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/*
WhatsAppWeb plugin for Miranda NG
Copyright © 2019-20 George Hazan
*/
#include "stdafx.h"
class CWhatsAppQRDlg : public CProtoDlgBase<WhatsAppProto>
{
public:
CWhatsAppQRDlg(WhatsAppProto *ppro) :
CProtoDlgBase<WhatsAppProto>(ppro, IDD_SHOWQR)
{}
void SetData(const CMStringA &str)
{
auto *pQR = QRcode_encodeString(str, 0, QR_ECLEVEL_L, QR_MODE_8, 1);
HWND hwndRc = GetDlgItem(m_hwnd, IDC_QRPIC);
RECT rc;
GetClientRect(hwndRc, &rc);
::SetForegroundWindow(m_hwnd);
int scale = 8; // (rc.bottom - rc.top) / pQR->width;
int rowLen = pQR->width * scale * 3;
if (rowLen % 4)
rowLen = (rowLen / 4 + 1) * 4;
int dataLen = rowLen * pQR->width * scale;
mir_ptr<BYTE> pData((BYTE *)mir_alloc(dataLen));
if (pData == nullptr) {
QRcode_free(pQR);
return;
}
memset(pData, 0xFF, dataLen); // white background by default
const BYTE *s = pQR->data;
for (int y = 0; y < pQR->width; y++) {
BYTE *d = pData.get() + rowLen * y * scale;
for (int x = 0; x < pQR->width; x++) {
if (*s & 1)
for (int i = 0; i < scale; i++)
for (int j = 0; j < scale; j++) {
d[j * 3 + i * rowLen] = 0;
d[1 + j * 3 + i * rowLen] = 0;
d[2 + j * 3 + i * rowLen] = 0;
}
d += scale * 3;
s++;
}
}
BITMAPFILEHEADER fih = {};
fih.bfType = 0x4d42; // "BM"
fih.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dataLen;
fih.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
BITMAPINFOHEADER bih = {};
bih.biSize = sizeof(BITMAPINFOHEADER);
bih.biWidth = pQR->width * scale;
bih.biHeight = -bih.biWidth;
bih.biPlanes = 1;
bih.biBitCount = 24;
bih.biCompression = BI_RGB;
wchar_t wszTempPath[MAX_PATH], wszTempFile[MAX_PATH];
GetTempPathW(_countof(wszTempPath), wszTempPath);
GetTempFileNameW(wszTempPath, L"wa_", TRUE, wszTempFile);
FILE *f = _wfopen(wszTempFile, L"wb");
fwrite(&fih, sizeof(BITMAPFILEHEADER), 1, f);
fwrite(&bih, sizeof(BITMAPINFOHEADER), 1, f);
fwrite(pData, sizeof(unsigned char), dataLen, f);
fclose(f);
SendMessage(hwndRc, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)Image_Load(wszTempFile));
DeleteFileW(wszTempFile);
QRcode_free(pQR);
}
};
static INT_PTR __stdcall sttShowDialog(void *param)
{
WhatsAppProto *ppro = (WhatsAppProto *)param;
if (ppro->m_pQRDlg == nullptr) {
ppro->m_pQRDlg = new CWhatsAppQRDlg(ppro);
ppro->m_pQRDlg->Show();
}
else {
SetForegroundWindow(ppro->m_pQRDlg->GetHwnd());
SetActiveWindow(ppro->m_pQRDlg->GetHwnd());
}
return 0;
}
/////////////////////////////////////////////////////////////////////////////////////////
void WhatsAppProto::CloseQrDialog()
{
if (m_pQRDlg) {
m_pQRDlg->Close();
m_pQRDlg = nullptr;
}
}
bool WhatsAppProto::ShowQrCode(const CMStringA &ref)
{
MBinBuffer pubKey;
if (!getBlob(DBKEY_PUB_KEY, pubKey)) {
// generate new pair of private & public keys for this account
ec_key_pair *pKeys;
if (curve_generate_key_pair(g_plugin.pCtx, &pKeys))
return false;
auto *pPubKey = ec_key_pair_get_public(pKeys);
pubKey.append(pPubKey->data, sizeof(pPubKey->data));
db_set_blob(0, m_szModuleName, DBKEY_PUB_KEY, pPubKey->data, sizeof(pPubKey->data));
auto *pPrivKey = ec_key_pair_get_private(pKeys);
db_set_blob(0, m_szModuleName, DBKEY_PRIVATE_KEY, pPrivKey->data, sizeof(pPrivKey->data));
ec_key_pair_destroy(pKeys);
}
CallFunctionSync(sttShowDialog, this);
CMStringA szQrData(FORMAT, "%s,%s,%s", ref.c_str(), ptrA(mir_base64_encode(pubKey.data(), pubKey.length())).get(), m_szClientId.c_str());
m_pQRDlg->SetData(szQrData);
return true;
}
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