Files
id_configurator/tests/test_certificates.py
2026-10-24 00:02:40 +02:00

295 lines
11 KiB
Python

from id_configurator.config import Configuration
from id_configurator.context import Context
from id_configurator.modules.certificates import (
CertificatesModule,
_pem_name,
_resolve_target_dir,
)
CERT_CONTENT = "fake-cert-bytes"
def make_config(with_certificate: bool) -> Configuration:
data = {
"uuid": "12345678-1234-5678-1234-567812345678",
"organisation": "InterDiode",
}
if with_certificate:
data["configurations"] = {
"certificates": [{"name": "new-root-ca", "content": CERT_CONTENT}]
}
return Configuration.model_validate(data)
def test_is_relevant_true_when_certificates_configured(tmp_path) -> None:
context = Context(config=make_config(True), dst=tmp_path / "dst", src=None)
assert CertificatesModule().is_relevant(context) is True
def test_is_relevant_false_when_no_certificates(tmp_path) -> None:
context = Context(config=make_config(False), dst=tmp_path / "dst", src=None)
assert CertificatesModule().is_relevant(context) is False
def test_apply_writes_certificate_and_rebuilds_bundle(tmp_path) -> None:
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=None)
CertificatesModule().apply(context)
local_cert = dst / "usr/local/share/ca-certificates/new-root-ca.crt"
assert local_cert.read_bytes() == b"fake-cert-bytes"
bundle = dst / "etc/ssl/certs/ca-certificates.crt"
assert bundle.read_bytes() == b"fake-cert-bytes\n"
pem = dst / "etc/ssl/certs/new-root-ca.pem"
assert pem.is_symlink()
assert (
pem.readlink().as_posix() == "/usr/local/share/ca-certificates/new-root-ca.crt"
)
openssl_default = dst / "usr/lib/ssl/cert.pem"
assert openssl_default.is_symlink()
assert openssl_default.readlink().as_posix() == "/etc/ssl/certs/ca-certificates.crt"
def test_apply_sanitizes_certificate_name_with_slash(tmp_path) -> None:
data = {
"uuid": "12345678-1234-5678-1234-567812345678",
"organisation": "InterDiode",
"configurations": {
"certificates": [{"name": "../../evil", "content": CERT_CONTENT}]
},
}
dst = tmp_path / "dst"
context = Context(config=Configuration.model_validate(data), dst=dst, src=None)
CertificatesModule().apply(context)
local_cert = dst / "usr/local/share/ca-certificates/______evil.crt"
assert local_cert.read_bytes() == b"fake-cert-bytes"
# The "/" must never be interpreted as a path separator: without
# sanitizing, "../../evil" would have reshuffled the write up to
# usr/local/evil.crt instead of staying under ca-certificates/.
assert not (dst / "usr/local/evil.crt").exists()
def test_apply_merges_conf_listed_and_local_certificates(tmp_path) -> None:
src = tmp_path / "src"
local_certs_dir = src / "usr/local/share/ca-certificates"
local_certs_dir.mkdir(parents=True)
(local_certs_dir / "existing.crt").write_bytes(b"existing-bytes")
(local_certs_dir / "new-root-ca.crt").write_bytes(
b"stale-bytes-should-be-overwritten"
)
system_certs_dir = src / "usr/share/ca-certificates"
system_certs_dir.mkdir(parents=True)
# No trailing newline, to exercise the newline-normalization on append.
(system_certs_dir / "system-ca.crt").write_bytes(b"system-ca-bytes")
(src / "etc/ca-certificates.conf").parent.mkdir(parents=True, exist_ok=True)
(src / "etc/ca-certificates.conf").write_text(
"# a comment\n\n!disabled-ca.crt\nsystem-ca.crt\n", encoding="utf-8"
)
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=src)
CertificatesModule().apply(context)
local_dst = dst / "usr/local/share/ca-certificates"
assert (local_dst / "existing.crt").read_bytes() == b"existing-bytes"
assert (local_dst / "new-root-ca.crt").read_bytes() == b"fake-cert-bytes"
bundle = dst / "etc/ssl/certs/ca-certificates.crt"
# ca-certificates.conf entries first, then local certificates sorted by name.
assert bundle.read_bytes() == (
b"system-ca-bytes\nexisting-bytes\nfake-cert-bytes\n"
)
etc_certs = dst / "etc/ssl/certs"
assert (
etc_certs / "system-ca.pem"
).readlink().as_posix() == "/usr/share/ca-certificates/system-ca.crt"
assert (
etc_certs / "existing.pem"
).readlink().as_posix() == "/usr/local/share/ca-certificates/existing.crt"
assert (
etc_certs / "new-root-ca.pem"
).readlink().as_posix() == "/usr/local/share/ca-certificates/new-root-ca.crt"
# The disabled entry must not produce a symlink or appear in the bundle.
assert not (etc_certs / "disabled-ca.pem").exists()
def test_apply_warns_and_skips_missing_conf_entry(tmp_path, caplog) -> None:
src = tmp_path / "src"
(src / "usr/share/ca-certificates").mkdir(parents=True)
(src / "etc/ca-certificates.conf").parent.mkdir(parents=True, exist_ok=True)
(src / "etc/ca-certificates.conf").write_text("missing.crt\n", encoding="utf-8")
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=src)
with caplog.at_level("WARNING"):
CertificatesModule().apply(context)
assert "missing.crt" in caplog.text
bundle = dst / "etc/ssl/certs/ca-certificates.crt"
assert bundle.read_bytes() == b"fake-cert-bytes\n"
def test_pem_name_sanitizes_special_characters() -> None:
assert _pem_name("usr/share/ca-certificates/New Root, CA.crt") == "New_Root__CA.pem"
assert _pem_name("Vendor (Test).crt") == "Vendor_=Test=.pem"
def test_apply_skips_rhel_trust_store_when_absent(tmp_path) -> None:
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=None)
CertificatesModule().apply(context)
assert not (dst / "etc/pki").exists()
def test_apply_updates_rhel_trust_store_when_present(tmp_path) -> None:
src = tmp_path / "src"
anchors_dir = src / "etc/pki/ca-trust/source/anchors"
anchors_dir.mkdir(parents=True)
(anchors_dir / "existing-anchor.pem").write_bytes(b"existing-anchor-bytes")
(anchors_dir / "new-root-ca.crt").write_bytes(b"stale-should-be-overwritten")
extracted_bundle = src / "etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem"
extracted_bundle.parent.mkdir(parents=True)
# No trailing newline, to exercise the newline-normalization on append.
extracted_bundle.write_bytes(b"vendor-bundle-bytes")
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=src)
CertificatesModule().apply(context)
anchors_dst = dst / "etc/pki/ca-trust/source/anchors"
assert (
anchors_dst / "existing-anchor.pem"
).read_bytes() == b"existing-anchor-bytes"
assert (anchors_dst / "new-root-ca.crt").read_bytes() == b"fake-cert-bytes"
bundle_dst = dst / "etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem"
assert bundle_dst.read_bytes() == (
b"vendor-bundle-bytes\nexisting-anchor-bytes\nfake-cert-bytes\n"
)
def test_apply_rebuilds_rhel_trust_store_without_preexisting_bundle(tmp_path) -> None:
src = tmp_path / "src"
(src / "etc/pki/ca-trust/source/anchors").mkdir(parents=True)
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=src)
CertificatesModule().apply(context)
bundle_dst = dst / "etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem"
assert bundle_dst.read_bytes() == b"fake-cert-bytes\n"
def test_resolve_target_dir_returns_unchanged_when_not_a_symlink(tmp_path) -> None:
src = tmp_path / "src"
(src / "etc/ssl/certs").mkdir(parents=True)
context = Context(config=make_config(True), dst=tmp_path / "dst", src=src)
assert _resolve_target_dir(context, "etc/ssl/certs") == "etc/ssl/certs"
def test_resolve_target_dir_returns_unchanged_without_src(tmp_path) -> None:
context = Context(config=make_config(True), dst=tmp_path / "dst", src=None)
assert _resolve_target_dir(context, "etc/ssl/certs") == "etc/ssl/certs"
def test_resolve_target_dir_follows_absolute_symlink(tmp_path) -> None:
src = tmp_path / "src"
(src / "etc/pki/tls/certs").mkdir(parents=True)
(src / "etc/ssl").mkdir(parents=True)
(src / "etc/ssl/certs").symlink_to("/etc/pki/tls/certs")
context = Context(config=make_config(True), dst=tmp_path / "dst", src=src)
assert _resolve_target_dir(context, "etc/ssl/certs") == "etc/pki/tls/certs"
def test_resolve_target_dir_follows_relative_symlink(tmp_path) -> None:
src = tmp_path / "src"
(src / "etc/pki/tls/certs").mkdir(parents=True)
(src / "etc/ssl").mkdir(parents=True)
(src / "etc/ssl/certs").symlink_to("../pki/tls/certs")
context = Context(config=make_config(True), dst=tmp_path / "dst", src=src)
assert _resolve_target_dir(context, "etc/ssl/certs") == "etc/pki/tls/certs"
def test_resolve_target_dir_falls_back_when_relative_symlink_escapes_src(
tmp_path,
) -> None:
src = tmp_path / "src"
(src / "etc/ssl").mkdir(parents=True)
# Escapes past <src> itself via enough ".." components.
(src / "etc/ssl/certs").symlink_to("../../../../../outside")
context = Context(config=make_config(True), dst=tmp_path / "dst", src=src)
assert _resolve_target_dir(context, "etc/ssl/certs") == "etc/ssl/certs"
def test_apply_writes_bundle_to_rhel_style_symlinked_etccertsdir(tmp_path) -> None:
src = tmp_path / "src"
(src / "etc/pki/tls/certs").mkdir(parents=True)
(src / "etc/ssl").mkdir(parents=True)
(src / "etc/ssl/certs").symlink_to("/etc/pki/tls/certs")
dst = tmp_path / "dst"
context = Context(config=make_config(True), dst=dst, src=src)
CertificatesModule().apply(context)
assert not (dst / "etc/ssl/certs").exists()
bundle = dst / "etc/pki/tls/certs/ca-certificates.crt"
assert bundle.read_bytes() == b"fake-cert-bytes\n"
pem = dst / "etc/pki/tls/certs/new-root-ca.pem"
assert pem.is_symlink()
# /usr/lib/ssl/cert.pem is Debian/Ubuntu-specific: not OpenSSL's default
# CAfile on this (RHEL-style) system, so it must not be created.
assert not (dst / "usr/lib/ssl/cert.pem").exists()
def test_apply_is_idempotent_when_src_and_dst_are_the_same_live_root(
tmp_path,
) -> None:
# Regression test: applying directly to a live root (--src / --dst /,
# as the Ansible role does) where /usr/lib/ssl/cert.pem already exists
# (as it would on any host with ca-certificates already installed) must
# not resolve that pre-existing symlink away when recreating it - doing
# so would unlink/replace the bundle it points to instead, corrupting it
# into a symlink to itself and breaking every subsequent run.
root = tmp_path / "root"
etc_ssl_certs = root / "etc/ssl/certs"
etc_ssl_certs.mkdir(parents=True)
(etc_ssl_certs / "ca-certificates.crt").write_bytes(b"preexisting-bundle-bytes")
usr_lib_ssl = root / "usr/lib/ssl"
usr_lib_ssl.mkdir(parents=True)
(usr_lib_ssl / "cert.pem").symlink_to("/etc/ssl/certs/ca-certificates.crt")
context = Context(config=make_config(True), dst=root, src=root)
for _ in range(2):
CertificatesModule().apply(context)
bundle = etc_ssl_certs / "ca-certificates.crt"
assert not bundle.is_symlink()
assert bundle.read_bytes() == b"fake-cert-bytes\n"
openssl_default = usr_lib_ssl / "cert.pem"
assert openssl_default.is_symlink()
assert (
openssl_default.readlink().as_posix()
== "/etc/ssl/certs/ca-certificates.crt"
)