所以我一直在努力解决这个问题。我正在尝试制作自己的 AES 128 库以与我的一个程序一起使用。该库测试并在 C++ 中工作（对于 encrypt 函数很好。我还没有实现其他函数）“Encrypt”函数是这样的：
新代码
void Aes128Class::EncryptBlock(BYTE* outBlock, const BYTE* inBlock, const BYTE* cipherBlock)
{
BYTE temp[16] = {0x00};
Galois::XorBlock(temp, inBlock);
Galois::XorBlock(temp, cipherBlock);
BYTE expandedKey[176] = {0x00};
memcpy(expandedKey, Key, 16);
Galois::expand_key(expandedKey);
Galois::XorBlock(temp, expandedKey);
for(int i=16; i<160; i+=16)
{
Galois::DoRound(temp, &expandedKey[i]);
}
Galois::SubBytes(temp);
Galois::ShiftRows(temp);
Galois::XorBlock(temp, &expandedKey[160]);
memcpy(outBlock, temp, 16);
}
void Aes128Class::EncryptData(BYTE* outBlock, size_t& outlen, const BYTE* inBlock, size_t length)
{
float blockSize = (float)(length/16);
blockSize = ceilf(blockSize);
int newLength = (int)(blockSize*16);
BYTE* temp = (BYTE*)malloc(newLength);
BYTE* padd = (BYTE*)malloc(newLength);
memset(temp, 0, newLength);
memcpy(padd, inBlock, length);
EncryptBlock(temp, padd, IV);
for (int i=1; i<blockSize; i++)
{
EncryptBlock(&temp[i*16], &padd[i*16], &temp[(i-1)*16]);
}
outlen = newLength;
memcpy(outBlock, temp, newLength);
}
这个想法是，如果plainText不是 16 字节块增量，那么我强制它是。所以这形成了一个可变大小的字节数组。它在我的C++测试中有效，但是当我调用它时，C#我得到了一些不同的错误......这需要一分钟来描述。
[DllImport("CppAes128.dll", CallingConvention = CallingConvention.ThisCall,
EntryPoint = "?EncryptData@Aes128Class@@QAEXPAEAAIPBEI@Z")]
static extern void EncryptData(IntPtr pClass, ref IntPtr outblock, [Out]int OutLength, byte[] inBlock, int length);
当我调用它时，我得到了指向array和 outlength 的有效指针。它现在看起来的方式会导致访问冲突，但如果我更改[Out]int OutLength为ref IntPtr. 有趣的是，如果我这样做ref int或者ref uint它仍然“有效”。因此，如果我这样做，我会尝试阅读intptr，然后我会遇到访问冲突。我正在将其编译为x86 projectin .NET 4.0（因为我在某处读到 3.5 有一些访问错误......）
这是我尝试过的C#。因为我玩了几个小时，所以有点乱码（抱歉）：
public byte[] EncryptData(byte[] plainText, int length)
{
byte[] enc = null;
int len = 0;
IntPtr pArray = IntPtr.Zero;
EncryptData(theClass, ref pArray, len, plainText, length);
Console.WriteLine(len);
//enc = new byte[len];
//Marshal.Copy(pArray, enc, 0, len);
//Marshal.Release(pArray);
//try
//{
// int elementSize = Marshal.SizeOf(typeof(IntPtr));
// //IntPtr unmanagedArray = Marshal.AllocHGlobal(10 * elementSize);
// Console.WriteLine("Reading unmanaged memory:");
// // Print the 10 elements of the C-style unmanagedArray
// for (int i = 0; i < 10; i++)
// {
// Console.WriteLine("{0:X2}:", Marshal.ReadByte(pArray, i));
// }
// Marshal.FreeHGlobal(pArray);
//}
//catch (Exception ex)
//{
// Console.WriteLine("{0}\n{1}", ex.Source, ex.Message);
// Console.WriteLine("Win32({0})", Marshal.GetLastWin32Error());
//}
//Marshal.Release(pArray);
return enc;
}
唯一有效的时候是我刚刚制作了一个静态大小的数组并且没有使用ref或marshal复制或任何东西..我认为我的签名是这样的
static extern void EncryptData(IntPtr pClass, byte[] outBlock, byte[] inBlock, int length);
这几乎奏效了，但问题是，当我对其进行foreach循环时，array它始终是我放置的大小.. 至少可以说令人沮丧。
那么我做错了什么？我怎样才能让它工作？我对此感到非常沮丧。谢谢
哦，仅供参考，这样我就不能再依赖cryptlib了。我正在尝试重新编译一个不同的项目，该项目使用cryptlib, 作为静态库而不是共享的，这会导致我的编译选项出现一些问题并且太麻烦而无法改回来。
编辑显示更多代码
这是我使用的测试。我找到了一个显示一堆测试的网页，所以这是我实现的。
void VerifyEncrypt16(const BYTE* expected, const BYTE* key, const BYTE* iv, const BYTE* plainText)
{
BYTE actual[16] = {0x00};
Aes128Class aes;
aes.SetKey(key, 16);
aes.SetIV(iv, 16);
size_t len = 0;
aes.EncryptData(actual, len, plainText, 16);
_ASSERT(CompareTwoArrays(expected, actual));
}
void VerifyEncrypt16String(const char* expected, const char* key, const char* iv, const char* plainText)
{
BYTE e[16];
BYTE k[16];
BYTE i[16];
BYTE p[16];
ByteUtil::StringToHex(expected, e);
ByteUtil::StringToHex(key, k);
ByteUtil::StringToHex(iv, i);
ByteUtil::StringToHex(plainText, p);
VerifyEncrypt16(e, k, i, p);
}
void CheckEncrypt16(void)
{
_RPT0(_CRT_WARN, "Checking Encryption of a 16 byte number IV set to 0\n");
//AESVS GFSbox test data for CBC
VerifyEncrypt16String("0336763e966d92595a567cc9ce537f5e","00000000000000000000000000000000","00000000000000000000000000000000","f34481ec3cc627bacd5dc3fb08f273e6");
VerifyEncrypt16String("a9a1631bf4996954ebc093957b234589","00000000000000000000000000000000","00000000000000000000000000000000","9798c4640bad75c7c3227db910174e72");
VerifyEncrypt16String("ff4f8391a6a40ca5b25d23bedd44a597","00000000000000000000000000000000","00000000000000000000000000000000","96ab5c2ff612d9dfaae8c31f30c42168");
VerifyEncrypt16String("dc43be40be0e53712f7e2bf5ca707209","00000000000000000000000000000000","00000000000000000000000000000000","6a118a874519e64e9963798a503f1d35");
VerifyEncrypt16String("92beedab1895a94faa69b632e5cc47ce","00000000000000000000000000000000","00000000000000000000000000000000","cb9fceec81286ca3e989bd979b0cb284");
VerifyEncrypt16String("459264f4798f6a78bacb89c15ed3d601","00000000000000000000000000000000","00000000000000000000000000000000","b26aeb1874e47ca8358ff22378f09144");
VerifyEncrypt16String("08a4e2efec8a8e3312ca7460b9040bbf","00000000000000000000000000000000","00000000000000000000000000000000","58c8e00b2631686d54eab84b91f0aca1");
//AESVS KeySbox test data for CBC
VerifyEncrypt16String("6d251e6944b051e04eaa6fb4dbf78465","10a58869d74be5a374cf867cfb473859","00000000000000000000000000000000","00000000000000000000000000000000");
//A TON OF MORE TESTS! etc etc etc VerifyEncrypt16String("5c005e72c1418c44f569f2ea33ba54f3","00000000000000000000000000000000","00000000000000000000000000000000","fffffffffffffffffffffffffffffffe");
VerifyEncrypt16String("3f5b8cc9ea855a0afa7347d23e8d664e","00000000000000000000000000000000","00000000000000000000000000000000","ffffffffffffffffffffffffffffffff");
}