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1 | | // sm4.cpp - written and placed in the public domain by Jeffrey Walton and Han Lulu |
2 | | // |
3 | | // We understand future ARMv8 enhancements are supposed |
4 | | // to include SM3 and SM4 related instructions so the function |
5 | | // is stubbed for an eventual SM4_Round_ARMV8. |
6 | | |
7 | | #include "pch.h" |
8 | | #include "config.h" |
9 | | |
10 | | #include "sm4.h" |
11 | | #include "misc.h" |
12 | | #include "cpu.h" |
13 | | |
14 | | #if CRYPTOPP_MSC_VERSION |
15 | | # pragma warning(disable: 4307) |
16 | | #endif |
17 | | |
18 | | ANONYMOUS_NAMESPACE_BEGIN |
19 | | |
20 | | using CryptoPP::byte; |
21 | | using CryptoPP::word32; |
22 | | using CryptoPP::rotlConstant; |
23 | | |
24 | | CRYPTOPP_ALIGN_DATA(4) |
25 | | const byte S[256] = |
26 | | { |
27 | | 0xD6, 0x90, 0xE9, 0xFE, 0xCC, 0xE1, 0x3D, 0xB7, 0x16, 0xB6, 0x14, 0xC2, 0x28, 0xFB, 0x2C, 0x05, |
28 | | 0x2B, 0x67, 0x9A, 0x76, 0x2A, 0xBE, 0x04, 0xC3, 0xAA, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, |
29 | | 0x9C, 0x42, 0x50, 0xF4, 0x91, 0xEF, 0x98, 0x7A, 0x33, 0x54, 0x0B, 0x43, 0xED, 0xCF, 0xAC, 0x62, |
30 | | 0xE4, 0xB3, 0x1C, 0xA9, 0xC9, 0x08, 0xE8, 0x95, 0x80, 0xDF, 0x94, 0xFA, 0x75, 0x8F, 0x3F, 0xA6, |
31 | | 0x47, 0x07, 0xA7, 0xFC, 0xF3, 0x73, 0x17, 0xBA, 0x83, 0x59, 0x3C, 0x19, 0xE6, 0x85, 0x4F, 0xA8, |
32 | | 0x68, 0x6B, 0x81, 0xB2, 0x71, 0x64, 0xDA, 0x8B, 0xF8, 0xEB, 0x0F, 0x4B, 0x70, 0x56, 0x9D, 0x35, |
33 | | 0x1E, 0x24, 0x0E, 0x5E, 0x63, 0x58, 0xD1, 0xA2, 0x25, 0x22, 0x7C, 0x3B, 0x01, 0x21, 0x78, 0x87, |
34 | | 0xD4, 0x00, 0x46, 0x57, 0x9F, 0xD3, 0x27, 0x52, 0x4C, 0x36, 0x02, 0xE7, 0xA0, 0xC4, 0xC8, 0x9E, |
35 | | 0xEA, 0xBF, 0x8A, 0xD2, 0x40, 0xC7, 0x38, 0xB5, 0xA3, 0xF7, 0xF2, 0xCE, 0xF9, 0x61, 0x15, 0xA1, |
36 | | 0xE0, 0xAE, 0x5D, 0xA4, 0x9B, 0x34, 0x1A, 0x55, 0xAD, 0x93, 0x32, 0x30, 0xF5, 0x8C, 0xB1, 0xE3, |
37 | | 0x1D, 0xF6, 0xE2, 0x2E, 0x82, 0x66, 0xCA, 0x60, 0xC0, 0x29, 0x23, 0xAB, 0x0D, 0x53, 0x4E, 0x6F, |
38 | | 0xD5, 0xDB, 0x37, 0x45, 0xDE, 0xFD, 0x8E, 0x2F, 0x03, 0xFF, 0x6A, 0x72, 0x6D, 0x6C, 0x5B, 0x51, |
39 | | 0x8D, 0x1B, 0xAF, 0x92, 0xBB, 0xDD, 0xBC, 0x7F, 0x11, 0xD9, 0x5C, 0x41, 0x1F, 0x10, 0x5A, 0xD8, |
40 | | 0x0A, 0xC1, 0x31, 0x88, 0xA5, 0xCD, 0x7B, 0xBD, 0x2D, 0x74, 0xD0, 0x12, 0xB8, 0xE5, 0xB4, 0xB0, |
41 | | 0x89, 0x69, 0x97, 0x4A, 0x0C, 0x96, 0x77, 0x7E, 0x65, 0xB9, 0xF1, 0x09, 0xC5, 0x6E, 0xC6, 0x84, |
42 | | 0x18, 0xF0, 0x7D, 0xEC, 0x3A, 0xDC, 0x4D, 0x20, 0x79, 0xEE, 0x5F, 0x3E, 0xD7, 0xCB, 0x39, 0x48 |
43 | | }; |
44 | | |
45 | | const word32 CK[32] = |
46 | | { |
47 | | 0x00070E15, 0x1C232A31, 0x383F464D, 0x545B6269, |
48 | | 0x70777E85, 0x8C939AA1, 0xA8AFB6BD, 0xC4CBD2D9, |
49 | | 0xE0E7EEF5, 0xFC030A11, 0x181F262D, 0x343B4249, |
50 | | 0x50575E65, 0x6C737A81, 0x888F969D, 0xA4ABB2B9, |
51 | | 0xC0C7CED5, 0xDCE3EAF1, 0xF8FF060D, 0x141B2229, |
52 | | 0x30373E45, 0x4C535A61, 0x686F767D, 0x848B9299, |
53 | | 0xA0A7AEB5, 0xBCC3CAD1, 0xD8DFE6ED, 0xF4FB0209, |
54 | | 0x10171E25, 0x2C333A41, 0x484F565D, 0x646B7279 |
55 | | }; |
56 | | |
57 | | inline word32 SM4_H(word32 x) |
58 | 128 | { |
59 | 128 | return (S[GETBYTE(x, 3)] << 24) | (S[GETBYTE(x, 2)] << 16) | (S[GETBYTE(x, 1)] << 8) | (S[GETBYTE(x, 0)]); |
60 | 128 | } |
61 | | |
62 | | inline word32 SM4_G(word32 x) |
63 | 96 | { |
64 | 96 | const word32 t = SM4_H(x); |
65 | 96 | return t ^ rotlConstant<13>(t) ^ rotlConstant<23>(t); |
66 | 96 | } |
67 | | |
68 | | inline word32 SM4_F(word32 x) |
69 | 32 | { |
70 | 32 | const word32 t = SM4_H(x); |
71 | 32 | return t ^ rotlConstant<2>(t) ^ rotlConstant<10>(t) ^ rotlConstant<18>(t) ^ rotlConstant<24>(t); |
72 | 32 | } |
73 | | |
74 | | template <unsigned int R, bool FWD> |
75 | | inline void SM4_Round(word32 wspace[4], const word32 rkeys[32]) |
76 | 8 | { |
77 | 8 | if (FWD) |
78 | 0 | { |
79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); |
80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); |
81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); |
82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); |
83 | 0 | } |
84 | 8 | else |
85 | 8 | { |
86 | 8 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); |
87 | 8 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); |
88 | 8 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); |
89 | 8 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); |
90 | 8 | } |
91 | 8 | } Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<0u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<4u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<8u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<12u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<16u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<20u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<24u, true>(unsigned int*, unsigned int const*) Unexecuted instantiation: sm4.cpp:void (anonymous namespace)::SM4_Round<28u, true>(unsigned int*, unsigned int const*) sm4.cpp:void (anonymous namespace)::SM4_Round<31u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<27u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<23u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<19u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<15u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<11u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<7u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
sm4.cpp:void (anonymous namespace)::SM4_Round<3u, false>(unsigned int*, unsigned int const*) Line | Count | Source | 76 | 1 | { | 77 | 1 | if (FWD) | 78 | 0 | { | 79 | 0 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R+0]); | 80 | 0 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R+1]); | 81 | 0 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R+2]); | 82 | 0 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R+3]); | 83 | 0 | } | 84 | 1 | else | 85 | 1 | { | 86 | 1 | wspace[0] ^= SM4_F(wspace[1] ^ wspace[2] ^ wspace[3] ^ rkeys[R-0]); | 87 | 1 | wspace[1] ^= SM4_F(wspace[0] ^ wspace[2] ^ wspace[3] ^ rkeys[R-1]); | 88 | 1 | wspace[2] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[3] ^ rkeys[R-2]); | 89 | 1 | wspace[3] ^= SM4_F(wspace[0] ^ wspace[1] ^ wspace[2] ^ rkeys[R-3]); | 90 | 1 | } | 91 | 1 | } |
|
92 | | |
93 | | ANONYMOUS_NAMESPACE_END |
94 | | |
95 | | NAMESPACE_BEGIN(CryptoPP) |
96 | | |
97 | | #if CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS |
98 | | # if defined(CRYPTOPP_AESNI_AVAILABLE) |
99 | | extern size_t SM4_Enc_AdvancedProcessBlocks_AESNI(const word32* subKeys, size_t rounds, |
100 | | const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags); |
101 | | # endif |
102 | | #endif |
103 | | |
104 | | std::string SM4::Enc::AlgorithmProvider() const |
105 | 0 | { |
106 | 0 | #if defined(CRYPTOPP_AESNI_AVAILABLE) |
107 | 0 | if (HasAESNI()) |
108 | 0 | return "AESNI"; |
109 | 0 | #endif |
110 | 0 | return "C++"; |
111 | 0 | } |
112 | | |
113 | | void SM4::Base::UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms) |
114 | 3 | { |
115 | 3 | CRYPTOPP_ASSERT(keyLength == 16); |
116 | 3 | CRYPTOPP_UNUSED(params); |
117 | | |
118 | 3 | m_rkeys.New(32); |
119 | 3 | m_wspace.New(5); |
120 | | |
121 | 3 | GetUserKey(BIG_ENDIAN_ORDER, m_wspace.begin(), 4, userKey, keyLength); |
122 | 3 | m_wspace[0] ^= 0xa3b1bac6; m_wspace[1] ^= 0x56aa3350; |
123 | 3 | m_wspace[2] ^= 0x677d9197; m_wspace[3] ^= 0xb27022dc; |
124 | | |
125 | 3 | size_t i=0; |
126 | 3 | do |
127 | 24 | { |
128 | 24 | m_rkeys[i] = (m_wspace[0] ^= SM4_G(m_wspace[1] ^ m_wspace[2] ^ m_wspace[3] ^ CK[i])); i++; |
129 | 24 | m_rkeys[i] = (m_wspace[1] ^= SM4_G(m_wspace[2] ^ m_wspace[3] ^ m_wspace[0] ^ CK[i])); i++; |
130 | 24 | m_rkeys[i] = (m_wspace[2] ^= SM4_G(m_wspace[3] ^ m_wspace[0] ^ m_wspace[1] ^ CK[i])); i++; |
131 | 24 | m_rkeys[i] = (m_wspace[3] ^= SM4_G(m_wspace[0] ^ m_wspace[1] ^ m_wspace[2] ^ CK[i])); i++; |
132 | 24 | } |
133 | 24 | while (i < 32); |
134 | 3 | } |
135 | | |
136 | | void SM4::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const |
137 | 0 | { |
138 | | // Reverse bytes on LittleEndian; align pointer on BigEndian |
139 | 0 | typedef GetBlock<word32, BigEndian, false> InBlock; |
140 | 0 | InBlock iblk(inBlock); iblk(m_wspace[0])(m_wspace[1])(m_wspace[2])(m_wspace[3]); |
141 | | |
142 | | // Timing attack countermeasure, see comments in Rijndael for more details. |
143 | | // The hardening does not materially affect benchmarks. SM4 runs at |
144 | | // 30.5 cpb on a Core i5 Skylake with and without the code below. |
145 | 0 | const int cacheLineSize = GetCacheLineSize(); |
146 | 0 | volatile word32 _u = 0; |
147 | 0 | word32 u = _u; |
148 | |
|
149 | 0 | for (unsigned int i=0; i<sizeof(S); i+=cacheLineSize) |
150 | 0 | u |= *(const word32 *)(void*)(S+i); |
151 | 0 | m_wspace[4] = u; |
152 | |
|
153 | 0 | SM4_Round< 0, true>(m_wspace, m_rkeys); |
154 | 0 | SM4_Round< 4, true>(m_wspace, m_rkeys); |
155 | 0 | SM4_Round< 8, true>(m_wspace, m_rkeys); |
156 | 0 | SM4_Round<12, true>(m_wspace, m_rkeys); |
157 | 0 | SM4_Round<16, true>(m_wspace, m_rkeys); |
158 | 0 | SM4_Round<20, true>(m_wspace, m_rkeys); |
159 | 0 | SM4_Round<24, true>(m_wspace, m_rkeys); |
160 | 0 | SM4_Round<28, true>(m_wspace, m_rkeys); |
161 | | |
162 | | // Reverse bytes on LittleEndian; align pointer on BigEndian |
163 | 0 | typedef PutBlock<word32, BigEndian, false> OutBlock; |
164 | 0 | OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2])(m_wspace[1])(m_wspace[0]); |
165 | 0 | } |
166 | | |
167 | | void SM4::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const |
168 | 1 | { |
169 | | // Reverse bytes on LittleEndian; align pointer on BigEndian |
170 | 1 | typedef GetBlock<word32, BigEndian, false> InBlock; |
171 | 1 | InBlock iblk(inBlock); iblk(m_wspace[0])(m_wspace[1])(m_wspace[2])(m_wspace[3]); |
172 | | |
173 | | // Timing attack countermeasure, see comments in Rijndael for more details. |
174 | | // The hardening does not materially affect benchmarks. SM4 runs at |
175 | | // 30.5 cpb on a Core i5 Skylake with and without the code below. |
176 | 1 | const int cacheLineSize = GetCacheLineSize(); |
177 | 1 | volatile word32 _u = 0; |
178 | 1 | word32 u = _u; |
179 | | |
180 | 5 | for (unsigned int i=0; i<sizeof(S); i+=cacheLineSize) |
181 | 4 | u |= *(const word32 *)(void*)(S+i); |
182 | 1 | m_wspace[4] = u; |
183 | | |
184 | 1 | SM4_Round<31, false>(m_wspace, m_rkeys); |
185 | 1 | SM4_Round<27, false>(m_wspace, m_rkeys); |
186 | 1 | SM4_Round<23, false>(m_wspace, m_rkeys); |
187 | 1 | SM4_Round<19, false>(m_wspace, m_rkeys); |
188 | 1 | SM4_Round<15, false>(m_wspace, m_rkeys); |
189 | 1 | SM4_Round<11, false>(m_wspace, m_rkeys); |
190 | 1 | SM4_Round< 7, false>(m_wspace, m_rkeys); |
191 | 1 | SM4_Round< 3, false>(m_wspace, m_rkeys); |
192 | | |
193 | | // Reverse bytes on LittleEndian; align pointer on BigEndian |
194 | 1 | typedef PutBlock<word32, BigEndian, false> OutBlock; |
195 | 1 | OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2])(m_wspace[1])(m_wspace[0]); |
196 | 1 | } |
197 | | |
198 | | #if CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS |
199 | | size_t SM4::Enc::AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, |
200 | | byte *outBlocks, size_t length, word32 flags) const |
201 | 8 | { |
202 | 8 | #if defined(CRYPTOPP_AESNI_AVAILABLE) |
203 | 8 | if (HasAESNI()) { |
204 | 8 | return SM4_Enc_AdvancedProcessBlocks_AESNI(m_rkeys, 32, |
205 | 8 | inBlocks, xorBlocks, outBlocks, length, flags); |
206 | 8 | } |
207 | 0 | #endif |
208 | 0 | return BlockTransformation::AdvancedProcessBlocks(inBlocks, xorBlocks, outBlocks, length, flags); |
209 | 8 | } |
210 | | #endif // CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS |
211 | | |
212 | | NAMESPACE_END |