Maven依賴

<dependency><groupId>org.bouncycastle</groupId><artifactId>bcprov-jdk15on</artifactId><version>1.56</version> </dependency>

SM3Utils

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;public class SM3Utils {private static final String ENCODING = "UTF-8";static {Security.addProvider(new BouncyCastleProvider());}/*** sm3算法加密* @explain* @param paramStr 待加密字符串* @return 返回加密后，固定長度=32的16進制字符串*/public static String encrypt(String paramStr){// 將返回的hash值轉換成16進制字符串String resultHexString = "";try {// 將字符串轉換成byte數組byte[] srcData = paramStr.getBytes(ENCODING);// 調用hash()byte[] resultHash = hash(srcData);// 將返回的hash值轉換成16進制字符串resultHexString = ByteUtils.toHexString(resultHash);} catch (UnsupportedEncodingException e) {e.printStackTrace();}return resultHexString;}/*** 返回長度=32的byte數組* @explain 生成對應的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;}/*** sm3算法加密* @explain* @param paramStr 待加密字符串* @param key 密鑰* @return 返回加密后，固定長度=32的16進制字符串*/public static String encryptPlus(String paramStr,String key){// 將返回的hash值轉換成16進制字符串String resultHexString = "";try {// 將字符串轉換成byte數組byte[] srcData = paramStr.getBytes(ENCODING);// 調用hash()byte[] resultHash = hmac(srcData,key.getBytes(ENCODING));// 將返回的hash值轉換成16進制字符串resultHexString = ByteUtils.toHexString(resultHash);} catch (UnsupportedEncodingException e) {e.printStackTrace();}return resultHexString;}/*** 通過密鑰進行加密* @explain 指定密鑰進行加密* @param key 密鑰* @param srcData 被加密的byte數組* @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;}/*** 判斷源數據與加密數據是否一致* @explain 通過驗證原數組和生成的hash數組是否為同一數組，驗證2者是否為同一數據* @param srcStr 原字符串* @param sm3HexString 16進制字符串* @return 校驗結果*/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;}public static void main(String[] args) {String str = "{\"test\":\"001\"}";//秘鑰String key = "key";String hex = SM3Utils.encryptPlus(str,key);System.out.println("參數:" + str);System.out.println("密文:" + hex);}}

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