Implements interfaces: twisted.cred.checkers.ICredentialsChecker

Checker that authenticates SSH public keys, based on public keys listed in authorized_keys and authorized_keys2 files in user .ssh/ directories.

Method requestAvatarId Validate credentials and produce an avatar ID.
Method getAuthorizedKeysFiles Return a list of FilePath instances for authorized_keys files which might contain information about authorized keys for the given credentials.
Method checkKey Retrieve files containing authorized keys and check against user credentials.
Method _cbRequestAvatarId Check whether the credentials themselves are valid, now that we know if the key matches the user.
Method _ebRequestAvatarId Undocumented
def requestAvatarId(self, credentials):

Validate credentials and produce an avatar ID.

Parameterscredentialssomething which implements one of the interfaces in credentialInterfaces.
Returnsa Deferred which will fire with a bytes that identifies an avatar, an empty tuple to specify an authenticated anonymous user (provided as twisted.cred.checkers.ANONYMOUS) or fail with UnauthorizedLogin. Alternatively, return the result itself.
See Alsotwisted.cred.credentials
def _cbRequestAvatarId(self, validKey, credentials):

Check whether the credentials themselves are valid, now that we know if the key matches the user.

ParametersvalidKeyA boolean indicating whether or not the public key matches a key in the user's authorized_keys file.
credentialsThe credentials offered by the user. (type: ISSHPrivateKey provider)
ReturnsThe user's username, if authentication was successful.
RaisesUnauthorizedLogin(as a failure) if the key does not match the user in credentials. Also raised if the user provides an invalid signature.
ValidPublicKey(as a failure) if the key matches the user but the credentials do not include a signature. See error.ValidPublicKey for more information.
def getAuthorizedKeysFiles(self, credentials):

Return a list of FilePath instances for authorized_keys files which might contain information about authorized keys for the given credentials.

On OpenSSH servers, the default location of the file containing the list of authorized public keys is $HOME/.ssh/authorized_keys.

$HOME/.ssh/authorized_keys2 is also returned, though it has been deprecated by OpenSSH since 2001.

ReturnsA list of FilePath instances to files with the authorized keys.
def checkKey(self, credentials):

Retrieve files containing authorized keys and check against user credentials.

def _ebRequestAvatarId(self, f):
Undocumented
API Documentation for twisted, generated by pydoctor at 2020-03-25 17:34:30.