/**

 * OFBModeTest

 * 

 * A test class for OFBMode

 * Copyright (c) 2007 Henri Torgemane

 * 

 * See LICENSE.txt for full license information.

 */

package com.hurlant.crypto.tests

{

	import flash.utils.ByteArray;

	import com.hurlant.util.Hex;

	import com.hurlant.crypto.symmetric.OFBMode;

	import com.hurlant.crypto.symmetric.AESKey;

	import com.hurlant.crypto.symmetric.NullPad;

	

	public class OFBModeTest extends TestCase

	{

		public function OFBModeTest(h:ITestHarness)

		{

			super(h, "OFBMode Test");

			runTest(testOFB_AES128,"OFB AES-128 Test Vectors");

			runTest(testOFB_AES192,"OFB AES-192 Test Vectors");

			runTest(testOFB_AES256,"OFB AES-256 Test Vectors");

			h.endTestCase();

		}

		

		/**

		 * Nist Vectors: http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf

		 * Section F.4.1 and below.

		 */

		public function testOFB_AES128():void {

			var key:ByteArray = Hex.toArray("2b7e151628aed2a6abf7158809cf4f3c");

			var pt:ByteArray = Hex.toArray(

				"6bc1bee22e409f96e93d7e117393172a" +

				"ae2d8a571e03ac9c9eb76fac45af8e51" + 

				"30c81c46a35ce411e5fbc1191a0a52ef" + 

				"f69f2445df4f9b17ad2b417be66c3710");

			var ct:ByteArray = Hex.toArray(

				"3b3fd92eb72dad20333449f8e83cfb4a" +

				"7789508d16918f03f53c52dac54ed825" + 

				"9740051e9c5fecf64344f7a82260edcc" + 

				"304c6528f659c77866a510d9c1d6ae5e");

			var ofb:OFBMode = new OFBMode(new AESKey(key), new NullPad);

			ofb.IV = Hex.toArray("000102030405060708090a0b0c0d0e0f");

			var src:ByteArray = new ByteArray;

			src.writeBytes(pt);

			ofb.encrypt(src);

			assert("OFB_AES128 test 1", Hex.fromArray(src)==Hex.fromArray(ct));

			ofb.decrypt(src);

			assert("OFB_AES128 test 2", Hex.fromArray(src)==Hex.fromArray(pt));

		}

		

		public function testOFB_AES192():void {

			var key:ByteArray = Hex.toArray("8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b");

			var pt:ByteArray = Hex.toArray(

				"6bc1bee22e409f96e93d7e117393172a" + 

				"ae2d8a571e03ac9c9eb76fac45af8e51" + 

				"30c81c46a35ce411e5fbc1191a0a52ef" + 

				"f69f2445df4f9b17ad2b417be66c3710");

			var ct:ByteArray = Hex.toArray(

				"cdc80d6fddf18cab34c25909c99a4174" + 

				"fcc28b8d4c63837c09e81700c1100401" + 

				"8d9a9aeac0f6596f559c6d4daf59a5f2" + 

				"6d9f200857ca6c3e9cac524bd9acc92a");

			var ofb:OFBMode = new OFBMode(new AESKey(key), new NullPad);

			ofb.IV = Hex.toArray("000102030405060708090a0b0c0d0e0f");

			var src:ByteArray = new ByteArray;

			src.writeBytes(pt);

			ofb.encrypt(src);

			assert("OFB_AES192 test 1", Hex.fromArray(src)==Hex.fromArray(ct));

			ofb.decrypt(src);

			assert("OFB_AES192 test 2", Hex.fromArray(src)==Hex.fromArray(pt));

		}

		

		public function testOFB_AES256():void {

			var key:ByteArray = Hex.toArray(

				"603deb1015ca71be2b73aef0857d7781" + 

				"1f352c073b6108d72d9810a30914dff4");

			var pt:ByteArray = Hex.toArray(

				"6bc1bee22e409f96e93d7e117393172a" + 

				"ae2d8a571e03ac9c9eb76fac45af8e51" + 

				"30c81c46a35ce411e5fbc1191a0a52ef" + 

				"f69f2445df4f9b17ad2b417be66c3710");

			var ct:ByteArray = Hex.toArray(

				"dc7e84bfda79164b7ecd8486985d3860" + 

				"4febdc6740d20b3ac88f6ad82a4fb08d" + 

				"71ab47a086e86eedf39d1c5bba97c408" + 

				"0126141d67f37be8538f5a8be740e484");

			var ofb:OFBMode = new OFBMode(new AESKey(key), new NullPad);

			ofb.IV = Hex.toArray("000102030405060708090a0b0c0d0e0f");

			var src:ByteArray = new ByteArray;

			src.writeBytes(pt);

			ofb.encrypt(src);

			assert("OFB_AES256 test 1", Hex.fromArray(src)==Hex.fromArray(ct));

			ofb.decrypt(src);

			assert("OFB_AES256 test 2", Hex.fromArray(src)==Hex.fromArray(pt));

		}

		

	}

}