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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/authenc.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/authenc.cpp | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/lib/cryptopp/authenc.cpp b/lib/cryptopp/authenc.cpp deleted file mode 100644 index f93662efb..000000000 --- a/lib/cryptopp/authenc.cpp +++ /dev/null @@ -1,180 +0,0 @@ -// authenc.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" - -#ifndef CRYPTOPP_IMPORTS - -#include "authenc.h" - -NAMESPACE_BEGIN(CryptoPP) - -void AuthenticatedSymmetricCipherBase::AuthenticateData(const byte *input, size_t len) -{ - unsigned int blockSize = AuthenticationBlockSize(); - unsigned int &num = m_bufferedDataLength; - byte* data = m_buffer.begin(); - - if (num != 0) // process left over data - { - if (num+len >= blockSize) - { - memcpy(data+num, input, blockSize-num); - AuthenticateBlocks(data, blockSize); - input += (blockSize-num); - len -= (blockSize-num); - num = 0; - // drop through and do the rest - } - else - { - memcpy(data+num, input, len); - num += (unsigned int)len; - return; - } - } - - // now process the input data in blocks of blockSize bytes and save the leftovers to m_data - if (len >= blockSize) - { - size_t leftOver = AuthenticateBlocks(input, len); - input += (len - leftOver); - len = leftOver; - } - - memcpy(data, input, len); - num = (unsigned int)len; -} - -void AuthenticatedSymmetricCipherBase::SetKey(const byte *userKey, size_t keylength, const NameValuePairs ¶ms) -{ - m_bufferedDataLength = 0; - m_state = State_Start; - - SetKeyWithoutResync(userKey, keylength, params); - m_state = State_KeySet; - - size_t length; - const byte *iv = GetIVAndThrowIfInvalid(params, length); - if (iv) - Resynchronize(iv, (int)length); -} - -void AuthenticatedSymmetricCipherBase::Resynchronize(const byte *iv, int length) -{ - if (m_state < State_KeySet) - throw BadState(AlgorithmName(), "Resynchronize", "key is set"); - - m_bufferedDataLength = 0; - m_totalHeaderLength = m_totalMessageLength = m_totalFooterLength = 0; - m_state = State_KeySet; - - Resync(iv, this->ThrowIfInvalidIVLength(length)); - m_state = State_IVSet; -} - -void AuthenticatedSymmetricCipherBase::Update(const byte *input, size_t length) -{ - if (length == 0) - return; - - switch (m_state) - { - case State_Start: - case State_KeySet: - throw BadState(AlgorithmName(), "Update", "setting key and IV"); - case State_IVSet: - AuthenticateData(input, length); - m_totalHeaderLength += length; - break; - case State_AuthUntransformed: - case State_AuthTransformed: - AuthenticateLastConfidentialBlock(); - m_bufferedDataLength = 0; - m_state = State_AuthFooter; - // fall through - case State_AuthFooter: - AuthenticateData(input, length); - m_totalFooterLength += length; - break; - default: - assert(false); - } -} - -void AuthenticatedSymmetricCipherBase::ProcessData(byte *outString, const byte *inString, size_t length) -{ - m_totalMessageLength += length; - if (m_state >= State_IVSet && m_totalMessageLength > MaxMessageLength()) - throw InvalidArgument(AlgorithmName() + ": message length exceeds maximum"); - -reswitch: - switch (m_state) - { - case State_Start: - case State_KeySet: - throw BadState(AlgorithmName(), "ProcessData", "setting key and IV"); - case State_AuthFooter: - throw BadState(AlgorithmName(), "ProcessData was called after footer input has started"); - case State_IVSet: - AuthenticateLastHeaderBlock(); - m_bufferedDataLength = 0; - m_state = AuthenticationIsOnPlaintext()==IsForwardTransformation() ? State_AuthUntransformed : State_AuthTransformed; - goto reswitch; - case State_AuthUntransformed: - AuthenticateData(inString, length); - AccessSymmetricCipher().ProcessData(outString, inString, length); - break; - case State_AuthTransformed: - AccessSymmetricCipher().ProcessData(outString, inString, length); - AuthenticateData(outString, length); - break; - default: - assert(false); - } -} - -void AuthenticatedSymmetricCipherBase::TruncatedFinal(byte *mac, size_t macSize) -{ - if (m_totalHeaderLength > MaxHeaderLength()) - throw InvalidArgument(AlgorithmName() + ": header length of " + IntToString(m_totalHeaderLength) + " exceeds the maximum of " + IntToString(MaxHeaderLength())); - - if (m_totalFooterLength > MaxFooterLength()) - { - if (MaxFooterLength() == 0) - throw InvalidArgument(AlgorithmName() + ": additional authenticated data (AAD) cannot be input after data to be encrypted or decrypted"); - else - throw InvalidArgument(AlgorithmName() + ": footer length of " + IntToString(m_totalFooterLength) + " exceeds the maximum of " + IntToString(MaxFooterLength())); - } - - switch (m_state) - { - case State_Start: - case State_KeySet: - throw BadState(AlgorithmName(), "TruncatedFinal", "setting key and IV"); - - case State_IVSet: - AuthenticateLastHeaderBlock(); - m_bufferedDataLength = 0; - // fall through - - case State_AuthUntransformed: - case State_AuthTransformed: - AuthenticateLastConfidentialBlock(); - m_bufferedDataLength = 0; - // fall through - - case State_AuthFooter: - AuthenticateLastFooterBlock(mac, macSize); - m_bufferedDataLength = 0; - break; - - default: - assert(false); - } - - m_state = State_KeySet; -} - -NAMESPACE_END - -#endif |