emsa2.h
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// emsa2.h - written and placed in the public domain by Wei Dai
//! \file emsa2.h
//! \brief Classes and functions for various padding schemes used in public key algorithms
#ifndef CRYPTOPP_EMSA2_H
#define CRYPTOPP_EMSA2_H
#include "cryptlib.h"
#include "pubkey.h"
#include "misc.h"
#ifdef CRYPTOPP_IS_DLL
#include "sha.h"
#endif
NAMESPACE_BEGIN(CryptoPP)
template <class H> class EMSA2HashId
{
public:
static const byte id;
};
template <class BASE>
class EMSA2HashIdLookup : public BASE
{
public:
struct HashIdentifierLookup
{
template <class H> struct HashIdentifierLookup2
{
static HashIdentifier Lookup()
{
return HashIdentifier(&EMSA2HashId<H>::id, 1);
}
};
};
};
// EMSA2HashId can be instantiated with the following classes.
class SHA1;
class RIPEMD160;
class RIPEMD128;
class SHA256;
class SHA384;
class SHA512;
class Whirlpool;
class SHA224;
// end of list
#ifdef CRYPTOPP_IS_DLL
CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA1>;
CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA224>;
CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA256>;
CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA384>;
CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA512>;
#endif
//! _
class CRYPTOPP_DLL EMSA2Pad : public EMSA2HashIdLookup<PK_DeterministicSignatureMessageEncodingMethod>
{
public:
CRYPTOPP_CONSTEXPR static const char * CRYPTOPP_API StaticAlgorithmName() {return "EMSA2";}
size_t MinRepresentativeBitLength(size_t hashIdentifierLength, size_t digestLength) const
{CRYPTOPP_UNUSED(hashIdentifierLength); return 8*digestLength + 31;}
void ComputeMessageRepresentative(RandomNumberGenerator &rng,
const byte *recoverableMessage, size_t recoverableMessageLength,
HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
byte *representative, size_t representativeBitLength) const;
};
//! EMSA2, for use with RWSS and RSA_ISO
/*! Only the following hash functions are supported by this signature standard:
\dontinclude emsa2.h
\skip EMSA2HashId can be instantiated
\until end of list
*/
struct P1363_EMSA2 : public SignatureStandard
{
typedef EMSA2Pad SignatureMessageEncodingMethod;
};
NAMESPACE_END
#endif
SHA384
implements the SHA-384 standard
Definition: sha.h:65
misc.h
Utility functions for the Crypto++ library.
SHA256
implements the SHA-256 standard
Definition: sha.h:32
pubkey.h
This file contains helper classes/functions for implementing public key algorithms.
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
RIPEMD160
RIPEMD-160
Definition: ripemd.h:15
RandomNumberGenerator
Interface for random number generators.
Definition: cryptlib.h:1186
EMSA2Pad
_
Definition: emsa2.h:61
SignatureStandard
Base class for public key signature standard classes.
Definition: pubkey.h:2146
EMSA2HashIdLookup::HashIdentifierLookup::HashIdentifierLookup2
Definition: emsa2.h:31
EMSA2HashId
Definition: emsa2.h:19
P1363_EMSA2
EMSA2, for use with RWSS and RSA_ISO.
Definition: emsa2.h:81
Whirlpool
Whirlpool
Definition: whrlpool.h:10
EMSA2HashIdLookup::HashIdentifierLookup
Definition: emsa2.h:29
SHA512
implements the SHA-512 standard
Definition: sha.h:56
SHA1
SHA-1
Definition: sha.h:21
EMSA2HashIdLookup
Definition: emsa2.h:26
sha.h
Classes for SHA-1 and SHA-2 family of message digests.
HashTransformation
Interface for hash functions and data processing part of MACs.
Definition: cryptlib.h:922
CryptoPP
Crypto++ library namespace.
RIPEMD128
Definition: ripemd.h:34
SHA224
implements the SHA-224 standard
Definition: sha.h:44