aes | 易学教程

Want to use AES 256 CBC with 32 bytes but it shows java.security.InvalidAlgorithmParameterException

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问题 I am using AES 256 CBC. I have 32 bytes of IV. But when i run this it shows an exception as: Exception in thread "main" java.lang.RuntimeException: java.security.InvalidAlgorithmParameterException: Wrong IV length: must be 16 bytes long at com.abc.aes265cbc.AESUtil.decrypt(AESUtil.java:50) at com.abc.aes265cbc.Security.main(Security.java:48) Caused by: java.security.InvalidAlgorithmParameterException: Wrong IV length: must be 16 bytes long at com.sun.crypto.provider.CipherCore.init(CipherCore

Decrypt .Net cookie in nodejs

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问题 I've created an encrypted cookie in .Net and I'm trying to decrypt it's content in nodejs. But nodejs keeps throwing the exception "TypeError: DecipherFinal fail" In .Net I'm using the AES encryption method with the key 932D86BB1448EEAA423F38495A2290746D81C27E55D1DC264279537006D6F4CC. My web.config file has the following row <machineKey validationKey="A5326FFC9D3B74527AECE124D0B7BE5D85D58AFB12AAB3D76319B27EE57608A5A7BCAB5E34C7F1305ECE5AC78DB1FFEC0A9435C316884AB4C83D2008B533CFD9" decryptionKey

Storing AES Secret key using keystore in java

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问题 I am using Java keystore to store the secret key for AES encryption. final String strToEncrypt = "Hello World"; KeyGenerator kg = KeyGenerator.getInstance("AES"); kg.init(128); SecretKey sk = kg.generateKey(); String secretKey = String.valueOf(Hex.encodeHex(sk.getEncoded())); //Storing AES Secret key in keystore KeyStore ks = KeyStore.getInstance("JCEKS"); char[] password = "keystorepassword".toCharArray(); java.io.FileInputStream fis = null; try { fis = new java.io.FileInputStream(

AES对称加密和解密

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/* * AES对称加密和解密 */ public class SymmetricEncoder { /* * 加密 * 1.构造密钥生成器 * 2.根据ecnodeRules规则初始化密钥生成器 * 3.产生密钥 * 4.创建和初始化密码器 * 5.内容加密 * 6.返回字符串 */ public static String AESEncode ( String encodeRules , String content ) { try { //1.构造密钥生成器，指定为AES算法,不区分大小写 KeyGenerator keygen = KeyGenerator . getInstance ( "AES" ) ; //2.根据ecnodeRules规则初始化密钥生成器 //新增下面两行，处理Linux操作系统下随机数生成不一致的问题 SecureRandom secureRandom = SecureRandom . getInstance ( "SHA1PRNG" ) ; secureRandom . setSeed ( encodeRules . getBytes ( ) ) ; //生成一个128位的随机源,根据传入的字节数组 //keygen.init(128, new SecureRandom(encodeRules.getBytes())); //将原来的初始化方式

Different output encryption both CryptoJS and Java Code

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问题 I need to encrypt certainly string from client-side (JavaScript) and decrypt from server-side (Java), so I found CryptoJS and I write the code with the same params/configuration of mi Java Code but the output is always different, do you have any idea or what happen? I'm using CBC with NoPadding CryptoJS http://jsfiddle.net/Soldier/gCHAG/ <script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/aes.js"> </script> <script src="http://crypto-js.googlecode.com/svn/tags/3.1.2

Android AES decryption and data from iOS:javax.crypto.BadPaddingException: pad block corrupted

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问题 I tried to decrypt a backup on Android which is sent from iOS , and the exception javax.crypto.BadPaddingException: pad block corrupted is showed at method doFinal. public String decrypt(byte[] cipherText, SecretKey key, byte [] initialVector) throws Exception { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding"); IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector); cipher.init(Cipher.DECRYPT_MODE, key, ivParameterSpec); cipherText = cipher.doFinal(cipherText); return

How do I keep a mySQL database secure?

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问题 I'm going to be implementing a PHP/mySQL setup to store credit card information. It seems like AES_ENCRYPT/AES_DECRYPT is the way to go, but I'm still confused on one point: How do I keep the encryption key secure? Hardwiring it into my PHP scripts (which will live on the same server as the db) seems like a major security hole. What's the "best practice" solution here? 回答1: You should think long and hard about whether you REALLY need to keep the CC#. If you don't have a great reason, DON'T!

Encrypt/Decrypt string between Java and PHP

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问题 I'm using AES encryption to encrypt and decrypt string between php on the server side and Android app (as client). The encrypted string in PHP is: HaxRKnMxT24kCJWUXaVvqDHahzurJQK+sYA4lIHql/U= and in Java it's: HaxRKnMxT24kCJWUXaVvqD/KMEkJTPTXEcCsHIYGX9TGtCNOHQcJyUURPk8qlgf3 I'm making use of phpseclib in the PHP script to do the encryption. What am I missing here? The relevant Java code here SecretKeySpec skeySpec = new SecretKeySpec(pad16(pass), "AES"); Cipher c = Cipher.getInstance("AES");

AES KeyPairGenerator Not Recognised

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问题 I have an issue with my java code. I'm trying to encrypt a file. However, when I run my java code I get "java.security.InvalidKeyException: Invalid AES key length: 162 bytes". Here is the code: byte[] rawFile; File f = new File("./src/wonkybox.stl"); FileInputStream fileReader = new FileInputStream(f); rawFile = new byte[(int)f.length()]; fileReader.read(rawFile); /***** Encrypt the file (CAN DO THIS ONCE!) ***********/ //Generate the public/private keys KeyPairGenerator keyGen =

AES 256bit encryption with Bouncy Castle: Unlimited Strength Policy still required?

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问题 I want to use AES 256bit encryption with Bouncy Castle and I'm wondering if the "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files" are still required despite BC because I'm receiving a java.security.InvalidKeyException: Illegal key size exception for the following code: public class AES256 { public static void main(String[] args) throws Exception { Security.addProvider(new BouncyCastleProvider()); final KeyGenerator keyGen = KeyGenerator.getInstance("AES");