Add provisioning with CA

3 files changed, 85 insertions, 1 deletions

diff --git a/recipes-sota/aktualizr/aktualizr-ca-implicit-prov.bb b/recipes-sota/aktualizr/aktualizr-ca-implicit-prov.bb
new file mode 100644
index 0000000..51e313d
--- /dev/null
+++ b/recipes-sota/aktualizr/aktualizr-ca-implicit-prov.bb
@@ -0,0 +1,72 @@
+SUMMARY = "Aktualizr configuration for implicit provisioning with CA"
+DESCRIPTION = "Systemd service and configurations for implicitly provisioning Aktualizr using externally provided or generated CA"
+
+# WARNING: it is NOT a production solution. The secure way to provision devices is to create certificate request directly on the device
+#  (either with HSM/TPM or with software) and then sign it with a CA stored on a disconnected machine
+
+HOMEPAGE = "https://github.com/advancedtelematic/aktualizr"
+SECTION = "base"
+LICENSE = "MPL-2.0"
+LIC_FILES_CHKSUM = "file://${WORKDIR}/LICENSE;md5=9741c346eef56131163e13b9db1241b3"
+
+DEPENDS = "aktualizr-native openssl-native"
+RDEPENDS_${PN} = "aktualizr"
+
+SRC_URI = " \
+  file://LICENSE \
+  file://ca.cnf \
+  "
+PV = "1.0"
+PR = "1"
+
+require environment.inc
+require credentials.inc
+
+export SOTA_CACERT_PATH
+export SOTA_CAKEY_PATH
+
+do_install() {
+    install -d ${D}${libdir}/sota
+
+    if [ -z "${SOTA_PACKED_CREDENTIALS}" ]; then
+        bberror "SOTA_PACKED_CREDENTIALS are required for implicit provisioning"
+    fi
+
+    if [ -z ${SOTA_CACERT_PATH} ]; then
+        SOTA_CACERT_PATH=${DEPLOY_DIR_IMAGE}/CA/cacert.pem
+        SOTA_CAKEY_PATH=${DEPLOY_DIR_IMAGE}/CA/ca.private.pem
+        mkdir -p ${DEPLOY_DIR_IMAGE}/CA
+        bbwarn "SOTA_CACERT_PATH is not specified, use default one at $SOTA_CACERT_PATH" 
+
+        if [ ! -f ${SOTA_CACERT_PATH} ]; then
+            bbwarn "${SOTA_CACERT_PATH} does not exist, generate a new CA"
+            SOTA_CACERT_DIR_PATH="$(dirname "$SOTA_CACERT_PATH")"
+            openssl genrsa -out ${SOTA_CACERT_DIR_PATH}/ca.private.pem 4096
+            openssl req -key ${SOTA_CACERT_DIR_PATH}/ca.private.pem -new -x509 -days 7300 -out ${SOTA_CACERT_PATH} -subj "/C=DE/ST=Berlin/O=Reis und Kichererbsen e.V/commonName=meta-updater" -batch -config ${WORKDIR}/ca.cnf -extensions cacert
+            bbwarn "${SOTA_CACERT_PATH} has been created, you'll need to upload it to the server"
+        fi
+    fi
+
+    if [ -z ${SOTA_CAKEY_PATH} ]; then
+        bberror "SOTA_CAKEY_PATH should be set when using implicit provisioning"
+    fi
+
+    install -d ${D}${libdir}/sota
+    install -d ${D}${localstatedir}/sota
+    install -m 0644 ${STAGING_DIR_NATIVE}${libdir}/sota/sota_implicit_prov_ca.toml ${D}${libdir}/sota/sota.toml
+    aktualizr_cert_provider --credentials ${SOTA_PACKED_CREDENTIALS} \
+                            --device-ca ${SOTA_CACERT_PATH} \
+                            --device-ca-key ${SOTA_CAKEY_PATH} \
+                            --root-ca \
+                            --server-url \
+                            --local ${D}${localstatedir}/sota \
+                            --config ${D}${libdir}/sota/sota.toml
+}
+
+FILES_${PN} = " \
+                ${localstatedir}/sota/* \
+                ${libdir}/sota/sota.toml \
+                ${libdir}/sota/root.crt \
+                "
+
+# vim:set ts=4 sw=4 sts=4 expandtab:
diff --git a/recipes-sota/aktualizr/aktualizr_git.bb b/recipes-sota/aktualizr/aktualizr_git.bb
index 5ce8b84..0aeac0f 100644
--- a/recipes-sota/aktualizr/aktualizr_git.bb
+++ b/recipes-sota/aktualizr/aktualizr_git.bb
@@ -38,12 +38,12 @@ EXTRA_OECMAKE_append_class-target = " -DBUILD_OSTREE=ON -DBUILD_ISOTP=ON ${@bb.u
 EXTRA_OECMAKE_append_class-native = " -DBUILD_SOTA_TOOLS=ON -DBUILD_OSTREE=OFF "
 
 do_install_append () {
-    rm -f ${D}${bindir}/aktualizr_cert_provider
     rm -fr ${D}${libdir}/systemd
 }
 do_install_append_class-target () {
     rm -f ${D}${bindir}/aktualizr_implicit_writer
     rm -f ${D}${libdir}/sota/sota.toml
+    rm -f ${D}${bindir}/aktualizr_cert_provider
     ${@bb.utils.contains('SOTA_CLIENT_FEATURES', 'secondary-example', '', 'rm -f ${D}${bindir}/example-interface', d)}
     ${@bb.utils.contains('SOTA_CLIENT_FEATURES', 'secondary-isotp-example', '', 'rm -f ${D}${bindir}/isotp-test-interface', d)}
 
@@ -51,6 +51,7 @@ do_install_append_class-target () {
     aktualizr_service=${@bb.utils.contains('SOTA_CLIENT_FEATURES', 'serialcan', '${WORKDIR}/aktualizr-serialcan.service', '${WORKDIR}/aktualizr.service', d)}
     install -m 0644 ${aktualizr_service} ${D}${systemd_unitdir}/system/aktualizr.service
 }
+
 do_install_append_class-native () {
     rm -f ${D}${bindir}/aktualizr
     rm -f ${D}${bindir}/aktualizr-info
@@ -59,6 +60,7 @@ do_install_append_class-native () {
     install -m 0644 ${S}/config/sota_autoprov.toml ${D}/${libdir}/sota/sota_autoprov.toml
     install -m 0644 ${S}/config/sota_hsm_prov.toml ${D}/${libdir}/sota/sota_hsm_prov.toml
     install -m 0644 ${S}/config/sota_implicit_prov.toml ${D}/${libdir}/sota/sota_implicit_prov.toml
+    install -m 0644 ${S}/config/sota_implicit_prov_ca.toml ${D}/${libdir}/sota/sota_implicit_prov_ca.toml
 
     install -m 0755 ${B}/src/sota_tools/garage-sign-prefix/src/garage-sign/bin/* ${D}${bindir}
     install -m 0644 ${B}/src/sota_tools/garage-sign-prefix/src/garage-sign/lib/* ${D}${libdir}
diff --git a/recipes-sota/aktualizr/files/ca.cnf b/recipes-sota/aktualizr/files/ca.cnf
new file mode 100644
index 0000000..352ec38
--- /dev/null
+++ b/recipes-sota/aktualizr/files/ca.cnf
@@ -0,0 +1,10 @@
+[req]
+req_extensions = cacert
+distinguished_name = req_distinguished_name
+
+[req_distinguished_name]
+
+[cacert]
+basicConstraints = critical,CA:true
+keyUsage = keyCertSign
+