SabreTools/SabreTools.Hashing
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Consolidate the hash pieces into an array

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This commit is contained in:
Matt Nadareski
2024-11-09 00:32:25 -05:00
parent 70e79a68eb
commit bd0f76ef08
1 changed files with 23 additions and 43 deletions
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66
SabreTools.Hashing/RipeMD/RipeMD160.cs
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@@ -6,29 +6,9 @@ namespace SabreTools.Hashing.RipeMD
internal class RipeMD160
{
/// <summary>
/// Leftmost 32 bits
/// Set of 5 32-bit numbers representing the hash state
/// </summary>
private uint _y0;
/// <summary>
/// Second from left 32 bits
/// </summary>
private uint _y1;
/// <summary>
/// Third from left 32 bits
/// </summary>
private uint _y2;
/// <summary>
/// Fourth from left 32 bits
/// </summary>
private uint _y3;
/// <summary>
/// Fifth from left 32 bits
/// </summary>
private uint _y4;
private readonly uint[] _state = new uint[5];
/// <summary>
/// Total number of bytes processed
@@ -56,11 +36,11 @@ namespace SabreTools.Hashing.RipeMD
public void Reset()
{
// Reset the seed values
_y0 = RMD160Y0;
_y1 = RMD160Y1;
_y2 = RMD160Y2;
_y3 = RMD160Y3;
_y4 = RMD160Y4;
_state[0] = RMD160Y0;
_state[1] = RMD160Y1;
_state[2] = RMD160Y2;
_state[3] = RMD160Y3;
_state[4] = RMD160Y4;
// Reset the byte count
_totalBytes = 0;
@@ -172,31 +152,31 @@ namespace SabreTools.Hashing.RipeMD
int hashOffset = 0;
// Y0
byte[] segment = BitConverter.GetBytes(_y0);
byte[] segment = BitConverter.GetBytes(_state[0]);
Array.Reverse(segment);
Array.Copy(segment, 0, hash, hashOffset, 4);
hashOffset += 4;
// Y1
segment = BitConverter.GetBytes(_y1);
segment = BitConverter.GetBytes(_state[1]);
Array.Reverse(segment);
Array.Copy(segment, 0, hash, hashOffset, 4);
hashOffset += 4;
// Y2
segment = BitConverter.GetBytes(_y2);
segment = BitConverter.GetBytes(_state[2]);
Array.Reverse(segment);
Array.Copy(segment, 0, hash, hashOffset, 4);
hashOffset += 4;
// Y3
segment = BitConverter.GetBytes(_y3);
segment = BitConverter.GetBytes(_state[3]);
Array.Reverse(segment);
Array.Copy(segment, 0, hash, hashOffset, 4);
hashOffset += 4;
// Y4
segment = BitConverter.GetBytes(_y4);
segment = BitConverter.GetBytes(_state[4]);
Array.Reverse(segment);
Array.Copy(segment, 0, hash, hashOffset, 4);
@@ -219,11 +199,11 @@ namespace SabreTools.Hashing.RipeMD
private void Round()
{
// Setup values
uint x0 = _y0, xp0 = _y0;
uint x1 = _y1, xp1 = _y1;
uint x2 = _y2, xp2 = _y2;
uint x3 = _y3, xp3 = _y3;
uint x4 = _y4, xp4 = _y4;
uint x0 = _state[0], xp0 = _state[0];
uint x1 = _state[1], xp1 = _state[1];
uint x2 = _state[2], xp2 = _state[2];
uint x3 = _state[3], xp3 = _state[3];
uint x4 = _state[4], xp4 = _state[4];
#region Rounds 0-15
@@ -726,12 +706,12 @@ namespace SabreTools.Hashing.RipeMD
#endregion
// Avalanche values
xp3 += x2 + _y1;
_y1 = _y2 + x3 + xp4;
_y2 = _y3 + x4 + xp0;
_y3 = _y4 + x0 + xp1;
_y4 = _y0 + x1 + xp2;
_y0 = xp3;
xp3 += x2 + _state[1];
_state[1] = _state[2] + x3 + xp4;
_state[2] = _state[3] + x4 + xp0;
_state[3] = _state[4] + x0 + xp1;
_state[4] = _state[0] + x1 + xp2;
_state[0] = xp3;
}
/// <summary>