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f4780cbe | 1 | #!/usr/bin/env python3 |
eb81a60c | 2 | # SPDX-License-Identifier: LGPL-2.1-or-later |
d9c8f075 ZJS |
3 | # |
4 | # This file is part of systemd. | |
5 | # | |
6 | # systemd is free software; you can redistribute it and/or modify it | |
7 | # under the terms of the GNU Lesser General Public License as published by | |
8 | # the Free Software Foundation; either version 2.1 of the License, or | |
9 | # (at your option) any later version. | |
10 | # | |
11 | # systemd is distributed in the hope that it will be useful, but | |
12 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | # General Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU Lesser General Public License | |
17 | # along with systemd; If not, see <https://www.gnu.org/licenses/>. | |
f4780cbe ZJS |
18 | |
19 | # pylint: disable=missing-docstring,invalid-name,import-outside-toplevel | |
20 | # pylint: disable=consider-using-with,unspecified-encoding,line-too-long | |
21 | # pylint: disable=too-many-locals,too-many-statements,too-many-return-statements | |
c4fc2546 ZJS |
22 | # pylint: disable=too-many-branches,too-many-lines,too-many-instance-attributes |
23 | # pylint: disable=too-many-arguments,unnecessary-lambda-assignment,fixme | |
24 | # pylint: disable=unused-argument | |
f4780cbe ZJS |
25 | |
26 | import argparse | |
5143a47a | 27 | import configparser |
f4780cbe ZJS |
28 | import collections |
29 | import dataclasses | |
30 | import fnmatch | |
31 | import itertools | |
32 | import json | |
33 | import os | |
34 | import pathlib | |
5143a47a | 35 | import pprint |
f4780cbe ZJS |
36 | import re |
37 | import shlex | |
c8add4c2 | 38 | import shutil |
f4780cbe | 39 | import subprocess |
5143a47a | 40 | import sys |
f4780cbe | 41 | import tempfile |
a758f95c ZJS |
42 | from typing import (Any, |
43 | Callable, | |
44 | IO, | |
45 | Optional, | |
46 | Union) | |
f4780cbe | 47 | |
a758f95c | 48 | import pefile # type: ignore |
f4780cbe | 49 | |
67b65ac6 | 50 | __version__ = '{{PROJECT_VERSION}} ({{GIT_VERSION}})' |
30ec2eae | 51 | |
f4780cbe | 52 | EFI_ARCH_MAP = { |
7081db29 ZJS |
53 | # host_arch glob : [efi_arch, 32_bit_efi_arch if mixed mode is supported] |
54 | 'x86_64' : ['x64', 'ia32'], | |
55 | 'i[3456]86' : ['ia32'], | |
56 | 'aarch64' : ['aa64'], | |
57 | 'arm[45678]*l' : ['arm'], | |
58 | 'loongarch32' : ['loongarch32'], | |
59 | 'loongarch64' : ['loongarch64'], | |
60 | 'riscv32' : ['riscv32'], | |
61 | 'riscv64' : ['riscv64'], | |
f4780cbe ZJS |
62 | } |
63 | EFI_ARCHES: list[str] = sum(EFI_ARCH_MAP.values(), []) | |
64 | ||
65 | def guess_efi_arch(): | |
66 | arch = os.uname().machine | |
67 | ||
68 | for glob, mapping in EFI_ARCH_MAP.items(): | |
69 | if fnmatch.fnmatch(arch, glob): | |
70 | efi_arch, *fallback = mapping | |
71 | break | |
72 | else: | |
73 | raise ValueError(f'Unsupported architecture {arch}') | |
74 | ||
75 | # This makes sense only on some architectures, but it also probably doesn't | |
76 | # hurt on others, so let's just apply the check everywhere. | |
77 | if fallback: | |
78 | fw_platform_size = pathlib.Path('/sys/firmware/efi/fw_platform_size') | |
79 | try: | |
80 | size = fw_platform_size.read_text().strip() | |
81 | except FileNotFoundError: | |
82 | pass | |
83 | else: | |
84 | if int(size) == 32: | |
85 | efi_arch = fallback[0] | |
86 | ||
87 | print(f'Host arch {arch!r}, EFI arch {efi_arch!r}') | |
88 | return efi_arch | |
89 | ||
90 | ||
91 | def shell_join(cmd): | |
92 | # TODO: drop in favour of shlex.join once shlex.join supports pathlib.Path. | |
93 | return ' '.join(shlex.quote(str(x)) for x in cmd) | |
94 | ||
95 | ||
f4780cbe ZJS |
96 | def round_up(x, blocksize=4096): |
97 | return (x + blocksize - 1) // blocksize * blocksize | |
98 | ||
99 | ||
667578bb ZJS |
100 | def try_import(modname, name=None): |
101 | try: | |
102 | return __import__(modname) | |
103 | except ImportError as e: | |
104 | raise ValueError(f'Kernel is compressed with {name or modname}, but module unavailable') from e | |
105 | ||
106 | ||
483c9c1b ZJS |
107 | def maybe_decompress(filename): |
108 | """Decompress file if compressed. Return contents.""" | |
109 | f = open(filename, 'rb') | |
110 | start = f.read(4) | |
111 | f.seek(0) | |
112 | ||
113 | if start.startswith(b'\x7fELF'): | |
114 | # not compressed | |
115 | return f.read() | |
116 | ||
bf9f07a6 TP |
117 | if start.startswith(b'MZ'): |
118 | # not compressed aarch64 and riscv64 | |
119 | return f.read() | |
120 | ||
483c9c1b | 121 | if start.startswith(b'\x1f\x8b'): |
667578bb | 122 | gzip = try_import('gzip') |
483c9c1b ZJS |
123 | return gzip.open(f).read() |
124 | ||
125 | if start.startswith(b'\x28\xb5\x2f\xfd'): | |
667578bb | 126 | zstd = try_import('zstd') |
483c9c1b ZJS |
127 | return zstd.uncompress(f.read()) |
128 | ||
129 | if start.startswith(b'\x02\x21\x4c\x18'): | |
667578bb | 130 | lz4 = try_import('lz4.frame', 'lz4') |
483c9c1b ZJS |
131 | return lz4.frame.decompress(f.read()) |
132 | ||
133 | if start.startswith(b'\x04\x22\x4d\x18'): | |
134 | print('Newer lz4 stream format detected! This may not boot!') | |
667578bb | 135 | lz4 = try_import('lz4.frame', 'lz4') |
483c9c1b ZJS |
136 | return lz4.frame.decompress(f.read()) |
137 | ||
138 | if start.startswith(b'\x89LZO'): | |
139 | # python3-lzo is not packaged for Fedora | |
140 | raise NotImplementedError('lzo decompression not implemented') | |
141 | ||
142 | if start.startswith(b'BZh'): | |
667578bb | 143 | bz2 = try_import('bz2', 'bzip2') |
483c9c1b ZJS |
144 | return bz2.open(f).read() |
145 | ||
146 | if start.startswith(b'\x5d\x00\x00'): | |
667578bb | 147 | lzma = try_import('lzma') |
483c9c1b ZJS |
148 | return lzma.open(f).read() |
149 | ||
150 | raise NotImplementedError(f'unknown file format (starts with {start})') | |
151 | ||
152 | ||
153 | class Uname: | |
154 | # This class is here purely as a namespace for the functions | |
155 | ||
156 | VERSION_PATTERN = r'(?P<version>[a-z0-9._-]+) \([^ )]+\) (?:#.*)' | |
157 | ||
158 | NOTES_PATTERN = r'^\s+Linux\s+0x[0-9a-f]+\s+OPEN\n\s+description data: (?P<version>[0-9a-f ]+)\s*$' | |
159 | ||
160 | # Linux version 6.0.8-300.fc37.ppc64le (mockbuild@buildvm-ppc64le-03.iad2.fedoraproject.org) | |
161 | # (gcc (GCC) 12.2.1 20220819 (Red Hat 12.2.1-2), GNU ld version 2.38-24.fc37) | |
162 | # #1 SMP Fri Nov 11 14:39:11 UTC 2022 | |
163 | TEXT_PATTERN = rb'Linux version (?P<version>\d\.\S+) \(' | |
164 | ||
165 | @classmethod | |
166 | def scrape_x86(cls, filename, opts=None): | |
167 | # Based on https://gitlab.archlinux.org/archlinux/mkinitcpio/mkinitcpio/-/blob/master/functions#L136 | |
168 | # and https://www.kernel.org/doc/html/latest/x86/boot.html#the-real-mode-kernel-header | |
169 | with open(filename, 'rb') as f: | |
170 | f.seek(0x202) | |
171 | magic = f.read(4) | |
172 | if magic != b'HdrS': | |
173 | raise ValueError('Real-Mode Kernel Header magic not found') | |
174 | f.seek(0x20E) | |
175 | offset = f.read(1)[0] + f.read(1)[0]*256 # Pointer to kernel version string | |
176 | f.seek(0x200 + offset) | |
177 | text = f.read(128) | |
178 | text = text.split(b'\0', maxsplit=1)[0] | |
179 | text = text.decode() | |
180 | ||
181 | if not (m := re.match(cls.VERSION_PATTERN, text)): | |
182 | raise ValueError(f'Cannot parse version-host-release uname string: {text!r}') | |
183 | return m.group('version') | |
184 | ||
185 | @classmethod | |
186 | def scrape_elf(cls, filename, opts=None): | |
187 | readelf = find_tool('readelf', opts=opts) | |
188 | ||
189 | cmd = [ | |
190 | readelf, | |
191 | '--notes', | |
192 | filename, | |
193 | ] | |
194 | ||
195 | print('+', shell_join(cmd)) | |
33bdec18 ZJS |
196 | try: |
197 | notes = subprocess.check_output(cmd, stderr=subprocess.PIPE, text=True) | |
198 | except subprocess.CalledProcessError as e: | |
199 | raise ValueError(e.stderr.strip()) from e | |
483c9c1b ZJS |
200 | |
201 | if not (m := re.search(cls.NOTES_PATTERN, notes, re.MULTILINE)): | |
202 | raise ValueError('Cannot find Linux version note') | |
203 | ||
204 | text = ''.join(chr(int(c, 16)) for c in m.group('version').split()) | |
205 | return text.rstrip('\0') | |
206 | ||
207 | @classmethod | |
208 | def scrape_generic(cls, filename, opts=None): | |
209 | # import libarchive | |
210 | # libarchive-c fails with | |
211 | # ArchiveError: Unrecognized archive format (errno=84, retcode=-30, archive_p=94705420454656) | |
212 | ||
213 | # Based on https://gitlab.archlinux.org/archlinux/mkinitcpio/mkinitcpio/-/blob/master/functions#L209 | |
214 | ||
215 | text = maybe_decompress(filename) | |
216 | if not (m := re.search(cls.TEXT_PATTERN, text)): | |
217 | raise ValueError(f'Cannot find {cls.TEXT_PATTERN!r} in {filename}') | |
218 | ||
219 | return m.group('version').decode() | |
220 | ||
221 | @classmethod | |
222 | def scrape(cls, filename, opts=None): | |
223 | for func in (cls.scrape_x86, cls.scrape_elf, cls.scrape_generic): | |
224 | try: | |
225 | version = func(filename, opts=opts) | |
226 | print(f'Found uname version: {version}') | |
227 | return version | |
228 | except ValueError as e: | |
229 | print(str(e)) | |
230 | return None | |
231 | ||
232 | ||
f4780cbe ZJS |
233 | @dataclasses.dataclass |
234 | class Section: | |
235 | name: str | |
236 | content: pathlib.Path | |
a758f95c | 237 | tmpfile: Optional[IO] = None |
f4780cbe ZJS |
238 | measure: bool = False |
239 | ||
240 | @classmethod | |
789a6427 | 241 | def create(cls, name, contents, **kwargs): |
09595fd5 | 242 | if isinstance(contents, (str, bytes)): |
54c84c8a ZJS |
243 | mode = 'wt' if isinstance(contents, str) else 'wb' |
244 | tmp = tempfile.NamedTemporaryFile(mode=mode, prefix=f'tmp{name}') | |
f4780cbe ZJS |
245 | tmp.write(contents) |
246 | tmp.flush() | |
247 | contents = pathlib.Path(tmp.name) | |
248 | else: | |
249 | tmp = None | |
250 | ||
789a6427 | 251 | return cls(name, contents, tmpfile=tmp, **kwargs) |
f4780cbe ZJS |
252 | |
253 | @classmethod | |
254 | def parse_arg(cls, s): | |
255 | try: | |
256 | name, contents, *rest = s.split(':') | |
257 | except ValueError as e: | |
258 | raise ValueError(f'Cannot parse section spec (name or contents missing): {s!r}') from e | |
259 | if rest: | |
260 | raise ValueError(f'Cannot parse section spec (extraneous parameters): {s!r}') | |
261 | ||
262 | if contents.startswith('@'): | |
263 | contents = pathlib.Path(contents[1:]) | |
264 | ||
265 | return cls.create(name, contents) | |
266 | ||
267 | def size(self): | |
268 | return self.content.stat().st_size | |
269 | ||
270 | def check_name(self): | |
271 | # PE section names with more than 8 characters are legal, but our stub does | |
272 | # not support them. | |
273 | if not self.name.isascii() or not self.name.isprintable(): | |
274 | raise ValueError(f'Bad section name: {self.name!r}') | |
275 | if len(self.name) > 8: | |
276 | raise ValueError(f'Section name too long: {self.name!r}') | |
277 | ||
278 | ||
279 | @dataclasses.dataclass | |
280 | class UKI: | |
a758f95c | 281 | executable: list[Union[pathlib.Path, str]] |
f4780cbe | 282 | sections: list[Section] = dataclasses.field(default_factory=list, init=False) |
f4780cbe ZJS |
283 | |
284 | def add_section(self, section): | |
f4780cbe ZJS |
285 | if section.name in [s.name for s in self.sections]: |
286 | raise ValueError(f'Duplicate section {section.name}') | |
287 | ||
f4780cbe ZJS |
288 | self.sections += [section] |
289 | ||
290 | ||
291 | def parse_banks(s): | |
292 | banks = re.split(r',|\s+', s) | |
293 | # TODO: do some sanity checking here | |
294 | return banks | |
295 | ||
296 | ||
297 | KNOWN_PHASES = ( | |
298 | 'enter-initrd', | |
299 | 'leave-initrd', | |
300 | 'sysinit', | |
301 | 'ready', | |
302 | 'shutdown', | |
303 | 'final', | |
304 | ) | |
305 | ||
306 | def parse_phase_paths(s): | |
307 | # Split on commas or whitespace here. Commas might be hard to parse visually. | |
308 | paths = re.split(r',|\s+', s) | |
309 | ||
310 | for path in paths: | |
311 | for phase in path.split(':'): | |
312 | if phase not in KNOWN_PHASES: | |
313 | raise argparse.ArgumentTypeError(f'Unknown boot phase {phase!r} ({path=})') | |
314 | ||
315 | return paths | |
316 | ||
317 | ||
318 | def check_splash(filename): | |
319 | if filename is None: | |
320 | return | |
321 | ||
322 | # import is delayed, to avoid import when the splash image is not used | |
323 | try: | |
324 | from PIL import Image | |
325 | except ImportError: | |
326 | return | |
327 | ||
328 | img = Image.open(filename, formats=['BMP']) | |
329 | print(f'Splash image {filename} is {img.width}×{img.height} pixels') | |
330 | ||
331 | ||
332 | def check_inputs(opts): | |
333 | for name, value in vars(opts).items(): | |
334 | if name in {'output', 'tools'}: | |
335 | continue | |
336 | ||
5143a47a ZJS |
337 | if isinstance(value, pathlib.Path): |
338 | # Open file to check that we can read it, or generate an exception | |
339 | value.open().close() | |
340 | elif isinstance(value, list): | |
341 | for item in value: | |
342 | if isinstance(item, pathlib.Path): | |
343 | item.open().close() | |
f4780cbe ZJS |
344 | |
345 | check_splash(opts.splash) | |
346 | ||
347 | ||
348 | def find_tool(name, fallback=None, opts=None): | |
349 | if opts and opts.tools: | |
22ad038a DDM |
350 | for d in opts.tools: |
351 | tool = d / name | |
352 | if tool.exists(): | |
353 | return tool | |
f4780cbe | 354 | |
c8add4c2 JJ |
355 | if shutil.which(name) is not None: |
356 | return name | |
357 | ||
e673c5c2 EGE |
358 | if fallback is None: |
359 | print(f"Tool {name} not installed!") | |
f4780cbe | 360 | |
e673c5c2 | 361 | return fallback |
f4780cbe ZJS |
362 | |
363 | def combine_signatures(pcrsigs): | |
364 | combined = collections.defaultdict(list) | |
365 | for pcrsig in pcrsigs: | |
366 | for bank, sigs in pcrsig.items(): | |
367 | for sig in sigs: | |
368 | if sig not in combined[bank]: | |
369 | combined[bank] += [sig] | |
370 | return json.dumps(combined) | |
371 | ||
372 | ||
373 | def call_systemd_measure(uki, linux, opts): | |
374 | measure_tool = find_tool('systemd-measure', | |
375 | '/usr/lib/systemd/systemd-measure', | |
376 | opts=opts) | |
377 | ||
378 | banks = opts.pcr_banks or () | |
379 | ||
380 | # PCR measurement | |
381 | ||
382 | if opts.measure: | |
383 | pp_groups = opts.phase_path_groups or [] | |
384 | ||
385 | cmd = [ | |
386 | measure_tool, | |
387 | 'calculate', | |
388 | f'--linux={linux}', | |
389 | *(f"--{s.name.removeprefix('.')}={s.content}" | |
390 | for s in uki.sections | |
391 | if s.measure), | |
392 | *(f'--bank={bank}' | |
393 | for bank in banks), | |
394 | # For measurement, the keys are not relevant, so we can lump all the phase paths | |
395 | # into one call to systemd-measure calculate. | |
396 | *(f'--phase={phase_path}' | |
397 | for phase_path in itertools.chain.from_iterable(pp_groups)), | |
398 | ] | |
399 | ||
400 | print('+', shell_join(cmd)) | |
401 | subprocess.check_call(cmd) | |
402 | ||
403 | # PCR signing | |
404 | ||
405 | if opts.pcr_private_keys: | |
406 | n_priv = len(opts.pcr_private_keys or ()) | |
407 | pp_groups = opts.phase_path_groups or [None] * n_priv | |
408 | pub_keys = opts.pcr_public_keys or [None] * n_priv | |
409 | ||
410 | pcrsigs = [] | |
411 | ||
412 | cmd = [ | |
413 | measure_tool, | |
414 | 'sign', | |
415 | f'--linux={linux}', | |
416 | *(f"--{s.name.removeprefix('.')}={s.content}" | |
417 | for s in uki.sections | |
418 | if s.measure), | |
419 | *(f'--bank={bank}' | |
420 | for bank in banks), | |
421 | ] | |
422 | ||
423 | for priv_key, pub_key, group in zip(opts.pcr_private_keys, | |
424 | pub_keys, | |
425 | pp_groups): | |
426 | extra = [f'--private-key={priv_key}'] | |
427 | if pub_key: | |
428 | extra += [f'--public-key={pub_key}'] | |
429 | extra += [f'--phase={phase_path}' for phase_path in group or ()] | |
430 | ||
431 | print('+', shell_join(cmd + extra)) | |
432 | pcrsig = subprocess.check_output(cmd + extra, text=True) | |
433 | pcrsig = json.loads(pcrsig) | |
434 | pcrsigs += [pcrsig] | |
435 | ||
436 | combined = combine_signatures(pcrsigs) | |
437 | uki.add_section(Section.create('.pcrsig', combined)) | |
438 | ||
439 | ||
54c84c8a | 440 | def join_initrds(initrds): |
09595fd5 DDM |
441 | if len(initrds) == 0: |
442 | return None | |
c4fc2546 | 443 | if len(initrds) == 1: |
09595fd5 DDM |
444 | return initrds[0] |
445 | ||
446 | seq = [] | |
447 | for file in initrds: | |
448 | initrd = file.read_bytes() | |
c126c8ac YW |
449 | n = len(initrd) |
450 | padding = b'\0' * (round_up(n, 4) - n) # pad to 32 bit alignment | |
09595fd5 DDM |
451 | seq += [initrd, padding] |
452 | ||
453 | return b''.join(seq) | |
54c84c8a ZJS |
454 | |
455 | ||
c811aba0 DDM |
456 | def pairwise(iterable): |
457 | a, b = itertools.tee(iterable) | |
458 | next(b, None) | |
459 | return zip(a, b) | |
460 | ||
461 | ||
7081db29 | 462 | class PEError(Exception): |
3fc5eed4 JJ |
463 | pass |
464 | ||
3fc1ae89 | 465 | |
3fc5eed4 JJ |
466 | def pe_add_sections(uki: UKI, output: str): |
467 | pe = pefile.PE(uki.executable, fast_load=True) | |
ac3412c3 | 468 | |
7f72dca7 JJ |
469 | # Old stubs do not have the symbol/string table stripped, even though image files should not have one. |
470 | if symbol_table := pe.FILE_HEADER.PointerToSymbolTable: | |
471 | symbol_table_size = 18 * pe.FILE_HEADER.NumberOfSymbols | |
472 | if string_table_size := pe.get_dword_from_offset(symbol_table + symbol_table_size): | |
473 | symbol_table_size += string_table_size | |
474 | ||
475 | # Let's be safe and only strip it if it's at the end of the file. | |
476 | if symbol_table + symbol_table_size == len(pe.__data__): | |
477 | pe.__data__ = pe.__data__[:symbol_table] | |
478 | pe.FILE_HEADER.PointerToSymbolTable = 0 | |
479 | pe.FILE_HEADER.NumberOfSymbols = 0 | |
480 | pe.FILE_HEADER.IMAGE_FILE_LOCAL_SYMS_STRIPPED = True | |
481 | ||
ac3412c3 | 482 | # Old stubs might have been stripped, leading to unaligned raw data values, so let's fix them up here. |
c4fc2546 ZJS |
483 | # pylint thinks that Structure doesn't have various members that it has… |
484 | # pylint: disable=no-member | |
485 | ||
ac3412c3 DDM |
486 | for i, section in enumerate(pe.sections): |
487 | oldp = section.PointerToRawData | |
488 | oldsz = section.SizeOfRawData | |
489 | section.PointerToRawData = round_up(oldp, pe.OPTIONAL_HEADER.FileAlignment) | |
490 | section.SizeOfRawData = round_up(oldsz, pe.OPTIONAL_HEADER.FileAlignment) | |
491 | padp = section.PointerToRawData - oldp | |
492 | padsz = section.SizeOfRawData - oldsz | |
493 | ||
494 | for later_section in pe.sections[i+1:]: | |
495 | later_section.PointerToRawData += padp + padsz | |
496 | ||
497 | pe.__data__ = pe.__data__[:oldp] + bytes(padp) + pe.__data__[oldp:oldp+oldsz] + bytes(padsz) + pe.__data__[oldp+oldsz:] | |
498 | ||
499 | # We might not have any space to add new sections. Let's try our best to make some space by padding the | |
500 | # SizeOfHeaders to a multiple of the file alignment. This is safe because the first section's data starts | |
501 | # at a multiple of the file alignment, so all space before that is unused. | |
502 | pe.OPTIONAL_HEADER.SizeOfHeaders = round_up(pe.OPTIONAL_HEADER.SizeOfHeaders, pe.OPTIONAL_HEADER.FileAlignment) | |
503 | pe = pefile.PE(data=pe.write(), fast_load=True) | |
3fc1ae89 | 504 | |
3fc5eed4 JJ |
505 | warnings = pe.get_warnings() |
506 | if warnings: | |
7081db29 | 507 | raise PEError(f'pefile warnings treated as errors: {warnings}') |
3fc1ae89 | 508 | |
3fc5eed4 JJ |
509 | security = pe.OPTIONAL_HEADER.DATA_DIRECTORY[pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_SECURITY']] |
510 | if security.VirtualAddress != 0: | |
511 | # We could strip the signatures, but why would anyone sign the stub? | |
7081db29 | 512 | raise PEError('Stub image is signed, refusing.') |
3fc5eed4 JJ |
513 | |
514 | for section in uki.sections: | |
515 | new_section = pefile.SectionStructure(pe.__IMAGE_SECTION_HEADER_format__, pe=pe) | |
516 | new_section.__unpack__(b'\0' * new_section.sizeof()) | |
517 | ||
518 | offset = pe.sections[-1].get_file_offset() + new_section.sizeof() | |
519 | if offset + new_section.sizeof() > pe.OPTIONAL_HEADER.SizeOfHeaders: | |
7081db29 | 520 | raise PEError(f'Not enough header space to add section {section.name}.') |
3fc5eed4 JJ |
521 | |
522 | data = section.content.read_bytes() | |
523 | ||
524 | new_section.set_file_offset(offset) | |
525 | new_section.Name = section.name.encode() | |
526 | new_section.Misc_VirtualSize = len(data) | |
ac3412c3 DDM |
527 | # Non-stripped stubs might still have an unaligned symbol table at the end, making their size |
528 | # unaligned, so we make sure to explicitly pad the pointer to new sections to an aligned offset. | |
529 | new_section.PointerToRawData = round_up(len(pe.__data__), pe.OPTIONAL_HEADER.FileAlignment) | |
3fc5eed4 JJ |
530 | new_section.SizeOfRawData = round_up(len(data), pe.OPTIONAL_HEADER.FileAlignment) |
531 | new_section.VirtualAddress = round_up( | |
532 | pe.sections[-1].VirtualAddress + pe.sections[-1].Misc_VirtualSize, | |
533 | pe.OPTIONAL_HEADER.SectionAlignment, | |
534 | ) | |
535 | ||
536 | new_section.IMAGE_SCN_MEM_READ = True | |
537 | if section.name == '.linux': | |
538 | # Old kernels that use EFI handover protocol will be executed inline. | |
539 | new_section.IMAGE_SCN_CNT_CODE = True | |
540 | else: | |
541 | new_section.IMAGE_SCN_CNT_INITIALIZED_DATA = True | |
542 | ||
ac3412c3 | 543 | pe.__data__ = pe.__data__[:] + bytes(new_section.PointerToRawData - len(pe.__data__)) + data + bytes(new_section.SizeOfRawData - len(data)) |
3fc5eed4 JJ |
544 | |
545 | pe.FILE_HEADER.NumberOfSections += 1 | |
546 | pe.OPTIONAL_HEADER.SizeOfInitializedData += new_section.Misc_VirtualSize | |
547 | pe.__structures__.append(new_section) | |
548 | pe.sections.append(new_section) | |
549 | ||
550 | pe.OPTIONAL_HEADER.CheckSum = 0 | |
551 | pe.OPTIONAL_HEADER.SizeOfImage = round_up( | |
552 | pe.sections[-1].VirtualAddress + pe.sections[-1].Misc_VirtualSize, | |
553 | pe.OPTIONAL_HEADER.SectionAlignment, | |
554 | ) | |
555 | ||
556 | pe.write(output) | |
3fc1ae89 | 557 | |
c1e8d172 EGE |
558 | def signer_sign(cmd): |
559 | print('+', shell_join(cmd)) | |
560 | subprocess.check_call(cmd) | |
3fc1ae89 | 561 | |
c1e8d172 EGE |
562 | def find_sbsign(opts=None): |
563 | return find_tool('sbsign', opts=opts) | |
f4780cbe | 564 | |
c1e8d172 EGE |
565 | def sbsign_sign(sbsign_tool, input_f, output_f, opts=None): |
566 | sign_invocation = [ | |
f4780cbe ZJS |
567 | sbsign_tool, |
568 | '--key', opts.sb_key, | |
569 | '--cert', opts.sb_cert, | |
c1e8d172 EGE |
570 | input_f, |
571 | '--output', output_f, | |
f4780cbe | 572 | ] |
f4780cbe | 573 | if opts.signing_engine is not None: |
c1e8d172 EGE |
574 | sign_invocation += ['--engine', opts.signing_engine] |
575 | signer_sign(sign_invocation) | |
576 | ||
577 | def find_pesign(opts=None): | |
578 | return find_tool('pesign', opts=opts) | |
579 | ||
580 | def pesign_sign(pesign_tool, input_f, output_f, opts=None): | |
581 | sign_invocation = [ | |
582 | pesign_tool, '-s', '--force', | |
583 | '-n', opts.sb_certdir, | |
584 | '-c', opts.sb_cert_name, | |
585 | '-i', input_f, | |
586 | '-o', output_f, | |
587 | ] | |
588 | signer_sign(sign_invocation) | |
f4780cbe | 589 | |
c1e8d172 EGE |
590 | SBVERIFY = { |
591 | 'name': 'sbverify', | |
592 | 'option': '--list', | |
593 | 'output': 'No signature table present', | |
594 | } | |
f4780cbe | 595 | |
c1e8d172 EGE |
596 | PESIGCHECK = { |
597 | 'name': 'pesign', | |
598 | 'option': '-i', | |
599 | 'output': 'No signatures found.', | |
600 | 'flags': '-S' | |
601 | } | |
f4780cbe | 602 | |
c1e8d172 EGE |
603 | def verify(tool, opts): |
604 | verify_tool = find_tool(tool['name'], opts=opts) | |
605 | cmd = [ | |
606 | verify_tool, | |
607 | tool['option'], | |
608 | opts.linux, | |
609 | ] | |
610 | if 'flags' in tool: | |
611 | cmd.append(tool['flags']) | |
612 | ||
613 | print('+', shell_join(cmd)) | |
614 | info = subprocess.check_output(cmd, text=True) | |
615 | ||
616 | return tool['output'] in info | |
617 | ||
618 | def make_uki(opts): | |
619 | # kernel payload signing | |
620 | ||
621 | sign_tool = None | |
622 | if opts.signtool == 'sbsign': | |
623 | sign_tool = find_sbsign(opts=opts) | |
624 | sign = sbsign_sign | |
625 | verify_tool = SBVERIFY | |
626 | else: | |
627 | sign_tool = find_pesign(opts=opts) | |
628 | sign = pesign_sign | |
629 | verify_tool = PESIGCHECK | |
630 | ||
631 | sign_args_present = opts.sb_key or opts.sb_cert_name | |
f4780cbe | 632 | |
c1e8d172 EGE |
633 | if sign_tool is None and sign_args_present: |
634 | raise ValueError(f'{opts.signtool}, required for signing, is not installed') | |
635 | ||
636 | sign_kernel = opts.sign_kernel | |
637 | if sign_kernel is None and opts.linux is not None and sign_args_present: | |
638 | # figure out if we should sign the kernel | |
639 | sign_kernel = verify(verify_tool, opts) | |
f4780cbe ZJS |
640 | |
641 | if sign_kernel: | |
642 | linux_signed = tempfile.NamedTemporaryFile(prefix='linux-signed') | |
8d89d66c | 643 | linux = pathlib.Path(linux_signed.name) |
c1e8d172 | 644 | sign(sign_tool, opts.linux, linux, opts=opts) |
f4780cbe ZJS |
645 | else: |
646 | linux = opts.linux | |
647 | ||
00e5933f | 648 | if opts.uname is None and opts.linux is not None: |
483c9c1b ZJS |
649 | print('Kernel version not specified, starting autodetection 😖.') |
650 | opts.uname = Uname.scrape(opts.linux, opts=opts) | |
651 | ||
f4780cbe | 652 | uki = UKI(opts.stub) |
54c84c8a | 653 | initrd = join_initrds(opts.initrd) |
f4780cbe | 654 | |
30fd9a2d | 655 | # TODO: derive public key from opts.pcr_private_keys? |
f4780cbe ZJS |
656 | pcrpkey = opts.pcrpkey |
657 | if pcrpkey is None: | |
658 | if opts.pcr_public_keys and len(opts.pcr_public_keys) == 1: | |
659 | pcrpkey = opts.pcr_public_keys[0] | |
660 | ||
661 | sections = [ | |
662 | # name, content, measure? | |
663 | ('.osrel', opts.os_release, True ), | |
664 | ('.cmdline', opts.cmdline, True ), | |
665 | ('.dtb', opts.devicetree, True ), | |
b6f2e686 | 666 | ('.uname', opts.uname, True ), |
f4780cbe ZJS |
667 | ('.splash', opts.splash, True ), |
668 | ('.pcrpkey', pcrpkey, True ), | |
54c84c8a | 669 | ('.initrd', initrd, True ), |
f4780cbe ZJS |
670 | |
671 | # linux shall be last to leave breathing room for decompression. | |
672 | # We'll add it later. | |
673 | ] | |
674 | ||
675 | for name, content, measure in sections: | |
676 | if content: | |
677 | uki.add_section(Section.create(name, content, measure=measure)) | |
678 | ||
679 | # systemd-measure doesn't know about those extra sections | |
680 | for section in opts.sections: | |
681 | uki.add_section(section) | |
682 | ||
683 | # PCR measurement and signing | |
684 | ||
685 | call_systemd_measure(uki, linux, opts=opts) | |
686 | ||
c67d5a02 | 687 | # UKI or addon creation - addons don't use the stub so we add SBAT manually |
f4780cbe | 688 | |
00e5933f LB |
689 | if linux is not None: |
690 | uki.add_section(Section.create('.linux', linux, measure=True)) | |
c67d5a02 LB |
691 | elif opts.sbat: |
692 | uki.add_section(Section.create('.sbat', opts.sbat, measure=False)) | |
f4780cbe | 693 | |
c1e8d172 | 694 | if sign_args_present: |
f4780cbe ZJS |
695 | unsigned = tempfile.NamedTemporaryFile(prefix='uki') |
696 | output = unsigned.name | |
697 | else: | |
698 | output = opts.output | |
699 | ||
3fc5eed4 | 700 | pe_add_sections(uki, output) |
3fc1ae89 | 701 | |
f4780cbe ZJS |
702 | # UKI signing |
703 | ||
c1e8d172 EGE |
704 | if sign_args_present: |
705 | sign(sign_tool, unsigned.name, opts.output, opts=opts) | |
f4780cbe ZJS |
706 | |
707 | # We end up with no executable bits, let's reapply them | |
708 | os.umask(umask := os.umask(0)) | |
709 | os.chmod(opts.output, 0o777 & ~umask) | |
710 | ||
c1e8d172 | 711 | print(f"Wrote {'signed' if sign_args_present else 'unsigned'} {opts.output}") |
f4780cbe ZJS |
712 | |
713 | ||
5143a47a ZJS |
714 | @dataclasses.dataclass(frozen=True) |
715 | class ConfigItem: | |
716 | @staticmethod | |
a758f95c ZJS |
717 | def config_list_prepend( |
718 | namespace: argparse.Namespace, | |
719 | group: Optional[str], | |
720 | dest: str, | |
721 | value: Any, | |
722 | ) -> None: | |
5143a47a ZJS |
723 | "Prepend value to namespace.<dest>" |
724 | ||
725 | assert not group | |
726 | ||
727 | old = getattr(namespace, dest, []) | |
728 | setattr(namespace, dest, value + old) | |
729 | ||
730 | @staticmethod | |
a758f95c ZJS |
731 | def config_set_if_unset( |
732 | namespace: argparse.Namespace, | |
733 | group: Optional[str], | |
734 | dest: str, | |
735 | value: Any, | |
736 | ) -> None: | |
5143a47a ZJS |
737 | "Set namespace.<dest> to value only if it was None" |
738 | ||
739 | assert not group | |
740 | ||
741 | if getattr(namespace, dest) is None: | |
742 | setattr(namespace, dest, value) | |
743 | ||
744 | @staticmethod | |
a758f95c ZJS |
745 | def config_set_group( |
746 | namespace: argparse.Namespace, | |
747 | group: Optional[str], | |
748 | dest: str, | |
749 | value: Any, | |
750 | ) -> None: | |
5143a47a ZJS |
751 | "Set namespace.<dest>[idx] to value, with idx derived from group" |
752 | ||
c4fc2546 | 753 | # pylint: disable=protected-access |
5143a47a ZJS |
754 | if group not in namespace._groups: |
755 | namespace._groups += [group] | |
756 | idx = namespace._groups.index(group) | |
757 | ||
758 | old = getattr(namespace, dest, None) | |
759 | if old is None: | |
760 | old = [] | |
761 | setattr(namespace, dest, | |
762 | old + ([None] * (idx - len(old))) + [value]) | |
763 | ||
764 | @staticmethod | |
765 | def parse_boolean(s: str) -> bool: | |
766 | "Parse 1/true/yes/y/t/on as true and 0/false/no/n/f/off/None as false" | |
767 | s_l = s.lower() | |
768 | if s_l in {'1', 'true', 'yes', 'y', 't', 'on'}: | |
769 | return True | |
770 | if s_l in {'0', 'false', 'no', 'n', 'f', 'off'}: | |
771 | return False | |
772 | raise ValueError('f"Invalid boolean literal: {s!r}') | |
773 | ||
774 | # arguments for argparse.ArgumentParser.add_argument() | |
a758f95c ZJS |
775 | name: Union[str, tuple[str, str]] |
776 | dest: Optional[str] = None | |
777 | metavar: Optional[str] = None | |
778 | type: Optional[Callable] = None | |
779 | nargs: Optional[str] = None | |
780 | action: Optional[Union[str, Callable]] = None | |
781 | default: Any = None | |
782 | version: Optional[str] = None | |
783 | choices: Optional[tuple[str, ...]] = None | |
784 | help: Optional[str] = None | |
5143a47a ZJS |
785 | |
786 | # metadata for config file parsing | |
a758f95c ZJS |
787 | config_key: Optional[str] = None |
788 | config_push: Callable[[argparse.Namespace, Optional[str], str, Any], None] = \ | |
789 | config_set_if_unset | |
5143a47a | 790 | |
a758f95c | 791 | def _names(self) -> tuple[str, ...]: |
5143a47a ZJS |
792 | return self.name if isinstance(self.name, tuple) else (self.name,) |
793 | ||
794 | def argparse_dest(self) -> str: | |
795 | # It'd be nice if argparse exported this, but I don't see that in the API | |
796 | if self.dest: | |
797 | return self.dest | |
798 | return self._names()[0].lstrip('-').replace('-', '_') | |
799 | ||
800 | def add_to(self, parser: argparse.ArgumentParser): | |
801 | kwargs = { key:val | |
802 | for key in dataclasses.asdict(self) | |
803 | if (key not in ('name', 'config_key', 'config_push') and | |
804 | (val := getattr(self, key)) is not None) } | |
805 | args = self._names() | |
806 | parser.add_argument(*args, **kwargs) | |
807 | ||
808 | def apply_config(self, namespace, section, group, key, value) -> None: | |
809 | assert f'{section}/{key}' == self.config_key | |
810 | dest = self.argparse_dest() | |
811 | ||
a758f95c | 812 | conv: Callable[[str], Any] |
5143a47a ZJS |
813 | if self.action == argparse.BooleanOptionalAction: |
814 | # We need to handle this case separately: the options are called | |
815 | # --foo and --no-foo, and no argument is parsed. But in the config | |
816 | # file, we have Foo=yes or Foo=no. | |
817 | conv = self.parse_boolean | |
818 | elif self.type: | |
819 | conv = self.type | |
820 | else: | |
821 | conv = lambda s:s | |
822 | ||
823 | if self.nargs == '*': | |
824 | value = [conv(v) for v in value.split()] | |
825 | else: | |
826 | value = conv(value) | |
827 | ||
828 | self.config_push(namespace, group, dest, value) | |
829 | ||
a758f95c | 830 | def config_example(self) -> tuple[Optional[str], Optional[str], Optional[str]]: |
5143a47a ZJS |
831 | if not self.config_key: |
832 | return None, None, None | |
833 | section_name, key = self.config_key.split('/', 1) | |
834 | if section_name.endswith(':'): | |
835 | section_name += 'NAME' | |
836 | if self.choices: | |
837 | value = '|'.join(self.choices) | |
838 | else: | |
839 | value = self.metavar or self.argparse_dest().upper() | |
840 | return (section_name, key, value) | |
841 | ||
842 | ||
843 | CONFIG_ITEMS = [ | |
844 | ConfigItem( | |
845 | '--version', | |
846 | action = 'version', | |
847 | version = f'ukify {__version__}', | |
848 | ), | |
849 | ||
850 | ConfigItem( | |
851 | '--summary', | |
852 | help = 'print parsed config and exit', | |
853 | action = 'store_true', | |
854 | ), | |
855 | ||
856 | ConfigItem( | |
857 | 'linux', | |
858 | metavar = 'LINUX', | |
859 | type = pathlib.Path, | |
860 | nargs = '?', | |
861 | help = 'vmlinuz file [.linux section]', | |
862 | config_key = 'UKI/Linux', | |
863 | ), | |
864 | ||
865 | ConfigItem( | |
866 | 'initrd', | |
867 | metavar = 'INITRD…', | |
868 | type = pathlib.Path, | |
869 | nargs = '*', | |
870 | help = 'initrd files [.initrd section]', | |
871 | config_key = 'UKI/Initrd', | |
872 | config_push = ConfigItem.config_list_prepend, | |
873 | ), | |
874 | ||
875 | ConfigItem( | |
876 | ('--config', '-c'), | |
877 | metavar = 'PATH', | |
878 | help = 'configuration file', | |
879 | ), | |
880 | ||
881 | ConfigItem( | |
882 | '--cmdline', | |
883 | metavar = 'TEXT|@PATH', | |
884 | help = 'kernel command line [.cmdline section]', | |
885 | config_key = 'UKI/Cmdline', | |
886 | ), | |
887 | ||
888 | ConfigItem( | |
889 | '--os-release', | |
890 | metavar = 'TEXT|@PATH', | |
891 | help = 'path to os-release file [.osrel section]', | |
892 | config_key = 'UKI/OSRelease', | |
893 | ), | |
894 | ||
895 | ConfigItem( | |
896 | '--devicetree', | |
897 | metavar = 'PATH', | |
898 | type = pathlib.Path, | |
899 | help = 'Device Tree file [.dtb section]', | |
900 | config_key = 'UKI/DeviceTree', | |
901 | ), | |
902 | ConfigItem( | |
903 | '--splash', | |
904 | metavar = 'BMP', | |
905 | type = pathlib.Path, | |
906 | help = 'splash image bitmap file [.splash section]', | |
907 | config_key = 'UKI/Splash', | |
908 | ), | |
909 | ConfigItem( | |
910 | '--pcrpkey', | |
911 | metavar = 'KEY', | |
912 | type = pathlib.Path, | |
913 | help = 'embedded public key to seal secrets to [.pcrpkey section]', | |
914 | config_key = 'UKI/PCRPKey', | |
915 | ), | |
916 | ConfigItem( | |
917 | '--uname', | |
918 | metavar='VERSION', | |
919 | help='"uname -r" information [.uname section]', | |
920 | config_key = 'UKI/Uname', | |
921 | ), | |
922 | ||
923 | ConfigItem( | |
924 | '--efi-arch', | |
925 | metavar = 'ARCH', | |
926 | choices = ('ia32', 'x64', 'arm', 'aa64', 'riscv64'), | |
927 | help = 'target EFI architecture', | |
928 | config_key = 'UKI/EFIArch', | |
929 | ), | |
930 | ||
931 | ConfigItem( | |
932 | '--stub', | |
933 | type = pathlib.Path, | |
934 | help = 'path to the sd-stub file [.text,.data,… sections]', | |
935 | config_key = 'UKI/Stub', | |
936 | ), | |
937 | ||
c67d5a02 LB |
938 | ConfigItem( |
939 | '--sbat', | |
940 | metavar = 'TEXT|@PATH', | |
941 | help = 'SBAT policy [.sbat section] for addons', | |
942 | default = """sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md | |
943 | uki.addon,1,UKI Addon,uki.addon,1,https://www.freedesktop.org/software/systemd/man/systemd-stub.html | |
944 | """, | |
945 | config_key = 'Addon/SBAT', | |
946 | ), | |
947 | ||
5143a47a ZJS |
948 | ConfigItem( |
949 | '--section', | |
950 | dest = 'sections', | |
951 | metavar = 'NAME:TEXT|@PATH', | |
952 | type = Section.parse_arg, | |
953 | action = 'append', | |
954 | default = [], | |
955 | help = 'additional section as name and contents [NAME section]', | |
956 | ), | |
957 | ||
958 | ConfigItem( | |
959 | '--pcr-banks', | |
960 | metavar = 'BANK…', | |
961 | type = parse_banks, | |
962 | config_key = 'UKI/PCRBanks', | |
963 | ), | |
964 | ||
965 | ConfigItem( | |
966 | '--signing-engine', | |
967 | metavar = 'ENGINE', | |
968 | help = 'OpenSSL engine to use for signing', | |
969 | config_key = 'UKI/SigningEngine', | |
970 | ), | |
c1e8d172 EGE |
971 | ConfigItem( |
972 | '--signtool', | |
973 | choices = ('sbsign', 'pesign'), | |
974 | dest = 'signtool', | |
975 | default = 'sbsign', | |
976 | help = 'whether to use sbsign or pesign. Default is sbsign.', | |
977 | config_key = 'UKI/SecureBootSigningTool', | |
978 | ), | |
5143a47a ZJS |
979 | ConfigItem( |
980 | '--secureboot-private-key', | |
981 | dest = 'sb_key', | |
c1e8d172 | 982 | help = 'required by --signtool=sbsign. Path to key file or engine-specific designation for SB signing', |
5143a47a ZJS |
983 | config_key = 'UKI/SecureBootPrivateKey', |
984 | ), | |
985 | ConfigItem( | |
986 | '--secureboot-certificate', | |
987 | dest = 'sb_cert', | |
c1e8d172 | 988 | help = 'required by --signtool=sbsign. sbsign needs a path to certificate file or engine-specific designation for SB signing', |
5143a47a ZJS |
989 | config_key = 'UKI/SecureBootCertificate', |
990 | ), | |
c1e8d172 EGE |
991 | ConfigItem( |
992 | '--secureboot-certificate-dir', | |
993 | dest = 'sb_certdir', | |
994 | default = '/etc/pki/pesign', | |
995 | help = 'required by --signtool=pesign. Path to nss certificate database directory for PE signing. Default is /etc/pki/pesign', | |
996 | config_key = 'UKI/SecureBootCertificateDir', | |
997 | ), | |
998 | ConfigItem( | |
999 | '--secureboot-certificate-name', | |
1000 | dest = 'sb_cert_name', | |
1001 | help = 'required by --signtool=pesign. pesign needs a certificate nickname of nss certificate database entry to use for PE signing', | |
1002 | config_key = 'UKI/SecureBootCertificateName', | |
1003 | ), | |
5143a47a ZJS |
1004 | |
1005 | ConfigItem( | |
1006 | '--sign-kernel', | |
1007 | action = argparse.BooleanOptionalAction, | |
1008 | help = 'Sign the embedded kernel', | |
1009 | config_key = 'UKI/SignKernel', | |
1010 | ), | |
1011 | ||
1012 | ConfigItem( | |
1013 | '--pcr-private-key', | |
1014 | dest = 'pcr_private_keys', | |
1015 | metavar = 'PATH', | |
1016 | type = pathlib.Path, | |
1017 | action = 'append', | |
1018 | help = 'private part of the keypair for signing PCR signatures', | |
1019 | config_key = 'PCRSignature:/PCRPrivateKey', | |
1020 | config_push = ConfigItem.config_set_group, | |
1021 | ), | |
1022 | ConfigItem( | |
1023 | '--pcr-public-key', | |
1024 | dest = 'pcr_public_keys', | |
1025 | metavar = 'PATH', | |
1026 | type = pathlib.Path, | |
1027 | action = 'append', | |
1028 | help = 'public part of the keypair for signing PCR signatures', | |
1029 | config_key = 'PCRSignature:/PCRPublicKey', | |
1030 | config_push = ConfigItem.config_set_group, | |
1031 | ), | |
1032 | ConfigItem( | |
1033 | '--phases', | |
1034 | dest = 'phase_path_groups', | |
1035 | metavar = 'PHASE-PATH…', | |
1036 | type = parse_phase_paths, | |
1037 | action = 'append', | |
1038 | help = 'phase-paths to create signatures for', | |
1039 | config_key = 'PCRSignature:/Phases', | |
1040 | config_push = ConfigItem.config_set_group, | |
1041 | ), | |
1042 | ||
1043 | ConfigItem( | |
1044 | '--tools', | |
1045 | type = pathlib.Path, | |
1046 | action = 'append', | |
1047 | help = 'Directories to search for tools (systemd-measure, …)', | |
1048 | ), | |
1049 | ||
1050 | ConfigItem( | |
1051 | ('--output', '-o'), | |
1052 | type = pathlib.Path, | |
1053 | help = 'output file path', | |
1054 | ), | |
1055 | ||
1056 | ConfigItem( | |
1057 | '--measure', | |
1058 | action = argparse.BooleanOptionalAction, | |
1059 | help = 'print systemd-measure output for the UKI', | |
1060 | ), | |
1061 | ] | |
1062 | ||
1063 | CONFIGFILE_ITEMS = { item.config_key:item | |
1064 | for item in CONFIG_ITEMS | |
1065 | if item.config_key } | |
1066 | ||
1067 | ||
1068 | def apply_config(namespace, filename=None): | |
1069 | if filename is None: | |
1070 | filename = namespace.config | |
1071 | if filename is None: | |
1072 | return | |
1073 | ||
1074 | # Fill in ._groups based on --pcr-public-key=, --pcr-private-key=, and --phases=. | |
1075 | assert '_groups' not in namespace | |
1076 | n_pcr_priv = len(namespace.pcr_private_keys or ()) | |
c4fc2546 | 1077 | namespace._groups = list(range(n_pcr_priv)) # pylint: disable=protected-access |
5143a47a ZJS |
1078 | |
1079 | cp = configparser.ConfigParser( | |
1080 | comment_prefixes='#', | |
1081 | inline_comment_prefixes='#', | |
1082 | delimiters='=', | |
1083 | empty_lines_in_values=False, | |
1084 | interpolation=None, | |
1085 | strict=False) | |
1086 | # Do not make keys lowercase | |
1087 | cp.optionxform = lambda option: option | |
1088 | ||
1089 | cp.read(filename) | |
1090 | ||
1091 | for section_name, section in cp.items(): | |
1092 | idx = section_name.find(':') | |
1093 | if idx >= 0: | |
1094 | section_name, group = section_name[:idx+1], section_name[idx+1:] | |
1095 | if not section_name or not group: | |
1096 | raise ValueError('Section name components cannot be empty') | |
1097 | if ':' in group: | |
1098 | raise ValueError('Section name cannot contain more than one ":"') | |
1099 | else: | |
1100 | group = None | |
1101 | for key, value in section.items(): | |
1102 | if item := CONFIGFILE_ITEMS.get(f'{section_name}/{key}'): | |
1103 | item.apply_config(namespace, section_name, group, key, value) | |
1104 | else: | |
1105 | print(f'Unknown config setting [{section_name}] {key}=') | |
1106 | ||
1107 | ||
1108 | def config_example(): | |
1109 | prev_section = None | |
1110 | for item in CONFIG_ITEMS: | |
1111 | section, key, value = item.config_example() | |
1112 | if section: | |
1113 | if prev_section != section: | |
1114 | if prev_section: | |
1115 | yield '' | |
1116 | yield f'[{section}]' | |
1117 | prev_section = section | |
1118 | yield f'{key} = {value}' | |
1119 | ||
1120 | ||
1121 | def create_parser(): | |
f4780cbe ZJS |
1122 | p = argparse.ArgumentParser( |
1123 | description='Build and sign Unified Kernel Images', | |
1124 | allow_abbrev=False, | |
1125 | usage='''\ | |
50f4add4 | 1126 | ukify [options…] [LINUX INITRD…] |
5143a47a ZJS |
1127 | ''', |
1128 | epilog='\n '.join(('config file:', *config_example())), | |
1129 | formatter_class=argparse.RawDescriptionHelpFormatter, | |
1130 | ) | |
1131 | ||
1132 | for item in CONFIG_ITEMS: | |
1133 | item.add_to(p) | |
f4780cbe ZJS |
1134 | |
1135 | # Suppress printing of usage synopsis on errors | |
1136 | p.error = lambda message: p.exit(2, f'{p.prog}: error: {message}\n') | |
1137 | ||
5143a47a | 1138 | return p |
f4780cbe | 1139 | |
095ff238 | 1140 | |
5143a47a | 1141 | def finalize_options(opts): |
f4780cbe | 1142 | if opts.cmdline and opts.cmdline.startswith('@'): |
5143a47a ZJS |
1143 | opts.cmdline = pathlib.Path(opts.cmdline[1:]) |
1144 | elif opts.cmdline: | |
1145 | # Drop whitespace from the commandline. If we're reading from a file, | |
1146 | # we copy the contents verbatim. But configuration specified on the commandline | |
1147 | # or in the config file may contain additional whitespace that has no meaning. | |
1148 | opts.cmdline = ' '.join(opts.cmdline.split()) | |
1149 | ||
1150 | if opts.os_release and opts.os_release.startswith('@'): | |
1151 | opts.os_release = pathlib.Path(opts.os_release[1:]) | |
1152 | elif not opts.os_release and opts.linux: | |
f4780cbe ZJS |
1153 | p = pathlib.Path('/etc/os-release') |
1154 | if not p.exists(): | |
5143a47a | 1155 | p = pathlib.Path('/usr/lib/os-release') |
f4780cbe ZJS |
1156 | opts.os_release = p |
1157 | ||
1158 | if opts.efi_arch is None: | |
1159 | opts.efi_arch = guess_efi_arch() | |
1160 | ||
1161 | if opts.stub is None: | |
f644ea3e LB |
1162 | if opts.linux is not None: |
1163 | opts.stub = pathlib.Path(f'/usr/lib/systemd/boot/efi/linux{opts.efi_arch}.efi.stub') | |
1164 | else: | |
1165 | opts.stub = pathlib.Path(f'/usr/lib/systemd/boot/efi/addon{opts.efi_arch}.efi.stub') | |
f4780cbe ZJS |
1166 | |
1167 | if opts.signing_engine is None: | |
5143a47a ZJS |
1168 | if opts.sb_key: |
1169 | opts.sb_key = pathlib.Path(opts.sb_key) | |
1170 | if opts.sb_cert: | |
1171 | opts.sb_cert = pathlib.Path(opts.sb_cert) | |
f4780cbe | 1172 | |
c1e8d172 EGE |
1173 | if opts.signtool == 'sbsign': |
1174 | if bool(opts.sb_key) ^ bool(opts.sb_cert): | |
1175 | raise ValueError('--secureboot-private-key= and --secureboot-certificate= must be specified together when using --signtool=sbsign') | |
1176 | else: | |
1177 | if not bool(opts.sb_cert_name): | |
1178 | raise ValueError('--certificate-name must be specified when using --signtool=pesign') | |
f4780cbe | 1179 | |
c1e8d172 EGE |
1180 | if opts.sign_kernel and not opts.sb_key and not opts.sb_cert_name: |
1181 | raise ValueError('--sign-kernel requires either --secureboot-private-key= and --secureboot-certificate= (for sbsign) or --secureboot-certificate-name= (for pesign) to be specified') | |
f4780cbe | 1182 | |
5143a47a ZJS |
1183 | if opts.output is None: |
1184 | if opts.linux is None: | |
1185 | raise ValueError('--output= must be specified when building a PE addon') | |
c1e8d172 | 1186 | suffix = '.efi' if opts.sb_key or opts.sb_cert_name else '.unsigned.efi' |
5143a47a ZJS |
1187 | opts.output = opts.linux.name + suffix |
1188 | ||
1189 | for section in opts.sections: | |
1190 | section.check_name() | |
1191 | ||
1192 | if opts.summary: | |
1193 | # TODO: replace pprint() with some fancy formatting. | |
1194 | pprint.pprint(vars(opts)) | |
1195 | sys.exit() | |
1196 | ||
1197 | ||
1198 | def parse_args(args=None): | |
1199 | p = create_parser() | |
1200 | opts = p.parse_args(args) | |
1201 | ||
1202 | # Check that --pcr-public-key=, --pcr-private-key=, and --phases= | |
1203 | # have either the same number of arguments are are not specified at all. | |
f4780cbe ZJS |
1204 | n_pcr_pub = None if opts.pcr_public_keys is None else len(opts.pcr_public_keys) |
1205 | n_pcr_priv = None if opts.pcr_private_keys is None else len(opts.pcr_private_keys) | |
1206 | n_phase_path_groups = None if opts.phase_path_groups is None else len(opts.phase_path_groups) | |
1207 | if n_pcr_pub is not None and n_pcr_pub != n_pcr_priv: | |
1208 | raise ValueError('--pcr-public-key= specifications must match --pcr-private-key=') | |
1209 | if n_phase_path_groups is not None and n_phase_path_groups != n_pcr_priv: | |
1210 | raise ValueError('--phases= specifications must match --pcr-private-key=') | |
1211 | ||
5143a47a | 1212 | apply_config(opts) |
f4780cbe | 1213 | |
5143a47a | 1214 | finalize_options(opts) |
f4780cbe ZJS |
1215 | |
1216 | return opts | |
1217 | ||
1218 | ||
1219 | def main(): | |
1220 | opts = parse_args() | |
1221 | check_inputs(opts) | |
1222 | make_uki(opts) | |
1223 | ||
1224 | ||
1225 | if __name__ == '__main__': | |
1226 | main() |