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feat(ssh-agent): allow using external helper to ask for passwords (#7631)

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Simone Gaiarin 2021-08-26 11:42:17 +02:00 committed by GitHub
parent c47ac2d86d
commit 5a9d9553cd
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2 changed files with 83 additions and 54 deletions
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9
plugins/ssh-agent/README.md
View file

@ -55,6 +55,15 @@ ssh-add -K -c -a /run/user/1000/ssh-auth <identities>
For valid `ssh-add` arguments run `ssh-add --help` or `man ssh-add`.
----
To set an **external helper** to ask for the passwords and possibly store
them in the system keychain use the `helper` style. For example:
```zsh
zstyle :omz:plugins:ssh-agent helper ksshaskpass
```
## Credits
Based on code from Joseph M. Reagle: https://www.cygwin.com/ml/cygwin/2001-06/msg00537.html

26
plugins/ssh-agent/ssh-agent.plugin.zsh
View file

@ -27,7 +27,7 @@ function _add_identities() {
# key list found on `ssh-add` man page's DESCRIPTION section
for id in id_rsa id_dsa id_ecdsa id_ed25519 identity; do
# check if file exists
[[ -f "$HOME/.ssh/$id" ]] && identities+=$id
[[ -f "$HOME/.ssh/$id" ]] && identities+=($id)
done
fi
@ -44,13 +44,33 @@ function _add_identities() {
# check for filename match, otherwise try for signature match
if [[ ${loaded_ids[(I)$HOME/.ssh/$id]} -le 0 ]]; then
sig="$(ssh-keygen -lf "$HOME/.ssh/$id" | awk '{print $2}')"
[[ ${loaded_sigs[(I)$sig]} -le 0 ]] && not_loaded+="$HOME/.ssh/$id"
[[ ${loaded_sigs[(I)$sig]} -le 0 ]] && not_loaded+=("$HOME/.ssh/$id")
fi
done
# abort if no identities need to be loaded
if [[ ${#not_loaded} -eq 0 ]]; then
return
fi
# pass extra arguments to ssh-add
local args
zstyle -a :omz:plugins:ssh-agent ssh-add-args args
[[ -n "$not_loaded" ]] && ssh-add "${args[@]}" ${^not_loaded}
# use user specified helper to ask for password (ksshaskpass, etc)
local helper
zstyle -s :omz:plugins:ssh-agent helper helper
if [[ -n "$helper" ]]; then
if [[ -z "${commands[$helper]}" ]]; then
echo "ssh-agent: the helper '$helper' has not been found."
else
SSH_ASKPASS="$helper" ssh-add "${args[@]}" ${^not_loaded} < /dev/null
return $?
fi
fi
ssh-add "${args[@]}" ${^not_loaded}
}
# Get the filename to store/lookup the environment from