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/*************************************************
* PK Utility Classes Header File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#ifndef BOTAN_PUBKEY_UTIL_H__
#define BOTAN_PUBKEY_UTIL_H__
#include <botan/base.h>
namespace Botan {
/*************************************************
* Encoding Method for Encryption *
*************************************************/
class EME
{
public:
virtual u32bit maximum_input_size(u32bit) const = 0;
SecureVector<byte> encode(const byte[], u32bit, u32bit) const;
SecureVector<byte> encode(const MemoryRegion<byte>&, u32bit) const;
SecureVector<byte> decode(const byte[], u32bit, u32bit) const;
SecureVector<byte> decode(const MemoryRegion<byte>&, u32bit) const;
virtual ~EME() {}
private:
virtual SecureVector<byte> pad(const byte[], u32bit, u32bit) const = 0;
virtual SecureVector<byte> unpad(const byte[], u32bit, u32bit) const = 0;
};
/*************************************************
* Encoding Method for Signatures, Appendix *
*************************************************/
class EMSA
{
public:
virtual void update(const byte[], u32bit) = 0;
virtual SecureVector<byte> raw_data() = 0;
virtual SecureVector<byte> encoding_of(const MemoryRegion<byte>&,
u32bit) = 0;
virtual bool verify(const MemoryRegion<byte>&, const MemoryRegion<byte>&,
u32bit) throw();
virtual ~EMSA() {}
};
/*************************************************
* Key Derivation Function *
*************************************************/
class KDF
{
public:
SecureVector<byte> derive_key(u32bit, const MemoryRegion<byte>&,
const std::string& = "") const;
SecureVector<byte> derive_key(u32bit, const MemoryRegion<byte>&,
const MemoryRegion<byte>&) const;
SecureVector<byte> derive_key(u32bit, const MemoryRegion<byte>&,
const byte[], u32bit) const;
SecureVector<byte> derive_key(u32bit, const byte[], u32bit,
const std::string& = "") const;
SecureVector<byte> derive_key(u32bit, const byte[], u32bit,
const byte[], u32bit) const;
virtual ~KDF() {}
private:
virtual SecureVector<byte> derive(u32bit, const byte[], u32bit,
const byte[], u32bit) const = 0;
};
/*************************************************
* Mask Generation Function *
*************************************************/
class MGF
{
public:
virtual void mask(const byte[], u32bit, byte[], u32bit) const = 0;
virtual ~MGF() {}
};
}
#endif
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