package com.hxzk.util;
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import org.bouncycastle.crypto.RuntimeCryptoException;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import javax.crypto.Mac;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.SecretKeySpec;
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import java.io.IOException;
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import java.security.Security;
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import java.text.ParseException;
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import java.util.Base64;
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public class HmacSHA256 {
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/**
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* @param content 加密内容
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* @param secret 加密key
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* 使用 HMAC-SHA256 以 secret为密钥（字符串形式，非原始二进制），以 content为消息，计算消息摘要，再进行base64编码处理，得到 signature
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* @return
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*/
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public static String encrytSHA256(String content, String secret) {
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try {
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Security.addProvider(new BouncyCastleProvider());
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SecretKey secretKey = new SecretKeySpec(secret.getBytes("UTF8"), "HmacSHA256");
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Mac mac = Mac.getInstance(secretKey.getAlgorithm());
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mac.init(secretKey);
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byte[] digest = mac.doFinal(content.getBytes("UTF-8"));
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//return new HexBinaryAdapter().marshal(digest).toLowerCase();
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// .toLowerCase()小写
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// .toUpperCase();大写
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//加密后用base64再加密
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String signature = Base64.getEncoder().encodeToString(digest);
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} catch (Exception e) {
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throw new RuntimeCryptoException("加密异常");
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}
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return content;
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}
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public static void main(String[] args) throws ParseException, IOException {
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System.out.println(encrytSHA256("加密内容", "key"));
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}
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}
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