public byte[] Encrypt(byte[] data)
{
if (data.Length % 8 != 0)
{
throw new ArgumentOutOfRangeException("Input data needs to be of a length that is a multiple of 8.");
}
byte[] result = new byte[data.Length];
byte[] tempBytes;
uint[] temp = new uint[2];
uint[] tempResult;
for (int i = 0; i < data.Length; i += 8)
{
for (int j = i; j < (i + 8); j += 4)
{
uint tempword = 0;
tempword += data[j];
tempword = tempword << 8;
tempword += data[j + 1];
tempword = tempword << 8;
tempword += data[j + 2];
tempword = tempword << 8;
tempword += data[j + 3];
temp[(j % 8) / 4] = tempword;
}
tempResult = Code(temp);
tempBytes = CryptoHelpers.uintArrayToByteArray(tempResult);
Array.Copy(tempBytes, 0, result, i, 8);
}
return(result);
}
public uint[] ComputeHash(byte[] data)
{
byte[] paddedData = PadInput(data);
const int blockSize = 64;
uint[] w;
uint[] words;
uint A, B, C, D, E, F;
uint K0, K1, K2, K3;
uint[] H = new uint[5];
uint temp;
H[0] = Hash[0];
H[1] = Hash[1];
H[2] = Hash[2];
H[3] = Hash[3];
H[4] = Hash[4];
K0 = 0x5A827999;
K1 = 0x6ED9EBA1;
K2 = 0x8F1BBCDC;
K3 = 0xCA62C1D6;
for (int i = 0; i < paddedData.Length; i += blockSize)
{//Process each block
w = new uint[80];
words = new uint[16];
//Split into 16 words
for (int j = i; j < (i + blockSize); j += 4)
{
uint tempword = 0;
tempword += paddedData[j];
tempword = tempword << 8;
tempword += paddedData[j + 1];
tempword = tempword << 8;
tempword += paddedData[j + 2];
tempword = tempword << 8;
tempword += paddedData[j + 3];
words[(j % blockSize) / 4] = tempword;
}
for (int j = 0; j < 16; j++)
{
w[j] = words[j];
}
for (int j = 16; j < 80; j++)
{
w[j] = CryptoHelpers.Rotate(1, (w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16]));
}
A = H[0];
B = H[1];
C = H[2];
D = H[3];
E = H[4];
for (int j = 0; j < 20; j++)
{
F = (B & C) | ((~B) & D);
temp = CryptoHelpers.Rotate(5, A) + F + E + K0 + w[j];
E = D;
D = C;
C = CryptoHelpers.Rotate(30, B);
B = A;
A = temp;
}
for (int j = 20; j < 40; j++)
{
F = (B ^ C ^ D);
temp = CryptoHelpers.Rotate(5, A) + F + E + K1 + w[j];
E = D;
D = C;
C = CryptoHelpers.Rotate(30, B);
B = A;
A = temp;
}
for (int j = 40; j < 60; j++)
{
F = (B & C) | (B & D) | (C & D);
temp = CryptoHelpers.Rotate(5, A) + F + E + K2 + w[j];
E = D;
D = C;
C = CryptoHelpers.Rotate(30, B);
B = A;
A = temp;
}
for (int j = 60; j < 80; j++)
{
F = (B ^ C ^ D);
temp = CryptoHelpers.Rotate(5, A) + F + E + K3 + w[j];
E = D;
D = C;
C = CryptoHelpers.Rotate(30, B);
B = A;
A = temp;
}
H[0] += A;
H[1] += B;
H[2] += C;
H[3] += D;
H[4] += E;
}
HashedUint = H;
return(H);
}