在 AS3Crypto 和 AS3Crypto 之间加密/解密 ECB/PKS5/Blowfish Javax.Crypto 因填充错误而失败

发布于 2024-07-20 14:45:39 字数 1026 浏览 6 评论 0原文

我有一个密钥作为文件发送给我，这样我就可以使用 Blowfish 加密一些 xml 数据。如何访问密钥以便将其与 AS3Crypto 一起使用？我假设我需要使用 [Embed] 元标记来嵌入它。它是 mimeType="application/octet-stream" 但我不确定这是否正确。如何嵌入该文件，然后引用该文件作为密钥？我正在加密的 xml 无法在 Java 端解密。每次尝试都会失败，并出现以下异常：

javax.crypto.BadPaddingException：给定的最终块未正确填充。

作为奖励，如果有人有使用该库来处理 Java 实现的经验，并且知道要使用的理想模式/填充/IV，那就太棒了。谢谢！

//keyFile is an embedded asset. I was given a file to use as the key
var kdata:ByteArray = new keyFile() as ByteArray;

//Convert orderXML to Base64
var orderData:ByteArray = Base64.decodeToByteArray(String(orderXML));

//Cipher name   
var cname:String = "simple-blowfish-ecb";

var pad:IPad = new PKCS5;
var mode:ICipher = Crypto.getCipher(cname, kdata, pad);

//not sure if this is necessary. seems to be also set in mode
pad.setBlockSize(mode.getBlockSize());

mode.encrypt(orderData);

var transmitXML:String = Base64.encodeByteArray(orderData);

//DEBUG: Output to TextArea
storePanel.statusBox.text += "\n--TRANSMIT--\n"+transmitXML;

原文

I have a secret key that was sent to me as a file so I can encrypt some xml data using Blowfish. How do I access the key so that I can use it with AS3Crypto? I assume I need to Embed it using the [Embed] meta tag. It's mimeType="application/octet-stream" but I'm not sure if thats right. How do I embed, then reference this file as the secret key? The xmls that I'm encrypting cannot be decrypted on the Java side. Each attempt fails with this exception:

javax.crypto.BadPaddingException: Given final block not properly padded.

As a bonus, if anyone has experience using the lib to work with the Java implementation and knows the ideal mode/padding/IV to use that would be awesome. Thanks!

//keyFile is an embedded asset. I was given a file to use as the key
var kdata:ByteArray = new keyFile() as ByteArray;

//Convert orderXML to Base64
var orderData:ByteArray = Base64.decodeToByteArray(String(orderXML));

//Cipher name   
var cname:String = "simple-blowfish-ecb";

var pad:IPad = new PKCS5;
var mode:ICipher = Crypto.getCipher(cname, kdata, pad);

//not sure if this is necessary. seems to be also set in mode
pad.setBlockSize(mode.getBlockSize());

mode.encrypt(orderData);

var transmitXML:String = Base64.encodeByteArray(orderData);

//DEBUG: Output to TextArea
storePanel.statusBox.text += "\n--TRANSMIT--\n"+transmitXML;

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策马西风 2024-07-27 14:45:39

不知道您是否仍然不确定如何嵌入二进制数据，但使用 [Embed] 标记是正确的（这当然是一种好方法）。

我经常这样嵌入：

[Embed(source="myKeyFile.key", mimeType="application/octet-stream")]
private const _KeyFile:Class;
private var keyFile:ByteArray = new _KeyFile();

...

trace(keyFile.length + " bytes"); // XYZ bytes

Dunno if you're still unsure about how to embed binary data, but you're right about using the [Embed] tag (it's certainly one good way of doing it).

I often embed like this:

[Embed(source="myKeyFile.key", mimeType="application/octet-stream")]
private const _KeyFile:Class;
private var keyFile:ByteArray = new _KeyFile();

...

trace(keyFile.length + " bytes"); // XYZ bytes

More info:
http://dispatchevent.org/roger/embed-almost-anything-in-your-swf/

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