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sha2: use constexpr for static numeric arrays

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This commit is contained in:
Danny Robson 2017-01-27 14:59:59 +11:00
parent 0c4fe21f97
commit 4a73c1761b
1 changed files with 24 additions and 10 deletions
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34
hash/sha2.cpp
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@ -28,7 +28,7 @@ using namespace util::hash;
// First 32 bits of the fractional parts // First 32 bits of the fractional parts
// of the cube roots // of the cube roots
// of the first 64 prime numbers // of the first 64 prime numbers
static const static constexpr
uint32_t K_64[] = { uint32_t K_64[] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
@ -44,7 +44,7 @@ uint32_t K_64[] = {
// First 64 bits of the fractional parts // First 64 bits of the fractional parts
// of the cube roots // of the cube roots
// of the first 80 prime numbers // of the first 80 prime numbers
static const static constexpr
uint64_t K_80[] = { uint64_t K_80[] = {
0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, 0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc,
0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0x3956c25bf348b538, 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118,
@ -111,9 +111,11 @@ FUNC(s1, 17, 19, 10)
#undef FUNC #undef FUNC
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
static const static constexpr
uint32_t H_224[] = { uint32_t
H_224[] = {
0xc1059ed8, 0xc1059ed8,
0x367cd507, 0x367cd507,
0x3070dd17, 0x3070dd17,
@ -125,8 +127,10 @@ uint32_t H_224[] = {
}; };
static const //-----------------------------------------------------------------------------
uint32_t H_256[] = { static constexpr
uint32_t
H_256[] = {
0x6a09e667, 0x6a09e667,
0xbb67ae85, 0xbb67ae85,
0x3c6ef372, 0x3c6ef372,
@ -138,8 +142,10 @@ uint32_t H_256[] = {
}; };
static const //-----------------------------------------------------------------------------
uint64_t H_384[] = { static constexpr
uint64_t
H_384[] = {
0xcbbb9d5dc1059ed8, 0xcbbb9d5dc1059ed8,
0x629a292a367cd507, 0x629a292a367cd507,
0x9159015a3070dd17, 0x9159015a3070dd17,
@ -151,8 +157,10 @@ uint64_t H_384[] = {
}; };
static const //-----------------------------------------------------------------------------
uint64_t H_512[] = { static constexpr
uint64_t
H_512[] = {
0x6a09e667f3bcc908, 0x6a09e667f3bcc908,
0xbb67ae8584caa73b, 0xbb67ae8584caa73b,
0x3c6ef372fe94f82b, 0x3c6ef372fe94f82b,
@ -163,10 +171,16 @@ uint64_t H_512[] = {
0x5be0cd19137e2179, 0x5be0cd19137e2179,
}; };
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
SHA256::SHA256 (): SHA256::SHA256 ():
m_total (0) m_total (0)
{ {
(void)K_80;
(void)H_224;
(void)H_384;
(void)H_512;
std::copy (std::begin (H_256), std::end (H_256), std::begin (H)); std::copy (std::begin (H_256), std::end (H_256), std::begin (H));
} }