static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
+ GENERAL_NAMES *gens)
+{
+ STACK_OF(OPENSSL_STRING) *ret = NULL;
+ X509_NAME_ENTRY *ne;
+ ASN1_IA5STRING *email;
+ GENERAL_NAME *gen;
+ int i;
+ /* Now add any email address(es) to STACK */
+ i = -1;
+ /* First supplied X509_NAME */
+ while ((i = X509_NAME_get_index_by_NID(name,
+ NID_pkcs9_emailAddress, i)) >= 0) {
+ ne = X509_NAME_get_entry(name, i);
+ email = X509_NAME_ENTRY_get_data(ne);
+ if (!append_ia5(&ret, email))
+ return NULL;
+ }
+ for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
+ gen = sk_GENERAL_NAME_value(gens, i);
+ if (gen->type != GEN_EMAIL)
+ continue;
+ if (!append_ia5(&ret, gen->d.ia5))
+ return NULL;
+ }
+ return ret;
+}
+
+static void str_free(OPENSSL_STRING str)
+{
+ OPENSSL_free(str);
+}
+
+static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email)
+{
+ char *emtmp;
+ /* First some sanity checks */
+ if (email->type != V_ASN1_IA5STRING)
+ return 1;
+ if (!email->data || !email->length)
+ return 1;
+ if (*sk == NULL)
+ *sk = sk_OPENSSL_STRING_new(sk_strcmp);
+ if (*sk == NULL)
+ return 0;
+ /* Don't add duplicates */
+ if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
+ return 1;
+ emtmp = OPENSSL_strdup((char *)email->data);
+ if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
+ X509_email_free(*sk);
+ *sk = NULL;
+ return 0;
+ }
+ return 1;
+}
+
+void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
+{
+ sk_OPENSSL_STRING_pop_free(sk, str_free);
+}
+
+typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags);
+
+/* Skip pattern prefix to match "wildcard" subject */
+static void skip_prefix(const unsigned char **p, size_t *plen,
+ size_t subject_len,
+ unsigned int flags)
+{
+ const unsigned char *pattern = *p;
+ size_t pattern_len = *plen;
+
+ /*
+ * If subject starts with a leading '.' followed by more octets, and
+ * pattern is longer, compare just an equal-length suffix with the
+ * full subject (starting at the '.'), provided the prefix contains
+ * no NULs.
+ */
+ if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
+ return;
+
+ while (pattern_len > subject_len && *pattern) {
+ if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
+ *pattern == '.')
+ break;
+ ++pattern;
+ --pattern_len;
+ }
+
+ /* Skip if entire prefix acceptable */
+ if (pattern_len == subject_len) {
+ *p = pattern;
+ *plen = pattern_len;
+ }
+}
+
+/* Compare while ASCII ignoring case. */
+static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+{
+ skip_prefix(&pattern, &pattern_len, subject_len, flags);
+ if (pattern_len != subject_len)
+ return 0;
+ while (pattern_len) {
+ unsigned char l = *pattern;
+ unsigned char r = *subject;
+ /* The pattern must not contain NUL characters. */
+ if (l == 0)
+ return 0;
+ if (l != r) {
+ if ('A' <= l && l <= 'Z')
+ l = (l - 'A') + 'a';
+ if ('A' <= r && r <= 'Z')
+ r = (r - 'A') + 'a';
+ if (l != r)
+ return 0;
+ }
+ ++pattern;
+ ++subject;
+ --pattern_len;
+ }
+ return 1;
+}
+
+/* Compare using memcmp. */
+static int equal_case(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+{
+ skip_prefix(&pattern, &pattern_len, subject_len, flags);
+ if (pattern_len != subject_len)
+ return 0;
+ return !memcmp(pattern, subject, pattern_len);
+}
+
+/*
+ * RFC 5280, section 7.5, requires that only the domain is compared in a
+ * case-insensitive manner.
+ */
+static int equal_email(const unsigned char *a, size_t a_len,
+ const unsigned char *b, size_t b_len,
+ unsigned int unused_flags)
+{
+ size_t i = a_len;
+ if (a_len != b_len)
+ return 0;
+ /*
+ * We search backwards for the '@' character, so that we do not have to
+ * deal with quoted local-parts. The domain part is compared in a
+ * case-insensitive manner.
+ */
+ while (i > 0) {
+ --i;
+ if (a[i] == '@' || b[i] == '@') {
+ if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
+ return 0;
+ break;
+ }
+ }
+ if (i == 0)
+ i = a_len;
+ return equal_case(a, i, b, i, 0);
+}
+
+/*
+ * Compare the prefix and suffix with the subject, and check that the
+ * characters in-between are valid.
+ */
+static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
+ const unsigned char *suffix, size_t suffix_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+{
+ const unsigned char *wildcard_start;
+ const unsigned char *wildcard_end;
+ const unsigned char *p;
+ int allow_multi = 0;
+ int allow_idna = 0;
+
+ if (subject_len < prefix_len + suffix_len)
+ return 0;
+ if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
+ return 0;
+ wildcard_start = subject + prefix_len;
+ wildcard_end = subject + (subject_len - suffix_len);
+ if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
+ return 0;
+ /*
+ * If the wildcard makes up the entire first label, it must match at
+ * least one character.
+ */
+ if (prefix_len == 0 && *suffix == '.') {
+ if (wildcard_start == wildcard_end)
+ return 0;
+ allow_idna = 1;
+ if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
+ allow_multi = 1;
+ }
+ /* IDNA labels cannot match partial wildcards */
+ if (!allow_idna &&
+ subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
+ return 0;
+ /* The wildcard may match a literal '*' */
+ if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
+ return 1;
+ /*
+ * Check that the part matched by the wildcard contains only
+ * permitted characters and only matches a single label unless
+ * allow_multi is set.
+ */
+ for (p = wildcard_start; p != wildcard_end; ++p)
+ if (!(('0' <= *p && *p <= '9') ||
+ ('A' <= *p && *p <= 'Z') ||
+ ('a' <= *p && *p <= 'z') ||
+ *p == '-' || (allow_multi && *p == '.')))
+ return 0;
+ return 1;
+}
+
+#define LABEL_START (1 << 0)
+#define LABEL_END (1 << 1)
+#define LABEL_HYPHEN (1 << 2)
+#define LABEL_IDNA (1 << 3)
+
+static const unsigned char *valid_star(const unsigned char *p, size_t len,
+ unsigned int flags)
+{
+ const unsigned char *star = 0;
+ size_t i;
+ int state = LABEL_START;
+ int dots = 0;
+ for (i = 0; i < len; ++i) {
+ /*
+ * Locate first and only legal wildcard, either at the start
+ * or end of a non-IDNA first and not final label.
+ */
+ if (p[i] == '*') {
+ int atstart = (state & LABEL_START);
+ int atend = (i == len - 1 || p[i + 1] == '.');
+ /*-
+ * At most one wildcard per pattern.
+ * No wildcards in IDNA labels.
+ * No wildcards after the first label.
+ */
+ if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
+ return NULL;
+ /* Only full-label '*.example.com' wildcards? */
+ if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
+ && (!atstart || !atend))
+ return NULL;
+ /* No 'foo*bar' wildcards */
+ if (!atstart && !atend)
+ return NULL;
+ star = &p[i];
+ state &= ~LABEL_START;
+ } else if (('a' <= p[i] && p[i] <= 'z')
+ || ('A' <= p[i] && p[i] <= 'Z')
+ || ('0' <= p[i] && p[i] <= '9')) {
+ if ((state & LABEL_START) != 0
+ && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
+ state |= LABEL_IDNA;
+ state &= ~(LABEL_HYPHEN | LABEL_START);
+ } else if (p[i] == '.') {
+ if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
+ return NULL;
+ state = LABEL_START;
+ ++dots;
+ } else if (p[i] == '-') {
+ /* no domain/subdomain starts with '-' */
+ if ((state & LABEL_START) != 0)
+ return NULL;
+ state |= LABEL_HYPHEN;
+ } else
+ return NULL;
+ }
+
+ /*
+ * The final label must not end in a hyphen or ".", and
+ * there must be at least two dots after the star.
+ */
+ if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
+ return NULL;
+ return star;
+}
+
+/* Compare using wildcards. */
+static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+{
+ const unsigned char *star = NULL;
+
+ /*
+ * Subject names starting with '.' can only match a wildcard pattern
+ * via a subject sub-domain pattern suffix match.
+ */
+ if (!(subject_len > 1 && subject[0] == '.'))
+ star = valid_star(pattern, pattern_len, flags);
+ if (star == NULL)
+ return equal_nocase(pattern, pattern_len,
+ subject, subject_len, flags);
+ return wildcard_match(pattern, star - pattern,
+ star + 1, (pattern + pattern_len) - star - 1,
+ subject, subject_len, flags);
+}
+
+/*
+ * Compare an ASN1_STRING to a supplied string. If they match return 1. If
+ * cmp_type > 0 only compare if string matches the type, otherwise convert it
+ * to UTF8.