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o �hq6 � @ s� d Z ddlmZ ddlZddlZddlmZ ddlmZ ddlm Z ddl m Z zddl Z W n e y? Z ze d�e�dZ[ww e�e�ZG d d � d e j�Z dd d �ZG d d� d�ZdS )z Authorization support for gRPC.� )�absolute_importN)�environment_vars)� exceptions)� _mtls_helper)�service_accountzWgRPC is not installed from please install the grpcio package to use the gRPC transport.c s2 e Zd ZdZd � fdd� Zdd� Zdd� Z� ZS ) �AuthMetadataPluginan A `gRPC AuthMetadataPlugin`_ that inserts the credentials into each request. .. _gRPC AuthMetadataPlugin: http://www.grpc.io/grpc/python/grpc.html#grpc.AuthMetadataPlugin Args: credentials (google.auth.credentials.Credentials): The credentials to add to requests. request (google.auth.transport.Request): A HTTP transport request object used to refresh credentials as needed. default_host (Optional[str]): A host like "pubsub.googleapis.com". This is used when a self-signed JWT is created from service account credentials. Nc s$ t t| ��� || _|| _|| _d S �N)�superr �__init__� _credentials�_request� _default_host)�self� credentials�request� default_host�� __class__� �P/usr/local/CyberPanel/lib/python3.10/site-packages/google/auth/transport/grpc.pyr 6 s zAuthMetadataPlugin.__init__c C sT i }t | jtj�r| j�| jrd�| j�nd� | j�| j|j |j |� t |� � �S )z�Gets the authorization headers for a request. Returns: Sequence[Tuple[str, str]]: A list of request headers (key, value) to add to the request. z https://{}/N) � isinstancer r � Credentials�_create_self_signed_jwtr �format�before_requestr � method_name� service_url�list�items)r �context�headersr r r �_get_authorization_headers? s �� z-AuthMetadataPlugin._get_authorization_headersc C s || � |�d� dS )a Passes authorization metadata into the given callback. Args: context (grpc.AuthMetadataContext): The RPC context. callback (grpc.AuthMetadataPluginCallback): The callback that will be invoked to pass in the authorization metadata. N)r! )r r �callbackr r r �__call__W s zAuthMetadataPlugin.__call__r )�__name__� __module__� __qualname__�__doc__r r! r# � __classcell__r r r r r % s r c K s� t | |�}t�|�}|r|rt�d��|s>t�tjd�}|dkr/|r/|� \} } tj | | d�}n|dkr:t � } | j }nt� � }t� ||�} tj || fi |��S )au Creates a secure authorized gRPC channel. This creates a channel with SSL and :class:`AuthMetadataPlugin`. This channel can be used to create a stub that can make authorized requests. Users can configure client certificate or rely on device certificates to establish a mutual TLS channel, if the `GOOGLE_API_USE_CLIENT_CERTIFICATE` variable is explicitly set to `true`. Example:: import google.auth import google.auth.transport.grpc import google.auth.transport.requests from google.cloud.speech.v1 import cloud_speech_pb2 # Get credentials. credentials, _ = google.auth.default() # Get an HTTP request function to refresh credentials. request = google.auth.transport.requests.Request() # Create a channel. channel = google.auth.transport.grpc.secure_authorized_channel( credentials, regular_endpoint, request, ssl_credentials=grpc.ssl_channel_credentials()) # Use the channel to create a stub. cloud_speech.create_Speech_stub(channel) Usage: There are actually a couple of options to create a channel, depending on if you want to create a regular or mutual TLS channel. First let's list the endpoints (regular vs mutual TLS) to choose from:: regular_endpoint = 'speech.googleapis.com:443' mtls_endpoint = 'speech.mtls.googleapis.com:443' Option 1: create a regular (non-mutual) TLS channel by explicitly setting the ssl_credentials:: regular_ssl_credentials = grpc.ssl_channel_credentials() channel = google.auth.transport.grpc.secure_authorized_channel( credentials, regular_endpoint, request, ssl_credentials=regular_ssl_credentials) Option 2: create a mutual TLS channel by calling a callback which returns the client side certificate and the key (Note that `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable must be explicitly set to `true`):: def my_client_cert_callback(): code_to_load_client_cert_and_key() if loaded: return (pem_cert_bytes, pem_key_bytes) raise MyClientCertFailureException() try: channel = google.auth.transport.grpc.secure_authorized_channel( credentials, mtls_endpoint, request, client_cert_callback=my_client_cert_callback) except MyClientCertFailureException: # handle the exception Option 3: use application default SSL credentials. It searches and uses the command in a context aware metadata file, which is available on devices with endpoint verification support (Note that `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable must be explicitly set to `true`). See https://cloud.google.com/endpoint-verification/docs/overview:: try: default_ssl_credentials = SslCredentials() except: # Exception can be raised if the context aware metadata is malformed. # See :class:`SslCredentials` for the possible exceptions. # Choose the endpoint based on the SSL credentials type. if default_ssl_credentials.is_mtls: endpoint_to_use = mtls_endpoint else: endpoint_to_use = regular_endpoint channel = google.auth.transport.grpc.secure_authorized_channel( credentials, endpoint_to_use, request, ssl_credentials=default_ssl_credentials) Option 4: not setting ssl_credentials and client_cert_callback. For devices without endpoint verification support or `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is not `true`, a regular TLS channel is created; otherwise, a mutual TLS channel is created, however, the call should be wrapped in a try/except block in case of malformed context aware metadata. The following code uses regular_endpoint, it works the same no matter the created channle is regular or mutual TLS. Regular endpoint ignores client certificate and key:: channel = google.auth.transport.grpc.secure_authorized_channel( credentials, regular_endpoint, request) The following code uses mtls_endpoint, if the created channle is regular, and API mtls_endpoint is confgured to require client SSL credentials, API calls using this channel will be rejected:: channel = google.auth.transport.grpc.secure_authorized_channel( credentials, mtls_endpoint, request) Args: credentials (google.auth.credentials.Credentials): The credentials to add to requests. request (google.auth.transport.Request): A HTTP transport request object used to refresh credentials as needed. Even though gRPC is a separate transport, there's no way to refresh the credentials without using a standard http transport. target (str): The host and port of the service. ssl_credentials (grpc.ChannelCredentials): Optional SSL channel credentials. This can be used to specify different certificates. This argument is mutually exclusive with client_cert_callback; providing both will raise an exception. If ssl_credentials and client_cert_callback are None, application default SSL credentials are used if `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is explicitly set to `true`, otherwise one way TLS SSL credentials are used. client_cert_callback (Callable[[], (bytes, bytes)]): Optional callback function to obtain client certicate and key for mutual TLS connection. This argument is mutually exclusive with ssl_credentials; providing both will raise an exception. This argument does nothing unless `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable is explicitly set to `true`. kwargs: Additional arguments to pass to :func:`grpc.secure_channel`. Returns: grpc.Channel: The created gRPC channel. Raises: google.auth.exceptions.MutualTLSChannelError: If mutual TLS channel creation failed for any reason. zUReceived both ssl_credentials and client_cert_callback; these are mutually exclusive.�false�true��certificate_chain� private_key)r �grpc�metadata_call_credentialsr �MalformedError�os�getenvr �!GOOGLE_API_USE_CLIENT_CERTIFICATE�ssl_channel_credentials�SslCredentials�ssl_credentials� composite_channel_credentials�secure_channel) r r �targetr6 �client_cert_callback�kwargs�metadata_plugin�google_auth_credentials�use_client_cert�cert�key�adc_ssl_credentils�composite_credentialsr r r �secure_authorized_channelb s0 �� ��rC c @ s0 e Zd ZdZdd� Zedd� �Zedd� �ZdS ) r5 aF Class for application default SSL credentials. The behavior is controlled by `GOOGLE_API_USE_CLIENT_CERTIFICATE` environment variable whose default value is `false`. Client certificate will not be used unless the environment variable is explicitly set to `true`. See https://google.aip.dev/auth/4114 If the environment variable is `true`, then for devices with endpoint verification support, a device certificate will be automatically loaded and mutual TLS will be established. See https://cloud.google.com/endpoint-verification/docs/overview. c C s: t �tjd�}|dkrd| _d S t�tj�}|d u| _d S )Nr) r* F)r1 r2 r r3 �_is_mtlsr �_check_dca_metadata_path�CONTEXT_AWARE_METADATA_PATH)r r> � metadata_pathr r r r ) s � �zSslCredentials.__init__c C sj | j r-zt�� \}}}}tj||d�| _W | jS tjy, } zt�|�}||�d}~ww t�� | _| jS )a Get the created SSL channel credentials. For devices with endpoint verification support, if the device certificate loading has any problems, corresponding exceptions will be raised. For a device without endpoint verification support, no exceptions will be raised. Returns: grpc.ChannelCredentials: The created grpc channel credentials. Raises: google.auth.exceptions.MutualTLSChannelError: If mutual TLS channel creation failed for any reason. r+ N) rD r �get_client_ssl_credentialsr. r4 �_ssl_credentialsr �ClientCertError�MutualTLSChannelError)r �_r? r@ � caught_exc�new_excr r r r6 6 s � � �� z SslCredentials.ssl_credentialsc C s | j S )z?Indicates if the created SSL channel credentials is mutual TLS.)rD )r r r r �is_mtlsT s zSslCredentials.is_mtlsN)r$ r% r& r' r �propertyr6 rO r r r r r5 s r5 )NN)r' � __future__r �loggingr1 � google.authr r �google.auth.transportr � google.oauth2r r. � ImportErrorrM � getLoggerr$ �_LOGGERr rC r5 r r r r �<module> s2 ���� A � :
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