Script to add a certificate to various stores on webOS (probably 3.5+ only)

setup-cert-overlay.sh

#!/bin/sh

# by throwaway96
# licensed under AGPLv3+
# https://gist.github.com/throwaway96/bb31a17562eec4d8325020dee8c7e6b5

cert=/home/root/something.crt
name=lol_hax
file="${name}.pem"
tmp="/tmp/tempcert.pem.${$}"
overlay_root=/home/root/overlay

if ! test -f "${cert}"; then
	echo >&2 "${0}: cert does not exist"
	exit 1
fi

sed -e 's/\r$//' -- "${cert}" >"${tmp}"

do_overlay() {
	if test "${#}" -eq 2; then
		callback="${2}"
	elif test "${#}" -eq 1; then
		callback=''
	else
		return 1
	fi

	target="${1}"

	if test ! -d "${target}"; then
		echo >&2 "target '${target}' does not exist; skipping"
		return
	fi

	overlay_id="$(realpath "${target}" | tr -s '/' '_')"
	mount_source="overlay${overlay_id}"

	if findmnt -n --source "${mount_source}" >/dev/null; then
		umount -- "${mount_source}"
	fi

	lowerdir="${overlay_root}/${overlay_id}"

	rm -rf -- "${lowerdir}"
	mkdir -p -- "${lowerdir}"

	if test -n "${callback}"; then
		(cd "${lowerdir}" && "${callback}" "${target}")
	fi

	# may only work on webOS 3.5+ (Linux kernel 4.0+)
	mount -t overlay -o "ro,lowerdir=${lowerdir}:${target}" "${mount_source}" "${target}"
}

cb_certs() {
	source="${1:-/etc/ssl/certs}"
	hash_old="$(openssl x509 -in "${tmp}" -noout -subject_hash_old).0"
	hash="$(openssl x509 -in "${tmp}" -noout -subject_hash).0"
	cp -- "${tmp}" "./${file}"
	ln -sf -- "${file}" "${hash_old}"
	ln -sf -- "${file}" "${hash}"
	cat -- "${source}/ca-certificates.crt" "${tmp}" >ca-certificates.crt
}

do_overlay /etc/ssl/certs cb_certs
do_overlay /var/palm/jail/com.webos.app.browser/etc/ssl/certs cb_certs

cb_sdp() {
	source="${1:-/usr/share/ca-certificates/sdp}"
	cat -- "${source}/sdp-ca.pem" "${tmp}" >sdp-ca.pem
}

do_overlay /usr/share/ca-certificates/sdp cb_sdp

cb_nssdb() {
	source="${1:-/etc/pki/nssdb}"
	cp -- "${source}/"* .
	certutil -A -d . -a -t 'C,,' -n "${name}" -i "${tmp}"
}

if test -d /etc/pki/nssdb; then
	do_overlay /etc/pki/nssdb cb_nssdb
fi

rm -f -- "${tmp}"

# vim: noet:ts=8:sw=8

nice