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https://github.com/e-m-b-a/emba.git
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77 lines
2.5 KiB
Bash
Executable File
77 lines
2.5 KiB
Bash
Executable File
#!/bin/bash -p
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# EMBA - EMBEDDED LINUX ANALYZER
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#
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# Copyright 2020-2026 Siemens Energy AG
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#
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# EMBA comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
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# welcome to redistribute it under the terms of the GNU General Public License.
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# See LICENSE file for usage of this software.
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#
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# EMBA is licensed under GPLv3
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# SPDX-License-Identifier: GPL-3.0-only
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#
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# Author(s): Michael Messner
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#
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# Description: This module is for the firmware diffing mode. To use the diffing mode
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# a second firmware to compare with the first one needs to be configured
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# via the -o EMBA parameter.
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# This module is doing some basic checks on the firmware. It uses mainly
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# the functionality from the p02 module but on both firmware images.
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export PRE_THREAD_ENA=0
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D02_firmware_diffing_bin_details() {
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module_log_init "${FUNCNAME[0]}"
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module_title "Firmware differ - binary details"
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pre_module_reporter "${FUNCNAME[0]}"
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local lNEG_LOG=0
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if ! [[ -f "${FIRMWARE_PATH}" ]]; then
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print_output "[-] No 1st file for diffing provided"
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return
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fi
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if ! [[ -f "${FIRMWARE_PATH1}" ]]; then
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print_output "[-] No 2nd file for diffing provided"
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return
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fi
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local lMD5_FW_BIN1=""
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local lMD5_FW_BIN2=""
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# shellcheck disable=SC2153
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lMD5_FW_BIN1=$(md5sum "${FIRMWARE_PATH}")
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# shellcheck disable=SC2153
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lMD5_FW_BIN2=$(md5sum "${FIRMWARE_PATH1}")
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if [[ "${lMD5_FW_BIN1}" == "${lMD5_FW_BIN2}" ]]; then
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print_output "[-] Same firmware binary files - no further analysis"
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module_end_log "${FUNCNAME[0]}" 0
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return
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fi
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lNEG_LOG=1
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sub_module_title "Firmware binary details - firmware image 1"
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get_fw_file_details "${FIRMWARE_PATH}"
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generate_entropy_graph "${FIRMWARE_PATH}"
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print_fw_file_details "${FIRMWARE_PATH}"
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# generate_pixde "${FIRMWARE_PATH}"
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fw_bin_detector "${FIRMWARE_PATH}"
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if [[ -f "${LOG_DIR}"/firmware_entropy.png ]]; then
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mv "${LOG_DIR}"/firmware_entropy.png "${LOG_PATH_MODULE}"/firmware1_entropy.png
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write_link "${LOG_PATH_MODULE}"/firmware1_entropy.png
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fi
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sub_module_title "Firmware binary details - firmware image 2"
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get_fw_file_details "${FIRMWARE_PATH1}"
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generate_entropy_graph "${FIRMWARE_PATH1}"
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print_fw_file_details "${FIRMWARE_PATH1}"
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# generate_pixde "${FIRMWARE_PATH1}"
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fw_bin_detector "${FIRMWARE_PATH1}"
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if [[ -f "${LOG_DIR}"/firmware_entropy.png ]]; then
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mv "${LOG_DIR}"/firmware_entropy.png "${LOG_PATH_MODULE}"/firmware2_entropy.png
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write_link "${LOG_PATH_MODULE}"/firmware2_entropy.png
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fi
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module_end_log "${FUNCNAME[0]}" "${lNEG_LOG}"
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}
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