Start creating base images

files/scripts/signmodules.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+# Copyright 2025 Universal Blue
+# Copyright 2025 The Secureblue Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and limitations under the License.
+
+set -oue pipefail
+
+MODULE_NAME="${1-}"
+if [ -z "$MODULE_NAME" ]; then
+  echo "MODULE_NAME is empty. Exiting..."
+  exit 1
+fi
+
+KERNEL_VERSION="$(rpm -q "kernel" --queryformat '%{VERSION}-%{RELEASE}.%{ARCH}')"
+
+PUBLIC_KEY_DER_PATH="../system/etc/pki/akmods/certs/akmods-secureblue.der"
+PUBLIC_KEY_CRT_PATH="./certs/public_key.crt"
+PRIVATE_KEY_PATH="/tmp/certs/private_key.priv"
+openssl x509 -in "$PUBLIC_KEY_DER_PATH" -out "$PUBLIC_KEY_CRT_PATH"
+
+PRIVATE_KEY_PATH="/tmp/certs/private_key.priv"
+SIGNING_KEY="./certs/signing_key.pem"
+cat "$PRIVATE_KEY_PATH" <(echo) "$PUBLIC_KEY_CRT_PATH" >> "$SIGNING_KEY"
+
+for module in /usr/lib/modules/"${KERNEL_VERSION}"/extra/"${MODULE_NAME}"/*.ko*; do
+  module_basename="${module:0:-3}"
+  module_suffix="${module: -3}"
+  if [[ "$module_suffix" == ".xz" ]]; then
+    xz --decompress "$module"
+    openssl cms -sign -signer "${SIGNING_KEY}" -binary -in "$module_basename" -outform DER -out "${module_basename}.cms" -nocerts -noattr -nosmimecap
+    /usr/src/kernels/"${KERNEL_VERSION}"/scripts/sign-file -s "${module_basename}.cms" sha256 "${PUBLIC_KEY_CRT_PATH}" "${module_basename}"
+    /bin/bash ./sign-check.sh "${KERNEL_VERSION}" "${module_basename}" "${PUBLIC_KEY_CRT_PATH}"
+    xz -C crc32 -f "${module_basename}"
+  elif [[ "$module_suffix" == ".gz" ]]; then
+    gzip -d "$module"
+    openssl cms -sign -signer "${SIGNING_KEY}" -binary -in "$module_basename" -outform DER -out "${module_basename}.cms" -nocerts -noattr -nosmimecap
+    /usr/src/kernels/"${KERNEL_VERSION}"/scripts/sign-file -s "${module_basename}.cms" sha256 "${PUBLIC_KEY_CRT_PATH}" "${module_basename}"
+    /bin/bash ./sign-check.sh "${KERNEL_VERSION}" "${module_basename}" "${PUBLIC_KEY_CRT_PATH}"
+    gzip -9f "${module_basename}"
+  else
+    openssl cms -sign -signer "${SIGNING_KEY}" -binary -in "$module" -outform DER -out "${module}.cms" -nocerts -noattr -nosmimecap
+    /usr/src/kernels/"${KERNEL_VERSION}"/scripts/sign-file -s "${module}.cms" sha256 "${PUBLIC_KEY_CRT_PATH}" "${module}"
+    /bin/bash ./sign-check.sh "${KERNEL_VERSION}" "${module}" "${PUBLIC_KEY_CRT_PATH}"
+  fi
+done