/src/botan/src/lib/block/sm4/sm4.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * SM4 |
3 | | * (C) 2017 Ribose Inc |
4 | | * (C) 2018 Jack Lloyd |
5 | | * |
6 | | * Botan is released under the Simplified BSD License (see license.txt) |
7 | | */ |
8 | | |
9 | | #include <botan/internal/sm4.h> |
10 | | #include <botan/internal/loadstor.h> |
11 | | #include <botan/internal/rotate.h> |
12 | | #include <botan/internal/cpuid.h> |
13 | | |
14 | | namespace Botan { |
15 | | |
16 | | namespace { |
17 | | |
18 | | alignas(256) const uint8_t SM4_SBOX[256] = { |
19 | | 0xD6, 0x90, 0xE9, 0xFE, 0xCC, 0xE1, 0x3D, 0xB7, 0x16, 0xB6, 0x14, 0xC2, 0x28, 0xFB, 0x2C, 0x05, |
20 | | 0x2B, 0x67, 0x9A, 0x76, 0x2A, 0xBE, 0x04, 0xC3, 0xAA, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, |
21 | | 0x9C, 0x42, 0x50, 0xF4, 0x91, 0xEF, 0x98, 0x7A, 0x33, 0x54, 0x0B, 0x43, 0xED, 0xCF, 0xAC, 0x62, |
22 | | 0xE4, 0xB3, 0x1C, 0xA9, 0xC9, 0x08, 0xE8, 0x95, 0x80, 0xDF, 0x94, 0xFA, 0x75, 0x8F, 0x3F, 0xA6, |
23 | | 0x47, 0x07, 0xA7, 0xFC, 0xF3, 0x73, 0x17, 0xBA, 0x83, 0x59, 0x3C, 0x19, 0xE6, 0x85, 0x4F, 0xA8, |
24 | | 0x68, 0x6B, 0x81, 0xB2, 0x71, 0x64, 0xDA, 0x8B, 0xF8, 0xEB, 0x0F, 0x4B, 0x70, 0x56, 0x9D, 0x35, |
25 | | 0x1E, 0x24, 0x0E, 0x5E, 0x63, 0x58, 0xD1, 0xA2, 0x25, 0x22, 0x7C, 0x3B, 0x01, 0x21, 0x78, 0x87, |
26 | | 0xD4, 0x00, 0x46, 0x57, 0x9F, 0xD3, 0x27, 0x52, 0x4C, 0x36, 0x02, 0xE7, 0xA0, 0xC4, 0xC8, 0x9E, |
27 | | 0xEA, 0xBF, 0x8A, 0xD2, 0x40, 0xC7, 0x38, 0xB5, 0xA3, 0xF7, 0xF2, 0xCE, 0xF9, 0x61, 0x15, 0xA1, |
28 | | 0xE0, 0xAE, 0x5D, 0xA4, 0x9B, 0x34, 0x1A, 0x55, 0xAD, 0x93, 0x32, 0x30, 0xF5, 0x8C, 0xB1, 0xE3, |
29 | | 0x1D, 0xF6, 0xE2, 0x2E, 0x82, 0x66, 0xCA, 0x60, 0xC0, 0x29, 0x23, 0xAB, 0x0D, 0x53, 0x4E, 0x6F, |
30 | | 0xD5, 0xDB, 0x37, 0x45, 0xDE, 0xFD, 0x8E, 0x2F, 0x03, 0xFF, 0x6A, 0x72, 0x6D, 0x6C, 0x5B, 0x51, |
31 | | 0x8D, 0x1B, 0xAF, 0x92, 0xBB, 0xDD, 0xBC, 0x7F, 0x11, 0xD9, 0x5C, 0x41, 0x1F, 0x10, 0x5A, 0xD8, |
32 | | 0x0A, 0xC1, 0x31, 0x88, 0xA5, 0xCD, 0x7B, 0xBD, 0x2D, 0x74, 0xD0, 0x12, 0xB8, 0xE5, 0xB4, 0xB0, |
33 | | 0x89, 0x69, 0x97, 0x4A, 0x0C, 0x96, 0x77, 0x7E, 0x65, 0xB9, 0xF1, 0x09, 0xC5, 0x6E, 0xC6, 0x84, |
34 | | 0x18, 0xF0, 0x7D, 0xEC, 0x3A, 0xDC, 0x4D, 0x20, 0x79, 0xEE, 0x5F, 0x3E, 0xD7, 0xCB, 0x39, 0x48 |
35 | | }; |
36 | | |
37 | | /* |
38 | | * SM4_SBOX_T[j] == L(SM4_SBOX[j]). |
39 | | */ |
40 | | alignas(256) const uint32_t SM4_SBOX_T[256] = { |
41 | | 0x8ED55B5B, 0xD0924242, 0x4DEAA7A7, 0x06FDFBFB, 0xFCCF3333, 0x65E28787, |
42 | | 0xC93DF4F4, 0x6BB5DEDE, 0x4E165858, 0x6EB4DADA, 0x44145050, 0xCAC10B0B, |
43 | | 0x8828A0A0, 0x17F8EFEF, 0x9C2CB0B0, 0x11051414, 0x872BACAC, 0xFB669D9D, |
44 | | 0xF2986A6A, 0xAE77D9D9, 0x822AA8A8, 0x46BCFAFA, 0x14041010, 0xCFC00F0F, |
45 | | 0x02A8AAAA, 0x54451111, 0x5F134C4C, 0xBE269898, 0x6D482525, 0x9E841A1A, |
46 | | 0x1E061818, 0xFD9B6666, 0xEC9E7272, 0x4A430909, 0x10514141, 0x24F7D3D3, |
47 | | 0xD5934646, 0x53ECBFBF, 0xF89A6262, 0x927BE9E9, 0xFF33CCCC, 0x04555151, |
48 | | 0x270B2C2C, 0x4F420D0D, 0x59EEB7B7, 0xF3CC3F3F, 0x1CAEB2B2, 0xEA638989, |
49 | | 0x74E79393, 0x7FB1CECE, 0x6C1C7070, 0x0DABA6A6, 0xEDCA2727, 0x28082020, |
50 | | 0x48EBA3A3, 0xC1975656, 0x80820202, 0xA3DC7F7F, 0xC4965252, 0x12F9EBEB, |
51 | | 0xA174D5D5, 0xB38D3E3E, 0xC33FFCFC, 0x3EA49A9A, 0x5B461D1D, 0x1B071C1C, |
52 | | 0x3BA59E9E, 0x0CFFF3F3, 0x3FF0CFCF, 0xBF72CDCD, 0x4B175C5C, 0x52B8EAEA, |
53 | | 0x8F810E0E, 0x3D586565, 0xCC3CF0F0, 0x7D196464, 0x7EE59B9B, 0x91871616, |
54 | | 0x734E3D3D, 0x08AAA2A2, 0xC869A1A1, 0xC76AADAD, 0x85830606, 0x7AB0CACA, |
55 | | 0xB570C5C5, 0xF4659191, 0xB2D96B6B, 0xA7892E2E, 0x18FBE3E3, 0x47E8AFAF, |
56 | | 0x330F3C3C, 0x674A2D2D, 0xB071C1C1, 0x0E575959, 0xE99F7676, 0xE135D4D4, |
57 | | 0x661E7878, 0xB4249090, 0x360E3838, 0x265F7979, 0xEF628D8D, 0x38596161, |
58 | | 0x95D24747, 0x2AA08A8A, 0xB1259494, 0xAA228888, 0x8C7DF1F1, 0xD73BECEC, |
59 | | 0x05010404, 0xA5218484, 0x9879E1E1, 0x9B851E1E, 0x84D75353, 0x00000000, |
60 | | 0x5E471919, 0x0B565D5D, 0xE39D7E7E, 0x9FD04F4F, 0xBB279C9C, 0x1A534949, |
61 | | 0x7C4D3131, 0xEE36D8D8, 0x0A020808, 0x7BE49F9F, 0x20A28282, 0xD4C71313, |
62 | | 0xE8CB2323, 0xE69C7A7A, 0x42E9ABAB, 0x43BDFEFE, 0xA2882A2A, 0x9AD14B4B, |
63 | | 0x40410101, 0xDBC41F1F, 0xD838E0E0, 0x61B7D6D6, 0x2FA18E8E, 0x2BF4DFDF, |
64 | | 0x3AF1CBCB, 0xF6CD3B3B, 0x1DFAE7E7, 0xE5608585, 0x41155454, 0x25A38686, |
65 | | 0x60E38383, 0x16ACBABA, 0x295C7575, 0x34A69292, 0xF7996E6E, 0xE434D0D0, |
66 | | 0x721A6868, 0x01545555, 0x19AFB6B6, 0xDF914E4E, 0xFA32C8C8, 0xF030C0C0, |
67 | | 0x21F6D7D7, 0xBC8E3232, 0x75B3C6C6, 0x6FE08F8F, 0x691D7474, 0x2EF5DBDB, |
68 | | 0x6AE18B8B, 0x962EB8B8, 0x8A800A0A, 0xFE679999, 0xE2C92B2B, 0xE0618181, |
69 | | 0xC0C30303, 0x8D29A4A4, 0xAF238C8C, 0x07A9AEAE, 0x390D3434, 0x1F524D4D, |
70 | | 0x764F3939, 0xD36EBDBD, 0x81D65757, 0xB7D86F6F, 0xEB37DCDC, 0x51441515, |
71 | | 0xA6DD7B7B, 0x09FEF7F7, 0xB68C3A3A, 0x932FBCBC, 0x0F030C0C, 0x03FCFFFF, |
72 | | 0xC26BA9A9, 0xBA73C9C9, 0xD96CB5B5, 0xDC6DB1B1, 0x375A6D6D, 0x15504545, |
73 | | 0xB98F3636, 0x771B6C6C, 0x13ADBEBE, 0xDA904A4A, 0x57B9EEEE, 0xA9DE7777, |
74 | | 0x4CBEF2F2, 0x837EFDFD, 0x55114444, 0xBDDA6767, 0x2C5D7171, 0x45400505, |
75 | | 0x631F7C7C, 0x50104040, 0x325B6969, 0xB8DB6363, 0x220A2828, 0xC5C20707, |
76 | | 0xF531C4C4, 0xA88A2222, 0x31A79696, 0xF9CE3737, 0x977AEDED, 0x49BFF6F6, |
77 | | 0x992DB4B4, 0xA475D1D1, 0x90D34343, 0x5A124848, 0x58BAE2E2, 0x71E69797, |
78 | | 0x64B6D2D2, 0x70B2C2C2, 0xAD8B2626, 0xCD68A5A5, 0xCB955E5E, 0x624B2929, |
79 | | 0x3C0C3030, 0xCE945A5A, 0xAB76DDDD, 0x867FF9F9, 0xF1649595, 0x5DBBE6E6, |
80 | | 0x35F2C7C7, 0x2D092424, 0xD1C61717, 0xD66FB9B9, 0xDEC51B1B, 0x94861212, |
81 | | 0x78186060, 0x30F3C3C3, 0x897CF5F5, 0x5CEFB3B3, 0xD23AE8E8, 0xACDF7373, |
82 | | 0x794C3535, 0xA0208080, 0x9D78E5E5, 0x56EDBBBB, 0x235E7D7D, 0xC63EF8F8, |
83 | | 0x8BD45F5F, 0xE7C82F2F, 0xDD39E4E4, 0x68492121 }; |
84 | | |
85 | | inline uint32_t SM4_T_slow(uint32_t b) |
86 | 0 | { |
87 | 0 | const uint32_t t = make_uint32(SM4_SBOX[get_byte<0>(b)], |
88 | 0 | SM4_SBOX[get_byte<1>(b)], |
89 | 0 | SM4_SBOX[get_byte<2>(b)], |
90 | 0 | SM4_SBOX[get_byte<3>(b)]); |
91 | | |
92 | | // L linear transform |
93 | 0 | return t ^ rotl<2>(t) ^ rotl<10>(t) ^ rotl<18>(t) ^ rotl<24>(t); |
94 | 0 | } |
95 | | |
96 | | inline uint32_t SM4_T(uint32_t b) |
97 | 0 | { |
98 | 0 | return SM4_SBOX_T[get_byte<0>(b)] ^ |
99 | 0 | rotr< 8>(SM4_SBOX_T[get_byte<1>(b)]) ^ |
100 | 0 | rotr<16>(SM4_SBOX_T[get_byte<2>(b)]) ^ |
101 | 0 | rotr<24>(SM4_SBOX_T[get_byte<3>(b)]); |
102 | 0 | } |
103 | | |
104 | | // Variant of T for key schedule |
105 | | inline uint32_t SM4_Tp(uint32_t b) |
106 | 0 | { |
107 | 0 | const uint32_t t = make_uint32(SM4_SBOX[get_byte<0>(b)], |
108 | 0 | SM4_SBOX[get_byte<1>(b)], |
109 | 0 | SM4_SBOX[get_byte<2>(b)], |
110 | 0 | SM4_SBOX[get_byte<3>(b)]); |
111 | | |
112 | | // L' linear transform |
113 | 0 | return t ^ rotl<13>(t) ^ rotl<23>(t); |
114 | 0 | } |
115 | | |
116 | 0 | #define SM4_E_RNDS(B, R, F) do { \ |
117 | 0 | B##0 ^= F(B##1 ^ B##2 ^ B##3 ^ m_RK[4*R+0]); \ |
118 | 0 | B##1 ^= F(B##2 ^ B##3 ^ B##0 ^ m_RK[4*R+1]); \ |
119 | 0 | B##2 ^= F(B##3 ^ B##0 ^ B##1 ^ m_RK[4*R+2]); \ |
120 | 0 | B##3 ^= F(B##0 ^ B##1 ^ B##2 ^ m_RK[4*R+3]); \ |
121 | 0 | } while(0) |
122 | | |
123 | 0 | #define SM4_D_RNDS(B, R, F) do { \ |
124 | 0 | B##0 ^= F(B##1 ^ B##2 ^ B##3 ^ m_RK[4*R+3]); \ |
125 | 0 | B##1 ^= F(B##2 ^ B##3 ^ B##0 ^ m_RK[4*R+2]); \ |
126 | 0 | B##2 ^= F(B##3 ^ B##0 ^ B##1 ^ m_RK[4*R+1]); \ |
127 | 0 | B##3 ^= F(B##0 ^ B##1 ^ B##2 ^ m_RK[4*R+0]); \ |
128 | 0 | } while(0) |
129 | | |
130 | | } |
131 | | |
132 | | /* |
133 | | * SM4 Encryption |
134 | | */ |
135 | | void SM4::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const |
136 | 0 | { |
137 | 0 | verify_key_set(m_RK.empty() == false); |
138 | |
|
139 | | #if defined(BOTAN_HAS_SM4_ARMV8) |
140 | | if(CPUID::has_arm_sm4()) |
141 | | return sm4_armv8_encrypt(in, out, blocks); |
142 | | #endif |
143 | |
|
144 | 0 | while(blocks >= 2) |
145 | 0 | { |
146 | 0 | uint32_t B0 = load_be<uint32_t>(in, 0); |
147 | 0 | uint32_t B1 = load_be<uint32_t>(in, 1); |
148 | 0 | uint32_t B2 = load_be<uint32_t>(in, 2); |
149 | 0 | uint32_t B3 = load_be<uint32_t>(in, 3); |
150 | |
|
151 | 0 | uint32_t C0 = load_be<uint32_t>(in, 4); |
152 | 0 | uint32_t C1 = load_be<uint32_t>(in, 5); |
153 | 0 | uint32_t C2 = load_be<uint32_t>(in, 6); |
154 | 0 | uint32_t C3 = load_be<uint32_t>(in, 7); |
155 | |
|
156 | 0 | SM4_E_RNDS(B, 0, SM4_T_slow); |
157 | 0 | SM4_E_RNDS(C, 0, SM4_T_slow); |
158 | 0 | SM4_E_RNDS(B, 1, SM4_T); |
159 | 0 | SM4_E_RNDS(C, 1, SM4_T); |
160 | 0 | SM4_E_RNDS(B, 2, SM4_T); |
161 | 0 | SM4_E_RNDS(C, 2, SM4_T); |
162 | 0 | SM4_E_RNDS(B, 3, SM4_T); |
163 | 0 | SM4_E_RNDS(C, 3, SM4_T); |
164 | 0 | SM4_E_RNDS(B, 4, SM4_T); |
165 | 0 | SM4_E_RNDS(C, 4, SM4_T); |
166 | 0 | SM4_E_RNDS(B, 5, SM4_T); |
167 | 0 | SM4_E_RNDS(C, 5, SM4_T); |
168 | 0 | SM4_E_RNDS(B, 6, SM4_T); |
169 | 0 | SM4_E_RNDS(C, 6, SM4_T); |
170 | 0 | SM4_E_RNDS(B, 7, SM4_T_slow); |
171 | 0 | SM4_E_RNDS(C, 7, SM4_T_slow); |
172 | |
|
173 | 0 | store_be(out, B3, B2, B1, B0, C3, C2, C1, C0); |
174 | |
|
175 | 0 | in += 2*BLOCK_SIZE; |
176 | 0 | out += 2*BLOCK_SIZE; |
177 | 0 | blocks -= 2; |
178 | 0 | } |
179 | |
|
180 | 0 | for(size_t i = 0; i != blocks; ++i) |
181 | 0 | { |
182 | 0 | uint32_t B0 = load_be<uint32_t>(in, 0); |
183 | 0 | uint32_t B1 = load_be<uint32_t>(in, 1); |
184 | 0 | uint32_t B2 = load_be<uint32_t>(in, 2); |
185 | 0 | uint32_t B3 = load_be<uint32_t>(in, 3); |
186 | |
|
187 | 0 | SM4_E_RNDS(B, 0, SM4_T_slow); |
188 | 0 | SM4_E_RNDS(B, 1, SM4_T); |
189 | 0 | SM4_E_RNDS(B, 2, SM4_T); |
190 | 0 | SM4_E_RNDS(B, 3, SM4_T); |
191 | 0 | SM4_E_RNDS(B, 4, SM4_T); |
192 | 0 | SM4_E_RNDS(B, 5, SM4_T); |
193 | 0 | SM4_E_RNDS(B, 6, SM4_T); |
194 | 0 | SM4_E_RNDS(B, 7, SM4_T_slow); |
195 | |
|
196 | 0 | store_be(out, B3, B2, B1, B0); |
197 | |
|
198 | 0 | in += BLOCK_SIZE; |
199 | 0 | out += BLOCK_SIZE; |
200 | 0 | } |
201 | 0 | } |
202 | | |
203 | | /* |
204 | | * SM4 Decryption |
205 | | */ |
206 | | void SM4::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const |
207 | 0 | { |
208 | 0 | verify_key_set(m_RK.empty() == false); |
209 | |
|
210 | | #if defined(BOTAN_HAS_SM4_ARMV8) |
211 | | if(CPUID::has_arm_sm4()) |
212 | | return sm4_armv8_decrypt(in, out, blocks); |
213 | | #endif |
214 | |
|
215 | 0 | while(blocks >= 2) |
216 | 0 | { |
217 | 0 | uint32_t B0 = load_be<uint32_t>(in, 0); |
218 | 0 | uint32_t B1 = load_be<uint32_t>(in, 1); |
219 | 0 | uint32_t B2 = load_be<uint32_t>(in, 2); |
220 | 0 | uint32_t B3 = load_be<uint32_t>(in, 3); |
221 | |
|
222 | 0 | uint32_t C0 = load_be<uint32_t>(in, 4); |
223 | 0 | uint32_t C1 = load_be<uint32_t>(in, 5); |
224 | 0 | uint32_t C2 = load_be<uint32_t>(in, 6); |
225 | 0 | uint32_t C3 = load_be<uint32_t>(in, 7); |
226 | |
|
227 | 0 | SM4_D_RNDS(B, 7, SM4_T_slow); |
228 | 0 | SM4_D_RNDS(C, 7, SM4_T_slow); |
229 | 0 | SM4_D_RNDS(B, 6, SM4_T); |
230 | 0 | SM4_D_RNDS(C, 6, SM4_T); |
231 | 0 | SM4_D_RNDS(B, 5, SM4_T); |
232 | 0 | SM4_D_RNDS(C, 5, SM4_T); |
233 | 0 | SM4_D_RNDS(B, 4, SM4_T); |
234 | 0 | SM4_D_RNDS(C, 4, SM4_T); |
235 | 0 | SM4_D_RNDS(B, 3, SM4_T); |
236 | 0 | SM4_D_RNDS(C, 3, SM4_T); |
237 | 0 | SM4_D_RNDS(B, 2, SM4_T); |
238 | 0 | SM4_D_RNDS(C, 2, SM4_T); |
239 | 0 | SM4_D_RNDS(B, 1, SM4_T); |
240 | 0 | SM4_D_RNDS(C, 1, SM4_T); |
241 | 0 | SM4_D_RNDS(B, 0, SM4_T_slow); |
242 | 0 | SM4_D_RNDS(C, 0, SM4_T_slow); |
243 | |
|
244 | 0 | store_be(out, B3, B2, B1, B0, C3, C2, C1, C0); |
245 | |
|
246 | 0 | in += 2*BLOCK_SIZE; |
247 | 0 | out += 2*BLOCK_SIZE; |
248 | 0 | blocks -= 2; |
249 | 0 | } |
250 | |
|
251 | 0 | for(size_t i = 0; i != blocks; ++i) |
252 | 0 | { |
253 | 0 | uint32_t B0 = load_be<uint32_t>(in, 0); |
254 | 0 | uint32_t B1 = load_be<uint32_t>(in, 1); |
255 | 0 | uint32_t B2 = load_be<uint32_t>(in, 2); |
256 | 0 | uint32_t B3 = load_be<uint32_t>(in, 3); |
257 | |
|
258 | 0 | SM4_D_RNDS(B, 7, SM4_T_slow); |
259 | 0 | SM4_D_RNDS(B, 6, SM4_T); |
260 | 0 | SM4_D_RNDS(B, 5, SM4_T); |
261 | 0 | SM4_D_RNDS(B, 4, SM4_T); |
262 | 0 | SM4_D_RNDS(B, 3, SM4_T); |
263 | 0 | SM4_D_RNDS(B, 2, SM4_T); |
264 | 0 | SM4_D_RNDS(B, 1, SM4_T); |
265 | 0 | SM4_D_RNDS(B, 0, SM4_T_slow); |
266 | |
|
267 | 0 | store_be(out, B3, B2, B1, B0); |
268 | |
|
269 | 0 | in += BLOCK_SIZE; |
270 | 0 | out += BLOCK_SIZE; |
271 | 0 | } |
272 | 0 | } |
273 | | |
274 | | #undef SM4_E_RNDS |
275 | | #undef SM4_D_RNDS |
276 | | |
277 | | /* |
278 | | * SM4 Key Schedule |
279 | | */ |
280 | | void SM4::key_schedule(const uint8_t key[], size_t) |
281 | 0 | { |
282 | | // System parameter or family key |
283 | 0 | const uint32_t FK[4] = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc }; |
284 | |
|
285 | 0 | const uint32_t CK[32] = { |
286 | 0 | 0x00070E15, 0x1C232A31, 0x383F464D, 0x545B6269, |
287 | 0 | 0x70777E85, 0x8C939AA1, 0xA8AFB6BD, 0xC4CBD2D9, |
288 | 0 | 0xE0E7EEF5, 0xFC030A11, 0x181F262D, 0x343B4249, |
289 | 0 | 0x50575E65, 0x6C737A81, 0x888F969D, 0xA4ABB2B9, |
290 | 0 | 0xC0C7CED5, 0xDCE3EAF1, 0xF8FF060D, 0x141B2229, |
291 | 0 | 0x30373E45, 0x4C535A61, 0x686F767D, 0x848B9299, |
292 | 0 | 0xA0A7AEB5, 0xBCC3CAD1, 0xD8DFE6ED, 0xF4FB0209, |
293 | 0 | 0x10171E25, 0x2C333A41, 0x484F565D, 0x646B7279 |
294 | 0 | }; |
295 | |
|
296 | 0 | secure_vector<uint32_t> K(4); |
297 | 0 | K[0] = load_be<uint32_t>(key, 0) ^ FK[0]; |
298 | 0 | K[1] = load_be<uint32_t>(key, 1) ^ FK[1]; |
299 | 0 | K[2] = load_be<uint32_t>(key, 2) ^ FK[2]; |
300 | 0 | K[3] = load_be<uint32_t>(key, 3) ^ FK[3]; |
301 | |
|
302 | 0 | m_RK.resize(32); |
303 | 0 | for(size_t i = 0; i != 32; ++i) |
304 | 0 | { |
305 | 0 | K[i % 4] ^= SM4_Tp(K[(i+1)%4] ^ K[(i+2)%4] ^ K[(i+3)%4] ^ CK[i]); |
306 | 0 | m_RK[i] = K[i % 4]; |
307 | 0 | } |
308 | 0 | } |
309 | | |
310 | | void SM4::clear() |
311 | 0 | { |
312 | 0 | zap(m_RK); |
313 | 0 | } |
314 | | |
315 | | size_t SM4::parallelism() const |
316 | 0 | { |
317 | | #if defined(BOTAN_HAS_SM4_ARMV8) |
318 | | if(CPUID::has_arm_sm4()) |
319 | | { |
320 | | return 4; |
321 | | } |
322 | | #endif |
323 | |
|
324 | 0 | return 1; |
325 | 0 | } |
326 | | |
327 | | std::string SM4::provider() const |
328 | 0 | { |
329 | | #if defined(BOTAN_HAS_SM4_ARMV8) |
330 | | if(CPUID::has_arm_sm4()) |
331 | | { |
332 | | return "armv8"; |
333 | | } |
334 | | #endif |
335 | |
|
336 | 0 | return "base"; |
337 | 0 | } |
338 | | |
339 | | } |