java sm3加密算法
1.准备工作
所需jar包:
bcprov-jdk15on-1.59.jar
commons-lang3-3.1.jar
20200901
对应的maven依赖
<!--sm3,sm4加密算法--> <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcprov-jdk15on</artifactId> <version>1.66</version> </dependency>
import org.bouncycastle.crypto.digests.SM3Digest; import org.bouncycastle.crypto.macs.HMac; import org.bouncycastle.crypto.params.KeyParameter; import org.bouncycastle.jce.provider.BouncyCastleProvider; import org.bouncycastle.pqc.math.linearalgebra.ByteUtils; import java.io.UnsupportedEncodingException; import java.security.Security; import java.util.Arrays;
/** * sm3加密算法工具类 * @explain 加密与加密结果验证(不可逆算法) * @author Marydon * @creationTime 2018年7月5日上午10:01:24 * @version 1.0 * @since * @email marydon20170307@163.com */ public class Sm3Utils { private static final String ENCODING = "UTF-8"; static { Security.addProvider(new BouncyCastleProvider()); } }
2.SM3加密
方式一:不提供密钥
/** * sm3算法加密 * @explain * @param paramStr * 待加密字符串 * @return 返回加密后,固定长度=32的16进制字符串 */ public static String encrypt(String paramStr){ // 将返回的hash值转换成16进制字符串 String resultHexString = ""; try { // 将字符串转换成byte数组 byte[] srcData = paramStr.getBytes(ENCODING); // 调用hash() byte[] resultHash = hash(srcData); // 将返回的hash值转换成16进制字符串 resultHexString = ByteUtils.toHexString(resultHash); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return resultHexString; } /** * 返回长度=32的byte数组 * @explain 生成对应的hash值 * @param srcData * @return */ public static byte[] hash(byte[] srcData) { SM3Digest digest = new SM3Digest(); digest.update(srcData, 0, srcData.length); byte[] hash = new byte[digest.getDigestSize()]; digest.doFinal(hash, 0); return hash; }
方式二:自定义密钥
/** * 通过密钥进行加密 * @explain 指定密钥进行加密 * @param key * 密钥 * @param srcData * 被加密的byte数组 * @return */ public static byte[] hmac(byte[] key, byte[] srcData) { KeyParameter keyParameter = new KeyParameter(key); SM3Digest digest = new SM3Digest(); HMac mac = new HMac(digest); mac.init(keyParameter); mac.update(srcData, 0, srcData.length); byte[] result = new byte[mac.getMacSize()]; mac.doFinal(result, 0); return result; }
3.加密数据校验
/** * 判断源数据与加密数据是否一致 * @explain 通过验证原数组和生成的hash数组是否为同一数组,验证2者是否为同一数据 * @param srcStr * 原字符串 * @param sm3HexString * 16进制字符串 * @return 校验结果 */ public static boolean verify(String srcStr, String sm3HexString) { boolean flag = false; try { byte[] srcData = srcStr.getBytes(ENCODING); byte[] sm3Hash = ByteUtils.fromHexString(sm3HexString); byte[] newHash = hash(srcData); if (Arrays.equals(newHash, sm3Hash)) flag = true; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return flag; }
4.测试
public static void main(String[] args) { // 测试二:json String json = "{\"name\":\"Marydon\",\"website\":\"http://www.cnblogs.com/Marydon20170307\"}"; String hex = Sm3Utils.encrypt(json); System.out.println(hex);// 0b0880f6f2ccd817809a432420e42b66d3772dc18d80789049d0f9654efeae5c // 验证加密后的16进制字符串与加密前的字符串是否相同 boolean flag = Sm3Utils.verify(json, hex); System.out.println(flag);// true }
本文来自博客园,作者:Marydon,转载请注明原文链接:https://www.cnblogs.com/Marydon20170307/p/9303233.html