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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright 2012-14 Miranda NG project,
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 "commonheaders.h"
/////////////////////////////////////////////////////////////////////////////////////////
bool isEncrypted(LPCSTR szModule, LPCSTR szSetting);
//VERY VERY VERY BASIC ENCRYPTION FUNCTION
static void Encrypt(char *msg, BOOL up)
{
int jump = (up) ? 5 : -5;
for (int i = 0; msg[i]; i++)
msg[i] = msg[i] + jump;
}
__forceinline void DecodeString(LPSTR buf)
{
Encrypt(buf, FALSE);
}
struct VarDescr
{
VarDescr(LPCSTR var, LPCSTR value) :
szVar(mir_strdup(var)),
szValue(mir_strdup(value))
{}
ptrA szVar, szValue;
};
struct SettingUgraderParam
{
CDb3Mmap *db;
LPCSTR szModule;
HANDLE hContact;
OBJLIST<VarDescr>* pList;
};
int sttSettingUgrader(const char *szSetting, LPARAM lParam)
{
SettingUgraderParam *param = (SettingUgraderParam*)lParam;
if (isEncrypted(param->szModule, szSetting)) {
DBVARIANT dbv = { DBVT_UTF8 };
DBCONTACTGETSETTING dbcgs = { param->szModule, szSetting, &dbv };
if (!param->db->GetContactSettingStr(param->hContact, &dbcgs)) {
if (dbv.type == DBVT_UTF8) {
DecodeString(dbv.pszVal);
param->pList->insert(new VarDescr(szSetting, dbv.pszVal));
}
param->db->FreeVariant(&dbv);
}
}
return 0;
}
void sttContactEnum(HANDLE hContact, const char *szModule, CDb3Mmap *db)
{
OBJLIST<VarDescr> arSettings(1);
SettingUgraderParam param = { db, szModule, hContact, &arSettings };
DBCONTACTENUMSETTINGS dbces = { 0 };
dbces.pfnEnumProc = sttSettingUgrader;
dbces.szModule = szModule;
dbces.lParam = (LPARAM)¶m;
db->EnumContactSettings(NULL, &dbces);
for (int i = 0; i < arSettings.getCount(); i++) {
VarDescr &p = arSettings[i];
size_t len;
BYTE *pResult = db->m_crypto->encodeString(p.szValue, &len);
if (pResult != NULL) {
DBCONTACTWRITESETTING dbcws = { szModule, p.szVar };
dbcws.value.type = DBVT_ENCRYPTED;
dbcws.value.pbVal = pResult;
dbcws.value.cpbVal = (WORD)len;
db->WriteContactSetting(hContact, &dbcws);
mir_free(pResult);
}
}
}
int sttModuleEnum(const char *szModule, DWORD, LPARAM lParam)
{
CDb3Mmap *db = (CDb3Mmap*)lParam;
sttContactEnum(NULL, szModule, db);
for (HANDLE hContact = db->FindFirstContact(); hContact; hContact = db->FindNextContact(hContact))
sttContactEnum(hContact, szModule, db);
return 0;
}
/////////////////////////////////////////////////////////////////////////////////////////
int CDb3Mmap::InitCrypt()
{
CRYPTO_PROVIDER *pProvider;
DBVARIANT dbv = { 0 };
dbv.type = DBVT_ASCIIZ;
DBCONTACTGETSETTING dbcgs = { "CryptoEngine", "Provider", &dbv };
if (GetContactSettingStr(NULL, &dbcgs)) {
LBL_CreateProvider:
CRYPTO_PROVIDER **ppProvs;
int iNumProvs;
Crypto_EnumProviders(&iNumProvs, &ppProvs);
if (iNumProvs == 0)
return 1;
pProvider = ppProvs[0]; //!!!!!!!!!!!!!!!!!!
DBCONTACTWRITESETTING dbcws = { "CryptoEngine", "Provider" };
dbcws.value.type = DBVT_ASCIIZ;
dbcws.value.pszVal = pProvider->pszName;
WriteContactSetting(NULL, &dbcws);
}
else {
pProvider = Crypto_GetProvider(dbv.pszVal);
FreeVariant(&dbv);
if (pProvider == NULL)
goto LBL_CreateProvider;
}
if ((m_crypto = pProvider->pFactory()) == NULL)
return 3;
dbv.type = DBVT_BLOB;
dbcgs.szSetting = "StoredKey";
if (GetContactSetting(NULL, &dbcgs)) {
LBL_SetNewKey:
m_crypto->generateKey(); // unencrypted key
StoreKey();
}
else {
size_t iKeyLength = m_crypto->getKeyLength();
if (dbv.cpbVal != (WORD)iKeyLength)
goto LBL_SetNewKey;
if (!m_crypto->setKey(dbv.pbVal, iKeyLength)) {
if (!m_bEncrypted)
goto LBL_SetNewKey;
if (!EnterPassword(dbv.pbVal, iKeyLength)) { // password protected?
if (m_dbHeader.version == DB_THIS_VERSION)
return 4;
// one of the early used version of mmap was replaced then by mmap_sa
// simply remove old badly generated key
goto LBL_SetNewKey;
}
}
FreeVariant(&dbv);
}
if (memcmp(&m_dbHeader.signature, &dbSignatureU, sizeof(m_dbHeader.signature)) &&
memcmp(&m_dbHeader.signature, &dbSignatureE, sizeof(m_dbHeader.signature)))
{
EnumModuleNames(sttModuleEnum, this);
// upgrade signature
WriteSignature(dbSignatureU);
}
if (m_dbHeader.version == DB_OLD_VERSION) {
m_dbHeader.version = DB_THIS_VERSION;
DBWrite(sizeof(dbSignatureU), &m_dbHeader.version, sizeof(m_dbHeader.version));
}
InitDialogs();
return 0;
}
void CDb3Mmap::StoreKey()
{
size_t iKeyLength = m_crypto->getKeyLength();
BYTE *pKey = (BYTE*)_alloca(iKeyLength);
m_crypto->getKey(pKey, iKeyLength);
DBCONTACTWRITESETTING dbcws = { "CryptoEngine", "StoredKey" };
dbcws.value.type = DBVT_BLOB;
dbcws.value.cpbVal = (WORD)iKeyLength;
dbcws.value.pbVal = pKey;
WriteContactSetting(NULL, &dbcws);
SecureZeroMemory(pKey, iKeyLength);
}
void CDb3Mmap::SetPassword(LPCTSTR ptszPassword)
{
if (ptszPassword == NULL || *ptszPassword == 0) {
m_bUsesPassword = false;
m_crypto->setPassword(NULL);
}
else {
m_bUsesPassword = true;
m_crypto->setPassword(ptrA(mir_utf8encodeT(ptszPassword)));
}
UpdateMenuItem();
}
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