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Keyring implementation support
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A metaclass that's both an ABCMeta and a type that keeps a registry of
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Each backend class must supply a priority, a number (float or integer)
indicating the priority of the backend relative to all other backends.
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attributes of the environment in which is runs (platform, available
packages, etc.).
A higher number indicates a higher priority. The priority should raise
a RuntimeError with a message indicating the underlying cause if the
backend is not suitable for the current environment.
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suitable, but a priority of one or greater is recommended.
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Return all subclasses deemed viable.
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The keyring name, suitable for display.
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keyring_classr r r �__str__Z s �zKeyringBackend.__str__�service�username�returnc C r# )z,Get password of the username for the serviceNr �r" r9 r: r r r � get_password` � zKeyringBackend.get_password�passwordNc C �
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zKeyringBackend.set_passwordc C r@ )z�Delete the password for the username of the service.
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rA )r �PasswordDeleteErrorr< r r r �delete_passwordq s
z KeyringBackend.delete_passwordc C s, |dur| � ||�}|durt�||�S dS )a Gets the username and password for the service.
Returns a Credential instance.
The *username* argument is optional and may be omitted by
the caller or ignored by the backend. Callers must use the
returned username.
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\}}t| ||� qdS )z6For all KEYRING_PROPERTY_* env var, set that property.c S s( | \}}|� d�\}}}|o|�� |fS )N�KEYRING_PROPERTY_)� partition�lower)�item�key�value�prer3 r r r r �parse� s z5KeyringBackend.set_properties_from_env.<locals>.parseN)r( �map�os�environ�items�setattr)r" rP �propsr rN r r r r! � s
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� r )� metaclassc @ s, e Zd ZdZejdd� �Zejdd� �ZdS )�Crypterz.Base class providing encryption and decryptionc C r# )zEncrypt the value.Nr �r" rN r r r �encrypt� r> zCrypter.encryptc C r# )zDecrypt the value.Nr r_ r r r �decrypt� r> zCrypter.decryptN)r r r r rY rZ r` ra r r r r r^ � s
r^ c @ s e Zd ZdZdd� Zdd� ZdS )� NullCrypterzA crypter that does nothingc C � |S r r r_ r r r r` � � zNullCrypter.encryptc C rc r r r_ r r r ra � rd zNullCrypter.decryptN)r r r r r` ra r r r r rb � s rb c C sb t jdd�D ](} zt�d| j� | �� }t|�r|� W q ty. t�d| � d�� Y qw dS )a�
Locate all setuptools entry points by the name 'keyring backends'
and initialize them.
Any third-party library may register an entry point by adding the
following to their setup.cfg::
[options.entry_points]
keyring.backends =
plugin_name = mylib.mymodule:initialize_func
`plugin_name` can be anything, and is only used to display the name
of the plugin at initialization time.
`initialize_func` is optional, but will be invoked if callable.
zkeyring.backends)�groupz
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Return a list of all implemented keyrings that can be constructed without
parameters.
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