public async Task <CheckOneTimeCodeResponse> CheckOneTimeCodeAsync(string sentTo, string shortCode)
{
var otc = await _oneTimeCodeStore.GetOneTimeCodeAsync(sentTo);
if (otc == null)
{
return(new CheckOneTimeCodeResponse(CheckOneTimeCodeResult.NotFound));
}
if (otc.ExpiresUTC < DateTime.UtcNow)
{
return(new CheckOneTimeCodeResponse(CheckOneTimeCodeResult.Expired));
}
if (!string.IsNullOrEmpty(shortCode) && shortCode.Length <= 8)
{
if (otc.FailedAttemptCount > 1)
{
// maximum of 2 attempts during code validity period to prevent guessing attacks
// long code remains valid, preventing account lockout attacks (and giving a fumbling but valid user another way in)
return(new CheckOneTimeCodeResponse(CheckOneTimeCodeResult.ShortCodeLocked));
}
var checkResult = _passwordHashService.CheckPasswordHash(otc.ShortCodeHash, shortCode);
if (checkResult == CheckPaswordHashResult.Matches || checkResult == CheckPaswordHashResult.MatchesNeedsRehash)
{
await _oneTimeCodeStore.ExpireOneTimeCodeAsync(sentTo);
return(new CheckOneTimeCodeResponse(CheckOneTimeCodeResult.Verified, sentTo, otc.RedirectUrl));
}
}
await _oneTimeCodeStore.UpdateOneTimeCodeFailureAsync(sentTo, otc.FailedAttemptCount + 1);
return(new CheckOneTimeCodeResponse(CheckOneTimeCodeResult.CodeIncorrect));
}
public async Task <Response <CheckOneTimeCodeResult, CheckOneTimeCodeStatus> > CheckOneTimeCodeAsync(string sentTo, string shortCode, string clientNonce)
{
_logger.LogTrace("Checking short code");
var response = await _oneTimeCodeStore.GetOneTimeCodeAsync(sentTo);
if (response.HasError)
{
return(new Response <CheckOneTimeCodeResult, CheckOneTimeCodeStatus>(
CheckOneTimeCodeStatus.Error(_localizer["One time code not found."], CheckOneTimeCodeStatusCode.NotFound)));
}
var otc = response.Result;
if (otc.ExpiresUTC < DateTime.UtcNow)
{
_logger.LogDebug("The one time code has expired.");
return(new Response <CheckOneTimeCodeResult, CheckOneTimeCodeStatus>(
CheckOneTimeCodeStatus.Error(_localizer["The one time code has expired."], CheckOneTimeCodeStatusCode.Expired)));
}
if (!string.IsNullOrEmpty(shortCode) && shortCode.Length == PasswordlessLoginConstants.OneTimeCode.ShortCodeLength)
{
if (otc.FailedAttemptCount >= PasswordlessLoginConstants.OneTimeCode.MaxFailedAttemptCount)
{
// maximum of 3 attempts during code validity period to prevent guessing attacks
// long code remains valid, preventing account lockout attacks (and giving a fumbling but valid user another way in)
_logger.LogDebug("The one time code is locked (too many failed attempts to use it).");
return(new Response <CheckOneTimeCodeResult, CheckOneTimeCodeStatus>(
CheckOneTimeCodeStatus.Error(_localizer["The one time code is locked."], CheckOneTimeCodeStatusCode.ShortCodeLocked)));
}
if (shortCode == otc.ShortCode)
{
_logger.LogDebug("The one time code matches");
return(await ExpireTokenAndValidateNonceAsync(otc, clientNonce));
}
}
else
{
_logger.LogDebug("The one time code was missing or was the wrong length");
}
_logger.LogDebug("Updating failure count for one time code");
await _oneTimeCodeStore.UpdateOneTimeCodeFailureAsync(sentTo, otc.FailedAttemptCount + 1);
return(new Response <CheckOneTimeCodeResult, CheckOneTimeCodeStatus>(
CheckOneTimeCodeStatus.Error(_localizer["The one time code was not correct."], CheckOneTimeCodeStatusCode.CodeIncorrect)));
}