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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (ñ) 2012-17 Miranda NG project (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";
CRYPTO_PROVIDER* CDbxMdb::SelectProvider()
{
CRYPTO_PROVIDER **ppProvs, *pProv;
int iNumProvs;
Crypto_EnumProviders(&iNumProvs, &ppProvs);
if (iNumProvs == 0)
return nullptr;
bool bTotalCrypt = false;
if (iNumProvs > 1) {
CSelectCryptoDialog dlg(ppProvs, iNumProvs);
dlg.DoModal();
pProv = dlg.GetSelected();
bTotalCrypt = dlg.TotalSelected();
}
else pProv = ppProvs[0];
for (;; Remap()) {
txn_ptr txn(m_pMdbEnv);
MDBX_val key = { DBKey_Crypto_Provider, sizeof(DBKey_Crypto_Provider) }, value = { pProv->pszName, mir_strlen(pProv->pszName) + 1 };
MDBX_CHECK(mdbx_put(txn, m_dbCrypto, &key, &value, 0), nullptr);
key.iov_len = sizeof(DBKey_Crypto_IsEncrypted); key.iov_base = DBKey_Crypto_IsEncrypted; value.iov_len = sizeof(bool); value.iov_base = &bTotalCrypt;
MDBX_CHECK(mdbx_put(txn, m_dbCrypto, &key, &value, 0), nullptr);
if (txn.commit() == MDBX_SUCCESS)
break;
}
return pProv;
}
int CDbxMdb::InitCrypt()
{
CRYPTO_PROVIDER *pProvider;
txn_ptr_ro txn(m_txn);
MDBX_val key = { DBKey_Crypto_Provider, sizeof(DBKey_Crypto_Provider) }, value;
if (mdbx_get(txn, m_dbCrypto, &key, &value) == MDBX_SUCCESS) {
pProvider = Crypto_GetProvider((const char*)value.iov_base);
if (pProvider == nullptr)
pProvider = SelectProvider();
}
else pProvider = SelectProvider();
if (pProvider == nullptr)
return 1;
if ((m_crypto = pProvider->pFactory()) == nullptr)
return 3;
key.iov_len = sizeof(DBKey_Crypto_Key); key.iov_base = DBKey_Crypto_Key;
if (mdbx_get(txn, m_dbCrypto, &key, &value) == MDBX_SUCCESS && (value.iov_len == m_crypto->getKeyLength())) {
if (!m_crypto->setKey((const BYTE*)value.iov_base, value.iov_len)) {
DlgChangePassParam param = { this };
CEnterPasswordDialog dlg(¶m);
while (true) {
if (-128 != dlg.DoModal())
return 4;
m_crypto->setPassword(pass_ptrA(mir_utf8encodeW(param.newPass)));
if (m_crypto->setKey((const BYTE*)value.iov_base, value.iov_len)) {
m_bUsesPassword = true;
SecureZeroMemory(¶m, sizeof(param));
break;
}
param.wrongPass++;
}
}
}
else {
if (!m_crypto->generateKey())
return 6;
StoreKey();
}
key.iov_len = sizeof(DBKey_Crypto_IsEncrypted); key.iov_base = DBKey_Crypto_IsEncrypted;
if (mdbx_get(txn, m_dbCrypto, &key, &value) == MDBX_SUCCESS)
m_bEncrypted = *(const bool*)value.iov_base;
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);
for (;; Remap()) {
txn_ptr txn(m_pMdbEnv);
MDBX_val key = { DBKey_Crypto_Key, sizeof(DBKey_Crypto_Key) }, value = { pKey, iKeyLength };
mdbx_put(txn, m_dbCrypto, &key, &value, 0);
if (txn.commit() == MDBX_SUCCESS)
break;
}
SecureZeroMemory(pKey, iKeyLength);
}
void CDbxMdb::SetPassword(const wchar_t *ptszPassword)
{
if (ptszPassword == NULL || *ptszPassword == 0) {
m_bUsesPassword = false;
m_crypto->setPassword(NULL);
}
else {
m_bUsesPassword = true;
m_crypto->setPassword(pass_ptrA(mir_utf8encodeW(ptszPassword)));
}
UpdateMenuItem();
}
/////////////////////////////////////////////////////////////////////////////////////////
int CDbxMdb::EnableEncryption(bool bEncrypted)
{
if (m_bEncrypted == bEncrypted)
return 0;
{
txn_ptr_ro txn(m_txn);
MDBX_stat st;
mdbx_dbi_stat(txn, m_dbEvents, &st, sizeof(st));
std::vector<MEVENT> lstEvents;
lstEvents.reserve(st.ms_entries);
{
cursor_ptr_ro cursor(m_curEvents);
MDBX_val key, data;
while (mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT) == MDBX_SUCCESS) {
const MEVENT hDbEvent = *(const MEVENT*)key.iov_base;
lstEvents.push_back(hDbEvent);
}
}
for (auto it = lstEvents.begin(); it != lstEvents.end(); ++it) {
MEVENT &hDbEvent = *it;
MDBX_val key = { &hDbEvent, sizeof(MEVENT) }, data;
mdbx_get(txn, m_dbEvents, &key, &data);
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;
}
for (;; Remap()) {
txn_ptr txn(m_pMdbEnv);
data.iov_len = sizeof(DBEvent) + nNewBlob;
MDBX_CHECK(mdbx_put(txn, m_dbEvents, &key, &data, MDBX_RESERVE), 1);
DBEvent *pNewDBEvent = (DBEvent *)data.iov_base;
*pNewDBEvent = *dbEvent;
pNewDBEvent->cbBlob = nNewBlob;
pNewDBEvent->flags = dwNewFlags;
memcpy(pNewDBEvent + 1, pNewBlob, nNewBlob);
if (txn.commit() == MDBX_SUCCESS)
break;
}
}
}
}
for (;; Remap()) {
txn_ptr txn(m_pMdbEnv);
MDBX_val key = { DBKey_Crypto_IsEncrypted, sizeof(DBKey_Crypto_IsEncrypted) }, value = { &bEncrypted, sizeof(bool) };
MDBX_CHECK(mdbx_put(txn, m_dbCrypto, &key, &value, 0), 1);
if (txn.commit() == MDBX_SUCCESS)
break;
}
m_bEncrypted = bEncrypted;
return 0;
}
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