93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
#ifndef CRYPTOPP_PKCSPAD_H
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#define CRYPTOPP_PKCSPAD_H
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#include "cryptlib.h"
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#include "pubkey.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// <a href="http://www.weidai.com/scan-mirror/ca.html#cem_PKCS1-1.5">EME-PKCS1-v1_5</a>
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class PKCS_EncryptionPaddingScheme : public PK_PaddingAlgorithm
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{
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public:
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static const char * StaticAlgorithmName() {return "EME-PKCS1-v1_5";}
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unsigned int MaxUnpaddedLength(unsigned int paddedLength) const;
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void Pad(RandomNumberGenerator &rng, const byte *raw, unsigned int inputLength, byte *padded, unsigned int paddedLength) const;
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DecodingResult Unpad(const byte *padded, unsigned int paddedLength, byte *raw) const;
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};
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/// <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PKCS1-1.5">EMSA-PKCS1-v1_5</a>
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class PKCS_SignaturePaddingScheme : public PK_PaddingAlgorithm
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{
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public:
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static const char * StaticAlgorithmName() {return "EMSA-PKCS1-v1_5";}
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unsigned int MaxUnpaddedLength(unsigned int paddedLength) const;
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void Pad(RandomNumberGenerator &rng, const byte *raw, unsigned int inputLength, byte *padded, unsigned int paddedLength) const;
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DecodingResult Unpad(const byte *padded, unsigned int paddedLength, byte *raw) const;
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};
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/// <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PKCS1-1.5">EMSA-PKCS1-v1_5</a>
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template <class H>
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class PKCS_DecoratedHashModule : public HashTransformationWithDefaultTruncation
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{
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public:
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static std::string StaticAlgorithmName() {return std::string("EMSA-PKCS1-v1_5(") + H::StaticAlgorithmName() + ")";}
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void Update(const byte *input, unsigned int length)
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{h.Update(input, length);}
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unsigned int DigestSize() const;
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void Final(byte *digest);
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void Restart() {h.Restart();}
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private:
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H h;
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};
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//! PKCS #1 version 1.5, for use with RSAES and RSASSA
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/*! The following hash functions are supported for signature: SHA, MD2, MD5, RIPEMD160, SHA256, SHA384, SHA512. */
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struct PKCS1v15 : public SignatureStandard, public EncryptionStandard
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{
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typedef PKCS_EncryptionPaddingScheme EncryptionPaddingAlgorithm;
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template <class H> struct SignaturePaddingAlgorithm {typedef PKCS_SignaturePaddingScheme type;};
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template <class H> struct DecoratedHashingAlgorithm {typedef PKCS_DecoratedHashModule<H> type;};
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};
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template<> struct CryptoStandardTraits<PKCS1v15> : public PKCS1v15 {};
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template <class H> struct PKCS_DigestDecoration
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{
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static const byte decoration[];
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static const unsigned int length;
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};
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// PKCS_DecoratedHashModule can be instantiated with the following
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// classes as specified in PKCS#1 v2.0 and P1363a
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class SHA;
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class MD2;
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class MD5;
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class RIPEMD160;
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class SHA256;
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class SHA384;
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class SHA512;
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template <class H>
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void PKCS_DecoratedHashModule<H>::Final(byte *digest)
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{
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const unsigned int decorationLen = PKCS_DigestDecoration<H>::length;
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memcpy(digest, PKCS_DigestDecoration<H>::decoration, decorationLen);
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h.Final(digest+decorationLen);
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}
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template <class H>
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unsigned int PKCS_DecoratedHashModule<H>::DigestSize() const
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{
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return h.DigestSize() + PKCS_DigestDecoration<H>::length; // PKCS_DigestDecoration<H>::length;
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}
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NAMESPACE_END
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#endif
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