Java/Security/Encryption

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Basic symmetric encryption example

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; /** 

* Basic symmetric encryption example
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());        
   byte[] input = " www.jexp.ru ".getBytes();
   byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
       0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };
   SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
   Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding", "BC");
   System.out.println("input text : " + new String(input));
   // encryption pass
   byte[] cipherText = new byte[input.length];
   cipher.init(Cipher.ENCRYPT_MODE, key);
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println("cipher text: " + new String(cipherText) + " bytes: " + ctLength);
   // decryption pass
   byte[] plainText = new byte[ctLength];
   cipher.init(Cipher.DECRYPT_MODE, key);
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println("plain text : " + new String(plainText) + " bytes: " + ptLength);
 }

} 


 </source>



Basic symmetric encryption example with CTR using DES

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; /** 

* Basic symmetric encryption example with CTR using DES
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());        
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd,
       (byte) 0xef };
   byte[] ivBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x01 };
   SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");
   IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
   Cipher cipher = Cipher.getInstance("DES/CTR/NoPadding", "BC");
   System.out.println("input : " + new String(input));
   // encryption pass
   cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println("cipher: " + new String(cipherText) + " bytes: " + ctLength);
   // decryption pass
   cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
   byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println("plain : " + new String(plainText) + " bytes: " + ptLength);
 }

} 


 </source>



Basic symmetric encryption example with padding and CBC using DES

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; /** 

* Basic symmetric encryption example with padding and CBC using DES
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());        
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd,
       (byte) 0xef };
   byte[] ivBytes = new byte[] { 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00 };
   SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");
   IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
   Cipher cipher = Cipher.getInstance("DES/CBC/PKCS7Padding", "BC");
   System.out.println("input : " + new String(input));
   // encryption pass
   cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println("cipher: " + new String(cipherText) + " bytes: " + ctLength);
   // decryption pass
   cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
   byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println("plain : " + new String(plainText) + " bytes: " + ptLength);
 }

} 


 </source>



Basic symmetric encryption example with padding and ECB using DES

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; /** 

* Basic symmetric encryption example with padding and ECB using DES
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());        
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd,
       (byte) 0xef };
   SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");
   Cipher cipher = Cipher.getInstance("DES/ECB/PKCS7Padding", "BC");
   System.out.println("input : " + new String(input));
   // encryption pass
   cipher.init(Cipher.ENCRYPT_MODE, key);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println("cipher: " + new String(cipherText) + " bytes: " + ctLength);
   // decryption pass
   cipher.init(Cipher.DECRYPT_MODE, key);
   byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println("plain : " + new String(plainText) + " bytes: " + ptLength);
 }

} 


 </source>



CBC using DES with an IV based on a nonce: a hypothetical message number

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; /** 

* CBC using DES with an IV based on a nonce. In this case a hypothetical
* message number.
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());        
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd,
       (byte) 0xef };
   byte[] msgNumber = new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
   IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);
   SecretKeySpec key = new SecretKeySpec(keyBytes, "DES");
   Cipher cipher = Cipher.getInstance("DES/CBC/PKCS7Padding", "BC");
   System.out.println("input : " + new String(input));
   // encryption pass
   cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
   IvParameterSpec encryptionIv = new IvParameterSpec(cipher.doFinal(msgNumber), 0, 8);
   // encrypt message
   cipher.init(Cipher.ENCRYPT_MODE, key, encryptionIv);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println("cipher: " + new String(cipherText) + " bytes: " + ctLength);
   cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
   IvParameterSpec decryptionIv = new IvParameterSpec(cipher.doFinal(msgNumber), 0, 8);
   // decrypt message
   cipher.init(Cipher.DECRYPT_MODE, key, decryptionIv);
   byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println("plain : " + new String(plainText) + " bytes: " + ptLength);
 }

} 


 </source>



Cipher with AESECBPKCS7Padding BC

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
   
   byte[] input = "jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
       0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };
   SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
   Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
   System.out.println(new String(input));
   // encryption pass
   cipher.init(Cipher.ENCRYPT_MODE, key);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println(new String(cipherText));
   System.out.println(ctLength);
   // decryption pass
   cipher.init(Cipher.DECRYPT_MODE, key);
   byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println(new String(plainText));
   System.out.println(ptLength);
 }

} 



 </source>



Create an encrypted string for password

   <source lang="java">

import java.security.MessageDigest; public class Main { 

 public static void main(String[] args) throws Exception {
   String password = "secret";
   String algorithm = "SHA";
   byte[] plainText = password.getBytes();
   MessageDigest md = MessageDigest.getInstance(algorithm);
   md.reset();
   md.update(plainText);
   byte[] encodedPassword = md.digest();
   StringBuilder sb = new StringBuilder();
   for (int i = 0; i < encodedPassword.length; i++) {
     if ((encodedPassword[i] & 0xff) < 0x10) {
       sb.append("0");
     }
     sb.append(Long.toString(encodedPassword[i] & 0xff, 16));
   }
   System.out.println("Plain    : " + password);
   System.out.println("Encrypted: " + sb.toString());
 }

} 


 </source>



Cryptography Streams: True Mirror

   <source lang="java">

import java.io.InputStream; import java.net.URL; import java.security.MessageDigest; public class Main { 

 public static void main(String[] args) throws Exception {
   URL source = new URL("http://www.a.ru");
   URL mirror = new URL("http://www.b.ru");
   byte[] sourceDigest = getDigestFromURL(source);
   byte[] mirrorDigest = getDigestFromURL(mirror);
   if (MessageDigest.isEqual(sourceDigest, mirrorDigest)) {
     System.out.println(mirror + " is up to date");
   } else {
     System.out.println(mirror + " needs to be updated");
   }
 }
 public static byte[] getDigestFromURL(URL u) throws Exception {
   MessageDigest md5 = MessageDigest.getInstance("MD5");
   InputStream in = u.openStream();
   byte[] data = new byte[1024];
   int bytesRead = -1;
   while ((bytesRead = in.read(data)) >= 0) {
     md5.update(data, 0, bytesRead);
   }
   return md5.digest();
 }

} 



 </source>



Cryptography Streams: URLDigest

   <source lang="java">

import java.io.InputStream; import java.math.BigInteger; import java.net.URL; import java.security.MessageDigest; import java.util.Arrays; public class Main { 

 public static void main(String[] args) throws Exception {
   URL u = new URL("http://www.google.ru");
   InputStream in = u.openStream();
   MessageDigest sha = MessageDigest.getInstance("SHA");
   byte[] data = new byte[1024];
   int bytesRead = -1;
   while ((bytesRead = in.read(data)) >= 0) {
     sha.update(data, 0, bytesRead);
   }
   byte[] result = sha.digest();
   System.out.println(Arrays.toString(result));
   System.out.println(new BigInteger(result));
 }

} 


 </source>



Easy Blowfish encryption

   <source lang="java">

/** 

* $RCSfile$
* $Revision: 3657 $
* $Date: 2002-09-09 08:31:31 -0700 (Mon, 09 Sep 2002) $
*
* Adapted from Markus Hahn"s Blowfish package so that all functionality is
* in a single source file. Please visit the following URL for his excellent
* package: http://www.hotpixel.net/software.html
*
* Copyright (c) 1997-2002 Markus Hahn <markus_hahn@gmx.net>
*
* Released under the Apache 2.0 license.
*/

import java.security.MessageDigest; import java.util.Random; /**

* A class that provides easy Blowfish encryption.

* * @author Markus Hahn <markus_hahn@gmx.net> * @author Gaston Dombiak */ public class Blowfish { private BlowfishCBC m_bfish; private static Random m_rndGen = new Random(); /** * Creates a new Blowfish object using the specified key (oversized * password will be cut). * * @param password the password (treated as a real unicode array) */ public Blowfish(String password) { // hash down the password to a 160bit key MessageDigest digest = null; try { digest = MessageDigest.getInstance("SHA1"); digest.update(password.getBytes()); } catch (Exception e) { System.out.println(e); } // setup the encryptor (use a dummy IV) m_bfish = new BlowfishCBC(digest.digest(), 0); digest.reset(); } /** * Encrypts a string (treated in UNICODE) using the * standard Java random generator, which isn"t that * great for creating IVs * * @param sPlainText string to encrypt * @return encrypted string in binhex format */ public String encryptString(String sPlainText) { // get the IV long lCBCIV; synchronized (m_rndGen) { lCBCIV = m_rndGen.nextLong(); } // map the call; return encStr(sPlainText, lCBCIV); } // Internal routine for string encryption private String encStr(String sPlainText, long lNewCBCIV) { // allocate the buffer (align to the next 8 byte border plus padding) int nStrLen = sPlainText.length(); byte[] buf = new byte [((nStrLen << 1) & 0xfffffff8) + 8]; // copy all bytes of the string into the buffer (use network byte order) int nI; int nPos = 0; for (nI = 0; nI < nStrLen; nI++) { char cActChar = sPlainText.charAt(nI); buf[nPos++] = (byte) ((cActChar >> 8) & 0x0ff); buf[nPos++] = (byte) (cActChar & 0x0ff) ; } // pad the rest with the PKCS5 scheme byte bPadVal = (byte)(buf.length - (nStrLen << 1)); while (nPos < buf.length) { buf[nPos++] = bPadVal; } synchronized (m_bfish) { // create the encryptor m_bfish.setCBCIV(lNewCBCIV); // encrypt the buffer m_bfish.encrypt(buf); } // return the binhex string byte[] newCBCIV = new byte[BlowfishCBC.BLOCKSIZE]; longToByteArray(lNewCBCIV, newCBCIV, 0); return bytesToBinHex(newCBCIV, 0, BlowfishCBC.BLOCKSIZE) + bytesToBinHex(buf, 0, buf.length); } /** * decrypts a hexbin string (handling is case sensitive) * @param sCipherText hexbin string to decrypt * @return decrypted string (null equals an error) */ public String decryptString(String sCipherText) { // get the number of estimated bytes in the string (cut off broken blocks) int nLen = (sCipherText.length() >> 1) & ~7; // does the given stuff make sense (at least the CBC IV)? if (nLen < BlowfishECB.BLOCKSIZE) return null; // get the CBC IV byte[] cbciv = new byte[BlowfishCBC.BLOCKSIZE]; int nNumOfBytes = binHexToBytes(sCipherText, cbciv, 0, 0, BlowfishCBC.BLOCKSIZE); if (nNumOfBytes < BlowfishCBC.BLOCKSIZE) return null; // something left to decrypt? nLen -= BlowfishCBC.BLOCKSIZE; if (nLen == 0) { return ""; } // get all data bytes now byte[] buf = new byte[nLen]; nNumOfBytes = binHexToBytes(sCipherText, buf, BlowfishCBC.BLOCKSIZE * 2, 0, nLen); // we cannot accept broken binhex sequences due to padding // and decryption if (nNumOfBytes < nLen) { return null; } synchronized (m_bfish) { // (got it) m_bfish.setCBCIV(cbciv); // decrypt the buffer m_bfish.decrypt(buf); } // get the last padding byte int nPadByte = (int)buf[buf.length - 1] & 0x0ff; // ( try to get all information if the padding doesn"t seem to be correct) if ((nPadByte > 8) || (nPadByte < 0)) { nPadByte = 0; } // calculate the real size of this message nNumOfBytes -= nPadByte; if (nNumOfBytes < 0) { return ""; } // success return byteArrayToUNCString(buf, 0, nNumOfBytes); } /** * destroys (clears) the encryption engine, * after that the instance is not valid anymore */ public void destroy() { m_bfish.cleanUp(); } /** * implementation of the Blowfish encryption algorithm in ECB mode * @author Markus Hahn <markus_hahn@gmx.net> * @version Feburary 14, 2001 */ private static class BlowfishECB { /** maximum possible key length */ public final static int MAXKEYLENGTH = 56; /** block size of this cipher (in bytes) */ public final static int BLOCKSIZE = 8; // size of the single boxes final static int PBOX_ENTRIES = 18; final static int SBOX_ENTRIES = 256; // the boxes int[] m_pbox; int[] m_sbox1; int[] m_sbox2; int[] m_sbox3; int[] m_sbox4; /** * default constructor * @param bfkey key material, up to MAXKEYLENGTH bytes */ public BlowfishECB(byte[] bfkey) { // create the boxes int nI; m_pbox = new int[PBOX_ENTRIES]; for (nI = 0; nI < PBOX_ENTRIES; nI++) { m_pbox[nI] = pbox_init[nI]; } m_sbox1 = new int[SBOX_ENTRIES]; m_sbox2 = new int[SBOX_ENTRIES]; m_sbox3 = new int[SBOX_ENTRIES]; m_sbox4 = new int[SBOX_ENTRIES]; for (nI = 0; nI < SBOX_ENTRIES; nI++) { m_sbox1[nI] = sbox_init_1[nI]; m_sbox2[nI] = sbox_init_2[nI]; m_sbox3[nI] = sbox_init_3[nI]; m_sbox4[nI] = sbox_init_4[nI]; } // xor the key over the p-boxes int nLen = bfkey.length; if (nLen == 0) return; // such a setup is also valid (zero key "encryption" is possible) int nKeyPos = 0; int nBuild = 0; int nJ; for (nI = 0; nI < PBOX_ENTRIES; nI++) { for (nJ = 0; nJ < 4; nJ++) { nBuild = (nBuild << 8) | (((int) bfkey[nKeyPos]) & 0x0ff); if (++nKeyPos == nLen) { nKeyPos = 0; } } m_pbox[nI] ^= nBuild; } // encrypt all boxes with the all zero string long lZero = 0; // (same as above) for (nI = 0; nI < PBOX_ENTRIES; nI += 2) { lZero = encryptBlock(lZero); m_pbox[nI] = (int) (lZero >>> 32); m_pbox[nI+1] = (int) (lZero & 0x0ffffffffL); } for (nI = 0; nI < SBOX_ENTRIES; nI += 2) { lZero = encryptBlock(lZero); m_sbox1[nI] = (int) (lZero >>> 32); m_sbox1[nI+1] = (int) (lZero & 0x0ffffffffL); } for (nI = 0; nI < SBOX_ENTRIES; nI += 2) { lZero = encryptBlock(lZero); m_sbox2[nI] = (int) (lZero >>> 32); m_sbox2[nI+1] = (int) (lZero & 0x0ffffffffL); } for (nI = 0; nI < SBOX_ENTRIES; nI += 2) { lZero = encryptBlock(lZero); m_sbox3[nI] = (int) (lZero >>> 32); m_sbox3[nI+1] = (int) (lZero & 0x0ffffffffL); } for (nI = 0; nI < SBOX_ENTRIES; nI += 2) { lZero = encryptBlock(lZero); m_sbox4[nI] = (int) (lZero >>> 32); m_sbox4[nI+1] = (int) (lZero & 0x0ffffffffL); } } /** * to clear data in the boxes before an instance is freed */ public void cleanUp() { int nI; for (nI = 0; nI < PBOX_ENTRIES; nI++) { m_pbox[nI] = 0; } for (nI = 0; nI < SBOX_ENTRIES; nI++) { m_sbox1[nI] = m_sbox2[nI] = m_sbox3[nI] = m_sbox4[nI] = 0; } } /** * selftest routine, to check e.g. for a valid class file transmission * @return true: selftest passed / false: selftest failed */ public static boolean selfTest() { // test vector #1 (checking for the "signed bug") byte[] testKey1 = { (byte) 0x1c, (byte) 0x58, (byte) 0x7f, (byte) 0x1c, (byte) 0x13, (byte) 0x92, (byte) 0x4f, (byte) 0xef }; int[] tv_p1 = { 0x30553228, 0x6d6f295a }; int[] tv_c1 = { 0x55cb3774, 0xd13ef201 }; int[] tv_t1 = new int[2]; // test vector #2 (offical vector by Bruce Schneier) String sTestKey2 = "Who is John Galt?"; byte[] testKey2 = sTestKey2.getBytes(); int[] tv_p2 = { 0xfedcba98, 0x76543210 }; int[] tv_c2 = { 0xcc91732b, 0x8022f684 }; int[] tv_t2 = new int[2]; // start the tests, check for a proper decryption, too BlowfishECB testbf1 = new BlowfishECB(testKey1); testbf1.encrypt(tv_p1, tv_t1); if ((tv_t1[0] != tv_c1[0]) || (tv_t1[1] != tv_c1[1])) { return false; } testbf1.decrypt(tv_t1); if ((tv_t1[0] != tv_p1[0]) || (tv_t1[1] != tv_p1[1])) { return false; } BlowfishECB testbf2 = new BlowfishECB(testKey2); testbf2.encrypt(tv_p2, tv_t2); if ((tv_t2[0] != tv_c2[0]) || (tv_t2[1] != tv_c2[1])) { return false; } testbf2.decrypt(tv_t2); if ((tv_t2[0] != tv_p2[0]) || (tv_t2[1] != tv_p2[1])) { return false; } // all tests passed return true; } // internal routine to encrypt a 64bit block protected long encryptBlock(long lPlainBlock) { // split the block in two 32 bit halves int nHi = longHi32(lPlainBlock); int nLo = longLo32(lPlainBlock); // encrypt the block, gain more speed by unrooling the loop // (we avoid swapping by using nHi and nLo alternating at // odd an even loop nubers) and using local references int[] sbox1 = m_sbox1; int[] sbox2 = m_sbox2; int[] sbox3 = m_sbox3; int[] sbox4 = m_sbox4; int[] pbox = m_pbox; nHi ^= pbox[0]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[1]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[2]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[3]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[4]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[5]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[6]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[7]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[8]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[9]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[10]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[11]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[12]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[13]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[14]; nLo ^= (((sbox1[nHi >>> 24] + sbox2[(nHi >>> 16) & 0x0ff]) ^ sbox3[(nHi >>> 8) & 0x0ff]) + sbox4[nHi & 0x0ff]) ^ pbox[15]; nHi ^= (((sbox1[nLo >>> 24] + sbox2[(nLo >>> 16) & 0x0ff]) ^ sbox3[(nLo >>> 8) & 0x0ff]) + sbox4[nLo & 0x0ff]) ^ pbox[16]; // finalize, cross and return the reassembled block return makeLong(nHi, nLo ^ pbox[17]); } // internal routine to decrypt a 64bit block protected long decryptBlock(long lCipherBlock) { // (same as above) int nHi = longHi32(lCipherBlock); int nLo = longLo32(lCipherBlock); nHi ^= m_pbox[17]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[16]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[15]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[14]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[13]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[12]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[11]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[10]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[9]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[8]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[7]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[6]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[5]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[4]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[3]; nLo ^= (((m_sbox1[nHi >>> 24] + m_sbox2[(nHi >>> 16) & 0x0ff]) ^ m_sbox3[(nHi >>> 8) & 0x0ff]) + m_sbox4[nHi & 0x0ff]) ^ m_pbox[2]; nHi ^= (((m_sbox1[nLo >>> 24] + m_sbox2[(nLo >>> 16) & 0x0ff]) ^ m_sbox3[(nLo >>> 8) & 0x0ff]) + m_sbox4[nLo & 0x0ff]) ^ m_pbox[1]; return makeLong(nHi, nLo ^ m_pbox[0]); } /** * Encrypts a byte buffer (should be aligned to an 8 byte border) to another * buffer (of the same size or bigger) * * @param inbuffer buffer with plaintext data * @param outbuffer buffer to get the ciphertext data */ public void encrypt(byte[] inbuffer, byte[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // encrypt a temporary 64bit block lTemp = byteArrayToLong(inbuffer, nI); lTemp = encryptBlock(lTemp); longToByteArray(lTemp, outbuffer, nI); } } /** * encrypts a byte buffer (should be aligned to an 8 byte border) to itself * @param buffer buffer to encrypt */ public void encrypt(byte[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // encrypt a temporary 64bit block lTemp = byteArrayToLong(buffer, nI); lTemp = encryptBlock(lTemp); longToByteArray(lTemp, buffer, nI); } } /** * encrypts an integer buffer (should be aligned to an * two integer border) to another int buffer (of the * same size or bigger) * @param inbuffer buffer with plaintext data * @param outbuffer buffer to get the ciphertext data */ public void encrypt(int[] inbuffer, int[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // encrypt a temporary 64bit block lTemp = intArrayToLong(inbuffer, nI); lTemp = encryptBlock(lTemp); longToIntArray(lTemp, outbuffer, nI); } } /** * encrypts an int buffer (should be aligned to a * two integer border) * @param buffer buffer to encrypt */ public void encrypt(int[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // encrypt a temporary 64bit block lTemp = intArrayToLong(buffer, nI); lTemp = encryptBlock(lTemp); longToIntArray(lTemp, buffer, nI); } } /** * encrypts a long buffer to another long buffer (of the same size or bigger) * @param inbuffer buffer with plaintext data * @param outbuffer buffer to get the ciphertext data */ public void encrypt(long[] inbuffer, long[] outbuffer) { int nLen = inbuffer.length; for (int nI = 0; nI < nLen; nI++) { outbuffer[nI] = encryptBlock(inbuffer[nI]); } } /** * encrypts a long buffer to itself * @param buffer buffer to encrypt */ public void encrypt(long[] buffer) { int nLen = buffer.length; for (int nI = 0; nI < nLen; nI++) { buffer[nI] = encryptBlock(buffer[nI]); } } /** * decrypts a byte buffer (should be aligned to an 8 byte border) * to another byte buffer (of the same size or bigger) * @param inbuffer buffer with ciphertext data * @param outbuffer buffer to get the plaintext data */ public void decrypt(byte[] inbuffer, byte[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // decrypt a temporary 64bit block lTemp = byteArrayToLong(inbuffer, nI); lTemp = decryptBlock(lTemp); longToByteArray(lTemp, outbuffer, nI); } } /** * decrypts a byte buffer (should be aligned to an 8 byte border) to itself * @param buffer buffer to decrypt */ public void decrypt(byte[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // decrypt over a temporary 64bit block lTemp = byteArrayToLong(buffer, nI); lTemp = decryptBlock(lTemp); longToByteArray(lTemp, buffer, nI); } } /** * decrypts an integer buffer (should be aligned to an * two integer border) to another int buffer (of the same size or bigger) * @param inbuffer buffer with ciphertext data * @param outbuffer buffer to get the plaintext data */ public void decrypt(int[] inbuffer, int[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // decrypt a temporary 64bit block lTemp = intArrayToLong(inbuffer, nI); lTemp = decryptBlock(lTemp); longToIntArray(lTemp, outbuffer, nI); } } /** * decrypts an int buffer (should be aligned to an * two integer border) * @param buffer buffer to decrypt */ public void decrypt(int[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // decrypt a temporary 64bit block lTemp = intArrayToLong(buffer, nI); lTemp = decryptBlock(lTemp); longToIntArray(lTemp, buffer, nI); } } /** * decrypts a long buffer to another long buffer (of the same size or bigger) * @param inbuffer buffer with ciphertext data * @param outbuffer buffer to get the plaintext data */ public void decrypt(long[] inbuffer, long[] outbuffer) { int nLen = inbuffer.length; for (int nI = 0; nI < nLen; nI++) { outbuffer[nI] = decryptBlock(inbuffer[nI]); } } /** * decrypts a long buffer to itself * @param buffer buffer to decrypt */ public void decrypt(long[] buffer) { int nLen = buffer.length; for (int nI = 0; nI < nLen; nI++) { buffer[nI] = decryptBlock(buffer[nI]); } } // the boxes init. data, // FIXME: it might be better to create them at runtime to make the class // file smaller, e.g. by calculating the hexdigits of pi (default) // or just a fixed random sequence (out of the standard) final static int pbox_init[] = { 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 0x9216d5d9, 0x8979fb1b }; final static int sbox_init_1[] = { 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a }; final static int sbox_init_2[] = { 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7 }; final static int sbox_init_3[] = { 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0 }; final static int sbox_init_4[] = { 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6 }; } private static class BlowfishCBC extends BlowfishECB { // here we hold the CBC IV long m_lCBCIV; /** * get the current CBC IV (for cipher resets) * @return current CBC IV */ public long getCBCIV() { return m_lCBCIV; } /** * get the current CBC IV (for cipher resets) * @param dest wher eto put current CBC IV in network byte ordered array */ public void getCBCIV(byte[] dest) { longToByteArray(m_lCBCIV, dest, 0); } /** * set the current CBC IV (for cipher resets) * @param lNewCBCIV the new CBC IV */ public void setCBCIV(long lNewCBCIV) { m_lCBCIV = lNewCBCIV; } /** * set the current CBC IV (for cipher resets) * @param newCBCIV the new CBC IV in network byte ordered array */ public void setCBCIV(byte[] newCBCIV) { m_lCBCIV = byteArrayToLong(newCBCIV, 0); } /** * constructor, stores a zero CBC IV * @param bfkey key material, up to MAXKEYLENGTH bytes */ public BlowfishCBC(byte[] bfkey) { super(bfkey); // store zero CBCB IV setCBCIV(0); } /** * constructor * @param bfkey key material, up to MAXKEYLENGTH bytes * @param lInitCBCIV the CBC IV */ public BlowfishCBC(byte[] bfkey, long lInitCBCIV) { super(bfkey); // store the CBCB IV setCBCIV(lInitCBCIV); } /** * constructor * @param bfkey key material, up to MAXKEYLENGTH bytes * @param initCBCIV the CBC IV (array with min. BLOCKSIZE bytes) */ public BlowfishCBC(byte[] bfkey, byte[] initCBCIV) { super(bfkey); // store the CBCB IV setCBCIV(initCBCIV); } /** * cleans up all critical internals, * call this if you don"t need an instance anymore */ public void cleanUp() { m_lCBCIV = 0; super.cleanUp(); } // internal routine to encrypt a block in CBC mode private long encryptBlockCBC(long lPlainblock) { // chain with the CBC IV lPlainblock ^= m_lCBCIV; // encrypt the block lPlainblock = super.encryptBlock(lPlainblock); // the encrypted block is the new CBC IV return (m_lCBCIV = lPlainblock); } // internal routine to decrypt a block in CBC mode private long decryptBlockCBC(long lCipherblock) { // save the current block long lTemp = lCipherblock; // decrypt the block lCipherblock = super.decryptBlock(lCipherblock); // dechain the block lCipherblock ^= m_lCBCIV; // set the new CBC IV m_lCBCIV = lTemp; // return the decrypted block return lCipherblock; } /** * encrypts a byte buffer (should be aligned to an 8 byte border) * to another buffer (of the same size or bigger) * @param inbuffer buffer with plaintext data * @param outbuffer buffer to get the ciphertext data */ public void encrypt(byte[] inbuffer, byte[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // encrypt a temporary 64bit block lTemp = byteArrayToLong(inbuffer, nI); lTemp = encryptBlockCBC(lTemp); longToByteArray(lTemp, outbuffer, nI); } } /** * encrypts a byte buffer (should be aligned to an 8 byte border) to itself * @param buffer buffer to encrypt */ public void encrypt(byte[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // encrypt a temporary 64bit block lTemp = byteArrayToLong(buffer, nI); lTemp = encryptBlockCBC(lTemp); longToByteArray(lTemp, buffer, nI); } } /** * encrypts an int buffer (should be aligned to an * two integer border) to another int buffer (of the same * size or bigger) * @param inbuffer buffer with plaintext data * @param outbuffer buffer to get the ciphertext data */ public void encrypt(int[] inbuffer, int[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // encrypt a temporary 64bit block lTemp = intArrayToLong(inbuffer, nI); lTemp = encryptBlockCBC(lTemp); longToIntArray(lTemp, outbuffer, nI); } } /** * encrypts an integer buffer (should be aligned to an * @param buffer buffer to encrypt */ public void encrypt(int[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // encrypt a temporary 64bit block lTemp = intArrayToLong(buffer, nI); lTemp = encryptBlockCBC(lTemp); longToIntArray(lTemp, buffer, nI); } } /** * encrypts a long buffer to another long buffer (of the same size or bigger) * @param inbuffer buffer with plaintext data * @param outbuffer buffer to get the ciphertext data */ public void encrypt(long[] inbuffer, long[] outbuffer) { int nLen = inbuffer.length; for (int nI = 0; nI < nLen; nI++) { outbuffer[nI] = encryptBlockCBC(inbuffer[nI]); } } /** * encrypts a long buffer to itself * @param buffer buffer to encrypt */ public void encrypt(long[] buffer) { int nLen = buffer.length; for (int nI = 0; nI < nLen; nI++) { buffer[nI] = encryptBlockCBC(buffer[nI]); } } /** * decrypts a byte buffer (should be aligned to an 8 byte border) * to another buffer (of the same size or bigger) * @param inbuffer buffer with ciphertext data * @param outbuffer buffer to get the plaintext data */ public void decrypt(byte[] inbuffer, byte[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // decrypt a temporary 64bit block lTemp = byteArrayToLong(inbuffer, nI); lTemp = decryptBlockCBC(lTemp); longToByteArray(lTemp, outbuffer, nI); } } /** * decrypts a byte buffer (should be aligned to an 8 byte border) to itself * @param buffer buffer to decrypt */ public void decrypt(byte[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=8) { // decrypt over a temporary 64bit block lTemp = byteArrayToLong(buffer, nI); lTemp = decryptBlockCBC(lTemp); longToByteArray(lTemp, buffer, nI); } } /** * decrypts an integer buffer (should be aligned to an * two integer border) to another int buffer (of the same size or bigger) * @param inbuffer buffer with ciphertext data * @param outbuffer buffer to get the plaintext data */ public void decrypt(int[] inbuffer, int[] outbuffer) { int nLen = inbuffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // decrypt a temporary 64bit block lTemp = intArrayToLong(inbuffer, nI); lTemp = decryptBlockCBC(lTemp); longToIntArray(lTemp, outbuffer, nI); } } /** * decrypts an int buffer (should be aligned to a * two integer border) * @param buffer buffer to decrypt */ public void decrypt(int[] buffer) { int nLen = buffer.length; long lTemp; for (int nI = 0; nI < nLen; nI +=2) { // decrypt a temporary 64bit block lTemp = intArrayToLong(buffer, nI); lTemp = decryptBlockCBC(lTemp); longToIntArray(lTemp, buffer, nI); } } /** * decrypts a long buffer to another long buffer (of the same size or bigger) * @param inbuffer buffer with ciphertext data * @param outbuffer buffer to get the plaintext data */ public void decrypt(long[] inbuffer, long[] outbuffer) { int nLen = inbuffer.length; for (int nI = 0; nI < nLen; nI++) { outbuffer[nI] = decryptBlockCBC(inbuffer[nI]); } } /** * decrypts a long buffer to itself * @param buffer buffer to decrypt */ public void decrypt(long[] buffer) { int nLen = buffer.length; for (int nI = 0; nI < nLen; nI++) { buffer[nI] = decryptBlockCBC(buffer[nI]); } } } /** * gets bytes from an array into a long * @param buffer where to get the bytes * @param nStartIndex index from where to read the data * @return the 64bit integer */ private static long byteArrayToLong(byte[] buffer, int nStartIndex) { return (((long)buffer[nStartIndex]) << 56) | (((long)buffer[nStartIndex + 1] & 0x0ffL) << 48) | (((long)buffer[nStartIndex + 2] & 0x0ffL) << 40) | (((long)buffer[nStartIndex + 3] & 0x0ffL) << 32) | (((long)buffer[nStartIndex + 4] & 0x0ffL) << 24) | (((long)buffer[nStartIndex + 5] & 0x0ffL) << 16) | (((long)buffer[nStartIndex + 6] & 0x0ffL) << 8) | ((long)buffer[nStartIndex + 7] & 0x0ff); } /** * converts a long o bytes which are put into a given array * @param lValue the 64bit integer to convert * @param buffer the target buffer * @param nStartIndex where to place the bytes in the buffer */ private static void longToByteArray(long lValue, byte[] buffer, int nStartIndex) { buffer[nStartIndex] = (byte) (lValue >>> 56); buffer[nStartIndex + 1] = (byte) ((lValue >>> 48) & 0x0ff); buffer[nStartIndex + 2] = (byte) ((lValue >>> 40) & 0x0ff); buffer[nStartIndex + 3] = (byte) ((lValue >>> 32) & 0x0ff); buffer[nStartIndex + 4] = (byte) ((lValue >>> 24) & 0x0ff); buffer[nStartIndex + 5] = (byte) ((lValue >>> 16) & 0x0ff); buffer[nStartIndex + 6] = (byte) ((lValue >>> 8) & 0x0ff); buffer[nStartIndex + 7] = (byte) lValue; } /** * converts values from an integer array to a long * @param buffer where to get the bytes * @param nStartIndex index from where to read the data * @return the 64bit integer */ private static long intArrayToLong(int[] buffer, int nStartIndex) { return (((long) buffer[nStartIndex]) << 32) | (((long) buffer[nStartIndex + 1]) & 0x0ffffffffL); } /** * converts a long to integers which are put into a given array * @param lValue the 64bit integer to convert * @param buffer the target buffer * @param nStartIndex where to place the bytes in the buffer */ private static void longToIntArray(long lValue, int[] buffer, int nStartIndex) { buffer[nStartIndex] = (int) (lValue >>> 32); buffer[nStartIndex + 1] = (int) lValue; } /** * makes a long from two integers (treated unsigned) * @param nLo lower 32bits * @param nHi higher 32bits * @return the built long */ private static long makeLong(int nLo, int nHi) { return (((long)nHi << 32) | ((long)nLo & 0x00000000ffffffffL)); } /** * gets the lower 32 bits of a long * @param lVal the long integer * @return lower 32 bits */ private static int longLo32(long lVal) { return (int)lVal; } /** * gets the higher 32 bits of a long * @param lVal the long integer * @return higher 32 bits */ private static int longHi32(long lVal) { return (int)((lVal >>> 32)); } // our table for binhex conversion final static char[] HEXTAB = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" }; /** * converts a byte array to a binhex string * @param data the byte array * @param nStartPos start index where to get the bytes * @param nNumOfBytes number of bytes to convert * @return the binhex string */ private static String bytesToBinHex(byte[] data, int nStartPos, int nNumOfBytes) { StringBuilder sbuf = new StringBuilder(); sbuf.setLength(nNumOfBytes << 1); int nPos = 0; for (int nI = 0; nI < nNumOfBytes; nI++) { sbuf.setCharAt(nPos++, HEXTAB[(data[nI + nStartPos] >> 4) & 0x0f]); sbuf.setCharAt(nPos++, HEXTAB[data[nI + nStartPos] & 0x0f]); } return sbuf.toString(); } /** * converts a binhex string back into a byte array (invalid codes will be skipped) * @param sBinHex binhex string * @param data the target array * @param nSrcPos from which character in the string the conversion should begin, * remember that (nSrcPos modulo 2) should equals 0 normally * @param nDstPos to store the bytes from which position in the array * @param nNumOfBytes number of bytes to extract * @return number of extracted bytes */ private static int binHexToBytes(String sBinHex, byte[] data, int nSrcPos, int nDstPos, int nNumOfBytes) { // check for correct ranges int nStrLen = sBinHex.length(); int nAvailBytes = (nStrLen - nSrcPos) >> 1; if (nAvailBytes < nNumOfBytes) { nNumOfBytes = nAvailBytes; } int nOutputCapacity = data.length - nDstPos; if (nNumOfBytes > nOutputCapacity) { nNumOfBytes = nOutputCapacity; } // convert now int nResult = 0; for (int nI = 0; nI < nNumOfBytes; nI++) { byte bActByte = 0; boolean blConvertOK = true; for (int nJ = 0; nJ < 2; nJ++) { bActByte <<= 4; char cActChar = sBinHex.charAt(nSrcPos++); if ((cActChar >= "a") && (cActChar <= "f")) { bActByte |= (byte)(cActChar - "a") + 10; } else { if ((cActChar >= "0") && (cActChar <= "9")) { bActByte |= (byte)(cActChar - "0"); } else { blConvertOK = false; } } } if (blConvertOK) { data[nDstPos++] = bActByte; nResult++; } } return nResult; } /** * converts a byte array into an UNICODE string * @param data the byte array * @param nStartPos where to begin the conversion * @param nNumOfBytes number of bytes to handle * @return the string */ private static String byteArrayToUNCString(byte[] data, int nStartPos, int nNumOfBytes) { // we need two bytes for every character nNumOfBytes &= ~1; // enough bytes in the buffer? int nAvailCapacity = data.length - nStartPos; if (nAvailCapacity < nNumOfBytes) { nNumOfBytes = nAvailCapacity; } StringBuilder sbuf = new StringBuilder(); sbuf.setLength(nNumOfBytes >> 1); int nSBufPos = 0; while (nNumOfBytes > 0) { sbuf.setCharAt(nSBufPos++, (char)(((int)data[nStartPos] << 8) | ((int)data[nStartPos + 1] & 0x0ff))); nStartPos += 2; nNumOfBytes -= 2; } return sbuf.toString(); } } </source>

Encrypt a password

   <source lang="java">

public class Main { 

 public static void main(String arg[]) throws Exception {
   System.out.println(encrypt("String"));
 }
 public static byte[] encrypt(String x) throws Exception {
   java.security.MessageDigest d = null;
   d = java.security.MessageDigest.getInstance("SHA-1");
   d.reset();
   d.update(x.getBytes());
   return d.digest();
 }

} 


 </source>



Encryption and Decryption using Symmetric Keys

   <source lang="java">

import java.security.InvalidKeyException; import java.security.Key; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; public class Main { 

 static String algorithm = "DESede";
 static Key key = KeyGenerator.getInstance(algorithm).generateKey();
 static Cipher cipher = Cipher.getInstance(algorithm);
 public static void main(String[] args) throws Exception {
   byte[] encryptionBytes = encrypt("input");
   System.out.println("Recovered: " + decrypt(encryptionBytes));
 }
 private static byte[] encrypt(String input) throws InvalidKeyException, BadPaddingException,
     IllegalBlockSizeException {
   cipher.init(Cipher.ENCRYPT_MODE, key);
   byte[] inputBytes = input.getBytes();
   return cipher.doFinal(inputBytes);
 }
 private static String decrypt(byte[] encryptionBytes) throws InvalidKeyException,
     BadPaddingException, IllegalBlockSizeException {
   cipher.init(Cipher.DECRYPT_MODE, key);
   byte[] recoveredBytes = cipher.doFinal(encryptionBytes);
   String recovered = new String(recoveredBytes);
   return recovered;
 }

} 


 </source>



Encryption and decryption with AES/ECB/PKCS7Padding

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());    
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
       0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 };
   SecretKeySpec key = new SecretKeySpec(keyBytes, "AES");
   Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
   System.out.println(new String(input));
   // encryption pass
   cipher.init(Cipher.ENCRYPT_MODE, key);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
   int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
   ctLength += cipher.doFinal(cipherText, ctLength);
   System.out.println(new String(cipherText));
   System.out.println(ctLength);
   // decryption pass
   cipher.init(Cipher.DECRYPT_MODE, key);
   byte[] plainText = new byte[cipher.getOutputSize(ctLength)];
   int ptLength = cipher.update(cipherText, 0, ctLength, plainText, 0);
   ptLength += cipher.doFinal(plainText, ptLength);
   System.out.println(new String(plainText));
   System.out.println(ptLength);
 }

} 


 </source>



Example of using PBE with a PBEParameterSpec

   <source lang="java">

import java.security.Key; import java.security.Security; import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.PBEParameterSpec; import javax.crypto.spec.SecretKeySpec; /** 

* Example of using PBE with a PBEParameterSpec
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());        
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72,
       0x06, 0x75, 0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03,
       (byte) 0xdd, (byte) 0xd9, 0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
   byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6,
       0x08, (byte) 0xb8 };
   // encrypt the data using precalculated keys
   Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");
   cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(
       ivBytes));
   byte[] out = cEnc.doFinal(input);
   // decrypt the data using PBE
   char[] password = "password".toCharArray();
   byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
   int iterationCount = 2048;
   PBEKeySpec pbeSpec = new PBEKeySpec(password);
   SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
   Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
   Key sKey = keyFact.generateSecret(pbeSpec);
   cDec.init(Cipher.DECRYPT_MODE, sKey, new PBEParameterSpec(salt, iterationCount));
   System.out.println("cipher : " + new String(out));
   System.out.println("gen key: " + new String(sKey.getEncoded()));
   System.out.println("gen iv : " + new String(cDec.getIV()));
   System.out.println("plain  : " + new String(cDec.doFinal(out)));
 }

} 


 </source>



Example of using PBE without using a PBEParameterSpec

   <source lang="java">

import java.security.Key; import java.security.Security; import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.SecretKeySpec; /** 

* Example of using PBE without using a PBEParameterSpec
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
   byte[] input = "www.jexp.ru".getBytes();
   byte[] keyBytes = new byte[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72,
       0x06, 0x75, 0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03,
       (byte) 0xdd, (byte) 0xd9, 0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
   byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6,
       0x08, (byte) 0xb8 };
   // encrypt the data using precalculated keys
   Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");
   cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(
       ivBytes));
   byte[] out = cEnc.doFinal(input);
   // decrypt the data using PBE
   char[] password = "password".toCharArray();
   byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
   int iterationCount = 2048;
   PBEKeySpec pbeSpec = new PBEKeySpec(password, salt, iterationCount);
   SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES");
   Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES");
   Key sKey = keyFact.generateSecret(pbeSpec);
   cDec.init(Cipher.DECRYPT_MODE, sKey);
   System.out.println("cipher : " + new String(out));
   System.out.println("gen key: " + new String(sKey.getEncoded()));
   System.out.println("gen iv : " + new String(cDec.getIV()));
   System.out.println("plain  : " + new String(cDec.doFinal(out)));
 }

} 


 </source>



Get Cipher Instance Blowfish

   <source lang="java">

import java.security.Security; import javax.crypto.Cipher; public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());    
   
   Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");
   System.out.println(cipher.getProvider());
   cipher = Cipher.getInstance("Blowfish/ECB/NoPadding", "BC");
   System.out.println(cipher.getProvider());
 }

} 


 </source>



Get the formats of the encoded bytes

   <source lang="java">

import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.PrivateKey; import java.security.PublicKey; public class Main { 

 public static void main(String[] argv) throws Exception {
   String algorithm = "DSA"; // or RSA, DH, etc.
   // Generate a 1024-bit Digital Signature Algorithm (DSA) key pair
   KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algorithm);
   keyGen.initialize(1024);
   KeyPair keypair = keyGen.genKeyPair();
   PrivateKey privateKey = keypair.getPrivate();
   PublicKey publicKey = keypair.getPublic();
   String format = privateKey.getFormat(); // PKCS#8
   format = publicKey.getFormat(); // X.509
 }

} 


 </source>



Getting the Bytes of a Generated Symmetric Key

   <source lang="java">

import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; public class Main { 

 public static void main(String[] argv) throws Exception {
   // Generate a key
   KeyGenerator keyGen = KeyGenerator.getInstance("DESede");
   SecretKey key = keyGen.generateKey();
   // Get the bytes of the key
   byte[] keyBytes = key.getEncoded();
   int numBytes = keyBytes.length;
   // The bytes can be converted back to a SecretKey
   SecretKey key2 = new SecretKeySpec(keyBytes, "DESede");
   boolean b = key.equals(key2); // true
 }

} 


 </source>



Message without tampering with MAC (DES), encryption AES in CTR mode

   <source lang="java">

import java.security.Key; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.SecureRandom; import java.security.Security; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.Mac; import javax.crypto.SecretKey; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import org.bouncycastle.jce.provider.BouncyCastleProvider; /** 

* Message without tampering with MAC (DES), encryption AES in CTR mode
*/

public class MainClass { 

 public static void main(String[] args) throws Exception {
   Security.addProvider(new BouncyCastleProvider());        
   SecureRandom random = new SecureRandom();
   IvParameterSpec ivSpec = createCtrIvForAES(1, random);
   Key key = createKeyForAES(256, random);
   Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding", "BC");
   String input = "www.jexp.ru";
   Mac mac = Mac.getInstance("DES", "BC");
   byte[] macKeyBytes = "12345678".getBytes();
   Key macKey = new SecretKeySpec(macKeyBytes, "DES");
   System.out.println("input : " + input);
   // encryption step
   cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
   byte[] cipherText = new byte[cipher.getOutputSize(input.length() + mac.getMacLength())];
   int ctLength = cipher.update(input.getBytes(), 0, input.length(), cipherText, 0);
   mac.init(macKey);
   mac.update(input.getBytes());
   ctLength += cipher.doFinal(mac.doFinal(), 0, mac.getMacLength(), cipherText, ctLength);
   System.out.println("cipherText : " + new String(cipherText));
   
   // decryption step
   cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
   byte[] plainText = cipher.doFinal(cipherText, 0, ctLength);
   int messageLength = plainText.length - mac.getMacLength();
   mac.init(macKey);
   mac.update(plainText, 0, messageLength);
   byte[] messageHash = new byte[mac.getMacLength()];
   System.arraycopy(plainText, messageLength, messageHash, 0, messageHash.length);
   System.out.println("plain : " + new String(plainText) + " verified: "
       + MessageDigest.isEqual(mac.doFinal(), messageHash));
 }
 static SecretKey createKeyForAES(int bitLength, SecureRandom random)
     throws NoSuchAlgorithmException, NoSuchProviderException {
   KeyGenerator generator = KeyGenerator.getInstance("AES", "BC");
   generator.init(256, random);
   return generator.generateKey();
 }
 public static IvParameterSpec createCtrIvForAES(int messageNumber, SecureRandom random) {
   byte[] ivBytes = new byte[16];
   random.nextBytes(ivBytes);
   ivBytes[0] = (byte) (messageNumber >> 24);
   ivBytes[1] = (byte) (messageNumber >> 16);
   ivBytes[2] = (byte) (messageNumber >> 8);
   ivBytes[3] = (byte) (messageNumber >> 0);
   for (int i = 0; i != 7; i++) {
     ivBytes[8 + i] = 0;
   }
   ivBytes[15] = 1;
   return new IvParameterSpec(ivBytes);
 }

} 


 </source>

Источник — «http://jexp.ru/index.php?title=Java/Security/Encryption&oldid=7635»