72 lines
2.6 KiB
Bash
Executable file
72 lines
2.6 KiB
Bash
Executable file
#!/bin/bash
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# === add-auth-keys ===
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# refreshes ~/.ssh/authorized_keys from the list of pub-keys
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# part of the gitosis-lite (GL) suite
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# how run: manual, by GL admin
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# when: anytime a pubkey is added/deleted
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# (i.e., contents of ~/.gitosis-lite/pubkeys change)
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# input: ~/.gitosis-lite/pubkeys
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# output: ~/.ssh/authorized_keys
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# security:
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# - touches a very critical system file that manages the restrictions on
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# incoming users. Be sure to audit AUTH_COMMAND and AUTH_OPTIONS (see
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# below) on any change to this script
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# - no security checks within program. The GL admin runs this manually
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# robustness:
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# - if the "start" line exists, but the "end" line does not, you lose the
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# rest of the existing authkey file. In general, "don't do that (TM)",
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# but we do have a "vim -d" popping up so you can see the changes being
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# made, just in case...
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# other notes:
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# - you do NOT need to run this for permission changes within
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# gitosis-lite.conf, (like giving an *existing* user new rights)
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# - keys are added/deleted from the keystore **manually**, and all keys
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# are named "name.pub"
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# command and options for authorized_keys
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AUTH_COMMAND=~/.gitosis-lite/myecho
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AUTH_OPTIONS="no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty"
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# save existing authkeys minus the GL-added stuff
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sed -e '/^# gitosis-lite start/,/^# gitosis-lite end/d' \
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< ~/.ssh/authorized_keys \
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> ~/.ssh/new_authkeys
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# add our "start" line, each key on its own line (prefixed by command and
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# options, in the standard ssh authorized_keys format), then the "end" line.
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echo "# gitosis-lite start" >> ~/.ssh/new_authkeys
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cd ~/.gitosis-lite/pubkeys
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for i in *.pub
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do
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j=${i%.pub}
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echo -n "command=\"$AUTH_COMMAND $j\",$AUTH_OPTIONS "
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cat $i
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done >> ~/.ssh/new_authkeys
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echo "# gitosis-lite end" >> ~/.ssh/new_authkeys
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# just so you can see what changes are being made
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vim -d ~/.ssh/authorized_keys ~/.ssh/new_authkeys
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# all done; overwrite the file (use cat to avoid perm changes)
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cat ~/.ssh/new_authkeys > ~/.ssh/authorized_keys
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rm ~/.ssh/new_authkeys
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# if the gl admin directory (~/.gitosis-lite) is itself a git repo, do an
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# autocheckin. nothing fancy; this is a "just in case" type of thing.
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cd ~/.gitosis-lite
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if [[ -d .git ]]
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then
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git add -A pubkeys # stage all changes in pubkeys
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if ! git diff --cached --quiet # and if there are any
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then
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echo pubkeys changed # create a commit message
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echo
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git diff --cached --name-status
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fi | git commit -F - # and commit
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fi
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