{"id":10021284,"date":"2026-02-28T18:43:41","date_gmt":"2026-02-28T10:43:41","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021284"},"modified":"2026-02-28T18:43:41","modified_gmt":"2026-02-28T10:43:41","slug":"%e5%8a%a0%e5%af%86%e7%ae%97%e6%b3%95%e5%92%8c%e5%af%86%e9%92%a5%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021284","title":{"rendered":"\u52a0\u5bc6\u7b97\u6cd5\u548c\u5bc6\u94a5\u7ba1\u7406"},"content":{"rendered":"

\u5927\u5bb6\u597d\uff0c\u6211\u662f\u826f\u8bb8\u3002<\/p>\n

\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u4e2d\uff0c\u6570\u636e\u5b89\u5168\u8d8a\u6765\u8d8a\u53d7\u5230\u91cd\u89c6\u3002<\/p>\n

\u65e0\u8bba\u662f\u667a\u80fd\u5bb6\u5c45\u8bbe\u5907\u3001\u6c7d\u8f66\u7535\u5b50\u7cfb\u7edf\uff0c\u8fd8\u662f\u5de5\u4e1a\u63a7\u5236\u8bbe\u5907\uff0c\u90fd\u9700\u8981\u4fdd\u62a4\u654f\u611f\u6570\u636e\u4e0d\u88ab\u7a83\u53d6\u6216\u7be1\u6539\u3002<\/p>\n

\u52a0\u5bc6\u7b97\u6cd5\u548c\u5bc6\u94a5\u7ba1\u7406\u662f\u4fdd\u969c\u6570\u636e\u5b89\u5168\u7684\u4e24\u5927\u6838\u5fc3\u6280\u672f\u3002<\/p>\n

\u4eca\u5929\u6211\u4eec\u5c31\u6765\u804a\u804a\u8fd9\u4e2a\u8bdd\u9898\uff0c\u770b\u770b\u5728\u5d4c\u5165\u5f0f\u5f00\u53d1\u4e2d\u5982\u4f55\u6b63\u786e\u4f7f\u7528\u52a0\u5bc6\u7b97\u6cd5\uff0c\u4ee5\u53ca\u5982\u4f55\u5b89\u5168\u5730\u7ba1\u7406\u5bc6\u94a5\u3002<\/p>\n

1. \u52a0\u5bc6\u7b97\u6cd5\u57fa\u7840<\/h2>\n

1.1 \u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5<\/h3>\n

\u5bf9\u79f0\u52a0\u5bc6\u662f\u6307\u52a0\u5bc6\u548c\u89e3\u5bc6\u4f7f\u7528\u76f8\u540c\u5bc6\u94a5\u7684\u7b97\u6cd5\u3002<\/p>\n

\u8fd9\u7c7b\u7b97\u6cd5\u7684\u4f18\u70b9\u662f\u901f\u5ea6\u5feb\u3001\u6548\u7387\u9ad8\uff0c\u975e\u5e38\u9002\u5408\u5d4c\u5165\u5f0f\u7cfb\u7edf\u8d44\u6e90\u53d7\u9650\u7684\u573a\u666f\u3002<\/p>\n

\u5e38\u89c1\u7684\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u5305\u62ec AES\u3001DES\u30013DES \u7b49\uff0c\u5176\u4e2d AES\uff08\u9ad8\u7ea7\u52a0\u5bc6\u6807\u51c6\uff09\u662f\u76ee\u524d\u6700\u5e7f\u6cdb\u4f7f\u7528\u7684\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u3002<\/p>\n

\u5728 STM32 \u7b49\u5d4c\u5165\u5f0f\u5e73\u53f0\u4e0a\uff0c\u6211\u4eec\u7ecf\u5e38\u4f7f\u7528 AES \u7b97\u6cd5\u6765\u52a0\u5bc6\u654f\u611f\u6570\u636e\u3002<\/p>\n

AES \u652f\u6301 128 \u4f4d\u3001192 \u4f4d\u548c 256 \u4f4d\u4e09\u79cd\u5bc6\u94a5\u957f\u5ea6\uff0c\u5bc6\u94a5\u8d8a\u957f\u5b89\u5168\u6027\u8d8a\u9ad8\uff0c\u4f46\u8ba1\u7b97\u5f00\u9500\u4e5f\u8d8a\u5927\u3002<\/p>\n

\u5bf9\u4e8e\u5927\u591a\u6570\u5d4c\u5165\u5f0f\u5e94\u7528\u6765\u8bf4\uff0cAES-128 \u5df2\u7ecf\u8db3\u591f\u5b89\u5168\uff0c\u800c\u4e14\u6027\u80fd\u8868\u73b0\u826f\u597d\u3002<\/p>\n

\u4e3e\u4e2a\u5b9e\u9645\u7684\u4f8b\u5b50\uff0c\u5047\u8bbe\u6211\u4eec\u8981\u5728 STM32 \u4e0a\u52a0\u5bc6\u4e00\u6bb5\u4f20\u611f\u5668\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528 HAL \u5e93\u63d0\u4f9b\u7684\u52a0\u5bc6\u529f\u80fd:<\/p>\n

#include "stm32f4xx_hal.h"\n\u200b\nCRYP_HandleTypeDef hcryp;\n\u200b\n\/\/ \u521d\u59cb\u5316AES\u52a0\u5bc6\u6a21\u5757\nvoid AES_Init(void)\n{\n    __HAL_RCC_CRYP_CLK_ENABLE();\n    \n    hcryp.Instance = CRYP;\n    hcryp.Init.DataType = CRYP_DATATYPE_8B;\n    hcryp.Init.KeySize = CRYP_KEYSIZE_128B;\n    hcryp.Init.Algorithm = CRYP_AES_ECB;\n    \n    if (HAL_CRYP_Init(&hcryp) != HAL_OK)\n    {\n        Error_Handler();\n    }\n}\n\u200b\n\/\/ AES\u52a0\u5bc6\u51fd\u6570\nHAL_StatusTypeDef AES_Encrypt(uint8_t *plaintext\uff0c uint8_t *key\uff0c \n                               uint8_t *ciphertext\uff0c uint16_t size)\n{\n    HAL_StatusTypeDef status;\n    \n    \/\/ \u8bbe\u7f6e\u5bc6\u94a5\n    hcryp.Init.pKey = (uint32_t *)key;\n    \n    if (HAL_CRYP_Init(&hcryp) != HAL_OK)\n    {\n        return HAL_ERROR;\n    }\n    \n    \/\/ \u6267\u884c\u52a0\u5bc6\n    status = HAL_CRYP_Encrypt(&hcryp\uff0c (uint32_t *)plaintext\uff0c \n                              size\uff0c (uint32_t *)ciphertext\uff0c 1000);\n    \n    return status;\n}\n\u200b\n\/\/ AES\u89e3\u5bc6\u51fd\u6570\nHAL_StatusTypeDef AES_Decrypt(uint8_t *ciphertext\uff0c uint8_t *key\uff0c \n                               uint8_t *plaintext\uff0c uint16_t size)\n{\n    HAL_StatusTypeDef status;\n    \n    hcryp.Init.pKey = (uint32_t *)key;\n    \n    if (HAL_CRYP_Init(&hcryp) != HAL_OK)\n    {\n        return HAL_ERROR;\n    }\n    \n    status = HAL_CRYP_Decrypt(&hcryp\uff0c (uint32_t *)ciphertext\uff0c \n                              size\uff0c (uint32_t *)plaintext\uff0c 1000);\n    \n    return status;\n}<\/code><\/pre>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5728 STM32 \u4e0a\u4f7f\u7528\u786c\u4ef6\u52a0\u5bc6\u6a21\u5757\u8fdb\u884c AES \u52a0\u5bc6\u548c\u89e3\u5bc6\u3002<\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e0d\u662f\u6240\u6709 STM32 \u578b\u53f7\u90fd\u5e26\u6709\u786c\u4ef6\u52a0\u5bc6\u6a21\u5757\uff0c\u5982\u679c\u4f60\u7684\u82af\u7247\u4e0d\u652f\u6301\uff0c\u53ef\u4ee5\u4f7f\u7528\u8f6f\u4ef6\u5b9e\u73b0\u7684 AES \u5e93\uff0c\u6bd4\u5982 mbedTLS \u6216\u8005 TinyCrypt\u3002<\/p>\n
1.2 \u975e\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5<\/h3>\n
\u975e\u5bf9\u79f0\u52a0\u5bc6\u4f7f\u7528\u4e00\u5bf9\u5bc6\u94a5:\u516c\u94a5\u548c\u79c1\u94a5\u3002<\/p>\n
\u516c\u94a5\u7528\u4e8e\u52a0\u5bc6\uff0c\u79c1\u94a5\u7528\u4e8e\u89e3\u5bc6\uff0c\u6216\u8005\u53cd\u8fc7\u6765\u7528\u4e8e\u6570\u5b57\u7b7e\u540d\u3002<\/p>\n
\u5e38\u89c1\u7684\u975e\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u6709 RSA\u3001ECC\uff08\u692d\u5706\u66f2\u7ebf\u52a0\u5bc6\uff09\u7b49\u3002<\/p>\n
\u975e\u5bf9\u79f0\u52a0\u5bc6\u7684\u4f18\u70b9\u662f\u5bc6\u94a5\u5206\u53d1\u65b9\u4fbf\uff0c\u516c\u94a5\u53ef\u4ee5\u516c\u5f00\u4f20\u8f93\uff0c\u4e0d\u7528\u62c5\u5fc3\u88ab\u622a\u83b7\u3002<\/p>\n
\u4f46\u7f3a\u70b9\u662f\u8ba1\u7b97\u91cf\u5927\uff0c\u901f\u5ea6\u6162\uff0c\u4e0d\u9002\u5408\u52a0\u5bc6\u5927\u91cf\u6570\u636e\u3002<\/p>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528\u975e\u5bf9\u79f0\u52a0\u5bc6\u6765\u4ea4\u6362\u5bf9\u79f0\u5bc6\u94a5\uff0c\u6216\u8005\u7528\u4e8e\u6570\u5b57\u7b7e\u540d\u9a8c\u8bc1\u56fa\u4ef6\u7684\u5b8c\u6574\u6027\u3002<\/p>\n
\u6bd4\u5982\u5728\u6c7d\u8f66\u7535\u5b50\u7cfb\u7edf\u4e2d\uff0cECU\uff08\u7535\u5b50\u63a7\u5236\u5355\u5143\uff09\u56fa\u4ef6\u66f4\u65b0\u65f6\uff0c\u5c31\u9700\u8981\u9a8c\u8bc1\u56fa\u4ef6\u7684\u6570\u5b57\u7b7e\u540d\uff0c\u786e\u4fdd\u56fa\u4ef6\u6765\u81ea\u53ef\u4fe1\u7684\u6765\u6e90\uff0c\u6ca1\u6709\u88ab\u7be1\u6539\u3002<\/p>\n
\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u7528\u5230\u4e86\u975e\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u3002<\/p>\n
#include "mbedtls\/rsa.h"\n#include "mbedtls\/sha256.h"\n\u200b\n\/\/ \u9a8c\u8bc1\u56fa\u4ef6\u7b7e\u540d\nint verify_firmware_signature(uint8_t *firmware\uff0c uint32_t fw_size\uff0c\n                               uint8_t *signature\uff0c uint8_t *public_key)\n{\n    mbedtls_rsa_context rsa;\n    unsigned char hash[32];\n    int ret;\n    \n    \/\/ \u8ba1\u7b97\u56fa\u4ef6\u7684SHA-256\u54c8\u5e0c\u503c\n    mbedtls_sha256(firmware\uff0c fw_size\uff0c hash\uff0c 0);\n    \n    \/\/ \u521d\u59cb\u5316RSA\u4e0a\u4e0b\u6587\n    mbedtls_rsa_init(&rsa\uff0c MBEDTLS_RSA_PKCS_V15\uff0c 0);\n    \n    \/\/ \u5bfc\u5165\u516c\u94a5\n    ret = mbedtls_rsa_import_raw(&rsa\uff0c \n                                 public_key\uff0c 256\uff0c     \/\/ N\n                                 NULL\uff0c 0\uff0c             \/\/ P\n                                 NULL\uff0c 0\uff0c             \/\/ Q\n                                 NULL\uff0c 0\uff0c             \/\/ D\n                                 public_key + 256\uff0c 4); \/\/ E\n    \n    if (ret != 0)\n    {\n        mbedtls_rsa_free(&rsa);\n        return -1;\n    }\n    \n    \/\/ \u9a8c\u8bc1\u7b7e\u540d\n    ret = mbedtls_rsa_pkcs1_verify(&rsa\uff0c NULL\uff0c NULL\uff0c\n                                   MBEDTLS_RSA_PUBLIC\uff0c\n                                   MBEDTLS_MD_SHA256\uff0c\n                                   32\uff0c hash\uff0c signature);\n    \n    mbedtls_rsa_free(&rsa);\n    \n    return ret;\n}<\/code><\/pre>\n
\u8fd9\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 RSA \u7b97\u6cd5\u9a8c\u8bc1\u56fa\u4ef6\u7b7e\u540d\u3002<\/p>\n
\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u4f1a\u5148\u7528 SHA-256 \u8ba1\u7b97\u56fa\u4ef6\u7684\u54c8\u5e0c\u503c\uff0c\u7136\u540e\u7528 RSA \u516c\u94a5\u9a8c\u8bc1\u7b7e\u540d\u662f\u5426\u6b63\u786e\u3002<\/p>\n
\u5982\u679c\u9a8c\u8bc1\u901a\u8fc7\uff0c\u8bf4\u660e\u56fa\u4ef6\u786e\u5b9e\u6765\u81ea\u53ef\u4fe1\u7684\u53d1\u5e03\u8005\uff0c\u5e76\u4e14\u6ca1\u6709\u88ab\u7be1\u6539\u3002<\/p>\n
1.3 \u54c8\u5e0c\u7b97\u6cd5<\/h3>\n
\u54c8\u5e0c\u7b97\u6cd5\u867d\u7136\u4e0d\u662f\u52a0\u5bc6\u7b97\u6cd5\uff0c\u4f46\u5728\u5bc6\u7801\u5b66\u4e2d\u540c\u6837\u91cd\u8981\u3002<\/p>\n
\u54c8\u5e0c\u7b97\u6cd5\u53ef\u4ee5\u5c06\u4efb\u610f\u957f\u5ea6\u7684\u6570\u636e\u8f6c\u6362\u6210\u56fa\u5b9a\u957f\u5ea6\u7684\u54c8\u5e0c\u503c\uff0c\u5177\u6709\u5355\u5411\u6027\u548c\u6297\u78b0\u649e\u6027\u3002<\/p>\n
\u5e38\u89c1\u7684\u54c8\u5e0c\u7b97\u6cd5\u6709 MD5\u3001SHA-1\u3001SHA-256 \u7b49\uff0c\u5176\u4e2d SHA-256 \u662f\u76ee\u524d\u63a8\u8350\u4f7f\u7528\u7684\u5b89\u5168\u54c8\u5e0c\u7b97\u6cd5\u3002<\/p>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u54c8\u5e0c\u7b97\u6cd5\u5e38\u7528\u4e8e\u5bc6\u7801\u5b58\u50a8\u3001\u6570\u636e\u5b8c\u6574\u6027\u6821\u9a8c\u3001\u6d88\u606f\u8ba4\u8bc1\u7801\uff08MAC\uff09\u7b49\u573a\u666f\u3002<\/p>\n
\u6bd4\u5982\u6211\u4eec\u5728\u8bbe\u5907\u4e0a\u5b58\u50a8\u7528\u6237\u5bc6\u7801\u65f6\uff0c\u4e0d\u5e94\u8be5\u76f4\u63a5\u5b58\u50a8\u660e\u6587\u5bc6\u7801\uff0c\u800c\u662f\u5b58\u50a8\u5bc6\u7801\u7684\u54c8\u5e0c\u503c\u3002<\/p>\n
\u5f53\u7528\u6237\u767b\u5f55\u65f6\uff0c\u6211\u4eec\u8ba1\u7b97\u8f93\u5165\u5bc6\u7801\u7684\u54c8\u5e0c\u503c\uff0c\u4e0e\u5b58\u50a8\u7684\u54c8\u5e0c\u503c\u6bd4\u5bf9\uff0c\u5982\u679c\u4e00\u81f4\u5219\u8ba4\u8bc1\u901a\u8fc7\u3002<\/p>\n
#include "mbedtls\/sha256.h"\n#include <string.h>\n\u200b\n\/\/ \u5b58\u50a8\u7684\u5bc6\u7801\u54c8\u5e0c\u503c\nuint8_t stored_password_hash[32];\n\u200b\n\/\/ \u8bbe\u7f6e\u5bc6\u7801\uff08\u521d\u59cb\u5316\u65f6\u8c03\u7528\uff09\nvoid set_password(const char *password)\n{\n    mbedtls_sha256((uint8_t *)password\uff0c strlen(password)\uff0c \n                   stored_password_hash\uff0c 0);\n}\n\u200b\n\/\/ \u9a8c\u8bc1\u5bc6\u7801\nint verify_password(const char *input_password)\n{\n    uint8_t input_hash[32];\n    \n    \/\/ \u8ba1\u7b97\u8f93\u5165\u5bc6\u7801\u7684\u54c8\u5e0c\u503c\n    mbedtls_sha256((uint8_t *)input_password\uff0c strlen(input_password)\uff0c \n                   input_hash\uff0c 0);\n    \n    \/\/ \u6bd4\u5bf9\u54c8\u5e0c\u503c\n    if (memcmp(stored_password_hash\uff0c input_hash\uff0c 32) == 0)\n    {\n        return 1; \/\/ \u5bc6\u7801\u6b63\u786e\n    }\n    else\n    {\n        return 0; \/\/ \u5bc6\u7801\u9519\u8bef\n    }\n}<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u5f0f\u5373\u4f7f\u6570\u636e\u5e93\u88ab\u653b\u51fb\u8005\u83b7\u53d6\uff0c\u653b\u51fb\u8005\u4e5f\u65e0\u6cd5\u76f4\u63a5\u5f97\u5230\u7528\u6237\u7684\u660e\u6587\u5bc6\u7801\uff0c\u56e0\u4e3a\u54c8\u5e0c\u7b97\u6cd5\u662f\u5355\u5411\u7684\uff0c\u65e0\u6cd5\u4ece\u54c8\u5e0c\u503c\u53cd\u63a8\u51fa\u539f\u59cb\u5bc6\u7801\u3002<\/p>\n
\u5f53\u7136\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u6211\u4eec\u8fd8\u4f1a\u52a0\u76d0\uff08salt\uff09\u6765\u8fdb\u4e00\u6b65\u63d0\u9ad8\u5b89\u5168\u6027\uff0c\u9632\u6b62\u5f69\u8679\u8868\u653b\u51fb\u3002<\/p>\n
2. \u5bc6\u94a5\u7ba1\u7406\u7b56\u7565<\/h2>\n
2.1 \u5bc6\u94a5\u751f\u6210<\/h3>\n
\u5bc6\u94a5\u7684\u5b89\u5168\u6027\u76f4\u63a5\u51b3\u5b9a\u4e86\u52a0\u5bc6\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3002<\/p>\n
\u4e00\u4e2a\u597d\u7684\u5bc6\u94a5\u5e94\u8be5\u5177\u6709\u8db3\u591f\u7684\u968f\u673a\u6027\u548c\u71b5\u503c\u3002<\/p>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u786c\u4ef6\u968f\u673a\u6570\u751f\u6210\u5668\uff08TRNG\uff09\u6765\u751f\u6210\u9ad8\u8d28\u91cf\u7684\u968f\u673a\u5bc6\u94a5\u3002<\/p>\n
STM32 \u7cfb\u5217\u82af\u7247\u901a\u5e38\u90fd\u96c6\u6210\u4e86\u786c\u4ef6\u968f\u673a\u6570\u751f\u6210\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u5b83\u6765\u751f\u6210\u5bc6\u94a5:<\/p>\n
#include "stm32f4xx_hal.h"\n\u200b\nRNG_HandleTypeDef hrng;\n\u200b\n\/\/ \u521d\u59cb\u5316\u968f\u673a\u6570\u751f\u6210\u5668\nvoid RNG_Init(void)\n{\n    __HAL_RCC_RNG_CLK_ENABLE();\n    \n    hrng.Instance = RNG;\n    \n    if (HAL_RNG_Init(&hrng) != HAL_OK)\n    {\n        Error_Handler();\n    }\n}\n\u200b\n\/\/ \u751f\u6210AES\u5bc6\u94a5\nHAL_StatusTypeDef generate_aes_key(uint8_t *key\uff0c uint16_t key_size)\n{\n    uint32_t random_number;\n    HAL_StatusTypeDef status;\n    \n    for (uint16_t i = 0; i < key_size; i += 4)\n    {\n        status = HAL_RNG_GenerateRandomNumber(&hrng\uff0c &random_number);\n        \n        if (status != HAL_OK)\n        {\n            return status;\n        }\n        \n        \/\/ \u5c0632\u4f4d\u968f\u673a\u6570\u62c6\u5206\u62104\u4e2a\u5b57\u8282\n        key[i] = (random_number >> 0) & 0xFF;\n        key[i+1] = (random_number >> 8) & 0xFF;\n        key[i+2] = (random_number >> 16) & 0xFF;\n        key[i+3] = (random_number >> 24) & 0xFF;\n    }\n    \n    return HAL_OK;\n}<\/code><\/pre>\n
\u4f7f\u7528\u786c\u4ef6\u968f\u673a\u6570\u751f\u6210\u5668\u751f\u6210\u7684\u5bc6\u94a5\u5177\u6709\u5f88\u597d\u7684\u968f\u673a\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u62b5\u5fa1\u66b4\u529b\u7834\u89e3\u653b\u51fb\u3002<\/p>\n
\u5982\u679c\u82af\u7247\u4e0d\u652f\u6301\u786c\u4ef6\u968f\u673a\u6570\u751f\u6210\u5668\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528\u8f6f\u4ef6\u65b9\u6cd5\uff0c\u6bd4\u5982\u6536\u96c6\u7cfb\u7edf\u8fd0\u884c\u65f6\u7684\u5404\u79cd\u4e0d\u786e\u5b9a\u56e0\u7d20\uff08\u5982 ADC \u566a\u58f0\u3001\u5b9a\u65f6\u5668\u8ba1\u6570\u503c\u7b49\uff09\u4f5c\u4e3a\u71b5\u6e90\u6765\u751f\u6210\u968f\u673a\u6570\u3002<\/p>\n
2.2 \u5bc6\u94a5\u5b58\u50a8<\/h3>\n
\u5bc6\u94a5\u7684\u5b58\u50a8\u662f\u5bc6\u94a5\u7ba1\u7406\u4e2d\u6700\u5173\u952e\u7684\u73af\u8282\u3002<\/p>\n
\u5982\u679c\u5bc6\u94a5\u88ab\u653b\u51fb\u8005\u83b7\u53d6\uff0c\u6574\u4e2a\u52a0\u5bc6\u7cfb\u7edf\u5c31\u5f62\u540c\u865a\u8bbe\u3002<\/p>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u6709\u51e0\u79cd\u5e38\u89c1\u7684\u5bc6\u94a5\u5b58\u50a8\u65b9\u6848:<\/p>\n
\u7b2c\u4e00\u79cd\u662f\u5c06\u5bc6\u94a5\u5b58\u50a8\u5728 Flash \u4e2d\u3002<\/p>\n
\u8fd9\u662f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u4f46\u5b89\u5168\u6027\u8f83\u4f4e\uff0c\u56e0\u4e3a Flash \u7684\u5185\u5bb9\u53ef\u4ee5\u901a\u8fc7\u8c03\u8bd5\u63a5\u53e3\u8bfb\u53d6\u3002<\/p>\n
\u4e3a\u4e86\u63d0\u9ad8\u5b89\u5168\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u542f\u7528 Flash \u8bfb\u4fdd\u62a4\u529f\u80fd\uff0c\u9632\u6b62\u901a\u8fc7 JTAG \u6216 SWD \u63a5\u53e3\u8bfb\u53d6 Flash \u5185\u5bb9\u3002<\/p>\n
\/\/ \u5728Flash\u4e2d\u5b9a\u4e49\u5bc6\u94a5\u5b58\u50a8\u533a\u57df\uff08\u4f7f\u7528__attribute__\u6307\u5b9a\u5730\u5740\uff09\n__attribute__((section(".key_section"))) \nconst uint8_t aes_key[16] = {\n    0x2b\uff0c 0x7e\uff0c 0x15\uff0c 0x16\uff0c 0x28\uff0c 0xae\uff0c 0xd2\uff0c 0xa6\uff0c\n    0xab\uff0c 0xf7\uff0c 0x15\uff0c 0x88\uff0c 0x09\uff0c 0xcf\uff0c 0x4f\uff0c 0x3c\n};\n\u200b\n\/\/ \u542f\u7528Flash\u8bfb\u4fdd\u62a4\nvoid enable_flash_protection(void)\n{\n    FLASH_OBProgramInitTypeDef ob_config;\n    \n    HAL_FLASH_Unlock();\n    HAL_FLASH_OB_Unlock();\n    \n    ob_config.OptionType = OPTIONBYTE_RDP;\n    ob_config.RDPLevel = OB_RDP_LEVEL_1; \/\/ \u8bbe\u7f6e\u8bfb\u4fdd\u62a4\u7ea7\u522b1\n    \n    if (HAL_FLASHEx_OBProgram(&ob_config) != HAL_OK)\n    {\n        Error_Handler();\n    }\n    \n    HAL_FLASH_OB_Launch(); \/\/ \u4f7f\u914d\u7f6e\u751f\u6548\n    HAL_FLASH_OB_Lock();\n    HAL_FLASH_Lock();\n}<\/code><\/pre>\n
\u7b2c\u4e8c\u79cd\u662f\u4f7f\u7528\u5b89\u5168\u5143\u4ef6\u6216\u52a0\u5bc6\u82af\u7247\u3002<\/p>\n
\u8fd9\u4e9b\u4e13\u7528\u82af\u7247\u5185\u90e8\u6709\u5b89\u5168\u5b58\u50a8\u533a\u57df\uff0c\u5bc6\u94a5\u5b58\u50a8\u5728\u82af\u7247\u5185\u90e8\uff0c\u6c38\u8fdc\u4e0d\u4f1a\u4ee5\u660e\u6587\u5f62\u5f0f\u66b4\u9732\u51fa\u6765\u3002<\/p>\n
\u52a0\u5bc6\u64cd\u4f5c\u4e5f\u5728\u82af\u7247\u5185\u90e8\u5b8c\u6210\uff0c\u5373\u4f7f\u653b\u51fb\u8005\u7269\u7406\u63a5\u89e6\u5230\u8bbe\u5907\uff0c\u4e5f\u5f88\u96be\u63d0\u53d6\u51fa\u5bc6\u94a5\u3002<\/p>\n
\u5e38\u89c1\u7684\u5b89\u5168\u82af\u7247\u6709 ATECC608\u3001SE050 \u7b49\u3002<\/p>\n
\u7b2c\u4e09\u79cd\u662f\u4f7f\u7528\u82af\u7247\u7684 OTP\uff08\u4e00\u6b21\u6027\u53ef\u7f16\u7a0b\uff09\u533a\u57df\u6216\u5b89\u5168\u5b58\u50a8\u533a\u57df\u3002<\/p>\n
\u6bd4\u5982 STM32L5 \u7cfb\u5217\u82af\u7247\u63d0\u4f9b\u4e86 TrustZone \u6280\u672f\uff0c\u53ef\u4ee5\u5c06\u5bc6\u94a5\u5b58\u50a8\u5728\u5b89\u5168\u533a\u57df\uff0c\u53ea\u6709\u5b89\u5168\u4ee3\u7801\u624d\u80fd\u8bbf\u95ee\u3002<\/p>\n
2.3 \u5bc6\u94a5\u5206\u53d1\u4e0e\u4ea4\u6362<\/h3>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5728\u591a\u4e2a\u8bbe\u5907\u4e4b\u95f4\u5171\u4eab\u5bc6\u94a5\uff0c\u6216\u8005\u52a8\u6001\u66f4\u65b0\u5bc6\u94a5\u3002<\/p>\n
\u5bc6\u94a5\u5206\u53d1\u548c\u4ea4\u6362\u662f\u4e00\u4e2a\u590d\u6742\u7684\u95ee\u9898\uff0c\u9700\u8981\u4ed4\u7ec6\u8bbe\u8ba1\u3002<\/p>\n
\u5bf9\u4e8e\u5bf9\u79f0\u52a0\u5bc6\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5bc6\u94a5\u4ea4\u6362\u534f\u8bae\uff0c\u6bd4\u5982 Diffie-Hellman \u5bc6\u94a5\u4ea4\u6362\u534f\u8bae\u3002<\/p>\n
\u8fd9\u4e2a\u534f\u8bae\u5141\u8bb8\u4e24\u4e2a\u8bbe\u5907\u5728\u4e0d\u5b89\u5168\u7684\u4fe1\u9053\u4e0a\u534f\u5546\u51fa\u4e00\u4e2a\u5171\u4eab\u5bc6\u94a5\uff0c\u800c\u4e0d\u7528\u62c5\u5fc3\u88ab\u7a83\u542c\u3002<\/p>\n
#include "mbedtls\/dhm.h"\n\u200b\nmbedtls_dhm_context dhm;\n\u200b\n\/\/ \u521d\u59cb\u5316DH\u5bc6\u94a5\u4ea4\u6362\nint dhm_init(void)\n{\n    const char *dhm_P = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"\n                        "29024E088A67CC74020BBEA63B139B22514A08798E3404DD"\n                        "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"\n                        "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED"\n                        "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"\n                        "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F"\n                        "83655D23DCA3AD961C62F356208552BB9ED529077096966D"\n                        "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B"\n                        "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"\n                        "DE2BCBF6955817183995497CEA956AE515D2261898FA0510"\n                        "15728E5A8AACAA68FFFFFFFFFFFFFFFF";\n    \n    const char *dhm_G = "02";\n    \n    mbedtls_dhm_init(&dhm);\n    \n    return mbedtls_mpi_read_string(&dhm.P\uff0c 16\uff0c dhm_P) ||\n           mbedtls_mpi_read_string(&dhm.G\uff0c 16\uff0c dhm_G);\n}\n\u200b\n\/\/ \u751f\u6210\u516c\u94a5\nint dhm_make_public(uint8_t *output\uff0c size_t *olen)\n{\n    int ret;\n    \n    ret = mbedtls_dhm_make_public(&dhm\uff0c 256\uff0c output\uff0c *olen\uff0c\n                                  mbedtls_ctr_drbg_random\uff0c &ctr_drbg);\n    \n    if (ret == 0)\n    {\n        *olen = mbedtls_mpi_size(&dhm.GX);\n    }\n    \n    return ret;\n}\n\u200b\n\/\/ \u8ba1\u7b97\u5171\u4eab\u5bc6\u94a5\nint dhm_calc_secret(uint8_t *peer_public\uff0c size_t peer_len\uff0c\n                    uint8_t *output\uff0c size_t *olen)\n{\n    int ret;\n    \n    ret = mbedtls_dhm_read_public(&dhm\uff0c peer_public\uff0c peer_len);\n    \n    if (ret != 0)\n    {\n        return ret;\n    }\n    \n    ret = mbedtls_dhm_calc_secret(&dhm\uff0c output\uff0c *olen\uff0c olen\uff0c\n                                  mbedtls_ctr_drbg_random\uff0c &ctr_drbg);\n    \n    return ret;\n}<\/code><\/pre>\n
\u901a\u8fc7 DH \u5bc6\u94a5\u4ea4\u6362\uff0c\u4e24\u4e2a\u8bbe\u5907\u53ef\u4ee5\u5404\u81ea\u751f\u6210\u4e00\u5bf9\u516c\u79c1\u94a5\uff0c\u4ea4\u6362\u516c\u94a5\u540e\u8ba1\u7b97\u51fa\u76f8\u540c\u7684\u5171\u4eab\u5bc6\u94a5\u3002<\/p>\n
\u8fd9\u4e2a\u5171\u4eab\u5bc6\u94a5\u53ef\u4ee5\u7528\u4f5c AES \u7b49\u5bf9\u79f0\u52a0\u5bc6\u7b97\u6cd5\u7684\u5bc6\u94a5\u3002<\/p>\n
\u53e6\u4e00\u79cd\u5e38\u89c1\u7684\u65b9\u6848\u662f\u4f7f\u7528\u975e\u5bf9\u79f0\u52a0\u5bc6\u6765\u4f20\u8f93\u5bf9\u79f0\u5bc6\u94a5\u3002<\/p>\n
\u53d1\u9001\u65b9\u7528\u63a5\u6536\u65b9\u7684\u516c\u94a5\u52a0\u5bc6\u5bf9\u79f0\u5bc6\u94a5\uff0c\u63a5\u6536\u65b9\u7528\u81ea\u5df1\u7684\u79c1\u94a5\u89e3\u5bc6\u5f97\u5230\u5bf9\u79f0\u5bc6\u94a5\u3002<\/p>\n
\u8fd9\u79cd\u65b9\u5f0f\u7ed3\u5408\u4e86\u975e\u5bf9\u79f0\u52a0\u5bc6\u7684\u5bc6\u94a5\u5206\u53d1\u4f18\u52bf\u548c\u5bf9\u79f0\u52a0\u5bc6\u7684\u9ad8\u6548\u6027\u3002<\/p>\n
2.4 \u5bc6\u94a5\u66f4\u65b0\u4e0e\u64a4\u9500<\/h3>\n
\u5bc6\u94a5\u4e0d\u5e94\u8be5\u6c38\u4e45\u4f7f\u7528\uff0c\u5b9a\u671f\u66f4\u65b0\u5bc6\u94a5\u53ef\u4ee5\u964d\u4f4e\u5bc6\u94a5\u6cc4\u9732\u7684\u98ce\u9669\u3002<\/p>\n
\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbe\u8ba1\u5bc6\u94a5\u66f4\u65b0\u673a\u5236\uff0c\u6bd4\u5982\u6bcf\u9694\u4e00\u5b9a\u65f6\u95f4\u6216\u8005\u4f20\u8f93\u4e00\u5b9a\u6570\u91cf\u7684\u6570\u636e\u540e\u81ea\u52a8\u66f4\u65b0\u5bc6\u94a5\u3002<\/p>\n
#include <time.h>\n\u200b\ntypedef struct {\n    uint8_t key[16];\n    time_t creation_time;\n    uint32_t usage_count;\n} key_info_t;\n\u200b\nkey_info_t current_key;\n\u200b\n#define KEY_LIFETIME_SECONDS (24 * 3600)  \/\/ \u5bc6\u94a5\u6709\u6548\u671f24\u5c0f\u65f6\n#define KEY_USAGE_LIMIT 10000              \/\/ \u5bc6\u94a5\u4f7f\u7528\u6b21\u6570\u9650\u5236\n\u200b\n\/\/ \u68c0\u67e5\u662f\u5426\u9700\u8981\u66f4\u65b0\u5bc6\u94a5\nint check_key_update_needed(void)\n{\n    time_t current_time = time(NULL);\n    \n    \/\/ \u68c0\u67e5\u5bc6\u94a5\u662f\u5426\u8fc7\u671f\n    if (current_time - current_key.creation_time > KEY_LIFETIME_SECONDS)\n    {\n        return 1;\n    }\n    \n    \/\/ \u68c0\u67e5\u5bc6\u94a5\u4f7f\u7528\u6b21\u6570\u662f\u5426\u8d85\u9650\n    if (current_key.usage_count > KEY_USAGE_LIMIT)\n    {\n        return 1;\n    }\n    \n    return 0;\n}\n\u200b\n\/\/ \u66f4\u65b0\u5bc6\u94a5\nint update_key(void)\n{\n    \/\/ \u751f\u6210\u65b0\u5bc6\u94a5\n    if (generate_aes_key(current_key.key\uff0c 16) != HAL_OK)\n    {\n        return -1;\n    }\n    \n    \/\/ \u66f4\u65b0\u5bc6\u94a5\u4fe1\u606f\n    current_key.creation_time = time(NULL);\n    current_key.usage_count = 0;\n    \n    \/\/ \u4fdd\u5b58\u65b0\u5bc6\u94a5\u5230\u5b89\u5168\u5b58\u50a8\n    save_key_to_flash(&current_key);\n    \n    return 0;\n}\n\u200b\n\/\/ \u4f7f\u7528\u5bc6\u94a5\u8fdb\u884c\u52a0\u5bc6\nint encrypt_with_key_management(uint8_t *plaintext\uff0c uint8_t *ciphertext\uff0c \n                                 uint16_t size)\n{\n    \/\/ \u68c0\u67e5\u662f\u5426\u9700\u8981\u66f4\u65b0\u5bc6\u94a5\n    if (check_key_update_needed())\n    {\n        if (update_key() != 0)\n        {\n            return -1;\n        }\n    }\n    \n    \/\/ \u6267\u884c\u52a0\u5bc6\n    if (AES_Encrypt(plaintext\uff0c current_key.key\uff0c ciphertext\uff0c size) != HAL_OK)\n    {\n        return -1;\n    }\n    \n    \/\/ \u589e\u52a0\u4f7f\u7528\u8ba1\u6570\n    current_key.usage_count++;\n    \n    return 0;\n}<\/code><\/pre>\n
\u8fd9\u4e2a\u4f8b\u5b50\u5c55\u793a\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u5bc6\u94a5\u66f4\u65b0\u673a\u5236\uff0c\u6839\u636e\u65f6\u95f4\u548c\u4f7f\u7528\u6b21\u6570\u6765\u51b3\u5b9a\u662f\u5426\u66f4\u65b0\u5bc6\u94a5\u3002<\/p>\n
\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5bc6\u94a5\u66f4\u65b0\u8fd8\u9700\u8981\u8003\u8651\u4e0e\u5bf9\u7aef\u8bbe\u5907\u7684\u540c\u6b65\u95ee\u9898\uff0c\u786e\u4fdd\u53cc\u65b9\u4f7f\u7528\u76f8\u540c\u7684\u5bc6\u94a5\u3002<\/p>\n
3. \u5b9e\u9645\u5e94\u7528\u6848\u4f8b<\/h2>\n
3.1 \u5b89\u5168\u56fa\u4ef6\u5347\u7ea7<\/h3>\n
\u5728\u6211\u4e4b\u524d\u505a\u6c7d\u8f66\u7535\u5b50\u9879\u76ee\u65f6\uff0cECU \u56fa\u4ef6\u5347\u7ea7\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\u3002<\/p>\n
\u6211\u4eec\u9700\u8981\u786e\u4fdd\u53ea\u6709\u7ecf\u8fc7\u6388\u6743\u7684\u56fa\u4ef6\u624d\u80fd\u88ab\u5b89\u88c5\u5230 ECU \u4e0a\uff0c\u9632\u6b62\u6076\u610f\u56fa\u4ef6\u88ab\u690d\u5165\u3002<\/p>\n
\u6574\u4e2a\u6d41\u7a0b\u662f\u8fd9\u6837\u7684:\u9996\u5148\uff0c\u56fa\u4ef6\u5728\u53d1\u5e03\u65f6\u4f1a\u7528\u79c1\u94a5\u8fdb\u884c\u7b7e\u540d\u3002<\/p>\n
ECU \u5728\u63a5\u6536\u5230\u65b0\u56fa\u4ef6\u540e\uff0c\u4f1a\u7528\u9884\u5148\u5b58\u50a8\u7684\u516c\u94a5\u9a8c\u8bc1\u7b7e\u540d\u3002<\/p>\n
\u53ea\u6709\u7b7e\u540d\u9a8c\u8bc1\u901a\u8fc7\u7684\u56fa\u4ef6\u624d\u4f1a\u88ab\u5b89\u88c5\u3002<\/p>\n
\u540c\u65f6\uff0c\u56fa\u4ef6\u672c\u8eab\u662f\u52a0\u5bc6\u7684\uff0c\u4f7f\u7528 AES \u52a0\u5bc6\uff0c\u5bc6\u94a5\u901a\u8fc7\u5b89\u5168\u4fe1\u9053\u4f20\u8f93\u5230 ECU\u3002<\/p>\n
typedef struct {\n    uint32_t version;\n    uint32_t size;\n    uint8_t signature[256];\n    uint8_t encrypted_firmware[];\n} firmware_package_t;\n\u200b\n\/\/ \u56fa\u4ef6\u5347\u7ea7\u6d41\u7a0b\nint firmware_upgrade(firmware_package_t *package)\n{\n    uint8_t *decrypted_firmware;\n    uint8_t aes_key[16];\n    \n    \/\/ 1. \u9a8c\u8bc1\u56fa\u4ef6\u7b7e\u540d\n    if (verify_firmware_signature(package->encrypted_firmware\uff0c\n                                   package->size\uff0c\n                                   package->signature\uff0c\n                                   public_key) != 0)\n    {\n        printf("Signature verification failed!\/n");\n        return -1;\n    }\n    \n    \/\/ 2. \u83b7\u53d6\u89e3\u5bc6\u5bc6\u94a5\uff08\u901a\u8fc7\u5b89\u5168\u4fe1\u9053\uff09\n    if (get_decryption_key(aes_key) != 0)\n    {\n        printf("Failed to get decryption key!\/n");\n        return -1;\n    }\n    \n    \/\/ 3. \u89e3\u5bc6\u56fa\u4ef6\n    decrypted_firmware = malloc(package->size);\n    if (AES_Decrypt(package->encrypted_firmware\uff0c aes_key\uff0c\n                    decrypted_firmware\uff0c package->size) != HAL_OK)\n    {\n        printf("Firmware decryption failed!\/n");\n        free(decrypted_firmware);\n        return -1;\n    }\n    \n    \/\/ 4. \u5199\u5165Flash\n    if (write_firmware_to_flash(decrypted_firmware\uff0c package->size) != 0)\n    {\n        printf("Failed to write firmware to flash!\/n");\n        free(decrypted_firmware);\n        return -1;\n    }\n    \n    free(decrypted_firmware);\n    \n    printf("Firmware upgrade successful!\/n");\n    return 0;\n}<\/code><\/pre>\n
\u8fd9\u79cd\u65b9\u6848\u7ed3\u5408\u4e86\u975e\u5bf9\u79f0\u52a0\u5bc6\uff08\u6570\u5b57\u7b7e\u540d\uff09\u548c\u5bf9\u79f0\u52a0\u5bc6\uff08AES \u52a0\u5bc6\u56fa\u4ef6\uff09\uff0c\u65e2\u4fdd\u8bc1\u4e86\u56fa\u4ef6\u6765\u6e90\u7684\u53ef\u4fe1\u6027\uff0c\u53c8\u4fdd\u62a4\u4e86\u56fa\u4ef6\u5185\u5bb9\u4e0d\u88ab\u7a83\u53d6\u3002<\/p>\n
3.2 \u5b89\u5168\u901a\u4fe1<\/h3>\n
\u5728\u7269\u8054\u7f51\u8bbe\u5907\u4e2d\uff0c\u8bbe\u5907\u4e0e\u4e91\u7aef\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u9700\u8981\u52a0\u5bc6\u4fdd\u62a4\u3002<\/p>\n
\u6211\u4eec\u901a\u5e38\u4f7f\u7528 TLS\/SSL \u534f\u8bae\u6765\u5efa\u7acb\u5b89\u5168\u8fde\u63a5\u3002<\/p>\n
TLS \u534f\u8bae\u5185\u90e8\u5c31\u7efc\u5408\u4f7f\u7528\u4e86\u5bf9\u79f0\u52a0\u5bc6\u3001\u975e\u5bf9\u79f0\u52a0\u5bc6\u548c\u54c8\u5e0c\u7b97\u6cd5\u3002<\/p>\n
\u5728\u5d4c\u5165\u5f0f Linux \u7cfb\u7edf\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 OpenSSL \u6216 mbedTLS \u5e93\u6765\u5b9e\u73b0 TLS \u901a\u4fe1\uff1a<\/p>\n
#include "mbedtls\/net_sockets.h"\n#include "mbedtls\/ssl.h"\n\nmbedtls_net_context server_fd;\nmbedtls_ssl_context ssl;\nmbedtls_ssl_config conf;\n\n\/\/ \u5efa\u7acbTLS\u8fde\u63a5\nint establish_tls_connection(const char *server_addr\uff0c const char *server_port)\n{\n    int ret;\n\n    \/\/ \u521d\u59cb\u5316\n    mbedtls_net_init(&server_fd);\n    mbedtls_ssl_init(&ssl);\n    mbedtls_ssl_config_init(&conf);\n\n    \/\/ \u8fde\u63a5\u670d\u52a1\u5668\n    ret = mbedtls_net_connect(&server_fd\uff0c server_addr\uff0c server_port\uff0c\n                              MBEDTLS_NET_PROTO_TCP);\n    if (ret != 0)\n    {\n        printf("Failed to connect to server\/n");\n        return -1;\n    }\n\n    \/\/ \u914d\u7f6eSSL\n    ret = mbedtls_ssl_config_defaults(&conf\uff0c\n                                      MBEDTLS_SSL_IS_CLIENT\uff0c\n                                      MBEDTLS_SSL_TRANSPORT_STREAM\uff0c\n                                      MBEDTLS_SSL_PRESET_DEFAULT);\n    if (ret != 0)\n    {\n        printf("Failed to set SSL config\/n");\n        return -1;\n    }\n\n    mbedtls_ssl_conf_authmode(&conf\uff0c MBEDTLS_SSL_VERIFY_REQUIRED);\n    mbedtls_ssl_conf_ca_chain(&conf\uff0c &cacert\uff0c NULL);\n    mbedtls_ssl_conf_rng(&conf\uff0c mbedtls_ctr_drbg_random\uff0c &ctr_drbg);\n\n    ret = mbedtls_ssl_setup(&ssl\uff0c &conf);\n    if (ret != 0)\n    {\n        printf("Failed to setup SSL\/n");\n        return -1;\n    }\n\n    mbedtls_ssl_set_bio(&ssl\uff0c &server_fd\uff0c mbedtls_net_send\uff0c\n                        mbedtls_net_recv\uff0c NULL);\n\n    \/\/ \u6267\u884cSSL\u63e1\u624b\n    while ((ret = mbedtls_ssl_handshake(&ssl)) != 0)\n    {\n        if (ret != MBEDTLS_ERR_SSL_WANT_READ &&\n            ret != MBEDTLS_ERR_SSL_WANT_WRITE)\n        {\n            printf("SSL handshake failed\/n");\n            return -1;\n        }\n    }\n\n    printf("TLS connection established\/n");\n    return 0;\n}\n\n\/\/ \u901a\u8fc7TLS\u53d1\u9001\u6570\u636e\nint tls_send_data(const uint8_t *data\uff0c size_t len)\n{\n    int ret;\n\n    while ((ret = mbedtls_ssl_write(&ssl\uff0c data\uff0c len)) <= 0)\n    {\n        if (ret != MBEDTLS_ERR_SSL_WANT_READ &&\n            ret != MBEDTLS_ERR_SSL_WANT_WRITE)\n        {\n            printf("Failed to send data\/n");\n            return -1;\n        }\n    }\n\n    return ret;\n}\n\n\/\/ \u901a\u8fc7TLS\u63a5\u6536\u6570\u636e\nint tls_receive_data(uint8_t *buffer\uff0c size_t max_len)\n{\n    int ret;\n\n    ret = mbedtls_ssl_read(&ssl\uff0c buffer\uff0c max_len);\n\n    if (ret == MBEDTLS_ERR_SSL_WANT_READ ||\n        ret == MBEDTLS_ERR_SSL_WANT_WRITE)\n    {\n        return 0;\n    }\n\n    if (ret < 0)\n    {\n        printf("Failed to receive data\/n");\n        return -1;\n    }\n\n    return ret;\n}<\/code><\/pre>\n
TLS \u534f\u8bae\u5728\u63e1\u624b\u9636\u6bb5\u4f7f\u7528\u975e\u5bf9\u79f0\u52a0\u5bc6\u4ea4\u6362\u5bc6\u94a5\uff0c\u5728\u6570\u636e\u4f20\u8f93\u9636\u6bb5\u4f7f\u7528\u5bf9\u79f0\u52a0\u5bc6\u4fdd\u62a4\u6570\u636e\uff0c\u540c\u65f6\u4f7f\u7528\u54c8\u5e0c\u7b97\u6cd5\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3002<\/p>\n
\u8fd9\u79cd\u8bbe\u8ba1\u517c\u987e\u4e86\u5b89\u5168\u6027\u548c\u6027\u80fd\u3002<\/p>\n
4. \u5b89\u5168\u5b9e\u8df5\u5efa\u8bae<\/h2>\n
\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u6211\u603b\u7ed3\u4e86\u4e00\u4e9b\u52a0\u5bc6\u7b97\u6cd5\u548c\u5bc6\u94a5\u7ba1\u7406\u7684\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n
\u7b2c\u4e00\uff0c\u6c38\u8fdc\u4e0d\u8981\u81ea\u5df1\u5b9e\u73b0\u52a0\u5bc6\u7b97\u6cd5\u3002<\/p>\n
\u52a0\u5bc6\u7b97\u6cd5\u7684\u5b9e\u73b0\u975e\u5e38\u590d\u6742\uff0c\u7a0d\u6709\u4e0d\u614e\u5c31\u4f1a\u5f15\u5165\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n
\u5e94\u8be5\u4f7f\u7528\u7ecf\u8fc7\u5e7f\u6cdb\u9a8c\u8bc1\u7684\u52a0\u5bc6\u5e93\uff0c\u6bd4\u5982 mbedTLS\u3001OpenSSL\u3001wolfSSL \u7b49\u3002<\/p>\n
\u7b2c\u4e8c\uff0c\u4e0d\u8981\u5728\u4ee3\u7801\u4e2d\u786c\u7f16\u7801\u5bc6\u94a5\u3002<\/p>\n
\u786c\u7f16\u7801\u7684\u5bc6\u94a5\u5f88\u5bb9\u6613\u88ab\u53cd\u7f16\u8bd1\u5de5\u5177\u63d0\u53d6\u51fa\u6765\u3002<\/p>\n
\u5e94\u8be5\u4f7f\u7528\u5b89\u5168\u5b58\u50a8\u65b9\u6848\uff0c\u6bd4\u5982\u5b89\u5168\u82af\u7247\u3001OTP \u533a\u57df\u7b49\u3002<\/p>\n
\u7b2c\u4e09\uff0c\u4f7f\u7528\u8db3\u591f\u957f\u7684\u5bc6\u94a5\u3002<\/p>\n
\u5bf9\u4e8e AES \u7b97\u6cd5\uff0c\u81f3\u5c11\u4f7f\u7528 128 \u4f4d\u5bc6\u94a5\uff1b\u5bf9\u4e8e RSA \u7b97\u6cd5\uff0c\u81f3\u5c11\u4f7f\u7528 2048 \u4f4d\u5bc6\u94a5\u3002<\/p>\n
\u5bc6\u94a5\u957f\u5ea6\u76f4\u63a5\u5f71\u54cd\u5b89\u5168\u5f3a\u5ea6\u3002<\/p>\n
\u7b2c\u56db\uff0c\u5b9a\u671f\u66f4\u65b0\u5bc6\u94a5\u3002<\/p>\n
\u4e0d\u8981\u8ba9\u4e00\u4e2a\u5bc6\u94a5\u6c38\u4e45\u4f7f\u7528\uff0c\u5e94\u8be5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8bbe\u8ba1\u5bc6\u94a5\u66f4\u65b0\u7b56\u7565\u3002<\/p>\n
\u7b2c\u4e94\uff0c\u4fdd\u62a4\u5bc6\u94a5\u7684\u6574\u4e2a\u751f\u547d\u5468\u671f\u3002<\/p>\n
\u4ece\u5bc6\u94a5\u751f\u6210\u3001\u5b58\u50a8\u3001\u4f7f\u7528\u5230\u9500\u6bc1\uff0c\u6bcf\u4e2a\u73af\u8282\u90fd\u8981\u8003\u8651\u5b89\u5168\u6027\u3002<\/p>\n
\u7279\u522b\u662f\u5bc6\u94a5\u9500\u6bc1\u65f6\uff0c\u8981\u786e\u4fdd\u5bc6\u94a5\u88ab\u5f7b\u5e95\u6e05\u9664\uff0c\u4e0d\u80fd\u7559\u4e0b\u4efb\u4f55\u75d5\u8ff9\u3002<\/p>\n
\u7b2c\u516d\uff0c\u4f7f\u7528\u786c\u4ef6\u52a0\u5bc6\u52a0\u901f\u5668\u3002<\/p>\n
\u73b0\u4ee3 MCU \u901a\u5e38\u90fd\u96c6\u6210\u4e86\u786c\u4ef6\u52a0\u5bc6\u6a21\u5757\uff0c\u4f7f\u7528\u786c\u4ef6\u52a0\u5bc6\u4e0d\u4ec5\u901f\u5ea6\u5feb\uff0c\u800c\u4e14\u66f4\u5b89\u5168\uff0c\u56e0\u4e3a\u5bc6\u94a5\u64cd\u4f5c\u5728\u786c\u4ef6\u5185\u90e8\u5b8c\u6210\uff0c\u4e0d\u5bb9\u6613\u88ab\u4fa7\u4fe1\u9053\u653b\u51fb\u3002<\/p>\n
\u7b2c\u4e03\uff0c\u8fdb\u884c\u5b89\u5168\u6d4b\u8bd5\u3002<\/p>\n
\u5728\u4ea7\u54c1\u53d1\u5e03\u524d\uff0c\u5e94\u8be5\u8fdb\u884c\u5145\u5206\u7684\u5b89\u5168\u6d4b\u8bd5\uff0c\u5305\u62ec\u5bc6\u7801\u5b66\u5206\u6790\u3001\u6e17\u900f\u6d4b\u8bd5\u7b49\uff0c\u786e\u4fdd\u52a0\u5bc6\u7cfb\u7edf\u6ca1\u6709\u660e\u663e\u7684\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n
\u52a0\u5bc6\u7b97\u6cd5\u548c\u5bc6\u94a5\u7ba1\u7406\u662f\u4e00\u4e2a\u590d\u6742\u7684\u8bdd\u9898\uff0c\u6d89\u53ca\u7684\u77e5\u8bc6\u70b9\u5f88\u591a\u3002<\/p>\n
\u4f46\u53ea\u8981\u6211\u4eec\u9075\u5faa\u5b89\u5168\u6700\u4f73\u5b9e\u8df5\uff0c\u9009\u62e9\u5408\u9002\u7684\u52a0\u5bc6\u65b9\u6848\uff0c\u5c31\u80fd\u591f\u4e3a\u5d4c\u5165\u5f0f\u7cfb\u7edf\u6784\u5efa\u8d77\u575a\u56fa\u7684\u5b89\u5168\u9632\u7ebf\u3002<\/p>\n
\u5728\u8fd9\u4e2a\u4e07\u7269\u4e92\u8054\u7684\u65f6\u4ee3\uff0c\u6570\u636e\u5b89\u5168\u53d8\u5f97\u8d8a\u6765\u8d8a\u91cd\u8981\uff0c\u4f5c\u4e3a\u5d4c\u5165\u5f0f\u5f00\u53d1\u8005\uff0c\u6211\u4eec\u6709\u8d23\u4efb\u4fdd\u62a4\u597d\u7528\u6237\u7684\u6570\u636e\u5b89\u5168\u3002<\/p>\n
\u66f4\u591a\u7f16\u7a0b\u5b66\u4e60\u8d44\u6e90<\/strong><\/p>\n