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from injector import inject
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from src.dao.private_key_repository import PrivateKeyRepository
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from src.model.private_key import PrivateKey
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from src.services.cryptography import CryptographyService
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from src.utils.logger import Logger
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class KeyService:
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@inject
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def __init__(self, cryptography_service: CryptographyService, private_key_repository: PrivateKeyRepository):
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self.cryptography_service = cryptography_service
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self.private_key_repository = private_key_repository
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def create_new_key(self, passphrase="") -> PrivateKey:
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"""
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Creates a new private key using the given passphrase.
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:param passphrase: Passphrase to be used when encrypting the PK
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:return: An instance of the <PrivateKey> class representing the generated PK
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"""
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Logger.debug("Function launched.")
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# generate a new private key
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private_key_pem = self.cryptography_service.create_private_key(passphrase)
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# store generated PK and the passphrase in a wrapper
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private_key = PrivateKey(-1, private_key_pem, passphrase)
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# store the wrapper in the PK repository
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private_key_id = self.private_key_repository.create(private_key)
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# assign the generated ID to the wrapper
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private_key.private_key_id = private_key_id
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return private_key
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def get_key(self, unique_id):
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"""
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Tries to fetch a PK using the given ID.
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:param unique_id: ID of the PK to be found
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:return:An instance of the required PK or `None`
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"""
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Logger.debug("Function launched.")
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return self.private_key_repository.read(unique_id)
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def get_keys(self, unique_ids=None):
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"""
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Tries to fetch all PKs in the repository. Exact PKs to be fetched can be specified using the `unique_ids`
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parameter. If `unique_ids` parameter is not passed then all PKs in the repository are returned.
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:param unique_ids: An array containing IDs of PKs to be fetched from the repository.
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:return: A list of instances of the PrivateKey class representing the PKs found
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"""
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Logger.debug("Function launched.")
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if unique_ids is None:
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return self.private_key_repository.read_all()
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else:
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# TODO this is very inefficient
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return [self.private_key_repository.read(identifier) for identifier in unique_ids]
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def delete_key(self, unique_id):
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"""
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Deletes a private key
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:param unique_id: ID of specific certificate to be deleted
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:return: `True` when the deletion was successful. `False` in other case
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"""
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Logger.debug("Function launched.")
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return self.private_key_repository.delete(unique_id)
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def get_public_key(self, private_key: PrivateKey):
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"""
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Extracts a public key from the given private key
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:param private_key: private key from which a public key should be extracted
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:return: a string containing the extracted public key in PEM format
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"""
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Logger.debug("Function launched.")
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return self.cryptography_service.extract_public_key_from_private_key(private_key.private_key,
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private_key.password)
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