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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:21:13 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:21:13 +0100
commit3438e5d3ddf8444f0e31009ffbe8237ef3752c22 (patch)
tree7c2f76d5e9281c130e60fb932c4dda89a49863b6 /CryptoPP/cmac.cpp
parentMoved source to src (diff)
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Diffstat (limited to 'CryptoPP/cmac.cpp')
-rw-r--r--CryptoPP/cmac.cpp122
1 files changed, 0 insertions, 122 deletions
diff --git a/CryptoPP/cmac.cpp b/CryptoPP/cmac.cpp
deleted file mode 100644
index a31d5f8b0..000000000
--- a/CryptoPP/cmac.cpp
+++ /dev/null
@@ -1,122 +0,0 @@
-// cmac.cpp - written and placed in the public domain by Wei Dai
-
-#include "pch.h"
-
-#ifndef CRYPTOPP_IMPORTS
-
-#include "cmac.h"
-
-NAMESPACE_BEGIN(CryptoPP)
-
-static void MulU(byte *k, unsigned int length)
-{
- byte carry = 0;
-
- for (int i=length-1; i>=1; i-=2)
- {
- byte carry2 = k[i] >> 7;
- k[i] += k[i] + carry;
- carry = k[i-1] >> 7;
- k[i-1] += k[i-1] + carry2;
- }
-
- if (carry)
- {
- switch (length)
- {
- case 8:
- k[7] ^= 0x1b;
- break;
- case 16:
- k[15] ^= 0x87;
- break;
- case 32:
- k[30] ^= 4;
- k[31] ^= 0x23;
- break;
- default:
- throw InvalidArgument("CMAC: " + IntToString(length) + " is not a supported cipher block size");
- }
- }
-}
-
-void CMAC_Base::UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params)
-{
- BlockCipher &cipher = AccessCipher();
- unsigned int blockSize = cipher.BlockSize();
-
- cipher.SetKey(key, length, params);
- m_reg.CleanNew(3*blockSize);
- m_counter = 0;
-
- cipher.ProcessBlock(m_reg, m_reg+blockSize);
- MulU(m_reg+blockSize, blockSize);
- memcpy(m_reg+2*blockSize, m_reg+blockSize, blockSize);
- MulU(m_reg+2*blockSize, blockSize);
-}
-
-void CMAC_Base::Update(const byte *input, size_t length)
-{
- if (!length)
- return;
-
- BlockCipher &cipher = AccessCipher();
- unsigned int blockSize = cipher.BlockSize();
-
- if (m_counter > 0)
- {
- unsigned int len = UnsignedMin(blockSize - m_counter, length);
- xorbuf(m_reg+m_counter, input, len);
- length -= len;
- input += len;
- m_counter += len;
-
- if (m_counter == blockSize && length > 0)
- {
- cipher.ProcessBlock(m_reg);
- m_counter = 0;
- }
- }
-
- if (length > blockSize)
- {
- assert(m_counter == 0);
- size_t leftOver = 1 + cipher.AdvancedProcessBlocks(m_reg, input, m_reg, length-1, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);
- input += (length - leftOver);
- length = leftOver;
- }
-
- if (length > 0)
- {
- assert(m_counter + length <= blockSize);
- xorbuf(m_reg+m_counter, input, length);
- m_counter += (unsigned int)length;
- }
-
- assert(m_counter > 0);
-}
-
-void CMAC_Base::TruncatedFinal(byte *mac, size_t size)
-{
- ThrowIfInvalidTruncatedSize(size);
-
- BlockCipher &cipher = AccessCipher();
- unsigned int blockSize = cipher.BlockSize();
-
- if (m_counter < blockSize)
- {
- m_reg[m_counter] ^= 0x80;
- cipher.AdvancedProcessBlocks(m_reg, m_reg+2*blockSize, m_reg, blockSize, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);
- }
- else
- cipher.AdvancedProcessBlocks(m_reg, m_reg+blockSize, m_reg, blockSize, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput);
-
- memcpy(mac, m_reg, size);
-
- m_counter = 0;
- memset(m_reg, 0, blockSize);
-}
-
-NAMESPACE_END
-
-#endif