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Cleanup Panama cihers

pull/762/head
Jeffrey Walton 2018-12-07 01:46:49 -05:00
parent 08aa7724cd
commit 52035583de
No known key found for this signature in database
GPG Key ID: B36AB348921B1838
2 changed files with 19 additions and 16 deletions
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27
panama.cpp
View File

@ -89,8 +89,7 @@ void CRYPTOPP_NOINLINE Panama_SSE2_Pull(size_t count, word32 *state, word32 *z,
AS2( mov REG_loopEnd, AS_REG_1)
#else
AS_PUSH_IF86( bp)
// AS1( push AS_REG_1) // AS_REG_1 is defined as ecx uner X86 and X32 (see cpu.h)
AS_PUSH_IF86( cx)
AS1( push AS_REG_1)
#endif
AS2( movdqa xmm0, XMMWORD_PTR [AS_REG_2+0*16])
@ -336,7 +335,6 @@ void CRYPTOPP_NOINLINE Panama_SSE2_Pull(size_t count, word32 *state, word32 *z,
template <class B>
void Panama<B>::Iterate(size_t count, const word32 *p, byte *output, const byte *input, KeystreamOperation operation)
{
CRYPTOPP_ASSERT(IsAlignedOn(m_state,GetAlignmentOf<word32>()));
word32 bstart = m_state[17];
word32 *const aPtr = m_state;
word32 cPtr[17];
@ -344,7 +342,7 @@ void Panama<B>::Iterate(size_t count, const word32 *p, byte *output, const byte
#define bPtr ((byte *)(aPtr+20))
// reorder the state for SSE2
// a and c: 4 8 12 16 | 3 7 11 15 | 2 6 10 14 | 1 5 9 13 | 0
// a and c: 4 8 12 16 | 3 7 11 15 | 2 6 10 14 | 1 5 9 13 | 0 |
// xmm0 xmm1 xmm2 xmm3 eax
#define a(i) aPtr[((i)*13+16) % 17] // 13 is inverse of 4 mod 17
#define c(i) cPtr[((i)*13+16) % 17]
@ -445,14 +443,13 @@ void PanamaHash<B>::TruncatedFinal(byte *hash, size_t size)
this->PadLastBlock(this->BLOCKSIZE, 0x01);
HashEndianCorrectedBlock(this->m_data);
this->HashEndianCorrectedBlock(this->m_data);
this->Iterate(32); // pull
FixedSizeSecBlock<word32, 8> buf;
this->Iterate(1, NULLPTR, buf.BytePtr(), NULLPTR);
this->Iterate(1, NULLPTR, m_buf.BytePtr(), NULLPTR);
memcpy(hash, buf, size);
memcpy(hash, m_buf, size);
this->Restart(); // reinit for next use
}
@ -469,8 +466,8 @@ void PanamaCipherPolicy<B>::CipherSetKey(const NameValuePairs &params, const byt
template <class B>
void PanamaCipherPolicy<B>::CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length)
{
CRYPTOPP_UNUSED(keystreamBuffer); CRYPTOPP_UNUSED(iv); CRYPTOPP_UNUSED(length);
CRYPTOPP_ASSERT(length==32);
CRYPTOPP_UNUSED(keystreamBuffer); CRYPTOPP_UNUSED(iv);
CRYPTOPP_UNUSED(length); CRYPTOPP_ASSERT(length==32);
this->Reset();
this->Iterate(1, m_key);
@ -478,12 +475,11 @@ void PanamaCipherPolicy<B>::CipherResynchronize(byte *keystreamBuffer, const byt
this->Iterate(1, reinterpret_cast<const word32*>(iv));
else
{
FixedSizeSecBlock<word32, 8> buf;
if (iv)
memcpy(buf, iv, 32);
memcpy(m_buf, iv, 32);
else
memset(buf, 0, 32);
this->Iterate(1, buf);
memset(m_buf, 0, 32);
this->Iterate(1, m_buf);
}
#if (CRYPTOPP_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE)) && !defined(CRYPTOPP_DISABLE_PANAMA_ASM)
@ -516,7 +512,8 @@ void PanamaCipherPolicy<B>::OperateKeystream(KeystreamOperation operation, byte
{
#if (CRYPTOPP_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE)) && !defined(CRYPTOPP_DISABLE_PANAMA_ASM)
if (B::ToEnum() == LITTLE_ENDIAN_ORDER && HasSSE2())
Panama_SSE2_Pull(iterationCount, this->m_state, (word32 *)(void *)output, (const word32 *)(void *)input);
Panama_SSE2_Pull(iterationCount, this->m_state,
reinterpret_cast<word32*>(output), reinterpret_cast<const word32*>(input));
else
#endif
this->Iterate(iterationCount, NULLPTR, output, input, operation);

6
panama.h
View File

@ -25,6 +25,7 @@ template <class B>
class CRYPTOPP_NO_VTABLE Panama
{
public:
virtual ~Panama() {}
std::string AlgorithmProvider() const;
void Reset();
void Iterate(size_t count, const word32 *p=NULLPTR, byte *output=NULLPTR, const byte *input=NULLPTR, KeystreamOperation operation=WRITE_KEYSTREAM);
@ -44,6 +45,7 @@ class PanamaHash : protected Panama<B>, public AlgorithmImpl<IteratedHash<word32
{
public:
CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
virtual ~PanamaHash() {}
PanamaHash() {Panama<B>::Reset();}
unsigned int DigestSize() const {return DIGESTSIZE;}
void TruncatedFinal(byte *hash, size_t size);
@ -54,6 +56,8 @@ protected:
void HashEndianCorrectedBlock(const word32 *data) {this->Iterate(1, data);} // push
size_t HashMultipleBlocks(const word32 *input, size_t length);
word32* StateBuf() {return NULLPTR;}
FixedSizeSecBlock<word32, 8> m_buf;
};
}
@ -138,6 +142,7 @@ class PanamaCipherPolicy : public AdditiveCipherConcretePolicy<word32, 8>,
protected Panama<B>
{
protected:
virtual ~PanamaCipherPolicy() {}
std::string AlgorithmProvider() const;
void CipherSetKey(const NameValuePairs &params, const byte *key, size_t length);
void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
@ -146,6 +151,7 @@ protected:
unsigned int GetAlignment() const;
FixedSizeSecBlock<word32, 8> m_key;
FixedSizeSecBlock<word32, 8> m_buf;
};
/// \brief Panama stream cipher