[英].NET TripleDESCryptoServiceProvider equivalent in Java
拜托,請不要問我為什么。 我只是在.NET中使用此代碼來加密/解密數據字符串。 我現在需要在java中制作“完全”相同的功能。 我已經嘗試了幾個DESede crypt的例子,但是它們都沒有給出與.net中這個類相同的結果。
我甚至在ssl后面制作一個.net webserbvice來服務於.net寫的這兩種方法,但是如果不用盡所有可能性就太愚蠢了。
也許你們中的一些在這個領域更有相關性的java人將會在你的頭腦中如何制作它。
謝謝 !!!
public class Encryption
{
private static byte[] sharedkey = {...};
private static byte[] sharedvector = {...};
public static String Decrypt(String val)
{
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
byte[] toDecrypt = Convert.FromBase64String(val);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, tdes.CreateDecryptor( sharedkey, sharedvector ), CryptoStreamMode.Write);
cs.Write(toDecrypt, 0, toDecrypt.Length);
cs.FlushFinalBlock();
return Encoding.UTF8.GetString(ms.ToArray());
}
public static String Encrypt(String val)
{
TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
byte[] toEncrypt = Encoding.UTF8.GetBytes(val);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, tdes.CreateEncryptor( sharedkey, sharedvector ), CryptoStreamMode.Write);
cs.Write(toEncrypt, 0, toEncrypt.Length);
cs.FlushFinalBlock();
return Convert.ToBase64String(ms.ToArray());
}
}
String plain = "userNameHere:passwordHere";
Console.WriteLine("plain: " + plain);
String encrypted = Encrypt(plain);
Console.WriteLine("encrypted: " + encrypted);
// "zQPZgQHpjxR+41Bc6+2Bvqo7+pQAxBBVN+0V1tRXcOc="
String decripted = Decrypt(encrypted);
Console.WriteLine("decripted: " + decripted);
// "userNameHere:passwordHere"
代碼如下,但首先是幾個注釋。
sun.misc.BASE64Encoder
和sun.misc.BASE64Decoder
,使用像BouncyCastle這樣的第三方庫,或者編寫自己的庫。 sharedkey
以反映這一點,因為Java DESede密碼總是需要192位密鑰; 由鍵生成器來處理鍵控選項。 sharedvector
的前64位。 該類應與C#版本互操作。
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
public class Encryption
{
private static byte[] sharedkey = {
0x01, 0x02, 0x03, 0x05, 0x07, 0x0B, 0x0D, 0x11,
0x12, 0x11, 0x0D, 0x0B, 0x07, 0x02, 0x04, 0x08,
0x01, 0x02, 0x03, 0x05, 0x07, 0x0B, 0x0D, 0x11
};
private static byte[] sharedvector = {
0x01, 0x02, 0x03, 0x05, 0x07, 0x0B, 0x0D, 0x11
};
public static void main(String... argv)
throws Exception
{
String plaintext = "userNameHere:passwordHere";
String ciphertext = encrypt(plaintext);
System.out.println(ciphertext);
System.out.println(decrypt(ciphertext));
}
public static String encrypt(String plaintext)
throws Exception
{
Cipher c = Cipher.getInstance("DESede/CBC/PKCS5Padding");
c.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(sharedkey, "DESede"), new IvParameterSpec(sharedvector));
byte[] encrypted = c.doFinal(plaintext.getBytes("UTF-8"));
return Base64.encode(encrypted);
}
public static String decrypt(String ciphertext)
throws Exception
{
Cipher c = Cipher.getInstance("DESede/CBC/PKCS5Padding");
c.init(Cipher.DECRYPT_MODE, new SecretKeySpec(sharedkey, "DESede"), new IvParameterSpec(sharedvector));
byte[] decrypted = c.doFinal(Base64.decode(ciphertext));
return new String(decrypted, "UTF-8");
}
}
輸出:
zQPZgQHpjxR + 41Bc6 + 2Bvqo7 + pQAxBBVN + 0V1tRXcOc =
userNameHere:passwordHere
你有一些問題,
一旦進行了這些更改,您應該能夠在Java端解密它。
您是否確定.NET代碼使用與Java代碼相同的填充? 我看到.NET代碼中沒有指定填充,這就是我問的原因。
您是否碰巧擁有Java代碼的源代碼,它將幫助您找到錯誤。
請嘗試以下方法。 對於實際使用,我會得到一個像commons編解碼器一樣的base64庫,或者使用BouncyCastle附帶的編解碼器
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
public class Encryption {
private static SecretKey sharedkey;
private static byte [] sharedvector;
static {
int keySize = 168;
int ivSize = 8;
try {
KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede");
keyGenerator.init(keySize);
sharedkey = keyGenerator.generateKey();
sharedvector = new byte [ivSize];
byte [] data = sharedkey.getEncoded();
int half = ivSize / 2;
System.arraycopy(data, data.length-half, sharedvector, 0, half);
System.arraycopy(sharedvector, 0, sharedvector, half, half);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
public static void main(String [] args) throws Exception {
System.out.println(Decrypt(Encrypt("Hello World")));
}
public static String Encrypt(String val) throws GeneralSecurityException {
Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, sharedkey, new IvParameterSpec(sharedvector));
return new sun.misc.BASE64Encoder().encode(cipher.doFinal(val.getBytes()));
}
public static String Decrypt(String val) throws GeneralSecurityException, IOException {
Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, sharedkey, new IvParameterSpec(sharedvector));
return new String(cipher.doFinal(new sun.misc.BASE64Decoder().decodeBuffer(val)));
}
}
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