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Subject: Re: [bug#55055] [PATCH] gnu: wireguard: Add support for PresharedKey
From: Maxime Devos <maximedevos@HIDDEN>
To: Paul Alesius <paul@HIDDEN>, 55055 <at> debbugs.gnu.org
Date: Thu, 21 Apr 2022 16:25:53 +0200
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Paul Alesius schreef op do 21-04-2022 om 15:26 [+0200]:
> + (preshared-key wireguard-peer-preshared-key
> + (default #f)) ;string
This should be documented in the documentation, otherwise it will be
difficult to discover. Also, #f is not a string, did you mean
=E2=80=98;#f|string=E2=80=99?
Also, a limitation: the preshared key will end up in the store, and
hence be world-readable. So other users on the same system (other
people or compromised system daemons) could now determine the preshared
key.
Questions:
* Could the security limitation be documented?
* What security impact does a leaked secret key have?
* Does wireguard has some inclusion mechanism, such that the
wireguard configuration can =E2=80=98include=E2=80=99 some file outside=
the store?
* WDYT of verifying that the preshared key looks =E2=80=98reasonable=E2=
=80=99
(I guess only a-z0-9 characters, no spaces or newlines, not a
bytevector ...)
As-is, if I do (preshared-keys (string->utf8 "oops I thought this
needs to be bytevector)) then "guix system reconfigure" doesn't
give a nice error message, it will just silently produce a broken
configuration file.
Greetings,
Maxime.
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guix-patches@HIDDEN:bug#55055; Package guix-patches.
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This patch adds support for configuring a PresharedKey attribute. Tested, working. With regards, - Paul --000000000000f03c8405dd2a10d5 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div>The WireGuard configuration supports a PresharedKey a= ttribute for additional security. This patch adds support for configuring a= PresharedKey attribute.<br></div><div><br></div><div>Tested, working.</div= ><div><br></div><div>With regards,</div><div>- Paul<br></div></div> --000000000000f03c8405dd2a10d5-- --000000000000f03c8605dd2a10d7 Content-Type: application/octet-stream; name="guix.wg-psk.patch" Content-Disposition: attachment; filename="guix.wg-psk.patch" Content-Transfer-Encoding: base64 Content-ID: <f_l291aw2s0> X-Attachment-Id: f_l291aw2s0 ZGlmZiAtLWdpdCBhL2dudS9zZXJ2aWNlcy92cG4uc2NtIGIvZ251L3NlcnZpY2VzL3Zwbi5zY20K aW5kZXggYjI0ZTljZmZiMy4uZTNmNWZmMGQwNSAxMDA2NDQKLS0tIGEvZ251L3NlcnZpY2VzL3Zw bi5zY20KKysrIGIvZ251L3NlcnZpY2VzL3Zwbi5zY20KQEAgLTYyLDYgKzYyLDcgQEAgKGRlZmlu ZS1tb2R1bGUgKGdudSBzZXJ2aWNlcyB2cG4pCiAgICAgICAgICAgICB3aXJlZ3VhcmQtcGVlci1h bGxvd2VkLWlwcwogICAgICAgICAgICAgd2lyZWd1YXJkLXBlZXItcHVibGljLWtleQogICAgICAg ICAgICAgd2lyZWd1YXJkLXBlZXIta2VlcC1hbGl2ZQorICAgICAgICAgICAgd2lyZWd1YXJkLXBl ZXItcHJlc2hhcmVkLWtleQogCiAgICAgICAgICAgICB3aXJlZ3VhcmQtY29uZmlndXJhdGlvbgog ICAgICAgICAgICAgd2lyZWd1YXJkLWNvbmZpZ3VyYXRpb24/CkBAIC03MDEsNiArNzAyLDggQEAg KGRlZmluZS1yZWNvcmQtdHlwZSogPHdpcmVndWFyZC1wZWVyPgogICAoZW5kcG9pbnQgICAgICAg ICAgd2lyZWd1YXJkLXBlZXItZW5kcG9pbnQKICAgICAgICAgICAgICAgICAgICAgIChkZWZhdWx0 ICNmKSkgICAgIDtzdHJpbmcKICAgKHB1YmxpYy1rZXkgICAgICAgIHdpcmVndWFyZC1wZWVyLXB1 YmxpYy1rZXkpICAgO3N0cmluZworICAocHJlc2hhcmVkLWtleSAgICAgd2lyZWd1YXJkLXBlZXIt cHJlc2hhcmVkLWtleQorICAgICAgICAgICAgICAgICAgICAgKGRlZmF1bHQgI2YpKSAgIDtzdHJp bmcKICAgKGFsbG93ZWQtaXBzICAgICAgIHdpcmVndWFyZC1wZWVyLWFsbG93ZWQtaXBzKSA7bGlz dCBvZiBzdHJpbmdzCiAgIChrZWVwLWFsaXZlICAgICAgICB3aXJlZ3VhcmQtcGVlci1rZWVwLWFs aXZlCiAgICAgICAgICAgICAgICAgICAgICAoZGVmYXVsdCAjZikpKSAgICA7aW50ZWdlcgpAQCAt NzI3LDE2ICs3MzAsMjAgQEAgKGRlZmluZSAod2lyZWd1YXJkLWNvbmZpZ3VyYXRpb24tZmlsZSBj b25maWcpCiAgIChkZWZpbmUgKHBlZXItPmNvbmZpZyBwZWVyKQogICAgIChsZXQgKChuYW1lICh3 aXJlZ3VhcmQtcGVlci1uYW1lIHBlZXIpKQogICAgICAgICAgIChwdWJsaWMta2V5ICh3aXJlZ3Vh cmQtcGVlci1wdWJsaWMta2V5IHBlZXIpKQorICAgICAgICAgIChwcmVzaGFyZWQta2V5ICh3aXJl Z3VhcmQtcGVlci1wcmVzaGFyZWQta2V5IHBlZXIpKQogICAgICAgICAgIChlbmRwb2ludCAod2ly ZWd1YXJkLXBlZXItZW5kcG9pbnQgcGVlcikpCiAgICAgICAgICAgKGFsbG93ZWQtaXBzICh3aXJl Z3VhcmQtcGVlci1hbGxvd2VkLWlwcyBwZWVyKSkKICAgICAgICAgICAoa2VlcC1hbGl2ZSAod2ly ZWd1YXJkLXBlZXIta2VlcC1hbGl2ZSBwZWVyKSkpCiAgICAgICAoZm9ybWF0ICNmICJbUGVlcl0g I35hCiBQdWJsaWNLZXkgPSB+YQogQWxsb3dlZElQcyA9IH5hCi1+YX5hIgorfmF+YX5hIgogICAg ICAgICAgICAgICBuYW1lCiAgICAgICAgICAgICAgIHB1YmxpYy1rZXkKICAgICAgICAgICAgICAg KHN0cmluZy1qb2luIGFsbG93ZWQtaXBzICIsIikKKyAgICAgICAgICAgICAgKGlmIHByZXNoYXJl ZC1rZXkKKyAgICAgICAgICAgICAgICAgIChmb3JtYXQgI2YgIlByZXNoYXJlZEtleSA9IH5hXG4i IHByZXNoYXJlZC1rZXkpCisgICAgICAgICAgICAgICAgICAiIikKICAgICAgICAgICAgICAgKGlm IGVuZHBvaW50CiAgICAgICAgICAgICAgICAgICAoZm9ybWF0ICNmICJFbmRwb2ludCA9IH5hXG4i IGVuZHBvaW50KQogICAgICAgICAgICAgICAgICAgIiIpCg== --000000000000f03c8605dd2a10d7--
Paul Alesius <paul@HIDDEN>:guix-patches@HIDDEN.
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