/// <summary>
/// 核对签名
/// </summary>
/// <returns></returns>
public bool CheckSign(out string errMsg)
{
if (string.IsNullOrWhiteSpace(RsaKey))
{
errMsg = "rsaKey is null."; return(false);
}
if (string.IsNullOrWhiteSpace(Ciphertext))
{
errMsg = "ciphertext is null."; return(false);
}
if (Timestamp == 0)
{
errMsg = "timestamp is null."; return(false);
}
if (string.IsNullOrWhiteSpace(Sign))
{
errMsg = "sign is null."; return(false);
}
//var st = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(Timestamp);
//if (Math.Abs(st.Days) >= 1) { errMsg = "timestamp is error."; return false; }
var txt = $"{Ciphertext.ToSafeString()}|{RsaKey.ToSafeString()}|{Timestamp.ToSafeString()}";
var hash = HashUtil.GetMd5String(txt);
if (Sign.ToUpper() != hash)
{
errMsg = "sign is error.";
return(false);
}
errMsg = null;
return(true);
}