"""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', 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, keyid, armor=True): """Export GPG public key to a file""" cmd = '%s --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): """Sign RPM files""" cmd = self.rpm_bin + " --addsign --define '_gpg_name %s' " % keyid cmd += "--define '_gpg_passphrase %s' " % passphrase 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) status, output = oe.utils.getstatusoutput(cmd) 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', '--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 dots = self.get_gpg_version().split('.') assert len(dots) >= 2 if int(dots[0]) >= 2 and int(dots[1]) >= 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) if job.returncode: raise bb.build.FuncFailed("GPG exited with code %d: %s" % (job.returncode, stderr)) 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""" import subprocess try: return subprocess.check_output((self.gpg_bin, "--version")).split()[2] 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 " 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)