1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// BLAKE2 reference source code package - C# implementation
// Written in 2012 by Christian Winnerlein <codesinchaos@gmail.com>
// To the extent possible under law, the author(s) have dedicated all copyright
// and related and neighboring rights to this software to the public domain
// worldwide. This software is distributed without any warranty.
// You should have received a copy of the CC0 Public Domain Dedication along with
// this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
//
/*
Based on BlakeSharp
by Dominik Reichl <dominik.reichl@t-online.de>
Web: http://www.dominik-reichl.de/
If you're using this class, it would be nice if you'd mention
me somewhere in the documentation of your program, but it's
not required.
BLAKE was designed by Jean-Philippe Aumasson, Luca Henzen,
Willi Meier and Raphael C.-W. Phan.
BlakeSharp was derived from the reference C implementation.
*/
using System;
namespace Blake2Sharp
{
public sealed partial class Blake2BCore
{
private bool _isInitialized = false;
private int _bufferFilled;
private byte[] _buf = new byte[128];
private ulong[] _m = new ulong[16];
private ulong[] _h = new ulong[8];
private ulong _counter0;
private ulong _counter1;
private ulong _finalizationFlag0;
private ulong _finalizationFlag1;
private const int NumberOfRounds = 12;
private const int BlockSizeInBytes = 128;
const ulong IV0 = 0x6A09E667F3BCC908UL;
const ulong IV1 = 0xBB67AE8584CAA73BUL;
const ulong IV2 = 0x3C6EF372FE94F82BUL;
const ulong IV3 = 0xA54FF53A5F1D36F1UL;
const ulong IV4 = 0x510E527FADE682D1UL;
const ulong IV5 = 0x9B05688C2B3E6C1FUL;
const ulong IV6 = 0x1F83D9ABFB41BD6BUL;
const ulong IV7 = 0x5BE0CD19137E2179UL;
private static readonly int[] Sigma = new int[NumberOfRounds * 16] {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3,
11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4,
7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8,
9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13,
2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9,
12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11,
13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10,
6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5,
10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3
};
internal static ulong BytesToUInt64(byte[] buf, int offset)
{
return
((ulong)buf[offset + 7] << 7 * 8 |
((ulong)buf[offset + 6] << 6 * 8) |
((ulong)buf[offset + 5] << 5 * 8) |
((ulong)buf[offset + 4] << 4 * 8) |
((ulong)buf[offset + 3] << 3 * 8) |
((ulong)buf[offset + 2] << 2 * 8) |
((ulong)buf[offset + 1] << 1 * 8) |
((ulong)buf[offset]));
}
private static void UInt64ToBytes(ulong value, byte[] buf, int offset)
{
buf[offset + 7] = (byte)(value >> 7 * 8);
buf[offset + 6] = (byte)(value >> 6 * 8);
buf[offset + 5] = (byte)(value >> 5 * 8);
buf[offset + 4] = (byte)(value >> 4 * 8);
buf[offset + 3] = (byte)(value >> 3 * 8);
buf[offset + 2] = (byte)(value >> 2 * 8);
buf[offset + 1] = (byte)(value >> 1 * 8);
buf[offset] = (byte)value;
}
partial void Compress(byte[] block, int start);
public void Initialize(ulong[] config)
{
if (config == null)
throw new ArgumentNullException("config");
if (config.Length != 8)
throw new ArgumentException("config length must be 8 words");
_isInitialized = true;
_h[0] = IV0;
_h[1] = IV1;
_h[2] = IV2;
_h[3] = IV3;
_h[4] = IV4;
_h[5] = IV5;
_h[6] = IV6;
_h[7] = IV7;
_counter0 = 0;
_counter1 = 0;
_finalizationFlag0 = 0;
_finalizationFlag1 = 0;
_bufferFilled = 0;
Array.Clear(_buf, 0, _buf.Length);
for (int i = 0; i < 8; i++)
_h[i] ^= config[i];
}
public void HashCore(byte[] array, int start, int count)
{
if (!_isInitialized)
throw new InvalidOperationException("Not initialized");
if (array == null)
throw new ArgumentNullException("array");
if (start < 0)
throw new ArgumentOutOfRangeException("start");
if (count < 0)
throw new ArgumentOutOfRangeException("count");
if ((long)start + (long)count > array.Length)
throw new ArgumentOutOfRangeException("start+count");
int offset = start;
int bufferRemaining = BlockSizeInBytes - _bufferFilled;
if ((_bufferFilled > 0) && (count > bufferRemaining))
{
Array.Copy(array, offset, _buf, _bufferFilled, bufferRemaining);
_counter0 += BlockSizeInBytes;
if (_counter0 == 0)
_counter1++;
Compress(_buf, 0);
offset += bufferRemaining;
count -= bufferRemaining;
_bufferFilled = 0;
}
while (count > BlockSizeInBytes)
{
_counter0 += BlockSizeInBytes;
if (_counter0 == 0)
_counter1++;
Compress(array, offset);
offset += BlockSizeInBytes;
count -= BlockSizeInBytes;
}
if (count > 0)
{
Array.Copy(array, offset, _buf, _bufferFilled, count);
_bufferFilled += count;
}
}
public byte[] HashFinal()
{
return HashFinal(false);
}
public byte[] HashFinal(bool isEndOfLayer)
{
if (!_isInitialized)
throw new InvalidOperationException("Not initialized");
_isInitialized = false;
//Last compression
_counter0 += (uint)_bufferFilled;
_finalizationFlag0 = ulong.MaxValue;
if (isEndOfLayer)
_finalizationFlag1 = ulong.MaxValue;
for (int i = _bufferFilled; i < _buf.Length; i++)
_buf[i] = 0;
Compress(_buf, 0);
//Output
byte[] hash = new byte[64];
for (int i = 0; i < 8; ++i)
UInt64ToBytes(_h[i], hash, i << 3);
return hash;
}
}
}
|
