support of SHA224-based certificate signatures

src/libstrongswan/crypto/hashers/hasher.c

@@ -26,6 +26,7 @@ ENUM(hash_algorithm_names, HASH_UNKNOWN, HASH_SHA512,
 	"HASH_MD4",
 	"HASH_MD5",
 	"HASH_SHA1",
+	"HASH_SHA224",
 	"HASH_SHA256",
 	"HASH_SHA384",
 	"HASH_SHA512"
@@ -47,6 +48,9 @@ hash_algorithm_t hasher_algorithm_from_oid(int oid)
 		case OID_SHA1:
 		case OID_SHA1_WITH_RSA:
 			return HASH_SHA1;
+		case OID_SHA224:
+		case OID_SHA224_WITH_RSA:
+			return HASH_SHA224;
 		case OID_SHA256:
 		case OID_SHA256_WITH_RSA:
 			return HASH_SHA256;
@@ -79,6 +83,9 @@ int hasher_algorithm_to_oid(hash_algorithm_t alg)
 		case HASH_SHA1:
 			oid = OID_SHA1;
 			break;
+		case HASH_SHA224:
+			oid = OID_SHA224;
+			break;
 		case HASH_SHA256:
 			oid = OID_SHA256;
 			break;
@@ -112,6 +119,9 @@ int hasher_signature_algorithm_to_oid(hash_algorithm_t alg)
 		case HASH_SHA1:
 			oid = OID_SHA1_WITH_RSA;
 			break;
+		case HASH_SHA224:
+			oid = OID_SHA224_WITH_RSA;
+			break;
 		case HASH_SHA256:
 			oid = OID_SHA256_WITH_RSA;
 			break;

src/libstrongswan/crypto/hashers/hasher.h

@@ -40,15 +40,17 @@ enum hash_algorithm_t {
 	HASH_MD4			= 3,
 	HASH_MD5 			= 4,
 	HASH_SHA1 			= 5,
-	HASH_SHA256 		= 6,
-	HASH_SHA384 		= 7,
-	HASH_SHA512 		= 8
+	HASH_SHA224			= 6,
+	HASH_SHA256 		= 7,
+	HASH_SHA384 		= 8,
+	HASH_SHA512 		= 9
 };
 
 #define HASH_SIZE_MD2		16
 #define HASH_SIZE_MD4		16
 #define HASH_SIZE_MD5		16
 #define HASH_SIZE_SHA1		20
+#define HASH_SIZE_SHA224	28
 #define HASH_SIZE_SHA256	32
 #define HASH_SIZE_SHA384	48
 #define HASH_SIZE_SHA512	64