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• Symmetry.java

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com.github.fartherp.framework.security.symmetry.Symmetry Maven / Gradle / Ivy

/*
 * Copyright (c) 2017. CK. All rights reserved.
 */

package com.github.fartherp.framework.security.symmetry;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.spec.AlgorithmParameterSpec;

/**
 * Created by IntelliJ IDEA.
 *
 * @author: CK
 * @date: 2017/11/30
 */
public class Symmetry {

    /**
     * 生成密钥
     * @param key 密钥
     * @param algorithm 算法
     * @return key
     */
    public static Key generateRandomKey(byte[] key, String algorithm) {
        return new SecretKeySpec(key, algorithm);
    }

    /**
     * 加密
     * @param algorithm 算法
     * @param key 加密密钥
     * @param data 需要加密数据[数组]
     * @return 加密数据[数组]
     */
    public static byte[] encrypt(String algorithm, Key key, byte[] data) {
        try {
            Cipher cipher = Cipher.getInstance(algorithm);
            // 传入加密标识与加密密钥
            cipher.init(Cipher.ENCRYPT_MODE, key);
            // 加密数据
            return cipher.doFinal(data);
        } catch (NoSuchPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]无此填充", e);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("[" + algorithm + "]无此算法", e);
        } catch (InvalidKeyException e) {
            throw new RuntimeException("[" + algorithm + "]无效密钥错误", e);
        }catch (IllegalBlockSizeException e) {
            throw new RuntimeException("[" + algorithm + "] (data length error)", e);
        } catch (BadPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]填充错误", e);
        }
    }

    /**
     * 加密
     * @param algorithm 算法
     * @param key 加密密钥
     * @param data 需要加密数据[数组]
     * @return 加密数据[数组]
     */
    public static byte[] encrypt(String algorithm, Key key, byte[] data, AlgorithmParameterSpec algorithmParameterSpec) {
        try {
            Cipher cipher = Cipher.getInstance(algorithm);
            // 传入加密标识与加密密钥
            cipher.init(Cipher.ENCRYPT_MODE, key, algorithmParameterSpec);
            // 加密数据
            return cipher.doFinal(data);
        } catch (NoSuchPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]无此填充", e);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("[" + algorithm + "]无此算法", e);
        } catch (InvalidKeyException e) {
            throw new RuntimeException("[" + algorithm + "]无效密钥错误", e);
        } catch (InvalidAlgorithmParameterException e) {
            throw new RuntimeException("[" + algorithm + "]无效算法参数错误", e);
        } catch (IllegalBlockSizeException e) {
            throw new RuntimeException("[" + algorithm + "] (data length error)", e);
        } catch (BadPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]填充错误", e);
        }
    }

    /**
     * 解密
     * @param algorithm 算法
     * @param key 解密密钥
     * @param data 需要解密数据[数组]
     * @return 解密数据[数组]
     */
    public static byte[] decrypt(String algorithm, Key key, byte[] data) {
        try {
            Cipher cipher = Cipher.getInstance(algorithm);
            // 传入解密标识与解密密钥
            cipher.init(Cipher.DECRYPT_MODE, key);
            return cipher.doFinal(data);// 解密数据
        } catch (NoSuchPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]无此填充", e);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("[" + algorithm + "]无此算法", e);
        } catch (InvalidKeyException e) {
            throw new RuntimeException("[" + algorithm + "]无效密钥错误", e);
        } catch (IllegalBlockSizeException e) {
            throw new RuntimeException("[" + algorithm + "] (data length error)", e);
        } catch (BadPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]填充错误", e);
        }
    }

    /**
     * 解密
     * @param data 需要解密数据[数组]
     * @param key 解密密钥
     * @return 解密数据[数组]
     */
    public static byte[] decrypt(String algorithm, Key key, byte[] data, AlgorithmParameterSpec algorithmParameterSpec) {
        try {
            Cipher cipher = Cipher.getInstance(algorithm);
            // 传入解密标识与解密密钥
            cipher.init(Cipher.DECRYPT_MODE, key, algorithmParameterSpec);
            return cipher.doFinal(data);// 解密数据
        } catch (NoSuchPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]无此填充", e);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("[" + algorithm + "]无此算法", e);
        } catch (InvalidKeyException e) {
            throw new RuntimeException("[" + algorithm + "]无效密钥错误", e);
        } catch (InvalidAlgorithmParameterException e) {
            throw new RuntimeException("[" + algorithm + "]无效算法参数错误", e);
        } catch (IllegalBlockSizeException e) {
            throw new RuntimeException("[" + algorithm + "] (data length error)", e);
        } catch (BadPaddingException e) {
            throw new RuntimeException("[" + algorithm + "]填充错误", e);
        }
    }
}