use openssl rsa_verify function

src/libstrongswan/credentials/keys/public_key.c

@@ -26,6 +26,7 @@ ENUM(key_type_names, KEY_ANY, KEY_DSA,
 
 ENUM(signature_scheme_names, SIGN_UNKNOWN, SIGN_ECDSA_521,
 	"UNKNOWN",
+	"RSA_SHA1"
 	"RSA_EMSA_PKCS1_NULL",
 	"RSA_EMSA_PKCS1_MD5",
 	"RSA_EMSA_PKCS1_SHA1",

src/libstrongswan/credentials/keys/public_key.h

@@ -60,6 +60,8 @@ extern enum_name_t *key_type_names;
 enum signature_scheme_t {
 	/** Unknown signature scheme                                       */
 	SIGN_UNKNOWN,
+	/** Generic PKCS1_v1.5 signature as in PKCS#1 using RSA and SHA-1  */
+	SIGN_RSA_SHA1,
 	/** EMSA-PKCS1_v1.5 signature over digest without digestInfo       */
 	SIGN_RSA_EMSA_PKCS1_NULL,
 	/** EMSA-PKCS1_v1.5 signature as in PKCS#1 using RSA and MD5       */