3des

I have an app that must send login credentials that have been encrypted first by MD5 and then by 3DES. I have managed to use CryptoSwift to encrypt the string by MD5. However I cannot find anything to encrypt by 3DES on Swift. I have tried CommonCrypto. As far as I can tell this is in C but could be imported into Objective C with a bridging header. I have found a few articles and tutorials that tell me how to import CommonCrypto into Swift, either by a bridging header(with the warning it will not work with frameworks) or by Model.map. However neither are working. Im not sure if this is a

I am using 3DESC to decrypt data but i am getting following exception java.security.InvalidKeyException: Invalid key length: 16 bytes My Code: public static byte[] decrypt3DESCBC(byte[] keyBytes, byte[] ivBytes, byte[] dataBytes) { try { AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes); SecretKeySpec newKey = new SecretKeySpec(keyBytes, "DESede"); Cipher cipher = Cipher.getInstance("DESede/CBC/NoPadding"); cipher.init(Cipher.DECRYPT_MODE, newKey, ivSpec); // Causes Exception return cipher.doFinal(dataBytes); } catch (Exception e) { e.printStackTrace(); } return null; } Printed all

最近在看一个项目的代码 开发语言：C++ 开发环境：VS2005 但有一个很别扭的地方，就是这个项目与外界的加密算法采用DESede，但其实现是采用jni调用java vm里面的函数。 查了一下，可以用Openssl来实现，但要注意model（ECB）和padding（PKCS#5） #资料 PKCS5, PKCS7和SSL3, 以及CMS(Cryptographic Message Syntax) 有如下相同的特点: 1)填充的字节都是一个相同的字节 2)该字节的值,就是要填充的字节的个数 如果要填充8个字节,那么填充的字节的值就是0×8; 要填充7个字节,那么填入的值就是0×7; … 如果只填充１个字节，那么填入的值就是0×1; 这种填充方法也叫PKCS5, 恰好8个字节时还要补8个字节的0×08 正是这种即使恰好是8个字节也需要再补充字节的规定，可以让解密的数据很确定无误的移除多余的字节。 参考资料: [1]Java DESede encrypt, OpenSSL equivalent http://stackoverflow.com/questions/9038298/java-desede-encrypt-openssl-equivalent [2] DES 算法的 C++ 与 JAVA 互相加解密 http://www.cnblogs.com/WonKerr

Am trying to decrypt a key encrypted by Java Triple DES function using PHP mcrypt function but with no luck. Find below the java code import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; public class Encrypt3DES { private byte[] key; private byte[] initializationVector; public Encrypt3DES(){ } public String encryptText(String plainText, String key) throws Exception{ //---- Use specified 3DES key and IV from other source -------------- byte[] plaintext = plainText.getBytes(); byte[] myIV = key.getBytes(); byte[] tdesKeyData = {(byte)0xA2,

I've written a DES implementation as an exercice and am now wondering if and where (triple-)DES is used today. I've read about banking cards using it, but I can't find any reliable source for it. Triple-DES is still in use today but is widely considered a legacy encryption algorithm. DES is inherently insecure, while Triple-DES has much better security characteristics but is still considered problematic. NIST is the government organization that standardizes on cryptographic algorithms. The most current symmetric-key encryption algorithm NIST standard is AES, the Advanced Encryption Standard.

Below Code is Working Fine in c#.NET byte[] key = Encoding.ASCII.GetByte("012345678901234567890123"); //24characters byte[] plainText = Encoding.ASCII.GetBytes("lasaa"); TripleDES des = TripleDES.Create(); des.Key = key; des.Mode = CipherMode.CBC; ICryptoTransform ic = des.CreateEncryptor(); byte[] enc = ic.TransformFinalBlock(plainText, 0, plainText.Length); MessageBox.Show(UTF8Encoding.UTF8.GetString(enc)); My questions regarding above are... How can I specify KeySize? if i use des.KeySize= 128 or 192 or 256 it gives Specified key is not a valid size for this algorithm If I change character