Make function to test if an encryption algorithm is an AEAD alg public

src/libstrongswan/crypto/crypters/crypter.c

@@ -159,4 +159,25 @@ int encryption_algorithm_to_oid(encryption_algorithm_t alg, size_t key_size)
 	return oid;
 }
 
-
+/*
+ * Described in header.
+ */
+bool encryption_algorithm_is_aead(encryption_algorithm_t alg)
+{
+	switch (alg)
+	{
+		case ENCR_AES_CCM_ICV8:
+		case ENCR_AES_CCM_ICV12:
+		case ENCR_AES_CCM_ICV16:
+		case ENCR_AES_GCM_ICV8:
+		case ENCR_AES_GCM_ICV12:
+		case ENCR_AES_GCM_ICV16:
+		case ENCR_NULL_AUTH_AES_GMAC:
+		case ENCR_CAMELLIA_CCM_ICV8:
+		case ENCR_CAMELLIA_CCM_ICV12:
+		case ENCR_CAMELLIA_CCM_ICV16:
+			return TRUE;
+		default:
+			return FALSE;
+	}
+}

src/libstrongswan/crypto/crypters/crypter.h

@@ -170,4 +170,12 @@ encryption_algorithm_t encryption_algorithm_from_oid(int oid, size_t *key_size);
  */
 int encryption_algorithm_to_oid(encryption_algorithm_t alg, size_t key_size);
 
+/**
+ * Check if an encryption algorithm identifier is an AEAD algorithm.
+ *
+ * @param alg			algorithm identifier
+ * @return				TRUE if it is an AEAD algorithm
+ */
+bool encryption_algorithm_is_aead(encryption_algorithm_t alg);
+
 #endif /** CRYPTER_H_ @}*/