我们有一个Java库,该库将使用带有密码的AES进行加密和解密,我们需要将其移植到.NET。
这是我的Java代码-
import java.util.*;
import java.lang.*;
import java.io.File;
import java.io.FileInputStream;
import java.math.BigInteger;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
class Rextester
{
public static void main(String args[])
{
byte[] encrypted = EncryptonToBytes("Hello");
System.out.println("Encrypted: " + encrypted); // Result --> Encrypted: [B@1c53fd30
String decrypted = DecryptionFromBytes(encrypted);
System.out.println("Decrypted: " + decrypted);
}
public static final byte[] EncryptonToBytes(String str)
{
byte[] result = null;
//Create SecretKey object from common secret key string mentioned in constants class
byte[] encoded = new BigInteger("728faf34b64cd55c8d1d500268026ffb", 16).toByteArray();
SecretKey secretKey = new SecretKeySpec(encoded, "AES");
Cipher cipher;
try {
//Cipher class object using AES as transformation
cipher = Cipher.getInstance("AES");
//Initialize cipher in encrypt mode along with secret key object created above.
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
//Encrypt input string
result = cipher.doFinal(str.getBytes());
} catch (Exception e) {
e.printStackTrace();
}
//Return null in case of any error
return result;
}
public static String DecryptionFromBytes(byte[] base64Data)
{
try {
//Create SecretKey object from common secret key string mentioned in constants class
byte[] encoded = new BigInteger("728faf34b64cd55c8d1d500268026ffb", 16).toByteArray();
SecretKey secretKey = new SecretKeySpec(encoded, "AES");
//Cipher class object using AES as transformation
Cipher cipher = Cipher.getInstance("AES");
//Initialize cipher in decrypt mode along with secret key object created above.
cipher.init(Cipher.DECRYPT_MODE, secretKey);
//Decrypt input byte array
byte[] decryptedByte = cipher.doFinal(base64Data);
//return decrypted input bytes as string
return (new String(decryptedByte));
} catch (Exception e) {
e.printStackTrace();
}
//return empty string if any error
return "";
}
}
我关注了以下一些文章-
但是他们都没有给我想要的输出。我正在寻找的是-我的java和.net函数都应该给我相同的结果。 从上周开始,我一直在努力完成它,这让我非常沮丧。您的帮助将不胜感激。
答案 0 :(得分:0)
两种方法:
public static byte[] EncryptionToBytes(string str)
{
using (var aes = new AesManaged())
{
aes.Key = new byte[] { 0x72, 0x8f, 0xaf, 0x34, 0xb6, 0x4c, 0xd5, 0x5c, 0x8d, 0x1d, 0x50, 0x02, 0x68, 0x02, 0x6f, 0xfb };
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
byte[] data = Encoding.UTF8.GetBytes(str);
cs.Write(data, 0, data.Length);
}
byte[] encrypted = ms.ToArray();
return encrypted;
}
}
}
public static string DecryptionFromBytes(byte[] encrypted)
{
using (var aes = new AesManaged())
{
aes.Key = new byte[] { 0x72, 0x8f, 0xaf, 0x34, 0xb6, 0x4c, 0xd5, 0x5c, 0x8d, 0x1d, 0x50, 0x02, 0x68, 0x02, 0x6f, 0xfb };
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.PKCS7;
using (var ms2 = new MemoryStream())
{
using (var ms = new MemoryStream(encrypted))
using (var cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Read))
{
cs.CopyTo(ms2);
}
byte[] decrypted = ms2.ToArray();
return Encoding.UTF8.GetString(decrypted);
}
}
}
请注意
System.out.println("Encrypted: " + encrypted);
Java似乎使用了ECB模式的AES(没有查找文档),填充了PKCS7(this证实了我的看法)
请注意,String.getBytes()
使用“默认”编码进行编码,这在不同计算机上可能会有所不同。最好使用getBytes("UTF-8")
和new String(bytes, "UTF-8")
(请参阅https://stackoverflow.com/a/5729823/613130)。在我编写的代码中,我使用了UTF8。您可以使用Encoding.Default
模拟Java代码。