Org.BouncyCastle.Crypto.Digests.MD4Digest.DoFinal C# (CSharp) Method

        public override int DoFinal(
            byte[]  output,
            int     outOff)
        {
            Finish();

            UnpackWord(H1, output, outOff);
            UnpackWord(H2, output, outOff + 4);
            UnpackWord(H3, output, outOff + 8);
            UnpackWord(H4, output, outOff + 12);

            Reset();

            return DigestLength;
        }

        public ITestResult Perform()
        {
            IDigest  digest = new MD4Digest();
            byte[]  resBuf = new byte[digest.GetDigestSize()];
            string  resStr;

            //
            // test 1
            //
            digest.DoFinal(resBuf, 0);

            resStr = Hex.ToHexString(resBuf);
            if (!resVec1.Equals(resStr))
            {
                return new SimpleTestResult(false,
                    "MD4 failing standard vector test 1"
                    + SimpleTest.NewLine
                    + "    expected: " + resVec1
                    + SimpleTest.NewLine
                    + "    got     : " + resStr);
            }

            //
            // test 2
            //
            byte[]  bytes = Hex.Decode(testVec2);

            digest.BlockUpdate(bytes, 0, bytes.Length);

            digest.DoFinal(resBuf, 0);

            resStr = Hex.ToHexString(resBuf);
            if (!resVec2.Equals(resStr))
            {
                return new SimpleTestResult(false,
                    "MD4 failing standard vector test 2"
                    + SimpleTest.NewLine
                    + "    expected: " + resVec2
                    + SimpleTest.NewLine
                    + "    got     : " + resStr);
            }

            //
            // test 3
            //
            bytes = Hex.Decode(testVec3);

            digest.BlockUpdate(bytes, 0, bytes.Length);

            digest.DoFinal(resBuf, 0);

            resStr = Hex.ToHexString(resBuf);
            if (!resVec3.Equals(resStr))
            {
                return new SimpleTestResult(false,
                    "MD4 failing standard vector test 3"
                    + SimpleTest.NewLine
                    + "    expected: " + resVec3
                    + SimpleTest.NewLine
                    + "    got     : " + resStr);
            }

            //
            // test 4
            //
            bytes = Hex.Decode(testVec4);

            digest.BlockUpdate(bytes, 0, bytes.Length);

            digest.DoFinal(resBuf, 0);

            resStr = Hex.ToHexString(resBuf);
            if (!resVec4.Equals(resStr))
            {
                return new SimpleTestResult(false,
                    "MD4 failing standard vector test 4"
                    + SimpleTest.NewLine
                    + "    expected: " + resVec4
                    + SimpleTest.NewLine
                    + "    got     : " + resStr);
            }

            //
            // test 5
            //
            bytes = Hex.Decode(testVec4);

            digest.BlockUpdate(bytes, 0, bytes.Length/2);

            // clone the IDigest
            IDigest d = new MD4Digest((MD4Digest)digest);

            digest.BlockUpdate(bytes, bytes.Length/2, bytes.Length - bytes.Length/2);
            digest.DoFinal(resBuf, 0);

            resStr = Hex.ToHexString(resBuf);
            if (!resVec4.Equals(resStr))
            {
                return new SimpleTestResult(false,
                    "MD4 failing standard vector test 5"
                    + SimpleTest.NewLine
                    + "    expected: " + resVec4
                    + SimpleTest.NewLine
                    + "    got     : " + resStr);
            }

            d.BlockUpdate(bytes, bytes.Length/2, bytes.Length - bytes.Length/2);
            d.DoFinal(resBuf, 0);

            resStr = Hex.ToHexString(resBuf);
            if (!resVec4.Equals(resStr))
            {
                return new SimpleTestResult(false,
                    "MD4 failing standard vector test 5"
                    + SimpleTest.NewLine
                    + "    expected: " + resVec4
                    + SimpleTest.NewLine
                    + "    got     : " + resStr);
            }
            return new SimpleTestResult(true, Name + ": Okay");
        }