aes

This question already has an answer here: Java Bouncy Castle Cryptography - Encrypt with AES 2 answers Here is my implementation of a AES 256 encrypt and decrypt, developed with the native library of JDK 5: public static String encrypt(String key, String toEncrypt) throws Exception { Key skeySpec = generateKeySpec(key); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted = cipher.doFinal(toEncrypt.getBytes()); byte[] encryptedValue = Base64.encodeBase64(encrypted); return new String(encryptedValue); } public static String decrypt(String key,

I have been trying to implement AES CBC decryption in Python. Since the ciphered text is not a multiple of 16bytes, padding was necessary. Without padding, this error surfaced "TypeError: Odd-length string" But I could not find a proper reference for implementing PKCS5 in PyCrypto Python. Are there any commands to implement this? Thanks After looking into Marcus's suggestion I did this. My goal actually is to decrypt a hex message(128bytes) using this code. However, the output is " ?:" which is very small and the unpad command is deleting those bytes. This is the code. from Crypto.Cipher

最近项目使用到了aes的加解密算法，但是在使用过程中出现了诸多问题，比如bc库版本冲突、并发下bc对象占用解密失败，重复new bc库导致加解密速度太慢等。。。最后经过一番分析，现在分享一下彻底解决这些问题的版本； 1、依赖版本（最好使用这个，支持jdk1.5及以上，算是比较新的） <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcprov-jdk15on</artifactId> <version>1.56</version> </dependency> 2、重头戏，加解密工具类； package util; import com.edi.framework.core.utils.StringUtils; import com.edi.framework.core.utils.encrypt.Base64Util; import org.bouncycastle.jce.provider.BouncyCastleProvider; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.io

I want to encrypt a binary file. My goal is that to prevent anyone to read the file who doesn't have the password. Which is the better solution, AES or Blowfish with the same key length? We can assume that the attacker has great resources (softwares, knowledge, money) for cracking the file. Probably AES. Blowfish was the direct predecessor to Twofish. Twofish was Bruce Schneier's entry into the competition that produced AES. It was judged as inferior to an entry named Rijndael, which was what became AES. Interesting aside: at one point in the competition, all the entrants were asked to give

I am working on a data exchange integration with my client and the data they send me is encrypted using their C# encrypt method (below). My app is running PHP 5.3 and I need an equivalent code to decrypt the data they send. I have the PHP code but it'd not decrypt the client data correctly for me. Clearly I am making some mistake in my encryption/decryption methods, IV key or something. Can anyone spot the mistake? Thanks. C# Code (From my client): using System; using System.Security.Cryptography; using System.Text; using System.IO; public class Program { public static void Main() { var text =

I would like to encrypt a string using code similar to the below and be able to decrypt it using a publicly available website such as one of these (but am open to some other site out there as well): http://aesencryption.net/ http://www.nakov.com/blog/2011/12/26/online-aes-encryptor-decryptor-javascript/ Here is the code I'm currently playing around with and trying on these sites, I haven't been able to find the options that will make this work. Any ideas? public class AES { private readonly int _saltSize = 32; public string Encrypt(string plainText, string key) { if (string.IsNullOrEmpty

One of our customers requires us to encrypt a message return from our web service using AES 256 & Public Key Encryption Server Side (web service) is java based. Client side could be java or .Net. I'm not familiar with any of the encryption methodology and could not find any example that will get me started... Can this even be implemented AES 256 & Public Key Encryption ? How does it work (Public Key Encryption) ? Please direct me to an example that will get me started. AES256 is a specific symmetric encryption scheme, which requires the communicating parties to have pre-shared an encryption

I'm using Laravel's encryptString method to encrypt some data on my website. This uses OpenSSL's 256-bit AES-CBC encryption without any serialization. I'm now trying to decrypt that data in Python but I keep getting errors about key length and can't seem to figure out why. Example data to decrypt: eyJpdiI6ImdxY0VcLzFodmpISFV4allSWmJDdEpRPT0iLCJ2YWx1ZSI6IkxXd0ZJaUd2bTUweW5pNm0wUjQwOFM2N1wvWEs5SlYrNB4xNlR7Qkh1U3FvPSIsIm1hYyI6Ijc5ZWM0YTYxYjljZGFiNzgwNjY2NDU1ZmQ5Yjc1ZmJlOGU4NzBkMjQzMzA3MmVhYzE3NzY4ZmU1MWIyMjZlOTQifQ== Example Key to use for decryption (from laravel .env): base64:/AZejP0lh3McL/