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#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:
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 ¶meters) const;
DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs ¶meters) 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:
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, 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
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