XMPP-specific SASL profile.
|Function||get_mechanisms||Parse the SASL feature to extract the available mechanism names.|
|Class||SASLError||SASL base exception.|
|Class||SASLNoAcceptableMechanism||The server did not present an acceptable SASL mechanism.|
|Class||SASLAuthError||SASL Authentication failed.|
|Class||SASLIncorrectEncodingError||SASL base64 encoding was incorrect.|
|Function||fromBase64||Decode base64 encoded string.|
|Class||SASLInitiatingInitializer||Stream initializer that performs SASL authentication.|
Parse the SASL feature to extract the available mechanism names.
Decode base64 encoded string.
This helper performs regular decoding of a base64 encoded string, but also rejects any characters that are not in the base64 alphabet and padding occurring elsewhere from the last or last two characters, as specified in section 14.9 of RFC 3920. This safeguards against various attack vectors among which the creation of a covert channel that "leaks" information.