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SIMD speed optimization for Kuznyechik cipher implementation (up to 2x speedup). Based on https://github.com/aprelev/libgost15.

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This commit is contained in:
Mounir IDRASSI
2017-11-27 09:10:17 +02:00
parent 685fad2d5d
commit f53eb8e260
10 changed files with 9835 additions and 168 deletions
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48
src/Volume/Cipher.cpp
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@@ -462,5 +462,53 @@ namespace VeraCrypt
{
kuznyechik_set_key (key, (kuznyechik_kds *) ScheduledKey.Ptr());
}
void CipherKuznyechik::EncryptBlocks (byte *data, size_t blockCount) const
{
if (!Initialized)
throw NotInitialized (SRC_POS);
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
if ((blockCount >= 4)
&& IsHwSupportAvailable())
{
kuznyechik_encrypt_blocks (data, data, blockCount, (kuznyechik_kds *) ScheduledKey.Ptr());
}
else
#endif
Cipher::EncryptBlocks (data, blockCount);
}
void CipherKuznyechik::DecryptBlocks (byte *data, size_t blockCount) const
{
if (!Initialized)
throw NotInitialized (SRC_POS);
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
if ((blockCount >= 4)
&& IsHwSupportAvailable())
{
kuznyechik_decrypt_blocks (data, data, blockCount, (kuznyechik_kds *) ScheduledKey.Ptr());
}
else
#endif
Cipher::DecryptBlocks (data, blockCount);
}
bool CipherKuznyechik::IsHwSupportAvailable () const
{
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
static bool state = false;
static bool stateValid = false;
if (!stateValid)
{
state = HasSSE2() ? true : false;
stateValid = true;
}
return state;
#else
return false;
#endif
}
bool Cipher::HwSupportEnabled = true;
}

2
src/Volume/Cipher.h
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@@ -104,13 +104,13 @@ namespace VeraCrypt
TC_CIPHER (Serpent, 16, 32);
TC_CIPHER (Twofish, 16, 32);
TC_CIPHER (Camellia, 16, 32);
TC_CIPHER (Kuznyechik, 16, 32);
#undef TC_CIPHER_ADD_METHODS
#define TC_CIPHER_ADD_METHODS
TC_CIPHER (Gost89, 16, 32);
TC_CIPHER (Gost89StaticSBOX, 16, 32);
TC_CIPHER (Kuznyechik, 16, 32);
#undef TC_CIPHER

1
src/Volume/Volume.make
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@@ -79,6 +79,7 @@ OBJS += ../Crypto/Camellia.o
OBJS += ../Crypto/GostCipher.o
OBJS += ../Crypto/Streebog.o
OBJS += ../Crypto/kuznyechik.o
OBJS += ../Crypto/kuznyechik_simd.o
OBJS += ../Common/Crc.o
OBJS += ../Common/Endian.o