/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2017 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include "Common/Pkcs5.h"
#include "Pkcs5Kdf.h"
#include "VolumePassword.h"

namespace VeraCrypt
{
	Pkcs5Kdf::Pkcs5Kdf ()
	{
	}

	Pkcs5Kdf::~Pkcs5Kdf ()
	{
	}

	void Pkcs5Kdf::DeriveKey (const BufferPtr &key, const VolumePassword &password, int pim, const ConstBufferPtr &salt) const
	{
		DeriveKey (key, password, salt, GetIterationCount(pim));
	}

	shared_ptr <Pkcs5Kdf> Pkcs5Kdf::GetAlgorithm (const wstring &name)
	{
		foreach (shared_ptr <Pkcs5Kdf> kdf, GetAvailableAlgorithms())
		{
			if (kdf->GetName() == name)
				return kdf;
		}
		throw ParameterIncorrect (SRC_POS);
	}

	shared_ptr <Pkcs5Kdf> Pkcs5Kdf::GetAlgorithm (const Hash &hash)
	{
		foreach (shared_ptr <Pkcs5Kdf> kdf, GetAvailableAlgorithms())
		{
			if (typeid (*kdf->GetHash()) == typeid (hash))
				return kdf;
		}

		throw ParameterIncorrect (SRC_POS);
	}

	Pkcs5KdfList Pkcs5Kdf::GetAvailableAlgorithms ()
	{
		Pkcs5KdfList l;

		l.push_back (shared_ptr <Pkcs5Kdf> (new Pkcs5HmacSha512 ()));
		l.push_back (shared_ptr <Pkcs5Kdf> (new Pkcs5HmacSha256 ()));
        #ifndef WOLFCRYPT_BACKEND
		l.push_back (shared_ptr <Pkcs5Kdf> (new Pkcs5HmacBlake2s ()));
                l.push_back (shared_ptr <Pkcs5Kdf> (new Pkcs5HmacWhirlpool ()));
		l.push_back (shared_ptr <Pkcs5Kdf> (new Pkcs5HmacStreebog ()));
        #endif
		return l;
	}

	void Pkcs5Kdf::ValidateParameters (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		if (key.Size() < 1 || password.Size() < 1 || salt.Size() < 1 || iterationCount < 1)
			throw ParameterIncorrect (SRC_POS);
	}

    #ifndef WOLFCRYPT_BACKEND
	void Pkcs5HmacBlake2s_Boot::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_blake2s ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}

	void Pkcs5HmacBlake2s::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_blake2s ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}
    #endif

	void Pkcs5HmacSha256_Boot::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_sha256 ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}

	void Pkcs5HmacSha256::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_sha256 ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}

	void Pkcs5HmacSha512::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_sha512 ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}

    #ifndef WOLFCRYPT_BACKEND
	void Pkcs5HmacWhirlpool::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_whirlpool ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}
	
	void Pkcs5HmacStreebog::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_streebog ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}
	
	void Pkcs5HmacStreebog_Boot::DeriveKey (const BufferPtr &key, const VolumePassword &password, const ConstBufferPtr &salt, int iterationCount) const
	{
		ValidateParameters (key, password, salt, iterationCount);
		derive_key_streebog ((char *) password.DataPtr(), (int) password.Size(), (char *) salt.Get(), (int) salt.Size(), iterationCount, (char *) key.Get(), (int) key.Size());
	}
    #endif
}