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from ctypes import *
from ._c_bridge import VscfKeyAlgFactory
from ._c_bridge._vscf_error import vscf_error_t
from ._c_bridge import VscfImplTag
from ._c_bridge import VscfStatus


class KeyAlgFactory(object):
    """Create a bridge between "raw keys" and algorithms that can import them."""

    def __init__(self):
        """Create underlying C context."""
        self._lib_vscf_key_alg_factory = VscfKeyAlgFactory()

    def create_from_alg_id(self, alg_id, random):
        """Create a key algorithm based on an identifier."""
        error = vscf_error_t()
        result = self._lib_vscf_key_alg_factory.vscf_key_alg_factory_create_from_alg_id(alg_id, random.c_impl, error)
        VscfStatus.handle_status(error.status)
        instance = VscfImplTag.get_type(result)[0].take_c_ctx(cast(result, POINTER(VscfImplTag.get_type(result)[1])))
        return instance

    def create_from_key(self, key, random):
        """Create a key algorithm correspond to a specific key."""
        error = vscf_error_t()
        result = self._lib_vscf_key_alg_factory.vscf_key_alg_factory_create_from_key(key.c_impl, random.c_impl, error)
        VscfStatus.handle_status(error.status)
        instance = VscfImplTag.get_type(result)[0].take_c_ctx(cast(result, POINTER(VscfImplTag.get_type(result)[1])))
        return instance

    def create_from_raw_public_key(self, public_key, random):
        """Create a key algorithm that can import "raw public key"."""
        error = vscf_error_t()
        result = self._lib_vscf_key_alg_factory.vscf_key_alg_factory_create_from_raw_public_key(public_key.ctx, random.c_impl, error)
        VscfStatus.handle_status(error.status)
        instance = VscfImplTag.get_type(result)[0].take_c_ctx(cast(result, POINTER(VscfImplTag.get_type(result)[1])))
        return instance

    def create_from_raw_private_key(self, private_key, random):
        """Create a key algorithm that can import "raw private key"."""
        error = vscf_error_t()
        result = self._lib_vscf_key_alg_factory.vscf_key_alg_factory_create_from_raw_private_key(private_key.ctx, random.c_impl, error)
        VscfStatus.handle_status(error.status)
        instance = VscfImplTag.get_type(result)[0].take_c_ctx(cast(result, POINTER(VscfImplTag.get_type(result)[1])))
        return instance
