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POEncryption class working in java but not in android, why? What else can i do?
 

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  1. POEncryption class working in java but not in android, why? What else can i do?
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    <p>I did a simple encrypt/decrypt string class in java and tested it. It workes fine, now im trying to use it in an android device to encrypt a string, send it to my server and there decrypt it. All using the same custom class. Why is this not working? Is it simply not supported? what else can i do to easily encrypt/decrypt a string for this purpose? Base64 is not accepted:)</p> <pre><code>package crypto; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; public class Crypto { public static byte[] encrypt(String message) throws Exception { String symmetricKey = "25Ae1f1711%z1 )1"; SecretKeySpec aesKey = new SecretKeySpec(symmetricKey.getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding", "SunJCE"); cipher.init(Cipher.ENCRYPT_MODE, key); return cipher.doFinal(message.getBytes()); } public static String decrypt(byte[] encryptedMessage) throws Exception { String symmetricKey = "25Ae1f1711%z1 )1"; SecretKeySpec aesKey = new SecretKeySpec(symmetricKey.getBytes(), "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding", "SunJCE"); cipher.init(Cipher.DECRYPT_MODE, key); return new String(cipher.doFinal(encryptedMessage)); } } </code></pre> <p>In logcat i can see the following exception pop up: java.security.NoSuchProviderException: Provider not avalible: SunJCE</p> <p>I deleted the specified provider "SunJCE" from the line.</p> <pre><code>Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding", "SunJCE"); </code></pre> <p>i found the solution to this over <a href="https://stackoverflow.com/questions/16335223/nosuchproviderexception-when-encrypting-string-with-3des">here</a></p> <p>now i get this error at the serverside instead:</p> <pre><code>javax.crypto.IllegalBlockSizeException: Input length must be multiple of 16 when decrypting with padded cipher at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:750) at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:676) at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:317) at javax.crypto.Cipher.doFinal(Cipher.java:1813) at crypto.Crypto.decrypt(Crypto.java:20) at io.network.UDPServer.run(UDPServer.java:37 </code></pre> <p>tried with BC but i still have the same error</p>
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    1. COhttp://stackoverflow.com/questions/17079579/aes-algo-decryption-issue/17080884#17080884. check this might help.
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      1. USRaghunandan
    2. COWhat do you mean by not working?
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      1. USNishant Shreshth
    3. COThe encryption methods available on a VM are version specific. I suggest you get a list of encryptions supported on your system and use one of those.
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      1. POEncryption class working in java but not in android, why? What else can i do?
      1. USPeter Lawrey
 

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