这是一个Windows操作系统错误代码,通常表示无法解密数据,可能由于密钥不正确或数据已被破坏等原因。如果出现此错误,请确保您正在使用正确的密钥进行解密,并确定要解密的数据没有被损坏或篡改。
以下是示例代码,可帮助您正确使用BCryptDecrypt API并避免此错误:
#include
#include
void DecryptData(void* pData, DWORD dwDataSize, void* pKey, DWORD dwKeySize)
{
BCRYPT_ALG_HANDLE hAesAlg = NULL;
BCRYPT_KEY_HANDLE hKey = NULL;
PVOID pAllocatedMem = NULL;
try
{
// Open an algorithm handle for the AES cipher.
if (!NT_SUCCESS(
BCryptOpenAlgorithmProvider(&hAesAlg, BCRYPT_AES_ALGORITHM, NULL, 0)))
{
throw std::exception("BCryptOpenAlgorithmProvider failed.");
}
// Allocate memory for the key object on the heap.
pAllocatedMem = malloc(BCRYPT_AES_KEY_OBJECT_LENGTH);
// Generate the key from supplied input key bytes.
if (!NT_SUCCESS(
BCryptGenerateSymmetricKey(hAesAlg, &hKey, pAllocatedMem,
BCRYPT_AES_KEY_OBJECT_LENGTH, pKey, dwKeySize, 0)))
{
throw std::exception("BCryptGenerateSymmetricKey failed.");
}
// Decrypt the supplied data.
if (!NT_SUCCESS(
BCryptDecrypt(hKey, reinterpret_cast(pData), dwDataSize,
NULL, NULL, 0, reinterpret_cast(pData), dwDataSize, NULL)))
{
throw std::exception("BCryptDecrypt failed.");
}
BCryptDestroyKey(hKey);
BCryptCloseAlgorithmProvider(hAesAlg);
free(pAllocatedMem);
}
catch (std::exception ex)
{
// Clean up allocated resources.
if (hKey) BCryptDestroyKey(hKey);
if (hAesAlg) BCryptCloseAlgorithmProvider(hAesAlg);
if (pAllocatedMem) free(pAllocatedMem);
// Rethrow the exception.
throw ex;
}
}
请注意,上述代码使用C++异常处理程序来处理错误,但您可以根据您自己的要求进行修改。另外,此示例假定您已经有效地从数据源和密钥源中提取了有效数据并将其传递给`