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/*
* OAEP
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_OAEP_H__
#define BOTAN_OAEP_H__
#include <botan/eme.h>
#include <botan/kdf.h>
#include <botan/hash.h>
#include <memory>
namespace Botan {
/**
* OAEP (called EME1 in IEEE 1363 and in earlier versions of the library)
*/
class BOTAN_DLL OAEP : public EME
{
public:
size_t maximum_input_size(size_t) const;
/**
* @param hash object to use for hashing (takes ownership)
* @param P an optional label. Normally empty.
*/
OAEP(HashFunction* hash, const std::string& P = "");
private:
secure_vector<byte> pad(const byte[], size_t, size_t,
RandomNumberGenerator&) const;
secure_vector<byte> unpad(const byte[], size_t, size_t) const;
secure_vector<byte> m_Phash;
std::unique_ptr<HashFunction> m_hash;
};
}
#endif
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