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#!/usr/bin/python3
import codecs
import hashlib
import io
import json
import os.path
import re
import ssl
import subprocess
import sys
from debian_linux.config import ConfigCoreDump
from debian_linux.debian import VersionLinux
from debian_linux.gencontrol import Gencontrol as Base, merge_packages
from debian_linux.utils import Templates, read_control
class Gencontrol(Base):
def __init__(self, arch):
super(Gencontrol, self).__init__(
ConfigCoreDump(fp=open('debian/config.defines.dump', 'rb')),
Templates(['debian/signing_templates', 'debian/templates']))
image_binary_version = self.changelog[0].version.complete
config_entry = self.config[('version',)]
self.version = VersionLinux(config_entry['source'])
# Check config version matches changelog version
assert self.version.complete == re.sub(r'\+b\d+$', r'',
image_binary_version)
self.abiname = config_entry['abiname']
self.vars = {
'template': 'linux-image-%s-signed-template' % arch,
'upstreamversion': self.version.linux_upstream,
'version': self.version.linux_version,
'source_upstream': self.version.upstream,
'abiname': self.abiname,
'imagebinaryversion': image_binary_version,
'imagesourceversion': self.version.complete,
'arch': arch,
}
self.package_dir = 'debian/%(template)s' % self.vars
self.template_top_dir = (self.package_dir
+ '/usr/share/code-signing/%(template)s'
% self.vars)
self.template_debian_dir = (self.template_top_dir
+ '/source-template/debian')
os.makedirs(self.template_debian_dir, exist_ok=True)
self.image_packages = []
def _substitute_file(self, template, vars, target, append=False):
with codecs.open(target, 'a' if append else 'w', 'utf-8') as f:
f.write(self.substitute(self.templates[template], vars))
def do_main_setup(self, vars, makeflags, extra):
makeflags['VERSION'] = self.version.linux_version
makeflags['GENCONTROL_ARGS'] = (
'-v%(imagebinaryversion)s '
'-DBuilt-Using="linux (= %(imagesourceversion)s)"' %
vars)
makeflags['PACKAGE_VERSION'] = vars['imagebinaryversion']
self.installer_packages = {}
if os.getenv('DEBIAN_KERNEL_DISABLE_INSTALLER'):
if self.changelog[0].distribution == 'UNRELEASED':
import warnings
warnings.warn('Disable installer modules on request '
'(DEBIAN_KERNEL_DISABLE_INSTALLER set)')
else:
raise RuntimeError(
'Unable to disable installer modules in release build '
'(DEBIAN_KERNEL_DISABLE_INSTALLER set)')
elif self.config.merge('packages').get('installer', True):
# Add udebs using kernel-wedge
kw_env = os.environ.copy()
kw_env['KW_DEFCONFIG_DIR'] = 'debian/installer'
kw_env['KW_CONFIG_DIR'] = 'debian/installer'
kw_proc = subprocess.Popen(
['kernel-wedge', 'gen-control', vars['abiname']],
stdout=subprocess.PIPE,
env=kw_env)
if not isinstance(kw_proc.stdout, io.IOBase):
udeb_packages = read_control(io.open(kw_proc.stdout.fileno(),
closefd=False))
else:
udeb_packages = read_control(io.TextIOWrapper(kw_proc.stdout))
kw_proc.wait()
if kw_proc.returncode != 0:
raise RuntimeError('kernel-wedge exited with code %d' %
kw_proc.returncode)
for package in udeb_packages:
for arch in package['Architecture']:
if self.config.merge('build', arch) \
.get('signed-code', False):
self.installer_packages.setdefault(arch, []) \
.append(package)
def do_main_packages(self, packages, vars, makeflags, extra):
# Assume that arch:all packages do not get binNMU'd
packages['source']['Build-Depends'].append(
'linux-support-%(abiname)s (= %(imagesourceversion)s)' % vars)
def do_main_recurse(self, packages, makefile, vars, makeflags, extra):
# Each signed source package only covers a single architecture
self.do_arch(packages, makefile, self.vars['arch'], vars.copy(),
makeflags.copy(), extra)
def do_extra(self, packages, makefile):
pass
def do_arch_setup(self, vars, makeflags, arch, extra):
super(Gencontrol, self).do_main_setup(vars, makeflags, extra)
if self.version.linux_modifier is None:
abiname_part = '-%s' % self.config.merge('abi', arch)['abiname']
else:
abiname_part = ''
makeflags['ABINAME'] = vars['abiname'] = \
self.config['version', ]['abiname_base'] + abiname_part
def do_arch_packages(self, packages, makefile, arch, vars, makeflags,
extra):
udeb_packages = self.installer_packages.get(arch, [])
if udeb_packages:
merge_packages(packages, udeb_packages, arch)
# These packages must be built after the per-flavour/
# per-featureset packages. Also, this won't work
# correctly with an empty package list.
if udeb_packages:
makefile.add(
'binary-arch_%s' % arch,
cmds=["$(MAKE) -f debian/rules.real install-udeb_%s %s "
"PACKAGE_NAMES='%s'" %
(arch, makeflags,
' '.join(p['Package'] for p in udeb_packages))])
def do_flavour_setup(self, vars, makeflags, arch, featureset, flavour,
extra):
super(Gencontrol, self).do_flavour_setup(vars, makeflags, arch,
featureset, flavour, extra)
config_image = self.config.merge('image', arch, featureset, flavour)
vars['image-stem'] = config_image.get('install-stem')
makeflags['IMAGE_INSTALL_STEM'] = vars['image-stem']
def do_flavour_packages(self, packages, makefile, arch, featureset,
flavour, vars, makeflags, extra):
if not (self.config.merge('build', arch, featureset, flavour)
.get('signed-code', False)):
return
image_suffix = '%(abiname)s%(localversion)s' % vars
image_package_name = 'linux-image-%s-unsigned' % image_suffix
# Verify that this flavour is configured to support Secure Boot,
# and get the trusted certificates filename.
with open('debian/%s/boot/config-%s' %
(image_package_name, image_suffix)) as f:
kconfig = f.readlines()
assert 'CONFIG_EFI_STUB=y\n' in kconfig
assert 'CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT=y\n' in kconfig
cert_re = re.compile(r'CONFIG_SYSTEM_TRUSTED_KEYS="(.*)"$')
cert_file_name = None
for line in kconfig:
match = cert_re.match(line)
if match:
cert_file_name = match.group(1)
break
assert cert_file_name
if featureset != "none":
cert_file_name = os.path.join('debian/build/source_%s' %
featureset,
cert_file_name)
self.image_packages.append((image_suffix, image_package_name,
cert_file_name))
packages['source']['Build-Depends'].append(
image_package_name
+ ' (= %(imagebinaryversion)s) [%(arch)s]' % vars)
packages_signed = self.process_packages(
self.templates['control.image'], vars)
merge_packages(packages, packages_signed, arch)
cmds_binary_arch = []
for i in packages_signed:
cmds_binary_arch += ["$(MAKE) -f debian/rules.real install-signed "
"PACKAGE_NAME='%s' %s" %
(i['Package'], makeflags)]
makefile.add('binary-arch_%s_%s_%s_real' % (arch, featureset, flavour),
cmds=cmds_binary_arch)
os.makedirs(self.package_dir + '/usr/share/lintian/overrides', 0o755,
exist_ok=True)
with open(self.package_dir
+ '/usr/share/lintian/overrides/%(template)s' % self.vars,
'a') as lintian_overrides:
for script_base in ['postinst', 'postrm', 'preinst', 'prerm']:
script_name = (self.template_debian_dir
+ '/linux-image-%s%s.%s'
% (vars['abiname'], vars['localversion'],
script_base))
self._substitute_file('image.%s' % script_base, vars,
script_name)
lintian_overrides.write('%s: script-not-executable %s\n' %
(self.vars['template'],
os.path.relpath(script_name,
self.package_dir)))
def write(self, packages, makefile):
self.write_changelog()
self.write_control(packages.values(),
name=(self.template_debian_dir + '/control'))
self.write_makefile(makefile,
name=(self.template_debian_dir + '/rules.gen'))
self.write_files_json()
def write_changelog(self):
# We need to insert a new version entry.
# Take the distribution and urgency from the linux changelog, and
# the base version from the changelog template.
vars = self.vars.copy()
vars['source'] = self.changelog[0].source
vars['distribution'] = self.changelog[0].distribution
vars['urgency'] = self.changelog[0].urgency
vars['signedsourceversion'] = (re.sub(r'-', r'+',
vars['imagebinaryversion']))
with codecs.open(self.template_debian_dir + '/changelog', 'w',
'utf-8') as f:
f.write(self.substitute('''\
linux-signed-@arch@ (@signedsourceversion@) @distribution@; urgency=@urgency@
* Sign kernel from @source@ @imagebinaryversion@
''',
vars))
with codecs.open('debian/changelog', 'r', 'utf-8') as changelog_in:
# Ignore first two header lines
changelog_in.readline()
changelog_in.readline()
for d in changelog_in.read():
f.write(d)
def write_files_json(self):
# Can't raise from a lambda function :-(
def raise_func(e):
raise e
# Some functions in openssl work with multiple concatenated
# PEM-format certificates, but others do not.
def get_certs(file_name):
certs = []
BEGIN, MIDDLE = 0, 1
state = BEGIN
with open(file_name) as f:
for line in f:
if line == '-----BEGIN CERTIFICATE-----\n':
assert state == BEGIN
certs.append([])
state = MIDDLE
elif line == '-----END CERTIFICATE-----\n':
assert state == MIDDLE
state = BEGIN
else:
assert line[0] != '-'
assert state == MIDDLE
certs[-1].append(line)
assert state == BEGIN
return [''.join(cert_lines) for cert_lines in certs]
def get_cert_fingerprint(cert, algo):
hasher = hashlib.new(algo)
hasher.update(ssl.PEM_cert_to_DER_cert(cert))
return hasher.hexdigest()
all_files = {'packages': {}}
for image_suffix, image_package_name, cert_file_name in \
self.image_packages:
package_dir = 'debian/%s' % image_package_name
package_files = []
package_modules = []
package_files.append({'sig_type': 'efi',
'file': 'boot/vmlinuz-%s' % image_suffix})
for root, dirs, files in os.walk('%s/lib/modules' % package_dir,
onerror=raise_func):
for name in files:
if name.endswith('.ko'):
package_modules.append(
'%s/%s' %
(root[(len(package_dir) + 1):], name))
package_modules.sort()
for module in package_modules:
package_files.append(
{'sig_type': 'linux-module',
'file': module})
package_certs = [get_cert_fingerprint(cert, 'sha256')
for cert in get_certs(cert_file_name)]
assert len(package_certs) >= 1
all_files['packages'][image_package_name] = {
'trusted_certs': package_certs,
'files': package_files
}
with codecs.open(self.template_top_dir + '/files.json', 'w') as f:
json.dump(all_files, f)
if __name__ == '__main__':
Gencontrol(sys.argv[1])()
|
