import javax.crypto.spec.DESKeySpec;
import java.security.NoSuchAlgorithmException;
import java.security.InvalidKeyException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
/**
* 閫氳繃DES鍔犲瘑瑙ｅ瘑瀹炵幇涓涓猄tring瀛楃涓茬殑鍔犲瘑鍜岃В瀵?
*
* @author badpeas
*
*/
public class EncryptDecryptData {
public static void main(String[] args) throws NoSuchAlgorithmException,
InvalidKeyException, NoSuchPaddingException,
InvalidKeySpecException, IllegalBlockSizeException,
BadPaddingException {
// 1.1 >>> 棣栧厛瑕佸垱寤轟竴涓瘑鍖?br /> // DES綆楁硶瑕佹眰鏈変竴涓彲淇′換鐨勯殢鏈烘暟婧?br /> SecureRandom sr = new SecureRandom();
// 涓烘垜浠夋嫨鐨凞ES綆楁硶鐢熸垚涓涓狵eyGenerator瀵硅薄
KeyGenerator kg = KeyGenerator.getInstance("DES");
kg.init(sr);
// 鐢熸垚瀵嗗寵
SecretKey key = kg.generateKey();
// 鑾峰彇瀵嗗寵鏁版嵁
byte rawKeyData[] = key.getEncoded();
System.out.println("瀵嗗寵===>" + rawKeyData);
String str = "hi.baidu.com/badpeas"; // 寰呭姞瀵嗘暟鎹?br /> // 2.1 >>> 璋冪敤鍔犲瘑鏂規硶
byte[] encryptedData = encrypt(rawKeyData, str);
// 3.1 >>> 璋冪敤瑙ｅ瘑鏂規硶
decrypt(rawKeyData, encryptedData);
}
/**
* 鍔犲瘑鏂規硶
*
* @param rawKeyData
* @param str
* @return
* @throws InvalidKeyException
* @throws NoSuchAlgorithmException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
* @throws NoSuchPaddingException
* @throws InvalidKeySpecException
*/
public static byte[] encrypt(byte rawKeyData[], String str)
throws InvalidKeyException, NoSuchAlgorithmException,
IllegalBlockSizeException, BadPaddingException,
NoSuchPaddingException, InvalidKeySpecException {
// DES綆楁硶瑕佹眰鏈変竴涓彲淇′換鐨勯殢鏈烘暟婧?br /> SecureRandom sr = new SecureRandom();
// 浠庡師濮嬪瘑鍖欐暟鎹垱寤轟竴涓狣ESKeySpec瀵硅薄
DESKeySpec dks = new DESKeySpec(rawKeyData);
// 鍒涘緩涓涓瘑鍖欏伐鍘傦紝鐒跺悗鐢ㄥ畠鎶奃ESKeySpec杞崲鎴愪竴涓猄ecretKey瀵硅薄
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey key = keyFactory.generateSecret(dks);
// Cipher瀵硅薄瀹為檯瀹屾垚鍔犲瘑鎿嶄綔
Cipher cipher = Cipher.getInstance("DES");
// 鐢ㄥ瘑鍖欏垵濮嬪寲Cipher瀵硅薄
cipher.init(Cipher.ENCRYPT_MODE, key, sr);
// 鐜板湪錛岃幏鍙栨暟鎹茍鍔犲瘑
byte data[] = str.getBytes();
// 姝ｅ紡鎵ц鍔犲瘑鎿嶄綔
byte[] encryptedData = cipher.doFinal(data);
System.out.println("鍔犲瘑鍚?==>" + encryptedData);
return encryptedData;
}
/**
* 瑙ｅ瘑鏂規硶
*
* @param rawKeyData
* @param encryptedData
* @throws IllegalBlockSizeException
* @throws BadPaddingException
* @throws InvalidKeyException
* @throws NoSuchAlgorithmException
* @throws NoSuchPaddingException
* @throws InvalidKeySpecException
*/
public static String decrypt(byte rawKeyData[], byte[] encryptedData)
throws IllegalBlockSizeException, BadPaddingException,
InvalidKeyException, NoSuchAlgorithmException,
NoSuchPaddingException, InvalidKeySpecException {
// DES綆楁硶瑕佹眰鏈変竴涓彲淇′換鐨勯殢鏈烘暟婧?br /> SecureRandom sr = new SecureRandom();
// 浠庡師濮嬪瘑鍖欐暟鎹垱寤轟竴涓狣ESKeySpec瀵硅薄
DESKeySpec dks = new DESKeySpec(rawKeyData);
// 鍒涘緩涓涓瘑鍖欏伐鍘傦紝鐒跺悗鐢ㄥ畠鎶奃ESKeySpec瀵硅薄杞崲鎴愪竴涓猄ecretKey瀵硅薄
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey key = keyFactory.generateSecret(dks);
// Cipher瀵硅薄瀹為檯瀹屾垚瑙ｅ瘑鎿嶄綔
Cipher cipher = Cipher.getInstance("DES");
// 鐢ㄥ瘑鍖欏垵濮嬪寲Cipher瀵硅薄
cipher.init(Cipher.DECRYPT_MODE, key, sr);
// 姝ｅ紡鎵ц瑙ｅ瘑鎿嶄綔
byte decryptedData[] = cipher.doFinal(encryptedData);
System.out.println("瑙ｅ瘑鍚?==>" + new String(decryptedData));
return new String(decryptedData);
}
}
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鍦ㄥ姞瀵嗕箣鍓?nbsp; byte rawKeyData[] = "429387498234".getBytes();
榪欐牱瑙ｅ瘑鏂規硶閲岄潰涔熷啓姝?nbsp; byte rawKeyData[] = "429387498234".getBytes();
璋冪敤瑙ｅ瘑鏂規硶灝辯洿鎺? decrypt(encryptedData); 灝卞彲浠ヤ簡!
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