aes

I am a newbie to cryptography. My requirement is to decrypt/encrypt the text that is encrypted/decrypted using openssl. The algorithm that we are using is aes-256-cbc in the Openssl. So, I am trying to implement the same functionality in my application. so far after a lot of googling all i was able to do is.. private static string Encryptor(string TextToEncrypt) { //Turn the plaintext into a byte array. byte[] PlainTextBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(TextToEncrypt); //Setup the AES providor for our purposes. AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider()

I have the following Java code which was shared by one of an integration partner for their API encryption import java.nio.ByteBuffer; import java.security.AlgorithmParameters; import java.security.SecureRandom; import java.security.spec.KeySpec; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Base64;

Is it possible that after cbc encryption, null character appears in the resulting multibyte data. If yes, what precaution should I take to avoid it. Is it possible that after cbc encryption, null character appears in the resulting multibyte data. Absolutely. It would not be a pseudo-random function if values like 0's were missing. If yes, what precaution should I take to avoid it. Treat everything as a byte array with embedded NULL s. Never treat it like a char* . If you want to treat it like a char* , then you will need to encode it first. Try hexadecimal, Base32 or Base64. 来源： https:/

I encrypt some data using AES in a server application, which is written in C#. I use a predefined key (32 bytes) and IV (16 bytes), for instance... Key: 81fe1681..6a451c1c IV: e83c..ae76 This is my C# code I use to encrypt the data: async Task<byte[]> Encrypt(string privateKey, string pin, byte[] data) { using (var sha = SHA256.Create()) { byte[] keyHash = sha.ComputeHash(Encoding.UTF8.GetBytes($"{privateKey}")); byte[] pinHash = sha.ComputeHash(Encoding.UTF8.GetBytes($"{pin}")); using (Aes aes = Aes.Create()) { byte[] key = keyHash.Slice(0, aes.Key.Length); byte[] iv = pinHash.Slice(0, aes.IV

iOS9 - NSAppTransportSecurity 配置要求 属性结构 属性详解 事例讲解 只有HTTPS 所有网址都不经过ATS关闭ATS 所有网址都经过ATS添加一些例外白名单 所有网址都不经过ATS添加例外 使用低等级版本的TLS协议 如何配置 iOS9 - NSAppTransportSecurity 原文地址: http://www.pluto-y.com/ios9-nsapptransportsecurity/ App Transport Security（以下均称 ATS ）是iOS9提供的一个新特性，主要是保证app和web服务之间的安全。如果不想开启的话，可以关闭这个特性。 所有用到 NSURLConnection 、 CFURL 以及 NSURLSession API都会触发 ATS (使用iOS9的SDK编译)验证, 所以在iOS9中需要符合一些配置才可以使 ATS 正常运行。 配置要求 关于App Transport Security 的一些进本配置要求： * 服务器只要支持TLS协议1.2 * 加密算法也是有限制，需要在以下列表中 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_ECDSA_WITH_AES_256