mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-23 18:09:48 +00:00
92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
#ifndef CRYPTOPP_PSSR_H
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#define CRYPTOPP_PSSR_H
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#include "pubkey.h"
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#include <functional>
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NAMESPACE_BEGIN(CryptoPP)
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class PSSR_MEM_Base : public PK_RecoverableSignatureMessageEncodingMethod
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{
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virtual bool AllowRecovery() const =0;
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virtual unsigned int SaltLen(unsigned int hashLen) const =0;
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virtual unsigned int MinPadLen(unsigned int hashLen) const =0;
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virtual const MaskGeneratingFunction & GetMGF() const =0;
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public:
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unsigned int MaxRecoverableLength(unsigned int representativeBitLength, unsigned int hashIdentifierLength, unsigned int digestLength) const;
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bool IsProbabilistic() const;
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bool AllowNonrecoverablePart() const;
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bool RecoverablePartFirst() const;
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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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DecodingResult RecoverMessageFromRepresentative(
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HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
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byte *representative, unsigned int representativeBitLength,
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byte *recoverableMessage) const;
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};
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template <class H> struct EMSA2HashId
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{
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static const byte id;
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};
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// EMSA2HashId can be instantiated with the following two classes.
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class SHA;
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class RIPEMD160;
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class RIPEMD128;
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class SHA256;
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class SHA384;
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class SHA512;
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class Whirlpool;
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template <class BASE>
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class EMSA2HashIdLookup : public BASE
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{
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public:
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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(&EMSA2HashId<H>::id, 1);
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}
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};
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};
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};
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template <bool USE_HASH_ID> class PSSR_MEM_BaseWithHashId;
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template<> class PSSR_MEM_BaseWithHashId<true> : public EMSA2HashIdLookup<PSSR_MEM_Base> {};
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template<> class PSSR_MEM_BaseWithHashId<false> : public PSSR_MEM_Base {};
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template <bool ALLOW_RECOVERY, class MGF=P1363_MGF1, int SALT_LEN=-1, int MIN_PAD_LEN=0, bool USE_HASH_ID=false>
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class PSSR_MEM : public PSSR_MEM_BaseWithHashId<USE_HASH_ID>
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{
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virtual bool AllowRecovery() const {return ALLOW_RECOVERY;}
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virtual unsigned int SaltLen(unsigned int hashLen) const {return SALT_LEN < 0 ? hashLen : SALT_LEN;}
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virtual unsigned int MinPadLen(unsigned int hashLen) const {return MIN_PAD_LEN < 0 ? hashLen : MIN_PAD_LEN;}
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virtual const MaskGeneratingFunction & GetMGF() const {static MGF mgf; return mgf;}
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public:
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static std::string StaticAlgorithmName() {return std::string(ALLOW_RECOVERY ? "PSSR-" : "PSS-") + MGF::StaticAlgorithmName();}
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};
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//! <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PSSR-MGF1">PSSR-MGF1</a>
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struct PSSR : public SignatureStandard
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{
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typedef PSSR_MEM<true> SignatureMessageEncodingMethod;
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};
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//! <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PSS-MGF1">PSS-MGF1</a>
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struct PSS : public SignatureStandard
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{
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typedef PSSR_MEM<false> SignatureMessageEncodingMethod;
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};
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NAMESPACE_END
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#endif
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