public Signature(string _appId)
{
this.appId = _appId;
this.nonce = Guid.NewGuid().ToString();
this.timestamp = DateTime.Now.ToString(Signature.TimeStampFormat);
this.signature = SHA256CrypHelper.GetHashStr(this.appId + this.nonce + this.timestamp);
}
public Signature(string _appId, string _nonce, string _timestamp)
{
this.appId = _appId;
this.nonce = _nonce;
this.timestamp = _timestamp;
this.signature = SHA256CrypHelper.GetHashStr(this.appId + this.nonce + this.timestamp);
}
public Signature(string _appId, string _nonce, DateTime _timestamp)
{
this.appId = _appId;
this.nonce = _nonce;
this.timestamp = _timestamp.ToString(Signature.TimeStampFormat);
this.signature = SHA256CrypHelper.GetHashStr(this.appId + this.nonce + this.timestamp);
}
/// <summary>
/// 进行签名检查
/// </summary>
/// <param name="signature">签名</param>
/// <param name="timestamp">时间戳（ToString("yyyyMMddHHmmssffff")）</param>
/// <param name="nonce">随机数</param>
/// <param name="appid">应用接入ID</param>
/// <returns></returns>
public static SignCheckResult ValidateSignature(string signature, string timestamp, string nonce, string appid)
{
SignCheckResult result = new SignCheckResult()
{
IsSuccess = false,
Description = "签名完整性检查不通过！"
};
if (string.IsNullOrEmpty(signature) || string.IsNullOrEmpty(timestamp) || string.IsNullOrEmpty(nonce) || string.IsNullOrEmpty(appid))
{
result.IsSuccess = false;
result.Description = "所需的字段为空！";
return(result);
}
string hashStr = SHA256CrypHelper.GetHashStr(appid + nonce + timestamp);
if (hashStr == signature)
{
DateTime dtTime;
try
{
dtTime = DateTime.ParseExact(timestamp, Signature.TimeStampFormat, CultureInfo.CurrentCulture);
}
catch (Exception ex)
{
result.Description = "时间戳格式错误！";
return(result);
}
double minutes = DateTime.Now.Subtract(dtTime).TotalMinutes;
if (minutes > TimspanExpiredMinutes)
{
result.Description = "签名时间戳失效！";
}
else
{
result.Description = "签名验证成功！";
result.IsSuccess = true;
}
}
return(result);
}