我正在尝试使用128BIT AES Decryption解密一些东西。当我尝试调用CryptDecrypt时,我收到一条错误,指出“指定了无效的算法”。使用此处发布的库时遇到同样的问题:http://www.codeproject.com/KB/security/WinAES.aspx
什么可能导致此错误?
我在vista64bit上使用CryptoAPI和visual studio 2008.我检查了注册表,AES库就在那里......
修改
BYTE*& encryptedData /* get data length */
HCRYPTPROV cryptoHandle = NULL;
HCRYPTKEY aesKeyHandle = NULL;
hr = InitWinCrypt(cryptoHandle);
if(FAILED(hr))
{
return hr;
}
AesKeyOffering aesKey = { {PLAINTEXTKEYBLOB, CUR_BLOB_VERSION, 0, CALG_AES_128}, 16, { 0xFF, 0x00, 0xFF, 0x1C, 0x1D, 0x1E, 0x03, 0x04, 0x05, 0x0F, 0x20, 0x21, 0xAD, 0xAF, 0xA4, 0x04 }};
if(CryptImportKey(cryptoHandle, (CONST BYTE*)&aesKey, sizeof(AesKeyOffering), NULL, 0, &aesKeyHandle) == FALSE)
{
// DO error
return HRESULT_FROM_WIN32(GetLastError());
}
if(CryptSetKeyParam(aesKeyHandle, KP_IV, { 0xFF, 0x00, 0xFF, 0x1C, 0x1D, 0x1E, 0x03, 0x04, 0x05, 0x0F, 0x20, 0x21, 0xAD, 0xAF, 0xA4, 0x04 } , 0) == FALSE)
{
return HRESULT_FROM_WIN32(GetLastError());
}
BYTE blah2 = CRYPT_MODE_CBC;
// set block mode
if(CryptSetKeyParam(aesKeyHandle, KP_MODE, &blah2, 0) == FALSE)
{
//
return HRESULT_FROM_WIN32(GetLastError());
}
DWORD lol = dataLength / 16 + 1;
DWORD lol2 = lol * 16;
if(CryptDecrypt(aesKeyHandle, 0, TRUE, 0, encryptedData, &lol2) == FALSE)
{
return HRESULT_FROM_WIN32(GetLastError());
}
InitWinCrypt函数
if(!CryptAcquireContextW(&cryptoHandle, NULL, L"Microsoft Enhanced RSA and AES Cryptographic Provider", PROV_RSA_AES, CRYPT_VERIFYCONTEXT))
{
if(!CryptAcquireContextW(&cryptoHandle, NULL, L"Microsoft Enhanced RSA and AES Cryptographic Provider", PROV_RSA_AES, 0))
{
return HRESULT_FROM_WIN32(GetLastError());
}
else
{
return S_OK;
}
}
return S_OK;
AesOffering struct:
struct AesKeyOffering
{
BLOBHEADER m_Header;
DWORD m_KeyLength;
BYTE Key[16];
};
EDIT2
重新启动计算机后,重新启动CBC块。我现在收到错误的数据错误。数据在C#中解密很好。但我需要使用wincrypt来做到这一点。
答案 0 :(得分:1)
您是否通过cryptoHandle
提及InitWithCrypt
?如果没有,您的代码
if(!CryptAcquireContextW(&cryptoHandle, ...
只会修改InitWinCrypt
的{{1}}副本。
编辑:鉴于它确实如此,请尝试删除设置cryptoHandle
CryptSetKeyParam
来电