From 9b2ecee0ff83e38d2faac77a6247b3418d43ff98 Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Sun, 6 Mar 2022 17:20:17 +0200
Subject: feat: add script to install SSH authorized_keys file

Sponsored-by: author
---
 set-authorized-keys | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100755 set-authorized-keys

diff --git a/set-authorized-keys b/set-authorized-keys
new file mode 100755
index 0000000..2151bc9
--- /dev/null
+++ b/set-authorized-keys
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+set -eu -o pipefail
+
+die() {
+	echo "ERROR: $*" 1>&2
+	exit 1
+}
+
+cleanup() {
+	umount "$drive" || true
+	rmdir "$mnt"
+}
+
+trap cleanup EXIT
+
+drive="$1"
+pubkey="$2"
+
+[ -e "$drive" ] || die "$drive does not exist"
+[ -e "$pubkey" ] || die "$pubkey does not exist"
+
+mnt="$(mktemp -d)"
+mount "$drive" "$mnt"
+if [ ! -e "$mnt/root/.ssh" ]; then
+	install -d "$mnt/root/.ssh"
+fi
+
+authz="$mnt/root/.ssh/authorized_keys"
+[ ! -e "$authz" ] || die "$authz already exists"
+install -m 0600 "$pubkey" "$authz"
-- 
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