aes | 易学教程

PHP encryption code converted to ColdFusion

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问题 I have this bit of PHP that I'd like to do the equivalent of in ColdFusion. function & _encryptMessage( $message ) { $td = mcrypt_module_open( MCRYPT_RIJNDAEL_256, '', MCRYPT_MODE_CBC, ''); mcrypt_generic_init( $td, $this->key, $this->iv ); $encrypted_data = mcrypt_generic( $td, $message ); mcrypt_generic_deinit($td); mcrypt_module_close($td); return base64_encode( $encrypted_data ); } I think it is just encrypt(message,"","AES","Base64") But I have no real way of knowing for sure and it

AES encryption Java to c#

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问题 I have the following code which encrypts/decrypts data for me in java I need to encrypt/decrypt data in C# on a windows phone(8) device and same data should be able to decrypt/encrypt using this java code. what would be the equivalent code of this java code in C# in Windows Phone?? public class AESencrp { private static final String ALGO = "AES"; private static final byte[] keyValue = new byte[] { 'S', 'D', 'P', 'i', 'b', 'm', 'B','H', 'A', 'R', 'T','I', 'P', 'K', 'e', 'y' }; public static

AES CBC加解密

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项目中用到AES-128-CBC加密模式，服务端客户端采用不同语言开发，记录不同语言AES的实现。 AES加密数据块分组长度必须为128比特，密钥长度可以是128比特、192比特、256比特中的任意一个（如果数据块及密钥长度不足时，会补齐，补齐的是size）。 1. NodeJS var crypto = require('crypto') // AES 加密 function encryptstring(str) { var cipher = crypto.createCipheriv('aes-128-cbc', '1234567812345678', '1234567812345678'), encrypted = cipher.update(str, 'utf-8', 'base64'); encrypted += cipher.final('base64'); return encrypted; } console.log(encryptstring("hello world")) $ node aes.js a2SpM37nvVYtBnVHonX86w== 2. Golang package main import ( "bytes" "crypto/aes" "crypto/cipher" "encoding/base64" "fmt" ) const ( KEY =

Given Final Block not properly padded while AES decryption

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问题 First, I'll tell what is my primary goal. I'm going to use AES to encrypt some content in the client side, then use RSA public key to encrypt the important AES specs and sending both AES encrypted data and RSA encrypted AES specs to server. So at server, I'll decrypt the AES key specs using RSA private key, then using those AES specs, I'll decrypt the AES encrypted data. I've successfully made the RSA part working by test encrypting and decrypting. I've to made this AES art working before

android AES encryption/ decryption

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问题 I have managed to code the function for doing file encryption / decryption . But its very slow especially as the file size increase. for eg audio / vidoe file which are few MB long I have gone through almost all post to improve it, and tried changing the algorthms. Please help me if there is any change that can help me improve performance. public class DataEncryptDecrypt { public Cipher encryptcipher, decryptCipher; int blockSize = 16; String TAG = "DataEncryptDecrypt"; private static final

AesManaged Decryption in Metro WinRT application

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问题 I have some text, encrypted by C#'s AesManaged, which must be decrypted in a WinRT Metro application. I cannot change the Encryption code, as the code has other dependencies which cant be changed. The encryption function looks like this: // Note: Edited out possibly real password and salt: Guid password = Guid.Parse("AAAAAAAAA-AAAA-AAAA-AAAA-AAAAAAAAAAAA"); Guid salt = Guid.Parse("AAAAAAAAA-BBBB-BBBB-BBBB-AAAAAAAAAAAA"); string EncryptedValue(string data) { byte[] passwordBytes = password

How come putting the GCM authentication tag at the end of a cipher stream require internal buffering during decryption?

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问题 In Java, the "default" AES/GCM provider SunJCE will - during the decryption process - internally buffer 1) encrypted bytes used as input or 2) decrypted bytes produced as result . Application code doing decryption will notice that Cipher.update(byte[]) return an empty byte array and Cipher.update(ByteBuffer, ByteBuffer) return written length 0. Then when the process completes, Cipher.doFinal() will return all decoded bytes. First question is: Which bytes is it that are being buffered, number

Cryptography: best practices for keys in memory?

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问题 Background: I got some data encrypted with AES (ie symmetric crypto) in a database. A server side application, running on a (assumed) secure and isolated Linux box, uses this data. It reads the encrypted data from the DB, and writes back encrypted data, only dealing with the unencrypted data in memory. So, in order to do this, the app is required to have the key stored in memory. The question is, is there any good best practices for this? Securing the key in memory. A few ideas: Keeping it in

aes 加密解析问题

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背景：出于安全考虑，管理平台在数据传送的途中用到aes 加密出现部分用户登录系统时报 500 错误查看后台日志，发现加解密这块报错分析：猜测是用户自定义密码在加解密解析的时候出现问题 aes 加密数据首先经过了protobuf进行格式，数据传输到后台无法解析所以：二进制数据直接进行AES加密后大多无法正常解析，于是在加密前有用Base64转化了一下前后台统一：KEY，IV向量，数据填充方式如PKCS5或者PKCS7这样的填充 base64转化细节 base64转化后的结果带有‘\n’,所以加密的时候要将\n去掉，否则加密后的密文和在线加密也不同验证： https://www.cnblogs.com/edan/p/10252250.html aes 加密细节 https://www.cnblogs.com/happyhippy/archive/2006/12/23/601353.html aes加密密钥向量 aes 加密 spring-boot-configuration-processor 获取配置文件插件 https://blog.csdn.net/fzbbw/article/details/101175595 <dependency> <groupId>org.springframework.boot</groupId> <artifactId

C# Example of AES256 encryption using System.Security.Cryptography.Aes

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问题 I need to implement AES 256 encryption /decryption and I haven't been able to find an example that works correctly. MSDN suggests that I should use the AES class. The Rijndael class is the predecessor of the Aes algorithm. You should use the Aes algorithm instead of Rijndael. For more information, see the entry The Differences Between Rijndael and AES in the .NET Security blog. Could anyone point me in the direction of a good example using the AES class for AES256? To add a little more