# Copyright (C) 2015-2019 Virgil Security, Inc.
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# Lead Maintainer: Virgil Security Inc. <support@virgilsecurity.com>


from virgil_crypto_lib._libs import *
from ctypes import *
from ._vscf_impl import vscf_impl_t
from ._vscf_raw_public_key import vscf_raw_public_key_t
from virgil_crypto_lib.common._c_bridge import vsc_buffer_t
from ._vscf_raw_private_key import vscf_raw_private_key_t
from ._vscf_error import vscf_error_t


class vscf_key_asn1_serializer_t(Structure):
    pass


class VscfKeyAsn1Serializer(object):
    """Implements key serialization in the ASN.1 format (DER / PEM):
        - SEC1 - for EC private keys;
        - PKCS#8 - for other keys."""

    def __init__(self):
        """Create underlying C context."""
        self._ll = LowLevelLibs()
        self._lib = self._ll.foundation

    def vscf_key_asn1_serializer_new(self):
        vscf_key_asn1_serializer_new = self._lib.vscf_key_asn1_serializer_new
        vscf_key_asn1_serializer_new.argtypes = []
        vscf_key_asn1_serializer_new.restype = POINTER(vscf_key_asn1_serializer_t)
        return vscf_key_asn1_serializer_new()

    def vscf_key_asn1_serializer_delete(self, ctx):
        vscf_key_asn1_serializer_delete = self._lib.vscf_key_asn1_serializer_delete
        vscf_key_asn1_serializer_delete.argtypes = [POINTER(vscf_key_asn1_serializer_t)]
        vscf_key_asn1_serializer_delete.restype = None
        return vscf_key_asn1_serializer_delete(ctx)

    def vscf_key_asn1_serializer_use_asn1_writer(self, ctx, asn1_writer):
        vscf_key_asn1_serializer_use_asn1_writer = self._lib.vscf_key_asn1_serializer_use_asn1_writer
        vscf_key_asn1_serializer_use_asn1_writer.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_impl_t)]
        vscf_key_asn1_serializer_use_asn1_writer.restype = None
        return vscf_key_asn1_serializer_use_asn1_writer(ctx, asn1_writer)

    def vscf_key_asn1_serializer_serialized_public_key_len(self, ctx, public_key):
        """Calculate buffer size enough to hold serialized public key.

        Precondition: public key must be exportable."""
        vscf_key_asn1_serializer_serialized_public_key_len = self._lib.vscf_key_asn1_serializer_serialized_public_key_len
        vscf_key_asn1_serializer_serialized_public_key_len.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_raw_public_key_t)]
        vscf_key_asn1_serializer_serialized_public_key_len.restype = c_size_t
        return vscf_key_asn1_serializer_serialized_public_key_len(ctx, public_key)

    def vscf_key_asn1_serializer_serialize_public_key(self, ctx, public_key, out):
        """Serialize given public key to an interchangeable format.

        Precondition: public key must be exportable."""
        vscf_key_asn1_serializer_serialize_public_key = self._lib.vscf_key_asn1_serializer_serialize_public_key
        vscf_key_asn1_serializer_serialize_public_key.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_raw_public_key_t), POINTER(vsc_buffer_t)]
        vscf_key_asn1_serializer_serialize_public_key.restype = c_int
        return vscf_key_asn1_serializer_serialize_public_key(ctx, public_key, out)

    def vscf_key_asn1_serializer_serialized_private_key_len(self, ctx, private_key):
        """Calculate buffer size enough to hold serialized private key.

        Precondition: private key must be exportable."""
        vscf_key_asn1_serializer_serialized_private_key_len = self._lib.vscf_key_asn1_serializer_serialized_private_key_len
        vscf_key_asn1_serializer_serialized_private_key_len.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_raw_private_key_t)]
        vscf_key_asn1_serializer_serialized_private_key_len.restype = c_size_t
        return vscf_key_asn1_serializer_serialized_private_key_len(ctx, private_key)

    def vscf_key_asn1_serializer_serialize_private_key(self, ctx, private_key, out):
        """Serialize given private key to an interchangeable format.

        Precondition: private key must be exportable."""
        vscf_key_asn1_serializer_serialize_private_key = self._lib.vscf_key_asn1_serializer_serialize_private_key
        vscf_key_asn1_serializer_serialize_private_key.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_raw_private_key_t), POINTER(vsc_buffer_t)]
        vscf_key_asn1_serializer_serialize_private_key.restype = c_int
        return vscf_key_asn1_serializer_serialize_private_key(ctx, private_key, out)

    def vscf_key_asn1_serializer_setup_defaults(self, ctx):
        """Setup predefined values to the uninitialized class dependencies."""
        vscf_key_asn1_serializer_setup_defaults = self._lib.vscf_key_asn1_serializer_setup_defaults
        vscf_key_asn1_serializer_setup_defaults.argtypes = [POINTER(vscf_key_asn1_serializer_t)]
        vscf_key_asn1_serializer_setup_defaults.restype = None
        return vscf_key_asn1_serializer_setup_defaults(ctx)

    def vscf_key_asn1_serializer_serialize_public_key_inplace(self, ctx, public_key, error):
        """Serialize Public Key by using internal ASN.1 writer.
        Note, that caller code is responsible to reset ASN.1 writer with
        an output buffer."""
        vscf_key_asn1_serializer_serialize_public_key_inplace = self._lib.vscf_key_asn1_serializer_serialize_public_key_inplace
        vscf_key_asn1_serializer_serialize_public_key_inplace.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_raw_public_key_t), POINTER(vscf_error_t)]
        vscf_key_asn1_serializer_serialize_public_key_inplace.restype = c_size_t
        return vscf_key_asn1_serializer_serialize_public_key_inplace(ctx, public_key, error)

    def vscf_key_asn1_serializer_serialize_private_key_inplace(self, ctx, private_key, error):
        """Serialize Private Key by using internal ASN.1 writer.
        Note, that caller code is responsible to reset ASN.1 writer with
        an output buffer."""
        vscf_key_asn1_serializer_serialize_private_key_inplace = self._lib.vscf_key_asn1_serializer_serialize_private_key_inplace
        vscf_key_asn1_serializer_serialize_private_key_inplace.argtypes = [POINTER(vscf_key_asn1_serializer_t), POINTER(vscf_raw_private_key_t), POINTER(vscf_error_t)]
        vscf_key_asn1_serializer_serialize_private_key_inplace.restype = c_size_t
        return vscf_key_asn1_serializer_serialize_private_key_inplace(ctx, private_key, error)

    def vscf_key_asn1_serializer_shallow_copy(self, ctx):
        vscf_key_asn1_serializer_shallow_copy = self._lib.vscf_key_asn1_serializer_shallow_copy
        vscf_key_asn1_serializer_shallow_copy.argtypes = [POINTER(vscf_key_asn1_serializer_t)]
        vscf_key_asn1_serializer_shallow_copy.restype = POINTER(vscf_key_asn1_serializer_t)
        return vscf_key_asn1_serializer_shallow_copy(ctx)

    def vscf_key_asn1_serializer_impl(self, ctx):
        vscf_key_asn1_serializer_impl = self._lib.vscf_key_asn1_serializer_impl
        vscf_key_asn1_serializer_impl.argtypes = [POINTER(vscf_key_asn1_serializer_t)]
        vscf_key_asn1_serializer_impl.restype = POINTER(vscf_impl_t)
        return vscf_key_asn1_serializer_impl(ctx)
