Witam od tygodnia walczę z implementacją tej funkcji skrótu jest ona elementem mojej pracy inżynierkiej(nie mogę używać wbudowanych). Czy mógłby ktoś podpowiedzieć co trzeba poprawić ,lub dopisać to co brakuję, dzięki z góry:
void SHA1()
{
List<byte> Data = new List<byte>();
Data.Add(97);
Data.Add(97);
Data.Add(97);
Data.Add(97);
Data.Add(97);
uint h0 = 0x67452301;
uint h1 = 0xEFCDAB89;
uint h2 = 0x98BADCFE;
uint h3 = 0x10325476;
uint h4 = 0xC3D2E1F0;
Data.Add(0x80);
while (((Data.Count + 8) & 64) == 0)
{
Data.Add(0x00);
}
UInt64 Lall = (UInt64)Data.Count * 8;
UInt64[] La = new UInt64[64];
La[0] = Lall / (72057594037927936);
Lall = Lall - La[0];
La[1] = Lall / (281474976710656);
Lall = Lall - La[1];
La[2] = Lall / (1099511627776);
Lall = Lall - La[2];
La[3] = Lall / (4294967296);
Lall = Lall - La[3];
La[4] = Lall / (16777216);
Lall = Lall - La[4];
La[5] = Lall / (65536);
Lall = Lall - La[5];
La[6] = Lall / (256);
Lall = Lall - La[6];
La[7] = Lall;
Lall = Lall - La[7];
Data.Add((byte)(((int)La[0])));
Data.Add((byte)(((int)La[1])));
Data.Add((byte)(((int)La[2])));
Data.Add((byte)(((int)La[3])));
Data.Add((byte)(((int)La[4])));
Data.Add((byte)(((int)La[5])));
Data.Add((byte)(((int)La[6])));
Data.Add((byte)(((int)La[7])));
byte[] DataBlock = new byte[64];
uint[] DataWord = new uint[80];
for (int i = 0; i < 16; i++)
{
DataWord[i] = 0;
DataWord[i] = DataWord[i] + ((uint)Data[i * 4 + 3]) << 24;
DataWord[i] = DataWord[i] + ((uint)Data[i * 4 + 2]) << 16;
DataWord[i] = DataWord[i] + ((uint)Data[i * 4 + 1]) << 8;
DataWord[i] = DataWord[i] + (uint)Data[i * 4];
}
for (int i = 16; i < 80; i++)
{
DataWord[i] = LeftRotate( (DataWord[i - 3] ^ DataWord[i - 8] ^ DataWord[i - 14] ^ DataWord[i - 16]), 1);
}
uint a = h0;
uint b = h1;
uint c = h2;
uint d = h3;
uint e = h4;
uint f = 0;
uint k = 0;
uint temp = 0;
for (int i = 0; i < 80; i++)
{
if ((0 <= i) & (i <= 19))
{
f = (b & c) | ((~b) & d);
k = 0x5A827999;
}
if ((20 <= i) & (i <= 39))
{
f = (b ^ c ^ d);
k = 0x6ED9EBA1;
}
if ((40 <= i) & (i <= 59))
{
f = (b & c) | (b & d) | (c & d);
k = 0x8F1BBCDC;
}
if ((60 <= i) & (i <= 79))
{
f = b ^ c ^ d;
k = 0xCA62C1D6;
}
temp = LeftRotate(a, 5) + f + e + k + DataWord[i];
e = d;
d = c;
c = LeftRotate(b, 30);
b = a;
a = temp;
}
h0 = h0 + a;
h1 = h1 + b;
h2 = h2 + c;
h3 = h3 + d;
h4 = h4 + e;
}