a w=ic@sdZddlmZddlZddlmZddlmZddlmZddl m Z ddl m Z dd l m Z dd l mZddlZdd lmZdd lmZd ZeZe ZGdddejZGdddejejZdS)zIECDSA (ES256) verifier and signer that use the ``cryptography`` library. )utilsN)backends)hashes) serialization)ec)padding)decode_dss_signature)encode_dss_signature)_helpers)bases-----BEGIN CERTIFICATE-----c@s8eZdZdZddZeejddZ e ddZ dS) ES256VerifierzVerifies ECDSA cryptographic signatures using public keys. Args: public_key ( cryptography.hazmat.primitives.asymmetric.ec.ECDSAPublicKey): The public key used to verify signatures. cCs ||_dSN)_pubkey)self public_keyrh/home/droni/.local/share/virtualenvs/DPS-5Je3_V2c/lib/python3.9/site-packages/google/auth/crypt/es256.py__init__/szES256Verifier.__init__c Cst|}t|dkrdStr8tj|ddddntj|dddd}trltj|ddddntj|dddd}t||}t|}z |j ||t t WdSttjjfyYdS0dS)N@F big byteorderT)r to_byteslen is_python_3int from_bytesrZint_from_bytesr rverifyrECDSArSHA256 ValueError cryptography exceptionsZInvalidSignature)rmessage signatureZ sig_bytesrsZasn1_sigrrrr2s$    zES256Verifier.verifycCs>t|}t|vr*tj|t}|}n t |t}||S)ayConstruct an Verifier instance from a public key or public certificate string. Args: public_key (Union[str, bytes]): The public key in PEM format or the x509 public key certificate. Returns: Verifier: The constructed verifier. Raises: ValueError: If the public key can't be parsed. ) r r_CERTIFICATE_MARKERr"x509Zload_pem_x509_certificate_BACKENDrrZload_pem_public_key)clsrZpublic_key_datacertZpubkeyrrr from_stringKs   zES256Verifier.from_stringN) __name__ __module__ __qualname____doc__rr copy_docstringr Verifierr classmethodr-rrrrr &s   r c@sTeZdZdZd ddZeeej ddZ eej ddZ e d d d Z dS) ES256SigneraSigns messages with an ECDSA private key. Args: private_key ( cryptography.hazmat.primitives.asymmetric.ec.ECDSAPrivateKey): The private key to sign with. key_id (str): Optional key ID used to identify this private key. This can be useful to associate the private key with its associated public key or certificate. NcCs||_||_dSr )_key_key_id)r private_keykey_idrrrrtszES256Signer.__init__cCs|jSr )r7)rrrrr9xszES256Signer.key_idcCsjt|}|j|tt}t|\}}t rR|jddd|jdddSt |dt |dS)Nrrr) r rr6signrrrr rrrZ int_to_bytes)rr$Zasn1_signaturer&r'rrrr:}s  zES256Signer.signcCs&t|}tj|dtd}|||dS)alConstruct a RSASigner from a private key in PEM format. Args: key (Union[bytes, str]): Private key in PEM format. key_id (str): An optional key id used to identify the private key. Returns: google.auth.crypt._cryptography_rsa.RSASigner: The constructed signer. Raises: ValueError: If ``key`` is not ``bytes`` or ``str`` (unicode). UnicodeDecodeError: If ``key`` is ``bytes`` but cannot be decoded into a UTF-8 ``str``. ValueError: If ``cryptography`` "Could not deserialize key data." N)passwordbackend)r9)r rrZload_pem_private_keyr*)r+keyr9r8rrrr-s  zES256Signer.from_string)N)N)r.r/r0r1rpropertyr r2r Signerr9r:r4r-rrrrr5hs     r5)r1r"rZcryptography.exceptionsZcryptography.hazmatrZcryptography.hazmat.primitivesrrZ)cryptography.hazmat.primitives.asymmetricrrZ/cryptography.hazmat.primitives.asymmetric.utilsrr Zcryptography.x509Z google.authr Zgoogle.auth.cryptr r(Zdefault_backendr*ZPKCS1v15Z_PADDINGr3r r?ZFromServiceAccountMixinr5rrrrs"          B