Ncryptopenstorageprovider — New

In third-party wrappers (like the popular Ncrypt.Sdk or internal enterprise libraries), you might see a method explicitly named:

// 3. Decrypt using the isolated key DWORD dwResult = 0; ss = NCryptDecrypt(hKey, pCipherText, cbCipherText, NULL, NULL, 0, &dwResult, NCRYPT_SILENT_FLAG); // ... allocate buffer and decrypt ...

HRESULT DecryptConnectionString(const BYTE* pCipherText, DWORD cbCipherText, BYTE** ppPlainText) NCRYPT_PROV_HANDLE hProvider = NULL; NCRYPT_KEY_HANDLE hKey = NULL; HRESULT hr = E_FAIL; // 1. Open a NEW, isolated storage provider SECURITY_STATUS ss = NCryptOpenStorageProvider(&hProvider, L"MyCustomHSMProvider", NCRYPT_SILENT_FLAG); if (ss != ERROR_SUCCESS) return HRESULT_FROM_NT(ss);