求签名算法HmacSHA256源码

[stevenjin]

用appSecret把timestamp参数计算签名，签名算法为HmacSHA256

其中，timestamp指时间戳

[CRonaldo9399]

https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.hmacsha256?view=netframework-4.7.2

[娃都会打酱油了]

System.Security.Cryptography.HMACSHA256

[stevenjin]

谢谢，这个可以用

	//通过appSecret计算出来的签名值
		private static string HmacSHA256(string appSecret, string timeStamp)
		{
			timeStamp = timeStamp ?? "";
			var encoding = new System.Text.UTF8Encoding();
			byte[] keyByte = encoding.GetBytes(appSecret);
			byte[] messageBytes = encoding.GetBytes(timeStamp);
			using (var hmacsha256 = new HMACSHA256(keyByte))
			{
				byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
				return Convert.ToBase64String(hashmessage);
			}
		}