aes

Rijndael padding or length is invalid

由 折月煮酒 提交于 2019-12-13 01:37:51
问题 I am trying to encrypt/decrypt a string using eith Rijndael or Aes and the code below. public class Crypto { private const string defaultVector = "asdfg123456789"; private const CipherMode cipherMode = CipherMode.CBC; //Have tried PaddingMode.ISO10126, PaddingMode.None, and PaddingMode.PKCS7 private const PaddingMode paddingMode = PaddingMode.ISO10126; private const int iterations = 2; private static Rijndael GetCrypto(string passphrase) { var crypt = Rijndael.Create(); crypt.Mode =

Encoding and decoding for every platform

由 雨燕双飞 提交于 2019-12-13 01:27:58
问题 Encode the string in java then decode on all mobile platform. if i use Base64/AES but they all have different implementation on their platform so How can i encode the string then it will decode on every mobile platform(Android,IOS,Windows,Mozilla,BlackBerry,J2ME phones) 回答1: As stated in the comments, base64 and AES are sufficiently standardised that every platform will have a compatible implementation. You just have to ensure a few things: Always use the same character encoding when

c# BouncyCastle Exception: pad block corrupted

由 与世无争的帅哥 提交于 2019-12-13 01:25:07
问题 I've been using the code that was posted here to encrypt and decrypt, written by @nerdybeardo. However, I'm getting the error "pad block corrupted" when trying to decrypt. The Encryptor class looks like this, which implements encrypt then MAC: /// <summary> /// Encrypt/decrypt + HMAC using BouncyCastle (C# Java port) /// </summary> /// <typeparam name="TBlockCipher">The type of the block cipher.</typeparam> /// <typeparam name="TDigest">The type of the digest.</typeparam> /// <see cref="https

AES string encryption/decryption characters are spaced out

由 妖精的绣舞 提交于 2019-12-13 01:23:47
问题 I'm encrypting and then decrypting a string using AES. But my output looks like this: Original text >> HI WORLD Decrypted text >> H I W O R L D I have tried a lot of code but I have not found the problem. Where is the problem here? class Program { public static void Main(string[] args) { byte[] aesKey = Cryptography.GenerateAes128Key(); Console.WriteLine("AES key >> " + aesKey.Length); string originalText = "HI WORLD"; byte[] myMess = ASCIIEncoding.Unicode.GetBytes(originalText); Console

AES 256 CBC encryption in Laravel and Decryption in android

由 空扰寡人 提交于 2019-12-13 00:13:26
问题 So my problem is this: i have a password that i'm encrypting in Laravel 5.6 with AES-256-CBC and send it to an android device, problem is i can't find a way to decrypt it knowing that i found a way to extract the IV and the encrypted value and the key is available on the android device ! I'm successfully decrypting the value if i use AES-128-CBC using this code on the android device, but failing the AES-256-CBC cypher and i don't understand where the problem is ! The code : public static

C# and PHP have different AES encryption results

由 梦想与她 提交于 2019-12-12 22:28:35
问题 I have same data and encryption key, same algorithm, same mode but different result. C# Code: string encKey = "0F777D55FDB154E7D8754C3C0E660A65"; string dataToEncrypt = "FF01083131323233333434FF020102FF030E3230313630313230313635353032FF040C313132323333343435353636FF05083131323233333434FF060F6D6173746572706173735F75736572FF070101FF080104800000000000000000000000"; using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { using (System.Security.Cryptography.AesManaged AES = new System

PHP - Openssl_decrypt error : wrong final block length (AES 256 CBC mode encryption/decryption)

由 荒凉一梦 提交于 2019-12-12 21:16:24
问题 This is my code : function decrypt($code) { $key = '3552ef55ecdf04324..'; // 64 bytes length $iv = 'd20818af907b59c3b15d258dd3969770'; // 32 bytes length $key = hash("sha256", $key,true); // 32 bytes length $iv = md5($iv,true); // 16 bytes length echo strlen(base64_decode($code)); // 80 bytes //return openssl_decrypt(base64_decode($code), 'aes-256-cbc', $key, 0 ,$iv); // return false $output = openssl_decrypt(base64_decode($code), 'aes-256-cbc', $key, 0 ,$iv); return openssl_error_string(); }

AES加密原理和AOE工程实践

由 霸气de小男生 提交于 2019-12-12 19:32:29
在AI业务的开发的过程中，我们常常需要对模型文件进行加密。 我们从以下几个方面来说一说AES的加密原理以及AOE里的工程实践。 常见的加密算法 AOE对模型加密需求的思考 AES的加密原理 AOE工程实践-AES和AOE的结合 常见的加密算法 常见的加密算法，主要分为两种： 对称加密 ，采用单密钥的加密方法，同一个密钥可以同时用来加密和解密。常用的对称加密算法有DES，3DES，AES等。 非对称加密 ，需要两个密钥来进行加密和解密，这两个密钥是公开密钥（public key，简称公钥）和私有密钥（private key，简称私钥）。常用的非对称加密算法有RSA，Elgamal，ECC等。 用个比喻来理解一下这2种不同的加密方式： 对称加密：假设有一个密码箱，A设置了一个密码锁好箱子，B知道这个密码以后，输入这个密码就可以打开箱子，这个密码就是秘钥，A和B使用相同的密码。 非对称加密：有一把锁和一把唯一的钥匙，A用锁把箱子锁好，B只有用这把钥匙才能打开这个箱子。这把锁就可以理解为公钥，是公开的。这把钥匙可以理解为私钥，是不公开的，是不在网络里传输的，只有私钥的拥有者才能打开这个箱子。 简单比较一下他们的差异： 功能特性 对称加密 非对称加密 密钥特征 加密方和解密方使用同一个密钥 加密方和解密方使用不同的密钥 加密效率 效率高，速度快 速度慢 密钥安全性 传输过程中容易泄漏

How Do You Ensure Data Security of Small Data?

由 会有一股神秘感。 提交于 2019-12-12 18:25:27
问题 My Question: What is the Best Approach to Ensure Data Security of Small Data? Below I present a concern around symmetric and asymmetric encryption. I'm curious if there is a way to do asymmetric encryption on small data with an equivalent of some sort of "salting" to actually make it secure? If so, how do you pick a "salt" and implement it properly? Or is there a better way to handle this? Explanation of My Concern: When encrypting something that has "bulk" it seems to me that asymmetric

Data encryption in application cluster

由 佐手、 提交于 2019-12-12 14:33:31
问题 I have a web application accessed over SSL. To beef up security on the back end we are looking at adding in symmetric encryption for the database. The application is spread across 6 servers in a websphere cluster. We were looking at a simple model of generating a common key, propagating the key across all clones in an isolated JCEKS keystore. Settled on AES (256) for the cipher and key length. Question I have is how safe is this approach? My fear is we create all of this and encrypt the data,
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