From a1235a25b44cf58577d065132909d68ef5c6ea00 Mon Sep 17 00:00:00 2001
From: Matej Focko <me@mfocko.xyz>
Date: Wed, 6 Sep 2023 11:42:26 +0200
Subject: [PATCH] fix(user/secrets/hcv): include vssh script

Signed-off-by: Matej Focko <me@mfocko.xyz>
---
 roles/user/secrets/hcv/files/vssh.sh  | 31 +++++++++++++++++++++++++++
 roles/user/secrets/hcv/tasks/main.yml |  7 ++++++
 roles/user/shell/zsh/files/zshrc      | 10 ++++++---
 3 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 roles/user/secrets/hcv/files/vssh.sh

diff --git a/roles/user/secrets/hcv/files/vssh.sh b/roles/user/secrets/hcv/files/vssh.sh
new file mode 100644
index 0000000..20d102c
--- /dev/null
+++ b/roles/user/secrets/hcv/files/vssh.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# create a temporary directory for an SSH key
+SSH_KEY_DIR=$(mktemp -d)
+
+# if no path to the key exists, create a temporary one
+if [[ $SSH_KEY_PATH == "" ]]; then
+  SSH_KEY_PATH=$SSH_KEY_DIR/id_ed25519
+  ssh-keygen -q -t ed25519 -N "" -f $SSH_KEY_PATH
+fi
+
+vault ssh \
+  -no-exec \
+  -field=signed_key \
+  -mode=ca \
+  -role="$VSSH_ROLE" \
+  -valid-principals="$VSSH_PRINCIPALS" \
+  -public-key-path=$SSH_KEY_PATH.pub \
+  -private-key-path=$SSH_KEY_PATH \
+  localhost > $SSH_KEY_PATH.pub.signed
+chmod 400 $SSH_KEY_PATH.pub.signed
+
+# DEBUG
+ssh-keygen -L -f $SSH_KEY_PATH.pub.signed
+
+# execute the SSH
+ssh -i $SSH_KEY_PATH -i $SSH_KEY_PATH.pub.signed $@
+
+# delete the signed key and temporary key if exists
+rm -f $SSH_KEY_PATH.pub.signed
+rm -rf $SSH_KEY_DIR
diff --git a/roles/user/secrets/hcv/tasks/main.yml b/roles/user/secrets/hcv/tasks/main.yml
index 57ec067..0ea6c5c 100644
--- a/roles/user/secrets/hcv/tasks/main.yml
+++ b/roles/user/secrets/hcv/tasks/main.yml
@@ -14,3 +14,10 @@
 - name: Install HC Vault to userspace
   ansible.builtin.include_tasks: install_user.yml
   when: ansible_distribution not in [ "AlmaLinux", "CentOS", "Fedora", "Ubuntu"]
+
+- name: Install ‹vssh› script
+  ansible.builtin.copy:
+    src: files/vssh.sh
+    dest: ~/.local/bin/vssh
+    mode: 0700
+    creates: ~/.local/bin/vssh
diff --git a/roles/user/shell/zsh/files/zshrc b/roles/user/shell/zsh/files/zshrc
index 06d232a..22a0e3c 100644
--- a/roles/user/shell/zsh/files/zshrc
+++ b/roles/user/shell/zsh/files/zshrc
@@ -78,7 +78,7 @@ alias bwvps='ln -sf $HOME/.config/Bitwarden\ CLI/{vault.mfocko.xyz,data}.json'
 function gen_pass() {
     LENGTH=12
     if [[ -n $1 ]]; then
-	LENGTH=$1
+    LENGTH=$1
     fi
 
     bw generate -uln --length $LENGTH
@@ -87,19 +87,23 @@ function gen_pass() {
 function gen_passphrase() {
     LENGTH=2
     if [[ -n $1 ]]; then
-	LENGTH=$1
+    LENGTH=$1
     fi
 
     bw generate -p --words $LENGTH
 }
 
-# HashiCorp Vault
+### HashiCorp Vault ###
 export VAULT_ADDR="https://hvault.mfocko.xyz"
 function hcvu() {
     local PASS=$(yad --text "Password for HashiCorp Vault @ mfocko.xyz:" --center --button "yad-ok" --entry --hide-text)
     vault login -method=userpass -no-print username=$(whoami) password=$PASS
 }
 
+# SSH variables for HashiCorp Vault
+export VSSH_ROLE=$(whoami)
+export VSSH_PRINCIPALS="$(whoami),me@mfocko.xyz"
+
 ### public_html ###
 function from_phrase() {
     bw list items --search $2 | jq --raw-output ".[] | select(.folderId == \"$1\") | .fields[] | select(.value == \"$3\") | .name"