Crypto++ 8.1 Free C++ class library of cryptographic schemes

shacal2_simd.cpp
1 // shacla2-simd.cpp - written and placed in the public domain by
2 // Jeffrey Walton and Jack Lloyd
3 //
4 // Jack Lloyd and the Botan team allowed Crypto++ to use parts of
5 // Botan's implementation under the same license as Crypto++
6 // is released. The code for SHACAL2_Enc_ProcessAndXorBlock_SHANI
7 // below is Botan's x86_encrypt_blocks with minor tweaks. Many thanks
8 // to the Botan team. Also see http://github.com/randombit/botan/.
9 //
10 // This source file uses intrinsics to gain access to SHA-NI and
11 // ARMv8a SHA instructions. A separate source file is needed because
12 // additional CXXFLAGS are required to enable the appropriate instruction
13 // sets in some build configurations.
14
15 #include "pch.h"
16 #include "config.h"
17 #include "sha.h"
18 #include "misc.h"
19
20 #if (CRYPTOPP_SHANI_AVAILABLE)
21 # include <nmmintrin.h>
22 # include <immintrin.h>
23 #endif
24
25 // Clang __m128i casts, http://bugs.llvm.org/show_bug.cgi?id=20670
26 #define M128_CAST(x) ((__m128i *)(void *)(x))
27 #define CONST_M128_CAST(x) ((const __m128i *)(const void *)(x))
28
29 // Squash MS LNK4221 and libtool warnings
30 extern const char SHACAL2_SIMD_FNAME[] = __FILE__;
31
32 NAMESPACE_BEGIN(CryptoPP)
33
34 #if CRYPTOPP_SHANI_AVAILABLE
35 void SHACAL2_Enc_ProcessAndXorBlock_SHANI(const word32* subKeys, const byte *inBlock, const byte *xorBlock, byte *outBlock)
36 {
37 CRYPTOPP_ASSERT(subKeys);
38 CRYPTOPP_ASSERT(inBlock);
39 CRYPTOPP_ASSERT(outBlock);
40
41 const __m128i MASK1 = _mm_set_epi8(8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7);
42 const __m128i MASK2 = _mm_set_epi8(0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15);
43
44 __m128i B0 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 0)), MASK1);
45 __m128i B1 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 16)), MASK2);
46
47 __m128i TMP = _mm_alignr_epi8(B0, B1, 8);
48 B1 = _mm_blend_epi16(B1, B0, 0xF0);
49 B0 = TMP;
50
51 #if 0
52 // SSE2 + SSSE3, but 0.2 cpb slower on a Celeraon J3455
53 const __m128i MASK1 = _mm_set_epi8(8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7);
54 const __m128i MASK2 = _mm_set_epi8(0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15);
55
56 __m128i B0 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 0));
57 __m128i B1 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 16));
58
59 __m128i TMP = _mm_shuffle_epi8(_mm_unpacklo_epi64(B0, B1), MASK2);
60 B1 = _mm_shuffle_epi8(_mm_unpackhi_epi64(B0, B1), MASK2);
61 B0 = TMP;
62 #endif
63
64 const byte* keys = reinterpret_cast<const byte*>(subKeys);
65 for (size_t i = 0; i != 8; ++i)
66 {
67 const __m128i RK0 = _mm_load_si128(CONST_M128_CAST(keys + 32*i));
68 const __m128i RK2 = _mm_load_si128(CONST_M128_CAST(keys + 32*i+16));
69 const __m128i RK1 = _mm_srli_si128(RK0, 8);
70 const __m128i RK3 = _mm_srli_si128(RK2, 8);
71
72 B1 = _mm_sha256rnds2_epu32(B1, B0, RK0);
73 B0 = _mm_sha256rnds2_epu32(B0, B1, RK1);
74 B1 = _mm_sha256rnds2_epu32(B1, B0, RK2);
75 B0 = _mm_sha256rnds2_epu32(B0, B1, RK3);
76 }
77
78 TMP = _mm_shuffle_epi8(_mm_unpackhi_epi64(B0, B1), MASK1);
79 B1 = _mm_shuffle_epi8(_mm_unpacklo_epi64(B0, B1), MASK1);
80 B0 = TMP;
81
82 if (xorBlock)
83 {
84 _mm_storeu_si128(M128_CAST(outBlock + 0),
85 _mm_xor_si128(B0, _mm_loadu_si128(CONST_M128_CAST(xorBlock + 0))));
86
87 _mm_storeu_si128(M128_CAST(outBlock + 16),
88 _mm_xor_si128(B1, _mm_loadu_si128(CONST_M128_CAST(xorBlock + 16))));
89 }
90 else
91 {
92 _mm_storeu_si128(M128_CAST(outBlock + 0), B0);
93 _mm_storeu_si128(M128_CAST(outBlock + 16), B1);
94 }
95 }
96 #endif
97
98 NAMESPACE_END
misc.h
Utility functions for the Crypto++ library.
config.h
Library configuration file.
pch.h
Precompiled header file.
CRYPTOPP_ASSERT
#define CRYPTOPP_ASSERT(exp)
Debugging and diagnostic assertion.
Definition: trap.h:69
sha.h
Classes for SHA-1 and SHA-2 family of message digests.
CryptoPP
Crypto++ library namespace.