getRawStep method
- String input
override
Perform a SASL step with input
as the already parsed input data. Returns
the base64-encoded response data.
Implementation
@override
Future<String> getRawStep(String input) async {
switch (_scramState) {
case ScramState.preSent:
if (clientNonce == null || clientNonce == '') {
clientNonce = randomAlphaNumeric(
40,
provider: CoreRandomProvider.from(Random.secure()),
);
}
initialMessageNoGS2 =
'n=${attributes.getConnectionSettings().jid.local},r=$clientNonce';
_scramState = ScramState.initialMessageSent;
return base64.encode(utf8.encode(gs2Header + initialMessageNoGS2));
case ScramState.initialMessageSent:
final challengeBase64 = input;
final response = await calculateChallengeResponse(challengeBase64);
final responseBase64 = base64.encode(utf8.encode(response));
_scramState = ScramState.challengeResponseSent;
return responseBase64;
case ScramState.challengeResponseSent:
case ScramState.error:
return '';
}
}