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I wrote the following code in Android (v2.2 API 8), where a plain text is entered and the code encrypts it using a user password and a random salt and then decrypts it. After running the code I only get part of the plain text correct. For example the user enters "Msg 1.5 to encrypt" and the result from the decryption code is "Msg15toencrypg==" Here is the code: private EditText plain_msg; private EditText pwd; private TextView result; byte[] iv; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); plain_msg = (EditText

I have a file (mp3) that i Encrypt, my intention is then to download this file to an android device and decrypt it, but during decryption i get an IOException: java.io.IOException: last block incomplete in decryption I am aware of the obvious security flaws in the following code, I'm just trying to get it to work first. Any help on this is appreciated and I am quite a newcomer to coding in general so excuse me in advance if this is a stupid question! Encryption class(Not done in Android, works): public class EncryptFile { public static void main(String args[]) { if (args.length < 1) { System

I am trying to decrypt in NodeJs. It is working in Java. But I am not able to achieve same in Node. node-version: 8.4 Please find my NodeJs code: var crypto = require('crypto'); function decryption (message, key) { var messageArray = Buffer.from(message, 'base64'); // var kekbuf = Buffer(key, 'utf8'); var ivBuffer = new Buffer([0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]); var iv = ivBuffer.slice(0, 16); var decipher = crypto.createDecipheriv('aes-256-cbc', key, iv); decipher.setAutoPadding(false); var dec = decipher.update(messageArray, 'base64'); dec += decipher.final(); return dec.toString(); } Please

I am trying to decrypt the string "~9?8?m???=?T?G" that I receive from a back-end server which uses OpenSSL to encrypt the String using AES-256-CBC. There is the code block: public static String decryptText(String textToDecrypt) { try { byte[] base64TextToDecrypt = Base64.encodeBase64(textToDecrypt.getBytes("UTF-8")); byte[] guid = "fjakdsjkld;asfj".getBytes("UTF-8"); byte[] iv = new byte[16]; System.arraycopy(guid, 0, iv, 0, guid.length); IvParameterSpec ips = new IvParameterSpec(iv); byte[] secret = DECRYPTION_SECRET_HASH.getBytes("UTF-8"); SecretKeySpec secretKey = new SecretKeySpec(secret,

I use encryption AES algorithm, when i encrypt 16 byte(one block) the result is 32 byte. Is this ok? My source code that i used is: package net.sf.andhsli.hotspotlogin; import java.security.SecureRandom; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; /** * Usage: * <pre> * String crypto = SimpleCrypto.encrypt(masterpassword, cleartext) * ... * String cleartext = SimpleCrypto.decrypt(masterpassword, crypto) * </pre> * @author ferenc.hechler */ public class SimpleCrypto { public static String encrypt(String

I am looking for a compression library to use in iPhone application supports decompressing AES 256-bit archives built in Winzip compression utility. Thanks. zlib is part of the iPhone sdk and is a well established and free option. If you're using Xcode you can add it to your project by: Right clicking on the Frameworks folder in your project (you can do it elsewhere but that's likely where you want to put it) Select add file Select existing frameworks Select libz.1.2.3.dylib Thank you very much for the help I finally ened up using ZipArchive library from: http://www.artpol-software.com I had

I have some issues regarding to find a way to achieve the encryption of arbitrary data that can be shared with multiple recipients. Mega seems to do exactly that. As far as I read it encrypts the data before its uploaded to the web server. Still it is possible to share that file with others. How is that done with the encryption? Imagine the following scenario: User Alice uploads a file to the server, it is being encrypted Alice wants to share that file with Bob and Dave. How can Bob and Dave access the file and see its original content (decrypted)? How is that done with the encryption? The