求个C#客户端、Java服务器都支持 RSA/CBC/PKCS1Padding 加解密的代码，实现互加密互解
网上找的教程，几乎都不考虑分段加密解密，数据大一点点，就不能用（比如，都是抄这个没考虑分段加密的） https://blog.csdn.net/thc1987/article/details/81383365我只找到客户端分段加密的，但是代码有缺陷，只能用ECB，不能CBC，否则报错（不知为何）https://blog.csdn.net/Qin066/article/details/121856447
java的木有找到支持分段加密，并且和上面C#代码能配合的 Bouncy Castle这个库，参考：https://www.bouncycastle.org/csharp/index.html ttyy008 发表于 2023-2-16 14:19
Bouncy Castle这个库，参考：https://www.bouncycastle.org/csharp/index.html
额，我上面那个https://blog.csdn.net/Qin066/article/details/121856447
就是用这个库呀，现在网上资料全都用这个的。但问题不是在用什么库，而是怎么用。我没有找到用这个库，可以用CBC方式的写法，都是ECB的（已被证明不安全，不推荐） 试试吧
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Paddings;
using Org.BouncyCastle.Crypto.Parameters;
using System;
using System.Text;
public class Program
{
static void Main(string[] args)
{
byte[] key = Encoding.UTF8.GetBytes("0123456789abcdef");
byte[] iv = Encoding.UTF8.GetBytes("fedcba9876543210");
string plaintext = "Hello, world!";
byte[] ciphertext = EncryptCBC(Encoding.UTF8.GetBytes(plaintext), key, iv);
string ciphertextString = Convert.ToBase64String(ciphertext);
Console.WriteLine("Ciphertext: " + ciphertextString);
byte[] decrypted = DecryptCBC(ciphertext, key, iv);
string decryptedString = Encoding.UTF8.GetString(decrypted);
Console.WriteLine("Decrypted: " + decryptedString);
}
public static byte[] EncryptCBC(byte[] plaintext, byte[] key, byte[] iv)
{
IBlockCipher cipher = new AesFastEngine();
cipher = new CbcBlockCipher(cipher);
cipher = new PaddedBufferedBlockCipher(cipher);
cipher.Init(true, new ParametersWithIV(new KeyParameter(key), iv));
byte[] output = new byte;
int bytesProcessed = cipher.ProcessBytes(plaintext, 0, plaintext.Length, output, 0);
cipher.DoFinal(output, bytesProcessed);
return output;
}
public static byte[] DecryptCBC(byte[] ciphertext, byte[] key, byte[] iv)
{
IBlockCipher cipher = new AesFastEngine();
cipher = new CbcBlockCipher(cipher);
cipher = new PaddedBufferedBlockCipher(cipher);
cipher.Init(false, new ParametersWithIV(new KeyParameter(key), iv));
byte[] output = new byte;
int bytesProcessed = cipher.ProcessBytes(ciphertext, 0, ciphertext.Length, output, 0);
cipher.DoFinal(output, bytesProcessed);
return output;
}
}
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