Mercurial > hg
view mercurial/pushkey.py @ 31290:f819aa9dbbf9
sslutil: issue warning when [hostfingerprint] is used
Mercurial 3.9 added the [hostsecurity] section, which is better
than [hostfingerprints] in every way.
One of the ways that [hostsecurity] is better is that it supports
SHA-256 and SHA-512 fingerprints, not just SHA-1 fingerprints.
The world is moving away from SHA-1 because it is borderline
secure. Mercurial should be part of that movement.
This patch adds a warning when a valid SHA-1 fingerprint from
the [hostfingerprints] section is being used. The warning informs
users to switch to [hostsecurity]. It even prints the config
option they should set. It uses the SHA-256 fingerprint because
recommending a SHA-1 fingerprint in 2017 would be ill-advised.
The warning will print itself on every connection to a server until
it is fixed. There is no way to suppress the warning. I admit this
is annoying. But given the security implications of sticking with
SHA-1, I think this is justified. If this patch is accepted,
I'll likely send a follow-up to start warning on SHA-1
certificates in [hostsecurity] as well. Then sometime down
the road, we can drop support for SHA-1 fingerprints.
Credit for this idea comes from timeless in issue 5466.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 09 Mar 2017 20:33:29 -0800 |
parents | 7b200566e474 |
children | 57875cf423c9 |
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# pushkey.py - dispatching for pushing and pulling keys # # Copyright 2010 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import from . import ( bookmarks, encoding, obsolete, phases, ) def _nslist(repo): n = {} for k in _namespaces: n[k] = "" if not obsolete.isenabled(repo, obsolete.exchangeopt): n.pop('obsolete') return n _namespaces = {"namespaces": (lambda *x: False, _nslist), "bookmarks": (bookmarks.pushbookmark, bookmarks.listbookmarks), "phases": (phases.pushphase, phases.listphases), "obsolete": (obsolete.pushmarker, obsolete.listmarkers), } def register(namespace, pushkey, listkeys): _namespaces[namespace] = (pushkey, listkeys) def _get(namespace): return _namespaces.get(namespace, (lambda *x: False, lambda *x: {})) def push(repo, namespace, key, old, new): '''should succeed iff value was old''' pk = _get(namespace)[0] return pk(repo, key, old, new) def list(repo, namespace): '''return a dict''' lk = _get(namespace)[1] return lk(repo) encode = encoding.fromlocal decode = encoding.tolocal def encodekeys(keys): """encode the content of a pushkey namespace for exchange over the wire""" return '\n'.join(['%s\t%s' % (encode(k), encode(v)) for k, v in keys]) def decodekeys(data): """decode the content of a pushkey namespace from exchange over the wire""" result = {} for l in data.splitlines(): k, v = l.split('\t') result[decode(k)] = decode(v) return result