From: Fabian Stelzer <fs@gigacodes.de>
To: Josh Steadmon <steadmon@google.com>,
Jonathan Tan <jonathantanmy@google.com>,
gitgitgadget@gmail.com, git@vger.kernel.org, hanwen@google.com,
sandals@crustytoothpaste.net, rsbecker@nexbridge.com,
bagasdotme@gmail.com, hji@dyntopia.com, avarab@gmail.com,
felipe.contreras@gmail.com, sunshine@sunshineco.com,
gwymor@tilde.club
Subject: Re: [PATCH v6 3/9] ssh signing: retrieve a default key from ssh-agent
Date: Thu, 29 Jul 2021 23:21:17 +0200 [thread overview]
Message-ID: <655f49be-7752-ca07-e9dd-9923300096ba@gigacodes.de> (raw)
In-Reply-To: <YQL84R7qNv8pnHro@google.com>
On 29.07.21 21:09, Josh Steadmon wrote:
> On 2021.07.29 10:59, Fabian Stelzer wrote:
>> On 29.07.21 00:48, Jonathan Tan wrote:
>>>> if user.signingkey is not set and a ssh signature is requested we call
>>>> ssh-add -L and use the first key we get
>>>
>>> [snip]
>>>
>>> Could the commit message have a better explanation of why we need this?
>>> (Also, I would think that the command being run needs to be configurable
>>> instead of being just the first "ssh-add" in $PATH, and the parsing of
>>> the output should be more rigorous. But this is moot if we don't need
>>> this feature in the first place.)
>>>
>>
>> How about:
>> If user.signingkey ist not set and a ssh signature is requested we call
>> ssh-add -L und use the first key we get. This enables us to activate commit
>> signing globally for all users on a shared server when ssh-agent forwarding
>> is already in use without the need to touch an individual users gitconfig.
>>
>> Maybe a general gpg.ssh.signingKeyDefaultCommand that we call and use the
>> first returned line as key would be useful and achieve the same goal without
>> having this default for everyone.
>> On the other hand i like having less configuration / good defaults for
>> individual users. But I'm coming from a corporate environment, not an open
>> source project.
>
> Doesn't this run the risk of using the wrong key (and potentially
> exposing someone's identity)? On my work machine, my corporate SSH key
> is not actually the first key in my SSH agent.
>
> Rather than making this behavior the default, could it instead be
> enabled only if the signing key is set to "use-ssh-agent" or something
> similar?
>
If we introduce a signingKeyDefaultComand we don't need the
"use-ssh-agent" flag.
If user.signingkey is set it is used no matter what. A private key needs
to be available either in the specified file or via ssh agent.
If it is not set then an automatic way to get a default key would be great.
So if we set signingKeyDefaultCommand to "ssh-add" (or a script
returning a key) then the first available key could be used.
If this variable is unset and no user.signingkey is specified we fail
and tell the user to set a signingkey.
If this variable is set to "ssh-add" by default or unset and needs to be
set explicitly set to have an automatic default key can be decided.
next prev parent reply other threads:[~2021-07-29 21:21 UTC|newest]
Thread overview: 153+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-06 8:19 [PATCH] Add commit & tag signing/verification via SSH keys using ssh-keygen Fabian Stelzer via GitGitGadget
2021-07-06 10:07 ` Han-Wen Nienhuys
2021-07-06 11:23 ` Fabian Stelzer
2021-07-06 14:44 ` brian m. carlson
2021-07-06 15:33 ` Fabian Stelzer
2021-07-06 15:04 ` Junio C Hamano
2021-07-06 15:45 ` Fabian Stelzer
2021-07-06 17:55 ` Junio C Hamano
2021-07-06 19:39 ` Randall S. Becker
2021-07-07 6:26 ` Bagas Sanjaya
2021-07-07 8:48 ` Fabian Stelzer
2021-07-12 12:19 ` [PATCH v2] Add commit, tag & push " Fabian Stelzer via GitGitGadget
2021-07-12 16:55 ` Ævar Arnfjörð Bjarmason
2021-07-12 20:35 ` Fabian Stelzer
2021-07-12 21:16 ` Felipe Contreras
2021-07-14 12:10 ` [PATCH v3 0/9] RFC: Add commit & tag " Fabian Stelzer via GitGitGadget
2021-07-14 12:10 ` [PATCH v3 1/9] Add commit, tag & push signing via SSH keys Fabian Stelzer via GitGitGadget
2021-07-14 18:19 ` Junio C Hamano
2021-07-14 23:57 ` Eric Sunshine
2021-07-15 8:20 ` Fabian Stelzer
2021-07-14 12:10 ` [PATCH v3 2/9] ssh signing: add documentation Fabian Stelzer via GitGitGadget
2021-07-14 20:07 ` Junio C Hamano
2021-07-15 8:48 ` Fabian Stelzer
2021-07-15 10:43 ` Bagas Sanjaya
2021-07-15 16:29 ` Junio C Hamano
2021-07-14 12:10 ` [PATCH v3 3/9] ssh signing: retrieve a default key from ssh-agent Fabian Stelzer via GitGitGadget
2021-07-14 20:20 ` Junio C Hamano
2021-07-15 7:49 ` Han-Wen Nienhuys
2021-07-15 8:06 ` Fabian Stelzer
2021-07-15 8:13 ` Fabian Stelzer
2021-07-14 12:10 ` [PATCH v3 4/9] ssh signing: sign using either gpg or ssh keys Fabian Stelzer via GitGitGadget
2021-07-14 20:32 ` Junio C Hamano
2021-07-15 8:28 ` Fabian Stelzer
2021-07-14 12:10 ` [PATCH v3 5/9] ssh signing: provide a textual representation of the signing key Fabian Stelzer via GitGitGadget
2021-07-14 12:10 ` [PATCH v3 6/9] ssh signing: parse ssh-keygen output and verify signatures Fabian Stelzer via GitGitGadget
2021-07-16 0:07 ` Gwyneth Morgan
2021-07-16 7:00 ` Fabian Stelzer
2021-07-14 12:10 ` [PATCH v3 7/9] ssh signing: add test prereqs Fabian Stelzer via GitGitGadget
2021-07-14 12:10 ` [PATCH v3 8/9] ssh signing: duplicate t7510 tests for commits Fabian Stelzer via GitGitGadget
2021-07-14 12:10 ` [PATCH v3 9/9] ssh signing: add more tests for logs, tags & push certs Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 0/9] ssh signing: Add commit & tag signing/verification via SSH keys using ssh-keygen Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 1/9] ssh signing: preliminary refactoring and clean-up Fabian Stelzer via GitGitGadget
2021-07-19 23:07 ` Junio C Hamano
2021-07-19 13:33 ` [PATCH v4 2/9] ssh signing: add ssh signature format and signing using ssh keys Fabian Stelzer via GitGitGadget
2021-07-19 23:53 ` Junio C Hamano
2021-07-20 12:26 ` Fabian Stelzer
2021-07-19 13:33 ` [PATCH v4 3/9] ssh signing: retrieve a default key from ssh-agent Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 4/9] ssh signing: provide a textual representation of the signing key Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 5/9] ssh signing: parse ssh-keygen output and verify signatures Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 6/9] ssh signing: add test prereqs Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 7/9] ssh signing: duplicate t7510 tests for commits Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 8/9] ssh signing: add more tests for logs, tags & push certs Fabian Stelzer via GitGitGadget
2021-07-19 13:33 ` [PATCH v4 9/9] ssh signing: add documentation Fabian Stelzer via GitGitGadget
2021-07-20 0:38 ` [PATCH v4 0/9] ssh signing: Add commit & tag signing/verification via SSH keys using ssh-keygen Junio C Hamano
2021-07-27 13:15 ` [PATCH v5 " Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 1/9] ssh signing: preliminary refactoring and clean-up Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 2/9] ssh signing: add ssh signature format and signing using ssh keys Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 3/9] ssh signing: retrieve a default key from ssh-agent Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 4/9] ssh signing: provide a textual representation of the signing key Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 5/9] ssh signing: parse ssh-keygen output and verify signatures Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 6/9] ssh signing: add test prereqs Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 7/9] ssh signing: duplicate t7510 tests for commits Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 8/9] ssh signing: add more tests for logs, tags & push certs Fabian Stelzer via GitGitGadget
2021-07-27 13:15 ` [PATCH v5 9/9] ssh signing: add documentation Fabian Stelzer via GitGitGadget
2021-07-28 19:36 ` [PATCH v6 0/9] ssh signing: Add commit & tag signing/verification via SSH keys using ssh-keygen Fabian Stelzer via GitGitGadget
2021-07-28 19:36 ` [PATCH v6 1/9] ssh signing: preliminary refactoring and clean-up Fabian Stelzer via GitGitGadget
2021-07-28 22:32 ` Jonathan Tan
2021-07-29 0:58 ` Junio C Hamano
2021-07-29 7:44 ` Fabian Stelzer
2021-07-29 8:43 ` Fabian Stelzer
2021-07-28 19:36 ` [PATCH v6 2/9] ssh signing: add ssh signature format and signing using ssh keys Fabian Stelzer via GitGitGadget
2021-07-28 22:45 ` Jonathan Tan
2021-07-29 1:01 ` Junio C Hamano
2021-07-29 11:01 ` Fabian Stelzer
2021-07-29 19:09 ` Josh Steadmon
2021-07-29 21:25 ` Fabian Stelzer
2021-07-28 19:36 ` [PATCH v6 3/9] ssh signing: retrieve a default key from ssh-agent Fabian Stelzer via GitGitGadget
2021-07-28 21:29 ` Junio C Hamano
2021-07-28 22:48 ` Jonathan Tan
2021-07-29 8:59 ` Fabian Stelzer
2021-07-29 19:09 ` Josh Steadmon
2021-07-29 19:56 ` Junio C Hamano
2021-07-29 21:21 ` Fabian Stelzer [this message]
2021-07-28 19:36 ` [PATCH v6 4/9] ssh signing: provide a textual representation of the signing key Fabian Stelzer via GitGitGadget
2021-07-28 21:34 ` Junio C Hamano
2021-07-29 8:21 ` Fabian Stelzer
2021-07-28 19:36 ` [PATCH v6 5/9] ssh signing: parse ssh-keygen output and verify signatures Fabian Stelzer via GitGitGadget
2021-07-28 21:55 ` Junio C Hamano
2021-07-29 9:12 ` Fabian Stelzer
2021-07-29 20:43 ` Junio C Hamano
2021-07-28 23:04 ` Jonathan Tan
2021-07-29 9:48 ` Fabian Stelzer
2021-07-29 13:52 ` Fabian Stelzer
2021-08-03 7:43 ` Fabian Stelzer
2021-08-03 9:33 ` Fabian Stelzer
2021-07-29 20:46 ` Junio C Hamano
2021-07-29 21:01 ` Randall S. Becker
2021-07-29 21:12 ` Fabian Stelzer
2021-07-29 21:25 ` Randall S. Becker
2021-07-29 21:28 ` Fabian Stelzer
2021-07-29 22:28 ` Randall S. Becker
2021-07-30 8:17 ` Fabian Stelzer
2021-07-30 14:26 ` Randall S. Becker
2021-07-30 14:32 ` Fabian Stelzer
2021-07-30 15:05 ` Randall S. Becker
2021-07-28 19:36 ` [PATCH v6 6/9] ssh signing: add test prereqs Fabian Stelzer via GitGitGadget
2021-07-29 19:09 ` Josh Steadmon
2021-07-29 19:57 ` Junio C Hamano
2021-07-30 7:32 ` Fabian Stelzer
2021-07-28 19:36 ` [PATCH v6 7/9] ssh signing: duplicate t7510 tests for commits Fabian Stelzer via GitGitGadget
2021-07-28 19:36 ` [PATCH v6 8/9] ssh signing: add more tests for logs, tags & push certs Fabian Stelzer via GitGitGadget
2021-07-28 19:36 ` [PATCH v6 9/9] ssh signing: add documentation Fabian Stelzer via GitGitGadget
2021-07-29 8:19 ` [PATCH v6 0/9] ssh signing: Add commit & tag signing/verification via SSH keys using ssh-keygen Bagas Sanjaya
2021-07-29 11:03 ` Fabian Stelzer
2021-08-03 13:45 ` [PATCH v7 " Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 1/9] ssh signing: preliminary refactoring and clean-up Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 2/9] ssh signing: add test prereqs Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 3/9] ssh signing: add ssh key format and signing code Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 4/9] ssh signing: retrieve a default key from ssh-agent Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 5/9] ssh signing: provide a textual signing_key_id Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 6/9] ssh signing: verify signatures using ssh-keygen Fabian Stelzer via GitGitGadget
2021-08-03 23:47 ` Junio C Hamano
2021-08-04 9:01 ` Fabian Stelzer
2021-08-04 17:32 ` Junio C Hamano
2021-08-03 13:45 ` [PATCH v7 7/9] ssh signing: duplicate t7510 tests for commits Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 8/9] ssh signing: tests for logs, tags & push certs Fabian Stelzer via GitGitGadget
2021-08-03 13:45 ` [PATCH v7 9/9] ssh signing: test that gpg fails for unkown keys Fabian Stelzer via GitGitGadget
2021-08-29 22:15 ` [PATCH v7 0/9] ssh signing: Add commit & tag signing/verification via SSH keys using ssh-keygen Junio C Hamano
2021-08-29 23:56 ` Gwyneth Morgan
2021-08-30 10:35 ` Fabian Stelzer
2021-09-07 17:35 ` Junio C Hamano
2021-09-10 8:03 ` Fabian Stelzer
2021-09-10 18:44 ` Junio C Hamano
2021-09-10 19:49 ` Fabian Stelzer
2021-09-10 20:20 ` Carlo Arenas
2021-09-10 20:07 ` [PATCH v8 " Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 1/9] ssh signing: preliminary refactoring and clean-up Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 2/9] ssh signing: add test prereqs Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 3/9] ssh signing: add ssh key format and signing code Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 4/9] ssh signing: retrieve a default key from ssh-agent Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 5/9] ssh signing: provide a textual signing_key_id Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 6/9] ssh signing: verify signatures using ssh-keygen Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 7/9] ssh signing: duplicate t7510 tests for commits Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 8/9] ssh signing: tests for logs, tags & push certs Fabian Stelzer via GitGitGadget
2021-09-10 20:07 ` [PATCH v8 9/9] ssh signing: test that gpg fails for unknown keys Fabian Stelzer via GitGitGadget
2021-12-22 3:18 ` t7510-signed-commit.sh hangs on old gpg, regression in 1bfb57f642d (was: [PATCH v8 9/9] ssh signing: test that gpg fails for unknown keys) Ævar Arnfjörð Bjarmason
2021-12-22 10:13 ` Fabian Stelzer
2021-12-22 15:58 ` brian m. carlson
2021-12-26 22:53 ` Ævar Arnfjörð Bjarmason
2021-12-30 11:10 ` Fabian Stelzer
2021-09-10 20:23 ` [PATCH v8 0/9] ssh signing: Add commit & tag signing/verification via SSH keys using ssh-keygen Junio C Hamano
2021-09-10 20:48 ` Fabian Stelzer
2021-09-10 21:01 ` Junio C Hamano
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