125 lines
4.8 KiB
Python
125 lines
4.8 KiB
Python
|
"""Helper module for GPG signing"""
|
||
|
|
import os
|
||
|
|
|
||
|
|
import bb
|
||
|
|
import oe.utils
|
||
|
|
|
||
|
|
class LocalSigner(object):
|
||
|
|
"""Class for handling local (on the build host) signing"""
|
||
|
|
def __init__(self, d):
|
||
|
|
self.gpg_bin = d.getVar('GPG_BIN') or \
|
||
|
|
bb.utils.which(os.getenv('PATH'), 'gpg')
|
||
|
|
self.gpg_path = d.getVar('GPG_PATH')
|
||
|
|
self.gpg_version = self.get_gpg_version()
|
||
|
|
self.rpm_bin = bb.utils.which(os.getenv('PATH'), "rpmsign")
|
||
|
|
|
||
|
|
def export_pubkey(self, output_file, keyid, armor=True):
|
||
|
|
"""Export GPG public key to a file"""
|
||
|
|
cmd = '%s --no-permission-warning --batch --yes --export -o %s ' % \
|
||
|
|
(self.gpg_bin, output_file)
|
||
|
|
if self.gpg_path:
|
||
|
|
cmd += "--homedir %s " % self.gpg_path
|
||
|
|
if armor:
|
||
|
|
cmd += "--armor "
|
||
|
|
cmd += keyid
|
||
|
|
status, output = oe.utils.getstatusoutput(cmd)
|
||
|
|
if status:
|
||
|
|
raise bb.build.FuncFailed('Failed to export gpg public key (%s): %s' %
|
||
|
|
(keyid, output))
|
||
|
|
|
||
|
|
def sign_rpms(self, files, keyid, passphrase, digest, sign_chunk, fsk=None, fsk_password=None):
|
||
|
|
"""Sign RPM files"""
|
||
|
|
|
||
|
|
cmd = self.rpm_bin + " --addsign --define '_gpg_name %s' " % keyid
|
||
|
|
gpg_args = '--no-permission-warning --batch --passphrase=%s' % passphrase
|
||
|
|
if self.gpg_version > (2,1,):
|
||
|
|
gpg_args += ' --pinentry-mode=loopback'
|
||
|
|
cmd += "--define '_gpg_sign_cmd_extra_args %s' " % gpg_args
|
||
|
|
cmd += "--define '_binary_filedigest_algorithm %s' " % digest
|
||
|
|
if self.gpg_bin:
|
||
|
|
cmd += "--define '__gpg %s' " % self.gpg_bin
|
||
|
|
if self.gpg_path:
|
||
|
|
cmd += "--define '_gpg_path %s' " % self.gpg_path
|
||
|
|
if fsk:
|
||
|
|
cmd += "--signfiles --fskpath %s " % fsk
|
||
|
|
if fsk_password:
|
||
|
|
cmd += "--define '_file_signing_key_password %s' " % fsk_password
|
||
|
|
|
||
|
|
# Sign in chunks
|
||
|
|
for i in range(0, len(files), sign_chunk):
|
||
|
|
status, output = oe.utils.getstatusoutput(cmd + ' '.join(files[i:i+sign_chunk]))
|
||
|
|
if status:
|
||
|
|
raise bb.build.FuncFailed("Failed to sign RPM packages: %s" % output)
|
||
|
|
|
||
|
|
def detach_sign(self, input_file, keyid, passphrase_file, passphrase=None, armor=True):
|
||
|
|
"""Create a detached signature of a file"""
|
||
|
|
import subprocess
|
||
|
|
|
||
|
|
if passphrase_file and passphrase:
|
||
|
|
raise Exception("You should use either passphrase_file of passphrase, not both")
|
||
|
|
|
||
|
|
cmd = [self.gpg_bin, '--detach-sign', '--no-permission-warning', '--batch',
|
||
|
|
'--no-tty', '--yes', '--passphrase-fd', '0', '-u', keyid]
|
||
|
|
|
||
|
|
if self.gpg_path:
|
||
|
|
cmd += ['--homedir', self.gpg_path]
|
||
|
|
if armor:
|
||
|
|
cmd += ['--armor']
|
||
|
|
|
||
|
|
#gpg > 2.1 supports password pipes only through the loopback interface
|
||
|
|
#gpg < 2.1 errors out if given unknown parameters
|
||
|
|
if self.gpg_version > (2,1,):
|
||
|
|
cmd += ['--pinentry-mode', 'loopback']
|
||
|
|
|
||
|
|
cmd += [input_file]
|
||
|
|
|
||
|
|
try:
|
||
|
|
if passphrase_file:
|
||
|
|
with open(passphrase_file) as fobj:
|
||
|
|
passphrase = fobj.readline();
|
||
|
|
|
||
|
|
job = subprocess.Popen(cmd, stdin=subprocess.PIPE, stderr=subprocess.PIPE)
|
||
|
|
(_, stderr) = job.communicate(passphrase.encode("utf-8"))
|
||
|
|
|
||
|
|
if job.returncode:
|
||
|
|
raise bb.build.FuncFailed("GPG exited with code %d: %s" %
|
||
|
|
(job.returncode, stderr.decode("utf-8")))
|
||
|
|
|
||
|
|
except IOError as e:
|
||
|
|
bb.error("IO error (%s): %s" % (e.errno, e.strerror))
|
||
|
|
raise Exception("Failed to sign '%s'" % input_file)
|
||
|
|
|
||
|
|
except OSError as e:
|
||
|
|
bb.error("OS error (%s): %s" % (e.errno, e.strerror))
|
||
|
|
raise Exception("Failed to sign '%s" % input_file)
|
||
|
|
|
||
|
|
|
||
|
|
def get_gpg_version(self):
|
||
|
|
"""Return the gpg version as a tuple of ints"""
|
||
|
|
import subprocess
|
||
|
|
try:
|
||
|
|
ver_str = subprocess.check_output((self.gpg_bin, "--version", "--no-permission-warning")).split()[2].decode("utf-8")
|
||
|
|
return tuple([int(i) for i in ver_str.split('.')])
|
||
|
|
except subprocess.CalledProcessError as e:
|
||
|
|
raise bb.build.FuncFailed("Could not get gpg version: %s" % e)
|
||
|
|
|
||
|
|
|
||
|
|
def verify(self, sig_file):
|
||
|
|
"""Verify signature"""
|
||
|
|
cmd = self.gpg_bin + " --verify --no-permission-warning "
|
||
|
|
if self.gpg_path:
|
||
|
|
cmd += "--homedir %s " % self.gpg_path
|
||
|
|
cmd += sig_file
|
||
|
|
status, _ = oe.utils.getstatusoutput(cmd)
|
||
|
|
ret = False if status else True
|
||
|
|
return ret
|
||
|
|
|
||
|
|
|
||
|
|
def get_signer(d, backend):
|
||
|
|
"""Get signer object for the specified backend"""
|
||
|
|
# Use local signing by default
|
||
|
|
if backend == 'local':
|
||
|
|
return LocalSigner(d)
|
||
|
|
else:
|
||
|
|
bb.fatal("Unsupported signing backend '%s'" % backend)
|