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https://github.com/shadps4-emu/ext-cryptopp.git
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1704 lines
64 KiB
C++
1704 lines
64 KiB
C++
// pubkey.h - written and placed in the public domain by Wei Dai
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#ifndef CRYPTOPP_PUBKEY_H
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#define CRYPTOPP_PUBKEY_H
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/** \file
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This file contains helper classes/functions for implementing public key algorithms.
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The class hierachies in this .h file tend to look like this:
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<pre>
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x1
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/ \
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y1 z1
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x2<y1> x2<z1>
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y2 z2
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x3<y2> x3<z2>
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y3 z3
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</pre>
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- x1, y1, z1 are abstract interface classes defined in cryptlib.h
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- x2, y2, z2 are implementations of the interfaces using "abstract policies", which
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are pure virtual functions that should return interfaces to interchangeable algorithms.
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These classes have "Base" suffixes.
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- x3, y3, z3 hold actual algorithms and implement those virtual functions.
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These classes have "Impl" suffixes.
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The "TF_" prefix means an implementation using trapdoor functions on integers.
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The "DL_" prefix means an implementation using group operations (in groups where discrete log is hard).
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*/
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#include "modarith.h"
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#include "filters.h"
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#include "eprecomp.h"
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#include "fips140.h"
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#include "argnames.h"
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#include <memory>
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// VC60 workaround: this macro is defined in shlobj.h and conflicts with a template parameter used in this file
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#undef INTERFACE
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NAMESPACE_BEGIN(CryptoPP)
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TrapdoorFunctionBounds
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{
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public:
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virtual ~TrapdoorFunctionBounds() {}
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virtual Integer PreimageBound() const =0;
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virtual Integer ImageBound() const =0;
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virtual Integer MaxPreimage() const {return --PreimageBound();}
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virtual Integer MaxImage() const {return --ImageBound();}
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE RandomizedTrapdoorFunction : public TrapdoorFunctionBounds
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{
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public:
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virtual Integer ApplyRandomizedFunction(RandomNumberGenerator &rng, const Integer &x) const =0;
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virtual bool IsRandomized() const {return true;}
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TrapdoorFunction : public RandomizedTrapdoorFunction
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{
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public:
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Integer ApplyRandomizedFunction(RandomNumberGenerator &rng, const Integer &x) const
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{return ApplyFunction(x);}
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bool IsRandomized() const {return false;}
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virtual Integer ApplyFunction(const Integer &x) const =0;
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE RandomizedTrapdoorFunctionInverse
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{
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public:
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virtual ~RandomizedTrapdoorFunctionInverse() {}
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virtual Integer CalculateRandomizedInverse(RandomNumberGenerator &rng, const Integer &x) const =0;
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virtual bool IsRandomized() const {return true;}
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TrapdoorFunctionInverse : public RandomizedTrapdoorFunctionInverse
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{
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public:
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virtual ~TrapdoorFunctionInverse() {}
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Integer CalculateRandomizedInverse(RandomNumberGenerator &rng, const Integer &x) const
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{return CalculateInverse(rng, x);}
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bool IsRandomized() const {return false;}
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virtual Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const =0;
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};
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// ********************************************************
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//! message encoding method for public key encryption
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class CRYPTOPP_NO_VTABLE PK_EncryptionMessageEncodingMethod
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{
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public:
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virtual ~PK_EncryptionMessageEncodingMethod() {}
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virtual bool ParameterSupported(const char *name) const {return false;}
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//! max size of unpadded message in bytes, given max size of padded message in bits (1 less than size of modulus)
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virtual unsigned int MaxUnpaddedLength(unsigned int paddedLength) const =0;
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virtual void Pad(RandomNumberGenerator &rng, const byte *raw, unsigned int inputLength, byte *padded, unsigned int paddedBitLength, const NameValuePairs ¶meters) const =0;
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virtual DecodingResult Unpad(const byte *padded, unsigned int paddedBitLength, byte *raw, const NameValuePairs ¶meters) const =0;
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};
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// ********************************************************
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//! .
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template <class TFI, class MEI>
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class CRYPTOPP_NO_VTABLE TF_Base
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{
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protected:
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virtual const TrapdoorFunctionBounds & GetTrapdoorFunctionBounds() const =0;
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typedef TFI TrapdoorFunctionInterface;
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virtual const TrapdoorFunctionInterface & GetTrapdoorFunctionInterface() const =0;
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typedef MEI MessageEncodingInterface;
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virtual const MessageEncodingInterface & GetMessageEncodingInterface() const =0;
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};
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// ********************************************************
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template <class BASE>
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class CRYPTOPP_NO_VTABLE PK_FixedLengthCryptoSystemImpl : public BASE
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{
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public:
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unsigned int MaxPlaintextLength(unsigned int ciphertextLength) const
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{return ciphertextLength == FixedCiphertextLength() ? FixedMaxPlaintextLength() : 0;}
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unsigned int CiphertextLength(unsigned int plaintextLength) const
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{return plaintextLength <= FixedMaxPlaintextLength() ? FixedCiphertextLength() : 0;}
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virtual unsigned int FixedMaxPlaintextLength() const =0;
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virtual unsigned int FixedCiphertextLength() const =0;
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};
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//! .
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template <class INTERFACE, class BASE>
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class CRYPTOPP_NO_VTABLE TF_CryptoSystemBase : public PK_FixedLengthCryptoSystemImpl<INTERFACE>, protected BASE
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{
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public:
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bool ParameterSupported(const char *name) const {return this->GetMessageEncodingInterface().ParameterSupported(name);}
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unsigned int FixedMaxPlaintextLength() const {return this->GetMessageEncodingInterface().MaxUnpaddedLength(PaddedBlockBitLength());}
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unsigned int FixedCiphertextLength() const {return this->GetTrapdoorFunctionBounds().MaxImage().ByteCount();}
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protected:
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unsigned int PaddedBlockByteLength() const {return BitsToBytes(PaddedBlockBitLength());}
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unsigned int PaddedBlockBitLength() const {return this->GetTrapdoorFunctionBounds().PreimageBound().BitCount()-1;}
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TF_DecryptorBase : public TF_CryptoSystemBase<PK_Decryptor, TF_Base<TrapdoorFunctionInverse, PK_EncryptionMessageEncodingMethod> >
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{
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public:
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DecodingResult Decrypt(RandomNumberGenerator &rng, const byte *ciphertext, unsigned int ciphertextLength, byte *plaintext, const NameValuePairs ¶meters = g_nullNameValuePairs) const;
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TF_EncryptorBase : public TF_CryptoSystemBase<PK_Encryptor, TF_Base<RandomizedTrapdoorFunction, PK_EncryptionMessageEncodingMethod> >
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{
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public:
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void Encrypt(RandomNumberGenerator &rng, const byte *plaintext, unsigned int plaintextLength, byte *ciphertext, const NameValuePairs ¶meters = g_nullNameValuePairs) const;
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};
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// ********************************************************
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typedef std::pair<const byte *, unsigned int> HashIdentifier;
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//! .
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class CRYPTOPP_NO_VTABLE PK_SignatureMessageEncodingMethod
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{
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public:
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virtual ~PK_SignatureMessageEncodingMethod() {}
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virtual unsigned int MaxRecoverableLength(unsigned int representativeBitLength, unsigned int hashIdentifierLength, unsigned int digestLength) const
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{return 0;}
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bool IsProbabilistic() const
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{return true;}
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bool AllowNonrecoverablePart() const
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{throw NotImplemented("PK_MessageEncodingMethod: this signature scheme does not support message recovery");}
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virtual bool RecoverablePartFirst() const
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{throw NotImplemented("PK_MessageEncodingMethod: this signature scheme does not support message recovery");}
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// for verification, DL
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virtual void ProcessSemisignature(HashTransformation &hash, const byte *semisignature, unsigned int semisignatureLength) const {}
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// for signature
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virtual void ProcessRecoverableMessage(HashTransformation &hash,
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const byte *recoverableMessage, unsigned int recoverableMessageLength,
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const byte *presignature, unsigned int presignatureLength,
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SecByteBlock &semisignature) const
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{
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if (RecoverablePartFirst())
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assert(!"ProcessRecoverableMessage() not implemented");
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}
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virtual void ComputeMessageRepresentative(RandomNumberGenerator &rng,
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const byte *recoverableMessage, unsigned int recoverableMessageLength,
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength) const =0;
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virtual bool VerifyMessageRepresentative(
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength) const =0;
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virtual DecodingResult RecoverMessageFromRepresentative( // for TF
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength,
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byte *recoveredMessage) const
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{throw NotImplemented("PK_MessageEncodingMethod: this signature scheme does not support message recovery");}
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virtual DecodingResult RecoverMessageFromSemisignature( // for DL
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HashTransformation &hash, HashIdentifier hashIdentifier,
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const byte *presignature, unsigned int presignatureLength,
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const byte *semisignature, unsigned int semisignatureLength,
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byte *recoveredMessage) const
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{throw NotImplemented("PK_MessageEncodingMethod: this signature scheme does not support message recovery");}
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// VC60 workaround
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struct HashIdentifierLookup
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{
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template <class H> struct HashIdentifierLookup2
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{
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static HashIdentifier Lookup()
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{
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return HashIdentifier(NULL, 0);
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}
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};
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};
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};
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_DeterministicSignatureMessageEncodingMethod : public PK_SignatureMessageEncodingMethod
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{
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public:
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bool VerifyMessageRepresentative(
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength) const;
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};
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_RecoverableSignatureMessageEncodingMethod : public PK_SignatureMessageEncodingMethod
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{
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public:
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bool VerifyMessageRepresentative(
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength) const;
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};
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class CRYPTOPP_DLL DL_SignatureMessageEncodingMethod_DSA : public PK_DeterministicSignatureMessageEncodingMethod
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{
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public:
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void ComputeMessageRepresentative(RandomNumberGenerator &rng,
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const byte *recoverableMessage, unsigned int recoverableMessageLength,
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength) const;
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};
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class CRYPTOPP_DLL DL_SignatureMessageEncodingMethod_NR : public PK_DeterministicSignatureMessageEncodingMethod
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{
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public:
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void ComputeMessageRepresentative(RandomNumberGenerator &rng,
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const byte *recoverableMessage, unsigned int recoverableMessageLength,
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength) const;
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};
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE PK_MessageAccumulatorBase : public PK_MessageAccumulator
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{
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public:
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PK_MessageAccumulatorBase() : m_empty(true) {}
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virtual HashTransformation & AccessHash() =0;
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void Update(const byte *input, unsigned int length)
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{
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AccessHash().Update(input, length);
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m_empty = m_empty && length == 0;
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}
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SecByteBlock m_recoverableMessage, m_representative, m_presignature, m_semisignature;
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Integer m_k, m_s;
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bool m_empty;
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};
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template <class HASH_ALGORITHM>
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class PK_MessageAccumulatorImpl : public PK_MessageAccumulatorBase, protected ObjectHolder<HASH_ALGORITHM>
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{
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public:
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HashTransformation & AccessHash() {return this->m_object;}
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};
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//! .
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template <class INTERFACE, class BASE>
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class CRYPTOPP_NO_VTABLE TF_SignatureSchemeBase : public INTERFACE, protected BASE
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{
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public:
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unsigned int SignatureLength() const
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{return this->GetTrapdoorFunctionBounds().MaxPreimage().ByteCount();}
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unsigned int MaxRecoverableLength() const
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{return this->GetMessageEncodingInterface().MaxRecoverableLength(MessageRepresentativeBitLength(), GetHashIdentifier().second, GetDigestSize());}
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unsigned int MaxRecoverableLengthFromSignatureLength(unsigned int signatureLength) const
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{return this->MaxRecoverableLength();}
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bool IsProbabilistic() const
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{return this->GetTrapdoorFunctionInterface().IsRandomized() || this->GetMessageEncodingInterface().IsProbabilistic();}
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bool AllowNonrecoverablePart() const
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{return this->GetMessageEncodingInterface().AllowNonrecoverablePart();}
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bool RecoverablePartFirst() const
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{return this->GetMessageEncodingInterface().RecoverablePartFirst();}
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protected:
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unsigned int MessageRepresentativeLength() const {return BitsToBytes(MessageRepresentativeBitLength());}
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unsigned int MessageRepresentativeBitLength() const {return this->GetTrapdoorFunctionBounds().ImageBound().BitCount()-1;}
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virtual HashIdentifier GetHashIdentifier() const =0;
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virtual unsigned int GetDigestSize() const =0;
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TF_SignerBase : public TF_SignatureSchemeBase<PK_Signer, TF_Base<RandomizedTrapdoorFunctionInverse, PK_SignatureMessageEncodingMethod> >
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{
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public:
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void InputRecoverableMessage(PK_MessageAccumulator &messageAccumulator, const byte *recoverableMessage, unsigned int recoverableMessageLength) const;
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unsigned int SignAndRestart(RandomNumberGenerator &rng, PK_MessageAccumulator &messageAccumulator, byte *signature, bool restart=true) const;
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};
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//! .
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class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE TF_VerifierBase : public TF_SignatureSchemeBase<PK_Verifier, TF_Base<TrapdoorFunction, PK_SignatureMessageEncodingMethod> >
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{
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public:
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void InputSignature(PK_MessageAccumulator &messageAccumulator, const byte *signature, unsigned int signatureLength) const;
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bool VerifyAndRestart(PK_MessageAccumulator &messageAccumulator) const;
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DecodingResult RecoverAndRestart(byte *recoveredMessage, PK_MessageAccumulator &recoveryAccumulator) const;
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};
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// ********************************************************
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//! .
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template <class T1, class T2, class T3>
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struct TF_CryptoSchemeOptions
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{
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typedef T1 AlgorithmInfo;
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typedef T2 Keys;
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typedef typename Keys::PrivateKey PrivateKey;
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typedef typename Keys::PublicKey PublicKey;
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typedef T3 MessageEncodingMethod;
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};
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//! .
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template <class T1, class T2, class T3, class T4>
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struct TF_SignatureSchemeOptions : public TF_CryptoSchemeOptions<T1, T2, T3>
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{
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typedef T4 HashFunction;
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};
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//! .
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template <class KEYS>
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class CRYPTOPP_NO_VTABLE PublicKeyCopier
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{
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public:
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typedef typename KEYS::PublicKey KeyClass;
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virtual void CopyKeyInto(typename KEYS::PublicKey &key) const =0;
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};
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//! .
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template <class KEYS>
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class CRYPTOPP_NO_VTABLE PrivateKeyCopier
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{
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public:
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typedef typename KEYS::PrivateKey KeyClass;
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virtual void CopyKeyInto(typename KEYS::PublicKey &key) const =0;
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virtual void CopyKeyInto(typename KEYS::PrivateKey &key) const =0;
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};
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//! .
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template <class BASE, class SCHEME_OPTIONS, class KEY>
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class CRYPTOPP_NO_VTABLE TF_ObjectImplBase : public AlgorithmImpl<BASE, typename SCHEME_OPTIONS::AlgorithmInfo>
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{
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public:
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typedef SCHEME_OPTIONS SchemeOptions;
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typedef KEY KeyClass;
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PublicKey & AccessPublicKey() {return AccessKey();}
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const PublicKey & GetPublicKey() const {return GetKey();}
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PrivateKey & AccessPrivateKey() {return AccessKey();}
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const PrivateKey & GetPrivateKey() const {return GetKey();}
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virtual const KeyClass & GetKey() const =0;
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virtual KeyClass & AccessKey() =0;
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const KeyClass & GetTrapdoorFunction() const {return GetKey();}
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PK_MessageAccumulator * NewSignatureAccumulator(RandomNumberGenerator &rng) const
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{
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return new PK_MessageAccumulatorImpl<CPP_TYPENAME SCHEME_OPTIONS::HashFunction>;
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}
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PK_MessageAccumulator * NewVerificationAccumulator() const
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{
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return new PK_MessageAccumulatorImpl<CPP_TYPENAME SCHEME_OPTIONS::HashFunction>;
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}
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protected:
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const typename BASE::MessageEncodingInterface & GetMessageEncodingInterface() const
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{return Singleton<CPP_TYPENAME SCHEME_OPTIONS::MessageEncodingMethod>().Ref();}
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const TrapdoorFunctionBounds & GetTrapdoorFunctionBounds() const
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{return GetKey();}
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const typename BASE::TrapdoorFunctionInterface & GetTrapdoorFunctionInterface() const
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{return GetKey();}
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// for signature scheme
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HashIdentifier GetHashIdentifier() const
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{
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typedef CPP_TYPENAME SchemeOptions::MessageEncodingMethod::HashIdentifierLookup::template HashIdentifierLookup2<CPP_TYPENAME SchemeOptions::HashFunction> L;
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return L::Lookup();
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}
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unsigned int GetDigestSize() const
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{
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typedef CPP_TYPENAME SchemeOptions::HashFunction H;
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return H::DIGESTSIZE;
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}
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};
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//! .
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template <class BASE, class SCHEME_OPTIONS, class KEY>
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class TF_ObjectImplExtRef : public TF_ObjectImplBase<BASE, SCHEME_OPTIONS, KEY>
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{
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public:
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TF_ObjectImplExtRef(const KEY *pKey = NULL) : m_pKey(pKey) {}
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void SetKeyPtr(const KEY *pKey) {m_pKey = pKey;}
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const KEY & GetKey() const {return *m_pKey;}
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KEY & AccessKey() {throw NotImplemented("TF_ObjectImplExtRef: cannot modify refererenced key");}
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private:
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const KEY * m_pKey;
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};
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//! .
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template <class BASE, class SCHEME_OPTIONS, class KEY_COPIER>
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class CRYPTOPP_NO_VTABLE TF_ObjectImpl : public TF_ObjectImplBase<TwoBases<BASE, KEY_COPIER>, SCHEME_OPTIONS, typename KEY_COPIER::KeyClass>
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{
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public:
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typedef typename KEY_COPIER::KeyClass KeyClass;
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const KeyClass & GetKey() const {return m_trapdoorFunction;}
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KeyClass & AccessKey() {return m_trapdoorFunction;}
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void CopyKeyInto(typename SCHEME_OPTIONS::PrivateKey &key) const {key = GetKey();}
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void CopyKeyInto(typename SCHEME_OPTIONS::PublicKey &key) const {key = GetKey();}
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private:
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KeyClass m_trapdoorFunction;
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};
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//! .
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template <class SCHEME_OPTIONS>
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class TF_DecryptorImpl : public TF_ObjectImpl<TF_DecryptorBase, SCHEME_OPTIONS, PrivateKeyCopier<typename SCHEME_OPTIONS::Keys> >
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{
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};
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//! .
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template <class SCHEME_OPTIONS>
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class TF_EncryptorImpl : public TF_ObjectImpl<TF_EncryptorBase, SCHEME_OPTIONS, PublicKeyCopier<typename SCHEME_OPTIONS::Keys> >
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{
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};
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//! .
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template <class SCHEME_OPTIONS>
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class TF_SignerImpl : public TF_ObjectImpl<TF_SignerBase, SCHEME_OPTIONS, PrivateKeyCopier<typename SCHEME_OPTIONS::Keys> >
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{
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};
|
|
|
|
//! .
|
|
template <class SCHEME_OPTIONS>
|
|
class TF_VerifierImpl : public TF_ObjectImpl<TF_VerifierBase, SCHEME_OPTIONS, PublicKeyCopier<typename SCHEME_OPTIONS::Keys> >
|
|
{
|
|
};
|
|
|
|
// ********************************************************
|
|
|
|
class CRYPTOPP_NO_VTABLE MaskGeneratingFunction
|
|
{
|
|
public:
|
|
virtual ~MaskGeneratingFunction() {}
|
|
virtual void GenerateAndMask(HashTransformation &hash, byte *output, unsigned int outputLength, const byte *input, unsigned int inputLength, bool mask = true) const =0;
|
|
};
|
|
|
|
CRYPTOPP_DLL void P1363_MGF1KDF2_Common(HashTransformation &hash, byte *output, unsigned int outputLength, const byte *input, unsigned int inputLength, const byte *derivationParams, unsigned int derivationParamsLength, bool mask, unsigned int counterStart);
|
|
|
|
//! .
|
|
class P1363_MGF1 : public MaskGeneratingFunction
|
|
{
|
|
public:
|
|
static const char * StaticAlgorithmName() {return "MGF1";}
|
|
void GenerateAndMask(HashTransformation &hash, byte *output, unsigned int outputLength, const byte *input, unsigned int inputLength, bool mask = true) const
|
|
{
|
|
P1363_MGF1KDF2_Common(hash, output, outputLength, input, inputLength, NULL, 0, mask, 0);
|
|
}
|
|
};
|
|
|
|
// ********************************************************
|
|
|
|
//! .
|
|
template <class H>
|
|
class P1363_KDF2
|
|
{
|
|
public:
|
|
static void DeriveKey(byte *output, unsigned int outputLength, const byte *input, unsigned int inputLength, const byte *derivationParams, unsigned int derivationParamsLength)
|
|
{
|
|
H h;
|
|
P1363_MGF1KDF2_Common(h, output, outputLength, input, inputLength, derivationParams, derivationParamsLength, false, 1);
|
|
}
|
|
};
|
|
|
|
// ********************************************************
|
|
|
|
// to be thrown by DecodeElement and AgreeWithStaticPrivateKey
|
|
class DL_BadElement : public InvalidDataFormat
|
|
{
|
|
public:
|
|
DL_BadElement() : InvalidDataFormat("CryptoPP: invalid group element") {}
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_GroupParameters : public CryptoParameters
|
|
{
|
|
typedef DL_GroupParameters<T> ThisClass;
|
|
|
|
public:
|
|
typedef T Element;
|
|
|
|
DL_GroupParameters() : m_validationLevel(0) {}
|
|
|
|
// CryptoMaterial
|
|
bool Validate(RandomNumberGenerator &rng, unsigned int level) const
|
|
{
|
|
if (!GetBasePrecomputation().IsInitialized())
|
|
return false;
|
|
|
|
if (m_validationLevel > level)
|
|
return true;
|
|
|
|
bool pass = ValidateGroup(rng, level);
|
|
pass = pass && ValidateElement(level, GetSubgroupGenerator(), &GetBasePrecomputation());
|
|
|
|
m_validationLevel = pass ? level+1 : 0;
|
|
|
|
return pass;
|
|
}
|
|
|
|
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
|
|
{
|
|
return GetValueHelper(this, name, valueType, pValue)
|
|
CRYPTOPP_GET_FUNCTION_ENTRY(SubgroupOrder)
|
|
CRYPTOPP_GET_FUNCTION_ENTRY(SubgroupGenerator)
|
|
;
|
|
}
|
|
|
|
bool SupportsPrecomputation() const {return true;}
|
|
|
|
void Precompute(unsigned int precomputationStorage=16)
|
|
{
|
|
AccessBasePrecomputation().Precompute(GetGroupPrecomputation(), GetSubgroupOrder().BitCount(), precomputationStorage);
|
|
}
|
|
|
|
void LoadPrecomputation(BufferedTransformation &storedPrecomputation)
|
|
{
|
|
AccessBasePrecomputation().Load(GetGroupPrecomputation(), storedPrecomputation);
|
|
m_validationLevel = 0;
|
|
}
|
|
|
|
void SavePrecomputation(BufferedTransformation &storedPrecomputation) const
|
|
{
|
|
GetBasePrecomputation().Save(GetGroupPrecomputation(), storedPrecomputation);
|
|
}
|
|
|
|
// non-inherited
|
|
virtual const Element & GetSubgroupGenerator() const {return GetBasePrecomputation().GetBase(GetGroupPrecomputation());}
|
|
virtual void SetSubgroupGenerator(const Element &base) {AccessBasePrecomputation().SetBase(GetGroupPrecomputation(), base);}
|
|
virtual Element ExponentiateBase(const Integer &exponent) const
|
|
{
|
|
return GetBasePrecomputation().Exponentiate(GetGroupPrecomputation(), exponent);
|
|
}
|
|
virtual Element ExponentiateElement(const Element &base, const Integer &exponent) const
|
|
{
|
|
Element result;
|
|
SimultaneousExponentiate(&result, base, &exponent, 1);
|
|
return result;
|
|
}
|
|
|
|
virtual const DL_GroupPrecomputation<Element> & GetGroupPrecomputation() const =0;
|
|
virtual const DL_FixedBasePrecomputation<Element> & GetBasePrecomputation() const =0;
|
|
virtual DL_FixedBasePrecomputation<Element> & AccessBasePrecomputation() =0;
|
|
virtual const Integer & GetSubgroupOrder() const =0; // order of subgroup generated by base element
|
|
virtual Integer GetMaxExponent() const =0;
|
|
virtual Integer GetGroupOrder() const {return GetSubgroupOrder()*GetCofactor();} // one of these two needs to be overriden
|
|
virtual Integer GetCofactor() const {return GetGroupOrder()/GetSubgroupOrder();}
|
|
virtual unsigned int GetEncodedElementSize(bool reversible) const =0;
|
|
virtual void EncodeElement(bool reversible, const Element &element, byte *encoded) const =0;
|
|
virtual Element DecodeElement(const byte *encoded, bool checkForGroupMembership) const =0;
|
|
virtual Integer ConvertElementToInteger(const Element &element) const =0;
|
|
virtual bool ValidateGroup(RandomNumberGenerator &rng, unsigned int level) const =0;
|
|
virtual bool ValidateElement(unsigned int level, const Element &element, const DL_FixedBasePrecomputation<Element> *precomp) const =0;
|
|
virtual bool FastSubgroupCheckAvailable() const =0;
|
|
virtual bool IsIdentity(const Element &element) const =0;
|
|
virtual void SimultaneousExponentiate(Element *results, const Element &base, const Integer *exponents, unsigned int exponentsCount) const =0;
|
|
|
|
protected:
|
|
void ParametersChanged() {m_validationLevel = 0;}
|
|
|
|
private:
|
|
mutable unsigned int m_validationLevel;
|
|
};
|
|
|
|
//! .
|
|
template <class GROUP_PRECOMP, class BASE_PRECOMP = DL_FixedBasePrecomputationImpl<CPP_TYPENAME GROUP_PRECOMP::Element>, class BASE = DL_GroupParameters<CPP_TYPENAME GROUP_PRECOMP::Element> >
|
|
class DL_GroupParametersImpl : public BASE
|
|
{
|
|
public:
|
|
typedef GROUP_PRECOMP GroupPrecomputation;
|
|
typedef typename GROUP_PRECOMP::Element Element;
|
|
typedef BASE_PRECOMP BasePrecomputation;
|
|
|
|
const DL_GroupPrecomputation<Element> & GetGroupPrecomputation() const {return m_groupPrecomputation;}
|
|
const DL_FixedBasePrecomputation<Element> & GetBasePrecomputation() const {return m_gpc;}
|
|
DL_FixedBasePrecomputation<Element> & AccessBasePrecomputation() {return m_gpc;}
|
|
|
|
protected:
|
|
GROUP_PRECOMP m_groupPrecomputation;
|
|
BASE_PRECOMP m_gpc;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_Key
|
|
{
|
|
public:
|
|
virtual const DL_GroupParameters<T> & GetAbstractGroupParameters() const =0;
|
|
virtual DL_GroupParameters<T> & AccessAbstractGroupParameters() =0;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_PublicKey : public DL_Key<T>
|
|
{
|
|
typedef DL_PublicKey<T> ThisClass;
|
|
|
|
public:
|
|
typedef T Element;
|
|
|
|
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
|
|
{
|
|
return GetValueHelper(this, name, valueType, pValue, &this->GetAbstractGroupParameters())
|
|
CRYPTOPP_GET_FUNCTION_ENTRY(PublicElement);
|
|
}
|
|
|
|
void AssignFrom(const NameValuePairs &source);
|
|
|
|
// non-inherited
|
|
virtual const Element & GetPublicElement() const {return GetPublicPrecomputation().GetBase(this->GetAbstractGroupParameters().GetGroupPrecomputation());}
|
|
virtual void SetPublicElement(const Element &y) {AccessPublicPrecomputation().SetBase(this->GetAbstractGroupParameters().GetGroupPrecomputation(), y);}
|
|
virtual Element ExponentiatePublicElement(const Integer &exponent) const
|
|
{
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
return GetPublicPrecomputation().Exponentiate(params.GetGroupPrecomputation(), exponent);
|
|
}
|
|
virtual Element CascadeExponentiateBaseAndPublicElement(const Integer &baseExp, const Integer &publicExp) const
|
|
{
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
return params.GetBasePrecomputation().CascadeExponentiate(params.GetGroupPrecomputation(), baseExp, GetPublicPrecomputation(), publicExp);
|
|
}
|
|
|
|
virtual const DL_FixedBasePrecomputation<T> & GetPublicPrecomputation() const =0;
|
|
virtual DL_FixedBasePrecomputation<T> & AccessPublicPrecomputation() =0;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_PrivateKey : public DL_Key<T>
|
|
{
|
|
typedef DL_PrivateKey<T> ThisClass;
|
|
|
|
public:
|
|
typedef T Element;
|
|
|
|
void MakePublicKey(DL_PublicKey<T> &pub) const
|
|
{
|
|
pub.AccessAbstractGroupParameters().AssignFrom(this->GetAbstractGroupParameters());
|
|
pub.SetPublicElement(this->GetAbstractGroupParameters().ExponentiateBase(GetPrivateExponent()));
|
|
}
|
|
|
|
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
|
|
{
|
|
return GetValueHelper(this, name, valueType, pValue, &this->GetAbstractGroupParameters())
|
|
CRYPTOPP_GET_FUNCTION_ENTRY(PrivateExponent);
|
|
}
|
|
|
|
void AssignFrom(const NameValuePairs &source)
|
|
{
|
|
this->AccessAbstractGroupParameters().AssignFrom(source);
|
|
AssignFromHelper(this, source)
|
|
CRYPTOPP_SET_FUNCTION_ENTRY(PrivateExponent);
|
|
}
|
|
|
|
virtual const Integer & GetPrivateExponent() const =0;
|
|
virtual void SetPrivateExponent(const Integer &x) =0;
|
|
};
|
|
|
|
template <class T>
|
|
void DL_PublicKey<T>::AssignFrom(const NameValuePairs &source)
|
|
{
|
|
DL_PrivateKey<T> *pPrivateKey = NULL;
|
|
if (source.GetThisPointer(pPrivateKey))
|
|
pPrivateKey->MakePublicKey(*this);
|
|
else
|
|
{
|
|
this->AccessAbstractGroupParameters().AssignFrom(source);
|
|
AssignFromHelper(this, source)
|
|
CRYPTOPP_SET_FUNCTION_ENTRY(PublicElement);
|
|
}
|
|
}
|
|
|
|
class OID;
|
|
|
|
//! .
|
|
template <class PK, class GP, class O = OID>
|
|
class DL_KeyImpl : public PK
|
|
{
|
|
public:
|
|
typedef GP GroupParameters;
|
|
|
|
O GetAlgorithmID() const {return GetGroupParameters().GetAlgorithmID();}
|
|
// void BERDecode(BufferedTransformation &bt)
|
|
// {PK::BERDecode(bt);}
|
|
// void DEREncode(BufferedTransformation &bt) const
|
|
// {PK::DEREncode(bt);}
|
|
bool BERDecodeAlgorithmParameters(BufferedTransformation &bt)
|
|
{AccessGroupParameters().BERDecode(bt); return true;}
|
|
bool DEREncodeAlgorithmParameters(BufferedTransformation &bt) const
|
|
{GetGroupParameters().DEREncode(bt); return true;}
|
|
|
|
const GP & GetGroupParameters() const {return m_groupParameters;}
|
|
GP & AccessGroupParameters() {return m_groupParameters;}
|
|
|
|
private:
|
|
GP m_groupParameters;
|
|
};
|
|
|
|
class X509PublicKey;
|
|
class PKCS8PrivateKey;
|
|
|
|
//! .
|
|
template <class GP>
|
|
class DL_PrivateKeyImpl : public DL_PrivateKey<CPP_TYPENAME GP::Element>, public DL_KeyImpl<PKCS8PrivateKey, GP>
|
|
{
|
|
public:
|
|
typedef typename GP::Element Element;
|
|
|
|
// GeneratableCryptoMaterial
|
|
bool Validate(RandomNumberGenerator &rng, unsigned int level) const
|
|
{
|
|
bool pass = GetAbstractGroupParameters().Validate(rng, level);
|
|
|
|
const Integer &q = GetAbstractGroupParameters().GetSubgroupOrder();
|
|
const Integer &x = GetPrivateExponent();
|
|
|
|
pass = pass && x.IsPositive() && x < q;
|
|
if (level >= 1)
|
|
pass = pass && Integer::Gcd(x, q) == Integer::One();
|
|
return pass;
|
|
}
|
|
|
|
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
|
|
{
|
|
return GetValueHelper<DL_PrivateKey<Element> >(this, name, valueType, pValue).Assignable();
|
|
}
|
|
|
|
void AssignFrom(const NameValuePairs &source)
|
|
{
|
|
AssignFromHelper<DL_PrivateKey<Element> >(this, source);
|
|
}
|
|
|
|
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs ¶ms)
|
|
{
|
|
if (!params.GetThisObject(this->AccessGroupParameters()))
|
|
this->AccessGroupParameters().GenerateRandom(rng, params);
|
|
// std::pair<const byte *, int> seed;
|
|
Integer x(rng, Integer::One(), GetAbstractGroupParameters().GetMaxExponent());
|
|
// Integer::ANY, Integer::Zero(), Integer::One(),
|
|
// params.GetValue("DeterministicKeyGenerationSeed", seed) ? &seed : NULL);
|
|
SetPrivateExponent(x);
|
|
}
|
|
|
|
bool SupportsPrecomputation() const {return true;}
|
|
|
|
void Precompute(unsigned int precomputationStorage=16)
|
|
{AccessAbstractGroupParameters().Precompute(precomputationStorage);}
|
|
|
|
void LoadPrecomputation(BufferedTransformation &storedPrecomputation)
|
|
{AccessAbstractGroupParameters().LoadPrecomputation(storedPrecomputation);}
|
|
|
|
void SavePrecomputation(BufferedTransformation &storedPrecomputation) const
|
|
{GetAbstractGroupParameters().SavePrecomputation(storedPrecomputation);}
|
|
|
|
// DL_Key
|
|
const DL_GroupParameters<Element> & GetAbstractGroupParameters() const {return this->GetGroupParameters();}
|
|
DL_GroupParameters<Element> & AccessAbstractGroupParameters() {return this->AccessGroupParameters();}
|
|
|
|
// DL_PrivateKey
|
|
const Integer & GetPrivateExponent() const {return m_x;}
|
|
void SetPrivateExponent(const Integer &x) {m_x = x;}
|
|
|
|
// PKCS8PrivateKey
|
|
void BERDecodeKey(BufferedTransformation &bt)
|
|
{m_x.BERDecode(bt);}
|
|
void DEREncodeKey(BufferedTransformation &bt) const
|
|
{m_x.DEREncode(bt);}
|
|
|
|
private:
|
|
Integer m_x;
|
|
};
|
|
|
|
//! .
|
|
template <class BASE, class SIGNATURE_SCHEME>
|
|
class DL_PrivateKey_WithSignaturePairwiseConsistencyTest : public BASE
|
|
{
|
|
public:
|
|
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs ¶ms)
|
|
{
|
|
BASE::GenerateRandom(rng, params);
|
|
|
|
if (FIPS_140_2_ComplianceEnabled())
|
|
{
|
|
typename SIGNATURE_SCHEME::Signer signer(*this);
|
|
typename SIGNATURE_SCHEME::Verifier verifier(signer);
|
|
SignaturePairwiseConsistencyTest_FIPS_140_Only(signer, verifier);
|
|
}
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class GP>
|
|
class DL_PublicKeyImpl : public DL_PublicKey<typename GP::Element>, public DL_KeyImpl<X509PublicKey, GP>
|
|
{
|
|
public:
|
|
typedef typename GP::Element Element;
|
|
|
|
// CryptoMaterial
|
|
bool Validate(RandomNumberGenerator &rng, unsigned int level) const
|
|
{
|
|
bool pass = GetAbstractGroupParameters().Validate(rng, level);
|
|
pass = pass && GetAbstractGroupParameters().ValidateElement(level, this->GetPublicElement(), &GetPublicPrecomputation());
|
|
return pass;
|
|
}
|
|
|
|
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const
|
|
{
|
|
return GetValueHelper<DL_PublicKey<Element> >(this, name, valueType, pValue).Assignable();
|
|
}
|
|
|
|
void AssignFrom(const NameValuePairs &source)
|
|
{
|
|
AssignFromHelper<DL_PublicKey<Element> >(this, source);
|
|
}
|
|
|
|
bool SupportsPrecomputation() const {return true;}
|
|
|
|
void Precompute(unsigned int precomputationStorage=16)
|
|
{
|
|
AccessAbstractGroupParameters().Precompute(precomputationStorage);
|
|
AccessPublicPrecomputation().Precompute(GetAbstractGroupParameters().GetGroupPrecomputation(), GetAbstractGroupParameters().GetSubgroupOrder().BitCount(), precomputationStorage);
|
|
}
|
|
|
|
void LoadPrecomputation(BufferedTransformation &storedPrecomputation)
|
|
{
|
|
AccessAbstractGroupParameters().LoadPrecomputation(storedPrecomputation);
|
|
AccessPublicPrecomputation().Load(GetAbstractGroupParameters().GetGroupPrecomputation(), storedPrecomputation);
|
|
}
|
|
|
|
void SavePrecomputation(BufferedTransformation &storedPrecomputation) const
|
|
{
|
|
GetAbstractGroupParameters().SavePrecomputation(storedPrecomputation);
|
|
GetPublicPrecomputation().Save(GetAbstractGroupParameters().GetGroupPrecomputation(), storedPrecomputation);
|
|
}
|
|
|
|
// DL_Key
|
|
const DL_GroupParameters<Element> & GetAbstractGroupParameters() const {return this->GetGroupParameters();}
|
|
DL_GroupParameters<Element> & AccessAbstractGroupParameters() {return this->AccessGroupParameters();}
|
|
|
|
// DL_PublicKey
|
|
const DL_FixedBasePrecomputation<Element> & GetPublicPrecomputation() const {return m_ypc;}
|
|
DL_FixedBasePrecomputation<Element> & AccessPublicPrecomputation() {return m_ypc;}
|
|
|
|
// non-inherited
|
|
bool operator==(const DL_PublicKeyImpl<GP> &rhs) const
|
|
{return this->GetGroupParameters() == rhs.GetGroupParameters() && this->GetPublicElement() == rhs.GetPublicElement();}
|
|
|
|
private:
|
|
typename GP::BasePrecomputation m_ypc;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_ElgamalLikeSignatureAlgorithm
|
|
{
|
|
public:
|
|
virtual void Sign(const DL_GroupParameters<T> ¶ms, const Integer &privateKey, const Integer &k, const Integer &e, Integer &r, Integer &s) const =0;
|
|
virtual bool Verify(const DL_GroupParameters<T> ¶ms, const DL_PublicKey<T> &publicKey, const Integer &e, const Integer &r, const Integer &s) const =0;
|
|
virtual Integer RecoverPresignature(const DL_GroupParameters<T> ¶ms, const DL_PublicKey<T> &publicKey, const Integer &r, const Integer &s) const
|
|
{throw NotImplemented("DL_ElgamalLikeSignatureAlgorithm: this signature scheme does not support message recovery");}
|
|
virtual unsigned int RLen(const DL_GroupParameters<T> ¶ms) const
|
|
{return params.GetSubgroupOrder().ByteCount();}
|
|
virtual unsigned int SLen(const DL_GroupParameters<T> ¶ms) const
|
|
{return params.GetSubgroupOrder().ByteCount();}
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_KeyAgreementAlgorithm
|
|
{
|
|
public:
|
|
typedef T Element;
|
|
|
|
virtual Element AgreeWithEphemeralPrivateKey(const DL_GroupParameters<Element> ¶ms, const DL_FixedBasePrecomputation<Element> &publicPrecomputation, const Integer &privateExponent) const =0;
|
|
virtual Element AgreeWithStaticPrivateKey(const DL_GroupParameters<Element> ¶ms, const Element &publicElement, bool validateOtherPublicKey, const Integer &privateExponent) const =0;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_KeyDerivationAlgorithm
|
|
{
|
|
public:
|
|
virtual bool ParameterSupported(const char *name) const {return false;}
|
|
virtual void Derive(const DL_GroupParameters<T> &groupParams, byte *derivedKey, unsigned int derivedLength, const T &agreedElement, const T &ephemeralPublicKey, const NameValuePairs &derivationParams) const =0;
|
|
};
|
|
|
|
//! .
|
|
class CRYPTOPP_NO_VTABLE DL_SymmetricEncryptionAlgorithm
|
|
{
|
|
public:
|
|
virtual bool ParameterSupported(const char *name) const {return false;}
|
|
virtual unsigned int GetSymmetricKeyLength(unsigned int plaintextLength) const =0;
|
|
virtual unsigned int GetSymmetricCiphertextLength(unsigned int plaintextLength) const =0;
|
|
virtual unsigned int GetMaxSymmetricPlaintextLength(unsigned int ciphertextLength) const =0;
|
|
virtual void SymmetricEncrypt(RandomNumberGenerator &rng, const byte *key, const byte *plaintext, unsigned int plaintextLength, byte *ciphertext, const NameValuePairs ¶meters) const =0;
|
|
virtual DecodingResult SymmetricDecrypt(const byte *key, const byte *ciphertext, unsigned int ciphertextLength, byte *plaintext, const NameValuePairs ¶meters) const =0;
|
|
};
|
|
|
|
//! .
|
|
template <class KI>
|
|
class CRYPTOPP_NO_VTABLE DL_Base
|
|
{
|
|
protected:
|
|
typedef KI KeyInterface;
|
|
typedef typename KI::Element Element;
|
|
|
|
const DL_GroupParameters<Element> & GetAbstractGroupParameters() const {return GetKeyInterface().GetAbstractGroupParameters();}
|
|
DL_GroupParameters<Element> & AccessAbstractGroupParameters() {return AccessKeyInterface().AccessAbstractGroupParameters();}
|
|
|
|
virtual KeyInterface & AccessKeyInterface() =0;
|
|
virtual const KeyInterface & GetKeyInterface() const =0;
|
|
};
|
|
|
|
//! .
|
|
template <class INTERFACE, class KEY_INTERFACE>
|
|
class CRYPTOPP_NO_VTABLE DL_SignatureSchemeBase : public INTERFACE, public DL_Base<KEY_INTERFACE>
|
|
{
|
|
public:
|
|
unsigned int SignatureLength() const
|
|
{
|
|
return GetSignatureAlgorithm().RLen(this->GetAbstractGroupParameters())
|
|
+ GetSignatureAlgorithm().SLen(this->GetAbstractGroupParameters());
|
|
}
|
|
unsigned int MaxRecoverableLength() const
|
|
{return GetMessageEncodingInterface().MaxRecoverableLength(0, GetHashIdentifier().second, GetDigestSize());}
|
|
unsigned int MaxRecoverableLengthFromSignatureLength(unsigned int signatureLength) const
|
|
{assert(false); return 0;} // TODO
|
|
|
|
bool IsProbabilistic() const
|
|
{return true;}
|
|
bool AllowNonrecoverablePart() const
|
|
{return GetMessageEncodingInterface().AllowNonrecoverablePart();}
|
|
bool RecoverablePartFirst() const
|
|
{return GetMessageEncodingInterface().RecoverablePartFirst();}
|
|
|
|
protected:
|
|
unsigned int MessageRepresentativeLength() const {return BitsToBytes(MessageRepresentativeBitLength());}
|
|
unsigned int MessageRepresentativeBitLength() const {return this->GetAbstractGroupParameters().GetSubgroupOrder().BitCount();}
|
|
|
|
virtual const DL_ElgamalLikeSignatureAlgorithm<CPP_TYPENAME KEY_INTERFACE::Element> & GetSignatureAlgorithm() const =0;
|
|
virtual const PK_SignatureMessageEncodingMethod & GetMessageEncodingInterface() const =0;
|
|
virtual HashIdentifier GetHashIdentifier() const =0;
|
|
virtual unsigned int GetDigestSize() const =0;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_SignerBase : public DL_SignatureSchemeBase<PK_Signer, DL_PrivateKey<T> >
|
|
{
|
|
public:
|
|
// for validation testing
|
|
void RawSign(const Integer &k, const Integer &e, Integer &r, Integer &s) const
|
|
{
|
|
const DL_ElgamalLikeSignatureAlgorithm<T> &alg = this->GetSignatureAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
const DL_PrivateKey<T> &key = this->GetKeyInterface();
|
|
|
|
r = params.ConvertElementToInteger(params.ExponentiateBase(k));
|
|
alg.Sign(params, key.GetPrivateExponent(), k, e, r, s);
|
|
}
|
|
|
|
void InputRecoverableMessage(PK_MessageAccumulator &messageAccumulator, const byte *recoverableMessage, unsigned int recoverableMessageLength) const
|
|
{
|
|
PK_MessageAccumulatorBase &ma = static_cast<PK_MessageAccumulatorBase &>(messageAccumulator);
|
|
ma.m_recoverableMessage.Assign(recoverableMessage, recoverableMessageLength);
|
|
this->GetMessageEncodingInterface().ProcessRecoverableMessage(ma.AccessHash(),
|
|
recoverableMessage, recoverableMessageLength,
|
|
ma.m_presignature, ma.m_presignature.size(),
|
|
ma.m_semisignature);
|
|
}
|
|
|
|
unsigned int SignAndRestart(RandomNumberGenerator &rng, PK_MessageAccumulator &messageAccumulator, byte *signature, bool restart) const
|
|
{
|
|
this->GetMaterial().DoQuickSanityCheck();
|
|
|
|
PK_MessageAccumulatorBase &ma = static_cast<PK_MessageAccumulatorBase &>(messageAccumulator);
|
|
const DL_ElgamalLikeSignatureAlgorithm<T> &alg = this->GetSignatureAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
const DL_PrivateKey<T> &key = this->GetKeyInterface();
|
|
|
|
SecByteBlock representative(this->MessageRepresentativeLength());
|
|
this->GetMessageEncodingInterface().ComputeMessageRepresentative(
|
|
rng,
|
|
ma.m_recoverableMessage, ma.m_recoverableMessage.size(),
|
|
ma.AccessHash(), this->GetHashIdentifier(), ma.m_empty,
|
|
representative, this->MessageRepresentativeBitLength());
|
|
ma.m_empty = true;
|
|
Integer e(representative, representative.size());
|
|
|
|
Integer r;
|
|
if (this->MaxRecoverableLength() > 0)
|
|
r.Decode(ma.m_semisignature, ma.m_semisignature.size());
|
|
else
|
|
r.Decode(ma.m_presignature, ma.m_presignature.size());
|
|
Integer s;
|
|
alg.Sign(params, key.GetPrivateExponent(), ma.m_k, e, r, s);
|
|
|
|
unsigned int rLen = alg.RLen(params);
|
|
r.Encode(signature, rLen);
|
|
s.Encode(signature+rLen, alg.SLen(params));
|
|
|
|
if (restart)
|
|
RestartMessageAccumulator(rng, ma);
|
|
|
|
return this->SignatureLength();
|
|
}
|
|
|
|
protected:
|
|
void RestartMessageAccumulator(RandomNumberGenerator &rng, PK_MessageAccumulatorBase &ma) const
|
|
{
|
|
const DL_ElgamalLikeSignatureAlgorithm<T> &alg = this->GetSignatureAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
ma.m_k.Randomize(rng, 1, params.GetSubgroupOrder()-1);
|
|
ma.m_presignature.New(params.GetEncodedElementSize(false));
|
|
params.ConvertElementToInteger(params.ExponentiateBase(ma.m_k)).Encode(ma.m_presignature, ma.m_presignature.size());
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_VerifierBase : public DL_SignatureSchemeBase<PK_Verifier, DL_PublicKey<T> >
|
|
{
|
|
public:
|
|
void InputSignature(PK_MessageAccumulator &messageAccumulator, const byte *signature, unsigned int signatureLength) const
|
|
{
|
|
PK_MessageAccumulatorBase &ma = static_cast<PK_MessageAccumulatorBase &>(messageAccumulator);
|
|
const DL_ElgamalLikeSignatureAlgorithm<T> &alg = this->GetSignatureAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
|
|
unsigned int rLen = alg.RLen(params);
|
|
ma.m_semisignature.Assign(signature, rLen);
|
|
ma.m_s.Decode(signature+rLen, alg.SLen(params));
|
|
|
|
this->GetMessageEncodingInterface().ProcessSemisignature(ma.AccessHash(), ma.m_semisignature, ma.m_semisignature.size());
|
|
}
|
|
|
|
bool VerifyAndRestart(PK_MessageAccumulator &messageAccumulator) const
|
|
{
|
|
this->GetMaterial().DoQuickSanityCheck();
|
|
|
|
PK_MessageAccumulatorBase &ma = static_cast<PK_MessageAccumulatorBase &>(messageAccumulator);
|
|
const DL_ElgamalLikeSignatureAlgorithm<T> &alg = this->GetSignatureAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
const DL_PublicKey<T> &key = this->GetKeyInterface();
|
|
|
|
SecByteBlock representative(this->MessageRepresentativeLength());
|
|
this->GetMessageEncodingInterface().ComputeMessageRepresentative(NullRNG(), ma.m_recoverableMessage, ma.m_recoverableMessage.size(),
|
|
ma.AccessHash(), this->GetHashIdentifier(), ma.m_empty,
|
|
representative, this->MessageRepresentativeBitLength());
|
|
ma.m_empty = true;
|
|
Integer e(representative, representative.size());
|
|
|
|
Integer r(ma.m_semisignature, ma.m_semisignature.size());
|
|
return alg.Verify(params, key, e, r, ma.m_s);
|
|
}
|
|
|
|
DecodingResult RecoverAndRestart(byte *recoveredMessage, PK_MessageAccumulator &messageAccumulator) const
|
|
{
|
|
this->GetMaterial().DoQuickSanityCheck();
|
|
|
|
PK_MessageAccumulatorBase &ma = static_cast<PK_MessageAccumulatorBase &>(messageAccumulator);
|
|
const DL_ElgamalLikeSignatureAlgorithm<T> &alg = this->GetSignatureAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
const DL_PublicKey<T> &key = this->GetKeyInterface();
|
|
|
|
SecByteBlock representative(this->MessageRepresentativeLength());
|
|
this->GetMessageEncodingInterface().ComputeMessageRepresentative(
|
|
NullRNG(),
|
|
ma.m_recoverableMessage, ma.m_recoverableMessage.size(),
|
|
ma.AccessHash(), this->GetHashIdentifier(), ma.m_empty,
|
|
representative, this->MessageRepresentativeBitLength());
|
|
ma.m_empty = true;
|
|
Integer e(representative, representative.size());
|
|
|
|
ma.m_presignature.New(params.GetEncodedElementSize(false));
|
|
Integer r(ma.m_semisignature, ma.m_semisignature.size());
|
|
alg.RecoverPresignature(params, key, r, ma.m_s).Encode(ma.m_presignature, ma.m_presignature.size());
|
|
|
|
return this->GetMessageEncodingInterface().RecoverMessageFromSemisignature(
|
|
ma.AccessHash(), this->GetHashIdentifier(),
|
|
ma.m_presignature, ma.m_presignature.size(),
|
|
ma.m_semisignature, ma.m_semisignature.size(),
|
|
recoveredMessage);
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class PK, class KI>
|
|
class CRYPTOPP_NO_VTABLE DL_CryptoSystemBase : public PK, public DL_Base<KI>
|
|
{
|
|
public:
|
|
typedef typename DL_Base<KI>::Element Element;
|
|
|
|
unsigned int MaxPlaintextLength(unsigned int ciphertextLength) const
|
|
{
|
|
unsigned int minLen = this->GetAbstractGroupParameters().GetEncodedElementSize(true);
|
|
return ciphertextLength < minLen ? 0 : GetSymmetricEncryptionAlgorithm().GetMaxSymmetricPlaintextLength(ciphertextLength - minLen);
|
|
}
|
|
|
|
unsigned int CiphertextLength(unsigned int plaintextLength) const
|
|
{
|
|
unsigned int len = GetSymmetricEncryptionAlgorithm().GetSymmetricCiphertextLength(plaintextLength);
|
|
return len == 0 ? 0 : this->GetAbstractGroupParameters().GetEncodedElementSize(true) + len;
|
|
}
|
|
|
|
bool ParameterSupported(const char *name) const
|
|
{return GetKeyDerivationAlgorithm().ParameterSupported(name) || GetSymmetricEncryptionAlgorithm().ParameterSupported(name);}
|
|
|
|
protected:
|
|
virtual const DL_KeyAgreementAlgorithm<Element> & GetKeyAgreementAlgorithm() const =0;
|
|
virtual const DL_KeyDerivationAlgorithm<Element> & GetKeyDerivationAlgorithm() const =0;
|
|
virtual const DL_SymmetricEncryptionAlgorithm & GetSymmetricEncryptionAlgorithm() const =0;
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_DecryptorBase : public DL_CryptoSystemBase<PK_Decryptor, DL_PrivateKey<T> >
|
|
{
|
|
public:
|
|
typedef T Element;
|
|
|
|
DecodingResult Decrypt(RandomNumberGenerator &rng, const byte *ciphertext, unsigned int ciphertextLength, byte *plaintext, const NameValuePairs ¶meters = g_nullNameValuePairs) const
|
|
{
|
|
try
|
|
{
|
|
const DL_KeyAgreementAlgorithm<T> &agreeAlg = this->GetKeyAgreementAlgorithm();
|
|
const DL_KeyDerivationAlgorithm<T> &derivAlg = this->GetKeyDerivationAlgorithm();
|
|
const DL_SymmetricEncryptionAlgorithm &encAlg = this->GetSymmetricEncryptionAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
const DL_PrivateKey<T> &key = this->GetKeyInterface();
|
|
|
|
Element q = params.DecodeElement(ciphertext, true);
|
|
unsigned int elementSize = params.GetEncodedElementSize(true);
|
|
ciphertext += elementSize;
|
|
ciphertextLength -= elementSize;
|
|
|
|
Element z = agreeAlg.AgreeWithStaticPrivateKey(params, q, true, key.GetPrivateExponent());
|
|
|
|
SecByteBlock derivedKey(encAlg.GetSymmetricKeyLength(encAlg.GetMaxSymmetricPlaintextLength(ciphertextLength)));
|
|
derivAlg.Derive(params, derivedKey, derivedKey.size(), z, q, parameters);
|
|
|
|
return encAlg.SymmetricDecrypt(derivedKey, ciphertext, ciphertextLength, plaintext, parameters);
|
|
}
|
|
catch (DL_BadElement &)
|
|
{
|
|
return DecodingResult();
|
|
}
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_EncryptorBase : public DL_CryptoSystemBase<PK_Encryptor, DL_PublicKey<T> >
|
|
{
|
|
public:
|
|
typedef T Element;
|
|
|
|
void Encrypt(RandomNumberGenerator &rng, const byte *plaintext, unsigned int plaintextLength, byte *ciphertext, const NameValuePairs ¶meters = g_nullNameValuePairs) const
|
|
{
|
|
const DL_KeyAgreementAlgorithm<T> &agreeAlg = this->GetKeyAgreementAlgorithm();
|
|
const DL_KeyDerivationAlgorithm<T> &derivAlg = this->GetKeyDerivationAlgorithm();
|
|
const DL_SymmetricEncryptionAlgorithm &encAlg = this->GetSymmetricEncryptionAlgorithm();
|
|
const DL_GroupParameters<T> ¶ms = this->GetAbstractGroupParameters();
|
|
const DL_PublicKey<T> &key = this->GetKeyInterface();
|
|
|
|
Integer x(rng, Integer::One(), params.GetMaxExponent());
|
|
Element q = params.ExponentiateBase(x);
|
|
params.EncodeElement(true, q, ciphertext);
|
|
unsigned int elementSize = params.GetEncodedElementSize(true);
|
|
ciphertext += elementSize;
|
|
|
|
Element z = agreeAlg.AgreeWithEphemeralPrivateKey(params, key.GetPublicPrecomputation(), x);
|
|
|
|
SecByteBlock derivedKey(encAlg.GetSymmetricKeyLength(plaintextLength));
|
|
derivAlg.Derive(params, derivedKey, derivedKey.size(), z, q, parameters);
|
|
|
|
encAlg.SymmetricEncrypt(rng, derivedKey, plaintext, plaintextLength, ciphertext, parameters);
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class T1, class T2>
|
|
struct DL_SchemeOptionsBase
|
|
{
|
|
typedef T1 AlgorithmInfo;
|
|
typedef T2 GroupParameters;
|
|
typedef typename GroupParameters::Element Element;
|
|
};
|
|
|
|
//! .
|
|
template <class T1, class T2>
|
|
struct DL_KeyedSchemeOptions : public DL_SchemeOptionsBase<T1, typename T2::PublicKey::GroupParameters>
|
|
{
|
|
typedef T2 Keys;
|
|
typedef typename Keys::PrivateKey PrivateKey;
|
|
typedef typename Keys::PublicKey PublicKey;
|
|
};
|
|
|
|
//! .
|
|
template <class T1, class T2, class T3, class T4, class T5>
|
|
struct DL_SignatureSchemeOptions : public DL_KeyedSchemeOptions<T1, T2>
|
|
{
|
|
typedef T3 SignatureAlgorithm;
|
|
typedef T4 MessageEncodingMethod;
|
|
typedef T5 HashFunction;
|
|
};
|
|
|
|
//! .
|
|
template <class T1, class T2, class T3, class T4, class T5>
|
|
struct DL_CryptoSchemeOptions : public DL_KeyedSchemeOptions<T1, T2>
|
|
{
|
|
typedef T3 KeyAgreementAlgorithm;
|
|
typedef T4 KeyDerivationAlgorithm;
|
|
typedef T5 SymmetricEncryptionAlgorithm;
|
|
};
|
|
|
|
//! .
|
|
template <class BASE, class SCHEME_OPTIONS, class KEY>
|
|
class CRYPTOPP_NO_VTABLE DL_ObjectImplBase : public AlgorithmImpl<BASE, typename SCHEME_OPTIONS::AlgorithmInfo>
|
|
{
|
|
public:
|
|
typedef SCHEME_OPTIONS SchemeOptions;
|
|
typedef typename KEY::Element Element;
|
|
|
|
PrivateKey & AccessPrivateKey() {return m_key;}
|
|
PublicKey & AccessPublicKey() {return m_key;}
|
|
|
|
// KeyAccessor
|
|
const KEY & GetKey() const {return m_key;}
|
|
KEY & AccessKey() {return m_key;}
|
|
|
|
protected:
|
|
typename BASE::KeyInterface & AccessKeyInterface() {return m_key;}
|
|
const typename BASE::KeyInterface & GetKeyInterface() const {return m_key;}
|
|
|
|
// for signature scheme
|
|
HashIdentifier GetHashIdentifier() const
|
|
{
|
|
typedef typename SchemeOptions::MessageEncodingMethod::HashIdentifierLookup HashLookup;
|
|
return HashLookup::template HashIdentifierLookup2<CPP_TYPENAME SchemeOptions::HashFunction>::Lookup();
|
|
}
|
|
unsigned int GetDigestSize() const
|
|
{
|
|
typedef CPP_TYPENAME SchemeOptions::HashFunction H;
|
|
return H::DIGESTSIZE;
|
|
}
|
|
|
|
private:
|
|
KEY m_key;
|
|
};
|
|
|
|
//! .
|
|
template <class BASE, class SCHEME_OPTIONS, class KEY>
|
|
class CRYPTOPP_NO_VTABLE DL_ObjectImpl : public DL_ObjectImplBase<BASE, SCHEME_OPTIONS, KEY>
|
|
{
|
|
public:
|
|
typedef typename KEY::Element Element;
|
|
|
|
protected:
|
|
const DL_ElgamalLikeSignatureAlgorithm<Element> & GetSignatureAlgorithm() const
|
|
{return Singleton<CPP_TYPENAME SCHEME_OPTIONS::SignatureAlgorithm>().Ref();}
|
|
const DL_KeyAgreementAlgorithm<Element> & GetKeyAgreementAlgorithm() const
|
|
{return Singleton<CPP_TYPENAME SCHEME_OPTIONS::KeyAgreementAlgorithm>().Ref();}
|
|
const DL_KeyDerivationAlgorithm<Element> & GetKeyDerivationAlgorithm() const
|
|
{return Singleton<CPP_TYPENAME SCHEME_OPTIONS::KeyDerivationAlgorithm>().Ref();}
|
|
const DL_SymmetricEncryptionAlgorithm & GetSymmetricEncryptionAlgorithm() const
|
|
{return Singleton<CPP_TYPENAME SCHEME_OPTIONS::SymmetricEncryptionAlgorithm>().Ref();}
|
|
HashIdentifier GetHashIdentifier() const
|
|
{return HashIdentifier();}
|
|
const PK_SignatureMessageEncodingMethod & GetMessageEncodingInterface() const
|
|
{return Singleton<CPP_TYPENAME SCHEME_OPTIONS::MessageEncodingMethod>().Ref();}
|
|
};
|
|
|
|
//! .
|
|
template <class BASE, class SCHEME_OPTIONS>
|
|
class CRYPTOPP_NO_VTABLE DL_PublicObjectImpl : public DL_ObjectImpl<BASE, SCHEME_OPTIONS, typename SCHEME_OPTIONS::PublicKey>, public PublicKeyCopier<SCHEME_OPTIONS>
|
|
{
|
|
public:
|
|
void CopyKeyInto(typename SCHEME_OPTIONS::PublicKey &key) const
|
|
{key = this->GetKey();}
|
|
};
|
|
|
|
//! .
|
|
template <class BASE, class SCHEME_OPTIONS>
|
|
class CRYPTOPP_NO_VTABLE DL_PrivateObjectImpl : public DL_ObjectImpl<BASE, SCHEME_OPTIONS, typename SCHEME_OPTIONS::PrivateKey>, public PrivateKeyCopier<SCHEME_OPTIONS>
|
|
{
|
|
public:
|
|
void CopyKeyInto(typename SCHEME_OPTIONS::PublicKey &key) const
|
|
{this->GetKey().MakePublicKey(key);}
|
|
void CopyKeyInto(typename SCHEME_OPTIONS::PrivateKey &key) const
|
|
{key = this->GetKey();}
|
|
};
|
|
|
|
//! .
|
|
template <class SCHEME_OPTIONS>
|
|
class DL_SignerImpl : public DL_PrivateObjectImpl<DL_SignerBase<typename SCHEME_OPTIONS::Element>, SCHEME_OPTIONS>
|
|
{
|
|
public:
|
|
PK_MessageAccumulator * NewSignatureAccumulator(RandomNumberGenerator &rng) const
|
|
{
|
|
std::auto_ptr<PK_MessageAccumulatorBase> p(new PK_MessageAccumulatorImpl<CPP_TYPENAME SCHEME_OPTIONS::HashFunction>);
|
|
this->RestartMessageAccumulator(rng, *p);
|
|
return p.release();
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class SCHEME_OPTIONS>
|
|
class DL_VerifierImpl : public DL_PublicObjectImpl<DL_VerifierBase<typename SCHEME_OPTIONS::Element>, SCHEME_OPTIONS>
|
|
{
|
|
public:
|
|
PK_MessageAccumulator * NewVerificationAccumulator() const
|
|
{
|
|
return new PK_MessageAccumulatorImpl<CPP_TYPENAME SCHEME_OPTIONS::HashFunction>;
|
|
}
|
|
};
|
|
|
|
//! .
|
|
template <class SCHEME_OPTIONS>
|
|
class DL_EncryptorImpl : public DL_PublicObjectImpl<DL_EncryptorBase<typename SCHEME_OPTIONS::Element>, SCHEME_OPTIONS>
|
|
{
|
|
};
|
|
|
|
//! .
|
|
template <class SCHEME_OPTIONS>
|
|
class DL_DecryptorImpl : public DL_PrivateObjectImpl<DL_DecryptorBase<typename SCHEME_OPTIONS::Element>, SCHEME_OPTIONS>
|
|
{
|
|
};
|
|
|
|
// ********************************************************
|
|
|
|
//! .
|
|
template <class T>
|
|
class CRYPTOPP_NO_VTABLE DL_SimpleKeyAgreementDomainBase : public SimpleKeyAgreementDomain
|
|
{
|
|
public:
|
|
typedef T Element;
|
|
|
|
CryptoParameters & AccessCryptoParameters() {return AccessAbstractGroupParameters();}
|
|
unsigned int AgreedValueLength() const {return GetAbstractGroupParameters().GetEncodedElementSize(false);}
|
|
unsigned int PrivateKeyLength() const {return GetAbstractGroupParameters().GetSubgroupOrder().ByteCount();}
|
|
unsigned int PublicKeyLength() const {return GetAbstractGroupParameters().GetEncodedElementSize(true);}
|
|
|
|
void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const
|
|
{
|
|
Integer x(rng, Integer::One(), GetAbstractGroupParameters().GetMaxExponent());
|
|
x.Encode(privateKey, PrivateKeyLength());
|
|
}
|
|
|
|
void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const
|
|
{
|
|
const DL_GroupParameters<T> ¶ms = GetAbstractGroupParameters();
|
|
Integer x(privateKey, PrivateKeyLength());
|
|
Element y = params.ExponentiateBase(x);
|
|
params.EncodeElement(true, y, publicKey);
|
|
}
|
|
|
|
bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const
|
|
{
|
|
try
|
|
{
|
|
const DL_GroupParameters<T> ¶ms = GetAbstractGroupParameters();
|
|
Integer x(privateKey, PrivateKeyLength());
|
|
Element w = params.DecodeElement(otherPublicKey, validateOtherPublicKey);
|
|
|
|
Element z = GetKeyAgreementAlgorithm().AgreeWithStaticPrivateKey(
|
|
GetAbstractGroupParameters(), w, validateOtherPublicKey, x);
|
|
params.EncodeElement(false, z, agreedValue);
|
|
}
|
|
catch (DL_BadElement &)
|
|
{
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
const Element &GetGenerator() const {return GetAbstractGroupParameters().GetSubgroupGenerator();}
|
|
|
|
protected:
|
|
virtual const DL_KeyAgreementAlgorithm<Element> & GetKeyAgreementAlgorithm() const =0;
|
|
virtual DL_GroupParameters<Element> & AccessAbstractGroupParameters() =0;
|
|
const DL_GroupParameters<Element> & GetAbstractGroupParameters() const {return const_cast<DL_SimpleKeyAgreementDomainBase<Element> *>(this)->AccessAbstractGroupParameters();}
|
|
};
|
|
|
|
enum CofactorMultiplicationOption {NO_COFACTOR_MULTIPLICTION, COMPATIBLE_COFACTOR_MULTIPLICTION, INCOMPATIBLE_COFACTOR_MULTIPLICTION};
|
|
typedef EnumToType<CofactorMultiplicationOption, NO_COFACTOR_MULTIPLICTION> NoCofactorMultiplication;
|
|
typedef EnumToType<CofactorMultiplicationOption, COMPATIBLE_COFACTOR_MULTIPLICTION> CompatibleCofactorMultiplication;
|
|
typedef EnumToType<CofactorMultiplicationOption, INCOMPATIBLE_COFACTOR_MULTIPLICTION> IncompatibleCofactorMultiplication;
|
|
|
|
//! DH key agreement algorithm
|
|
template <class ELEMENT, class COFACTOR_OPTION>
|
|
class DL_KeyAgreementAlgorithm_DH : public DL_KeyAgreementAlgorithm<ELEMENT>
|
|
{
|
|
public:
|
|
typedef ELEMENT Element;
|
|
|
|
static const char *StaticAlgorithmName()
|
|
{return COFACTOR_OPTION::ToEnum() == NO_COFACTOR_MULTIPLICTION ? "DH" : "DHC";}
|
|
|
|
Element AgreeWithEphemeralPrivateKey(const DL_GroupParameters<Element> ¶ms, const DL_FixedBasePrecomputation<Element> &publicPrecomputation, const Integer &privateExponent) const
|
|
{
|
|
return publicPrecomputation.Exponentiate(params.GetGroupPrecomputation(),
|
|
COFACTOR_OPTION::ToEnum() == INCOMPATIBLE_COFACTOR_MULTIPLICTION ? privateExponent*params.GetCofactor() : privateExponent);
|
|
}
|
|
|
|
Element AgreeWithStaticPrivateKey(const DL_GroupParameters<Element> ¶ms, const Element &publicElement, bool validateOtherPublicKey, const Integer &privateExponent) const
|
|
{
|
|
if (COFACTOR_OPTION::ToEnum() == COMPATIBLE_COFACTOR_MULTIPLICTION)
|
|
{
|
|
const Integer &k = params.GetCofactor();
|
|
return params.ExponentiateElement(publicElement,
|
|
ModularArithmetic(params.GetSubgroupOrder()).Divide(privateExponent, k)*k);
|
|
}
|
|
else if (COFACTOR_OPTION::ToEnum() == INCOMPATIBLE_COFACTOR_MULTIPLICTION)
|
|
return params.ExponentiateElement(publicElement, privateExponent*params.GetCofactor());
|
|
else
|
|
{
|
|
assert(COFACTOR_OPTION::ToEnum() == NO_COFACTOR_MULTIPLICTION);
|
|
|
|
if (!validateOtherPublicKey)
|
|
return params.ExponentiateElement(publicElement, privateExponent);
|
|
|
|
if (params.FastSubgroupCheckAvailable())
|
|
{
|
|
if (!params.ValidateElement(2, publicElement, NULL))
|
|
throw DL_BadElement();
|
|
return params.ExponentiateElement(publicElement, privateExponent);
|
|
}
|
|
else
|
|
{
|
|
const Integer e[2] = {params.GetSubgroupOrder(), privateExponent};
|
|
Element r[2];
|
|
params.SimultaneousExponentiate(r, publicElement, e, 2);
|
|
if (!params.IsIdentity(r[0]))
|
|
throw DL_BadElement();
|
|
return r[1];
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
// ********************************************************
|
|
|
|
//! A template implementing constructors for public key algorithm classes
|
|
template <class BASE>
|
|
class CRYPTOPP_NO_VTABLE PK_FinalTemplate : public BASE
|
|
{
|
|
public:
|
|
PK_FinalTemplate() {}
|
|
|
|
PK_FinalTemplate(const Integer &v1)
|
|
{this->AccessKey().Initialize(v1);}
|
|
|
|
PK_FinalTemplate(const typename BASE::KeyClass &key) {this->AccessKey().operator=(key);}
|
|
|
|
template <class T>
|
|
PK_FinalTemplate(const PublicKeyCopier<T> &key)
|
|
{key.CopyKeyInto(this->AccessKey());}
|
|
|
|
template <class T>
|
|
PK_FinalTemplate(const PrivateKeyCopier<T> &key)
|
|
{key.CopyKeyInto(this->AccessKey());}
|
|
|
|
PK_FinalTemplate(BufferedTransformation &bt) {this->AccessKey().BERDecode(bt);}
|
|
|
|
#if (defined(_MSC_VER) && _MSC_VER < 1300)
|
|
|
|
template <class T1, class T2>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2)
|
|
{this->AccessKey().Initialize(v1, v2);}
|
|
|
|
template <class T1, class T2, class T3>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2, T3 &v3)
|
|
{this->AccessKey().Initialize(v1, v2, v3);}
|
|
|
|
template <class T1, class T2, class T3, class T4>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2, T3 &v3, T4 &v4)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5, T6 &v6)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6, class T7>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5, T6 &v6, T7 &v7)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6, v7);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8>
|
|
PK_FinalTemplate(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5, T6 &v6, T7 &v7, T8 &v8)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6, v7, v8);}
|
|
|
|
#else
|
|
|
|
template <class T1, class T2>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2)
|
|
{this->AccessKey().Initialize(v1, v2);}
|
|
|
|
template <class T1, class T2, class T3>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2, const T3 &v3)
|
|
{this->AccessKey().Initialize(v1, v2, v3);}
|
|
|
|
template <class T1, class T2, class T3, class T4>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5, const T6 &v6)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6, class T7>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5, const T6 &v6, const T7 &v7)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6, v7);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8>
|
|
PK_FinalTemplate(const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5, const T6 &v6, const T7 &v7, const T8 &v8)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6, v7, v8);}
|
|
|
|
template <class T1, class T2>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2)
|
|
{this->AccessKey().Initialize(v1, v2);}
|
|
|
|
template <class T1, class T2, class T3>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2, const T3 &v3)
|
|
{this->AccessKey().Initialize(v1, v2, v3);}
|
|
|
|
template <class T1, class T2, class T3, class T4>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5, const T6 &v6)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6, class T7>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5, const T6 &v6, const T7 &v7)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6, v7);}
|
|
|
|
template <class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8>
|
|
PK_FinalTemplate(T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5, const T6 &v6, const T7 &v7, const T8 &v8)
|
|
{this->AccessKey().Initialize(v1, v2, v3, v4, v5, v6, v7, v8);}
|
|
|
|
#endif
|
|
};
|
|
|
|
//! Base class for public key encryption standard classes. These classes are used to select from variants of algorithms. Note that not all standards apply to all algorithms.
|
|
struct EncryptionStandard {};
|
|
|
|
//! Base class for public key signature standard classes. These classes are used to select from variants of algorithms. Note that not all standards apply to all algorithms.
|
|
struct SignatureStandard {};
|
|
|
|
template <class STANDARD, class KEYS, class ALG_INFO>
|
|
class TF_ES;
|
|
|
|
//! Trapdoor Function Based Encryption Scheme
|
|
template <class STANDARD, class KEYS, class ALG_INFO = TF_ES<STANDARD, KEYS, int> >
|
|
class TF_ES : public KEYS
|
|
{
|
|
typedef typename STANDARD::EncryptionMessageEncodingMethod MessageEncodingMethod;
|
|
|
|
public:
|
|
//! see EncryptionStandard for a list of standards
|
|
typedef STANDARD Standard;
|
|
typedef TF_CryptoSchemeOptions<ALG_INFO, KEYS, MessageEncodingMethod> SchemeOptions;
|
|
|
|
static std::string StaticAlgorithmName() {return KEYS::StaticAlgorithmName() + "/" + MessageEncodingMethod::StaticAlgorithmName();}
|
|
|
|
//! implements PK_Decryptor interface
|
|
typedef PK_FinalTemplate<TF_DecryptorImpl<SchemeOptions> > Decryptor;
|
|
//! implements PK_Encryptor interface
|
|
typedef PK_FinalTemplate<TF_EncryptorImpl<SchemeOptions> > Encryptor;
|
|
};
|
|
|
|
template <class STANDARD, class H, class KEYS, class ALG_INFO> // VC60 workaround: doesn't work if KEYS is first parameter
|
|
class TF_SS;
|
|
|
|
//! Trapdoor Function Based Signature Scheme
|
|
template <class STANDARD, class H, class KEYS, class ALG_INFO = TF_SS<STANDARD, H, KEYS, int> > // VC60 workaround: doesn't work if KEYS is first parameter
|
|
class TF_SS : public KEYS
|
|
{
|
|
public:
|
|
//! see SignatureStandard for a list of standards
|
|
typedef STANDARD Standard;
|
|
typedef typename Standard::SignatureMessageEncodingMethod MessageEncodingMethod;
|
|
typedef TF_SignatureSchemeOptions<ALG_INFO, KEYS, MessageEncodingMethod, H> SchemeOptions;
|
|
|
|
static std::string StaticAlgorithmName() {return KEYS::StaticAlgorithmName() + "/" + MessageEncodingMethod::StaticAlgorithmName() + "(" + H::StaticAlgorithmName() + ")";}
|
|
|
|
//! implements PK_Signer interface
|
|
typedef PK_FinalTemplate<TF_SignerImpl<SchemeOptions> > Signer;
|
|
//! implements PK_Verifier interface
|
|
typedef PK_FinalTemplate<TF_VerifierImpl<SchemeOptions> > Verifier;
|
|
};
|
|
|
|
template <class KEYS, class SA, class MEM, class H, class ALG_INFO>
|
|
class DL_SS;
|
|
|
|
//! Discrete Log Based Signature Scheme
|
|
template <class KEYS, class SA, class MEM, class H, class ALG_INFO = DL_SS<KEYS, SA, MEM, H, int> >
|
|
class DL_SS : public KEYS
|
|
{
|
|
typedef DL_SignatureSchemeOptions<ALG_INFO, KEYS, SA, MEM, H> SchemeOptions;
|
|
|
|
public:
|
|
static std::string StaticAlgorithmName() {return SA::StaticAlgorithmName() + std::string("/EMSA1(") + H::StaticAlgorithmName() + ")";}
|
|
|
|
//! implements PK_Signer interface
|
|
typedef PK_FinalTemplate<DL_SignerImpl<SchemeOptions> > Signer;
|
|
//! implements PK_Verifier interface
|
|
typedef PK_FinalTemplate<DL_VerifierImpl<SchemeOptions> > Verifier;
|
|
};
|
|
|
|
//! Discrete Log Based Encryption Scheme
|
|
template <class KEYS, class AA, class DA, class EA, class ALG_INFO>
|
|
class DL_ES : public KEYS
|
|
{
|
|
typedef DL_CryptoSchemeOptions<ALG_INFO, KEYS, AA, DA, EA> SchemeOptions;
|
|
|
|
public:
|
|
//! implements PK_Decryptor interface
|
|
typedef PK_FinalTemplate<DL_DecryptorImpl<SchemeOptions> > Decryptor;
|
|
//! implements PK_Encryptor interface
|
|
typedef PK_FinalTemplate<DL_EncryptorImpl<SchemeOptions> > Encryptor;
|
|
};
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif
|