I'm getting the following exception (so far only Android 4.0.4): java.security.NoSuchAlgorithmException: KeyGenerator AES implementation not found at org.apache.harmony.security.fortress.Engine.notFound(Engine.java:177) at org.apache.harmony.security.fortress.Engine.getInstance(Engine.java:151) at javax.crypto.KeyGenerator.getInstance(KeyGenerator.java:103) This is my code: KeyGenerator keyGen = KeyGenerator.getInstance('AES'); keyGen.init(128); SecretKey confidentialityKey = keyGen.generateKey(); Is 128 AES not supported on some versions of Android? You really don't need a key factory for AES in Java. AES keys consist simply of random bytes. So that means you can perform the following: SecureRandom rng = new SecureRandom(); byte[] aesKeyData = new byte[128 / Byte.SIZE]; rng.nextBytes(aesKeyData); SecretKey aesKey = new SecretKeySpec(aesKeyData, 'AES'); // just to show it works Cipher aesCBC = Cipher.getInstance('AES/CBC/PKCS5Padding'); byte[] iv = new byte[aesCBC.getBlockSize()]; rng.nextBytes(iv); aesCBC.init(Cipher.ENCRYPT_MODE, aesKey, new IvParameterSpec(iv)); The only problem is that you cannot generate an AES key on a hardware device this way; for that you would need a KeyFactory. If you have a library that requires a key generator then you are best off installing Bouncy Castle or - to avoid naming conflicts - Spongy Castle.
SunTlsRsaPremasterSecret KeyGenerator not available #2.% java -version java. Java.security.NoSuchAlgorithmException: SunTlsRsaPremasterSecret KeyGenerator. Red Hat Customer Portal. KeyGenerator not available' when running secured. Available at javax.crypto.KeyGenerator.(KeyGenerator.java.
I have an issue with my java code. I'm trying to encrypt a file. However, when I run my java code I get 'java.security. Dubstep Snare Wav. InvalidKeyException: Invalid AES key length: 162 bytes'.
AES is a symmetric algorithm, hence they use of KeyPairGenerator is not supported. To generate a key with AES you call KeyGenerator KeyGenerator kgen = KeyGenerator.getInstance('AES'); kgen.init(128); //set keysize, can be 128, 192, and 256 By looking at the rest of your code, it looks like you are trying to achive asymmetric encryption (since you call getPublic() and getPrivate() etc), so I advice you to switch to using RSA or any other asymmetric algorithm that java supports.
You will most likley only need to replace AES with RSA in your getInstance(); calls, and pherhaps some fine-tuning. As far as I know, AES is symmetric encryption algorithm i.e. Crack Para Sniper Elite V1.
It needs only one key for encryption/decryption. From the JavaDoc of java.security.KeyPairGenerator: The KeyPairGenerator class is used to generate pairs of public and private keys. Meaning that it should be used for asymmetric encryption algorithms. For symmetric encryption algorithms one should use javax.crypto.KeyGenerator. However, I advise simply mimicking some tutorial on how to encrypt / decrypt byte array in Java using AES like.
It uses sun.misc.Base64Encoder / Base64Decoder classes to encode / decode byte array to / from String, however you may skip this step. Hope this helps. How can you use a keypair generator for AES? AES is a symmetric key algorithm. That means if you encrypt data using a key 'k', then you will have to decrypt it also using the same key 'k'. But when you generate key pair, as the name suggests, two keys are generated and if you encrypt using one of the keys, you can decrypt only using the other key.
This is the base for. If you want to use keypair generator use an algorithm like 'rsa' or 'dsa' in the getInstance() method like this: KeyPairGenerator keygen=KeyPairGenerator.getInstance('rsa'); I think your code should now work fine after making the above change.