public static bool TryParse(string input, out ApiRequestSignature parsedValue)
{
parsedValue = null;
var success = false;
if (input != null)
{
var parts = input.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length == 3)
{
if (parts[2].Length == 64)
{
DateTime timestamp;
if (DateTime.TryParseExact(parts[1], _timestampFormats, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal, out timestamp))
{
parsedValue = new ApiRequestSignature
{
AppId = parts[0],
TimestampString = parts[1],
Hash = parts[2],
Timestamp = timestamp,
};
success = true;
}
}
}
}
return(success);
}
private bool IsValidSignature(ApiRequestSignature signature, ApiAccountEntity credentials)
{
var parameters = new[]
{
new NameValuePair(null, signature.AppId),
new NameValuePair(null, signature.TimestampString)
};
var validSignature = HmacUtility.GetHashString(Options.HmacFactory, credentials.SecretKey, parameters);
var isValid = string.Equals(signature.Hash, validSignature, StringComparison.OrdinalIgnoreCase);
return(isValid);
}
protected override string ExtractUserIdFromRequest()
{
string userId = null;
var credentials = GetAuthenticationHeaderCredentials();
ApiRequestSignature signature;
if (ApiRequestSignature.TryParse(credentials, out signature))
{
if ((DateTime.UtcNow - signature.Timestamp).Duration() < Options.SignatureValidityPeriod)
{
var apiAccount = Options.ApiCredentialsProvider.GetAccountByAppId(ApiAccountType.Hmac, signature.AppId);
if (apiAccount != null && IsValidSignature(signature, apiAccount))
{
userId = apiAccount.AccountId;
}
}
}
return(userId);
}
public static bool TryParse(string input, out ApiRequestSignature parsedValue)
{
parsedValue = null;
var success = false;
if (input != null)
{
var parts = input.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length == 3)
{
if (parts[2].Length == 64)
{
DateTime timestamp;
if (DateTime.TryParseExact(parts[1], _timestampFormats, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal, out timestamp))
{
parsedValue = new ApiRequestSignature
{
AppId = parts[0],
TimestampString = parts[1],
Hash = parts[2],
Timestamp = timestamp,
};
success = true;
}
}
}
}
return success;
}
