V8.00.000.2025.06.17

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

func/cdi_1000_helper/1085_helper_secure_dl.sh

@@ -0,0 +1,76 @@
+#!/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
+
+#######################################
+# Wrapper for secure curl.
+# Globals:
+#   ERR_DOWNLOAD_FAILED
+#   ERR_NO_DOWNLOAD_ARG
+# Arguments:
+#   1: URL from which to download a specific file.
+#   2: /path/to/file to be saved to.
+# Returns:
+#   ERR_DOWNLOAD_FAILED: Download failed.
+#   ERR_NO_DOWNLOAD_ARG: No arguments specified.
+#######################################
+scurl() {
+  if [[ $# -ne 2 ]]; then
+    do_log "error" "true" "Usage: scurl <URL> <path/to/file>"
+    return "${ERR_NO_DOWNLOAD_ARG}"
+  fi
+  declare url="$1"
+  declare output_path="$2"
+  if ! curl --doh-url "https://dns01.eddns.eu/dns-query" \
+            --doh-cert-status \
+            --tlsv1.3 \
+            -sSf \
+            -o "${output_path}" \
+            "${url}"
+  then
+    do_log "error" "true" "Download failed for URL: '${1}'."
+    return "${ERR_DOWNLOAD_FAILED}"
+  fi
+}
+
+#######################################
+# Wrapper for secure wget.
+# Globals:
+#   ERR_DOWNLOAD_FAILED
+#   ERR_NO_DOWNLOAD_ARG
+# Arguments:
+#   1: URL from which to download a specific file.
+#   2: /path/to/file to be saved to.
+# Returns:
+#   ERR_DOWNLOAD_FAILED: Download failed.
+#   ERR_NO_DOWNLOAD_ARG: No arguments specified.
+#######################################
+swget() {
+  if [[ $# -ne 2 ]]; then
+    do_log "error" "true" "Usage: swget <URL> <path/to/file>"
+    return "${ERR_NO_DOWNLOAD_ARG}"
+  fi
+  declare url="$1"
+  declare output_path="$2"
+  if ! wget --show-progress \
+            --no-clobber \
+            --https-only \
+            --secure-protocol=TLSv1_3 \
+            -qO "${output_path}" \
+            "${url}"
+  then
+    do_log "error" "true" "Download failed for URL: '${1}'."
+    return "${ERR_DOWNLOAD_FAILED}"
+  fi
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh