feat(ota): 实现安全OTA更新协议支持AES加密和CRC校验
- 添加AES128加密解密功能支持安全固件传输 - 实现基于随机数握手的安全会话密钥协商机制 - 集成CRC32带密钥校验确保数据完整性 - 重构OTA状态机支持握手、数据传输和验证流程 - 添加CANFD数据长度规范处理和安全跳转逻辑 - 移除调试打印语句优化性能 refactor(can): 优化CANFD发送和OTA确认处理逻辑 - 重构CANFD_AsyncSend函数支持规范数据长度 - 重命名sendACK为sendDATA_ACK并添加重载函数 - 修复数据长度处理和缓冲区填充逻辑 - 优化CAN消息发送的数据复制和验证流程 - 移除未使用的联合体类型定义 chore(project): 添加AES加密模块和系统初始化配置 - 在项目配置中添加AES128加密解密文件 - 在main.cpp中初始化CRC外设模块 - 添加安全十六进制打印调试函数 - 集成AES加密库到OTA处理流程中 - 优化系统时钟初始化配置
This commit is contained in:
+340
-79
@@ -1,4 +1,8 @@
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#include "OTA.h"
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#include "Can.h"
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#include "aes128.h"
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#include "config.h"
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#include "gd32c10x.h" // 主头文件，包含了gd32c10x_crc.h的内容
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#include "gd32c10x_fmc.h"
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#include "systick.h"
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#include <cstdio>
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@@ -12,17 +16,20 @@ OTAHandler ota;
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extern "C" {
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void canfd_rx_irq_handler(void);
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}
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#define DEBUG_OTA 1
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static inline uint32_t extract_u32_from_4bytes(const uint8_t *array) {
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return ((uint32_t)array[3] << 24) | ((uint32_t)array[2] << 16) |
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((uint32_t)array[1] << 8) | (uint32_t)array[0];
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}
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void OTAHandler::init() {}
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void OTAHandler::process() {
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if (!ota_active) {
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if (ota_state == OTA_STATE_IDLE) {
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ota_time = 0; // 重置计时器
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static u8 zero[1] = {ota_active};
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static u8 zero[1] = {0};
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_WAIT_ID, 0, zero);
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#ifdef DEBUG_OTA
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printf("wait OTA%d\r\n", ota_active);
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#if DEBUG_OTA
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printf("OTA status:%d\r\n", ota_state);
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#endif
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delay_1ms(10);
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return;
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@@ -32,9 +39,11 @@ void OTAHandler::process() {
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}
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// 检查是否超时（例如：10秒无数据则退出OTA模式）
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if (ota_time > 10000) { // 10秒超时（10000 x 1ms）
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if (ota_time > OTA_TIMEOUT) { // 10秒超时（10000 x 1ms）
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ota_time = 0;
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ota_active = false;
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ota_state = OTA_STATE_IDLE;
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ota_error = OTA_ERROR_TIMEOUT;
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send_error_frame(OTA_ERROR_TIMEOUT); // 验证失败
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}
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}
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@@ -50,39 +59,40 @@ bool OTAHandler::validateApplication() {
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}
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void OTAHandler::jumpToApplication() {
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if (!validateApplication()) return;
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// 1. 关闭所有中断
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__disable_irq();
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for (int i = 0; i < 8; i++) {
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NVIC->ICER[i] = 0xFFFFFFFF;
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}
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// 2. 重置外设（特别是CAN，防止冲突）
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can_deinit(CAN0);
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// 3. 重置系统时钟到默认状态
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rcu_system_clock_source_config(RCU_CKSYSSRC_IRC8M);
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// 4. 关闭一些关键外设时钟
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rcu_periph_clock_disable(RCU_GPIOA);
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rcu_periph_clock_disable(RCU_GPIOB);
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rcu_periph_clock_disable(RCU_GPIOC);
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rcu_periph_clock_disable(RCU_USART0);
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rcu_periph_clock_disable(RCU_CAN0);
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rcu_periph_clock_disable(RCU_TIMER0);
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rcu_periph_clock_disable(RCU_DMA0);
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// 5. 设置MSP并跳转
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uint32_t msp_value = *(__IO uint32_t*)APP_START_ADDR;
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__set_MSP(msp_value);
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uint32_t reset_handler = *(__IO uint32_t*)(APP_START_ADDR + 4);
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typedef void (*AppEntryFunc)(void);
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AppEntryFunc app_entry = (AppEntryFunc)reset_handler;
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// 6. 跳转
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app_entry();
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if (!validateApplication())
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return;
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// 1. 关闭所有中断
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__disable_irq();
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for (int i = 0; i < 8; i++) {
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NVIC->ICER[i] = 0xFFFFFFFF;
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}
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// 2. 重置外设（特别是CAN，防止冲突）
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can_deinit(CAN0);
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// 3. 重置系统时钟到默认状态
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rcu_system_clock_source_config(RCU_CKSYSSRC_IRC8M);
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// 4. 关闭一些关键外设时钟
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rcu_periph_clock_disable(RCU_GPIOA);
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rcu_periph_clock_disable(RCU_GPIOB);
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rcu_periph_clock_disable(RCU_GPIOC);
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rcu_periph_clock_disable(RCU_USART0);
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rcu_periph_clock_disable(RCU_CAN0);
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rcu_periph_clock_disable(RCU_TIMER0);
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rcu_periph_clock_disable(RCU_DMA0);
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// 5. 设置MSP并跳转
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uint32_t msp_value = *(__IO uint32_t *)APP_START_ADDR;
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__set_MSP(msp_value);
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uint32_t reset_handler = *(__IO uint32_t *)(APP_START_ADDR + 4);
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typedef void (*AppEntryFunc)(void);
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AppEntryFunc app_entry = (AppEntryFunc)reset_handler;
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// 6. 跳转
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app_entry();
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}
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void OTAHandler::eraseApplicationArea() {
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@@ -105,52 +115,303 @@ void OTAHandler::writeApplicationData(u32 offset, u8 *data, u32 size) {
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memcpy(&word, &data[i], 4);
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fmc_word_program(write_addr + i, word);
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}
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fmc_lock();
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}
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void OTAHandler::handleOTAMessage(u32 id, u8 *data, u8 len) {
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if (id == CANFD_OTA_REQ_ID) {
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#ifdef DEBUG_OTA
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printf("req OTA\r\n");
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if (id == CANFD_OTA_DATA_ID) {
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ota_time = 0;
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if (len == 64 and ota_state == OTA_STATE_RECEIVING_FIRMWARE) {
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#if DEBUG_OTA
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printf("stage8:OTA_RECEIVING_FIRMWARE\r\n");
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#endif
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// OTA请求包
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u32 new_size = *(u32 *)data;
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if (new_size <= APP_MAX_SIZE) {
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expected_size = new_size;
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received_size = 0;
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// eraseApplicationArea();
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ota_active = true;
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sendACK(new_size); // 确认开始
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#ifdef DEBUG_OTA
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printf("start OTA%d\r\n", ota_active);
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#endif
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}
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} else if (id == CANFD_OTA_DATA_ID && ota_active) {
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// 数据包格式：[4字节包序号][实际数据]
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if (len >= 4) {
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u32 packet_num = *(u32 *)data;
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u32 offset = packet_num * (len - 4);
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if (offset < expected_size) {
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writeApplicationData(offset, &data[4], len - 4); // 写入数据
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received_size += (len - 4);
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sendACK(packet_num); // 确认ACK
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ota_time = 0; // 重置计时器
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// 检查是否完成
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if (received_size >= expected_size) {
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ota_active = false;
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// 跳转前延时让ACK发出
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for (volatile int i = 0; i < 100000; i++)
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;
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jumpToApplication();
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}
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// 数据解包
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u32 receive_session_num;
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u32 receive_packet_num;
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u8 receive_encrypted_data[OTA_PACKET_SIZE];
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u32 receive_IFEND;
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u8 receive_dataCRC32[4];
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receive_session_num = extract_u32_from_4bytes(data);
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receive_packet_num = extract_u32_from_4bytes(data + 4);
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for (int i = 0; i < 48; i++) {
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receive_encrypted_data[i] = data[i + 8];
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}
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receive_IFEND = extract_u32_from_4bytes(data + 56);
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for (int i = 0; i < 4; i++) {
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receive_dataCRC32[i] = data[i + 60];
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}
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// 解密
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u8 decrypted_data[OTA_PACKET_SIZE];
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u8 calculated_dataCRC32[4];
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aes128_set_key(&aes_ctx, current_K_session);
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aes128_ecb_decrypt_48bytes(&aes_ctx, receive_encrypted_data,
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decrypted_data);
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// 计算解密后CRC数据
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calculate_crc32_with_key(current_K_session, decrypted_data,
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calculated_dataCRC32);
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// CRC数据匹配
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if (memcmp(receive_dataCRC32, calculated_dataCRC32, SIZE_U32) !=
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0) {
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ota_error = OTA_ERROR_INVALID_CRC;
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send_error_frame(OTA_ERROR_INVALID_CRC);
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return;
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}
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if (receive_IFEND == 0xFFFFFFFF) { // 接收到尾帧，发送结束信号
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u8 pack_number[4] = {0xFF, 0xFF, 0xFF, 0xFF};
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CAN0_transmiter.sendDATA_ACK(CANFD_OTA_ACK_ID, pack_number);
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ota_state = OTA_STATE_FINISHED;
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return;
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}
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// 下一个请求
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u32 request_packet = receive_packet_num + 1;
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u8 pack_number[4];
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// 封包
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memcpy(&pack_number, &request_packet, 4);
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CAN0_transmiter.sendDATA_ACK(CANFD_OTA_ACK_ID, pack_number);
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} else if (len == 4 and ota_state == OTA_STATE_CHECKING_FIRMWARE) {
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#if DEBUG_OTA
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printf("stage7:OTA_STATE_CHECKING_FIRMWARE\r\n");
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#endif
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// OTA请求包
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u32 new_size = *(u32 *)data;
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if (new_size <= APP_MAX_SIZE) {
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expected_size = new_size;
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received_size = 0;
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} else {
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ota_error = OTA_ERROR_INVALID_SIZE;
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send_error_frame(OTA_ERROR_INVALID_SIZE);
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return;
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}
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// eraseApplicationArea();
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u8 send_data[6] = {0xBA, 0xC0, 0x00,
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0x00, 0x00, 0x00}; // 确认开始传输
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// 发送接收包0请求
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_ACK_ID, 6, send_data);
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ota_state = OTA_STATE_RECEIVING_FIRMWARE;
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} else if (len == 2 and ota_state == OTA_STATE_FINISHED) {
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#if DEBUG_OTA
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printf("stage8:OTA_STATE_FINISHED\r\n");
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#endif
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u8 send_data[2] = {0x0A, 0xAC}; // 确认开始传输
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// 4. 验证成功 - 发送最终ACK
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_ACK_ID, 2, send_data);
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} else {
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ota_error = OTA_ERROR_INVALID_PACKET;
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send_error_frame(OTA_ERROR_INVALID_PACKET);
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}
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} else if (id == CANFD_OTA_REQ_ID) {
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ota_time = 0;
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#if DEBUG_OTA
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printf("stage2:OTA_STATE_WAITING_RANDOM\r\n");
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#endif
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if (data[0] == 0x00 and data[1] == 0xAC and len == 2 and
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ota_state == OTA_STATE_IDLE) { // 收到发起信号
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u8 send_data[2] = {0x00, 0xac}; // 确认握手开始，请求随机数
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_ACK_ID, 2,
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send_data); // 发送握手开始信号
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ota_state = OTA_STATE_WAITING_RANDOM;
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} else if (len == 16 and ota_state == OTA_STATE_WAITING_RANDOM) {
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#if DEBUG_OTA
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printf("stage4:OTA_STATE_WAITING_CONFIRM\r\n");
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#endif
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while (len-- > 0) {
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nonce_server[len] = data[len];
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}
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// 1. 获取设备唯一码
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getDeviceSerialNumber(device_uid);
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// 2. 初始化AES上下文（设置主密钥）
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aes128_set_key(&aes_ctx, K_master);
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// 3. 生成会话密钥 K_session (16字节)
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u8 K_session[16];
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aes128_encrypt_block(&aes_ctx, nonce_server,
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K_session); // 用主密钥加密随机数
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// 4. 用主密钥加密明文 (AES-128-ECB)
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u8 encrypted_Ksession[16];
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u8 temp_block[AES_BLOCK_SIZE];
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// 加密第一个16字节块
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aes128_encrypt_block(&aes_ctx, K_session, temp_block);
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memcpy(encrypted_Ksession, temp_block, 16);
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// 5. 构造握手响应包 (36字节)
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u8 handshake_response[36];
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// 5.1 前12字节：设备UID
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memcpy(handshake_response, device_uid, 12);
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// 5.2 接下来8字节：nonce后半部分
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memcpy(handshake_response + 12, nonce_server + 8, 8);
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// 5.3 最后16字节：加密数据的K-session
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memcpy(handshake_response + 20, encrypted_Ksession, 16);
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// 6. 通过CAN发送响应
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_ACK_ID, 36,
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handshake_response);
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// 7. 保存会话密钥供后续使用
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memcpy(current_K_session, K_session, 16);
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// 8. 更新状态机
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ota_state = OTA_STATE_WAITING_CONFIRM;
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} else if (len == 16 and ota_state == OTA_STATE_WAITING_CONFIRM) {
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#if DEBUG_OTA
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printf("stage6:OTA_STATE_CHECKING_SESSION\r\n");
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#endif
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u8 plaintext[16];
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u8 expected[16];
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// 1. 用K_session解密
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u8 encrypted_confirm[16];
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memcpy(encrypted_confirm, data, 16);
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aes128_set_key(&aes_ctx, current_K_session);
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aes128_decrypt_block(&aes_ctx, encrypted_confirm, plaintext);
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// 2. 计算期望值 (nonce_server XOR 0x55)
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// 注意：需要保存原始的nonce_server
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for (int i = 0; i < 16; i++) {
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expected[i] = nonce_server[i] ^ 0x55;
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}
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// 3. 验证解密结果
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if (memcmp(plaintext, expected, 16) != 0) {
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// 验证失败 - 可能密钥错误或攻击
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ota_error = OTA_ERROR_INVALID_KEY;
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send_error_frame(OTA_ERROR_INVALID_KEY); // 验证失败
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// reset_ota_state();
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return;
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}
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u8 send_data[2] = {0xBA, 0xC0}; // 确认开始传输
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// 4. 验证成功 - 发送最终ACK
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_ACK_ID, 2, send_data);
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// 5. 更新状态 - 进入固件接收阶段
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ota_state = OTA_STATE_CHECKING_FIRMWARE;
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} else {
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// 其他握手异常
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ota_error = OTA_ERROR_INVALID_HANDSHAKE;
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send_error_frame(OTA_ERROR_INVALID_HANDSHAKE);
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return;
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}
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}
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}
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void OTAHandler::sendACK(u32 packet_num) {
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CAN0_transmiter.sendACK(CANFD_OTA_ACK_ID, packet_num);
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}
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void send_error_frame(u8 error) {
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u8 error_frame[1] = {error};
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CAN0_transmiter.CANFD_AsyncSend(CANFD_OTA_ACK_ID, 1, error_frame);
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}
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/**
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* @brief 获取GD32设备唯一码
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* @param buffer 存储唯一码的缓冲区，至少需要12字节
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* @return void
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*/
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void getDeviceSerialNumber(u8 *buffer) {
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uint32_t serial_msb = DEVICE_SERIAL_ADDR_MSB;
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uint32_t serial_mid = DEVICE_SERIAL_ADDR_MID;
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uint32_t serial_lsb = DEVICE_SERIAL_ADDR_LSB;
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// 将96位唯一ID复制到缓冲区 (以小端序存储)
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for (int i = 0; i < 4; i++) {
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buffer[i] = (u8)(serial_lsb >> (i * 8));
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buffer[i + 4] = (u8)(serial_mid >> (i * 8));
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buffer[i + 8] = (u8)(serial_msb >> (i * 8));
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}
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}
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/**
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* @brief 获取GD32设备唯一码为字符串格式
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* @param str 存储唯一码字符串的缓冲区，至少需要25字节（包含结束符）
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* @return void
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*/
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void getDeviceSerialNumberString(char *str) {
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u8 serial[12];
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getDeviceSerialNumber(serial);
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// 将字节序列转换为十六进制字符串表示
|
||||
for (int i = 0; i < 12; i++) {
|
||||
sprintf(&str[i * 2], "%02X", serial[i]);
|
||||
}
|
||||
str[24] = '\0'; // 确保字符串结束
|
||||
}
|
||||
|
||||
/**
|
||||
* 带密钥的CRC32校验函数
|
||||
*
|
||||
* @param key 16字节密钥
|
||||
* @param data 48字节待校验数据
|
||||
* @param output 4字节输出缓冲区，存储CRC32校验值
|
||||
*
|
||||
* 特点：
|
||||
* - 使用标准CRC32算法
|
||||
* - 16字节密钥用于初始化CRC32状态
|
||||
*/
|
||||
void calculate_crc32_with_key(const uint8_t *key, const uint8_t *data,
|
||||
u8 *output) {
|
||||
// CRC32查找表（标准多项式0xEDB88320）
|
||||
static const uint32_t crc_table[256] = {
|
||||
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
|
||||
0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
|
||||
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
|
||||
0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
|
||||
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
|
||||
0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
|
||||
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
|
||||
0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
|
||||
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
|
||||
0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
|
||||
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
|
||||
0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
|
||||
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
|
||||
0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
|
||||
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
|
||||
0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
|
||||
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
|
||||
0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
|
||||
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
|
||||
0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
|
||||
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
|
||||
0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
|
||||
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
|
||||
0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
|
||||
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
|
||||
0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
|
||||
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
|
||||
0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
|
||||
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
|
||||
0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
|
||||
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
|
||||
0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
|
||||
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
|
||||
0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
|
||||
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
|
||||
0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
|
||||
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
|
||||
0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
|
||||
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
|
||||
0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
|
||||
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
|
||||
0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
|
||||
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D};
|
||||
|
||||
// 用16字节密钥初始化CRC32状态
|
||||
uint32_t crc = 0xFFFFFFFF;
|
||||
for (int i = 0; i < 16; i++) {
|
||||
crc = crc_table[(crc ^ key[i]) & 0xFF] ^ (crc >> 8);
|
||||
}
|
||||
|
||||
// 计算48字节数据的CRC32
|
||||
for (int i = 0; i < 48; i++) {
|
||||
crc = crc_table[(crc ^ data[i]) & 0xFF] ^ (crc >> 8);
|
||||
}
|
||||
|
||||
// 取反得到最终结果
|
||||
crc = ~crc;
|
||||
|
||||
// 将CRC32结果拆分为4字节（小端格式）
|
||||
output[0] = (uint8_t)(crc >> 0);
|
||||
output[1] = (uint8_t)(crc >> 8);
|
||||
output[2] = (uint8_t)(crc >> 16);
|
||||
output[3] = (uint8_t)(crc >> 24);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user