[isar-cip-core][PATCH 8/8] Use of snakeoil keys for qemu use case

From: sven.schultschik@siemens.com
To: cip-dev@lists.cip-project.org
Cc: jan.kiszka@siemens.com, Sven Schultschik <sven.schultschik@siemens.com>
Subject: [isar-cip-core][PATCH 8/8] Use of snakeoil keys for qemu use case
Date: Sun, 20 Nov 2022 21:47:11 +0100	[thread overview]
Message-ID: <20221120204711.5826-9-sven.schultschik@siemens.com> (raw)
In-Reply-To: <20221120204711.5826-1-sven.schultschik@siemens.com>

From: Sven Schultschik <sven.schultschik@siemens.com>

The snakeoil keys are copied to the deploy folder if machine is qemu-arm64. The RPMB qemu workaround is not persistent and for that the keys need to be provisioned on every boot of quemu. Therefor the keys are copied to the deploy folder, mounted into the qemu as virtual memory and the boot command automatically loads them on every boot.

Signed-off-by: Sven Schultschik <sven.schultschik@siemens.com>
---
 recipes-bsp/u-boot/u-boot-qemu-common.inc     |  4 ++++
 .../secure-boot-secrets.inc                   | 22 +++++++++++++++++++
 start-qemu.sh                                 |  3 ++-
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/recipes-bsp/u-boot/u-boot-qemu-common.inc b/recipes-bsp/u-boot/u-boot-qemu-common.inc
index 6e7158b..51dabac 100644
--- a/recipes-bsp/u-boot/u-boot-qemu-common.inc
+++ b/recipes-bsp/u-boot/u-boot-qemu-common.inc
@@ -18,6 +18,10 @@ SRC_URI_append_secureboot = " \
 
 DEPENDS_append_secureboot = " optee-os-${MACHINE}"
 
+do_prepare_build_append_secureboot() {
+    sed -i 's/CONFIG_BOOTCOMMAND="/CONFIG_BOOTCOMMAND="fatload virtio 1:1 40000000 PK\.auth; setenv -e -nv -bs -rt -at -i 40000000:\$filesize PK; fatload virtio 1:1 40000000 KEK\.auth; setenv -e -nv -bs -rt -at -i 40000000:\$filesize KEK; fatload virtio 1:1 40000000 db\.auth; setenv -e -nv -bs -rt -at -i 40000000:\$filesize db; /g' ${S}/configs/${U_BOOT_CONFIG}
+}
+
 do_deploy[dirs] = "${DEPLOY_DIR_IMAGE}"
 do_deploy() {
     dpkg --fsys-tarfile "${WORKDIR}/u-boot-${MACHINE}_${PV}_${DISTRO_ARCH}.deb" | \
diff --git a/recipes-devtools/secure-boot-secrets/secure-boot-secrets.inc b/recipes-devtools/secure-boot-secrets/secure-boot-secrets.inc
index 2a30f1e..0fcde72 100644
--- a/recipes-devtools/secure-boot-secrets/secure-boot-secrets.inc
+++ b/recipes-devtools/secure-boot-secrets/secure-boot-secrets.inc
@@ -53,3 +53,25 @@ do_install() {
 do_prepare_build_append() {
     echo "Provides: secure-boot-secrets" >> ${S}/debian/control
 }
+
+do_deploy[dirs] = "${DEPLOY_DIR_IMAGE}"
+do_deploy() {
+    if [ "${MACHINE}" = "qemu-arm64" ]; then
+        DTARGET=${DEPLOY_DIR_IMAGE}/keys
+        mkdir -p ${DTARGET}
+        cp ${WORKDIR}/${SB_PK}.auth ${DTARGET}/PK.auth
+        cp ${WORKDIR}/${SB_PK}.crt ${DTARGET}/PK.crt
+        cp ${WORKDIR}/${SB_PK}.esl ${DTARGET}/PK.esl
+        cp ${WORKDIR}/${SB_PK}.key ${DTARGET}/PK.key
+        cp ${WORKDIR}/${SB_KEK}.auth ${DTARGET}/KEK.auth
+        cp ${WORKDIR}/${SB_KEK}.crt ${DTARGET}/KEK.crt
+        cp ${WORKDIR}/${SB_KEK}.esl ${DTARGET}/KEK.esl
+        cp ${WORKDIR}/${SB_KEK}.key ${DTARGET}/KEK.key
+        cp ${WORKDIR}/${SB_DB}.auth ${DTARGET}/db.auth
+        cp ${WORKDIR}/${SB_DB}.crt ${DTARGET}/db.crt
+        cp ${WORKDIR}/${SB_DB}.esl ${DTARGET}/db.esl
+        cp ${WORKDIR}/${SB_DB}.key ${DTARGET}/db.key
+    fi
+}
+
+addtask deploy after do_dpkg_build before do_deploy_deb
\ No newline at end of file
diff --git a/start-qemu.sh b/start-qemu.sh
index 5617a2a..f29b57d 100755
--- a/start-qemu.sh
+++ b/start-qemu.sh
@@ -183,7 +183,8 @@ if [ -n "${SECURE_BOOT}${SWUPDATE_BOOT}" ]; then
 			${QEMU_PATH}${QEMU} \
 				-drive file=${IMAGE_PREFIX}.wic,discard=unmap,if=none,id=disk,format=raw \
 				-bios ${u_boot_bin} \
-				${QEMU_COMMON_OPTIONS} "$@"
+				${QEMU_COMMON_OPTIONS} "$@" \
+				-hdb fat:rw:./build/tmp/deploy/images/qemu-${QEMU_ARCH}/keys
 			;;
 		*)
 			echo "Unsupported architecture: ${arch}"
-- 
2.30.2


