GateKeeper.cpp
author Volker Birk <vb@pep-project.org>
Sat, 02 Jul 2016 23:59:59 +0200
changeset 138 053a45ab31e6
parent 137 58bb251fab53
child 139 70232b0fba50
permissions -rw-r--r--
bugfix: RegEnumValue
vb@88
     1
#include "stdafx.h"
vb@88
     2
vb@88
     3
#include "GateKeeper.h"
vb@110
     4
#include "pEpCOMServerAdapter.h"
vb@123
     5
#include "utf8_helper.h"
vb@88
     6
vb@88
     7
using namespace std;
vb@88
     8
vb@130
     9
// from https://msdn.microsoft.com/en-us/library/windows/desktop/dd388945(v=vs.85).aspx
vb@123
    10
vb@123
    11
struct PUBLIC_KEY_VALUES {
vb@123
    12
    BLOBHEADER blobheader;
vb@123
    13
    RSAPUBKEY rsapubkey;
vb@123
    14
    BYTE modulus[4096];
vb@123
    15
};
vb@123
    16
vb@123
    17
static void ReverseMemCopy(
vb@123
    18
    _Out_ BYTE       *pbDest,
vb@123
    19
    _In_  BYTE const *pbSource,
vb@123
    20
    _In_  DWORD       cb
vb@123
    21
    )
vb@123
    22
{
vb@123
    23
    for (DWORD i = 0; i < cb; i++) {
vb@123
    24
        pbDest[cb - 1 - i] = pbSource[i];
vb@123
    25
    }
vb@123
    26
}
vb@123
    27
vb@123
    28
static NTSTATUS ImportRsaPublicKey(
vb@123
    29
    _In_ BCRYPT_ALG_HANDLE  hAlg,    // CNG provider
vb@123
    30
    _In_ PUBLIC_KEY_VALUES *pKey,    // Pointer to the RSAPUBKEY blob.
vb@123
    31
    _In_ BCRYPT_KEY_HANDLE *phKey    // Receives a handle the imported public key.
vb@123
    32
    )
vb@123
    33
{
vb@123
    34
    NTSTATUS hr = 0;
vb@123
    35
vb@123
    36
    BYTE *pbPublicKey = NULL;
vb@123
    37
    DWORD cbKey = 0;
vb@123
    38
vb@123
    39
    // Layout of the RSA public key blob:
vb@123
    40
vb@123
    41
    //  +----------------------------------------------------------------+
vb@123
    42
    //  |     BCRYPT_RSAKEY_BLOB    | BE( dwExp ) |   BE( Modulus )      |
vb@123
    43
    //  +----------------------------------------------------------------+
vb@123
    44
    //
vb@123
    45
    //  sizeof(BCRYPT_RSAKEY_BLOB)       cbExp           cbModulus 
vb@123
    46
    //  <--------------------------><------------><---------------------->
vb@123
    47
    //
vb@123
    48
    //   BE = Big Endian Format                                                     
vb@123
    49
vb@123
    50
    DWORD cbModulus = (pKey->rsapubkey.bitlen + 7) / 8;
vb@123
    51
    DWORD dwExp = pKey->rsapubkey.pubexp;
vb@123
    52
    DWORD cbExp = (dwExp & 0xFF000000) ? 4 :
vb@123
    53
        (dwExp & 0x00FF0000) ? 3 :
vb@123
    54
        (dwExp & 0x0000FF00) ? 2 : 1;
vb@123
    55
vb@123
    56
    BCRYPT_RSAKEY_BLOB *pRsaBlob;
vb@123
    57
    PBYTE pbCurrent;
vb@123
    58
vb@123
    59
    if (!SUCCEEDED(hr = DWordAdd(cbModulus, sizeof(BCRYPT_RSAKEY_BLOB), &cbKey))) {
vb@123
    60
        goto cleanup;
vb@123
    61
    }
vb@123
    62
vb@123
    63
    cbKey += cbExp;
vb@123
    64
vb@123
    65
    pbPublicKey = (PBYTE) CoTaskMemAlloc(cbKey);
vb@123
    66
    if (pbPublicKey == NULL) {
vb@123
    67
        hr = E_OUTOFMEMORY;
vb@123
    68
        goto cleanup;
vb@123
    69
    }
vb@123
    70
vb@123
    71
    ZeroMemory(pbPublicKey, cbKey);
vb@123
    72
    pRsaBlob = (BCRYPT_RSAKEY_BLOB *) (pbPublicKey);
vb@123
    73
vb@123
    74
    //
vb@123
    75
    // Make the Public Key Blob Header
vb@123
    76
    //
vb@123
    77
vb@123
    78
    pRsaBlob->Magic = BCRYPT_RSAPUBLIC_MAGIC;
vb@123
    79
    pRsaBlob->BitLength = pKey->rsapubkey.bitlen;
vb@123
    80
    pRsaBlob->cbPublicExp = cbExp;
vb@123
    81
    pRsaBlob->cbModulus = cbModulus;
vb@123
    82
    pRsaBlob->cbPrime1 = 0;
vb@123
    83
    pRsaBlob->cbPrime2 = 0;
vb@123
    84
vb@123
    85
    pbCurrent = (PBYTE) (pRsaBlob + 1);
vb@123
    86
vb@123
    87
    //
vb@123
    88
    // Copy pubExp Big Endian 
vb@123
    89
    //
vb@123
    90
vb@123
    91
    ReverseMemCopy(pbCurrent, (PBYTE) &dwExp, cbExp);
vb@123
    92
    pbCurrent += cbExp;
vb@123
    93
vb@123
    94
    //
vb@123
    95
    // Copy Modulus Big Endian 
vb@123
    96
    //
vb@123
    97
vb@123
    98
    ReverseMemCopy(pbCurrent, pKey->modulus, cbModulus);
vb@123
    99
vb@123
   100
    //
vb@123
   101
    // Import the public key
vb@123
   102
    //
vb@123
   103
vb@123
   104
    hr = BCryptImportKeyPair(hAlg, NULL, BCRYPT_RSAPUBLIC_BLOB, phKey, (PUCHAR) pbPublicKey, cbKey, 0);
vb@123
   105
vb@123
   106
cleanup:
vb@123
   107
    CoTaskMemFree(pbPublicKey);
vb@123
   108
    return hr;
vb@123
   109
}
vb@123
   110
vb@96
   111
namespace pEp {
vb@96
   112
vb@96
   113
    const LPCTSTR GateKeeper::plugin_reg_path = _T("Software\\Microsoft\\Office\\Outlook\\Addins\\pEp");
vb@96
   114
    const LPCTSTR GateKeeper::plugin_reg_value_name = _T("LoadBehavior");
vb@135
   115
    const LPCTSTR GateKeeper::updater_reg_path = _T("Software\\pEp\\Updater");
vb@96
   116
vb@96
   117
    const time_t GateKeeper::cycle = 7200;   // 7200 sec is 2 h
vb@137
   118
    const time_t GateKeeper::fraction = 10;  // first update is at 10% of cycle
vb@96
   119
    const DWORD GateKeeper::waiting = 10000; // 10000 ms is 10 sec
vb@88
   120
vb@117
   121
    GateKeeper::GateKeeper(CpEpCOMServerAdapterModule * self)
vb@116
   122
        : _self(self), now(time(NULL)), next(now + time_diff()), hkUpdater(NULL), internet(NULL), hAES(NULL), hRSA(NULL)
vb@96
   123
    {
vb@96
   124
        LONG lResult = RegOpenCurrentUser(KEY_READ, &cu);
vb@96
   125
        assert(lResult == ERROR_SUCCESS);
vb@96
   126
        if (lResult == ERROR_SUCCESS)
vb@96
   127
            cu_open = true;
vb@96
   128
        else
vb@96
   129
            cu_open = false;
vb@88
   130
vb@96
   131
        if (cu_open) {
vb@96
   132
            LONG lResult = RegOpenKeyEx(cu, updater_reg_path, 0, KEY_READ, &hkUpdater);
vb@96
   133
            assert(lResult == ERROR_SUCCESS);
vb@96
   134
            if (lResult != ERROR_SUCCESS)
vb@96
   135
                return;
vb@96
   136
        }
vb@96
   137
    }
vb@96
   138
    
vb@96
   139
    GateKeeper::~GateKeeper()
vb@96
   140
    {
vb@96
   141
        if (cu_open) {
vb@96
   142
            if (hkUpdater)
vb@96
   143
                RegCloseKey(hkUpdater);
vb@96
   144
            RegCloseKey(cu);
vb@96
   145
        }
vb@96
   146
    }
vb@88
   147
vb@96
   148
    time_t GateKeeper::time_diff()
vb@96
   149
    {
vb@96
   150
        try {
vb@96
   151
            static random_device rd;
vb@96
   152
            static mt19937 gen(rd());
vb@88
   153
vb@137
   154
            uniform_int_distribution<time_t> dist(0, cycle/fraction);
vb@96
   155
vb@96
   156
            return dist(gen);
vb@96
   157
        }
vb@96
   158
        catch (exception&) {
vb@96
   159
            assert(0);
vb@96
   160
            return 0;
vb@96
   161
        }
vb@88
   162
    }
vb@96
   163
vb@96
   164
    void GateKeeper::keep()
vb@96
   165
    {
vb@96
   166
        if (!cu_open)
vb@96
   167
            return;
vb@96
   168
vb@96
   169
        while (1) {
vb@96
   170
            keep_plugin();
vb@96
   171
vb@96
   172
            now = time(NULL);
vb@96
   173
            assert(now != -1);
vb@96
   174
vb@134
   175
            if (now > next) {
vb@96
   176
                next = now + GateKeeper::cycle;
vb@96
   177
                keep_updated();
vb@134
   178
            }
vb@96
   179
vb@96
   180
            Sleep(waiting);
vb@96
   181
        }
vb@88
   182
    }
vb@96
   183
vb@96
   184
    void GateKeeper::keep_plugin()
vb@96
   185
    {
vb@110
   186
        while (!_self->m_bComInitialized)
vb@110
   187
            Sleep(1);
vb@110
   188
vb@96
   189
        DWORD value;
vb@96
   190
        DWORD size;
vb@88
   191
vb@96
   192
        LONG lResult = RegGetValue(cu, plugin_reg_path, plugin_reg_value_name, RRF_RT_REG_DWORD, NULL, &value, &size);
vb@96
   193
        if (lResult != ERROR_SUCCESS)
vb@96
   194
            return;
vb@96
   195
vb@96
   196
        if (value != 3) {
vb@96
   197
            lResult = RegSetValue(cu, plugin_reg_path, RRF_RT_REG_DWORD, plugin_reg_value_name, 3);
vb@96
   198
            assert(lResult == ERROR_SUCCESS);
vb@96
   199
        }
vb@96
   200
    }
vb@96
   201
vb@111
   202
    string GateKeeper::update_key()
vb@110
   203
    {
vb@110
   204
        static string key;
vb@110
   205
vb@110
   206
        if (key.length() == 0) {
vb@110
   207
            HRSRC res = FindResource(_self->hModule(), MAKEINTRESOURCE(IRD_UPDATEKEY), RT_RCDATA);
vb@110
   208
            assert(res);
vb@110
   209
            if (!res)
vb@110
   210
                throw runtime_error("FindResource: IRD_UPDATEKEY");
vb@110
   211
vb@110
   212
            HGLOBAL hRes = LoadResource(_self->hModule(), res);
vb@110
   213
            assert(hRes);
vb@110
   214
            if (!hRes)
vb@110
   215
                throw runtime_error("LoadResource: IRD_UPDATEKEY");
vb@110
   216
vb@110
   217
            key = string((char *)LockResource(hRes), SizeofResource(_self->hModule(), res));
vb@110
   218
            UnlockResource(hRes);
vb@110
   219
        }
vb@110
   220
vb@110
   221
        return key;
vb@110
   222
    }
vb@110
   223
vb@116
   224
    BCRYPT_KEY_HANDLE GateKeeper::delivery_key()
vb@112
   225
    {
vb@112
   226
        aeskey_t key;
vb@112
   227
vb@112
   228
        static random_device rd;
vb@112
   229
        static mt19937 gen(rd());
vb@112
   230
vb@123
   231
        uniform_int_distribution<int64_t> dist(0, UINT32_MAX);
vb@112
   232
vb@123
   233
        for (int i = 0; i < 8; i++)
vb@123
   234
            key.dw_key[i] = (uint32_t) dist(gen);
vb@113
   235
vb@116
   236
        BCRYPT_KEY_HANDLE hKey;
vb@116
   237
        NTSTATUS status = BCryptGenerateSymmetricKey(hAES, &hKey, NULL, 0, (PUCHAR) &key, (ULONG) sizeof(aeskey_t), 0);
vb@116
   238
        assert(status == 0);
vb@116
   239
        if (status)
vb@116
   240
            throw runtime_error("BCryptGenerateSymmetricKey");
vb@116
   241
vb@131
   242
        DWORD keylength = 0;
vb@131
   243
        ULONG copied = 0;
vb@131
   244
        status = BCryptGetProperty(hKey, BCRYPT_KEY_LENGTH, (PUCHAR) &keylength, sizeof(DWORD), &copied, 0);
vb@131
   245
        assert(keylength == 256);
vb@131
   246
vb@116
   247
        return hKey;
vb@113
   248
    }
vb@113
   249
vb@121
   250
    string GateKeeper::wrapped_delivery_key(BCRYPT_KEY_HANDLE hDeliveryKey)
vb@113
   251
    {
vb@113
   252
        string result;
vb@113
   253
vb@116
   254
        BCRYPT_KEY_HANDLE hUpdateKey;
vb@117
   255
        string _update_key = update_key();
vb@113
   256
vb@123
   257
        PCERT_PUBLIC_KEY_INFO uk;
vb@123
   258
        DWORD uk_size;
vb@123
   259
        BOOL bResult = CryptDecodeObjectEx(X509_ASN_ENCODING, X509_PUBLIC_KEY_INFO,
vb@123
   260
                (const BYTE *) _update_key.data(), _update_key.size(), CRYPT_DECODE_ALLOC_FLAG, NULL, &uk, &uk_size);
vb@123
   261
        if (!bResult)
vb@123
   262
            throw runtime_error("CryptDecodeObjectEx: X509_PUBLIC_KEY_INFO");
vb@123
   263
vb@123
   264
        PUBLIC_KEY_VALUES *_uk;
vb@123
   265
        DWORD _uk_size;
vb@123
   266
        bResult = CryptDecodeObjectEx(X509_ASN_ENCODING, RSA_CSP_PUBLICKEYBLOB,
vb@123
   267
            uk->PublicKey.pbData, uk->PublicKey.cbData, CRYPT_DECODE_ALLOC_FLAG, NULL, &_uk, &_uk_size);
vb@123
   268
        LocalFree(uk);
vb@123
   269
        if (!bResult)
vb@123
   270
            throw runtime_error("CryptDecodeObjectEx: X509_PUBLIC_KEY_INFO");
vb@123
   271
vb@123
   272
        HRESULT hResult = ImportRsaPublicKey(hRSA, _uk, &hUpdateKey);
vb@123
   273
        LocalFree(_uk);
vb@123
   274
        if (hResult)
vb@123
   275
            throw runtime_error("ImportRsaPublicKey");
vb@117
   276
vb@129
   277
        ULONG psize;
vb@129
   278
        NTSTATUS status = BCryptGetProperty(hUpdateKey, BCRYPT_ALGORITHM_NAME, NULL, 0, &psize, 0);
vb@129
   279
        char *prop = new char[psize];
vb@129
   280
        TCHAR *_prop = (TCHAR *) prop;
vb@129
   281
        BCryptGetProperty(hUpdateKey, BCRYPT_ALGORITHM_NAME, (PUCHAR) prop, psize, &psize, 0);
vb@129
   282
vb@129
   283
        ULONG export_size;
vb@129
   284
        status = BCryptExportKey(hDeliveryKey, NULL, BCRYPT_KEY_DATA_BLOB, NULL, NULL,
vb@129
   285
            &export_size, 0);
vb@129
   286
        if (status)
vb@129
   287
            throw runtime_error("BCryptExportKey: measuring export size");
vb@129
   288
vb@129
   289
        PUCHAR _delivery_key = new UCHAR[export_size];
vb@120
   290
        ULONG copied;
vb@129
   291
        status = BCryptExportKey(hDeliveryKey, NULL, BCRYPT_KEY_DATA_BLOB, _delivery_key, export_size,
vb@123
   292
                &copied, 0);
vb@129
   293
        if (status) {
vb@129
   294
            delete[] _delivery_key;
vb@120
   295
            throw runtime_error("BCryptExportKey: delivery_key");
vb@129
   296
        }
vb@120
   297
vb@117
   298
        BCRYPT_OAEP_PADDING_INFO pi;
vb@119
   299
        memset(&pi, 0, sizeof(BCRYPT_OAEP_PADDING_INFO));
vb@117
   300
        pi.pszAlgId = BCRYPT_SHA256_ALGORITHM;
vb@117
   301
vb@117
   302
        ULONG result_size;
vb@118
   303
        PUCHAR _result = NULL;
vb@129
   304
        ULONG blob_size = export_size - sizeof(BCRYPT_KEY_DATA_BLOB_HEADER);
vb@129
   305
        PUCHAR blob = _delivery_key + sizeof(BCRYPT_KEY_DATA_BLOB_HEADER);
vb@129
   306
        status = BCryptEncrypt(hUpdateKey, blob, blob_size, &pi, NULL, 0, NULL, 0, &result_size, BCRYPT_PAD_OAEP);
vb@119
   307
        if (status) {
vb@129
   308
            delete[] _delivery_key;
vb@119
   309
            BCryptDestroyKey(hUpdateKey);
vb@117
   310
            throw runtime_error("BCryptEncrypt: calculating result size");
vb@119
   311
        }
vb@117
   312
vb@117
   313
        _result = new UCHAR[result_size];
vb@129
   314
        status = BCryptEncrypt(hUpdateKey, blob, blob_size, &pi, NULL, 0, _result, result_size, &copied, BCRYPT_PAD_OAEP);
vb@129
   315
        delete[] _delivery_key;
vb@119
   316
        if (status) {
vb@119
   317
            BCryptDestroyKey(hUpdateKey);
vb@119
   318
            delete[] _result;
vb@118
   319
            throw runtime_error("BCryptEncrypt: encrypting using update_key");
vb@119
   320
        }
vb@117
   321
vb@120
   322
        BCryptDestroyKey(hUpdateKey);
vb@120
   323
vb@117
   324
        stringstream s;
vb@129
   325
        for (ULONG i = 0; i < copied; i++) {
vb@129
   326
            s << hex << setw(2) << setfill('0');
vb@118
   327
            s << (int) _result[i];
vb@129
   328
        }
vb@117
   329
        delete[] _result;
vb@117
   330
        s >> result;
vb@117
   331
vb@113
   332
        return result;
vb@112
   333
    }
vb@112
   334
vb@96
   335
    GateKeeper::product_list& GateKeeper::registered_products()
vb@96
   336
    {
vb@96
   337
        static product_list products;
vb@88
   338
vb@96
   339
        // https://msdn.microsoft.com/en-us/library/windows/desktop/ms724872(v=vs.85).aspx
vb@138
   340
        TCHAR value_name[16384];
vb@96
   341
        DWORD value_name_size;
vb@138
   342
        TCHAR value[L_MAX_URL_LENGTH + 1];
vb@96
   343
        DWORD value_size;
vb@88
   344
vb@96
   345
        products.empty();
vb@96
   346
vb@96
   347
        LONG lResult = ERROR_SUCCESS;
vb@96
   348
        for (DWORD i = 0; lResult == ERROR_SUCCESS; i++) {
vb@138
   349
            value_name_size = 16383;
vb@96
   350
            value_size = L_MAX_URL_LENGTH + 1;
vb@96
   351
            lResult = RegEnumValue(hkUpdater, 0, value_name, &value_name_size, NULL, NULL, (LPBYTE) value, &value_size);
vb@96
   352
            if (lResult == ERROR_SUCCESS)
vb@96
   353
                products.push_back({ value_name, value });
vb@88
   354
        }
vb@88
   355
vb@96
   356
        return products;
vb@88
   357
    }
vb@88
   358
vb@126
   359
    void GateKeeper::install_msi(tstring filename)
vb@126
   360
    {
vb@134
   361
        ShellExecute(NULL, _T("open"), filename.c_str(), NULL, NULL, SW_SHOW);
vb@126
   362
    }
vb@126
   363
vb@97
   364
    void GateKeeper::update_product(product p, DWORD context)
vb@96
   365
    {
vb@127
   366
        BCRYPT_KEY_HANDLE dk = delivery_key();
vb@126
   367
#ifdef UNICODE
vb@127
   368
        tstring delivery = utility::utf16_string(wrapped_delivery_key(dk));
vb@126
   369
#else
vb@126
   370
        tstring delivery = wrapped_delivery_key(delivery_key());
vb@126
   371
#endif
vb@124
   372
        tstring url = p.second;
vb@124
   373
        url += _T("&challenge=");
vb@124
   374
        url += delivery;
vb@124
   375
        tstring headers;
vb@124
   376
        HINTERNET hUrl = InternetOpenUrl(internet, url.c_str(), headers.c_str(), headers.length(),
vb@97
   377
                INTERNET_FLAG_EXISTING_CONNECT | INTERNET_FLAG_NO_UI | INTERNET_FLAG_SECURE, context);
vb@97
   378
        if (hUrl == NULL)
vb@97
   379
            return;
vb@94
   380
vb@127
   381
        string crypted;
vb@127
   382
        string unencrypted;
vb@133
   383
        UCHAR iv[12];
vb@133
   384
        UCHAR nonce[sizeof(iv)];
vb@133
   385
        UCHAR tag[16];
vb@138
   386
        tstring filename;
vb@138
   387
        HANDLE hFile = NULL;
vb@138
   388
        char *unencrypted_buffer = NULL;
vb@107
   389
vb@130
   390
        try {
vb@133
   391
            DWORD reading;
vb@133
   392
            InternetReadFile(hUrl, iv, sizeof(iv), &reading);
vb@133
   393
vb@133
   394
            if (reading) do {
vb@130
   395
                static char buffer[1024*1024];
vb@130
   396
                BOOL bResult = InternetReadFile(hUrl, buffer, 1024*1024, &reading);
vb@130
   397
                if (!bResult || !reading)
vb@130
   398
                    break;
vb@130
   399
                crypted += string(buffer, reading);
vb@130
   400
            } while (1);
vb@130
   401
        }
vb@138
   402
        catch (exception&) {
vb@138
   403
            goto closing;
vb@130
   404
        }
vb@133
   405
vb@97
   406
        InternetCloseHandle(hUrl);
vb@126
   407
        hUrl = NULL;
vb@126
   408
vb@133
   409
        memcpy(nonce, iv, sizeof(iv));
vb@133
   410
vb@130
   411
        BCRYPT_AUTHENTICATED_CIPHER_MODE_INFO authInfo;
vb@130
   412
        BCRYPT_INIT_AUTH_MODE_INFO(authInfo);
vb@130
   413
        authInfo.pbNonce = nonce;
vb@130
   414
        authInfo.cbNonce = sizeof(nonce);
vb@133
   415
        authInfo.pbTag = tag;
vb@133
   416
        authInfo.cbTag = sizeof(tag);
vb@128
   417
vb@127
   418
        ULONG unencrypted_size;
vb@127
   419
        NTSTATUS status = BCryptDecrypt(dk, (PUCHAR) crypted.data(), crypted.size(),
vb@131
   420
                &authInfo, iv, sizeof(iv), NULL, 0, &unencrypted_size, 0);
vb@127
   421
        if (status)
vb@127
   422
            goto closing;
vb@127
   423
        
vb@127
   424
        unencrypted_buffer = new char[unencrypted_size];
vb@131
   425
        PUCHAR crypted_data = (PUCHAR) crypted.data();
vb@133
   426
        ULONG crypted_size = (ULONG) crypted.size() - sizeof(tag);
vb@133
   427
        memcpy(tag, crypted_data + crypted_size, sizeof(tag));
vb@133
   428
vb@131
   429
        status = BCryptDecrypt(dk, crypted_data, crypted_size,
vb@133
   430
            &authInfo, iv, sizeof(iv), (PUCHAR) unencrypted_buffer, unencrypted_size, &unencrypted_size, 0);
vb@129
   431
        if (status)
vb@127
   432
            goto closing;
vb@127
   433
vb@134
   434
        BCryptDestroyKey(dk);
vb@134
   435
vb@127
   436
        TCHAR temp_path[MAX_PATH + 1];
vb@127
   437
        GetTempPath(MAX_PATH, temp_path);
vb@127
   438
        filename = temp_path;
vb@127
   439
        filename += _T("\\pEp_");
vb@127
   440
        filename += delivery.substr(0, 32);
vb@127
   441
        filename += _T(".msi");
vb@127
   442
vb@127
   443
        hFile = CreateFile(filename.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
vb@127
   444
        if (!hFile)
vb@127
   445
            goto closing;
vb@127
   446
        DWORD writing;
vb@127
   447
        WriteFile(hFile, unencrypted_buffer, unencrypted_size, &writing, NULL);
vb@127
   448
        CloseHandle(hFile);
vb@127
   449
vb@126
   450
        install_msi(filename);
vb@127
   451
vb@126
   452
        return;
vb@126
   453
vb@126
   454
    closing:
vb@127
   455
        if (unencrypted_buffer)
vb@127
   456
            delete[] unencrypted_buffer;
vb@126
   457
        if (hFile)
vb@126
   458
            CloseHandle(hFile);
vb@126
   459
        if (hUrl)
vb@126
   460
            InternetCloseHandle(hUrl);
vb@127
   461
        BCryptDestroyKey(dk);
vb@96
   462
    }
vb@88
   463
vb@96
   464
    void GateKeeper::keep_updated()
vb@96
   465
    {
vb@116
   466
        NTSTATUS status = BCryptOpenAlgorithmProvider(&hAES, BCRYPT_AES_ALGORITHM, MS_PRIMITIVE_PROVIDER, 0);
vb@116
   467
        assert(status == 0);
vb@116
   468
        if (status)
vb@116
   469
            goto closing;
vb@130
   470
        status = BCryptSetProperty(hAES, BCRYPT_CHAINING_MODE, (PUCHAR) BCRYPT_CHAIN_MODE_GCM, sizeof(BCRYPT_CHAIN_MODE_GCM), 0);
vb@128
   471
        if (status)
vb@128
   472
            goto closing;
vb@116
   473
vb@116
   474
        status = BCryptOpenAlgorithmProvider(&hRSA, BCRYPT_RSA_ALGORITHM, MS_PRIMITIVE_PROVIDER, 0);
vb@116
   475
        assert(status == 0);
vb@116
   476
        if (status)
vb@116
   477
            goto closing;
vb@116
   478
vb@124
   479
        internet = InternetOpen(_T("pEp"), INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
vb@124
   480
        if (!internet)
vb@124
   481
            goto closing;
vb@97
   482
vb@96
   483
        product_list& products = registered_products();
vb@97
   484
        DWORD context = 0;
vb@138
   485
vb@96
   486
        for (auto i = products.begin(); i != products.end(); i++) {
vb@126
   487
            try {
vb@126
   488
                update_product(*i, context++);
vb@126
   489
            }
vb@126
   490
            catch (exception&) {
vb@126
   491
            
vb@126
   492
            }
vb@96
   493
        }
vb@97
   494
vb@116
   495
    closing:
vb@116
   496
        if (internet)
vb@116
   497
            InternetCloseHandle(internet);
vb@116
   498
        if (hAES)
vb@116
   499
            BCryptCloseAlgorithmProvider(hAES, 0);
vb@116
   500
        if (hRSA)
vb@116
   501
            BCryptCloseAlgorithmProvider(hRSA, 0);
vb@97
   502
        internet = NULL;
vb@116
   503
        hAES = NULL;
vb@116
   504
        hRSA = NULL;
vb@96
   505
    }
vb@88
   506
vb@96
   507
} // namespace pEp