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ssh-agent: check for loaded id filenames first (#7521)

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This change makes the plugin check if an identity is loaded by looking
first at the key filename reported by `ssh-add -l`. This fixes the use
case where ssh-keygen is not able to output the fingerprint of a key,
such as the one reported on #7516.

Now, for an identity to be passed onto ssh-add, it has to fail the
match for a loaded identity, both filename and signature.
This commit is contained in:
Marc Cornellà 2019-01-21 20:31:30 +01:00 committed by GitHub
parent b9670d0409
commit c494869632
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 11 deletions
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22
plugins/ssh-agent/ssh-agent.plugin.zsh
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@ -13,7 +13,7 @@ function _start_agent() {
function _add_identities() {
local id line sig
local -a identities loaded not_loaded signatures
local -a identities loaded_sigs loaded_ids not_loaded
zstyle -a :omz:plugins:ssh-agent identities identities
# check for .ssh folder presence
@ -31,19 +31,19 @@ function _add_identities() {
done
fi
# get list of loaded identities' signatures
for line in ${(f)"$(ssh-add -l)"}; do loaded+=${${(z)line}[2]}; done
# get signatures of private keys
for id in $identities; do
signatures+="$(ssh-keygen -lf "$HOME/.ssh/$id" | awk '{print $2}') $id"
# get list of loaded identities' signatures and filenames
for line in ${(f)"$(ssh-add -l)"}; do
loaded_sigs+=${${(z)line}[2]}
loaded_ids+=${${(z)line}[3]}
done
# add identities if not already loaded
for sig in $signatures; do
id="$(cut -f2 <<< $sig)"
sig="$(cut -f1 <<< $sig)"
[[ ${loaded[(I)$sig]} -le 0 ]] && not_loaded+="$HOME/.ssh/$id"
for id in $identities; do
# 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"
fi
done
[[ -n "$not_loaded" ]] && ssh-add ${^not_loaded}