SSH server checking public keys from another source
In an ssh connection with key authentication the user sends the ID of the public key he wants to use. Then, the server checks the authorized_keys file for the publick key.
I'd like the server to not look for that ID in the authorized_keys file, but using the user name to retrieve the key from another source (e.g. a databse, another file, a remote server etc.)
Is it possible to do that?
ssh ssh-keys authorized-keys
asked Dec 4 at 12:35
Federico Taschin
133
add a comment |
In an ssh connection with key authentication the user sends the ID of the public key he wants to use. Then, the server checks the authorized_keys file for the publick key.
I'd like the server to not look for that ID in the authorized_keys file, but using the user name to retrieve the key from another source (e.g. a databse, another file, a remote server etc.)
Is it possible to do that?
ssh ssh-keys authorized-keys
asked Dec 4 at 12:35
Federico Taschin
133
add a comment |
In an ssh connection with key authentication the user sends the ID of the public key he wants to use. Then, the server checks the authorized_keys file for the publick key.
I'd like the server to not look for that ID in the authorized_keys file, but using the user name to retrieve the key from another source (e.g. a databse, another file, a remote server etc.)
Is it possible to do that?
ssh ssh-keys authorized-keys
asked Dec 4 at 12:35
Federico Taschin
133
In an ssh connection with key authentication the user sends the ID of the public key he wants to use. Then, the server checks the authorized_keys file for the publick key.
I'd like the server to not look for that ID in the authorized_keys file, but using the user name to retrieve the key from another source (e.g. a databse, another file, a remote server etc.)
Is it possible to do that?
ssh ssh-keys authorized-keys
ssh ssh-keys authorized-keys
asked Dec 4 at 12:35
Federico Taschin
133
asked Dec 4 at 12:35
Federico Taschin
133
asked Dec 4 at 12:35
Federico Taschin
133
asked Dec 4 at 12:35
Federico Taschin
133
asked Dec 4 at 12:35
Federico Taschin
133
133
add a comment |
add a comment |
1 Answer
1
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To change the file path, you can specify the AuthorizedKeysFile option in sshd_config (assuming the server runs OpenSSH). You can give multiple paths, either relative to the user's home directory, or absolute paths with %u expanding to the username.
For example, to keep the default authorized_keys location and add a file in /etc:
AuthorizedKeysFile .ssh/authorized_keys /etc/ssh/users/%u.txt
To use an external command, if the server is using OpenSSH 6.2 or later, you can specify AuthorizedKeysCommand in the server's sshd_config file, pointing to a custom program or script.
The program will be run on every login, receive a username as command-line parameter, and needs to output a list of keys for that user (using the same format as authorized_keys) via stdout.
For example, if you are using LDAP, the SSSD LDAP client already includes a tool sss_ssh_authorizedkeys for retrieving keys from the user's sshPublicKey attribute.
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
AuthorizedKeysCommandUser nobody
answered Dec 4 at 12:43
grawity
231k35487544
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
add a comment |
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1 Answer
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1 Answer
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oldest
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votes
To change the file path, you can specify the AuthorizedKeysFile option in sshd_config (assuming the server runs OpenSSH). You can give multiple paths, either relative to the user's home directory, or absolute paths with %u expanding to the username.
For example, to keep the default authorized_keys location and add a file in /etc:
AuthorizedKeysFile .ssh/authorized_keys /etc/ssh/users/%u.txt
To use an external command, if the server is using OpenSSH 6.2 or later, you can specify AuthorizedKeysCommand in the server's sshd_config file, pointing to a custom program or script.
The program will be run on every login, receive a username as command-line parameter, and needs to output a list of keys for that user (using the same format as authorized_keys) via stdout.
For example, if you are using LDAP, the SSSD LDAP client already includes a tool sss_ssh_authorizedkeys for retrieving keys from the user's sshPublicKey attribute.
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
AuthorizedKeysCommandUser nobody
answered Dec 4 at 12:43
grawity
231k35487544
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
add a comment |
To change the file path, you can specify the AuthorizedKeysFile option in sshd_config (assuming the server runs OpenSSH). You can give multiple paths, either relative to the user's home directory, or absolute paths with %u expanding to the username.
For example, to keep the default authorized_keys location and add a file in /etc:
AuthorizedKeysFile .ssh/authorized_keys /etc/ssh/users/%u.txt
To use an external command, if the server is using OpenSSH 6.2 or later, you can specify AuthorizedKeysCommand in the server's sshd_config file, pointing to a custom program or script.
The program will be run on every login, receive a username as command-line parameter, and needs to output a list of keys for that user (using the same format as authorized_keys) via stdout.
For example, if you are using LDAP, the SSSD LDAP client already includes a tool sss_ssh_authorizedkeys for retrieving keys from the user's sshPublicKey attribute.
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
AuthorizedKeysCommandUser nobody
answered Dec 4 at 12:43
grawity
231k35487544
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
add a comment |
To change the file path, you can specify the AuthorizedKeysFile option in sshd_config (assuming the server runs OpenSSH). You can give multiple paths, either relative to the user's home directory, or absolute paths with %u expanding to the username.
For example, to keep the default authorized_keys location and add a file in /etc:
AuthorizedKeysFile .ssh/authorized_keys /etc/ssh/users/%u.txt
To use an external command, if the server is using OpenSSH 6.2 or later, you can specify AuthorizedKeysCommand in the server's sshd_config file, pointing to a custom program or script.
The program will be run on every login, receive a username as command-line parameter, and needs to output a list of keys for that user (using the same format as authorized_keys) via stdout.
For example, if you are using LDAP, the SSSD LDAP client already includes a tool sss_ssh_authorizedkeys for retrieving keys from the user's sshPublicKey attribute.
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
AuthorizedKeysCommandUser nobody
answered Dec 4 at 12:43
grawity
231k35487544
To change the file path, you can specify the AuthorizedKeysFile option in sshd_config (assuming the server runs OpenSSH). You can give multiple paths, either relative to the user's home directory, or absolute paths with %u expanding to the username.
For example, to keep the default authorized_keys location and add a file in /etc:
AuthorizedKeysFile .ssh/authorized_keys /etc/ssh/users/%u.txt
To use an external command, if the server is using OpenSSH 6.2 or later, you can specify AuthorizedKeysCommand in the server's sshd_config file, pointing to a custom program or script.
The program will be run on every login, receive a username as command-line parameter, and needs to output a list of keys for that user (using the same format as authorized_keys) via stdout.
For example, if you are using LDAP, the SSSD LDAP client already includes a tool sss_ssh_authorizedkeys for retrieving keys from the user's sshPublicKey attribute.
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
AuthorizedKeysCommandUser nobody
answered Dec 4 at 12:43
grawity
231k35487544
answered Dec 4 at 12:43
grawity
231k35487544
answered Dec 4 at 12:43
grawity
231k35487544
answered Dec 4 at 12:43
grawity
231k35487544
231k35487544
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
add a comment |
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
That's what I needed, thanks!
– Federico Taschin
Dec 4 at 16:13
add a comment |
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