From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Tremer <michael.tremer@ipfire.org>
To: development@lists.ipfire.org
Subject: [PATCH] oci: user-data: Try to decode base64 content
Date: Mon, 21 Feb 2022 17:24:56 +0000
Message-ID: <20220221172456.1055696-1-michael.tremer@ipfire.org>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============4013343664869569587=="
List-Id: <development.lists.ipfire.org>

--===============4013343664869569587==
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable

Terraform only supports sending any shell scripts encoded in base64
which is however not required by Oracle. Therefore we have to test if
the script is encoded or not.

Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>
---
 src/initscripts/helper/oci-setup | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/initscripts/helper/oci-setup b/src/initscripts/helper/oci-se=
tup
index 0763a96e7..98b9858d6 100644
--- a/src/initscripts/helper/oci-setup
+++ b/src/initscripts/helper/oci-setup
@@ -15,6 +15,24 @@ get() {
 	wget -qO - "http://169.254.169.254/opc/v1/${file}"
 }
=20
+try_base64_decode() {
+	local input=3D"${1}"
+
+	local tmp=3D"$(mktemp)"
+
+	# Try to decode this and return output if successful
+	if base64 -d <<< "${input}" > "${tmp}" 2>/dev/null; then
+		echo "$(<${tmp})"
+
+	# Otherwise just return the input
+	else
+		echo "${input}"
+	fi
+
+	# Cleanup
+	unlink "${tmp}"
+}
+
 to_address() {
 	local n=3D"${1}"
=20
@@ -115,6 +133,9 @@ import_oci_configuration() {
 		# Download a startup script
 		local script=3D"$(get instance/metadata/user_data)"
=20
+		# Try to decode this
+		script=3D"$(try_base64_decode "${script}")"
+
 		# Execute the script
 		if [ "${script:0:2}" =3D "#!" ]; then
 			echo "${script}" > /tmp/user-data.script
--=20
2.30.2


--===============4013343664869569587==--