Implement request #48520: openssl_csr_new should allow multiple values/fields in dn

Closes GH-12984

Author: bukka

NEWS

@@ -44,6 +44,8 @@ Opcache:
 OpenSSL:
   . Fixed bug #80269 (OpenSSL sets Subject wrong with extraattribs parameter).
     (Jakub Zelenka)
+  . Implement request #48520 (openssl_csr_new - allow multiple values in DN).
+    (Jakub Zelenka)
 
 PDO:
   . Fixed setAttribute and getAttribute (SakiTakamachi)

UPGRADING

@@ -229,6 +229,8 @@ PHP 8.4 UPGRADE NOTES
 - OpenSSL:
   . The extra_attributes parameter in openssl_csr_new sets CSR attributes
     instead of subject DN which was incorrectly done previously.
+  . The dn parameter in openssl_csr_new allows setting array of values for
+    a single entry.
 
 - PDO:
   . getAttribute, enabled to get the value of ATTR_STRINGIFY_FETCHES.

ext/openssl/openssl.c

@@ -2863,8 +2863,29 @@ PHP_FUNCTION(openssl_pkcs12_read)
 
 /* {{{ x509 CSR functions */
 
-/* {{{ php_openssl_make_REQ */
-static int php_openssl_make_REQ(struct php_x509_request * req, X509_REQ * csr, zval * dn, zval * attribs)
+static zend_result php_openssl_csr_add_subj_entry(zval *item, X509_NAME *subj, int nid)
+{
+	zend_string *str_item = zval_try_get_string(item);
+	if (UNEXPECTED(!str_item)) {
+		return FAILURE;
+	}
+	if (!X509_NAME_add_entry_by_NID(subj, nid, MBSTRING_UTF8,
+				(unsigned char*)ZSTR_VAL(str_item), -1, -1, 0))
+	{
+		php_openssl_store_errors();
+		php_error_docref(NULL, E_WARNING,
+			"dn: add_entry_by_NID %d -> %s (failed; check error"
+			" queue and value of string_mask OpenSSL option "
+			"if illegal characters are reported)",
+			nid, ZSTR_VAL(str_item));
+		zend_string_release(str_item);
+		return FAILURE;
+	}
+	zend_string_release(str_item);
+	return SUCCESS;
+}
+
+static zend_result php_openssl_csr_make(struct php_x509_request * req, X509_REQ * csr, zval * dn, zval * attribs)
 {
 	STACK_OF(CONF_VALUE) * dn_sk, *attr_sk = NULL;
 	char * str, *dn_sect, *attr_sect;
@@ -2892,35 +2913,27 @@ static int php_openssl_make_REQ(struct php_x509_request * req, X509_REQ * csr, z
 	/* setup the version number: version 1 */
 	if (X509_REQ_set_version(csr, 0L)) {
 		int i, nid;
-		char * type;
-		CONF_VALUE * v;
-		X509_NAME * subj;
-		zval * item;
-		zend_string * strindex = NULL;
+		char *type;
+		CONF_VALUE *v;
+		X509_NAME *subj;
+		zval *item, *subitem;
+		zend_string *strindex = NULL;
 
 		subj = X509_REQ_get_subject_name(csr);
 		/* apply values from the dn hash */
 		ZEND_HASH_FOREACH_STR_KEY_VAL(Z_ARRVAL_P(dn), strindex, item) {
 			if (strindex) {
 				int nid = OBJ_txt2nid(ZSTR_VAL(strindex));
 				if (nid != NID_undef) {
-					zend_string *str_item = zval_try_get_string(item);
-					if (UNEXPECTED(!str_item)) {
-						return FAILURE;
-					}
-					if (!X509_NAME_add_entry_by_NID(subj, nid, MBSTRING_UTF8,
-								(unsigned char*)ZSTR_VAL(str_item), -1, -1, 0))
-					{
-						php_openssl_store_errors();
-						php_error_docref(NULL, E_WARNING,
-							"dn: add_entry_by_NID %d -> %s (failed; check error"
-							" queue and value of string_mask OpenSSL option "
-							"if illegal characters are reported)",
-							nid, ZSTR_VAL(str_item));
-						zend_string_release(str_item);
+					if (Z_TYPE_P(item) == IS_ARRAY) {
+						ZEND_HASH_FOREACH_NUM_KEY_VAL(Z_ARRVAL_P(item), i, subitem) {
+							if (php_openssl_csr_add_subj_entry(subitem, subj, nid) == FAILURE) {
+								return FAILURE;
+							}
+						} ZEND_HASH_FOREACH_END();
+					} else if (php_openssl_csr_add_subj_entry(item, subj, nid) == FAILURE) {
 						return FAILURE;
 					}
-					zend_string_release(str_item);
 				} else {
 					php_error_docref(NULL, E_WARNING, "dn: %s is not a recognized name", ZSTR_VAL(strindex));
 				}
@@ -3029,8 +3042,6 @@ static int php_openssl_make_REQ(struct php_x509_request * req, X509_REQ * csr, z
 	}
 	return SUCCESS;
 }
-/* }}} */
-
 
 static X509_REQ *php_openssl_csr_from_str(zend_string *csr_str, uint32_t arg_num)
 {
@@ -3370,7 +3381,7 @@ PHP_FUNCTION(openssl_csr_new)
 		} else {
 			csr = X509_REQ_new();
 			if (csr) {
-				if (php_openssl_make_REQ(&req, csr, dn, attribs) == SUCCESS) {
+				if (php_openssl_csr_make(&req, csr, dn, attribs) == SUCCESS) {
 					X509V3_CTX ext_ctx;
 
 					X509V3_set_ctx(&ext_ctx, NULL, NULL, csr, NULL, 0);