I use a simple category on NSData that uses the built-in CommonCrypto framework to do AES 256-bit encryption. I use this on the Mac but it should work OK on iPhone too: #import <CommonCrypto/CommonCryptor.h> @implementation NSData (AESAdditions) – (NSData*)AES256EncryptWithKey:(NSString*)key { // ‘key’ should be 32 bytes for AES256, will be null-padded otherwise char keyPtr[kCCKeySizeAES256 + … Read more
Finally figured this one out. In the event someone needs to integrate openssl and .NET without using the openssl wrappers, I’ll share the results here. 1) The main issue with my original code (as in the question) is that you must initialize the BlockSize and KeySize on your RijndaelManaged instance BEFORE setting the key or … Read more
Use AES. In more details: DES is the old “data encryption standard” from the seventies. Its key size is too short for proper security (56 effective bits; this can be brute-forced, as has been demonstrated more than ten years ago). Also, DES uses 64-bit blocks, which raises some potential issues when encrypting several gigabytes of … Read more
I made a gist with iOS/Android/Node.js AES256 same result encoding, https://gist.github.com/m1entus/f70d4d1465b90d9ee024
When a message is encrypted in this way: CryptoJS.AES.encrypt(“message”, “passphrase”) a password-based approach is used. For that CryptoJS generates a new salt and uses this salt in conjunction with the passphrase to derive the key and IV (I’ve recreated a derivation function for this question). After the ciphertext is produced a special OpenSSL formatter is … Read more
Solved it using Bouncy Castle library. Here is the code: package example; import java.util.Arrays; import org.apache.commons.codec.binary.Base64; import org.bouncycastle.crypto.BufferedBlockCipher; import org.bouncycastle.crypto.CipherParameters; import org.bouncycastle.crypto.InvalidCipherTextException; import org.bouncycastle.crypto.engines.AESEngine; import org.bouncycastle.crypto.generators.OpenSSLPBEParametersGenerator; import org.bouncycastle.crypto.modes.CBCBlockCipher; import org.bouncycastle.crypto.paddings.BlockCipherPadding; import org.bouncycastle.crypto.paddings.PKCS7Padding; import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher; public class OpenSSLAesDecrypter { private static final int AES_NIVBITS = 128; // CBC Initialization Vector (same as cipher block size) [16 … Read more
Ok, so there was a change to Crypto in the switch from 0.8 to 0.10 Crypto methods return Buffer objects by default, rather than binary-encoded strings This means the above code needs to specify encodings. These four lines: decoded = decipher.update(encryptdata); decoded += decipher.final(); encryptdata = encipher.update(cleardata); encryptdata += encipher.final(); Are changed to: decoded = … Read more
If you use a block-chaining mode like CBC, you need to provide an IvParameterSpec to the Cipher as well. So you can initialize an IvParameterSpec like this: // build the initialization vector. This example is all zeros, but it // could be any value or generated using a random number generator. byte[] iv = { … Read more
CryptoSwift Example Updated to Swift 2 import Foundation import CryptoSwift extension String { func aesEncrypt(key: String, iv: String) throws -> String{ let data = self.dataUsingEncoding(NSUTF8StringEncoding) let enc = try AES(key: key, iv: iv, blockMode:.CBC).encrypt(data!.arrayOfBytes(), padding: PKCS7()) let encData = NSData(bytes: enc, length: Int(enc.count)) let base64String: String = encData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0)); let result = String(base64String) return result … Read more
http://android-developers.blogspot.in/2013/02/using-cryptography-to-store-credentials.html http://developer.android.com/reference/javax/crypto/SecretKeyFactory.html Check the above links. Use the below for reference.Modify the below according to your needs. Usage try { DescEncrypter ec = new DescEncrypter(); byte[] cipherText =ec.encrypt(“hi”, “hello”); String enc = new String(cipherText,”UTF-8″); String decryp= ec.decrypt(“hi”, cipherText); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } DescEncrypter.java import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.IvParameterSpec; import … Read more