public BlowfishCipher2(byte[] key)
{
Debug.Assert(key.Length==32);
_bf = new Blowfish();
_bf.initializeKey(key);
}
public BlowfishCipher2(byte[] key, byte[] iv)
{
_bf = new Blowfish();
_bf.SetIV(iv);
_bf.initializeKey(key);
}
// Test using test vector
// https://www.schneier.com/code/vectors.txt
internal static void Test()
{
// Test ECB
using (var reader = new System.IO.StreamReader(@"vectors.txt")) {
string line;
do
{
line = reader.ReadLine();
} while (line != null && !line.StartsWith("key bytes"));
var blowfish = new Blowfish();
int count = 0;
while (true)
{
line = reader.ReadLine();
if (line == null)
{
break;
}
string[] w = System.Text.RegularExpressions.Regex.Split(line, @"\s\s+");
if (w.Length < 3 || w[0].Length != 16 || w[1].Length != 16 || w[2].Length != 16)
{
break;
}
byte[] key = BigIntegerConverter.ParseHex(w[0]);
byte[] clear = BigIntegerConverter.ParseHex(w[1]);
byte[] cipher = BigIntegerConverter.ParseHex(w[2]);
++count;
System.Diagnostics.Debug.WriteLine("Test ECB #{0}", count);
blowfish.InitializeKey(key);
for (int tries = 1; tries <= 3; ++tries)
{
byte[] encrypted = new byte[cipher.Length];
blowfish.BlockEncrypt(clear, 0, encrypted, 0);
for (int i = 0; i < cipher.Length; ++i)
{
if (encrypted[i] != cipher[i])
{
throw new Exception("encryption failed");
}
}
}
for (int tries = 1; tries <= 3; ++tries)
{
byte[] decrypted = new byte[clear.Length];
blowfish.BlockDecrypt(cipher, 0, decrypted, 0);
for (int i = 0; i < cipher.Length; ++i)
{
if (decrypted[i] != clear[i])
{
throw new Exception("decryption failed");
}
}
}
}
}
// Test CBC
{
byte[] key = BigIntegerConverter.ParseHex("0123456789ABCDEFF0E1D2C3B4A59687");
byte[] iv = BigIntegerConverter.ParseHex("FEDCBA9876543210");
// data: 37363534333231204E6F77206973207468652074696D6520666F722000 (29 bytes) + padding bytes (3 bytes)
byte[] data = BigIntegerConverter.ParseHex("37363534333231204E6F77206973207468652074696D6520666F722000000000");
byte[] cipher = BigIntegerConverter.ParseHex("6B77B4D63006DEE605B156E27403979358DEB9E7154616D959F1652BD5FF92CC");
System.Diagnostics.Debug.WriteLine("Test CBC");
{
Blowfish blowfish = new Blowfish();
blowfish.InitializeKey(key);
blowfish.SetIV(iv);
byte[] encrypted = new byte[cipher.Length];
blowfish.EncryptCBC(data, 0, data.Length, encrypted, 0);
for (int i = 0; i < cipher.Length; ++i)
{
if (encrypted[i] != cipher[i])
{
throw new Exception("encryption failed");
}
}
}
{
Blowfish blowfish = new Blowfish();
blowfish.InitializeKey(key);
blowfish.SetIV(iv);
byte[] decrypted = new byte[data.Length];
for (int i = 0; i < decrypted.Length; ++i)
{
decrypted[i] = 0xff;
}
blowfish.DecryptCBC(cipher, 0, cipher.Length, decrypted, 0);
for (int i = 0; i < data.Length; ++i)
{
if (decrypted[i] != data[i])
{
throw new Exception("decryption failed");
}
}
}
}
}
