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/*
* Copyright (C) 2010 Felix Geyer <debfx@fobos.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 or (at your option)
* version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "SymmetricCipher.h"
#include "config-keepassx.h"
#include "crypto/SymmetricCipherGcrypt.h"
SymmetricCipher::SymmetricCipher(Algorithm algo, Mode mode, Direction direction)
: m_backend(createBackend(algo, mode, direction))
, m_initialized(false)
, m_algo(algo)
{
}
SymmetricCipher::~SymmetricCipher()
{
}
bool SymmetricCipher::init(const QByteArray& key, const QByteArray& iv)
{
if (!m_backend->init()) {
return false;
}
if (!m_backend->setKey(key)) {
return false;
}
if (!m_backend->setIv(iv)) {
return false;
}
m_initialized = true;
return true;
}
bool SymmetricCipher::isInitalized() const
{
return m_initialized;
}
SymmetricCipherBackend* SymmetricCipher::createBackend(Algorithm algo, Mode mode, Direction direction)
{
switch (algo) {
case Aes128:
case Aes256:
case Twofish:
case Salsa20:
case ChaCha20:
return new SymmetricCipherGcrypt(algo, mode, direction);
default:
Q_ASSERT(false);
return nullptr;
}
}
bool SymmetricCipher::reset()
{
return m_backend->reset();
}
int SymmetricCipher::keySize() const
{
return m_backend->keySize();
}
int SymmetricCipher::blockSize() const
{
return m_backend->blockSize();
}
QString SymmetricCipher::errorString() const
{
return m_backend->errorString();
}
SymmetricCipher::Algorithm SymmetricCipher::cipherToAlgorithm(Uuid cipher)
{
if (cipher == KeePass2::CIPHER_AES) {
return Aes256;
} else if (cipher == KeePass2::CIPHER_CHACHA20) {
return ChaCha20;
} else if (cipher == KeePass2::CIPHER_TWOFISH) {
return Twofish;
}
qWarning("SymmetricCipher::cipherToAlgorithm: invalid Uuid %s", cipher.toByteArray().toHex().data());
return InvalidAlgorithm;
}
Uuid SymmetricCipher::algorithmToCipher(Algorithm algo)
{
switch (algo) {
case Aes256:
return KeePass2::CIPHER_AES;
case ChaCha20:
return KeePass2::CIPHER_CHACHA20;
case Twofish:
return KeePass2::CIPHER_TWOFISH;
default:
qWarning("SymmetricCipher::algorithmToCipher: invalid algorithm %d", algo);
return Uuid();
}
}
int SymmetricCipher::algorithmIvSize(Algorithm algo)
{
switch (algo) {
case ChaCha20:
return 12;
case Aes256:
return 16;
case Twofish:
return 16;
default:
qWarning("SymmetricCipher::algorithmIvSize: invalid algorithm %d", algo);
return -1;
}
}
SymmetricCipher::Mode SymmetricCipher::algorithmMode(Algorithm algo)
{
switch (algo) {
case ChaCha20:
return Stream;
case Aes256:
case Twofish:
return Cbc;
default:
qWarning("SymmetricCipher::algorithmMode: invalid algorithm %d", algo);
return InvalidMode;
}
}
SymmetricCipher::Algorithm SymmetricCipher::algorithm() const
{
return m_algo;
}
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