我需要使用RijndaelManaged在C#中加密数据,并在C++代码中解密。
C#加密代码:
static string Encrypt(string plainText)
{
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
var keyBytes = new byte[] { /* ... 32 bytes of a key */};
byte[] iv = new byte[] { /* ... 16 bytes of IV */ };
var symmetricKey = new RijndaelManaged()
{
Mode = CipherMode.CBC,
Padding = PaddingMode.Zeros,
BlockSize = 128, // Must be 128 to be compatible with AES
KeySize = 256
};
var encryptor = symmetricKey.CreateEncryptor(keyBytes, iv);
byte[] cipherTextBytes;
using(var memoryStream = new MemoryStream())
{
using(var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
cipherTextBytes = memoryStream.ToArray();
cryptoStream.Close();
}
memoryStream.Close();
}
return Convert.ToBase64String(cipherTextBytes);
}
但是,当我在C++代码中尝试解密时,总是会收到CryptDecrypt的NTE_BAD_DATA响应。以下是C++代码(为了清晰起见,所有检查都已删除):
__declspec(dllexport) DWORD Decrypt(char* stringBuffer)
{
string encryptedString(stringBuffer);
// Decode base64 string to byte array. Works ok, the binary array is the same as the one in C# code.
vector<BYTE> encryptionBuffer = Base64::decode(encryptedString);
DWORD bufferSize = encryptionBuffer.size();
struct CryptoBlob {
BLOBHEADER header;
DWORD cbKeySize;
BYTE rgbKeyData[32];
} keyBlob;
keyBlob.header.bType = PLAINTEXTKEYBLOB;
keyBlob.header.bVersion = CUR_BLOB_VERSION;
keyBlob.header.reserved = 0;
keyBlob.header.aiKeyAlg = CALG_AES_256;
keyBlob.cbKeySize = 32;
BYTE keyData[32] = { /* 32 bytes of a key the same as in C# code */ };
BYTE ivData[16] = { /* 16 bytes of IV the same as in C# code */ };
memcpy(keyBlob.rgbKeyData, keyData, 32);
HCRYPTKEY hPubKey;
HCRYPTPROV hProv;
CryptAcquireContext(
&hProv,
NULL,
NULL,
PROV_RSA_AES,
CRYPT_VERIFYCONTEXT);
CryptImportKey(hProv, (const LPBYTE)&keyBlob, sizeof(keyBlob), 0, 0, &hPubKey);
CryptSetKeyParam(hPubKey, KP_IV, ivData, 0);
// Here the error happens, the value returned is 0x80090005 (NTE_BAD_DATA)
DWORD err = CryptDecrypt(hPubKey, 0, TRUE, 0, encryptionBuffer.data(), &bufferSize);
// overwrite the input buffer with decrypted data
memset(stringBuffer, 0, encryptedString.length());
memcpy(stringBuffer, encryptionBuffer.data(), bufferSize);
return 0;
}
有什么想法可能出了问题吗? 谢谢!
NTE_BAD_DATA
错误代码的注释)。 - Phil Brubaker