similar to: AuthorizedKeysCommand

Hi guys, It might be nice if AuthorizedKeysCommand would receive the fingerprint of the offered key as an argument, so that programs like gitolite could implement more refined key-based identity lookup that offers better performance than AuthorizedKeysFile's linear scan. The following patch is untested but is the basic idea: diff -ru openssh-6.2p1/auth2-pubkey.c

I see that support for AuthorizedKeysCommand has been added. The arguments supplied to the command is just the authenticating user. Can we add the SSH connection details (ie. source and destination IPs and ports) as well? This command seems to be the idea way of requiring one set of credentials from inside an organisation (say the user's own authorized_keys file) and another set from outside

On Thu, Jul 7, 2016 at 10:00 AM, Bruce F Bading <badingb at us.ibm.com> wrote: > > Hi Gentlemen, > > Thank you both for your valued opinion. I do however agree that public key > authentication cannot be fully considered MFA as have 2 PCI QSAs I have > spoken with. This is because it is not enforceable server side. Many > things can affect client side security. >

Hi, I just commited the patch on https://bugzilla.mindrot.org/b/1663 It adds an AuthorizedKeysCommand option to sshd_config to use helper program to fetch a user's authorized keys. Quite a few people have asked for this to allow storage of public keys in LDAP or other databases. The program is executed (directly, not via the shell) with a single argument of the user being logged in. It

Hi Using SSH_ORIGINAL_COMMAND in AuthorizedKeys is so helpful, I'd like to know if it might be possible to access it in the AuthorizedKeysCommand context (via env ?). Is this possible ? can anybody give me advice on going into this ? If possible, I'll use this SSH_ORIGINAL_COMMAND to send client specifics information to the AuthorizedKeysCommand script. Currently, the only alternative

Peter and Jason, thanks for your replies on this. I was able to accomplish this with a combination of Peter's solution and setting "AuthorizedKeysFile none" as suggested in the Stack Overflow question. On Wed, Mar 6, 2019 at 2:30 PM Peter Moody <mindrot at hda3.com> wrote: > > why aren't the authorized keys/principals commands sufficient? > > $ getent group

Hello, Currently OpenSSH has a fixed order on how the key authenticates the user: at first it tries to authenticate against TrustedUserCAKeys, afterwards it does it against the output keys from the AuthorizedKeysCommand and finally against the files as set in AuthorizedKeysFile. I have an use-case where this order is not ideal. This is because in my case the command fetches keys from the cloud

Hi, I've been kicking this idea around, and the problem with it escapes me. I'm looking for someone to tell me why this is a bad idea. The new OpenSSH includes the AuthorizedKeysCommand, which was mostly added to let people use a command to look up user keys in LDAP. LDAP key lookup have some limitations -- specifically, the common openssh-lpk_openldap schema won't let you add

On Sat, Jul 9, 2016 at 10:30 AM, Ben Lindstrom <mouring at eviladmin.org> wrote: > You'd do this by either moving the authorized_keys to another a root owned > location using "AuthorizedKeysFile" (e.g. AuthorizedKeysFile > /etc/ssh/keys/authorized_keys.%u). Or you use "AuthorizedKeysCommand" and > put the keys into a "database" to reference

Hello, how can I dynamically allow or disallow users with OpenSSH? I have some nodes that users can submit jobs to, and can optionally be handed a session to the requested node. But I want to prevent them from SSH-ing in to nodes unless they have a job running on that node. My idea was to implement libssh's callback abilities and have a script that checks the username against jobs running on

AFAIK everything you described here could be done using the AuthorizedKeysCommand or AuthorizedPrincipalsCommand directives. These can emit authorized_keys options (inc. permitopen) as well as the allowed keys/principals. On Sun, 12 Nov 2023, Bret Giddings wrote: > Hi OpenSSH devs, > > I?m wondering if the following has any merit and can be done securely ... > > If you could

Hi OpenSSH devs, I?m wondering if the following has any merit and can be done securely ... If you could match on principals in the sshd_config, then (for example) on a gateway machine, you could have something like /etc/ssh/authorized_keys/sshfwd: cert-authority,principals=?batcha-fwd,batchb-fwd? ... /etc/ssh/sshd_config containing: Match User sshfwd PubkeyAuthentication yes

Hi, is there a particular reason why this feature is "user" based and not "user-pubkey" based? What I mean is that it works for installation with small number of pubkeys per user. But imagine i.e. a GitHub scale - all users logging in as user "git". On each auth request all the keys from database would be fetched and feeded to OpenSSH. Now I am only asking this out

https://bugzilla.mindrot.org/show_bug.cgi?id=2161 Bug ID: 2161 Summary: AuthorizedKeysCommand is not executed when defined inside Match block Product: Portable OpenSSH Version: -current Hardware: All OS: Linux Status: NEW Severity: normal Priority: P5 Component: sshd

I don't see a way to do this currently (unless I am missing something) but I would like to be able to specify, that in order for a user to login, they need to use at least 1 public key from 2 separate key sources.? Specifically this would be when using "AuthenticationMethods publickey,publickey".? Right now requiring 2 public keys for authentication will allow 2 public keys from

https://bugzilla.mindrot.org/show_bug.cgi?id=2755 Bug ID: 2755 Summary: [PATCH] sshd_config: allow directories in AuthorizedKeysFile= Product: Portable OpenSSH Version: 7.5p1 Hardware: All OS: Linux Status: NEW Severity: enhancement Priority: P5 Component: ssh

https://bugzilla.mindrot.org/show_bug.cgi?id=2618 Bug ID: 2618 Summary: net-misc/openssh-7.2_p2: Terribly slow Interactive Logon Product: Portable OpenSSH Version: 7.2p2 Hardware: amd64 OS: Linux Status: NEW Severity: major Priority: P5 Component: sshd

On 08/03/16 02:12, Darren Tucker wrote: > On Wed, Aug 3, 2016 at 7:42 AM, rl <rainer.laatsch at t-online.de> wrote: > [...] >> /Data/openssh-7.3p1/DESTDIR/usr/local/sbin/sshd -p 222 -f \n >> DESTDIR/usr/local/etc/sshd_config > > It looks like you have an embedded newline in the config file name > you're passing to sshd. If that's the case I'm

Hi, I'm attempting to test the AuthorizedKeysCommand feature with the new port of ssh-ldap-wrapper to OpenBSD. I'm running yesterday's OpenBSD-current i386 snapshot, which includes AuthorizedKeysCommand. The port of ssh-ldap-helper (at http://old.nabble.com/-new--ssh-ldap-helper-td34667413.html) contains all the bits I need, and the individual pieces appear to work once configured:

Hi, I have a setup in which I run sshd as unprivileged user at dedicated port to serve specific application. It is working perfectly! One tweak I had to do, since the AuthorizedKeysCommand feature requires file to be owned by root, I had to use root owned command at root owned directory, although it does not add a security value. At auth2-pubkey.c::user_key_command_allowed2(), we have the