Java中重复的Oracle DES加密 [英] Duplicate Oracle DES encrypting in Java

问题描述

我最近问了一个关于Oracle加密的问题。为了找到自己的解决方案，我决定将加密（好的，混淆）移到应用程序的某些任务。

我的问题是数据库已经以某种方式加密数据，我需要Java代码来复制该功能，以便一个系统加密的文本可以被其他的，反之亦然。

我希望加密与数据库已经在做的事情兼容，但找不到描述Oracle正在做什么的文档。如何在Java中复制？

  dbms_obfuscation_toolkit.DESEncrypt（
 input_string => v_string，
 key_string => key_string，
 encrypted_string => encrypted_string）; 
返回UTL_RAW.CAST_TO_RAW（encrypted_string）; 
  

无论我尝试什么，似乎Java DES加密与Oracle不同。 p>

解决方案

我发现这样做：

  KeySpec ks = new DESKeySpec（new byte [] {'s'，'e'，'c'，'r'，'e'，'t'，'！'，'！'}） 
 SecretKeyFactory skf = SecretKeyFactory.getInstance（DES）; 
 SecretKey sk = skf.generateSecret（ks）; 
密码c = Cipher.getInstance（DES / CBC / NoPadding）; 
 IvParameterSpec ips = new IvParameterSpec（new byte [] {0,0,0,0,0,0,0,0}）; 
 c.init（Cipher.ENCRYPT，sk，ips）; 
 //或
 c.init（Cipher.DECRYPT，sk，ips）; 
  

缺少的部分是Initialization Vector（ips），它必须为8位。当您在Java中使用null时，您会得到不同的东西。

I recently asked a question about Oracle Encryption. Along the way to finding a solution for myself I decided to move the encryption (well, obfuscation) to the application side for certain tasks.

My problem is that the database is already encrypting data a certain way and I need Java code to duplicate that functionality, so that text encrypted by one system can be decrypted by the other and vice versa.

I want the encryption to be compatible with what the DB was already doing but couldn't find the documentation that describes exactly what Oracle is doing. How do I replicate this in Java?

dbms_obfuscation_toolkit.DESEncrypt(
  input_string => v_string,
  key_string => key_string,
  encrypted_string => encrypted_string );
RETURN UTL_RAW.CAST_TO_RAW(encrypted_string);

No matter what I try, it seems as if the Java DES encryption is different than Oracle's.

解决方案

I found this works:

KeySpec ks = new DESKeySpec(new byte[] {'s','e','c','r','e','t','!','!'});
SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
SecretKey sk = skf.generateSecret(ks);
Cipher c = Cipher.getInstance("DES/CBC/NoPadding");
IvParameterSpec ips = new IvParameterSpec(new byte[] {0,0,0,0,0,0,0,0});
c.init(Cipher.ENCRYPT, sk, ips);
// or
c.init(Cipher.DECRYPT, sk, ips);

The missing piece was the Initialization Vector (ips) which must be 8 zeros. When you use null in Java you get something different.

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