forked from espressif/esp-idf
feat(examples): Extend the bootloader_nvs example to support encrypted NVS reads
This commit is contained in:
harshal.patil
@@ -16,6 +16,15 @@ examples/storage/emmc:
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- if: IDF_TARGET == "esp32s3"
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reason: only support on esp32s3
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examples/storage/nvs_bootloader:
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depends_components:
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- nvs_flash
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- nvs_sec_provider
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disable:
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- if: CONFIG_NAME == "nvs_enc_flash_enc" and (SOC_AES_SUPPORTED != 1 and ESP_ROM_HAS_MBEDTLS_CRYPTO_LIB != 1)
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- if: CONFIG_NAME == "nvs_enc_hmac" and (SOC_HMAC_SUPPORTED != 1 or (SOC_HMAC_SUPPORTED == 1 and (SOC_AES_SUPPORTED != 1 and ESP_ROM_HAS_MBEDTLS_CRYPTO_LIB != 1)))
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reason: As of now in such cases, we do not have any way to perform AES operations in the bootloader build
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examples/storage/nvs_rw_blob:
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depends_components:
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- nvs_flash
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@@ -3,7 +3,9 @@
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# NVS Bootloader
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The purpose of this example is to show how to use the simplified, read-only API of NVS flash that can be used as a part of bootloader
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The purpose of this example is to show how to use the simplified, read-only API of NVS flash that can be used as a part of bootloader.
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A very practical application of being able to access the NVS in the bootloader build would be faster device restoration, where-in the application stores the device's current state/configurations and post a reset it would read the NVS to restore the device's last state, without waiting for application to boot-up.
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## Usage of this example:
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@@ -123,3 +125,116 @@ Below is a short explanation of files in the project folder.
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The example creates request/response array `read_list[]`, populates it with identifiers of the data to be read.
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Function `nvs_bootloader_read()` tries to find respective data in the partition (here `"nvs"`) and if the data is found, it populates the request/response array with data. For nvs entries either not found or not matching are indicated in response array as well.
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Function `log_nvs_bootloader_read_list()`is used before and after reading from nvs to show request/response data to the console.
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# Encrypted NVS Bootloader
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This example is extended to support reading encrypted NVS partition when NVS encryption is enabled.
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## Usage of this example:
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Enable NVS encryption using your preferred scheme. Please find more details regarding the `flash encryption based NVS encryption scheme` and the `HMAC based NVS encryption scheme` in the [NVS encryption documentation](https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/storage/nvs_encryption.html).
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(Note: In case you select the `HMAC based NVS encryption scheme`, make sure that you burn the below mentioned [HMAC key](./main/nvs_enc_hmac_key.bin) in the efuses.)
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For generating the encrypted NVS partitions, we shall use [NVS partition generator](https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/storage/nvs_partition_gen.html#nvs-partition-generator-utility).
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We shall use the [nvs_partition_gen.py](../../../components/nvs_flash/nvs_partition_generator/nvs_partition_gen.py) script for the operations.
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Along with the above mentioned file structure, the project folder also contains pre-generated encrypted partitions and the partition corresponding to the selected NVS encryption scheme is flashed along with the build artefacts using the `main/CMakeLists.txt`.
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In case the data in `nvs_data.csv` is modified, these encrypted NVS partitions can be re-generated using the following commands:
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1. NVS Encryption using the flash encryption scheme
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```
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python nvs_partition_gen.py encrypt $IDF_PATH/examples/storage/nvs_bootloader/nvs_data.csv $IDF_PATH/examples/storage/nvs_bootloader/main/nvs_encrypted.bin 0x6000 --inputkey $IDF_PATH/examples/storage/nvs_bootloader/main/encryption_keys.bin
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```
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2. NVS Encryption using the HMAC scheme
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```
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python nvs_partition_gen.py encrypt $IDF_PATH/examples/storage/nvs_bootloader/nvs_data.csv $IDF_PATH/examples/storage/nvs_bootloader/main/nvs_encrypted_hmac.bin 0x6000 --keygen --key_protect_hmac --kp_hmac_inputkey $IDF_PATH/examples/storage/nvs_bootloader/main/nvs_enc_hmac_key.bin
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```
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Build the application using configurations corresponding to the NVS encryption scheme that you have selected:
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```
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idf.py set-target <target>
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# For NVS encryption using flash encryption scheme
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cat sdkconfig.ci.nvs_enc_flash_enc >> sdkconfig
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OR
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# For NVS encryption using the HMAC scheme
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cat sdkconfig.ci.nvs_enc_hmac >> sdkconfig
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idf.py build
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```
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Then flash it and open the monitor with the following command:
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```
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idf.py flash monitor
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```
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If everything went well, the console output should contain the same three blocks of log messages that are mentioned above.
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### Running the example using QEMU
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You could quickly try out this example using QEMU. Refer this [link](https://github.com/espressif/esp-toolchain-docs/blob/main/qemu/README.md#choose-your-target) to know which targets are currently supported in QEMU.
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#### Using the NVS encryption's flash encryption scheme
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1. Configure the application with the corresponding configurations
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```
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idf.py set-target <qemu-supported-targets>
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cat sdkconfig.ci.nvs_enc_flash_enc >> sdkconfig
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# Disable the below config as it was enabled as a CI related configuration, thus enabling flash encryption during boot-up in QEMU
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echo "CONFIG_SECURE_FLASH_REQUIRE_ALREADY_ENABLED=n" >> sdkconfig
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```
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2. Building the app
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```
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idf.py build
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```
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3. Running the app
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```
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idf.py qemu monitor
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```
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#### Using the NVS encryption's HMAC scheme
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1. Build the application using the corresponding configurations
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```
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idf.py set-target <qemu-supported-targets>
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cat sdkconfig.ci.nvs_enc_hmac >> sdkconfig
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# Disable the below config as it was enabled as a CI related configuration, thus enabling flash encryption during boot-up in QEMU
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echo "CONFIG_SECURE_FLASH_REQUIRE_ALREADY_ENABLED=n" >> sdkconfig
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```
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2. Building the app
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```
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idf.py build
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```
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3. Burn the related HMAC key in the efuses
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```
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idf.py qemu efuse-burn-key BLOCK_KEY0 main/nvs_enc_hmac_key.bin HMAC_UP
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```
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4. Running the app
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```
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idf.py qemu monitor
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```
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@@ -1,6 +1,6 @@
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idf_component_register( SRCS "src/nvs_bootloader_example.c" "src/nvs_bootloader_example_utils.c"
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idf_component_register(SRCS "src/nvs_bootloader_example.c" "src/nvs_bootloader_example_utils.c"
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INCLUDE_DIRS "include"
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REQUIRES "nvs_flash" )
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REQUIRES "nvs_flash" "nvs_sec_provider")
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# We need to force GCC to integrate this static library into the
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# bootloader link. Indeed, by default, as the hooks in the bootloader are weak,
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@@ -1,5 +1,5 @@
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/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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* SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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@@ -8,6 +8,8 @@
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#include "nvs_bootloader.h"
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#include "nvs_bootloader_example_utils.h"
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#include "nvs_sec_provider.h"
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static const char* TAG = "nvs_bootloader_example";
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// Function used to tell the linker to include this file
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@@ -21,14 +23,11 @@ void bootloader_before_init(void) {
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}
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void log_request_call_read_evaluate_output(const char* nvs_partition_label, nvs_bootloader_read_list_t read_list[], const size_t read_list_count) {
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// log the request structure before the read to see the requested keys and namespaces
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// with the ESP_ERR_NOT_FINISHED return code we are just telling the log function to show the request data and omit printing the result data
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// it is useful for debugging the request structure
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log_nvs_bootloader_read_list(ESP_ERR_NOT_FINISHED, read_list, read_list_count);
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void log_request_call_read_evaluate_output(const char* nvs_partition_label, nvs_bootloader_read_list_t read_list[], const size_t read_list_count, const nvs_sec_cfg_t* sec_cfg)
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{
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esp_err_t ret = ESP_FAIL;
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// call the read function
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esp_err_t ret = nvs_bootloader_read(nvs_partition_label, read_list_count, read_list);
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ret = nvs_bootloader_read(nvs_partition_label, read_list_count, read_list);
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// Error code ESP_OK means that the read function was successful and individual, per record results are stored in the read_list
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if (ret == ESP_OK) {
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@@ -62,10 +61,48 @@ void bootloader_after_init(void) {
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// we are going to read from the default nvs partition labelled 'nvs'
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const char* nvs_partition_label = "nvs";
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#define STR_BUFF_LEN 10+1 // 10 characters + null terminator
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char str_buff[STR_BUFF_LEN];
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#define STR_BUFF_LEN_10 10+1 // 10 characters + null terminator
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#define STR_BUFF_LEN_66 66+1 // 66 characters + null terminator
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char str_buff_10[STR_BUFF_LEN_10];
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char str_buff_66[STR_BUFF_LEN_66];
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nvs_sec_cfg_t* sec_cfg = NULL;
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#if CONFIG_NVS_ENCRYPTION
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nvs_sec_cfg_t cfg = {};
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nvs_sec_scheme_t *sec_scheme_handle = NULL;
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#if CONFIG_NVS_SEC_KEY_PROTECT_USING_HMAC
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nvs_sec_config_hmac_t sec_scheme_cfg = NVS_SEC_PROVIDER_CFG_HMAC_DEFAULT();
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if (nvs_sec_provider_register_hmac(&sec_scheme_cfg, &sec_scheme_handle) != ESP_OK) {
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ESP_EARLY_LOGE(TAG, "Registering the HMAC scheme failed");
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return;
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}
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#elif CONFIG_NVS_SEC_KEY_PROTECT_USING_FLASH_ENC
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nvs_sec_config_flash_enc_t sec_scheme_cfg = NVS_SEC_PROVIDER_CFG_FLASH_ENC_DEFAULT();
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if (sec_scheme_cfg.nvs_keys_part == NULL) {
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ESP_EARLY_LOGE(TAG, "partition with subtype \"nvs_keys\" not found");
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}
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if (nvs_sec_provider_register_flash_enc(&sec_scheme_cfg, &sec_scheme_handle) != ESP_OK) {
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ESP_EARLY_LOGE(TAG, "Registering the Flash Encryption scheme failed");
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return;
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}
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#endif /* CONFIG_NVS_SEC_KEY_PROTECT_USING_HMAC */
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if (nvs_bootloader_read_security_cfg(sec_scheme_handle, &cfg) != ESP_OK) {
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ESP_EARLY_LOGE(TAG, "Reading the NVS security configuration failed");
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return;
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}
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if (nvs_bootloader_secure_init(&cfg) != ESP_OK) {
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ESP_LOGE(TAG, "Secure initialization of NVS failed");
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return;
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}
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#endif /* CONFIG_NVS_ENCRYPTION*/
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// --- This is the request structure for the read function showing validation errors - function will return ESP_ERR_INVALID_ARG ---
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ESP_EARLY_LOGI(TAG, "Trying to read the NVS partition by passing invalid arguments");
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nvs_bootloader_read_list_t bad_read_list_indicate_problems[] = {
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{ .namespace_name = "sunny_day", .key_name = "u8", .value_type = NVS_TYPE_U8 }, // ESP_ERR_NVS_NOT_FOUND
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// this is correct request, not found is expected default result code
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@@ -75,19 +112,21 @@ void bootloader_after_init(void) {
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// too long key name
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{ .namespace_name = "clowny_day", .key_name = "blobeee", .value_type = NVS_TYPE_BLOB }, // ESP_ERR_INVALID_ARG
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// not supported data type
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff, .buff_len = 0 } },
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff_10, .buff_len = 0 } },
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// ESP_ERR_INVALID_SIZE
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// buffer size is 0
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = NULL, .buff_len = 10 } }
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{ .namespace_name = "sunny_day", .key_name = "string_66_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = NULL, .buff_len = 66 } }
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// ESP_ERR_INVALID_SIZE
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// buffer pointer is invalid
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};
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size_t bad_read_list_indicate_problems_count = sizeof(bad_read_list_indicate_problems) / sizeof(bad_read_list_indicate_problems[0]);
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log_request_call_read_evaluate_output(nvs_partition_label, bad_read_list_indicate_problems, bad_read_list_indicate_problems_count);
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log_request_call_read_evaluate_output(nvs_partition_label, bad_read_list_indicate_problems, bad_read_list_indicate_problems_count, sec_cfg);
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// --- This is the request structure for the read function showing runtime errors - function will return ESP_OK ---
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// but some records will have result_code set to ESP_ERR_NVS_NOT_FOUND, ESP_ERR_NVS_TYPE_MISMATCH, ESP_ERR_INVALID_SIZE
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ESP_EARLY_LOGI(TAG, "Trying to read the NVS partition by expecting incorrect data");
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nvs_bootloader_read_list_t good_read_list_bad_results[] = {
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{ .namespace_name = "sunny_day", .key_name = "u8", .value_type = NVS_TYPE_I8 }, // ESP_ERR_NVS_TYPE_MISMATCH
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// data in the partition is of different type (NVS_TYPE_U8)
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@@ -95,17 +134,20 @@ void bootloader_after_init(void) {
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// data in the partition won't be found, because there is a typo in the key name
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{ .namespace_name = "clowny_day", .key_name = "i8", .value_type = NVS_TYPE_I8 }, // ESP_ERR_NVS_NOT_FOUND
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// data in the partition won't be found, because there is typo in namespace name
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff, .buff_len = 2 } },
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff_10, .buff_len = 2 } },
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// ESP_ERR_INVALID_SIZE
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// buffer is too small
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{ .namespace_name = "sunny_day", .key_name = "u32", .value_type = NVS_TYPE_U32 }, // ESP_OK
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// this value will be read correctly
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{ .namespace_name = "sunny_day", .key_name = "u32", .value_type = NVS_TYPE_U32 } // ESP_ERR_NVS_NOT_FOUND
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{ .namespace_name = "sunny_day", .key_name = "u32", .value_type = NVS_TYPE_U32 }, // ESP_ERR_NVS_NOT_FOUND
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// this value won't be read as function doesn't support duplicate readings
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{ .namespace_name = "sunny_day", .key_name = "string_66_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff_66, .buff_len = 65 } }
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// ESP_ERR_INVALID_SIZE
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// buffer is just small
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};
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size_t good_read_list_bad_results_count = sizeof(good_read_list_bad_results) / sizeof(good_read_list_bad_results[0]);
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log_request_call_read_evaluate_output(nvs_partition_label, good_read_list_bad_results, good_read_list_bad_results_count);
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log_request_call_read_evaluate_output(nvs_partition_label, good_read_list_bad_results, good_read_list_bad_results_count, sec_cfg);
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// --- This is the request structure for the read function showing all records found---
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@@ -116,16 +158,23 @@ void bootloader_after_init(void) {
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// For NVS_TYPE_STR the value field is a structure with a pointer to the buffer and the buffer length is povided
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// In this case, the buffer is a stack allocated array of 10 characters plus space for the null terminator
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ESP_EARLY_LOGI(TAG, "Trying to read the NVS partition correctly");
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nvs_bootloader_read_list_t good_read_list[] = {
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{ .namespace_name = "sunny_day", .key_name = "u8", .value_type = NVS_TYPE_U8 },
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{ .namespace_name = "sunny_day", .key_name = "i32", .value_type = NVS_TYPE_I32 },
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{ .namespace_name = "cloudy_day", .key_name = "i8", .value_type = NVS_TYPE_I8 }, // mixed in different namespace
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{ .namespace_name = "sunny_day", .key_name = "u16", .value_type = NVS_TYPE_U16 },
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff, .buff_len = STR_BUFF_LEN } }
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{ .namespace_name = "sunny_day", .key_name = "string_10_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff_10, .buff_len = STR_BUFF_LEN_10 } },
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{ .namespace_name = "sunny_day", .key_name = "string_66_chars", .value_type = NVS_TYPE_STR, .value.str_val = { .buff_ptr = str_buff_66, .buff_len = STR_BUFF_LEN_66 } }
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};
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size_t good_read_list_count = sizeof(good_read_list) / sizeof(good_read_list[0]);
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log_request_call_read_evaluate_output(nvs_partition_label, good_read_list, good_read_list_count);
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log_request_call_read_evaluate_output(nvs_partition_label, good_read_list, good_read_list_count, sec_cfg);
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#if CONFIG_NVS_ENCRYPTION
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nvs_bootloader_secure_deinit();
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#endif /* CONFIG_NVS_ENCRYPTION */
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ESP_LOGI(TAG, "Finished bootloader part");
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}
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@@ -1,3 +1,13 @@
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idf_component_register(SRCS "bootloader_hooks_example_main.c"
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INCLUDE_DIRS ".")
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nvs_create_partition_image(nvs ../nvs_data.csv FLASH_IN_PROJECT)
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if(NOT CONFIG_NVS_ENCRYPTION)
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nvs_create_partition_image(nvs ../nvs_data.csv FLASH_IN_PROJECT)
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else()
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if(CONFIG_NVS_SEC_KEY_PROTECT_USING_FLASH_ENC)
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esptool_py_flash_to_partition(flash "nvs_key" ${PROJECT_DIR}/main/encryption_keys.bin)
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esptool_py_flash_to_partition(flash "nvs" ${PROJECT_DIR}/main/nvs_encrypted.bin)
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else() # NVS Encryption using HMAC (CONFIG_NVS_SEC_KEY_PROTECT_USING_HMAC)
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esptool_py_flash_to_partition(flash "nvs" ${PROJECT_DIR}/main/nvs_encrypted_hmac.bin)
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endif()
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endif()
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1
examples/storage/nvs_bootloader/main/encryption_keys.bin
Normal file
1
examples/storage/nvs_bootloader/main/encryption_keys.bin
Normal file
@@ -0,0 +1 @@
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|
||||
@@ -0,0 +1,2 @@
|
||||
|
||||
|
||||
BIN
examples/storage/nvs_bootloader/main/nvs_encrypted.bin
Normal file
BIN
examples/storage/nvs_bootloader/main/nvs_encrypted.bin
Normal file
Binary file not shown.
BIN
examples/storage/nvs_bootloader/main/nvs_encrypted_hmac.bin
Normal file
BIN
examples/storage/nvs_bootloader/main/nvs_encrypted_hmac.bin
Normal file
Binary file not shown.
@@ -10,6 +10,8 @@ i16,data,i16,-20000
|
||||
u32,data,u32,4294967295
|
||||
i32,data,i32,-2147483648
|
||||
string_10_chars,data,string,"Text_67890"
|
||||
# adding the below entry to read non-multiple lengths of XTS-AES block size
|
||||
string_66_chars,data,string,"Text_67890_Text_67890_Text_67890_0_Text_67890_Text_67890_Text_6789"
|
||||
# defines cloudy_day namespace to show it can be read at once with sunny_day one
|
||||
cloudy_day,namespace,,
|
||||
i8,data,i8,-13
|
||||
|
||||
|
Can't render this file because it has a wrong number of fields in line 4.
|
@@ -1,4 +1,4 @@
|
||||
# SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
|
||||
# SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
|
||||
# SPDX-License-Identifier: CC0-1.0
|
||||
import pytest
|
||||
from pytest_embedded import Dut
|
||||
@@ -9,5 +9,27 @@ from pytest_embedded import Dut
|
||||
def test_nvs_bootloader_example(dut: Dut) -> None:
|
||||
# Expect to read hooks messages and data from NVS partition
|
||||
dut.expect_exact('Before reading from NVS partition')
|
||||
dut.expect_exact('Result data. Return code: ESP_OK')
|
||||
dut.expect_exact('u8 U8 255')
|
||||
dut.expect_exact('i32 I32 -2147483648')
|
||||
dut.expect_exact('i8 I8 -13')
|
||||
dut.expect_exact('u16 U16 65535')
|
||||
dut.expect_exact('string_10_chars STR Text_67890')
|
||||
dut.expect_exact('string_66_chars STR Text_67890_Text_67890_Text_67890_0_Text_67890_Text_67890_Text_6789')
|
||||
dut.expect_exact('Finished bootloader part')
|
||||
dut.expect_exact('User application is loaded and running.')
|
||||
|
||||
|
||||
@pytest.mark.esp32c3
|
||||
@pytest.mark.nvs_encr_hmac
|
||||
@pytest.mark.parametrize('config', ['nvs_enc_hmac'], indirect=True)
|
||||
def test_nvs_bootloader_example_nvs_encr_hmac(dut: Dut) -> None:
|
||||
test_nvs_bootloader_example(dut)
|
||||
|
||||
|
||||
@pytest.mark.esp32
|
||||
@pytest.mark.esp32c3
|
||||
@pytest.mark.flash_encryption
|
||||
@pytest.mark.parametrize('config', ['nvs_enc_flash_enc'], indirect=True)
|
||||
def test_nvs_bootloader_example_flash_enc(dut: Dut) -> None:
|
||||
test_nvs_bootloader_example(dut)
|
||||
|
||||
@@ -0,0 +1,13 @@
|
||||
CONFIG_SECURE_FLASH_ENC_ENABLED=y
|
||||
CONFIG_SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT=y
|
||||
CONFIG_SECURE_BOOT_ALLOW_ROM_BASIC=y
|
||||
CONFIG_SECURE_BOOT_ALLOW_JTAG=y
|
||||
CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_ENC=y
|
||||
CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_DEC=y
|
||||
CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_CACHE=y
|
||||
CONFIG_SECURE_FLASH_REQUIRE_ALREADY_ENABLED=y
|
||||
|
||||
CONFIG_NVS_ENCRYPTION=y
|
||||
CONFIG_NVS_SEC_KEY_PROTECT_USING_FLASH_ENC=y
|
||||
|
||||
CONFIG_PARTITION_TABLE_SINGLE_APP_ENCRYPTED_NVS=y
|
||||
12
examples/storage/nvs_bootloader/sdkconfig.ci.nvs_enc_hmac
Normal file
12
examples/storage/nvs_bootloader/sdkconfig.ci.nvs_enc_hmac
Normal file
@@ -0,0 +1,12 @@
|
||||
CONFIG_SECURE_FLASH_ENC_ENABLED=y
|
||||
CONFIG_SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT=y
|
||||
CONFIG_SECURE_BOOT_ALLOW_ROM_BASIC=y
|
||||
CONFIG_SECURE_BOOT_ALLOW_JTAG=y
|
||||
CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_ENC=y
|
||||
CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_DEC=y
|
||||
CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_CACHE=y
|
||||
CONFIG_SECURE_FLASH_REQUIRE_ALREADY_ENABLED=y
|
||||
|
||||
CONFIG_NVS_ENCRYPTION=y
|
||||
CONFIG_NVS_SEC_KEY_PROTECT_USING_HMAC=y
|
||||
CONFIG_NVS_SEC_HMAC_EFUSE_KEY_ID=0
|
||||
@@ -1,4 +1,4 @@
|
||||
# The size of bootloader has been increased, so the partition table offset needs adjustment
|
||||
CONFIG_PARTITION_TABLE_OFFSET=0xA000
|
||||
CONFIG_PARTITION_TABLE_OFFSET=0xB000
|
||||
CONFIG_BOOTLOADER_LOG_LEVEL_WARN=y
|
||||
CONFIG_BOOTLOADER_LOG_LEVEL=2
|
||||
|
||||
@@ -0,0 +1,2 @@
|
||||
CONFIG_IDF_TARGET="esp32c2"
|
||||
CONFIG_MBEDTLS_USE_CRYPTO_ROM_IMPL_BOOTLOADER=y
|
||||
Reference in New Issue
Block a user