aiowamp.CRAuth

class aiowamp.CRAuth(secret)

Auth method for challenge response authentication.

WAMP Challenge-Response (“WAMP-CRA”) authentication is a simple, secure authentication mechanism using a shared secret. The client and the server share a secret. The secret never travels the wire, hence WAMP-CRA can be used via non-TLS connections. The actual pre-sharing of the secret is outside the scope of the authentication mechanism.

Parameters:secret (str) –

Initialise the auth method.

Parameters:secret (str) – Secret to use.

__init__(secret)

Initialise the auth method.

Parameters:secret (str) – Secret to use. Return type:None

Methods

__init__(secret)	Initialise the auth method.
authenticate(challenge)	Generate an authenticate message for the challenge.
check_welcome(welcome)	Check the welcome message sent by the router.
pbkdf2_hmac(salt, key_len, iterations)	Derive the token using the pdkdf2 scheme.

Attributes

auth_extra	Additional auth extras that need to be passed along.
method_name
requires_auth_id	Whether the auth method requires auth_id to be set.
secret	Secret to use for authentication.

__init__(secret)

Initialise the auth method.

Parameters:secret (str) – Secret to use. Return type:None

__repr__()

Return repr(self).

Return type:str

requires_auth_id

Whether the auth method requires auth_id to be set.

Return type:bool

auth_extra

Additional auth extras that need to be passed along.

None indicates that no extras need to be passed.

Return type:None

pbkdf2_hmac(salt, key_len, iterations)

Derive the token using the pdkdf2 scheme.

Parameters:

• salt (str) – Salt
• key_len (int) – Key length
• iterations (int) – Amount of iterations

Return type:

bytes

Returns:

Generated token bytes.

secret

Secret to use for authentication.

authenticate(challenge)

Generate an authenticate message for the challenge.

Parameters:challenge (Challenge) – Challenge message to respond to. Return type:Authenticate Returns:Either an authenticate message to send to the router or an abort message to indicate that the attempt should be aborted. Raises:Exception – When something goes wrong during authentication. Should be interpreted the same as an abort message.