/src/botan/src/lib/block/seed/seed.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * SEED |
3 | | * (C) 1999-2007,2020 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #include <botan/internal/seed.h> |
9 | | #include <botan/internal/loadstor.h> |
10 | | |
11 | | namespace Botan { |
12 | | |
13 | | namespace { |
14 | | |
15 | | alignas(256) const uint8_t SEED_S0[256] = { |
16 | | 0xA9, 0x85, 0xD6, 0xD3, 0x54, 0x1D, 0xAC, 0x25, 0x5D, 0x43, 0x18, 0x1E, 0x51, 0xFC, 0xCA, 0x63, |
17 | | 0x28, 0x44, 0x20, 0x9D, 0xE0, 0xE2, 0xC8, 0x17, 0xA5, 0x8F, 0x03, 0x7B, 0xBB, 0x13, 0xD2, 0xEE, |
18 | | 0x70, 0x8C, 0x3F, 0xA8, 0x32, 0xDD, 0xF6, 0x74, 0xEC, 0x95, 0x0B, 0x57, 0x5C, 0x5B, 0xBD, 0x01, |
19 | | 0x24, 0x1C, 0x73, 0x98, 0x10, 0xCC, 0xF2, 0xD9, 0x2C, 0xE7, 0x72, 0x83, 0x9B, 0xD1, 0x86, 0xC9, |
20 | | 0x60, 0x50, 0xA3, 0xEB, 0x0D, 0xB6, 0x9E, 0x4F, 0xB7, 0x5A, 0xC6, 0x78, 0xA6, 0x12, 0xAF, 0xD5, |
21 | | 0x61, 0xC3, 0xB4, 0x41, 0x52, 0x7D, 0x8D, 0x08, 0x1F, 0x99, 0x00, 0x19, 0x04, 0x53, 0xF7, 0xE1, |
22 | | 0xFD, 0x76, 0x2F, 0x27, 0xB0, 0x8B, 0x0E, 0xAB, 0xA2, 0x6E, 0x93, 0x4D, 0x69, 0x7C, 0x09, 0x0A, |
23 | | 0xBF, 0xEF, 0xF3, 0xC5, 0x87, 0x14, 0xFE, 0x64, 0xDE, 0x2E, 0x4B, 0x1A, 0x06, 0x21, 0x6B, 0x66, |
24 | | 0x02, 0xF5, 0x92, 0x8A, 0x0C, 0xB3, 0x7E, 0xD0, 0x7A, 0x47, 0x96, 0xE5, 0x26, 0x80, 0xAD, 0xDF, |
25 | | 0xA1, 0x30, 0x37, 0xAE, 0x36, 0x15, 0x22, 0x38, 0xF4, 0xA7, 0x45, 0x4C, 0x81, 0xE9, 0x84, 0x97, |
26 | | 0x35, 0xCB, 0xCE, 0x3C, 0x71, 0x11, 0xC7, 0x89, 0x75, 0xFB, 0xDA, 0xF8, 0x94, 0x59, 0x82, 0xC4, |
27 | | 0xFF, 0x49, 0x39, 0x67, 0xC0, 0xCF, 0xD7, 0xB8, 0x0F, 0x8E, 0x42, 0x23, 0x91, 0x6C, 0xDB, 0xA4, |
28 | | 0x34, 0xF1, 0x48, 0xC2, 0x6F, 0x3D, 0x2D, 0x40, 0xBE, 0x3E, 0xBC, 0xC1, 0xAA, 0xBA, 0x4E, 0x55, |
29 | | 0x3B, 0xDC, 0x68, 0x7F, 0x9C, 0xD8, 0x4A, 0x56, 0x77, 0xA0, 0xED, 0x46, 0xB5, 0x2B, 0x65, 0xFA, |
30 | | 0xE3, 0xB9, 0xB1, 0x9F, 0x5E, 0xF9, 0xE6, 0xB2, 0x31, 0xEA, 0x6D, 0x5F, 0xE4, 0xF0, 0xCD, 0x88, |
31 | | 0x16, 0x3A, 0x58, 0xD4, 0x62, 0x29, 0x07, 0x33, 0xE8, 0x1B, 0x05, 0x79, 0x90, 0x6A, 0x2A, 0x9A, |
32 | | }; |
33 | | |
34 | | alignas(256) const uint8_t SEED_S1[256] = { |
35 | | 0x38, 0xE8, 0x2D, 0xA6, 0xCF, 0xDE, 0xB3, 0xB8, 0xAF, 0x60, 0x55, 0xC7, 0x44, 0x6F, 0x6B, 0x5B, |
36 | | 0xC3, 0x62, 0x33, 0xB5, 0x29, 0xA0, 0xE2, 0xA7, 0xD3, 0x91, 0x11, 0x06, 0x1C, 0xBC, 0x36, 0x4B, |
37 | | 0xEF, 0x88, 0x6C, 0xA8, 0x17, 0xC4, 0x16, 0xF4, 0xC2, 0x45, 0xE1, 0xD6, 0x3F, 0x3D, 0x8E, 0x98, |
38 | | 0x28, 0x4E, 0xF6, 0x3E, 0xA5, 0xF9, 0x0D, 0xDF, 0xD8, 0x2B, 0x66, 0x7A, 0x27, 0x2F, 0xF1, 0x72, |
39 | | 0x42, 0xD4, 0x41, 0xC0, 0x73, 0x67, 0xAC, 0x8B, 0xF7, 0xAD, 0x80, 0x1F, 0xCA, 0x2C, 0xAA, 0x34, |
40 | | 0xD2, 0x0B, 0xEE, 0xE9, 0x5D, 0x94, 0x18, 0xF8, 0x57, 0xAE, 0x08, 0xC5, 0x13, 0xCD, 0x86, 0xB9, |
41 | | 0xFF, 0x7D, 0xC1, 0x31, 0xF5, 0x8A, 0x6A, 0xB1, 0xD1, 0x20, 0xD7, 0x02, 0x22, 0x04, 0x68, 0x71, |
42 | | 0x07, 0xDB, 0x9D, 0x99, 0x61, 0xBE, 0xE6, 0x59, 0xDD, 0x51, 0x90, 0xDC, 0x9A, 0xA3, 0xAB, 0xD0, |
43 | | 0x81, 0x0F, 0x47, 0x1A, 0xE3, 0xEC, 0x8D, 0xBF, 0x96, 0x7B, 0x5C, 0xA2, 0xA1, 0x63, 0x23, 0x4D, |
44 | | 0xC8, 0x9E, 0x9C, 0x3A, 0x0C, 0x2E, 0xBA, 0x6E, 0x9F, 0x5A, 0xF2, 0x92, 0xF3, 0x49, 0x78, 0xCC, |
45 | | 0x15, 0xFB, 0x70, 0x75, 0x7F, 0x35, 0x10, 0x03, 0x64, 0x6D, 0xC6, 0x74, 0xD5, 0xB4, 0xEA, 0x09, |
46 | | 0x76, 0x19, 0xFE, 0x40, 0x12, 0xE0, 0xBD, 0x05, 0xFA, 0x01, 0xF0, 0x2A, 0x5E, 0xA9, 0x56, 0x43, |
47 | | 0x85, 0x14, 0x89, 0x9B, 0xB0, 0xE5, 0x48, 0x79, 0x97, 0xFC, 0x1E, 0x82, 0x21, 0x8C, 0x1B, 0x5F, |
48 | | 0x77, 0x54, 0xB2, 0x1D, 0x25, 0x4F, 0x00, 0x46, 0xED, 0x58, 0x52, 0xEB, 0x7E, 0xDA, 0xC9, 0xFD, |
49 | | 0x30, 0x95, 0x65, 0x3C, 0xB6, 0xE4, 0xBB, 0x7C, 0x0E, 0x50, 0x39, 0x26, 0x32, 0x84, 0x69, 0x93, |
50 | | 0x37, 0xE7, 0x24, 0xA4, 0xCB, 0x53, 0x0A, 0x87, 0xD9, 0x4C, 0x83, 0x8F, 0xCE, 0x3B, 0x4A, 0xB7, |
51 | | }; |
52 | | |
53 | | /* |
54 | | * SEED G Function |
55 | | */ |
56 | | inline uint32_t SEED_G(uint32_t X) |
57 | 0 | { |
58 | 0 | const uint32_t M = 0x01010101; |
59 | 0 | const uint32_t s0 = M * SEED_S0[get_byte<3>(X)]; |
60 | 0 | const uint32_t s1 = M * SEED_S1[get_byte<2>(X)]; |
61 | 0 | const uint32_t s2 = M * SEED_S0[get_byte<1>(X)]; |
62 | 0 | const uint32_t s3 = M * SEED_S1[get_byte<0>(X)]; |
63 | |
|
64 | 0 | const uint32_t M0 = 0x3FCFF3FC; |
65 | 0 | const uint32_t M1 = 0xFC3FCFF3; |
66 | 0 | const uint32_t M2 = 0xF3FC3FCF; |
67 | 0 | const uint32_t M3 = 0xCFF3FC3F; |
68 | |
|
69 | 0 | return (s0 & M0) ^ (s1 & M1) ^ (s2 & M2) ^ (s3 & M3); |
70 | 0 | } |
71 | | |
72 | | } |
73 | | |
74 | | /* |
75 | | * SEED Encryption |
76 | | */ |
77 | | void SEED::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const |
78 | 0 | { |
79 | 0 | verify_key_set(m_K.empty() == false); |
80 | |
|
81 | 0 | for(size_t i = 0; i != blocks; ++i) |
82 | 0 | { |
83 | 0 | uint32_t B0 = load_be<uint32_t>(in, 0); |
84 | 0 | uint32_t B1 = load_be<uint32_t>(in, 1); |
85 | 0 | uint32_t B2 = load_be<uint32_t>(in, 2); |
86 | 0 | uint32_t B3 = load_be<uint32_t>(in, 3); |
87 | |
|
88 | 0 | for(size_t j = 0; j != 16; j += 2) |
89 | 0 | { |
90 | 0 | uint32_t T0, T1; |
91 | |
|
92 | 0 | T0 = B2 ^ m_K[2*j]; |
93 | 0 | T1 = SEED_G(B2 ^ B3 ^ m_K[2*j+1]); |
94 | 0 | T0 = SEED_G(T1 + T0); |
95 | 0 | T1 = SEED_G(T1 + T0); |
96 | 0 | B1 ^= T1; |
97 | 0 | B0 ^= T0 + T1; |
98 | |
|
99 | 0 | T0 = B0 ^ m_K[2*j+2]; |
100 | 0 | T1 = SEED_G(B0 ^ B1 ^ m_K[2*j+3]); |
101 | 0 | T0 = SEED_G(T1 + T0); |
102 | 0 | T1 = SEED_G(T1 + T0); |
103 | 0 | B3 ^= T1; |
104 | 0 | B2 ^= T0 + T1; |
105 | 0 | } |
106 | |
|
107 | 0 | store_be(out, B2, B3, B0, B1); |
108 | |
|
109 | 0 | in += BLOCK_SIZE; |
110 | 0 | out += BLOCK_SIZE; |
111 | 0 | } |
112 | 0 | } |
113 | | |
114 | | /* |
115 | | * SEED Decryption |
116 | | */ |
117 | | void SEED::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const |
118 | 0 | { |
119 | 0 | verify_key_set(m_K.empty() == false); |
120 | |
|
121 | 0 | for(size_t i = 0; i != blocks; ++i) |
122 | 0 | { |
123 | 0 | uint32_t B0 = load_be<uint32_t>(in, 0); |
124 | 0 | uint32_t B1 = load_be<uint32_t>(in, 1); |
125 | 0 | uint32_t B2 = load_be<uint32_t>(in, 2); |
126 | 0 | uint32_t B3 = load_be<uint32_t>(in, 3); |
127 | |
|
128 | 0 | for(size_t j = 0; j != 16; j += 2) |
129 | 0 | { |
130 | 0 | uint32_t T0, T1; |
131 | |
|
132 | 0 | T0 = B2 ^ m_K[30-2*j]; |
133 | 0 | T1 = SEED_G(B2 ^ B3 ^ m_K[31-2*j]); |
134 | 0 | T0 = SEED_G(T1 + T0); |
135 | 0 | T1 = SEED_G(T1 + T0); |
136 | 0 | B1 ^= T1; |
137 | 0 | B0 ^= T0 + T1; |
138 | |
|
139 | 0 | T0 = B0 ^ m_K[28-2*j]; |
140 | 0 | T1 = SEED_G(B0 ^ B1 ^ m_K[29-2*j]); |
141 | 0 | T0 = SEED_G(T1 + T0); |
142 | 0 | T1 = SEED_G(T1 + T0); |
143 | 0 | B3 ^= T1; |
144 | 0 | B2 ^= T0 + T1; |
145 | 0 | } |
146 | |
|
147 | 0 | store_be(out, B2, B3, B0, B1); |
148 | |
|
149 | 0 | in += BLOCK_SIZE; |
150 | 0 | out += BLOCK_SIZE; |
151 | 0 | } |
152 | 0 | } |
153 | | |
154 | | /* |
155 | | * SEED Key Schedule |
156 | | */ |
157 | | void SEED::key_schedule(const uint8_t key[], size_t) |
158 | 0 | { |
159 | 0 | const uint32_t RC[16] = { |
160 | 0 | 0x9E3779B9, 0x3C6EF373, 0x78DDE6E6, 0xF1BBCDCC, |
161 | 0 | 0xE3779B99, 0xC6EF3733, 0x8DDE6E67, 0x1BBCDCCF, |
162 | 0 | 0x3779B99E, 0x6EF3733C, 0xDDE6E678, 0xBBCDCCF1, |
163 | 0 | 0x779B99E3, 0xEF3733C6, 0xDE6E678D, 0xBCDCCF1B |
164 | 0 | }; |
165 | |
|
166 | 0 | secure_vector<uint32_t> WK(4); |
167 | |
|
168 | 0 | for(size_t i = 0; i != 4; ++i) |
169 | 0 | WK[i] = load_be<uint32_t>(key, i); |
170 | |
|
171 | 0 | m_K.resize(32); |
172 | |
|
173 | 0 | for(size_t i = 0; i != 16; i += 2) |
174 | 0 | { |
175 | 0 | m_K[2*i ] = SEED_G(WK[0] + WK[2] - RC[i]); |
176 | 0 | m_K[2*i+1] = SEED_G(WK[1] - WK[3] + RC[i]) ^ m_K[2*i]; |
177 | |
|
178 | 0 | uint32_t T = (WK[0] & 0xFF) << 24; |
179 | 0 | WK[0] = (WK[0] >> 8) | (get_byte<3>(WK[1]) << 24); |
180 | 0 | WK[1] = (WK[1] >> 8) | T; |
181 | |
|
182 | 0 | m_K[2*i+2] = SEED_G(WK[0] + WK[2] - RC[i+1]); |
183 | 0 | m_K[2*i+3] = SEED_G(WK[1] - WK[3] + RC[i+1]) ^ m_K[2*i+2]; |
184 | |
|
185 | 0 | T = get_byte<0>(WK[3]); |
186 | 0 | WK[3] = (WK[3] << 8) | get_byte<0>(WK[2]); |
187 | 0 | WK[2] = (WK[2] << 8) | T; |
188 | 0 | } |
189 | 0 | } |
190 | | |
191 | | void SEED::clear() |
192 | 0 | { |
193 | 0 | zap(m_K); |
194 | 0 | } |
195 | | |
196 | | } |