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using System;
using System.IO;
using System.Text;
using NUnit.Framework;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.IO;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.Encoders;
using Org.BouncyCastle.Utilities.Test;
namespace Org.BouncyCastle.Tests
{
/// <remarks>
/// Basic test class for key generation for a DES-EDE block cipher, basically
/// this just exercises the provider, and makes sure we are behaving sensibly,
/// correctness of the implementation is shown in the lightweight test classes.
/// </remarks>
[TestFixture]
public class DesEdeTest
: SimpleTest
{
private static string[] cipherTests1 =
{
"112",
"2f4bc6b30c893fa549d82c560d61cf3eb088aed020603de249d82c560d61cf3e529e95ecd8e05394",
"128",
"2f4bc6b30c893fa549d82c560d61cf3eb088aed020603de249d82c560d61cf3e529e95ecd8e05394",
"168",
"50ddb583a25c21e6c9233f8e57a86d40bb034af421c03096c9233f8e57a86d402fce91e8eb639f89",
"192",
"50ddb583a25c21e6c9233f8e57a86d40bb034af421c03096c9233f8e57a86d402fce91e8eb639f89",
};
private static byte[] input1 = Hex.Decode("000102030405060708090a0b0c0d0e0fff0102030405060708090a0b0c0d0e0f");
/**
* a fake random number generator - we just want to make sure the random numbers
* aren't random so that we get the same output, while still getting to test the
* key generation facilities.
*/
private class FixedSecureRandom
: SecureRandom
{
private byte[] seed =
{
(byte)0xaa, (byte)0xfd, (byte)0x12, (byte)0xf6, (byte)0x59,
(byte)0xca, (byte)0xe6, (byte)0x34, (byte)0x89, (byte)0xb4,
(byte)0x79, (byte)0xe5, (byte)0x07, (byte)0x6d, (byte)0xde,
(byte)0xc2, (byte)0xf0, (byte)0x6c, (byte)0xb5, (byte)0x8f
};
public override void NextBytes(byte[] buf)
{
NextBytes(buf, 0, buf.Length);
}
public override void NextBytes(byte[] buf, int off, int len)
{
int pos = 0;
while ((pos + seed.Length) < len)
{
Array.Copy(seed, 0, buf, off + pos, seed.Length);
pos += seed.Length;
}
Array.Copy(seed, 0, buf, off + pos, len - pos);
}
}
public override string Name
{
get { return "DESEDE"; }
}
private void wrapTest(
string alg,
int id,
byte[] kek,
byte[] iv,
byte[] input,
byte[] output)
{
try
{
IWrapper wrapper = WrapperUtilities.GetWrapper(alg + "Wrap");
KeyParameter desEdeKey = new DesEdeParameters(kek);
wrapper.Init(true, new ParametersWithIV(desEdeKey, iv));
try
{
// byte[] cText = wrapper.Wrap(new SecretKeySpec(input, alg));
byte[] cText = wrapper.Wrap(input, 0, input.Length);
if (!Arrays.AreEqual(cText, output))
{
Fail("failed wrap test " + id + " expected "
+ Hex.ToHexString(output) + " got " + Hex.ToHexString(cText));
}
}
catch (Exception e)
{
Fail("failed wrap test exception " + e.ToString());
}
wrapper.Init(false, desEdeKey);
try
{
// Key pText = wrapper.unwrap(output, alg, IBufferedCipher.SECRET_KEY);
byte[] pText = wrapper.Unwrap(output, 0, output.Length);
// if (!Arrays.AreEqual(pText.getEncoded(), input))
if (!Arrays.AreEqual(pText, input))
{
Fail("failed unwrap test " + id + " expected "
+ Hex.ToHexString(input) + " got "
+ Hex.ToHexString(pText));
}
}
catch (Exception e)
{
Fail("failed unwrap test exception " + e.ToString());
}
}
catch (Exception ex)
{
Fail("failed exception " + ex.ToString());
}
}
private void doTest(
string alg,
int strength,
byte[] input,
byte[] output)
{
KeyParameter key = null;
CipherKeyGenerator keyGen;
SecureRandom rand;
IBufferedCipher inCipher = null;
IBufferedCipher outCipher = null;
CipherStream cIn;
CipherStream cOut;
MemoryStream bIn;
MemoryStream bOut;
rand = new FixedSecureRandom();
try
{
keyGen = GeneratorUtilities.GetKeyGenerator(alg);
keyGen.Init(new KeyGenerationParameters(rand, strength));
key = new DesEdeParameters(keyGen.GenerateKey());
inCipher = CipherUtilities.GetCipher(alg + "/ECB/PKCS7Padding");
outCipher = CipherUtilities.GetCipher(alg + "/ECB/PKCS7Padding");
outCipher.Init(true, new ParametersWithRandom(key, rand));
}
catch (Exception e)
{
Fail(alg + " failed initialisation - " + e.ToString());
}
try
{
inCipher.Init(false, key);
}
catch (Exception e)
{
Fail(alg + " failed initialisation - " + e.ToString());
}
//
// encryption pass
//
bOut = new MemoryStream();
cOut = new CipherStream(bOut, null, outCipher);
try
{
for (int i = 0; i != input.Length / 2; i++)
{
cOut.WriteByte(input[i]);
}
cOut.Write(input, input.Length / 2, input.Length - input.Length / 2);
cOut.Close();
}
catch (IOException e)
{
Fail(alg + " failed encryption - " + e.ToString());
}
byte[] bytes = bOut.ToArray();
if (!Arrays.AreEqual(bytes, output))
{
Fail(alg + " failed encryption - expected "
+ Hex.ToHexString(output) + " got "
+ Hex.ToHexString(bytes));
}
//
// decryption pass
//
bIn = new MemoryStream(bytes, false);
cIn = new CipherStream(bIn, inCipher, null);
try
{
// DataInputStream dIn = new DataInputStream(cIn);
BinaryReader dIn = new BinaryReader(cIn);
bytes = new byte[input.Length];
for (int i = 0; i != input.Length / 2; i++)
{
bytes[i] = (byte)dIn.ReadByte();
}
// dIn.readFully(bytes, input.Length / 2, bytes.Length - input.Length / 2);
int remaining = bytes.Length - input.Length / 2;
byte[] rest = dIn.ReadBytes(remaining);
if (rest.Length != remaining)
throw new Exception("IO problem with BinaryReader");
rest.CopyTo(bytes, input.Length / 2);
}
catch (Exception e)
{
Fail(alg + " failed encryption - " + e.ToString());
}
if (!Arrays.AreEqual(bytes, input))
{
Fail(alg + " failed decryption - expected "
+ Hex.ToHexString(input) + " got "
+ Hex.ToHexString(bytes));
}
// TODO Put back in
// //
// // keyspec test
// //
// try
// {
// SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(alg);
// DESedeKeySpec keySpec = (DESedeKeySpec)keyFactory.getKeySpec((SecretKey)key, DESedeKeySpec.class);
//
// if (!equalArray(key.getEncoded(), keySpec.getKey(), 16))
// {
// Fail(alg + " KeySpec does not match key.");
// }
// }
// catch (Exception e)
// {
// Fail(alg + " failed keyspec - " + e.ToString());
// }
}
public override void PerformTest()
{
for (int i = 0; i != cipherTests1.Length; i += 2)
{
doTest("DESEDE", int.Parse(cipherTests1[i]), input1, Hex.Decode(cipherTests1[i + 1]));
}
for (int i = 0; i != cipherTests1.Length; i += 2)
{
doTest("TDEA", int.Parse(cipherTests1[i]), input1, Hex.Decode(cipherTests1[i + 1]));
}
byte[] kek1 = Hex.Decode("255e0d1c07b646dfb3134cc843ba8aa71f025b7c0838251f");
byte[] iv1 = Hex.Decode("5dd4cbfc96f5453b");
byte[] in1 = Hex.Decode("2923bf85e06dd6ae529149f1f1bae9eab3a7da3d860d3e98");
byte[] out1 = Hex.Decode("690107618ef092b3b48ca1796b234ae9fa33ebb4159604037db5d6a84eb3aac2768c632775a467d4");
wrapTest("DESEDE", 1, kek1, iv1, in1, out1);
wrapTest("TDEA", 1, kek1, iv1, in1, out1);
}
[Test]
public void TestFunction()
{
string resultText = Perform().ToString();
Assert.AreEqual(Name + ": Okay", resultText);
}
}
}
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