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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (C) 2012-20 Miranda NG team (https://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"
char DBKey_Crypto_Provider[] = "Provider";
char DBKey_Crypto_Key[] = "Key";
char DBKey_Crypto_IsEncrypted[] = "EncryptedDB";
/////////////////////////////////////////////////////////////////////////////////////////
// Saving encryption key in a database
STDMETHODIMP_(BOOL) CDbxMDBX::ReadCryptoKey(MBinBuffer &buf)
{
MDBX_val key = { DBKey_Crypto_Key, sizeof(DBKey_Crypto_Key) }, value;
int rc = mdbx_get(StartTran(), m_dbCrypto, &key, &value);
if (rc != MDBX_SUCCESS)
return FALSE;
buf.append(value.iov_base, value.iov_len);
return TRUE;
}
STDMETHODIMP_(BOOL) CDbxMDBX::StoreCryptoKey()
{
size_t iKeyLength = m_crypto->getKeyLength();
BYTE *pKey = (BYTE*)_alloca(iKeyLength);
m_crypto->getKey(pKey, iKeyLength);
{
txn_ptr trnlck(this);
MDBX_val key = { DBKey_Crypto_Key, sizeof(DBKey_Crypto_Key) }, value = { pKey, iKeyLength };
int rc = mdbx_put(trnlck, m_dbCrypto, &key, &value, MDBX_UPSERT);
/* FIXME: throw an exception */
assert(rc == MDBX_SUCCESS);
UNREFERENCED_PARAMETER(rc);
}
SecureZeroMemory(pKey, iKeyLength);
DBFlush();
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////////////////
// Saving encryption flag
STDMETHODIMP_(BOOL) CDbxMDBX::ReadEncryption()
{
MDBX_val key = { DBKey_Crypto_IsEncrypted, sizeof(DBKey_Crypto_IsEncrypted) }, value;
if (mdbx_get(StartTran(), m_dbCrypto, &key, &value) == MDBX_SUCCESS)
return *(const bool *)value.iov_base;
return false;
}
/////////////////////////////////////////////////////////////////////////////////////////
// Saving provider in a database
STDMETHODIMP_(CRYPTO_PROVIDER *) CDbxMDBX::ReadProvider()
{
MDBX_val key = { DBKey_Crypto_Provider, sizeof(DBKey_Crypto_Provider) }, value;
int rc = mdbx_get(StartTran(), m_dbCrypto, &key, &value);
return (rc == MDBX_SUCCESS) ? Crypto_GetProvider((const char *)value.iov_base) : nullptr;
}
STDMETHODIMP_(BOOL) CDbxMDBX::StoreProvider(CRYPTO_PROVIDER *pProv)
{
txn_ptr trnlck(this);
MDBX_val key = { DBKey_Crypto_Provider, sizeof(DBKey_Crypto_Provider) }, value = { pProv->pszName, mir_strlen(pProv->pszName) + 1 };
if (mdbx_put(trnlck, m_dbCrypto, &key, &value, MDBX_UPSERT) != MDBX_SUCCESS)
return FALSE;
DBFlush();
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////////////////
STDMETHODIMP_(BOOL) CDbxMDBX::EnableEncryption(BOOL bEncrypted)
{
if (m_bEncrypted == bEncrypted)
return TRUE;
std::vector<MEVENT> lstEvents;
MDBX_stat st;
mdbx_dbi_stat(StartTran(), m_dbEvents, &st, sizeof(st));
lstEvents.reserve(st.ms_entries);
{
MDBX_val key, data;
cursor_ptr pCursor(StartTran(), m_dbEvents);
while (mdbx_cursor_get(pCursor, &key, &data, MDBX_NEXT) == MDBX_SUCCESS) {
const MEVENT hDbEvent = *(const MEVENT *)key.iov_base;
lstEvents.push_back(hDbEvent);
}
}
do {
size_t portion = min(lstEvents.size(), 1000);
txn_ptr trnlck(this);
for (size_t i = 0; i < portion; i++) {
MEVENT &hDbEvent = lstEvents[i];
MDBX_val key = { &hDbEvent, sizeof(MEVENT) }, data;
int rc = mdbx_get(trnlck, m_dbEvents, &key, &data);
if (rc != MDBX_SUCCESS) {
if (rc != MDBX_NOTFOUND)
assert(rc == MDBX_SUCCESS);
continue;
}
const DBEvent *dbEvent = (const DBEvent*)data.iov_base;
const BYTE *pBlob = (BYTE*)(dbEvent + 1);
if (((dbEvent->flags & DBEF_ENCRYPTED) != 0) != bEncrypted) {
mir_ptr<BYTE> pNewBlob;
size_t nNewBlob;
uint32_t dwNewFlags;
if (dbEvent->flags & DBEF_ENCRYPTED) {
pNewBlob = (BYTE*)m_crypto->decodeBuffer(pBlob, dbEvent->cbBlob, &nNewBlob);
dwNewFlags = dbEvent->flags & (~DBEF_ENCRYPTED);
}
else {
pNewBlob = m_crypto->encodeBuffer(pBlob, dbEvent->cbBlob, &nNewBlob);
dwNewFlags = dbEvent->flags | DBEF_ENCRYPTED;
}
data.iov_len = sizeof(DBEvent) + nNewBlob;
mir_ptr<BYTE> pData((BYTE*)mir_alloc(data.iov_len));
data.iov_base = pData.get();
DBEvent *pNewDBEvent = (DBEvent *)data.iov_base;
*pNewDBEvent = *dbEvent;
pNewDBEvent->cbBlob = (uint16_t)nNewBlob;
pNewDBEvent->flags = dwNewFlags;
memcpy(pNewDBEvent + 1, pNewBlob, nNewBlob);
if (mdbx_put(trnlck, m_dbEvents, &key, &data, MDBX_UPSERT) != MDBX_SUCCESS)
return FALSE;
}
}
lstEvents.erase(lstEvents.begin(), lstEvents.begin()+portion);
}
while (lstEvents.size() > 0);
{
txn_ptr trnlck(this);
MDBX_val key = { DBKey_Crypto_IsEncrypted, sizeof(DBKey_Crypto_IsEncrypted) }, value = { &bEncrypted, sizeof(bool) };
if (mdbx_put(trnlck, m_dbCrypto, &key, &value, MDBX_UPSERT) != MDBX_SUCCESS)
return FALSE;
}
DBFlush();
m_bEncrypted = bEncrypted;
return TRUE;
}
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