pkcspad.h
// pkcspad.h - written and placed in the public domain by Wei Dai
//! \headerfile pkcspad.h
//! \brief Classes for PKCS padding schemes
#ifndef CRYPTOPP_PKCSPAD_H
#define CRYPTOPP_PKCSPAD_H
#include "cryptlib.h"
#include "pubkey.h"
#ifdef CRYPTOPP_IS_DLL
#include "sha.h"
#endif
NAMESPACE_BEGIN(CryptoPP)
//! <a href="http://www.weidai.com/scan-mirror/ca.html#cem_PKCS1-1.5">EME-PKCS1-v1_5</a>
class PKCS_EncryptionPaddingScheme : public PK_EncryptionMessageEncodingMethod
{
public:
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "EME-PKCS1-v1_5";}
size_t MaxUnpaddedLength(size_t paddedLength) const;
void Pad(RandomNumberGenerator &rng, const byte *raw, size_t inputLength, byte *padded, size_t paddedLength, const NameValuePairs &parameters) const;
DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs &parameters) const;
};
template <class H> class PKCS_DigestDecoration
{
public:
static const byte decoration[];
static const unsigned int length;
};
// PKCS_DigestDecoration can be instantiated with the following
// classes as specified in PKCS#1 v2.0 and P1363a
class SHA1;
class RIPEMD160;
class Tiger;
class SHA224;
class SHA256;
class SHA384;
class SHA512;
namespace Weak1 {
class MD2;
class MD5;
}
// end of list
#ifdef CRYPTOPP_IS_DLL
CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA1>;
CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA224>;
CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA256>;
CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA384>;
CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA512>;
#endif
//! <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PKCS1-1.5">EMSA-PKCS1-v1_5</a>
class CRYPTOPP_DLL PKCS1v15_SignatureMessageEncodingMethod : public PK_DeterministicSignatureMessageEncodingMethod
{
public:
CRYPTOPP_CONSTEXPR static const char * CRYPTOPP_API StaticAlgorithmName() {return "EMSA-PKCS1-v1_5";}
size_t MinRepresentativeBitLength(size_t hashIdentifierSize, size_t digestSize) const
{return 8 * (digestSize + hashIdentifierSize + 10);}
void ComputeMessageRepresentative(RandomNumberGenerator &rng,
const byte *recoverableMessage, size_t recoverableMessageLength,
HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
byte *representative, size_t representativeBitLength) const;
struct HashIdentifierLookup
{
template <class H> struct HashIdentifierLookup2
{
static HashIdentifier Lookup()
{
return HashIdentifier(PKCS_DigestDecoration<H>::decoration, (size_t)PKCS_DigestDecoration<H>::length);
}
};
};
};
//! PKCS #1 version 1.5, for use with RSAES and RSASS
/*! Only the following hash functions are supported by this signature standard:
\dontinclude pkcspad.h
\skip can be instantiated
\until end of list
*/
struct PKCS1v15 : public SignatureStandard, public EncryptionStandard
{
typedef PKCS_EncryptionPaddingScheme EncryptionMessageEncodingMethod;
typedef PKCS1v15_SignatureMessageEncodingMethod SignatureMessageEncodingMethod;
};
NAMESPACE_END
#endif
PKCS_EncryptionPaddingScheme
Classes for PKCS padding schemes.
Definition: pkcspad.h:19
PKCS1v15_SignatureMessageEncodingMethod::HashIdentifierLookup::HashIdentifierLookup2
Definition: pkcspad.h:75
HashTransformation
Interface for hash functions and data processing part of MACs.
Definition: cryptlib.h:922
SHA1
SHA-1
Definition: sha.h:21
pubkey.h
This file contains helper classes/functions for implementing public key algorithms.
PK_DeterministicSignatureMessageEncodingMethod
Interface for message encoding method for public key signature schemes.
Definition: pubkey.h:408
SHA512
implements the SHA-512 standard
Definition: sha.h:56
RIPEMD160
RIPEMD-160
Definition: ripemd.h:15
RandomNumberGenerator
Interface for random number generators.
Definition: cryptlib.h:1186
sha.h
Classes for SHA-1 and SHA-2 family of message digests.
EncryptionStandard
Base class for public key encryption standard classes.
Definition: pubkey.h:2151
DecodingResult
Returns a decoding results.
Definition: cryptlib.h:236
PKCS1v15_SignatureMessageEncodingMethod
EMSA-PKCS1-v1_5
Definition: pkcspad.h:60
PKCS_DigestDecoration
Definition: pkcspad.h:29
PKCS1v15_SignatureMessageEncodingMethod::HashIdentifierLookup
Definition: pkcspad.h:73
PK_EncryptionMessageEncodingMethod
Message encoding method for public key encryption.
Definition: pubkey.h:215
SHA224
implements the SHA-224 standard
Definition: sha.h:44
CryptoPP
Crypto++ library namespace.
PKCS1v15
PKCS #1 version 1.5, for use with RSAES and RSASS.
Definition: pkcspad.h:91
SHA384
implements the SHA-384 standard
Definition: sha.h:65
Tiger
Tiger
Definition: tiger.h:10
SHA256
implements the SHA-256 standard
Definition: sha.h:32
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:277
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
SignatureStandard
Base class for public key signature standard classes.
Definition: pubkey.h:2156