void* HiddenFunctions::CheckPointerFuncVoid(void* ptr, const char* file, size_t line, const char* func)
{
if (!ptr) {
throw WinApiError(E_POINTER, file, func, line);
}
return ptr;
}
bool HiddenFunctions::CheckApiThrowErrorFunc(bool r, DWORD err, const char* file, size_t line, const char* func)
{
if (!r) {
throw WinApiError(err, file, func, line);
}
return r;
}
CryptoImpl::~CryptoImpl()
{
if (NULL != provider)
{
if (!CryptReleaseContext(provider, 0))
{
LOG_ERR << "Error: " << WinApiError("CryptReleaseContext").what();
}
}
}
void
CryptoProxy::verifyCryptoAlgs()
{
bool isMd5Supported = false;
bool isSha1Supported = false;
bool isAesSupported = false;
DWORD flags = CRYPT_FIRST;
for (;;)
{
PROV_ENUMALGS algs;
DWORD dataLen = sizeof(algs);
if (!CryptGetProvParam(impl->provider, PP_ENUMALGS,
reinterpret_cast<BYTE*>(&algs), &dataLen, flags))
{
DWORD err = GetLastError();
if (err == ERROR_NO_MORE_ITEMS)
break; // finished
// another error - throw
throw WinApiError("CryptGetProvParams", err);
}
switch (algs.aiAlgid)
{
case CALG_MD5:
isMd5Supported = true;
break;
case CALG_SHA:
isSha1Supported = true;
break;
case CALG_AES_128:
isAesSupported = true;
break;
}
flags &= ~CRYPT_FIRST;
}
if (!isMd5Supported)
throw runtime_error("Crypto: MD5 is not supported");
if (!isSha1Supported)
throw runtime_error("Crypto: SHA-1 is not supported");
if (!isAesSupported)
throw runtime_error("Crypto: AES-128 is not supported");
}