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"""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, keyid, passphrase_file):
self.keyid = keyid
self.passphrase_file = passphrase_file
self.gpg_bin = d.getVar('GPG_BIN', True) or \
bb.utils.which(os.getenv('PATH'), 'gpg')
self.gpg_path = d.getVar('GPG_PATH', True)
self.rpm_bin = bb.utils.which(os.getenv('PATH'), "rpm")
def export_pubkey(self, output_file):
"""Export GPG public key to a file"""
cmd = '%s --batch --yes --export --armor -o %s ' % \
(self.gpg_bin, output_file)
if self.gpg_path:
cmd += "--homedir %s " % self.gpg_path
cmd += self.keyid
status, output = oe.utils.getstatusoutput(cmd)
if status:
raise bb.build.FuncFailed('Failed to export gpg public key (%s): %s' %
(self.keyid, output))
def sign_rpms(self, files):
"""Sign RPM files"""
import pexpect
cmd = self.rpm_bin + " --addsign --define '_gpg_name %s' " % self.keyid
if self.gpg_bin:
cmd += "--define '%%__gpg %s' " % self.gpg_bin
if self.gpg_path:
cmd += "--define '_gpg_path %s' " % self.gpg_path
cmd += ' '.join(files)
# Need to use pexpect for feeding the passphrase
proc = pexpect.spawn(cmd)
try:
proc.expect_exact('Enter pass phrase:', timeout=15)
with open(self.passphrase_file) as fobj:
proc.sendline(fobj.readline().rstrip('\n'))
proc.expect(pexpect.EOF, timeout=900)
proc.close()
except pexpect.TIMEOUT as err:
bb.error('rpmsign timeout: %s' % err)
proc.terminate()
if os.WEXITSTATUS(proc.status) or not os.WIFEXITED(proc.status):
bb.error('rpmsign failed: %s' % proc.before.strip())
raise bb.build.FuncFailed("Failed to sign RPM packages")
def detach_sign(self, input_file):
"""Create a detached signature of a file"""
cmd = "%s --detach-sign --armor --batch --no-tty --yes " \
"--passphrase-file '%s' -u '%s' " % \
(self.gpg_bin, self.passphrase_file, self.keyid)
if self.gpg_path:
gpg_cmd += "--homedir %s " % self.gpg_path
cmd += input_file
status, output = oe.utils.getstatusoutput(cmd)
if status:
raise bb.build.FuncFailed("Failed to create signature for '%s': %s" %
(input_file, output))
class ObsSigner(object):
"""Class for handling signing with obs-signd"""
def __init__(self, d, keyid):
self.keyid = keyid
self.rpm_bin = bb.utils.which(os.getenv('PATH'), "rpm")
self.del_old_sign = d.getVar('OBSSIGN_DELSIGN', True) == "1"
def export_pubkey(self, output_file):
"""Export GPG public key to a file"""
cmd = "sign -u '%s' -p" % self.keyid
status, output = oe.utils.getstatusoutput(cmd)
if status:
raise bb.build.FuncFailed('Failed to export gpg public key (%s): %s' %
(self.keyid, output))
with open(output_file, 'w') as fobj:
fobj.write(output)
fobj.write('\n')
def sign_rpms(self, files):
"""Sign RPM files"""
import pexpect
# Remove existing signatures. This is a workaround for a limitation
# of obs-signd: sign is not able to add additional signatures and fails
# if existing signatures are found in the RPM package.
if self.del_old_sign:
cmd = "%s --delsign %s" % (self.rpm_bin, ' '.join(files))
status, output = oe.utils.getstatusoutput(cmd)
if status:
raise bb.build.FuncFailed("Failed to remove RPM signatures: %s" %
output)
# Sign packages
cmd = "sign -u '%s' -r %s" % (self.keyid, ' '.join(files))
status, output = oe.utils.getstatusoutput(cmd)
if status or [line for line in output.splitlines() if line.endswith('already signed')]:
raise bb.build.FuncFailed("Failed to sign RPM packages: %s" %
output)
def detach_sign(self, input_file):
"""Create a detached signature of a file"""
cmd = "sign -u '%s' -d %s" % (self.keyid, input_file)
status, output = oe.utils.getstatusoutput(cmd)
if status:
raise bb.build.FuncFailed("Failed to create signature for '%s': %s" %
(input_file, output))
def get_signer(d, backend, keyid, passphrase_file):
"""Get signer object for the specified backend"""
# Use local signing by default
if backend == 'local':
return LocalSigner(d, keyid, passphrase_file)
elif backend == 'obssign':
if passphrase_file:
bb.note("GPG passphrase file setting not used when 'obssign' "
"backend is used.")
return ObsSigner(d, keyid)
else:
bb.fatal("Unsupported signing backend '%s'" % backend)
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