【烦人的加密算法】3DES 加密的使用--Java版本

痛定思痛。 2022-09-10 06:27 123阅读 0赞

import lombok.extern.slf4j.Slf4j;
    import org.apache.commons.lang3.StringUtils;
    
    import javax.crypto.Cipher;
    import javax.crypto.SecretKeyFactory;
    import javax.crypto.spec.DESedeKeySpec;
    import javax.crypto.spec.IvParameterSpec;
    import java.nio.charset.StandardCharsets;
    import java.security.Key;
    import java.util.Base64;
    
    /** * 3DES加密 * * @author hcf * @date 2021/9/1 20:56 */
    @Slf4j
    public class DES3Utils { 
    
        /** * 向量 */
        private final static String IV = "01234567";
    
        private static final String ALGORITHM = "DESede";
    
        private static final String ALGORITHM_NAME = "DESede/CBC/PKCS5Padding";
    
        /** * 加密 * * @param hexKey 密钥 * @param content 内容 * @return 密文 */
        public static String encrypt(String hexKey, String content) { 
            String encryptContent = StringUtils.EMPTY;
            try { 
                DESedeKeySpec spec = new DESedeKeySpec(hexKey.getBytes());
                SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
                Key key = keyFactory.generateSecret(spec);
    
                Cipher cipher = Cipher.getInstance(ALGORITHM_NAME);
                IvParameterSpec ips = new IvParameterSpec(IV.getBytes());
                cipher.init(Cipher.ENCRYPT_MODE, key, ips);
                byte[] encryptData = cipher.doFinal(content.getBytes(StandardCharsets.UTF_8));
                encryptContent = Base64.getEncoder().encodeToString(encryptData);
            } catch (Exception e) { 
                log.error(" DES3Utils.encrypt error {}", e.getMessage(), e);
            }
            return encryptContent;
        }
    
        /** * 解密 * * @param hexKey 明文密钥 * @param encryptContent 加密内容 * @return 明文 */
        public static String decrypt(String hexKey, String encryptContent) { 
            String content = StringUtils.EMPTY;
            try { 
                DESedeKeySpec spec = new DESedeKeySpec(hexKey.getBytes());
                SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
                Key key = keyFactory.generateSecret(spec);
    
                Cipher cipher = Cipher.getInstance(ALGORITHM_NAME);
                IvParameterSpec ips = new IvParameterSpec(IV.getBytes());
                cipher.init(Cipher.DECRYPT_MODE, key, ips);
                byte[] decryptData = cipher.doFinal(Base64.getDecoder().decode(encryptContent));
                content = new String(decryptData, StandardCharsets.UTF_8);
            } catch (Exception e) { 
                log.error(" DES3Utils.decrypt error {}", e.getMessage(), e);
            }
            return content;
        }
    
        public static void main(String[] args) { 
            String hexCipher = CipherUtils.randomHexCipher();
            String encrypt = encrypt(hexCipher, "content");
            System.out.println(encrypt);
            System.out.println(decrypt(hexCipher, encrypt));
        }
    }

CipherUtils 参照

[【烦人的加密算法】国密 SM4 的使用–Java版本][SM4 _Java]

[SM4 _Java]: https://blog.csdn.net/qq_27631797/article/details/120126765?spm=1001.2014.3001.5501