public byte[] Digest()
{
var digest = new byte[20];
var tmpContext = new Sha0Context();
Array.Copy(_context.H, tmpContext.H, tmpContext.H.Length);
Array.Copy(_context.Buffer, tmpContext.Buffer, _context.Length % 64);
tmpContext.Buffer[_context.Length % 64] = 0x80;
if (_context.Length % 64 < 56)
{
Array.Clear(tmpContext.Buffer, _context.Length % 64 + 1, 55 - _context.Length % 64);
}
else
{
Array.Clear(tmpContext.Buffer, _context.Length % 64 + 1, 63 - _context.Length % 64);
Transform(tmpContext, tmpContext.Buffer, 0, 1);
Array.Clear(tmpContext.Buffer, 0, 56);
}
UNPACK_64_BE(_context.Length * 8, tmpContext.Buffer, 56);
Transform(tmpContext, tmpContext.Buffer, 0, 1);
UNPACK_32_BE(tmpContext.H[0], digest, 0);
UNPACK_32_BE(tmpContext.H[1], digest, 4);
UNPACK_32_BE(tmpContext.H[2], digest, 8);
UNPACK_32_BE(tmpContext.H[3], digest, 12);
UNPACK_32_BE(tmpContext.H[4], digest, 16);
return(digest);
}
public SHA0()
{
_context = new Sha0Context
{
H =
{
[0] = 0x67452301,
[1] = 0xefcdab89,
[2] = 0x98badcfe,
[3] = 0x10325476,
[4] = 0xc3d2e1f0
},
Length = 0
};
}
private static void Transform(Sha0Context context, byte[] data, long dataStartIndex, long blocks)
{
for (var i = 0; i < blocks; ++i)
{
var wv = new uint[5];
var w = new uint[16];
PACK_32_BE(data, dataStartIndex + (i << 6), out w[0]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 4, out w[1]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 8, out w[2]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 12, out w[3]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 16, out w[4]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 20, out w[5]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 24, out w[6]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 28, out w[7]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 32, out w[8]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 36, out w[9]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 40, out w[10]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 44, out w[11]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 48, out w[12]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 52, out w[13]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 56, out w[14]);
PACK_32_BE(data, dataStartIndex + (i << 6) + 60, out w[15]);
wv[0] = context.H[0];
wv[1] = context.H[1];
wv[2] = context.H[2];
wv[3] = context.H[3];
wv[4] = context.H[4];
SHA0_PRC(wv, 0, 1, 2, 3, 4, w[0], 1);
SHA0_PRC(wv, 4, 0, 1, 2, 3, w[1], 1);
SHA0_PRC(wv, 3, 4, 0, 1, 2, w[2], 1);
SHA0_PRC(wv, 2, 3, 4, 0, 1, w[3], 1);
SHA0_PRC(wv, 1, 2, 3, 4, 0, w[4], 1);
SHA0_PRC(wv, 0, 1, 2, 3, 4, w[5], 1);
SHA0_PRC(wv, 4, 0, 1, 2, 3, w[6], 1);
SHA0_PRC(wv, 3, 4, 0, 1, 2, w[7], 1);
SHA0_PRC(wv, 2, 3, 4, 0, 1, w[8], 1);
SHA0_PRC(wv, 1, 2, 3, 4, 0, w[9], 1);
SHA0_PRC(wv, 0, 1, 2, 3, 4, w[10], 1);
SHA0_PRC(wv, 4, 0, 1, 2, 3, w[11], 1);
SHA0_PRC(wv, 3, 4, 0, 1, 2, w[12], 1);
SHA0_PRC(wv, 2, 3, 4, 0, 1, w[13], 1);
SHA0_PRC(wv, 1, 2, 3, 4, 0, w[14], 1);
SHA0_PRC(wv, 0, 1, 2, 3, 4, w[15], 1);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 0), 1);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 1), 1);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 2), 1);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 3), 1);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 4), 2);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 5), 2);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 6), 2);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 7), 2);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 8), 2);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 9), 2);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 10), 2);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 11), 2);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 12), 2);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 13), 2);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 14), 2);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 15), 2);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 0), 2);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 1), 2);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 2), 2);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 3), 2);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 4), 2);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 5), 2);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 6), 2);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 7), 2);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 8), 3);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 9), 3);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 10), 3);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 11), 3);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 12), 3);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 13), 3);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 14), 3);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 15), 3);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 0), 3);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 1), 3);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 2), 3);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 3), 3);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 4), 3);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 5), 3);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 6), 3);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 7), 3);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 8), 3);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 9), 3);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 10), 3);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 11), 3);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 12), 4);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 13), 4);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 14), 4);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 15), 4);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 0), 4);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 1), 4);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 2), 4);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 3), 4);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 4), 4);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 5), 4);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 6), 4);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 7), 4);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 8), 4);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 9), 4);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 10), 4);
SHA0_PRC(wv, 0, 1, 2, 3, 4, SHA0_EXT(w, 11), 4);
SHA0_PRC(wv, 4, 0, 1, 2, 3, SHA0_EXT(w, 12), 4);
SHA0_PRC(wv, 3, 4, 0, 1, 2, SHA0_EXT(w, 13), 4);
SHA0_PRC(wv, 2, 3, 4, 0, 1, SHA0_EXT(w, 14), 4);
SHA0_PRC(wv, 1, 2, 3, 4, 0, SHA0_EXT(w, 15), 4);
context.H[0] += wv[0];
context.H[1] += wv[1];
context.H[2] += wv[2];
context.H[3] += wv[3];
context.H[4] += wv[4];
}
}
