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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (ñ) 2012-16 Miranda NG project (http://miranda-ng.org)
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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
of the License, or (at your option) any later version.
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "stdafx.h"
/////////////////////////////////////////////////////////////////////////////////////////
#define DBKEY_PROVIDER "Provider"
#define DBKEY_KEY "Key"
#define DBKEY_IS_ENCRYPTED "EncryptedDB"
CRYPTO_PROVIDER* CDbxMdb::SelectProvider()
{
CRYPTO_PROVIDER **ppProvs, *pProv;
int iNumProvs;
Crypto_EnumProviders(&iNumProvs, &ppProvs);
if (iNumProvs == 0)
return nullptr;
if (iNumProvs > 1)
{
CSelectCryptoDialog dlg(ppProvs, iNumProvs);
dlg.DoModal();
pProv = dlg.GetSelected();
}
else pProv = ppProvs[0];
txn_ptr txn(m_pMdbEnv);
MDB_val key = { sizeof(DBKEY_PROVIDER), DBKEY_PROVIDER }, value = { mir_strlen(pProv->pszName) + 1, pProv->pszName };
mdb_put(txn, m_dbCrypto, &key, &value, 0);
txn.commit();
return pProv;
}
int CDbxMdb::InitCrypt()
{
CRYPTO_PROVIDER *pProvider;
txn_ptr_ro txn(m_txn);
MDB_val key = { sizeof(DBKEY_PROVIDER), DBKEY_PROVIDER }, value;
if (mdb_get(txn, m_dbCrypto, &key, &value) == MDB_SUCCESS)
{
pProvider = Crypto_GetProvider((const char*)value.mv_data);
if (pProvider == nullptr)
pProvider = SelectProvider();
}
else
{
pProvider = SelectProvider();
}
if (pProvider == nullptr)
return 1;
if ((m_crypto = pProvider->pFactory()) == nullptr)
return 3;
key.mv_size = sizeof(DBKEY_KEY); key.mv_data = DBKEY_KEY;
if (mdb_get(txn, m_dbCrypto, &key, &value) == MDB_SUCCESS)
{
if (value.mv_size != m_crypto->getKeyLength())
{
if (!m_crypto->generateKey())
return 6;
StoreKey();
}
else
{
if (!m_crypto->setKey((const BYTE*)value.mv_data, value.mv_size))
if (!EnterPassword((const BYTE*)value.mv_data, value.mv_size)) // password protected?
return 4;
}
}
else
{
if (!m_crypto->generateKey())
return 6;
StoreKey();
}
key.mv_size = sizeof(DBKEY_IS_ENCRYPTED); key.mv_data = DBKEY_IS_ENCRYPTED;
if (mdb_get(txn, m_dbCrypto, &key, &value) == MDB_SUCCESS)
m_bEncrypted = *(const BYTE*)value.mv_data != 0;
else
m_bEncrypted = false;
InitDialogs();
return 0;
}
void CDbxMdb::StoreKey()
{
size_t iKeyLength = m_crypto->getKeyLength();
BYTE *pKey = (BYTE*)_alloca(iKeyLength);
m_crypto->getKey(pKey, iKeyLength);
txn_ptr txn(m_pMdbEnv);
MDB_val key = { sizeof(DBKEY_KEY), DBKEY_KEY }, value = { iKeyLength, pKey };
mdb_put(txn, m_dbCrypto, &key, &value, 0);
txn.commit();
SecureZeroMemory(pKey, iKeyLength);
}
void CDbxMdb::SetPassword(LPCTSTR ptszPassword)
{
if (ptszPassword == NULL || *ptszPassword == 0) {
m_bUsesPassword = false;
m_crypto->setPassword(NULL);
}
else {
m_bUsesPassword = true;
m_crypto->setPassword(pass_ptrA(mir_utf8encodeT(ptszPassword)));
}
UpdateMenuItem();
}
/////////////////////////////////////////////////////////////////////////////////////////
void CDbxMdb::ToggleEncryption()
{
HANDLE hSave1 = hSettingChangeEvent; hSettingChangeEvent = NULL;
HANDLE hSave2 = hEventAddedEvent; hEventAddedEvent = NULL;
HANDLE hSave3 = hEventDeletedEvent; hEventDeletedEvent = NULL;
HANDLE hSave4 = hEventFilterAddedEvent; hEventFilterAddedEvent = NULL;
mir_cslock lck(m_csDbAccess);
ToggleSettingsEncryption(NULL);
ToggleEventsEncryption(NULL);
for (MCONTACT contactID = FindFirstContact(); contactID; contactID = FindNextContact(contactID)) {
ToggleSettingsEncryption(contactID);
ToggleEventsEncryption(contactID);
}
m_bEncrypted = !m_bEncrypted;
txn_ptr txn(m_pMdbEnv);
MDB_val key = { sizeof(DBKEY_IS_ENCRYPTED), DBKEY_IS_ENCRYPTED }, value = { sizeof(BYTE), &m_bEncrypted };
mdb_put(txn, m_dbCrypto, &key, &value, 0);
txn.commit();
hSettingChangeEvent = hSave1;
hEventAddedEvent = hSave2;
hEventDeletedEvent = hSave3;
hEventFilterAddedEvent = hSave4;
}
void CDbxMdb::ToggleSettingsEncryption(MCONTACT /*contactID*/)
{
}
void CDbxMdb::ToggleEventsEncryption(MCONTACT /*contactID*/)
{
}
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