![]() Since this version, it is no longer necessary to download the policy files from the Oracle website and install it. This behavior changed in the u151 and u152 version of Java 8. With this change, you can now use AES with key sizes 192 and 256 without exception. To solve that you have to go to this website, download the Unlimited Strength Jurisdiction Policy Files, unzip it, go to the /lib/security directory, and replace the two files local_policy.jar and US_export_policy.jar with the two files from the download. (new String(plainText)) īut when you change the key length to 192 ( keyGen.init(192, random) ) or 256 ( keyGen.init(256, random) ) bits the java runtime throws an exception: Exception in thread "main" : Illegal key size GCMParameterSpec spec = new GCMParameterSpec(128, iv) Ĭipher.init(Cipher.ENCRYPT_MODE, key, spec) īyte cipherText = cipher.doFinal(input) Ĭipher.init(Cipher.DECRYPT_MODE, key, spec) īyte plainText = cipher.doFinal(cipherText) KeyGenerator keyGen = KeyGenerator.getInstance("AES") Ĭipher cipher = Cipher.getInstance("AES/GCM/NoPadding", "SunJCE") SecureRandom random = SecureRandom.getInstanceStrong() ![]() byte input = "My super secret text".getBytes() When you look at the following program that encrypts and decrypts a string with AES it works fine when you use a key length of 128 bits ( keyGen.init(128, random) ). When you use the Java Cryptography Extension (JCE), you may already know that the Java runtime out of the box enforces a limitation on specific key length parameters. ![]() ![]() You no longer need to install the policy file in the JRE or set the security property crypto.policy. In this version, the unlimited policy is enabled by default. Update January 16, 2018: Oracle released Java 8 u162. JCE policy changes in Java SE 8u151, 8u152 and 8u162 Home | Send Feedback JCE policy changes in Java SE 8u151, 8u152 and 8u162 ![]()
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