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author | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
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committer | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
commit | bed2ee22e8283a2e8bd0790a89124839319c2fc3 (patch) | |
tree | ee9e66a7b7c63995797a502f209079c1422ce9c9 /lib/cryptopp/ccm.cpp | |
parent | Refactored cBlockHandler::OnUse and dependents (diff) | |
parent | Merge pull request #589 from mc-server/minecartimprovements (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | lib/cryptopp/ccm.cpp | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/lib/cryptopp/ccm.cpp b/lib/cryptopp/ccm.cpp deleted file mode 100644 index 030828ad8..000000000 --- a/lib/cryptopp/ccm.cpp +++ /dev/null @@ -1,140 +0,0 @@ -// ccm.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" - -#ifndef CRYPTOPP_IMPORTS - -#include "ccm.h" - -NAMESPACE_BEGIN(CryptoPP) - -void CCM_Base::SetKeyWithoutResync(const byte *userKey, size_t keylength, const NameValuePairs ¶ms) -{ - BlockCipher &blockCipher = AccessBlockCipher(); - - blockCipher.SetKey(userKey, keylength, params); - - if (blockCipher.BlockSize() != REQUIRED_BLOCKSIZE) - throw InvalidArgument(AlgorithmName() + ": block size of underlying block cipher is not 16"); - - m_digestSize = params.GetIntValueWithDefault(Name::DigestSize(), DefaultDigestSize()); - if (m_digestSize % 2 > 0 || m_digestSize < 4 || m_digestSize > 16) - throw InvalidArgument(AlgorithmName() + ": DigestSize must be 4, 6, 8, 10, 12, 14, or 16"); - - m_buffer.Grow(2*REQUIRED_BLOCKSIZE); - m_L = 8; -} - -void CCM_Base::Resync(const byte *iv, size_t len) -{ - BlockCipher &cipher = AccessBlockCipher(); - - m_L = REQUIRED_BLOCKSIZE-1-(int)len; - assert(m_L >= 2); - if (m_L > 8) - m_L = 8; - - m_buffer[0] = byte(m_L-1); // flag - memcpy(m_buffer+1, iv, len); - memset(m_buffer+1+len, 0, REQUIRED_BLOCKSIZE-1-len); - - if (m_state >= State_IVSet) - m_ctr.Resynchronize(m_buffer, REQUIRED_BLOCKSIZE); - else - m_ctr.SetCipherWithIV(cipher, m_buffer); - - m_ctr.Seek(REQUIRED_BLOCKSIZE); - m_aadLength = 0; - m_messageLength = 0; -} - -void CCM_Base::UncheckedSpecifyDataLengths(lword headerLength, lword messageLength, lword footerLength) -{ - if (m_state != State_IVSet) - throw BadState(AlgorithmName(), "SpecifyDataLengths", "or after State_IVSet"); - - m_aadLength = headerLength; - m_messageLength = messageLength; - - byte *cbcBuffer = CBC_Buffer(); - const BlockCipher &cipher = GetBlockCipher(); - - cbcBuffer[0] = byte(64*(headerLength>0) + 8*((m_digestSize-2)/2) + (m_L-1)); // flag - PutWord<word64>(true, BIG_ENDIAN_ORDER, cbcBuffer+REQUIRED_BLOCKSIZE-8, m_messageLength); - memcpy(cbcBuffer+1, m_buffer+1, REQUIRED_BLOCKSIZE-1-m_L); - cipher.ProcessBlock(cbcBuffer); - - if (headerLength>0) - { - assert(m_bufferedDataLength == 0); - - if (headerLength < ((1<<16) - (1<<8))) - { - PutWord<word16>(true, BIG_ENDIAN_ORDER, m_buffer, (word16)headerLength); - m_bufferedDataLength = 2; - } - else if (headerLength < (W64LIT(1)<<32)) - { - m_buffer[0] = 0xff; - m_buffer[1] = 0xfe; - PutWord<word32>(false, BIG_ENDIAN_ORDER, m_buffer+2, (word32)headerLength); - m_bufferedDataLength = 6; - } - else - { - m_buffer[0] = 0xff; - m_buffer[1] = 0xff; - PutWord<word64>(false, BIG_ENDIAN_ORDER, m_buffer+2, headerLength); - m_bufferedDataLength = 10; - } - } -} - -size_t CCM_Base::AuthenticateBlocks(const byte *data, size_t len) -{ - byte *cbcBuffer = CBC_Buffer(); - const BlockCipher &cipher = GetBlockCipher(); - return cipher.AdvancedProcessBlocks(cbcBuffer, data, cbcBuffer, len, BlockTransformation::BT_DontIncrementInOutPointers|BlockTransformation::BT_XorInput); -} - -void CCM_Base::AuthenticateLastHeaderBlock() -{ - byte *cbcBuffer = CBC_Buffer(); - const BlockCipher &cipher = GetBlockCipher(); - - if (m_aadLength != m_totalHeaderLength) - throw InvalidArgument(AlgorithmName() + ": header length doesn't match that given in SpecifyDataLengths"); - - if (m_bufferedDataLength > 0) - { - xorbuf(cbcBuffer, m_buffer, m_bufferedDataLength); - cipher.ProcessBlock(cbcBuffer); - m_bufferedDataLength = 0; - } -} - -void CCM_Base::AuthenticateLastConfidentialBlock() -{ - byte *cbcBuffer = CBC_Buffer(); - const BlockCipher &cipher = GetBlockCipher(); - - if (m_messageLength != m_totalMessageLength) - throw InvalidArgument(AlgorithmName() + ": message length doesn't match that given in SpecifyDataLengths"); - - if (m_bufferedDataLength > 0) - { - xorbuf(cbcBuffer, m_buffer, m_bufferedDataLength); - cipher.ProcessBlock(cbcBuffer); - m_bufferedDataLength = 0; - } -} - -void CCM_Base::AuthenticateLastFooterBlock(byte *mac, size_t macSize) -{ - m_ctr.Seek(0); - m_ctr.ProcessData(mac, CBC_Buffer(), macSize); -} - -NAMESPACE_END - -#endif |