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POJava - SHA-256 hashing : Invalid AES key length : 64 bytes
 

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  1. POJava - SHA-256 hashing : Invalid AES key length : 64 bytes
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    <pre><code>public static String doGenerate() { int val = 10000000; Random r = new Random(); int gen = r.nextInt(89999999); int gen1 = r.nextInt(89999999); gen = val + gen; gen1 = val + gen1; String reply = gen + "" + gen1; return reply; } </code></pre> <p>This is the method I use to generate a key I need for the AES algorithm given below.</p> <pre><code>public static void decryptFile(String keyString, String fileName){ try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128); SecretKey key = (SecretKey) new SecretKeySpec( keyString.getBytes(), "AES");// kgen.generateKey(); AESEncrypter encrypter = new AESEncrypter(key); encrypter.decrypt(new FileInputStream( new java.io.File("").getCanonicalFile() + File.separator + "Received"+ File.separator + fileName), new FileOutputStream(new java.io.File("").getCanonicalFile() + File.separator + "Decrypted" + File.separator + fileName)); } catch (Exception e) { e.printStackTrace(); } } </code></pre> <p>This is the AESEncrypter method.</p> <pre><code> public AESEncrypter(SecretKey key) { // Create an 8-byte initialization vector byte[] iv = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }; AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv); try { ecipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); // CBC requires an initialization vector ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec); dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec); } catch (Exception e) { e.printStackTrace(); } } </code></pre> <p>After decrypting I get an invalid key exception: java.security.InvalidKeyException: Invalid AES key length: 64 bytes. Why is this happening? Is there a solution for this?</p>
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    1. CO64 bytes it says..
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