Botan: src/hash/whirlpool/whrlpool.cpp Source File

Botan 1.10.17

whrlpool.cpp
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1 /*
2 * Whirlpool
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7
8 #include <botan/whrlpool.h>
9 #include <botan/loadstor.h>
10
11 namespace Botan {
12
13 /*
14 * Whirlpool Compression Function
15 */
16 void Whirlpool::compress_n(const byte in[], size_t blocks)
17 {
18 static const u64bit RC[10] = {
19 0x1823C6E887B8014F, 0x36A6D2F5796F9152,
20 0x60BC9B8EA30C7B35, 0x1DE0D7C22E4BFE57,
21 0x157737E59FF04ADA, 0x58C9290AB1A06B85,
22 0xBD5D10F4CB3E0567, 0xE427418BA77D95D8,
23 0xFBEE7C66DD17479E, 0xCA2DBF07AD5A8333
24 };
25
26 for(size_t i = 0; i != blocks; ++i)
27 {
28 load_be(&M[0], in, M.size());
29
30 u64bit K0, K1, K2, K3, K4, K5, K6, K7;
31 K0 = digest[0]; K1 = digest[1]; K2 = digest[2]; K3 = digest[3];
32 K4 = digest[4]; K5 = digest[5]; K6 = digest[6]; K7 = digest[7];
33
34 u64bit B0, B1, B2, B3, B4, B5, B6, B7;
35 B0 = K0 ^ M[0]; B1 = K1 ^ M[1]; B2 = K2 ^ M[2]; B3 = K3 ^ M[3];
36 B4 = K4 ^ M[4]; B5 = K5 ^ M[5]; B6 = K6 ^ M[6]; B7 = K7 ^ M[7];
37
38 for(size_t j = 0; j != 10; ++j)
39 {
40 u64bit T0, T1, T2, T3, T4, T5, T6, T7;
41 T0 = C0[get_byte(0, K0)] ^ C1[get_byte(1, K7)] ^
42 C2[get_byte(2, K6)] ^ C3[get_byte(3, K5)] ^
43 C4[get_byte(4, K4)] ^ C5[get_byte(5, K3)] ^
44 C6[get_byte(6, K2)] ^ C7[get_byte(7, K1)] ^ RC[j];
45 T1 = C0[get_byte(0, K1)] ^ C1[get_byte(1, K0)] ^
46 C2[get_byte(2, K7)] ^ C3[get_byte(3, K6)] ^
47 C4[get_byte(4, K5)] ^ C5[get_byte(5, K4)] ^
48 C6[get_byte(6, K3)] ^ C7[get_byte(7, K2)];
49 T2 = C0[get_byte(0, K2)] ^ C1[get_byte(1, K1)] ^
50 C2[get_byte(2, K0)] ^ C3[get_byte(3, K7)] ^
51 C4[get_byte(4, K6)] ^ C5[get_byte(5, K5)] ^
52 C6[get_byte(6, K4)] ^ C7[get_byte(7, K3)];
53 T3 = C0[get_byte(0, K3)] ^ C1[get_byte(1, K2)] ^
54 C2[get_byte(2, K1)] ^ C3[get_byte(3, K0)] ^
55 C4[get_byte(4, K7)] ^ C5[get_byte(5, K6)] ^
56 C6[get_byte(6, K5)] ^ C7[get_byte(7, K4)];
57 T4 = C0[get_byte(0, K4)] ^ C1[get_byte(1, K3)] ^
58 C2[get_byte(2, K2)] ^ C3[get_byte(3, K1)] ^
59 C4[get_byte(4, K0)] ^ C5[get_byte(5, K7)] ^
60 C6[get_byte(6, K6)] ^ C7[get_byte(7, K5)];
61 T5 = C0[get_byte(0, K5)] ^ C1[get_byte(1, K4)] ^
62 C2[get_byte(2, K3)] ^ C3[get_byte(3, K2)] ^
63 C4[get_byte(4, K1)] ^ C5[get_byte(5, K0)] ^
64 C6[get_byte(6, K7)] ^ C7[get_byte(7, K6)];
65 T6 = C0[get_byte(0, K6)] ^ C1[get_byte(1, K5)] ^
66 C2[get_byte(2, K4)] ^ C3[get_byte(3, K3)] ^
67 C4[get_byte(4, K2)] ^ C5[get_byte(5, K1)] ^
68 C6[get_byte(6, K0)] ^ C7[get_byte(7, K7)];
69 T7 = C0[get_byte(0, K7)] ^ C1[get_byte(1, K6)] ^
70 C2[get_byte(2, K5)] ^ C3[get_byte(3, K4)] ^
71 C4[get_byte(4, K3)] ^ C5[get_byte(5, K2)] ^
72 C6[get_byte(6, K1)] ^ C7[get_byte(7, K0)];
73
74 K0 = T0; K1 = T1; K2 = T2; K3 = T3;
75 K4 = T4; K5 = T5; K6 = T6; K7 = T7;
76
77 T0 = C0[get_byte(0, B0)] ^ C1[get_byte(1, B7)] ^
78 C2[get_byte(2, B6)] ^ C3[get_byte(3, B5)] ^
79 C4[get_byte(4, B4)] ^ C5[get_byte(5, B3)] ^
80 C6[get_byte(6, B2)] ^ C7[get_byte(7, B1)] ^ K0;
81 T1 = C0[get_byte(0, B1)] ^ C1[get_byte(1, B0)] ^
82 C2[get_byte(2, B7)] ^ C3[get_byte(3, B6)] ^
83 C4[get_byte(4, B5)] ^ C5[get_byte(5, B4)] ^
84 C6[get_byte(6, B3)] ^ C7[get_byte(7, B2)] ^ K1;
85 T2 = C0[get_byte(0, B2)] ^ C1[get_byte(1, B1)] ^
86 C2[get_byte(2, B0)] ^ C3[get_byte(3, B7)] ^
87 C4[get_byte(4, B6)] ^ C5[get_byte(5, B5)] ^
88 C6[get_byte(6, B4)] ^ C7[get_byte(7, B3)] ^ K2;
89 T3 = C0[get_byte(0, B3)] ^ C1[get_byte(1, B2)] ^
90 C2[get_byte(2, B1)] ^ C3[get_byte(3, B0)] ^
91 C4[get_byte(4, B7)] ^ C5[get_byte(5, B6)] ^
92 C6[get_byte(6, B5)] ^ C7[get_byte(7, B4)] ^ K3;
93 T4 = C0[get_byte(0, B4)] ^ C1[get_byte(1, B3)] ^
94 C2[get_byte(2, B2)] ^ C3[get_byte(3, B1)] ^
95 C4[get_byte(4, B0)] ^ C5[get_byte(5, B7)] ^
96 C6[get_byte(6, B6)] ^ C7[get_byte(7, B5)] ^ K4;
97 T5 = C0[get_byte(0, B5)] ^ C1[get_byte(1, B4)] ^
98 C2[get_byte(2, B3)] ^ C3[get_byte(3, B2)] ^
99 C4[get_byte(4, B1)] ^ C5[get_byte(5, B0)] ^
100 C6[get_byte(6, B7)] ^ C7[get_byte(7, B6)] ^ K5;
101 T6 = C0[get_byte(0, B6)] ^ C1[get_byte(1, B5)] ^
102 C2[get_byte(2, B4)] ^ C3[get_byte(3, B3)] ^
103 C4[get_byte(4, B2)] ^ C5[get_byte(5, B1)] ^
104 C6[get_byte(6, B0)] ^ C7[get_byte(7, B7)] ^ K6;
105 T7 = C0[get_byte(0, B7)] ^ C1[get_byte(1, B6)] ^
106 C2[get_byte(2, B5)] ^ C3[get_byte(3, B4)] ^
107 C4[get_byte(4, B3)] ^ C5[get_byte(5, B2)] ^
108 C6[get_byte(6, B1)] ^ C7[get_byte(7, B0)] ^ K7;
109
110 B0 = T0; B1 = T1; B2 = T2; B3 = T3;
111 B4 = T4; B5 = T5; B6 = T6; B7 = T7;
112 }
113
114 digest[0] ^= B0 ^ M[0];
115 digest[1] ^= B1 ^ M[1];
116 digest[2] ^= B2 ^ M[2];
117 digest[3] ^= B3 ^ M[3];
118 digest[4] ^= B4 ^ M[4];
119 digest[5] ^= B5 ^ M[5];
120 digest[6] ^= B6 ^ M[6];
121 digest[7] ^= B7 ^ M[7];
122
123 in += hash_block_size();
124 }
125 }
126
127 /*
128 * Copy out the digest
129 */
130 void Whirlpool::copy_out(byte output[])
131 {
132 for(size_t i = 0; i != output_length(); i += 8)
133 store_be(digest[i/8], output + i);
134 }
135
136 /*
137 * Clear memory of sensitive data
138 */
139 void Whirlpool::clear()
140 {
141 MDx_HashFunction::clear();
142 zeroise(M);
143 zeroise(digest);
144 }
145
146 }
Botan::load_be
T load_be(const byte in[], size_t off)
Definition: loadstor.h:100
Botan::Whirlpool::output_length
size_t output_length() const
Definition: whrlpool.h:22
Botan::get_byte
byte get_byte(size_t byte_num, T input)
Definition: get_byte.h:21
Botan::byte
unsigned char byte
Definition: types.h:22
Botan::u64bit
unsigned long long u64bit
Definition: types.h:49
Botan
Definition: algo_base.h:14
Botan::MemoryRegion::size
size_t size() const
Definition: secmem.h:29
Botan::store_be
void store_be(u16bit in, byte out[2])
Definition: loadstor.h:412
Botan::MDx_HashFunction::clear
void clear()
Definition: mdx_hash.cpp:32
Botan::MDx_HashFunction::hash_block_size
size_t hash_block_size() const
Definition: mdx_hash.h:32
Botan::zeroise
void zeroise(MemoryRegion< T > &vec)
Definition: secmem.h:428
Botan::Whirlpool::clear
void clear()
Definition: whrlpool.cpp:139