pssr.h
#ifndef CRYPTOPP_PSSR_H
#define CRYPTOPP_PSSR_H
#include "pubkey.h"
#include "emsa2.h"
#ifdef CRYPTOPP_IS_DLL
#include "sha.h"
#endif
NAMESPACE_BEGIN(CryptoPP)
class CRYPTOPP_DLL PSSR_MEM_Base : public PK_RecoverableSignatureMessageEncodingMethod
{
virtual bool AllowRecovery() const =0;
virtual size_t SaltLen(size_t hashLen) const =0;
virtual size_t MinPadLen(size_t hashLen) const =0;
virtual const MaskGeneratingFunction & GetMGF() const =0;
public:
size_t MinRepresentativeBitLength(size_t hashIdentifierLength, size_t digestLength) const;
size_t MaxRecoverableLength(size_t representativeBitLength, size_t hashIdentifierLength, size_t digestLength) const;
bool IsProbabilistic() const;
bool AllowNonrecoverablePart() const;
bool RecoverablePartFirst() const;
void ComputeMessageRepresentative(RandomNumberGenerator &rng,
const byte *recoverableMessage, size_t recoverableMessageLength,
HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
byte *representative, size_t representativeBitLength) const;
DecodingResult RecoverMessageFromRepresentative(
HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
byte *representative, size_t representativeBitLength,
byte *recoverableMessage) const;
};
template <bool USE_HASH_ID> class PSSR_MEM_BaseWithHashId;
template<> class PSSR_MEM_BaseWithHashId<true> : public EMSA2HashIdLookup<PSSR_MEM_Base> {};
template<> class PSSR_MEM_BaseWithHashId<false> : public PSSR_MEM_Base {};
template <bool ALLOW_RECOVERY, class MGF=P1363_MGF1, int SALT_LEN=-1, int MIN_PAD_LEN=0, bool USE_HASH_ID=false>
class PSSR_MEM : public PSSR_MEM_BaseWithHashId<USE_HASH_ID>
{
virtual bool AllowRecovery() const {return ALLOW_RECOVERY;}
virtual size_t SaltLen(size_t hashLen) const {return SALT_LEN < 0 ? hashLen : SALT_LEN;}
virtual size_t MinPadLen(size_t hashLen) const {return MIN_PAD_LEN < 0 ? hashLen : MIN_PAD_LEN;}
virtual const MaskGeneratingFunction & GetMGF() const {static MGF mgf; return mgf;}
public:
static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string(ALLOW_RECOVERY ? "PSSR-" : "PSS-") + MGF::StaticAlgorithmName();}
};
//! <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PSSR-MGF1">PSSR-MGF1</a>
struct PSSR : public SignatureStandard
{
typedef PSSR_MEM<true> SignatureMessageEncodingMethod;
};
//! <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PSS-MGF1">PSS-MGF1</a>
struct PSS : public SignatureStandard
{
typedef PSSR_MEM<false> SignatureMessageEncodingMethod;
};
NAMESPACE_END
#endif
emsa2.h
This file contains various padding schemes for public key algorithms.
pubkey.h
This file contains helper classes/functions for implementing public key algorithms.
RandomNumberGenerator
interface for random number generators
Definition: cryptlib.h:668
PSSR_MEM_Base
Definition: pssr.h:13
SignatureStandard
Base class for public key signature standard classes. These classes are used to select from variants ...
Definition: pubkey.h:1600
DecodingResult
used to return decoding results
Definition: cryptlib.h:197
P1363_MGF1
_
Definition: pubkey.h:486
PSSR_MEM_BaseWithHashId
Definition: pssr.h:36
MaskGeneratingFunction
_
Definition: pubkey.h:476
EMSA2HashIdLookup
Definition: emsa2.h:24
PSSR
PSSR-MGF1
Definition: pssr.h:53
HashTransformation
interface for hash functions and data processing part of MACs
Definition: cryptlib.h:530
PSSR_MEM
Definition: pssr.h:41
PK_RecoverableSignatureMessageEncodingMethod
Definition: pubkey.h:257
PSS
PSS-MGF1
Definition: pssr.h:59