aes

在 上一讲 当中我做了个简单的微信文本消息回显应用，当时是以微信明文方式实现的，其实微信推荐的是消息应该加密传输以增加安全性，所以这讲说说微信消息的加解密。 在微信的 帮助页面 上可以下载微信消息加解密的例程，可惜的是没有Delphi语言的示例，网上搜索一番，没有人贡献出写好的Delphi版的微信加解密算法单元，好在有官方示例的C#版的，那就按照C#的改一个吧。 微信消息是以AES算法进行的加密处理，而遗憾的是Delphi并没有内置的AES算法单元，必须找第三方实现的，不过一般第三方实现的算法都因为种种原因并不完善，需要使用者酌情修改，所以在基础算法支持上Delphi确实和.net以及java这类的开发语言比不了。 呵呵，上网找Delphi版AES算法吧。在在这里要感谢 cnpack开发组 ，他们不但推出一流的delphi开发环境增强组件还有开源组件包cnvcl，这个组件包中有SHA1、AES、MD5等多种算法单元，我打开AES算法单元查看，发现封装的很完美，ECB、CBC模式均支持，呵呵，幸福了 。 参考C#示例代码一通修改测试，省略几昼夜苦干的吐槽终于开花结果： 呵呵，这个或者是网上目前唯一的开源的Delphi版的微信加解密算法单元吧，激动！ {*******************************************************************

I have been trying to convert a code for encrypt in java to ruby, but I am not able to do it completely. I getting different values. passphrase = passphrase + STATIC_KEY; byte[] key = passphrase.getBytes("UTF-8"); MessageDigest sha = MessageDigest.getInstance("SHA-1"); key = sha.digest(key); key = Arrays.copyOf(key, 16); SecretKey secretKey = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec initialisationVector = new IvParameterSpec( new byte[16]); cipher.init(Cipher.ENCRYPT_MODE, secretKey, initialisationVector); byte[] encryptedData =

I am working with SagePay Forms and currently converting the VB examples they have to c#. I have made good progress so the encryption part of my project works fine (SagePay can decrypt it). The issue I am having is that when I attempt to decrypt the string, it turns to garbage. If anyone has done this before I would really appreciate some help with my decryption code. I have included the encryption code which works and the first two lines are the setup and call from another method. I haven't added the VB code but if this is required I could add it. Didn't want a huge post if not required.

I have an app that needs to encode some data using AES/CBC/no padding. The app is ported also on android. There the encoding is done like this: byte[] encodedKey = getKey(); SecretKeySpec skeySpec = new SecretKeySpec(encodedKey, "AES"); AlgorithmParameterSpec paramSpec = new IvParameterSpec(initializationVector); Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec, paramSpec); int blockSize = cipher.getBlockSize(); int diffSize = decrypted.length % blockSize; System.out.println("Cipher size: " + blockSize); System.out.println("Current size: " +

After watching a YouTube video on the Diffie-Hellman Key Exchange , I wanted to try an implementation in JavaScript (Atwood's law). I sketched up an cipher on Node.js with the following rules: Step 1: Client and server agree on a shared key: Client & server start with a 512bit prime public key pK Client generates a 512bit prime private key kC and sends powMod(3, kC, pK) Server generates a 512bit prime private key kS and sends powMod(3, kS, pK) Client & Server use powMod(response, privatekey, pK) as the shared key Step 2: Communication Before a client sends data it is encrypted with the shared

I am trying to create an AES encryption method, but for some reason I keep getting java.security.InvalidKeyException: Key length not 128/192/256 bits Here is the code: public static SecretKey getSecretKey(char[] password, byte[] salt) throws NoSuchAlgorithmException, InvalidKeySpecException{ SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEWithMD5AndDES"); // NOTE: last argument is the key length, and it is 256 KeySpec spec = new PBEKeySpec(password, salt, 1024, 256); SecretKey tmp = factory.generateSecret(spec); SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES"); return

I trying implement algorithm AES 128 in Android but it doesn't work, the problem is import javax.xml.bind.DatatypeConverter; DatatypeConverter.parseHexBinary(key) and DatatypeConverter.printBase64Binary(finalData) Does an alternative exist? My method: private static final String ALGORIT = "AES"; public static String encryptHackro(String plaintext, String key) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, IOException, DecoderException { byte[] raw = DatatypeConverter.parseHexBinary(key); SecretKeySpec skeySpec = new

This question already has an answer here: Java 256-bit AES Password-Based Encryption 9 answers I need to know how to create an AES and using it to encrypt and decrypt a file in java. Try using a CipherOutputStream and passing in a FileOutputStream . See http://www.java2s.com/Tutorial/Java/0490__Security/UsingCipherOutputStream.htm for a quick example, just use Cipher.getInstance("AES/CBC/PKCS5Padding") instead. 来源： https://stackoverflow.com/questions/5307499/how-to-encrypt-a-file-in-java-using-aes