Crypto++ 8.9
Free C++ class library of cryptographic schemes
sm4_simd.cpp
1// sm4_simd.cpp - written and placed in the public domain by
2// Markku-Juhani O. Saarinen and Jeffrey Walton
3//
4// This source file uses intrinsics and built-ins to gain access to
5// AESNI, ARM NEON and ARMv8a, and Power7 Altivec instructions. A separate
6// source file is needed because additional CXXFLAGS are required to enable
7// the appropriate instructions sets in some build configurations.
8//
9// AES-NI based on Markku-Juhani O. Saarinen work at https://github.com/mjosaarinen/sm4ni.
10//
11// ARMv8 is upcoming.
12
13#include "pch.h"
14#include "config.h"
15
16#include "sm4.h"
17#include "misc.h"
18
19// Uncomment for benchmarking C++ against SSE.
20// Do so in both simon.cpp and simon_simd.cpp.
21// #undef CRYPTOPP_AESNI_AVAILABLE
22
23#if (CRYPTOPP_AESNI_AVAILABLE)
24# include "adv_simd.h"
25# include <emmintrin.h>
26# include <tmmintrin.h>
27# include <wmmintrin.h>
28#endif
29
30// Squash MS LNK4221 and libtool warnings
31extern const char SM4_SIMD_FNAME[] = __FILE__;
32
33ANONYMOUS_NAMESPACE_BEGIN
34
35using CryptoPP::word32;
36
37#if (CRYPTOPP_AESNI_AVAILABLE)
38
39template <unsigned int R>
40inline __m128i ShiftLeft(const __m128i& val)
41{
42 return _mm_slli_epi32(val, R);
43}
44
45template <unsigned int R>
46inline __m128i ShiftRight(const __m128i& val)
47{
48 return _mm_srli_epi32(val, R);
49}
50
51template <unsigned int R>
52inline __m128i ShiftLeft64(const __m128i& val)
53{
54 return _mm_slli_epi64(val, R);
55}
56
57template <unsigned int R>
58inline __m128i ShiftRight64(const __m128i& val)
59{
60 return _mm_srli_epi64(val, R);
61}
62
63template <unsigned int R>
64inline __m128i RotateLeft(const __m128i& val)
65{
66 return _mm_or_si128(
67 _mm_slli_epi32(val, R), _mm_srli_epi32(val, 32-R));
68}
69
70template <unsigned int R>
71inline __m128i RotateRight(const __m128i& val)
72{
73 return _mm_or_si128(
74 _mm_slli_epi32(val, 32-R), _mm_srli_epi32(val, R));
75}
76
77template <>
78inline __m128i RotateLeft<8>(const __m128i& val)
79{
80 const __m128i r08 = _mm_set_epi32(0x0E0D0C0F, 0x0A09080B, 0x06050407, 0x02010003);
81 return _mm_shuffle_epi8(val, r08);
82}
83
84template <>
85inline __m128i RotateLeft<16>(const __m128i& val)
86{
87 const __m128i mask = _mm_set_epi32(0x0D0C0F0E, 0x09080B0A, 0x05040706, 0x01000302);
88 return _mm_shuffle_epi8(val, mask);
89}
90
91template <>
92inline __m128i RotateLeft<24>(const __m128i& val)
93{
94 const __m128i mask = _mm_set_epi32(0x0C0F0E0D, 0x080B0A09, 0x04070605, 0x00030201);
95 return _mm_shuffle_epi8(val, mask);
96}
97
98/// \brief Unpack XMM words
99/// \tparam IDX the element from each XMM word
100/// \param a the first XMM word
101/// \param b the second XMM word
102/// \param c the third XMM word
103/// \param d the fourth XMM word
104/// \details UnpackXMM selects the IDX element from a, b, c, d and returns a concatenation
105/// equivalent to <tt>a[IDX] || b[IDX] || c[IDX] || d[IDX]</tt>.
106template <unsigned int IDX>
107inline __m128i UnpackXMM(const __m128i& a, const __m128i& b, const __m128i& c, const __m128i& d)
108{
109 // Should not be instantiated
110 CRYPTOPP_UNUSED(a); CRYPTOPP_UNUSED(b);
111 CRYPTOPP_UNUSED(c); CRYPTOPP_UNUSED(d);
113 return _mm_setzero_si128();
114}
115
116template <>
117inline __m128i UnpackXMM<0>(const __m128i& a, const __m128i& b, const __m128i& c, const __m128i& d)
118{
119 const __m128i r1 = _mm_unpacklo_epi32(a, b);
120 const __m128i r2 = _mm_unpacklo_epi32(c, d);
121 return _mm_unpacklo_epi64(r1, r2);
122}
123
124template <>
125inline __m128i UnpackXMM<1>(const __m128i& a, const __m128i& b, const __m128i& c, const __m128i& d)
126{
127 const __m128i r1 = _mm_unpacklo_epi32(a, b);
128 const __m128i r2 = _mm_unpacklo_epi32(c, d);
129 return _mm_unpackhi_epi64(r1, r2);
130}
131
132template <>
133inline __m128i UnpackXMM<2>(const __m128i& a, const __m128i& b, const __m128i& c, const __m128i& d)
134{
135 const __m128i r1 = _mm_unpackhi_epi32(a, b);
136 const __m128i r2 = _mm_unpackhi_epi32(c, d);
137 return _mm_unpacklo_epi64(r1, r2);
138}
139
140template <>
141inline __m128i UnpackXMM<3>(const __m128i& a, const __m128i& b, const __m128i& c, const __m128i& d)
142{
143 const __m128i r1 = _mm_unpackhi_epi32(a, b);
144 const __m128i r2 = _mm_unpackhi_epi32(c, d);
145 return _mm_unpackhi_epi64(r1, r2);
146}
147
148/// \brief Unpack a XMM word
149/// \tparam IDX the element from each XMM word
150/// \param v the first XMM word
151/// \details UnpackXMM selects the IDX element from v and returns a concatenation
152/// equivalent to <tt>v[IDX] || v[IDX] || v[IDX] || v[IDX]</tt>.
153template <unsigned int IDX>
154inline __m128i UnpackXMM(const __m128i& v)
155{
156 // Should not be instantiated
157 CRYPTOPP_UNUSED(v); CRYPTOPP_ASSERT(0);
158 return _mm_setzero_si128();
159}
160
161template <>
162inline __m128i UnpackXMM<0>(const __m128i& v)
163{
164 // Splat to all lanes
165 return _mm_shuffle_epi8(v, _mm_set_epi8(3,2,1,0, 3,2,1,0, 3,2,1,0, 3,2,1,0));
166}
167
168template <>
169inline __m128i UnpackXMM<1>(const __m128i& v)
170{
171 // Splat to all lanes
172 return _mm_shuffle_epi8(v, _mm_set_epi8(7,6,5,4, 7,6,5,4, 7,6,5,4, 7,6,5,4));
173}
174
175template <>
176inline __m128i UnpackXMM<2>(const __m128i& v)
177{
178 // Splat to all lanes
179 return _mm_shuffle_epi8(v, _mm_set_epi8(11,10,9,8, 11,10,9,8, 11,10,9,8, 11,10,9,8));
180}
181
182template <>
183inline __m128i UnpackXMM<3>(const __m128i& v)
184{
185 // Splat to all lanes
186 return _mm_shuffle_epi8(v, _mm_set_epi8(15,14,13,12, 15,14,13,12, 15,14,13,12, 15,14,13,12));
187}
188
189template <unsigned int IDX>
190inline __m128i RepackXMM(const __m128i& a, const __m128i& b, const __m128i& c, const __m128i& d)
191{
192 return UnpackXMM<IDX>(a, b, c, d);
193}
194
195template <unsigned int IDX>
196inline __m128i RepackXMM(const __m128i& v)
197{
198 return UnpackXMM<IDX>(v);
199}
200
201inline void SM4_Encrypt(__m128i &block0, __m128i &block1,
202 __m128i &block2, __m128i &block3, const word32 *subkeys)
203{
204 // nibble mask
205 const __m128i c0f = _mm_set_epi32(0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F);
206
207 // flip all bytes in all 32-bit words
208 const __m128i flp = _mm_set_epi32(0x0C0D0E0F, 0x08090A0B, 0x04050607, 0x00010203);
209
210 // inverse shift rows
211 const __m128i shr = _mm_set_epi32(0x0306090C, 0x0F020508, 0x0B0E0104, 0x070A0D00);
212
213 // Affine transform 1 (low and high hibbles)
214 const __m128i m1l = _mm_set_epi32(0xC7C1B4B2, 0x22245157, 0x9197E2E4, 0x74720701);
215 const __m128i m1h = _mm_set_epi32(0xF052B91B, 0xF95BB012, 0xE240AB09, 0xEB49A200);
216
217 // Affine transform 2 (low and high hibbles)
218 const __m128i m2l = _mm_set_epi32(0xEDD14478, 0x172BBE82, 0x5B67F2CE, 0xA19D0834);
219 const __m128i m2h = _mm_set_epi32(0x11CDBE62, 0xCC1063BF, 0xAE7201DD, 0x73AFDC00);
220
221 __m128i t0 = UnpackXMM<0>(block0, block1, block2, block3);
222 __m128i t1 = UnpackXMM<1>(block0, block1, block2, block3);
223 __m128i t2 = UnpackXMM<2>(block0, block1, block2, block3);
224 __m128i t3 = UnpackXMM<3>(block0, block1, block2, block3);
225
226 t0 = _mm_shuffle_epi8(t0, flp);
227 t1 = _mm_shuffle_epi8(t1, flp);
228 t2 = _mm_shuffle_epi8(t2, flp);
229 t3 = _mm_shuffle_epi8(t3, flp);
230
231 const unsigned int ROUNDS = 32;
232 for (unsigned int i = 0; i < ROUNDS; i++)
233 {
234 const __m128i k = _mm_shuffle_epi32(_mm_castps_si128(
235 _mm_load_ss((const float*)(subkeys+i))), _MM_SHUFFLE(0,0,0,0));
236
237 __m128i x, y;
238 x = _mm_xor_si128(t1, _mm_xor_si128(t2, _mm_xor_si128(t3, k)));
239
240 y = _mm_and_si128(x, c0f); // inner affine
241 y = _mm_shuffle_epi8(m1l, y);
242 x = _mm_and_si128(ShiftRight64<4>(x), c0f);
243 x = _mm_xor_si128(_mm_shuffle_epi8(m1h, x), y);
244
245 x = _mm_shuffle_epi8(x, shr); // inverse MixColumns
246 x = _mm_aesenclast_si128(x, c0f); // AESNI instruction
247
248 y = _mm_andnot_si128(x, c0f); // outer affine
249 y = _mm_shuffle_epi8(m2l, y);
250 x = _mm_and_si128(ShiftRight64<4>(x), c0f);
251 x = _mm_xor_si128(_mm_shuffle_epi8(m2h, x), y);
252
253 // 4 parallel L1 linear transforms
254 y = _mm_xor_si128(x, RotateLeft<8>(x));
255 y = _mm_xor_si128(y, RotateLeft<16>(x));
256 y = _mm_xor_si128(ShiftLeft<2>(y), ShiftRight<30>(y));
257 x = _mm_xor_si128(x, _mm_xor_si128(y, RotateLeft<24>(x)));
258
259 // rotate registers
260 x = _mm_xor_si128(x, t0);
261 t0 = t1; t1 = t2;
262 t2 = t3; t3 = x;
263 }
264
265 t0 = _mm_shuffle_epi8(t0, flp);
266 t1 = _mm_shuffle_epi8(t1, flp);
267 t2 = _mm_shuffle_epi8(t2, flp);
268 t3 = _mm_shuffle_epi8(t3, flp);
269
270 block0 = RepackXMM<0>(t3,t2,t1,t0);
271 block1 = RepackXMM<1>(t3,t2,t1,t0);
272 block2 = RepackXMM<2>(t3,t2,t1,t0);
273 block3 = RepackXMM<3>(t3,t2,t1,t0);
274}
275
276inline void SM4_Enc_4_Blocks(__m128i &block0, __m128i &block1,
277 __m128i &block2, __m128i &block3, const word32 *subkeys, unsigned int /*rounds*/)
278{
279 SM4_Encrypt(block0, block1, block2, block3, subkeys);
280}
281
282inline void SM4_Dec_4_Blocks(__m128i &block0, __m128i &block1,
283 __m128i &block2, __m128i &block3, const word32 *subkeys, unsigned int /*rounds*/)
284{
285 SM4_Encrypt(block0, block1, block2, block3, subkeys);
286}
287
288inline void SM4_Enc_Block(__m128i &block0,
289 const word32 *subkeys, unsigned int /*rounds*/)
290{
291 __m128i t1 = _mm_setzero_si128();
292 __m128i t2 = _mm_setzero_si128();
293 __m128i t3 = _mm_setzero_si128();
294
295 SM4_Encrypt(block0, t1, t2, t3, subkeys);
296}
297
298inline void SM4_Dec_Block(__m128i &block0,
299 const word32 *subkeys, unsigned int /*rounds*/)
300{
301 __m128i t1 = _mm_setzero_si128();
302 __m128i t2 = _mm_setzero_si128();
303 __m128i t3 = _mm_setzero_si128();
304
305 SM4_Encrypt(block0, t1, t2, t3, subkeys);
306}
307
308#endif // CRYPTOPP_AESNI_AVAILABLE
309
310ANONYMOUS_NAMESPACE_END
311
312NAMESPACE_BEGIN(CryptoPP)
313
314#if defined(CRYPTOPP_AESNI_AVAILABLE)
315size_t SM4_Enc_AdvancedProcessBlocks_AESNI(const word32* subKeys, size_t rounds,
316 const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags)
317{
318 return AdvancedProcessBlocks128_4x1_SSE(SM4_Enc_Block, SM4_Enc_4_Blocks,
319 subKeys, rounds, inBlocks, xorBlocks, outBlocks, length, flags);
320}
321#endif // CRYPTOPP_AESNI_AVAILABLE
322
323NAMESPACE_END
Template for AdvancedProcessBlocks and SIMD processing.
size_t AdvancedProcessBlocks128_4x1_SSE(F1 func1, F4 func4, const W *subKeys, size_t rounds, const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags)
AdvancedProcessBlocks for 1 and 4 blocks.
Definition adv_simd.h:830
Library configuration file.
unsigned int word32
32-bit unsigned datatype
Definition config_int.h:72
Utility functions for the Crypto++ library.
Crypto++ library namespace.
Precompiled header file.
Classes for the SM4 block cipher.
#define CRYPTOPP_ASSERT(exp)
Debugging and diagnostic assertion.
Definition trap.h:68