最近单位要对接浙江省智慧医保，2022年2月15日要上线，时间紧。

接口调用时，要在Header加入签名健值，其中签名算法是：国密SM3算法，所以笔记一下。

　　　　　/// <summary>
        /// C#.net,SM3算法(使用自定义Hex密钥)
        /// </summary>
        /// <param name="data"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string ToSM3HexStr(string data, string key)
        {
            byte[] msg1 = Encoding.UTF8.GetBytes(data);
            byte[] key1 = Encoding.UTF8.GetBytes(key);

            Org.BouncyCastle.Crypto.Parameters.KeyParameter keyParameter = new Org.BouncyCastle.Crypto.Parameters.KeyParameter(key1);
            Org.BouncyCastle.Crypto.Digests.SM3Digest sm3 = new Org.BouncyCastle.Crypto.Digests.SM3Digest();

            Org.BouncyCastle.Crypto.Macs.HMac mac = new Org.BouncyCastle.Crypto.Macs.HMac(sm3);//带密钥的杂凑算法
            mac.Init(keyParameter);
            mac.BlockUpdate(msg1, 0, msg1.Length);
            byte[] result = new byte[mac.GetMacSize()];

            mac.DoFinal(result, 0);
            return new UTF8Encoding().GetString(Org.BouncyCastle.Utilities.Encoders.Hex.Encode(result));
        }

java国密SM3算法:

    private final static String SECRET = "密匙XXXX";

    public static String encrytSHA256(String content, String secret) {

        try {
            Security.addProvider(new BouncyCastleProvider());
            SecretKey secretKey = new SecretKeySpec(secret.getBytes("UTF-8"), "HmacSm3");
            Mac mac = Mac.getInstance(secretKey.getAlgorithm());
            mac.init(secretKey);
            byte[] digest = mac.doFinal(content.getBytes("UTF-8"));
            return new HexBinaryAdapter().marshal(digest).toUpperCase();
        } catch (Exception e) {
            throw new RuntimeCryptoException("加密异常");
        }

    }