added CTR symetric cipher support to qca core

include/QtCrypto/qca_basic.h

@@ -587,7 +587,8 @@ public:
 		CBC, ///< operate in %Cipher Block Chaining mode
 		CFB, ///< operate in %Cipher FeedBack mode
 		ECB, ///< operate in Electronic Code Book mode
-		OFB  ///< operate in Output FeedBack Mode
+		OFB, ///< operate in Output FeedBack Mode
+		CTR, ///< operate in CounTer Mode
 	};
 
 	/**

src/qca_basic.cpp

@@ -393,6 +393,9 @@ QString Cipher::withAlgorithms(const QString &cipherType, Mode modeType, Padding
 	case ECB:
 		mode = "ecb";
 		break;
+	case CTR:
+		mode = "ctr";
+		break;
 	default:
 		Q_ASSERT(0);
 	}