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Avoid extra memcpy in Poly1305 Resynchronize

pull/795/head
Jeffrey Walton 2019-01-27 09:08:02 -05:00
parent d2c030638d
commit f78a5b2eb8
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GPG Key ID: B36AB348921B1838
1 changed files with 3 additions and 4 deletions
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7
poly1305.cpp
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@ -230,8 +230,7 @@ void Poly1305_Base<T>::Update(const byte *input, size_t length)
// Process
memcpy_s(m_acc + num, BLOCKSIZE - num, input, rem);
Poly1305_HashBlocks(m_h, m_r, m_acc, BLOCKSIZE, 1);
input += rem;
length -= rem;
input += rem; length -= rem;
}
else
{
@ -286,8 +285,8 @@ void Poly1305_Base<T>::Resynchronize(const byte *nonce, int nonceLength)
CRYPTOPP_ASSERT(nonceLength == -1 || nonceLength == (int)BLOCKSIZE);
nonceLength == -1 ? nonceLength = BLOCKSIZE : nonceLength;
std::memcpy(m_nk.begin(), nonce, nonceLength);
m_cipher.ProcessBlock(m_nk.begin());
// Encrypt the nonce, stash in m_nk
m_cipher.ProcessBlock(nonce, m_nk.begin());
m_n[0] = GetWord<word32>(false, LITTLE_ENDIAN_ORDER, m_nk + 0);
m_n[1] = GetWord<word32>(false, LITTLE_ENDIAN_ORDER, m_nk + 4);