feature(keyringctl): verify file structure integrity and packets
This moves all verify code to an own module and adds support to check all packet files in the structure for integrity. This is done by parsing assumptions like packet kind, type, issuer and location etc.
This commit is contained in:
Levente Polyak
parent
d9e9453d84
commit
e55042e45b
@ -5,8 +5,8 @@ from pathlib import Path
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from typing import List
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from typing import List
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from .git import git_changed_files
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from .git import git_changed_files
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from .keyring import verify
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from .util import get_parent_cert_paths
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from .util import get_parent_cert_paths
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from .verify import verify
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def ci(working_dir: Path, keyring_root: Path, project_root: Path) -> None:
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def ci(working_dir: Path, keyring_root: Path, project_root: Path) -> None:
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@ -15,9 +15,9 @@ from .keyring import convert
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from .keyring import export
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from .keyring import export
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from .keyring import inspect_keyring
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from .keyring import inspect_keyring
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from .keyring import list_keyring
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from .keyring import list_keyring
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from .keyring import verify
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from .util import absolute_path
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from .util import absolute_path
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from .util import cwd
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from .util import cwd
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from .verify import verify
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parser = ArgumentParser()
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parser = ArgumentParser()
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parser.add_argument(
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parser.add_argument(
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@ -9,8 +9,6 @@ from re import escape
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from re import match
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from re import match
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from re import sub
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from re import sub
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from shutil import copytree
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from shutil import copytree
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from subprocess import PIPE
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from subprocess import Popen
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from tempfile import NamedTemporaryFile
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from tempfile import NamedTemporaryFile
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from tempfile import mkdtemp
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from tempfile import mkdtemp
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from typing import Dict
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from typing import Dict
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@ -34,7 +32,6 @@ from .types import Uid
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from .types import Username
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from .types import Username
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from .util import filter_fingerprints_by_trust
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from .util import filter_fingerprints_by_trust
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from .util import get_cert_paths
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from .util import get_cert_paths
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from .util import system
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from .util import get_fingerprint_from_partial
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from .util import get_fingerprint_from_partial
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from .util import transform_fd_to_tmpfile
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from .util import transform_fd_to_tmpfile
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@ -955,55 +952,6 @@ def inspect_keyring(working_dir: Path, keyring_root: Path, sources: Optional[Lis
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)
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)
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def verify(
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working_dir: Path,
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keyring_root: Path,
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sources: Optional[List[Path]],
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lint_hokey: bool = True,
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lint_sq_keyring: bool = True,
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) -> None:
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"""Verify certificates against modern expectations using sq-keyring-linter and hokey
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Parameters
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----------
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working_dir: A directory to use for temporary files
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keyring_root: The keyring root directory to look up username shorthand sources
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sources: A list of username, fingerprint or directories from which to read PGP packet information
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(defaults to `keyring_root`)
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lint_hokey: Whether to run hokey lint
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lint_sq_keyring: Whether to run sq-keyring-linter
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"""
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if not sources:
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sources = [keyring_root]
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# transform shorthand paths to actual keyring paths
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transform_username_to_keyring_path(keyring_dir=keyring_root / "packager", paths=sources)
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transform_fingerprint_to_keyring_path(keyring_root=keyring_root, paths=sources)
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cert_paths: Set[Path] = get_cert_paths(sources)
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for certificate in sorted(cert_paths):
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print(f"Verify {certificate.name} owned by {certificate.parent.name}")
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with NamedTemporaryFile(
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dir=working_dir, prefix=f"{certificate.parent.name}-{certificate.name}", suffix=".asc"
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) as keyring:
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keyring_path = Path(keyring.name)
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export(
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working_dir=working_dir,
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keyring_root=keyring_root,
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sources=[certificate],
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output=keyring_path,
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)
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if lint_hokey:
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keyring_fd = Popen(("sq", "dearmor", f"{str(keyring_path)}"), stdout=PIPE)
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print(system(["hokey", "lint"], _stdin=keyring_fd.stdout), end="")
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if lint_sq_keyring:
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print(system(["sq-keyring-linter", f"{str(keyring_path)}"]), end="")
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def get_fingerprints_from_paths(sources: Iterable[Path]) -> Set[Fingerprint]:
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def get_fingerprints_from_paths(sources: Iterable[Path]) -> Set[Fingerprint]:
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"""Get the fingerprints of all certificates found in the sources paths.
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"""Get the fingerprints of all certificates found in the sources paths.
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@ -11,6 +11,7 @@ from typing import List
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from typing import Optional
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from typing import Optional
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from .types import Fingerprint
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from .types import Fingerprint
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from .types import PacketKind
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from .types import Uid
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from .types import Uid
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from .types import Username
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from .types import Username
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from .util import cwd
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from .util import cwd
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@ -208,6 +209,26 @@ def packet_signature_creation_time(packet: Path) -> datetime:
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return datetime.strptime(packet_dump_field(packet, "Signature creation time"), "%Y-%m-%d %H:%M:%S %Z")
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return datetime.strptime(packet_dump_field(packet, "Signature creation time"), "%Y-%m-%d %H:%M:%S %Z")
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def packet_kinds(packet: Path) -> List[PacketKind]:
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"""Retrieve the PGP packet types of a packet path
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Parameters
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----------
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packet: The path to the PGP packet to retrieve the kind of
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Returns
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-------
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The kind of PGP packet
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"""
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dump = packet_dump(packet)
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lines = [line for line in dump.splitlines()]
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lines = list(
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filter(lambda line: not line.startswith(" ") and not line.startswith("WARNING") and line.strip(), lines)
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)
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return [PacketKind(line.split()[0]) for line in lines]
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def latest_certification(certifications: Iterable[Path]) -> Path:
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def latest_certification(certifications: Iterable[Path]) -> Path:
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"""Returns the latest certification based on the signature creation time from a list of packets.
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"""Returns the latest certification based on the signature creation time from a list of packets.
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@ -7,6 +7,7 @@ from typing import NewType
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Fingerprint = NewType("Fingerprint", str)
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Fingerprint = NewType("Fingerprint", str)
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Uid = NewType("Uid", str)
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Uid = NewType("Uid", str)
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Username = NewType("Username", str)
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Username = NewType("Username", str)
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PacketKind = NewType("PacketKind", str)
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class Trust(Enum):
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class Trust(Enum):
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304
libkeyringctl/verify.py
Normal file
304
libkeyringctl/verify.py
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@ -0,0 +1,304 @@
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from logging import debug
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from pathlib import Path
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from subprocess import PIPE
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from subprocess import Popen
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from tempfile import NamedTemporaryFile
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from typing import List
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from typing import Optional
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from typing import Set
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from libkeyringctl.keyring import export
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from libkeyringctl.keyring import get_fingerprints_from_paths
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from libkeyringctl.keyring import is_pgp_fingerprint
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from libkeyringctl.keyring import simplify_user_id
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from libkeyringctl.keyring import transform_fingerprint_to_keyring_path
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from libkeyringctl.keyring import transform_username_to_keyring_path
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from libkeyringctl.sequoia import packet_dump_field
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from libkeyringctl.sequoia import packet_kinds
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from libkeyringctl.types import Fingerprint
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from libkeyringctl.types import PacketKind
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from libkeyringctl.types import Uid
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from libkeyringctl.util import get_cert_paths
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from libkeyringctl.util import get_fingerprint_from_partial
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from libkeyringctl.util import system
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def verify( # noqa: ignore=C901
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working_dir: Path,
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keyring_root: Path,
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sources: Optional[List[Path]],
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lint_hokey: bool = True,
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lint_sq_keyring: bool = True,
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) -> None:
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"""Verify certificates against modern expectations using sq-keyring-linter and hokey
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Parameters
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----------
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working_dir: A directory to use for temporary files
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keyring_root: The keyring root directory to look up username shorthand sources
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sources: A list of username, fingerprint or directories from which to read PGP packet information
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(defaults to `keyring_root`)
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lint_hokey: Whether to run hokey lint
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lint_sq_keyring: Whether to run sq-keyring-linter
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"""
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if not sources:
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sources = [keyring_root]
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# transform shorthand paths to actual keyring paths
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transform_username_to_keyring_path(keyring_dir=keyring_root / "packager", paths=sources)
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transform_fingerprint_to_keyring_path(keyring_root=keyring_root, paths=sources)
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cert_paths: Set[Path] = get_cert_paths(sources)
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all_fingerprints = get_fingerprints_from_paths([keyring_root])
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for certificate in sorted(cert_paths):
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print(f"Verify {certificate.name} owned by {certificate.parent.name}")
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verify_integrity(certificate=certificate, all_fingerprints=all_fingerprints)
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with NamedTemporaryFile(
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dir=working_dir, prefix=f"{certificate.parent.name}-{certificate.name}", suffix=".asc"
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) as keyring:
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keyring_path = Path(keyring.name)
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export(
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working_dir=working_dir,
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keyring_root=keyring_root,
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sources=[certificate],
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output=keyring_path,
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)
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if lint_hokey:
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keyring_fd = Popen(("sq", "dearmor", f"{str(keyring_path)}"), stdout=PIPE)
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print(system(["hokey", "lint"], _stdin=keyring_fd.stdout), end="")
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if lint_sq_keyring:
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print(system(["sq-keyring-linter", f"{str(keyring_path)}"]), end="")
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def verify_integrity(certificate: Path, all_fingerprints: Set[Fingerprint]) -> None: # noqa: ignore=C901
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if not is_pgp_fingerprint(certificate.name):
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raise Exception(f"Unexpected certificate name for certificate {certificate.name}: {str(certificate)}")
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# check packet files
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for path in certificate.iterdir():
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if path.is_file():
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if path.name != f"{certificate.name}.asc":
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raise Exception(f"Unexpected file in certificate {certificate.name}: {str(path)}")
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kinds: List[PacketKind] = packet_kinds(packet=path)
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if not kinds or len(kinds) > 1:
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raise Exception(f"Unexpected amount of packets in file {str(path)}: {kinds}")
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kind = kinds[0]
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if kind != "Public-Key":
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raise Exception(f"Unexpected packet in file {str(path)}: {kind}")
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fingerprint = packet_dump_field(packet=path, field="Fingerprint")
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if fingerprint != certificate.name:
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raise Exception(f"Unexpected packet fingerprint in file {str(path)}: {fingerprint}")
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debug(f"OK: {path}")
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elif path.is_dir():
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# TODO: check direct key types, multiple
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if "certification" == path.name:
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for sig in path.iterdir():
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if not sig.is_file():
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raise Exception(f"Unexpected file type in certificate {certificate.name}: {str(sig)}")
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if not is_pgp_fingerprint(sig.stem):
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raise Exception(f"Unexpected file name in certificate {certificate.name}: {str(sig)}")
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if sig.suffix != ".asc":
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raise Exception(f"Unexpected file suffix in certificate {certificate.name}: {str(sig)}")
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kinds = packet_kinds(packet=sig)
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if not kinds:
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raise Exception(f"Unexpected amount of packets in file {str(sig)}: {kinds}")
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if any(filter(lambda kind: not kind == "Signature", kinds)):
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raise Exception(f"Unexpected packet in file {str(sig)}: {kinds}")
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debug(f"OK: {path}")
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elif "revocation" == path.name:
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for sig in path.iterdir():
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if not sig.is_file():
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raise Exception(f"Unexpected file type in certificate {certificate.name}: {str(sig)}")
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if not is_pgp_fingerprint(sig.stem):
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raise Exception(f"Unexpected file name in certificate {certificate.name}: {str(sig)}")
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if sig.suffix != ".asc":
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raise Exception(f"Unexpected file suffix in certificate {certificate.name}: {str(sig)}")
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kinds = packet_kinds(packet=sig)
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if not kinds or len(kinds) > 1:
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raise Exception(f"Unexpected amount of packets in file {str(sig)}: {kinds}")
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kind = kinds[0]
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if kind != "Signature":
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raise Exception(f"Unexpected packet in file {str(sig)}: {kind}")
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fingerprint = packet_dump_field(packet=sig, field="Issuer Fingerprint")
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if not fingerprint == sig.stem:
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raise Exception(f"Unexpected packet fingerprint in file {str(sig)}: {fingerprint}")
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sig_type = packet_dump_field(packet=sig, field="Type")
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if "KeyRevocation" != sig_type:
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raise Exception(f"Unexpected packet type in file {str(sig)}: {sig_type}")
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debug(f"OK: {sig}")
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elif "uid" == path.name:
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for uid in path.iterdir():
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if not uid.is_dir():
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raise Exception(f"Unexpected file type in certificate {certificate.name}: {str(uid)}")
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for uid_path in uid.iterdir():
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if uid_path.is_file():
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if uid_path.name != f"{uid.name}.asc":
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raise Exception(f"Unexpected file in certificate {certificate.name}: {str(uid_path)}")
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kinds = packet_kinds(packet=uid_path)
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if not kinds or len(kinds) > 1:
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raise Exception(f"Unexpected amount of packets in file {str(uid_path)}: {kinds}")
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kind = kinds[0]
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if kind != "User":
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raise Exception(f"Unexpected packet in file {str(uid_path)}: {kind}")
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uid_value = simplify_user_id(Uid(packet_dump_field(packet=uid_path, field="Value")))
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if uid_value != uid.name:
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raise Exception(f"Unexpected uid in file {str(uid_path)}: {uid_value}")
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elif not uid_path.is_dir():
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raise Exception(f"Unexpected file type in certificate {certificate.name}: {str(uid_path)}")
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elif "certification" == uid_path.name:
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for sig in uid_path.iterdir():
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if not sig.is_file():
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raise Exception(
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f"Unexpected file type in certificate {certificate.name}: {str(sig)}"
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)
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if not is_pgp_fingerprint(sig.stem):
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raise Exception(
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f"Unexpected file name in certificate {certificate.name}: {str(sig)}"
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)
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if sig.suffix != ".asc":
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raise Exception(
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f"Unexpected file suffix in certificate {certificate.name}: {str(sig)}"
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)
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kinds = packet_kinds(packet=sig)
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if not kinds or len(kinds) > 1:
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raise Exception(f"Unexpected amount of packets in file {str(sig)}: {kinds}")
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kind = kinds[0]
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if kind != "Signature":
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raise Exception(f"Unexpected packet in file {str(sig)}: {kind}")
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issuer = get_fingerprint_from_partial(
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fingerprints=all_fingerprints,
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fingerprint=Fingerprint(packet_dump_field(packet=sig, field="Issuer")),
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)
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if issuer != sig.stem:
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raise Exception(f"Unexpected issuer in file {str(sig)}: {issuer}")
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sig_type = packet_dump_field(packet=sig, field="Type")
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if not sig_type.endswith("Certification"):
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raise Exception(f"Unexpected packet type in file {str(sig)}: {sig_type}")
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debug(f"OK: {sig}")
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elif "revocation" == uid_path.name:
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for sig in uid_path.iterdir():
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if not sig.is_file():
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raise Exception(
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f"Unexpected file type in certificate {certificate.name}: {str(sig)}"
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)
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if not is_pgp_fingerprint(sig.stem):
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raise Exception(
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f"Unexpected file name in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
if sig.suffix != ".asc":
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file suffix in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
kinds = packet_kinds(packet=sig)
|
||||||
|
if not kinds or len(kinds) > 1:
|
||||||
|
raise Exception(f"Unexpected amount of packets in file {str(sig)}: {kinds}")
|
||||||
|
kind = kinds[0]
|
||||||
|
if kind != "Signature":
|
||||||
|
raise Exception(f"Unexpected packet in file {str(sig)}: {kind}")
|
||||||
|
issuer = get_fingerprint_from_partial(
|
||||||
|
fingerprints=all_fingerprints,
|
||||||
|
fingerprint=Fingerprint(packet_dump_field(packet=sig, field="Issuer")),
|
||||||
|
)
|
||||||
|
if issuer != sig.stem:
|
||||||
|
raise Exception(f"Unexpected issuer in file {str(sig)}: {issuer}")
|
||||||
|
sig_type = packet_dump_field(packet=sig, field="Type")
|
||||||
|
if sig_type != "CertificationRevocation":
|
||||||
|
raise Exception(f"Unexpected packet type in file {str(sig)}: {sig_type}")
|
||||||
|
debug(f"OK: {sig}")
|
||||||
|
else:
|
||||||
|
raise Exception(f"Unexpected directory in certificate {certificate.name}: {str(uid_path)}")
|
||||||
|
debug(f"OK: {uid_path}")
|
||||||
|
debug(f"OK: {uid}")
|
||||||
|
elif "subkey" == path.name:
|
||||||
|
for subkey in path.iterdir():
|
||||||
|
if not subkey.is_dir():
|
||||||
|
raise Exception(f"Unexpected file type in certificate {certificate.name}: {str(subkey)}")
|
||||||
|
if not is_pgp_fingerprint(subkey.name):
|
||||||
|
raise Exception(f"Unexpected file name in certificate {certificate.name}: {str(subkey)}")
|
||||||
|
for subkey_path in subkey.iterdir():
|
||||||
|
if subkey_path.is_file():
|
||||||
|
if subkey_path.name != f"{subkey.name}.asc":
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file in certificate {certificate.name}: {str(subkey_path)}"
|
||||||
|
)
|
||||||
|
kinds = packet_kinds(packet=subkey_path)
|
||||||
|
if not kinds or len(kinds) > 1:
|
||||||
|
raise Exception(f"Unexpected amount of packets in file {str(subkey_path)}: {kinds}")
|
||||||
|
kind = kinds[0]
|
||||||
|
if kind != "Public-Subkey":
|
||||||
|
raise Exception(f"Unexpected packet in file {str(subkey_path)}: {kind}")
|
||||||
|
fingerprint = packet_dump_field(packet=subkey_path, field="Fingerprint")
|
||||||
|
if fingerprint != subkey_path.stem:
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected packet fingerprint in file {str(subkey_path)}: {fingerprint}"
|
||||||
|
)
|
||||||
|
elif not subkey_path.is_dir():
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file type in certificate {certificate.name}: {str(subkey_path)}"
|
||||||
|
)
|
||||||
|
elif "certification" == subkey_path.name:
|
||||||
|
for sig in subkey_path.iterdir():
|
||||||
|
if not sig.is_file():
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file type in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
if not is_pgp_fingerprint(sig.stem):
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file name in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
if sig.suffix != ".asc":
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file suffix in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
kinds = packet_kinds(packet=sig)
|
||||||
|
if not kinds or len(kinds) > 1:
|
||||||
|
raise Exception(f"Unexpected amount of packets in file {str(sig)}: {kinds}")
|
||||||
|
kind = kinds[0]
|
||||||
|
if kind != "Signature":
|
||||||
|
raise Exception(f"Unexpected packet in file {str(sig)}: {kind}")
|
||||||
|
fingerprint = packet_dump_field(packet=sig, field="Issuer Fingerprint")
|
||||||
|
if fingerprint != certificate.name:
|
||||||
|
raise Exception(f"Unexpected packet fingerprint in file {str(sig)}: {fingerprint}")
|
||||||
|
sig_type = packet_dump_field(packet=sig, field="Type")
|
||||||
|
if sig_type != "SubkeyBinding":
|
||||||
|
raise Exception(f"Unexpected packet type in file {str(sig)}: {sig_type}")
|
||||||
|
elif "revocation" == subkey_path.name:
|
||||||
|
for sig in subkey_path.iterdir():
|
||||||
|
if not sig.is_file():
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file type in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
if not is_pgp_fingerprint(sig.stem):
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file name in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
if sig.suffix != ".asc":
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected file suffix in certificate {certificate.name}: {str(sig)}"
|
||||||
|
)
|
||||||
|
kinds = packet_kinds(packet=sig)
|
||||||
|
if not kinds or len(kinds) > 1:
|
||||||
|
raise Exception(f"Unexpected amount of packets in file {str(sig)}: {kinds}")
|
||||||
|
kind = kinds[0]
|
||||||
|
if kind != "Signature":
|
||||||
|
raise Exception(f"Unexpected packet in file {str(sig)}: {kind}")
|
||||||
|
fingerprint = packet_dump_field(packet=sig, field="Issuer Fingerprint")
|
||||||
|
if fingerprint != certificate.name:
|
||||||
|
raise Exception(f"Unexpected packet fingerprint in file {str(sig)}: {fingerprint}")
|
||||||
|
sig_type = packet_dump_field(packet=sig, field="Type")
|
||||||
|
if sig_type != "SubkeyRevocation":
|
||||||
|
raise Exception(f"Unexpected packet type in file {str(sig)}: {sig_type}")
|
||||||
|
else:
|
||||||
|
raise Exception(
|
||||||
|
f"Unexpected directory in certificate {certificate.name}: {str(subkey_path)}"
|
||||||
|
)
|
||||||
|
debug(f"OK: {subkey_path}")
|
||||||
|
else:
|
||||||
|
raise Exception(f"Unexpected directory in certificate {certificate.name}: {str(path)}")
|
||||||
|
else:
|
||||||
|
raise Exception(f"Unexpected file type in certificate {certificate.name}: {str(path)}")
|
||||||
Loading…
Reference in New Issue
Block a user