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Diffstat (limited to '')
| -rw-r--r-- | CryptoPP/ida.h | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/CryptoPP/ida.h b/CryptoPP/ida.h deleted file mode 100644 index 8ebb4ec91..000000000 --- a/CryptoPP/ida.h +++ /dev/null @@ -1,152 +0,0 @@ -#ifndef CRYPTOPP_IDA_H -#define CRYPTOPP_IDA_H - -#include "mqueue.h" -#include "filters.h" -#include "channels.h" -#include <map> -#include <vector> - -NAMESPACE_BEGIN(CryptoPP) - -/// base class for secret sharing and information dispersal -class RawIDA : public AutoSignaling<Unflushable<Multichannel<Filter> > > -{ -public: - RawIDA(BufferedTransformation *attachment=NULL) - {Detach(attachment);} - - unsigned int GetThreshold() const {return m_threshold;} - void AddOutputChannel(word32 channelId); - void ChannelData(word32 channelId, const byte *inString, size_t length, bool messageEnd); - lword InputBuffered(word32 channelId) const; - - void IsolatedInitialize(const NameValuePairs ¶meters=g_nullNameValuePairs); - size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking) - { - if (!blocking) - throw BlockingInputOnly("RawIDA"); - ChannelData(StringToWord<word32>(channel), begin, length, messageEnd != 0); - return 0; - } - -protected: - virtual void FlushOutputQueues(); - virtual void OutputMessageEnds(); - - unsigned int InsertInputChannel(word32 channelId); - unsigned int LookupInputChannel(word32 channelId) const; - void ComputeV(unsigned int); - void PrepareInterpolation(); - void ProcessInputQueues(); - - typedef std::map<word32, unsigned int> InputChannelMap; - InputChannelMap m_inputChannelMap; - InputChannelMap::iterator m_lastMapPosition; - std::vector<MessageQueue> m_inputQueues; - std::vector<word32> m_inputChannelIds, m_outputChannelIds, m_outputToInput; - std::vector<std::string> m_outputChannelIdStrings; - std::vector<ByteQueue> m_outputQueues; - int m_threshold; - unsigned int m_channelsReady, m_channelsFinished; - std::vector<SecBlock<word32> > m_v; - SecBlock<word32> m_u, m_w, m_y; -}; - -/// a variant of Shamir's Secret Sharing Algorithm -class SecretSharing : public CustomFlushPropagation<Filter> -{ -public: - SecretSharing(RandomNumberGenerator &rng, int threshold, int nShares, BufferedTransformation *attachment=NULL, bool addPadding=true) - : m_rng(rng), m_ida(new OutputProxy(*this, true)) - { - Detach(attachment); - IsolatedInitialize(MakeParameters("RecoveryThreshold", threshold)("NumberOfShares", nShares)("AddPadding", addPadding)); - } - - void IsolatedInitialize(const NameValuePairs ¶meters=g_nullNameValuePairs); - size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking); - bool Flush(bool hardFlush, int propagation=-1, bool blocking=true) {return m_ida.Flush(hardFlush, propagation, blocking);} - -protected: - RandomNumberGenerator &m_rng; - RawIDA m_ida; - bool m_pad; -}; - -/// a variant of Shamir's Secret Sharing Algorithm -class SecretRecovery : public RawIDA -{ -public: - SecretRecovery(int threshold, BufferedTransformation *attachment=NULL, bool removePadding=true) - : RawIDA(attachment) - {IsolatedInitialize(MakeParameters("RecoveryThreshold", threshold)("RemovePadding", removePadding));} - - void IsolatedInitialize(const NameValuePairs ¶meters=g_nullNameValuePairs); - -protected: - void FlushOutputQueues(); - void OutputMessageEnds(); - - bool m_pad; -}; - -/// a variant of Rabin's Information Dispersal Algorithm -class InformationDispersal : public CustomFlushPropagation<Filter> -{ -public: - InformationDispersal(int threshold, int nShares, BufferedTransformation *attachment=NULL, bool addPadding=true) - : m_ida(new OutputProxy(*this, true)) - { - Detach(attachment); - IsolatedInitialize(MakeParameters("RecoveryThreshold", threshold)("NumberOfShares", nShares)("AddPadding", addPadding)); - } - - void IsolatedInitialize(const NameValuePairs ¶meters=g_nullNameValuePairs); - size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking); - bool Flush(bool hardFlush, int propagation=-1, bool blocking=true) {return m_ida.Flush(hardFlush, propagation, blocking);} - -protected: - RawIDA m_ida; - bool m_pad; - unsigned int m_nextChannel; -}; - -/// a variant of Rabin's Information Dispersal Algorithm -class InformationRecovery : public RawIDA -{ -public: - InformationRecovery(int threshold, BufferedTransformation *attachment=NULL, bool removePadding=true) - : RawIDA(attachment) - {IsolatedInitialize(MakeParameters("RecoveryThreshold", threshold)("RemovePadding", removePadding));} - - void IsolatedInitialize(const NameValuePairs ¶meters=g_nullNameValuePairs); - -protected: - void FlushOutputQueues(); - void OutputMessageEnds(); - - bool m_pad; - ByteQueue m_queue; -}; - -class PaddingRemover : public Unflushable<Filter> -{ -public: - PaddingRemover(BufferedTransformation *attachment=NULL) - : m_possiblePadding(false) {Detach(attachment);} - - void IsolatedInitialize(const NameValuePairs ¶meters) {m_possiblePadding = false;} - size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking); - - // GetPossiblePadding() == false at the end of a message indicates incorrect padding - bool GetPossiblePadding() const {return m_possiblePadding;} - -private: - bool m_possiblePadding; - lword m_zeroCount; -}; - -NAMESPACE_END - -#endif |