diff options
Diffstat (limited to 'poky/meta/lib/oe/gpg_sign.py')
-rw-r--r-- | poky/meta/lib/oe/gpg_sign.py | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/poky/meta/lib/oe/gpg_sign.py b/poky/meta/lib/oe/gpg_sign.py new file mode 100644 index 0000000000..b17272928f --- /dev/null +++ b/poky/meta/lib/oe/gpg_sign.py @@ -0,0 +1,128 @@ +"""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") + self.gpg_agent_bin = bb.utils.which(os.getenv('PATH'), "gpg-agent") + + 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 --agent-program=%s|--auto-expand-secmem' % (passphrase, self.gpg_agent_bin) + 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'] + + if self.gpg_agent_bin: + cmd += ["--agent-program=%s|--auto-expand-secmem" % (self.gpg_agent_bin)] + + 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("-")[0].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) |