public RequestModel(string action, HmacType signatureMethod)
{
Action = action;
SignatureMethod = signatureMethod.ToString();
Timestamp = DateTimeOffset.Now.ToUnixTimeSeconds();
Nonce = new Random(DateTime.Now.Millisecond).Next(10000, 99999);
}
/// <summary>
/// HMAC VerityData
/// </summary>
/// <param name="key"></param>
/// <param name="content"></param>
/// <param name="hmacType"></param>
/// <returns></returns>
public static bool VerifyData(string key, string content, HmacType hmacType)
{
var data = content.Base64ToBytes();
var alg = GetHmac(key, hmacType);
return data.Take(alg.HashSize >> 3).SequenceEqual(alg.ComputeHash(data.Skip(alg.HashSize >> 3).ToArray()));
}
private static HMAC GetHmac(string key, HmacType hmacType)
{
var bytes = key.ToDefaultBytes();
switch (hmacType)
{
case HmacType.Ripemd160:
return new HMACRIPEMD160(bytes);
case HmacType.Sha1:
return new HMACSHA1(bytes);
case HmacType.Sha256:
return new HMACSHA256(bytes);
case HmacType.Sha384:
return new HMACSHA384(bytes);
case HmacType.Sha512:
return new HMACSHA512(bytes);
default:
return new HMACMD5(bytes);
}
}
/// <summary>
/// HMAC SignData
/// </summary>
/// <param name="key"></param>
/// <param name="content"></param>
/// <param name="hmacType"></param>
/// <returns></returns>
public static string SignData(string key, string content, HmacType hmacType)
{
var data = content.ToDefaultBytes();
var alg = GetHmac(key, hmacType);
return alg.ComputeHash(data).Concat(data).ToArray().Bytes2Base64();
}
