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154 lines
4.4 KiB
154 lines
4.4 KiB
# -*- coding: utf-8 -*-
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# Copyright 2018 Mir Calculate. http://www.calculate-linux.org
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from .files import (process, getProgPath, makeDirectory,
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removeDir, FilesError)
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import os
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import sys
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_ = lambda x: x
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from ..cl_lang import setLocalTranslate
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setLocalTranslate('cl_lib3', sys.modules[__name__])
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class GPGError(Exception):
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pass
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class GPGKeyExpired(GPGError):
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pass
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class GPGKeyRevoced(GPGError):
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pass
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class GPGNoKey(GPGError):
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pass
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class GPGImportError(GPGError):
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pass
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class Pipe():
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def __init__(self):
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self.outfd, self.infd = os.pipe()
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def write(self, data):
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os.write(self.infd, data)
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def get_filename(self):
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return "/proc/{}/fd/{}".format(os.getpid(), self.outfd)
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def get_fd(self):
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return self.outfd
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, exc_cb):
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self.close()
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def closein(self):
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if self.infd is not None:
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os.close(self.infd)
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self.infd = None
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def close(self):
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self.closein()
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if self.outfd is not None:
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os.close(self.outfd)
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self.outfd = None
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class GPG():
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GNUPREFIX = "[GNUPG:]"
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GOOD_PREFIX = "%s GOODSIG" % GNUPREFIX
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EXPIRED_PREFIX = "%s EXPKEYSIG" % GNUPREFIX
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REVOCED_PREFIX = "%s REVKEYSIG" % GNUPREFIX
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SIGDATA_PREFIX = "%s VALIDSIG" % GNUPREFIX
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def __init__(self, homedir, timeout=20):
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self.homedir = homedir
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self.timeout = timeout
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makeDirectory(self.homedir)
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@property
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def gpgcmd(self):
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cmd = getProgPath("/usr/bin/gpg")
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if not cmd:
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raise GPGError(_("%s command not found"))
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return cmd
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def _spawn_gpg(self, *options):
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if not self.homedir:
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raise GPGError(_("GPG is not initialized"))
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return process(self.gpgcmd, "--status-fd", "1",
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"--batch", "--no-autostart",
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"--homedir", self.homedir, *options,
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timeout=self.timeout)
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def recv_keys(self, keyid):
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return self._spawn_gpg("--recv-keys", keyid).success()
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def import_key(self, keyfile):
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p = self._spawn_gpg("--import")
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try:
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p.write(keyfile)
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if not p.success():
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raise GPGImportError(p.readerr())
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except FilesError as e:
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raise GPGImportError(p.readerr())
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def verify(self, data, sign):
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with Pipe() as signpipe:
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p = self._spawn_gpg("--verify",
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signpipe.get_filename(), "-")
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try:
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signpipe.write(sign)
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signpipe.closein()
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p.write(data)
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except FilesError as e:
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raise GPGError(p.readerr())
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goodsig = False
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sig_data_ok = False
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for l in p:
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if l.startswith(self.GOOD_PREFIX):
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goodsig = True
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if l.startswith(self.EXPIRED_PREFIX):
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raise GPGKeyExpired(p.readerr())
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if l.startswith(self.REVOCED_PREFIX):
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raise GPGKeyRevoced(p.readerr())
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if l.startswith(self.SIGDATA_PREFIX):
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if len(l.split(' ')) >= 12:
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sig_data_ok = True
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if not p.success() or not goodsig or not sig_data_ok:
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if "No public key" in p.readerr():
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raise GPGNoKey(p.readerr())
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else:
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raise GPGError(p.readerr())
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def count_public(self):
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p = self._spawn_gpg("--list-public-keys")
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return len([True for l in p if l.startswith("pub")])
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, exc_cb):
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self.close()
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def close(self):
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if self.homedir and os.path.isdir(self.homedir):
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removeDir(self.homedir)
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self.homedir = None
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