Block_cipher.java - import import import import import java.io. java.nio.ByteBuffer java.security.InvalidKeyException java.security. java.util.Arrays

Block_cipher.java - import import import import import...

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import java.io.UnsupportedEncodingException; import java.nio.ByteBuffer; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import java.util.Arrays; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; public class Block_cipher { public static void main(String[] args) { byte[] k = { (byte) 0xFD, (byte) 0xE8, (byte) 0xF7, (byte) 0xA9, (byte) 0xB8, 0x6C, 0x3B, (byte) 0xFF, (byte) 0x07, (byte) 0xC0, (byte) 0xD3, (byte) 0x9D, (byte) 0x04, (byte) 0x60, (byte) 0x5E, (byte) 0xDD }; byte[] iv = { (byte) 0xFD, (byte) 0xE8, (byte) 0xF7, (byte) 0xA9, (byte) 0xB8, 0x6C, 0x3B, (byte) 0xFF, (byte) 0x07, (byte) 0xC0, (byte) 0xD3, (byte) 0x9D, (byte) 0x04, (byte) 0x60, (byte) 0x5E, (byte) 0xDD }; byte[] nonce = { (byte) 0xFD, (byte) 0xE8, (byte) 0xF7, (byte) 0xA9, (byte) 0xB8, 0x6C, 0x3B, (byte) 0xFF, (byte) 0x07, (byte) 0xC0, (byte) 0xD3, (byte) 0x9D, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 }; String plantext = "The top half of the workspace consists of an arrangement of other existing components to calculate an MD5-HMAC. " + "These individual components are labelled to show which part of the final HMAC output they generate." + " In order for this arrangement to generate a correct result, the HMAC key chosen must have a length of exactly 64 bytes."; byte[] PlainText = null; try { PlainText = plantext.getBytes("ASCII"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("Key : " + byteArrayToHex(k)); System.out.println("iv : " + byteArrayToHex(iv)); System.out.println("nonce : " + byteArrayToHex(nonce)); System.out.println();
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  • Summer '17
  • Cryptography, Block cipher, CBC, TODO Auto-generated catch, 64 bytes

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