diff options
Diffstat (limited to 'CryptoPP/basecode.cpp')
| -rw-r--r-- | CryptoPP/basecode.cpp | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/CryptoPP/basecode.cpp b/CryptoPP/basecode.cpp deleted file mode 100644 index 0c98b2271..000000000 --- a/CryptoPP/basecode.cpp +++ /dev/null @@ -1,238 +0,0 @@ -// basecode.cpp - written and placed in the public domain by Wei Dai - -#include "pch.h" - -#ifndef CRYPTOPP_IMPORTS - -#include "basecode.h" -#include "fltrimpl.h" -#include <ctype.h> - -NAMESPACE_BEGIN(CryptoPP) - -void BaseN_Encoder::IsolatedInitialize(const NameValuePairs ¶meters) -{ - parameters.GetRequiredParameter("BaseN_Encoder", Name::EncodingLookupArray(), m_alphabet); - - parameters.GetRequiredIntParameter("BaseN_Encoder", Name::Log2Base(), m_bitsPerChar); - if (m_bitsPerChar <= 0 || m_bitsPerChar >= 8) - throw InvalidArgument("BaseN_Encoder: Log2Base must be between 1 and 7 inclusive"); - - byte padding; - bool pad; - if (parameters.GetValue(Name::PaddingByte(), padding)) - pad = parameters.GetValueWithDefault(Name::Pad(), true); - else - pad = false; - m_padding = pad ? padding : -1; - - m_bytePos = m_bitPos = 0; - - int i = 8; - while (i%m_bitsPerChar != 0) - i += 8; - m_outputBlockSize = i/m_bitsPerChar; - - m_outBuf.New(m_outputBlockSize); -} - -size_t BaseN_Encoder::Put2(const byte *begin, size_t length, int messageEnd, bool blocking) -{ - FILTER_BEGIN; - while (m_inputPosition < length) - { - if (m_bytePos == 0) - memset(m_outBuf, 0, m_outputBlockSize); - - { - unsigned int b = begin[m_inputPosition++], bitsLeftInSource = 8; - while (true) - { - assert(m_bitPos < m_bitsPerChar); - unsigned int bitsLeftInTarget = m_bitsPerChar-m_bitPos; - m_outBuf[m_bytePos] |= b >> (8-bitsLeftInTarget); - if (bitsLeftInSource >= bitsLeftInTarget) - { - m_bitPos = 0; - ++m_bytePos; - bitsLeftInSource -= bitsLeftInTarget; - if (bitsLeftInSource == 0) - break; - b <<= bitsLeftInTarget; - b &= 0xff; - } - else - { - m_bitPos += bitsLeftInSource; - break; - } - } - } - - assert(m_bytePos <= m_outputBlockSize); - if (m_bytePos == m_outputBlockSize) - { - int i; - for (i=0; i<m_bytePos; i++) - { - assert(m_outBuf[i] < (1 << m_bitsPerChar)); - m_outBuf[i] = m_alphabet[m_outBuf[i]]; - } - FILTER_OUTPUT(1, m_outBuf, m_outputBlockSize, 0); - - m_bytePos = m_bitPos = 0; - } - } - if (messageEnd) - { - if (m_bitPos > 0) - ++m_bytePos; - - int i; - for (i=0; i<m_bytePos; i++) - m_outBuf[i] = m_alphabet[m_outBuf[i]]; - - if (m_padding != -1 && m_bytePos > 0) - { - memset(m_outBuf+m_bytePos, m_padding, m_outputBlockSize-m_bytePos); - m_bytePos = m_outputBlockSize; - } - FILTER_OUTPUT(2, m_outBuf, m_bytePos, messageEnd); - m_bytePos = m_bitPos = 0; - } - FILTER_END_NO_MESSAGE_END; -} - -void BaseN_Decoder::IsolatedInitialize(const NameValuePairs ¶meters) -{ - parameters.GetRequiredParameter("BaseN_Decoder", Name::DecodingLookupArray(), m_lookup); - - parameters.GetRequiredIntParameter("BaseN_Decoder", Name::Log2Base(), m_bitsPerChar); - if (m_bitsPerChar <= 0 || m_bitsPerChar >= 8) - throw InvalidArgument("BaseN_Decoder: Log2Base must be between 1 and 7 inclusive"); - - m_bytePos = m_bitPos = 0; - - int i = m_bitsPerChar; - while (i%8 != 0) - i += m_bitsPerChar; - m_outputBlockSize = i/8; - - m_outBuf.New(m_outputBlockSize); -} - -size_t BaseN_Decoder::Put2(const byte *begin, size_t length, int messageEnd, bool blocking) -{ - FILTER_BEGIN; - while (m_inputPosition < length) - { - unsigned int value; - value = m_lookup[begin[m_inputPosition++]]; - if (value >= 256) - continue; - - if (m_bytePos == 0 && m_bitPos == 0) - memset(m_outBuf, 0, m_outputBlockSize); - - { - int newBitPos = m_bitPos + m_bitsPerChar; - if (newBitPos <= 8) - m_outBuf[m_bytePos] |= value << (8-newBitPos); - else - { - m_outBuf[m_bytePos] |= value >> (newBitPos-8); - m_outBuf[m_bytePos+1] |= value << (16-newBitPos); - } - - m_bitPos = newBitPos; - while (m_bitPos >= 8) - { - m_bitPos -= 8; - ++m_bytePos; - } - } - - if (m_bytePos == m_outputBlockSize) - { - FILTER_OUTPUT(1, m_outBuf, m_outputBlockSize, 0); - m_bytePos = m_bitPos = 0; - } - } - if (messageEnd) - { - FILTER_OUTPUT(2, m_outBuf, m_bytePos, messageEnd); - m_bytePos = m_bitPos = 0; - } - FILTER_END_NO_MESSAGE_END; -} - -void BaseN_Decoder::InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive) -{ - std::fill(lookup, lookup+256, -1); - - for (unsigned int i=0; i<base; i++) - { - if (caseInsensitive && isalpha(alphabet[i])) - { - assert(lookup[toupper(alphabet[i])] == -1); - lookup[toupper(alphabet[i])] = i; - assert(lookup[tolower(alphabet[i])] == -1); - lookup[tolower(alphabet[i])] = i; - } - else - { - assert(lookup[alphabet[i]] == -1); - lookup[alphabet[i]] = i; - } - } -} - -void Grouper::IsolatedInitialize(const NameValuePairs ¶meters) -{ - m_groupSize = parameters.GetIntValueWithDefault(Name::GroupSize(), 0); - ConstByteArrayParameter separator, terminator; - if (m_groupSize) - parameters.GetRequiredParameter("Grouper", Name::Separator(), separator); - else - parameters.GetValue(Name::Separator(), separator); - parameters.GetValue(Name::Terminator(), terminator); - - m_separator.Assign(separator.begin(), separator.size()); - m_terminator.Assign(terminator.begin(), terminator.size()); - m_counter = 0; -} - -size_t Grouper::Put2(const byte *begin, size_t length, int messageEnd, bool blocking) -{ - FILTER_BEGIN; - if (m_groupSize) - { - while (m_inputPosition < length) - { - if (m_counter == m_groupSize) - { - FILTER_OUTPUT(1, m_separator, m_separator.size(), 0); - m_counter = 0; - } - - size_t len; - FILTER_OUTPUT2(2, len = STDMIN(length-m_inputPosition, m_groupSize-m_counter), - begin+m_inputPosition, len, 0); - m_inputPosition += len; - m_counter += len; - } - } - else - FILTER_OUTPUT(3, begin, length, 0); - - if (messageEnd) - { - FILTER_OUTPUT(4, m_terminator, m_terminator.size(), messageEnd); - m_counter = 0; - } - FILTER_END_NO_MESSAGE_END -} - -NAMESPACE_END - -#endif |