V8.00.000.2025.06.17

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

func/system/4190_build_dropbear.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
+# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
+# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-FileType: SOURCE
+# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
+# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
+# SPDX-PackageName: CISS.debian.installer
+# SPDX-Security-Contact: security@coresecret.eu
+
+guard_sourcing
+
+#######################################
+# Build Ultra Hardened dropbear-2025.88 from sources.
+# Globals:
+#   DIR_TMP
+#   ERR_PATH_NOT_VALID
+#   VAR_SETUP_PATH
+# Arguments:
+#   None
+# Returns:
+#   ERR_PATH_NOT_VALID
+#   0: on success
+#######################################
+build_dropbear() {
+  declare var_dropbear_version="2025.88"
+  declare var_tar="${VAR_SETUP_PATH}/upgrades/dropbear/dropbear-${var_dropbear_version}.tar.bz2"
+  declare var_build_dir="${DIR_TMP}/build/dropbear-${var_dropbear_version}"
+
+  mkdir -p "${DIR_TMP}/build"
+  cp "${var_tar}" "${DIR_TMP}/build"
+  tar xjf "${DIR_TMP}/build/dropbear-${var_dropbear_version}.tar.bz2" -C "${DIR_TMP}/build" || return "${ERR_PATH_NOT_VALID}"
+  cp "${VAR_SETUP_PATH}/upgrades/dropbear/localoptions.h" "${var_build_dir}"
+  cd "${var_build_dir}" || return "${ERR_PATH_NOT_VALID}"
+
+  # Flag Purpose
+  #  -fPIE:               Generate position-independent executable code
+  #  -pie:                Link the executable as PIE (so that ASLR works)
+  #  -static:             Fully statically linked against musl
+  #  -s:                  Strip unnecessary symbols directly during linking
+  #  -Wl,-z,relro,-z,now: Enables full RELRO (symbol resolution at program startup)
+
+  CC=musl-gcc \
+  CFLAGS="-Os -fPIE -Wno-undef -fstack-protector-strong -D_FORTIFY_SOURCE=2" \
+  LDFLAGS="-static -pie -s -Wl,-z,relro,-z,now" \
+  ./configure \
+    --enable-static \
+    --enable-openpty \
+    --disable-pam \
+    --disable-zlib
+
+  make -j"$(nproc)"
+
+  do_log "info" "true" "Ultra Hardened dropbear-2025.88 build successfully from sources."
+
+  return 0
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh