使用黑莓AES / CBC / PKCS5Padding解密数据 [英] decrypting data with AES/CBC/PKCS5Padding using blackberry

问题描述

我在AES中使用AES / CBC / PKCS5Padding加密实例进行AES加密和解密
我如何使用java中以上加密的黑莓解密数据。

使用黑莓解密AES / CBC / PKCS5Padding数据

感谢
Bapi

解决方案

我建议使用BlackBerry API（Bouncy Castle会工作，但是为什么会使事情变得复杂）？

使用net.rim.crypto包 - 您正在使用所有对称加密，因此您只需要标准的 RIM签名密钥在一个设备上运行（$ 20和2-3天） - 同时你可以用模拟器做所有事情。

基本上你将要创建一个PKCS5UnformatterEngine它包装一个封装AESDecryptorEngine的CBCDecryptorEngine。可能将一切封装在BlockDecryptor中，以便您可以像InputStream一样处理。有些东西（和已经有一段时间，因为我这样做，所以它可能无法100％写作）：

  AESKey key = new AESKey（<你的密钥数据作为一个字节[]>）
 InitializationVector iv = new InitializationVector（<你的iv数据作为一个字节[]>）//当然你需要知道你的IV，因为你正在做CBC加密
 
 BlockDecryptor decryptor = new BlockDecryptor（
 new PKCS5UnformatterEngine（
 new CBCDecryptorEngine（
 new AESDecryptorEngine（key），
 iv 
）
）
）; 
 
 // then解密器充当InputStream，它为您提供解密的解包数据
 
 decryptor.read（buffer）; //缓冲区将包含解密的，未打包的数据
  

I am using AES/CBC/PKCS5Padding cipher instance for AES encryption and decryption in java How can I decrypt the data using blackberry encrypted by above in java.

decrypting data with AES/CBC/PKCS5Padding using blackberry

Thanks Bapi

解决方案

I recommend using the BlackBerry API (Bouncy Castle will work, but why complicate things?).

Use the net.rim.crypto package - you're using all symmetric encryption so you'll only need the standard RIM signing keys to run on a device ($20 and 2-3 days to get) - in the meantime you can do everything with the simulator.

Basically you'll want to create a PKCS5UnformatterEngine which wraps a CBCDecryptorEngine which wraps an AESDecryptorEngine. Probably wrap everything in a BlockDecryptor so you can treat is as in InputStream. Something like (and it's been a little while since I've done this, so it may not work 100% as written):

InputStream encryptedInput;  // if you have a byte[] of data, use a ByteArrayInputStream
AESKey key = new AESKey(<your key data as a byte[]>) 
InitializationVector iv = new InitializationVector(<your iv data as a byte[]>) // of course you need to know your IV since you're doing CBC encryption

BlockDecryptor decryptor = new BlockDecryptor(
   new PKCS5UnformatterEngine(
      new CBCDecryptorEngine(
         new AESDecryptorEngine(key),
         iv
      )
   )
);

// then decryptor acts as an InputStream which gives you your decrypted, unpacked data

decryptor.read(buffer); // buffer will contain decrypted, unpacked data

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