V8.13.400.2025.11.08

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
2025-11-09 16:42:30 +01:00
parent ad2456eb66
commit ebf351fa43
8 changed files with 348 additions and 32 deletions
--- a/.pubkey/dropbear-key-2015.asc
+++ b/.pubkey/dropbear-key-2015.asc
@@ -0,0 +1,41 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
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+Xj3d7uSYCr1oLEEAnjJ+RpVfu3Gpye5Q+0X8EFiMLlXZ
+=kT6a
+-----END PGP PUBLIC KEY BLOCK-----
--- a/config/hooks/live/0020_dropbear_build.chroot
+++ b/config/hooks/live/0020_dropbear_build.chroot
@@ -0,0 +1,57 @@
+#!/bin/bash
+# SPDX-Version: 3.0
+# SPDX-CreationInfo: 2025-10-11; WEIDNER, Marc S.; <msw@coresecret.dev>
+# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.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.live.builder
+# SPDX-Security-Contact: security@coresecret.eu
+set -Ceuo pipefail
+
+printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 '%s' starting ... \e[0m\n" "${0}"
+
+### Declare Arrays, HashMaps, and Variables.
+declare var_dropbear_version="2025.88"
+declare var_build_dir="/root/build"
+declare var_logfile="${var_build_dir}/_build.log"
+tar xjf "/root/dropbear/dropbear-${var_dropbear_version}.tar.bz2" -C "/root/build"
+cp "/root/dropbear/localoptions.h" "${var_build_dir}"
+cd "${var_build_dir}"
+
+### Flag Purpose:
+#  -fPIE              : Generate position-independent executable code
+#  -pie               : Link the executable as PIE (so that ASLR works)
+#  -static            : Fully statically linked against musl
+#  -s                 : Strip unnecessary symbols directly during linking
+#  -Wl,-z,relro,-z,now: Enables full RELRO (symbol resolution at program startup)
+
+# shellcheck disable=SC2016,SC2312
+setsid bash -c '
+    ### Sterile environment for the build-process.
+    export -n SHELLOPTS
+    set +u
+    unset PATH_SEPARATOR
+    PATH_SEPARATOR=":"
+    PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+    CC=musl-gcc \
+      CFLAGS="-Os -fPIE -Wno-undef -fstack-protector-strong -D_FORTIFY_SOURCE=2" \
+      LDFLAGS="-static -pie -s -Wl,-z,relro,-z,now" \
+      ./configure \
+      --enable-static \
+      --enable-openpty \
+      --disable-pam \
+      --disable-zlib
+
+    # shellcheck disable=2312
+    make -j"$(nproc)"
+  ' >> "${var_logfile}" 2>&1
+
+  rm -rf /root/dropbear
+
+printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ '%s' applied successfully. \e[0m\n" "${0}"
+
+exit 0
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
--- a/config/includes.chroot/root/.ciss/alias
+++ b/config/includes.chroot/root/.ciss/alias
@@ -165,7 +165,7 @@ genstring() {
 #######################################
 scurl() {
  if [[ $# -ne 2 ]]; then
-    printf "%s❌ Error: Usage: scurl <URL> <path/to/file>. %s%s" "${CRED}" "${CRES}" "${NL}" >&2
+    printf "%b❌ Error: Usage: scurl <URL> <path/to/file>. %b%b" "${CRED}" "${CRES}" "${NL}" >&2
    return 1
  fi
  declare url="$1"
@@ -177,7 +177,7 @@ scurl() {
            -o "${output_path}" \
            "${url}"
  then
-    printf "%s❌ Error: Download failed for URL: '%s'. %s%s" "${CRED}" "${url}" "${CRES}" "${NL}" >&2
+    printf "%b❌ Error: Download failed for URL: '%s'. %b%b" "${CRED}" "${url}" "${CRES}" "${NL}" >&2
    return 2
  fi
  return 0
@@ -199,7 +199,7 @@ scurl() {
 #######################################
 swget() {
  if [[ $# -ne 2 ]]; then
-    printf "%s❌ Error: Usage: swget <URL> <path/to/file>. %s%s" "${CRED}" "${CRES}" "${NL}" >&2
+    printf "%b❌ Error: Usage: swget <URL> <path/to/file>. %b%b" "${CRED}" "${CRES}" "${NL}" >&2
    return 1
  fi
  declare url="$1"
@@ -212,7 +212,7 @@ swget() {
            -qO "${output_path}" \
            "${url}"
  then
-    printf "%s❌ Error: Download failed for URL: '%s'. %s%s" "${CRED}" "${url}" "${CRES}" "${NL}" >&2
+    printf "%b❌ Error: Download failed for URL: '%s'. %b%b" "${CRED}" "${url}" "${CRES}" "${NL}" >&2
    return 2
  fi
  return 0
@@ -270,7 +270,7 @@ trel() {
 #######################################
 whichpackage() {
  if ! command -v "$1" >/dev/null 2>&1; then
-    printf '%s❌ Error: Program '%s' not found. %s%s' "${CRED}" "$1" "${CRES}" "${NL}" >&2
+    printf '%b❌ Error: Program '%s' not found. %b%b' "${CRED}" "$1" "${CRES}" "${NL}" >&2
    exit 1
  fi
  # shellcheck disable=SC2230,SC2312
--- a/lib/lib_primordial.sh
+++ b/lib/lib_primordial.sh
@@ -29,46 +29,37 @@ guard_sourcing || return "${ERR_GUARD_SRCE}"
 init_primordial() {
  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 %s starting ... \e[0m\n" "${BASH_SOURCE[0]}"

+  declare     var_dropbear_version="2025.88"
+
+  install -d -m 0700 "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/build"
+  install -d -m 0700 "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/dropbear"
+  install    -m 0400 "${VAR_WORKDIR}/upgrades/dropbear/dropbear-${var_dropbear_version}.tar.bz2" \
+    "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/dropbear/dropbear-${var_dropbear_version}.tar.bz2"
+  install    -m 0400 "${VAR_WORKDIR}/upgrades/dropbear/localoptions.h" \
+    "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/dropbear/localoptions.h"
+
+
+
  ### Check for SOPS AGE key integration ---------------------------------------------------------------------------------------
-  if [[ ! "${VAR_AGE,,}" == "true" ]]; then
+  if [[ "${VAR_AGE,,}" == "true" ]]; then

-    if compgen -G "${VAR_TMP_SECRET}/${VAR_AGE_KEY}" > /dev/null; then
-
-      shred -fzu -n 5 -- "${VAR_TMP_SECRET}/${VAR_AGE_KEY}"
-
-    fi
-
-  else
-
-    install -d -m 0700 "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.config/sops/age"
+    install -d -m 0700                                 "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.config/sops/age"
    install -m 0400 "${VAR_TMP_SECRET}/${VAR_AGE_KEY}" "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.config/sops/age/keys.txt"
    shred -fzu -n 5 -- "${VAR_TMP_SECRET}/${VAR_AGE_KEY}" 2>/dev/null || rm -f "${VAR_TMP_SECRET}/${VAR_AGE_KEY}"

  fi

  ### Check for SSH CISS and PhysNet primordial-workflow(tm) integration -------------------------------------------------------
-  if [[ ! "${VAR_SSHFP,,}" == "true" ]]; then
+  if [[ "${VAR_SSHFP,,}" == "true" ]]; then

-    if compgen -G "${VAR_TMP_SECRET}/id*" > /dev/null; then
-
-      shred -fzu -n 5 -- "${VAR_TMP_SECRET}/id"*
-
-    fi
-
-    if compgen -G "${VAR_TMP_SECRET}/ssh_host_*" > /dev/null; then
-
-      shred -fzu -n 5 -- "${VAR_TMP_SECRET}/ssh_host_"*
-
-    fi
-
-  else
-
-    install -d -m 0700 "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.ssh"
+    install -d -m 0700                      "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.ssh"
    install -m 0600 "${VAR_TMP_SECRET}/id"* "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.ssh/"
+    normalize_ssh_keys_in_dir               "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/.ssh"
    shred -fzu -n 5 -- "${VAR_TMP_SECRET}/id"* 2>/dev/null || rm -f "${VAR_TMP_SECRET}/id"*

-    install -d -m 0700 "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/ssh"
+    install -d -m 0700                             "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/ssh"
    install -m 0600 "${VAR_TMP_SECRET}/ssh_host_"* "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/ssh/"
+    normalize_ssh_keys_in_dir                      "${VAR_HANDLER_BUILD_DIR}/config/includes.chroot/root/ssh/"
    shred -fzu -n 5 -- "${VAR_TMP_SECRET}/ssh_host_"* 2>/dev/null || rm -f "${VAR_TMP_SECRET}/ssh_host_"*

  fi
@@ -80,4 +71,77 @@ init_primordial() {
 ### Prevents accidental 'unset -f'.
 # shellcheck disable=SC2034
 readonly -f init_primordial
+
+#######################################
+# Normalize SSH key files: strip CRLF.
+# Globals:
+#   None
+# Arguments:
+#   1: ssh_host_key or id file
+# Returns:
+#   0: on success
+#   1: on failure
+#######################################
+normalize_ssh_key_file() {
+  declare var_key_file="" var_tmp_file=""
+  var_key_file="$1"
+
+  [[ -f "${var_key_file}" ]] || return 0
+
+  ### If there is any CR (carriage return), strip it.
+  if grep -q $'\r' "${var_key_file}"; then
+
+    ### Use a temporary file to avoid in-place corruption-
+    var_tmp_file="${var_key_file}.noCR.$$"
+
+    ### Remove only '\r', keep everything else as-is.
+    tr -d '\r' < "${var_key_file}" > "${var_tmp_file}" || {
+      echo "ERROR: Failed to normalize CRLF in ${var_key_file}" >&2
+      rm -f "${var_tmp_file}"
+      return 1
+    }
+
+    mv "${var_tmp_file}" "${var_key_file}" || {
+      echo "ERROR: Failed to replace normalized file ${var_key_file}" >&2
+      rm -f "${var_tmp_file}"
+      return 1
+    }
+  fi
+
+  return 0
+}
+### Prevents accidental 'unset -f'.
+# shellcheck disable=SC2034
+readonly -f normalize_ssh_key_file
+
+#######################################
+# Normalize SSH key files in dir.
+# Globals:
+#   None
+# Arguments:
+#   1: directory
+# Returns:
+#   0: on success
+#   1: on failure
+#######################################
+normalize_ssh_keys_in_dir() {
+  declare var_key_dir="" var_key_file=""
+  var_key_dir="$1"
+
+  [[ -d "${var_key_dir}" ]] || return 0
+
+  ### Cover both root identity keys and host keys.
+  for var_key_file in "${var_key_dir}"/id_* "${var_key_dir}"/ssh_host_*; do
+
+    [[ -e "${var_key_file}" ]] || continue
+
+    normalize_ssh_key_file "${var_key_file}" || return 1
+
+  done
+
+  return 0
+}
+### Prevents accidental 'unset -f'.
+# shellcheck disable=SC2034
+readonly -f normalize_ssh_keys_in_dir
 # vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
--- a/upgrades/dropbear/SHA512SUM.asc
+++ b/upgrades/dropbear/SHA512SUM.asc
@@ -0,0 +1,24 @@
+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA512
+
+eb16a13aa44732cab4db009bd55903e45f8756598683377bfe55185fbf0e3265  CHANGES
+738b7f358547f0c64c3e1a56bbc5ef98d34d9ec6adf9ccdf01dc0bf2caa2bc8d  dropbear-2025.87.tar.bz2
+af24198895f604c2e114abe29a2f0c3fe30831e6db26e0f93fd5f78e734b61be  dropbear-2025.87.tar.bz2.asc
+783f50ea27b17c16da89578fafdb6decfa44bb8f6590e5698a4e4d3672dc53d4  dropbear-2025.88.tar.bz2
+fe40fd8f40a7c5498025cc2058eaecbcd9e649a833d6cdecdab35f1156f4d411  dropbear-2025.88.tar.bz2.asc
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--- a/upgrades/dropbear/dropbear-2025.88.tar.bz2
+++ b/upgrades/dropbear/dropbear-2025.88.tar.bz2
--- a/upgrades/dropbear/dropbear-2025.88.tar.bz2.asc
+++ b/upgrades/dropbear/dropbear-2025.88.tar.bz2.asc
@@ -0,0 +1,16 @@
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--- a/upgrades/dropbear/localoptions.h
+++ b/upgrades/dropbear/localoptions.h
@@ -0,0 +1,114 @@
+/* # 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; ZIMNOL, Andre H.; <git.cs@physnet.eu> */
+/* # 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 */
+
+#ifndef DROPBEAR_LOCALOPTIONS_H_
+#define DROPBEAR_LOCALOPTIONS_H_
+
+/* Override default port */
+#define DROPBEAR_DEFPORT "42137"
+
+/* disable DH-group14 to remove 2048-bit moduli */
+#undef DROPBEAR_DH_GROUP14_SHA256
+#define DROPBEAR_DH_GROUP14_SHA256 0
+
+/* Disable small code optimization */
+#undef DROPBEAR_SMALL_CODE
+#define DROPBEAR_SMALL_CODE 0
+
+/* Cipher changes */
+#undef DROPBEAR_AES128
+#define DROPBEAR_AES128 0
+
+/* replace default MAC-Liste: nur encrypt-teh-MAC Varianten */
+#undef DROPBEAR_MAC_ALGS
+#define DROPBEAR_MAC_ALGS \
+    "hmac-sha2-256-etm@openssh.com", \
+    "hmac-sha2-512-etm@openssh.com"
+
+/* replace default KEX-Liste: nur Curve25519, DH-group16 und die PQ-Hybriden */
+#undef DROPBEAR_KEX_ALGS
+#define DROPBEAR_KEX_ALGS \
+    "curve25519-sha256", \
+    "diffie-hellman-group16-sha512", \
+    "sntrup761x25519-sha512", \
+    "mlkem768x25519-sha256"
+
+/* Message of the day disabled */
+#undef DO_MOTD
+#define DO_MOTD 0
+
+/* Disable password auth (server and client) */
+#undef DROPBEAR_SVR_PASSWORD_AUTH
+#define DROPBEAR_SVR_PASSWORD_AUTH 0
+#undef DROPBEAR_CLI_PASSWORD_AUTH
+#define DROPBEAR_CLI_PASSWORD_AUTH 0
+
+/* Adjust unauthenticated client and auth try limits */
+#undef MAX_UNAUTH_CLIENTS
+#define MAX_UNAUTH_CLIENTS 10
+#undef MAX_AUTH_TRIES
+#define MAX_AUTH_TRIES 6
+
+/* Disable built-in SFTP server */
+#undef DROPBEAR_SFTPSERVER
+#define DROPBEAR_SFTPSERVER 0
+
+/* Disable NIST ECDSA host keys */
+#undef DROPBEAR_ECDSA
+#define DROPBEAR_ECDSA 0
+
+/* Disable NIST ECDH key exchange */
+#undef DROPBEAR_ECDH
+#define DROPBEAR_ECDH 0
+
+/* Enforce AEAD ciphers only: disable CTR, enable GCM */
+#undef DROPBEAR_ENABLE_CTR_MODE
+#define DROPBEAR_ENABLE_CTR_MODE 0
+#undef DROPBEAR_ENABLE_GCM_MODE
+#define DROPBEAR_ENABLE_GCM_MODE 1
+
+/* Prevent fallback to encrypt-and-MAC algorithms */
+#undef DROPBEAR_USER_ALGO_LIST
+#define DROPBEAR_USER_ALGO_LIST 1
+
+/* Disable client proxy commands to prevent arbitrary command execution */
+#undef DROPBEAR_CLI_PROXYCMD
+#define DROPBEAR_CLI_PROXYCMD 0
+
+/* Disable netcat mode to avoid forwarding misuse */
+#undef DROPBEAR_CLI_NETCAT
+#define DROPBEAR_CLI_NETCAT 0
+
+/* Disable agent forwarding to avoid credential relay */
+#undef DROPBEAR_SVR_AGENTFWD
+#define DROPBEAR_SVR_AGENTFWD 0
+#undef DROPBEAR_CLI_AGENTFWD
+#define DROPBEAR_CLI_AGENTFWD 0
+
+/* Disable TCP forwarding if not required */
+#undef DROPBEAR_SVR_REMOTETCPFWD
+#define DROPBEAR_SVR_REMOTETCPFWD 0
+#undef DROPBEAR_SVR_LOCALSTREAMFWD
+#define DROPBEAR_SVR_LOCALSTREAMFWD 0
+#undef DROPBEAR_CLI_LOCALTCPFWD
+#define DROPBEAR_CLI_LOCALTCPFWD 0
+#undef DROPBEAR_CLI_REMOTETCPFWD
+#define DROPBEAR_CLI_REMOTETCPFWD 0
+
+/* Enforce sensible defaults for keepalives and idle timeouts */
+#undef DEFAULT_KEEPALIVE
+#define DEFAULT_KEEPALIVE 60
+#undef DEFAULT_IDLE_TIMEOUT
+#define DEFAULT_IDLE_TIMEOUT 300
+
+#endif /* DROPBEAR_LOCALOPTIONS_H_ */
+
+/* vim: set filetype=c ts=2 sw=2 sts=2 et ai tw=100 */