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Use local definition of space

pull/769/head
Jeffrey Walton 2018-12-27 13:56:03 -05:00
parent e8025bf6a9
commit b877782692
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GPG Key ID: B36AB348921B1838
1 changed files with 4 additions and 7 deletions
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11
filters.cpp
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@ -694,9 +694,6 @@ void StreamTransformationFilter::NextPutModifiable(byte *inString, size_t length
void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
{
byte *space = NULLPTR;
#if 1
// This block is new to StreamTransformationFilter. It somewhat of a hack and was added
// for OCB mode; see GitHub Issue 515. The rub with OCB is, its a block cipher and the
// last block size can be 0. However, "last block = 0" is not the 0 predacted in the
@ -719,7 +716,7 @@ void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
if (m_isSpecial)
{
const size_t leftOver = length % m_mandatoryBlockSize;
space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, m_reservedBufferSize);
byte* space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, m_reservedBufferSize);
length -= leftOver;
if (length)
@ -745,7 +742,6 @@ void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
return;
}
#endif
switch (m_padding)
{
@ -760,7 +756,7 @@ void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
{
// do padding
size_t blockSize = STDMAX(minLastBlockSize, (size_t)m_mandatoryBlockSize);
space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, blockSize);
byte* space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, blockSize);
if (inString) {memcpy(space, inString, length);}
memset(PtrAdd(space, length), 0, blockSize - length);
size_t used = m_cipher.ProcessLastBlock(space, blockSize, space, blockSize);
@ -776,7 +772,7 @@ void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
throw InvalidCiphertext("StreamTransformationFilter: ciphertext length is not a multiple of block size");
}
space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, length, m_optimalBufferSize);
byte* space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, length, m_optimalBufferSize);
size_t used = m_cipher.ProcessLastBlock(space, length, inString, length);
AttachedTransformation()->Put(space, used);
}
@ -787,6 +783,7 @@ void StreamTransformationFilter::LastPut(const byte *inString, size_t length)
case W3C_PADDING:
case ONE_AND_ZEROS_PADDING:
unsigned int s;
byte* space;
s = m_mandatoryBlockSize;
CRYPTOPP_ASSERT(s > 1);
space = HelpCreatePutSpace(*AttachedTransformation(), DEFAULT_CHANNEL, s, m_optimalBufferSize);