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/*
* OAEP
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_OAEP_H__
#define BOTAN_OAEP_H__
#include <botan/eme.h>
#include <botan/hash.h>
namespace Botan {
/**
* OAEP (called EME1 in IEEE 1363 and in earlier versions of the library)
*/
class BOTAN_DLL OAEP final : public EME
{
public:
size_t maximum_input_size(size_t) const override;
static OAEP* make(const Spec& spec);
/**
* @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 in[],
size_t in_length,
size_t key_length,
RandomNumberGenerator& rng) const override;
secure_vector<byte> unpad(byte& valid_mask,
const byte in[],
size_t in_len,
size_t key_length) const override;
secure_vector<byte> m_Phash;
std::unique_ptr<HashFunction> m_hash;
};
}
#endif
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