# Copyright 2005, 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
'''commands to sign and verify changesets'''
from __future__ import absolute_import
import binascii
import os
from mercurial.i18n import _
from mercurial import (
cmdutil,
error,
help,
match,
node as hgnode,
pycompat,
registrar,
)
from mercurial.utils import (
dateutil,
procutil,
)
cmdtable = {}
command = registrar.command(cmdtable)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = b'ships-with-hg-core'
configtable = {}
configitem = registrar.configitem(configtable)
configitem(
b'gpg', b'cmd', default=b'gpg',
)
configitem(
b'gpg', b'key', default=None,
)
configitem(
b'gpg', b'.*', default=None, generic=True,
)
# Custom help category
_HELP_CATEGORY = b'gpg'
help.CATEGORY_ORDER.insert(
help.CATEGORY_ORDER.index(registrar.command.CATEGORY_HELP), _HELP_CATEGORY
)
help.CATEGORY_NAMES[_HELP_CATEGORY] = b'Signing changes (GPG)'
class gpg(object):
def __init__(self, path, key=None):
self.path = path
self.key = (key and b" --local-user \"%s\"" % key) or b""
def sign(self, data):
gpgcmd = b"%s --sign --detach-sign%s" % (self.path, self.key)
return procutil.filter(data, gpgcmd)
def verify(self, data, sig):
""" returns of the good and bad signatures"""
sigfile = datafile = None
try:
# create temporary files
fd, sigfile = pycompat.mkstemp(prefix=b"hg-gpg-", suffix=b".sig")
fp = os.fdopen(fd, 'wb')
fp.write(sig)
fp.close()
fd, datafile = pycompat.mkstemp(prefix=b"hg-gpg-", suffix=b".txt")
fp = os.fdopen(fd, 'wb')
fp.write(data)
fp.close()
gpgcmd = (
b"%s --logger-fd 1 --status-fd 1 --verify \"%s\" \"%s\""
% (self.path, sigfile, datafile,)
)
ret = procutil.filter(b"", gpgcmd)
finally:
for f in (sigfile, datafile):
try:
if f:
os.unlink(f)
except OSError:
pass
keys = []
key, fingerprint = None, None
for l in ret.splitlines():
# see DETAILS in the gnupg documentation
# filter the logger output
if not l.startswith(b"[GNUPG:]"):
continue
l = l[9:]
if l.startswith(b"VALIDSIG"):
# fingerprint of the primary key
fingerprint = l.split()[10]
elif l.startswith(b"ERRSIG"):
key = l.split(b" ", 3)[:2]
key.append(b"")
fingerprint = None
elif (
l.startswith(b"GOODSIG")
or l.startswith(b"EXPSIG")
or l.startswith(b"EXPKEYSIG")
or l.startswith(b"BADSIG")
):
if key is not None:
keys.append(key + [fingerprint])
key = l.split(b" ", 2)
fingerprint = None
if key is not None:
keys.append(key + [fingerprint])
return keys
def newgpg(ui, **opts):
"""create a new gpg instance"""
gpgpath = ui.config(b"gpg", b"cmd")
gpgkey = opts.get('key')
if not gpgkey:
gpgkey = ui.config(b"gpg", b"key")
return gpg(gpgpath, gpgkey)
def sigwalk(repo):
"""
walk over every sigs, yields a couple
((node, version, sig), (filename, linenumber))
"""
def parsefile(fileiter, context):
ln = 1
for l in fileiter:
if not l:
continue
yield (l.split(b" ", 2), (context, ln))
ln += 1
# read the heads
fl = repo.file(b".hgsigs")
for r in reversed(fl.heads()):
fn = b".hgsigs|%s" % hgnode.short(r)
for item in parsefile(fl.read(r).splitlines(), fn):
yield item
try:
# read local signatures
fn = b"localsigs"
for item in parsefile(repo.vfs(fn), fn):
yield item
except IOError:
pass
def getkeys(ui, repo, mygpg, sigdata, context):
"""get the keys who signed a data"""
fn, ln = context
node, version, sig = sigdata
prefix = b"%s:%d" % (fn, ln)
node = hgnode.bin(node)
data = node2txt(repo, node, version)
sig = binascii.a2b_base64(sig)
keys = mygpg.verify(data, sig)
validkeys = []
# warn for expired key and/or sigs
for key in keys:
if key[0] == b"ERRSIG":
ui.write(_(b"%s Unknown key ID \"%s\"\n") % (prefix, key[1]))
continue
if key[0] == b"BADSIG":
ui.write(_(b"%s Bad signature from \"%s\"\n") % (prefix, key[2]))
continue
if key[0] == b"EXPSIG":
ui.write(
_(b"%s Note: Signature has expired (signed by: \"%s\")\n")
% (prefix, key[2])
)
elif key[0] == b"EXPKEYSIG":
ui.write(
_(b"%s Note: This key has expired (signed by: \"%s\")\n")
% (prefix, key[2])
)
validkeys.append((key[1], key[2], key[3]))
return validkeys
@command(b"sigs", [], _(b'hg sigs'), helpcategory=_HELP_CATEGORY)
def sigs(ui, repo):
"""list signed changesets"""
mygpg = newgpg(ui)
revs = {}
for data, context in sigwalk(repo):
node, version, sig = data
fn, ln = context
try:
n = repo.lookup(node)
except KeyError:
ui.warn(_(b"%s:%d node does not exist\n") % (fn, ln))
continue
r = repo.changelog.rev(n)
keys = getkeys(ui, repo, mygpg, data, context)
if not keys:
continue
revs.setdefault(r, [])
revs[r].extend(keys)
for rev in sorted(revs, reverse=True):
for k in revs[rev]:
r = b"%5d:%s" % (rev, hgnode.hex(repo.changelog.node(rev)))
ui.write(b"%-30s %s\n" % (keystr(ui, k), r))
@command(b"sigcheck", [], _(b'hg sigcheck REV'), helpcategory=_HELP_CATEGORY)
def sigcheck(ui, repo, rev):
"""verify all the signatures there may be for a particular revision"""
mygpg = newgpg(ui)
rev = repo.lookup(rev)
hexrev = hgnode.hex(rev)
keys = []
for data, context in sigwalk(repo):
node, version, sig = data
if node == hexrev:
k = getkeys(ui, repo, mygpg, data, context)
if k:
keys.extend(k)
if not keys:
ui.write(_(b"no valid signature for %s\n") % hgnode.short(rev))
return
# print summary
ui.write(_(b"%s is signed by:\n") % hgnode.short(rev))
for key in keys:
ui.write(b" %s\n" % keystr(ui, key))
def keystr(ui, key):
"""associate a string to a key (username, comment)"""
keyid, user, fingerprint = key
comment = ui.config(b"gpg", fingerprint)
if comment:
return b"%s (%s)" % (user, comment)
else:
return user
@command(
b"sign",
[
(b'l', b'local', None, _(b'make the signature local')),
(b'f', b'force', None, _(b'sign even if the sigfile is modified')),
(
b'',
b'no-commit',
None,
_(b'do not commit the sigfile after signing'),
),
(b'k', b'key', b'', _(b'the key id to sign with'), _(b'ID')),
(b'm', b'message', b'', _(b'use text as commit message'), _(b'TEXT')),
(b'e', b'edit', False, _(b'invoke editor on commit messages')),
]
+ cmdutil.commitopts2,
_(b'hg sign [OPTION]... [REV]...'),
helpcategory=_HELP_CATEGORY,
)
def sign(ui, repo, *revs, **opts):
"""add a signature for the current or given revision
If no revision is given, the parent of the working directory is used,
or tip if no revision is checked out.
The ``gpg.cmd`` config setting can be used to specify the command
to run. A default key can be specified with ``gpg.key``.
See :hg:`help dates` for a list of formats valid for -d/--date.
"""
with repo.wlock():
return _dosign(ui, repo, *revs, **opts)
def _dosign(ui, repo, *revs, **opts):
mygpg = newgpg(ui, **opts)
opts = pycompat.byteskwargs(opts)
sigver = b"0"
sigmessage = b""
date = opts.get(b'date')
if date:
opts[b'date'] = dateutil.parsedate(date)
if revs:
nodes = [repo.lookup(n) for n in revs]
else:
nodes = [
node for node in repo.dirstate.parents() if node != hgnode.nullid
]
if len(nodes) > 1:
raise error.Abort(
_(b'uncommitted merge - please provide a specific revision')
)
if not nodes:
nodes = [repo.changelog.tip()]
for n in nodes:
hexnode = hgnode.hex(n)
ui.write(
_(b"signing %d:%s\n") % (repo.changelog.rev(n), hgnode.short(n))
)
# build data
data = node2txt(repo, n, sigver)
sig = mygpg.sign(data)
if not sig:
raise error.Abort(_(b"error while signing"))
sig = binascii.b2a_base64(sig)
sig = sig.replace(b"\n", b"")
sigmessage += b"%s %s %s\n" % (hexnode, sigver, sig)
# write it
if opts[b'local']:
repo.vfs.append(b"localsigs", sigmessage)
return
if not opts[b"force"]:
msigs = match.exact([b'.hgsigs'])
if any(repo.status(match=msigs, unknown=True, ignored=True)):
raise error.Abort(
_(b"working copy of .hgsigs is changed "),
hint=_(b"please commit .hgsigs manually"),
)
sigsfile = repo.wvfs(b".hgsigs", b"ab")
sigsfile.write(sigmessage)
sigsfile.close()
if b'.hgsigs' not in repo.dirstate:
repo[None].add([b".hgsigs"])
if opts[b"no_commit"]:
return
message = opts[b'message']
if not message:
# we don't translate commit messages
message = b"\n".join(
[
b"Added signature for changeset %s" % hgnode.short(n)
for n in nodes
]
)
try:
editor = cmdutil.getcommiteditor(
editform=b'gpg.sign', **pycompat.strkwargs(opts)
)
repo.commit(
message, opts[b'user'], opts[b'date'], match=msigs, editor=editor
)
except ValueError as inst:
raise error.Abort(pycompat.bytestr(inst))
def node2txt(repo, node, ver):
"""map a manifest into some text"""
if ver == b"0":
return b"%s\n" % hgnode.hex(node)
else:
raise error.Abort(_(b"unknown signature version"))
def extsetup(ui):
# Add our category before "Repository maintenance".
help.CATEGORY_ORDER.insert(
help.CATEGORY_ORDER.index(command.CATEGORY_MAINTENANCE), _HELP_CATEGORY
)
help.CATEGORY_NAMES[_HELP_CATEGORY] = b'GPG signing'