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From b836b65caa9112262bb479a4a9ab33856a422c3e Mon Sep 17 00:00:00 2001
From: Matej Tyc <matyc@redhat.com>
Date: Fri, 14 Jan 2022 17:24:00 +0100
Subject: [PATCH] Add support for the firstboot remediation
OpenSCAP can support a new remediation type -
a classical scan + remediate that is executed during the first boot.
This PR adds support for this functionality,
and allows to control it via a remediate kickstart property.
---
org_fedora_oscap/common.py | 41 ++++++++++++++++++++
org_fedora_oscap/service/installation.py | 49 +++++++++++++++++++++++-
org_fedora_oscap/service/kickstart.py | 8 ++++
org_fedora_oscap/service/oscap.py | 42 ++++++++++++--------
org_fedora_oscap/structures.py | 14 +++++++
tests/test_interface.py | 6 ++-
6 files changed, 140 insertions(+), 20 deletions(-)
diff --git a/org_fedora_oscap/common.py b/org_fedora_oscap/common.py
index eeb27fc..08df723 100644
--- a/org_fedora_oscap/common.py
+++ b/org_fedora_oscap/common.py
@@ -29,6 +29,7 @@
import subprocess
import zipfile
import tarfile
+import textwrap
import re
import logging
@@ -341,6 +342,46 @@ def run_oscap_remediate(profile, fpath, ds_id="", xccdf_id="", tailoring="",
return proc.stdout
+def _schedule_firstboot_remediation(
+ chroot, profile, ds_path, results_path, report_path, ds_id, xccdf_id, tailoring_path):
+ config = textwrap.dedent(f"""\
+ OSCAP_REMEDIATE_DS='{ds_path}'
+ OSCAP_REMEDIATE_PROFILE_ID='{profile}'
+ OSCAP_REMEDIATE_ARF_RESULT='{results_path}'
+ OSCAP_REMEDIATE_HTML_REPORT='{report_path}'
+ """)
+ if ds_id:
+ config += "OSCAP_REMEDIATE_DATASTREAM_ID='{ds_id}'\n"
+ if xccdf_id:
+ config += "OSCAP_REMEDIATE_XCCDF_ID='{xccdf_id}'\n"
+ if tailoring_path:
+ config += "OSCAP_REMEDIATE_TAILORING='{tailoring_path}'\n"
+
+ relative_filename = "var/tmp/oscap-remediate-offline.conf.sh"
+ local_config_filename = f"/{relative_filename}"
+ chroot_config_filename = os.path.join(chroot, relative_filename)
+ with open(chroot_config_filename, "w") as f:
+ f.write(config)
+ os.symlink(local_config_filename,
+ os.path.join(chroot, "system-update"))
+
+
+def schedule_firstboot_remediation(chroot, profile, fpath, ds_id="", xccdf_id="", tailoring=""):
+ if not profile:
+ return ""
+
+ # make sure the directory for the results exists
+ results_dir = os.path.dirname(RESULTS_PATH)
+ results_dir = os.path.normpath(chroot + "/" + results_dir)
+ utils.ensure_dir_exists(results_dir)
+
+ log.info("OSCAP addon: Scheduling firstboot remediation")
+ _schedule_firstboot_remediation(
+ chroot, profile, fpath, RESULTS_PATH, REPORT_PATH, ds_id, xccdf_id, tailoring)
+
+ return ""
+
+
def extract_data(archive, out_dir, ensure_has_files=None):
"""
Fuction that extracts the given archive to the given output directory. It
diff --git a/org_fedora_oscap/service/installation.py b/org_fedora_oscap/service/installation.py
index 290da40..d79cce9 100644
--- a/org_fedora_oscap/service/installation.py
+++ b/org_fedora_oscap/service/installation.py
@@ -31,7 +31,8 @@
log = logging.getLogger("anaconda")
-REQUIRED_PACKAGES = ("openscap", "openscap-scanner",)
+# scanner is useful for the post remediation, utils for the firstboot remediation
+REQUIRED_PACKAGES = ("openscap", "openscap-scanner", "openscap-utils",)
def _handle_error(exception):
@@ -263,3 +264,49 @@ def run(self):
msg = _(f"Something went wrong during the final hardening: {str(exc)}.")
terminate(msg)
return
+
+
+class ScheduleFirstbootRemediationTask(Task):
+ """The installation task for running the remediation."""
+
+ def __init__(self, sysroot, policy_data, target_content_path,
+ target_tailoring_path):
+ """Create a task."""
+ super().__init__()
+ self._sysroot = sysroot
+ self._policy_data = policy_data
+ self._target_content_path = target_content_path
+ self._target_tailoring_path = target_tailoring_path
+
+ @property
+ def name(self):
+ return "Schedule first-boot remediation"
+
+ def run(self):
+ """Run the task."""
+ try:
+ common.assert_scanner_works(
+ chroot=self._sysroot, executable="oscap")
+ except Exception as exc:
+ msg_lines = [_(
+ "The 'oscap' scanner doesn't work in the installed system: {error}"
+ .format(error=str(exc)))]
+ msg_lines.append(_("As a result, the installed system can't be hardened."))
+ terminate("\n".join(msg_lines))
+ return
+
+ try:
+ common.schedule_firstboot_remediation(
+ self._sysroot,
+ self._policy_data.profile_id,
+ self._target_content_path,
+ self._policy_data.datastream_id,
+ self._policy_data.xccdf_id,
+ self._target_tailoring_path,
+ )
+ except Exception as exc:
+ msg = _(
+ "Something went wrong when scheduling the first-boot remediation: {exc}."
+ .format(exc=str(exc)))
+ terminate(msg)
+ return
diff --git a/org_fedora_oscap/service/kickstart.py b/org_fedora_oscap/service/kickstart.py
index dc1a100..3a762d7 100644
--- a/org_fedora_oscap/service/kickstart.py
+++ b/org_fedora_oscap/service/kickstart.py
@@ -76,6 +76,7 @@ def handle_line(self, line, line_number=None):
"tailoring-path": self._parse_tailoring_path,
"fingerprint": self._parse_fingerprint,
"certificates": self._parse_certificates,
+ "remediate": self._parse_remediate,
}
line = line.strip()
@@ -145,6 +146,10 @@ def _parse_fingerprint(self, value):
def _parse_certificates(self, value):
self.policy_data.certificates = value
+ def _parse_remediate(self, value):
+ assert value in ("none", "post", "firstboot", "both")
+ self.policy_data.remediate = value
+
def handle_end(self):
"""Handle the end of the section."""
tmpl = "%s missing for the %s addon"
@@ -235,6 +240,9 @@ def __str__(self):
if self.policy_data.certificates:
ret += "\n%s" % key_value_pair("certificates", self.policy_data.certificates)
+ if self.policy_data.remediate:
+ ret += "\n%s" % key_value_pair("remediate", self.policy_data.remediate)
+
ret += "\n%end\n\n"
return ret
diff --git a/org_fedora_oscap/service/oscap.py b/org_fedora_oscap/service/oscap.py
index 65da08b..c54135b 100755
--- a/org_fedora_oscap/service/oscap.py
+++ b/org_fedora_oscap/service/oscap.py
@@ -29,7 +29,7 @@
from org_fedora_oscap import common
from org_fedora_oscap.constants import OSCAP
from org_fedora_oscap.service.installation import PrepareValidContent, \
- EvaluateRulesTask, InstallContentTask, RemediateSystemTask
+ EvaluateRulesTask, InstallContentTask, RemediateSystemTask, ScheduleFirstbootRemediationTask
from org_fedora_oscap.service.kickstart import OSCAPKickstartSpecification, KickstartParseError
from org_fedora_oscap.service.oscap_interface import OSCAPInterface
from org_fedora_oscap.structures import PolicyData
@@ -208,22 +208,30 @@ def install_with_tasks(self):
log.debug("OSCAP Addon: The installation is disabled. Skip the installation.")
return []
- tasks = [
- InstallContentTask(
- sysroot=conf.target.system_root,
- policy_data=self.policy_data,
- file_path=common.get_raw_preinst_content_path(self.policy_data),
- content_path=common.get_preinst_content_path(self.policy_data),
- tailoring_path=common.get_preinst_tailoring_path(self.policy_data),
- target_directory=common.TARGET_CONTENT_DIR,
- ),
- RemediateSystemTask(
- sysroot=conf.target.system_root,
- policy_data=self.policy_data,
- target_content_path=common.get_postinst_content_path(self.policy_data),
- target_tailoring_path=common.get_postinst_tailoring_path(self.policy_data)
- )
- ]
+ tasks = []
+ tasks.append(InstallContentTask(
+ sysroot=conf.target.system_root,
+ policy_data=self.policy_data,
+ file_path=common.get_raw_preinst_content_path(self.policy_data),
+ content_path=common.get_preinst_content_path(self.policy_data),
+ tailoring_path=common.get_preinst_tailoring_path(self.policy_data),
+ target_directory=common.TARGET_CONTENT_DIR
+ ))
+ if self.policy_data.remediate in ("", "post", "both"):
+ tasks.append(RemediateSystemTask(
+ sysroot=conf.target.system_root,
+ policy_data=self.policy_data,
+ target_content_path=common.get_postinst_content_path(self.policy_data),
+ target_tailoring_path=common.get_postinst_tailoring_path(self.policy_data)
+ ))
+
+ if self.policy_data.remediate in ("", "firstboot", "both"):
+ tasks.append(ScheduleFirstbootRemediationTask(
+ sysroot=conf.target.system_root,
+ policy_data=self.policy_data,
+ target_content_path=common.get_postinst_content_path(self.policy_data),
+ target_tailoring_path=common.get_postinst_tailoring_path(self.policy_data)
+ ))
self._cancel_tasks_on_error(tasks)
return tasks
diff --git a/org_fedora_oscap/structures.py b/org_fedora_oscap/structures.py
index 03c71b4..644836e 100644
--- a/org_fedora_oscap/structures.py
+++ b/org_fedora_oscap/structures.py
@@ -36,6 +36,7 @@ def __init__(self):
self._tailoring_path = ""
self._fingerprint = ""
self._certificates = ""
+ self._remediate = ""
def update_from(self, rhs):
self._content_type = rhs._content_type
@@ -48,6 +49,7 @@ def update_from(self, rhs):
self._tailoring_path = rhs._tailoring_path
self._fingerprint = rhs._fingerprint
self._certificates = rhs._certificates
+ self._remediate = rhs._remediate
@property
def content_type(self) -> Str:
@@ -190,3 +192,15 @@ def certificates(self) -> Str:
@certificates.setter
def certificates(self, value: Str):
self._certificates = value
+
+ @property
+ def remediate(self) -> Str:
+ """What remediations to perform
+
+ :return: a remediation mode
+ """
+ return self._remediate
+
+ @remediate.setter
+ def remediate(self, value: Str):
+ self._remediate = value
diff --git a/tests/test_interface.py b/tests/test_interface.py
index 395071f..daa1de1 100644
--- a/tests/test_interface.py
+++ b/tests/test_interface.py
@@ -85,7 +85,8 @@ def test_policy_data(interface: OSCAPInterface, callback):
"cpe-path": get_variant(Str, "/usr/share/oscap/cpe.xml"),
"tailoring-path": get_variant(Str, "/usr/share/oscap/tailoring.xml"),
"fingerprint": get_variant(Str, "240f2f18222faa98856c3b4fc50c4195"),
- "certificates": get_variant(Str, "/usr/share/oscap/cacert.pem")
+ "certificates": get_variant(Str, "/usr/share/oscap/cacert.pem"),
+ "remediate": get_variant(Str, "both"),
}
interface.PolicyData = policy_structure
@@ -178,11 +179,12 @@ def test_install_with_tasks(service: OSCAPService, interface: OSCAPInterface):
service.policy_data = data
object_paths = interface.InstallWithTasks()
- assert len(object_paths) == 2
+ assert len(object_paths) == 3
tasks = TaskContainer.from_object_path_list(object_paths)
assert isinstance(tasks[0], installation.InstallContentTask)
assert isinstance(tasks[1], installation.RemediateSystemTask)
+ assert isinstance(tasks[2], installation.ScheduleFirstbootRemediationTask)
def test_cancel_tasks(service: OSCAPService):
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