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kshitij.so |
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package in.shop2020.util;
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import java.io.UnsupportedEncodingException;
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import java.security.spec.AlgorithmParameterSpec;
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import java.security.spec.KeySpec;
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import javax.crypto.Cipher;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.SecretKey;
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import javax.crypto.SecretKeyFactory;
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import javax.crypto.spec.PBEKeySpec;
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import javax.crypto.spec.PBEParameterSpec;
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import org.apache.commons.codec.binary.Base64;
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import org.apache.log4j.Logger;
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public class DesEncrypter {
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private static Logger logger = Logger.getLogger(DesEncrypter.class);
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Cipher ecipher;
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Cipher dcipher;
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// 8-byte Salt
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byte[] salt = { (byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
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(byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03 };
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// Iteration count
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int iterationCount = 19;
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public DesEncrypter(String passPhrase) {
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try {
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// Create the key
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KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt,
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iterationCount);
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SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES")
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.generateSecret(keySpec);
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ecipher = Cipher.getInstance(key.getAlgorithm());
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dcipher = Cipher.getInstance(key.getAlgorithm());
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// Prepare the parameter to the ciphers
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AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);
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// Create the ciphers
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ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
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dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
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} catch (java.security.InvalidAlgorithmParameterException e) {
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logger.error("Unable to initialize the cipher", e);
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} catch (java.security.spec.InvalidKeySpecException e) {
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logger.error("Unable to initialize the cipher", e);
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} catch (javax.crypto.NoSuchPaddingException e) {
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logger.error("Unable to initialize the cipher", e);
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} catch (java.security.NoSuchAlgorithmException e) {
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logger.error("Unable to initialize the cipher", e);
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} catch (java.security.InvalidKeyException e) {
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logger.error("Unable to initialize the cipher", e);
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}
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}
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public String encrypt(String str) {
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try {
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// Encode the string into bytes using utf-8
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byte[] utf8 = str.getBytes("UTF8");
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// Encrypt
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byte[] enc = ecipher.doFinal(utf8);
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// Encode bytes to base64 to get a string
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return Base64.encodeBase64URLSafeString(enc);
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} catch (javax.crypto.BadPaddingException e) {
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logger.error("Encryption failed because of bad padding", e);
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} catch (IllegalBlockSizeException e) {
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logger.error("Encryption failed because of illegal block size", e);
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} catch (UnsupportedEncodingException e) {
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logger.error("Encryption failed because the underlying encoding is unsupported", e);
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}
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return null;
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}
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public String decrypt(String str) {
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try {
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// Decode base64 encoded string to get bytes
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byte[] dec = Base64.decodeBase64(str);
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// Decrypt
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byte[] utf8 = dcipher.doFinal(dec);
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// Decode using utf-8
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return new String(utf8, "UTF8");
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} catch (javax.crypto.BadPaddingException e) {
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logger.error("Encryption failed because of bad padding", e);
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} catch (IllegalBlockSizeException e) {
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logger.error("Encryption failed because of illegal block size", e);
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} catch (UnsupportedEncodingException e) {
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logger.error("Encryption failed because the underlying encoding is unsupported", e);
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}
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return null;
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}
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public static void main(String[] args){
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DesEncrypter desEncrypter = new DesEncrypter("saholic");
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System.out.println(desEncrypter.encrypt("pud8SQuI6p"));
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}
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}
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