X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fx509v3%2Fv3_utl.c;h=de43c2fb3b2eb74430a7e7dd28e6539b4a6f5f77;hp=7c1d26fc398bb57e15c66e17be5d77c8a48c92d2;hb=94c2f77a62be7079ab1893ab14b18a30157c4532;hpb=96ea4ae91c7fda9fd28a013182b0e8dc67b7ac7d

diff --git a/crypto/x509v3/v3_utl.c b/crypto/x509v3/v3_utl.c
index 7c1d26fc39..de43c2fb3b 100644
--- a/crypto/x509v3/v3_utl.c
+++ b/crypto/x509v3/v3_utl.c
@@ -1,5 +1,5 @@
 /* v3_utl.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project.
  */
 /* ====================================================================
@@ -67,9 +67,9 @@
 
 static char *strip_spaces(char *name);
 static int sk_strcmp(const char * const *a, const char * const *b);
-static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
-static void str_free(void *str);
-static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
+static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens);
+static void str_free(OPENSSL_STRING str);
+static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
 
 static int ipv4_from_asc(unsigned char *v4, const char *in);
 static int ipv6_from_asc(unsigned char *v6, const char *in);
@@ -84,7 +84,7 @@ int X509V3_add_value(const char *name, const char *value,
 	CONF_VALUE *vtmp = NULL;
 	char *tname = NULL, *tvalue = NULL;
 	if(name && !(tname = BUF_strdup(name))) goto err;
-	if(value && !(tvalue = BUF_strdup(value))) goto err;;
+	if(value && !(tvalue = BUF_strdup(value))) goto err;
 	if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
 	if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
 	vtmp->section = NULL;
@@ -360,12 +360,12 @@ static char *strip_spaces(char *name)
  * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
  */
 
-char *hex_to_string(unsigned char *buffer, long len)
+char *hex_to_string(const unsigned char *buffer, long len)
 {
 	char *tmp, *q;
-	unsigned char *p;
+	const unsigned char *p;
 	int i;
-	static char hexdig[] = "0123456789ABCDEF";
+	const static char hexdig[] = "0123456789ABCDEF";
 	if(!buffer || !len) return NULL;
 	if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
 		X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
@@ -389,7 +389,7 @@ char *hex_to_string(unsigned char *buffer, long len)
  * a buffer
  */
 
-unsigned char *string_to_hex(char *str, long *len)
+unsigned char *string_to_hex(const char *str, long *len)
 {
 	unsigned char *hexbuf, *q;
 	unsigned char ch, cl, *p;
@@ -463,21 +463,48 @@ static int sk_strcmp(const char * const *a, const char * const *b)
 	return strcmp(*a, *b);
 }
 
-STACK *X509_get1_email(X509 *x)
+STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
 {
 	GENERAL_NAMES *gens;
-	STACK *ret;
+	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 *X509_REQ_get1_email(X509_REQ *x)
+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 *ret;
+	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);
@@ -487,9 +514,9 @@ STACK *X509_REQ_get1_email(X509_REQ *x)
 }
 
 
-static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
+static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens)
 {
-	STACK *ret = NULL;
+	STACK_OF(OPENSSL_STRING) *ret = NULL;
 	X509_NAME_ENTRY *ne;
 	ASN1_IA5STRING *email;
 	GENERAL_NAME *gen;
@@ -512,23 +539,23 @@ static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
 	return ret;
 }
 
-static void str_free(void *str)
+static void str_free(OPENSSL_STRING str)
 {
 	OPENSSL_free(str);
 }
 
-static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
+static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, 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) *sk = sk_new(sk_strcmp);
+	if(!*sk) *sk = sk_OPENSSL_STRING_new(sk_strcmp);
 	if(!*sk) return 0;
 	/* Don't add duplicates */
-	if(sk_find(*sk, (char *)email->data) != -1) return 1;
+	if(sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) return 1;
 	emtmp = BUF_strdup((char *)email->data);
-	if(!emtmp || !sk_push(*sk, emtmp)) {
+	if(!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
 		X509_email_free(*sk);
 		*sk = NULL;
 		return 0;
@@ -536,11 +563,310 @@ static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
 	return 1;
 }
 
-void X509_email_free(STACK *sk)
+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);
+
+/* 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)
+	{
+	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)
 {
-	sk_pop_free(sk, str_free);
+	/* The pattern must not contain NUL characters. */
+	if (memchr(pattern, '\0', pattern_len) != NULL)
+		return 0;
+	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)
+	{
+	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))
+				return 0;
+			break;
+			}
+		}
+	if (i == 0)
+		i = a_len;
+	return equal_case(a, i, b, i);
+	}
+
+/* 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)
+	{
+	const unsigned char *wildcard_start;
+	const unsigned char *wildcard_end;
+	const unsigned char *p;
+	if (subject_len < prefix_len + suffix_len)
+		return 0;
+	if (!equal_nocase(prefix, prefix_len, subject, prefix_len))
+		return 0;
+	wildcard_start = subject + prefix_len;
+	wildcard_end = subject + (subject_len - suffix_len);
+	if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len))
+		return 0;
+	/* The wildcard must match at least one character. */
+	if (wildcard_start == wildcard_end)
+		return 0;
+	/* Check that the part matched by the wildcard contains only
+	   permitted characters and only matches a single label. */
+	for (p = wildcard_start; p != wildcard_end; ++p)
+		if (!(('0' <= *p && *p <= '9') ||
+		      ('A' <= *p && *p <= 'Z') ||
+		      ('a' <= *p && *p <= 'z') ||
+		      *p == '-'))
+			return 0;
+	return 1;
+	}
+
+/* Checks if the memory region consistens of [0-9A-Za-z.-]. */
+static int valid_domain_characters(const unsigned char *p, size_t len)
+	{
+	while (len)
+		{
+		if (!(('0' <= *p && *p <= '9') ||
+		      ('A' <= *p && *p <= 'Z') ||
+		      ('a' <= *p && *p <= 'z') ||
+		      *p == '-' || *p == '.'))
+			return 0;
+		++p;
+		--len;
+		}
+	return 1;
+	}
+
+/* Find the '*' in a wildcard pattern.  If no such character is found
+   or the pattern is otherwise invalid, returns NULL. */
+static const unsigned char *wildcard_find_star(const unsigned char *pattern,
+					       size_t pattern_len)
+	{
+	const unsigned char *star = memchr(pattern, '*', pattern_len);
+	size_t dot_count = 0;
+	const unsigned char *suffix_start;
+	size_t suffix_length;
+	if (star == NULL)
+		return NULL;
+	suffix_start = star + 1;
+	suffix_length = (pattern + pattern_len) - (star + 1);
+	if (!(valid_domain_characters(pattern, star - pattern) &&
+	      valid_domain_characters(suffix_start, suffix_length)))
+		return NULL;
+	/* Check that the suffix matches at least two labels. */
+	while (suffix_length)
+		{
+		if (*suffix_start == '.')
+			++dot_count;
+		++suffix_start;
+		--suffix_length;
+		}
+	if (dot_count < 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)
+	{
+	const unsigned char *star = wildcard_find_star(pattern, pattern_len);
+	if (star == NULL)
+		return equal_nocase(pattern, pattern_len,
+				    subject, subject_len);
+	return wildcard_match(pattern, star - pattern,
+			      star + 1, (pattern + pattern_len) - star - 1,
+			      subject, subject_len);
+	}
+
+/* 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.
+ */
+
+static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
+				const unsigned char *b, size_t blen)
+	{
+	if (!a->data || !a->length)
+		return 0;
+	if (cmp_type > 0)
+		{
+		if (cmp_type != a->type)
+			return 0;
+		if (cmp_type == V_ASN1_IA5STRING)
+			return equal(a->data, a->length, b, blen);
+		if (a->length == (int)blen && !memcmp(a->data, b, blen))
+			return 1;
+		else
+			return 0;
+		}
+	else
+		{
+		int astrlen, rv;
+		unsigned char *astr;
+		astrlen = ASN1_STRING_to_UTF8(&astr, a);
+		if (astrlen < 0)
+			return -1;
+		rv = equal(astr, astrlen, b, blen);
+		OPENSSL_free(astr);
+		return rv;
+		}
+	}
+
+static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
+					unsigned int flags, int check_type)
+	{
+	GENERAL_NAMES *gens = NULL;
+	X509_NAME *name = NULL;
+	int i;
+	int cnid;
+	int alt_type;
+	equal_fn equal;
+	if (check_type == GEN_EMAIL)
+		{
+		cnid = NID_pkcs9_emailAddress;
+		alt_type = V_ASN1_IA5STRING;
+		equal = equal_email;
+		}
+	else if (check_type == GEN_DNS)
+		{
+		cnid = NID_commonName;
+		alt_type = V_ASN1_IA5STRING;
+		if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
+			equal = equal_nocase;
+		else
+			equal = equal_wildcard;
+		}
+	else
+		{
+		cnid = 0;
+		alt_type = V_ASN1_OCTET_STRING;
+		equal = equal_case;
+		}
+
+	if (chklen == 0)
+		chklen = strlen((const char *)chk);
+
+	gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
+	if (gens)
+		{
+		int rv = 0;
+		for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
+			{
+			GENERAL_NAME *gen;
+			ASN1_STRING *cstr;
+			gen = sk_GENERAL_NAME_value(gens, i);
+			if(gen->type != check_type)
+				continue;
+			if (check_type == GEN_EMAIL)
+				cstr = gen->d.rfc822Name;
+			else if (check_type == GEN_DNS)
+				cstr = gen->d.dNSName;
+			else
+				cstr = gen->d.iPAddress;
+			if (do_check_string(cstr, alt_type, equal, chk, chklen))
+				{
+				rv = 1;
+				break;
+				}
+			}
+		GENERAL_NAMES_free(gens);
+		if (rv)
+			return 1;
+		if (!(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT) || !cnid)
+			return 0;
+		}
+	i = -1;
+	name = X509_get_subject_name(x);
+	while((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0)
+		{
+		X509_NAME_ENTRY *ne;
+		ASN1_STRING *str;
+		ne = X509_NAME_get_entry(name, i);
+		str = X509_NAME_ENTRY_get_data(ne);
+		if (do_check_string(str, -1, equal, chk, chklen))
+			return 1;
+		}
+	return 0;
+	}
+
+int X509_check_host(X509 *x, const unsigned char *chk, size_t chklen,
+					unsigned int flags)
+	{
+	return do_x509_check(x, chk, chklen, flags, GEN_DNS);
+	}
+
+int X509_check_email(X509 *x, const unsigned char *chk, size_t chklen,
+					unsigned int flags)
+	{
+	return do_x509_check(x, chk, chklen, flags, GEN_EMAIL);
+	}
+
+int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
+					unsigned int flags)
+	{
+	return do_x509_check(x, chk, chklen, flags, GEN_IPADD);
+	}
+
+int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
+	{
+	unsigned char ipout[16];
+	int iplen;
+	iplen = a2i_ipadd(ipout, ipasc);
+	if (iplen == 0)
+		return -2;
+	return do_x509_check(x, ipout, (size_t)iplen, flags, GEN_IPADD);
+	}
+
 /* Convert IP addresses both IPv4 and IPv6 into an 
  * OCTET STRING compatible with RFC3280.
  */
@@ -712,17 +1038,20 @@ static int ipv6_from_asc(unsigned char *v6, const char *in)
 
 	/* Format result */
 
-	/* Copy initial part */
-	if (v6stat.zero_pos > 0)
+	if (v6stat.zero_pos >= 0)
+		{
+		/* Copy initial part */
 		memcpy(v6, v6stat.tmp, v6stat.zero_pos);
-	/* Zero middle */
-	if (v6stat.total != 16)
+		/* Zero middle */
 		memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
-	/* Copy final part */
-	if (v6stat.total != v6stat.zero_pos)
-		memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
-			v6stat.tmp + v6stat.zero_pos,
-			v6stat.total - v6stat.zero_pos);
+		/* Copy final part */
+		if (v6stat.total != v6stat.zero_pos)
+			memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
+				v6stat.tmp + v6stat.zero_pos,
+				v6stat.total - v6stat.zero_pos);
+		}
+	else
+		memcpy(v6, v6stat.tmp, 16);
 
 	return 1;
 	}