B-U585I-IOT02A开发板测试之PKA加密机制测试

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胤幻1988 发布时间：2021-10-23 17:32

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文章简介:	STM32U585主打了数据安全，当然也提供了多种方式。我们这里用B-U585I-IOT02A开发板测试 PKA加密~

STM32U585主打了数据安全，当然也提供了多种方式。我们这里用B-U585I-IOT02A开发板测试 PKA加密~也就是大家经常在计算机领域听到的公钥加密法~
我们先来看看一些导图：
应用场景：

完全硬件自发，无需CPU干预：

使用流程：

好，由于全在MCU内部，这了也没有什么原理图，我们直接开始CUBEMC的配置：

自动生成代码，我们添加我们的私钥及公钥对，对其进行测试：

PKA_HandleTypeDef hpka;" r% h0 Y0 k q) n
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RNG_HandleTypeDef hrng;0 l8 Z+ [8 r' \
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/* USER CODE BEGIN PV */) l, Q( A# W7 [ H
PKA_ModExpProtectModeInTypeDef in = {0};$ C' q2 M( n: \% q3 m k
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/* Input vectors */
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uint32_t input1_OpSize = 32;
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uint32_t input1_ExpSize = 32;
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uint8_t input1_1[32] = {0xE4, 0x88, 0xD8, 0x11, 0x76, 0xE5, 0x06, 0xFA, 0xB7, 0xC2, 0xFC, 0x5D, 0xF3, 0xCB, 0x75, 0x55, 0x34, 0x3F, 0x45, 0xB4, 0x78, 0x52, 0xBA, 0x7E, 0xFB, 0xF5, 0xB1, 0x2A, 0xF4, 0x0B, 0xF4, 0xB3};
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uint8_t input1_2[32] = {0x12, 0x28, 0x49, 0x3A, 0x81, 0xFE, 0xCA, 0x62, 0x2B, 0x2D, 0x83, 0xCD, 0x97, 0x2C, 0x28, 0x23, 0x39, 0x76, 0xF1, 0xF3, 0x71, 0xCE, 0x16, 0x84, 0xA0, 0x37, 0x98, 0xE0, 0xC7, 0x0B, 0xF4, 0x39};$ g+ x' @ z7 G# u7 [8 x2 Y, o& c
uint8_t input1_3[32] = {0x45, 0xAB, 0x14, 0x95, 0x48, 0x22, 0x69, 0xC4, 0x8F, 0x1E, 0xCA, 0x23, 0x0C, 0x1F, 0x5A, 0xB4, 0xBC, 0xE7, 0x12, 0xD8, 0x50, 0x09, 0x54, 0xBB, 0xE2, 0x1D, 0x2A, 0x39, 0x86, 0x3E, 0xDB, 0xFB};7 S* n7 c/ a1 M2 t! U
uint8_t input1_4[32] = {0xE4, 0x88, 0xD8, 0x11, 0x76, 0xE5, 0x06, 0xFA, 0xB7, 0xC2, 0xFC, 0x5D, 0xF3, 0xCB, 0x75, 0x53, 0x50, 0x7D, 0xA2, 0xCD, 0x98, 0x24, 0x33, 0x76, 0x14, 0x8F, 0xCF, 0xA3, 0xF5, 0xCF, 0x4A, 0x88};5 c& V" N5 m& m
uint8_t output1[32] = {0xD1, 0x2F, 0x36, 0x6C, 0x61, 0xB5, 0x66, 0x48, 0x61, 0x17, 0x8A, 0x1E, 0x6B, 0xD0, 0xE7, 0xBF, 0x66, 0x0A, 0x2B, 0x07, 0x9D, 0x4D, 0x82, 0x68, 0x7E, 0xB1, 0x9D, 0x29, 0x94, 0x43, 0x6D, 0x39}; s- c* `1 N- `; }1 r" Y
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uint8_t buffer[32];
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__IO uint32_t hal_EndOfProcess = 0;* A- h x- \5 C' ?* e6 X
__IO uint32_t hal_ErrorCallback = 0;

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计算结果与预制值得比较函数：

static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);

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在main函数里面添加：

/* Initialize all configured peripherals */8 ]0 D! Z7 q! u* l; R
MX_ICACHE_Init();
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MX_RNG_Init(); n/ H/ }4 X$ A D h/ q
MX_PKA_Init();2 r8 X* x7 X, T! [
/* USER CODE BEGIN 2 */. z5 @& W# W' B2 T5 U" d
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/* Set input parameters */
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in.OpSize = input1_OpSize;( X+ V" k" T9 A% b8 a/ \7 }
in.expSize = input1_ExpSize;5 ^& _ f s" M- q
in.pMod = input1_1;
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in.pExp = input1_2;
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in.pOp1 = input1_3;% U: L( X- k4 P+ i
in.pPhi = input1_4;
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/* Start PKA protected Modular exponentiation operation */; s+ e {6 i! \) X
if (HAL_PKA_ModExpProtectMode_IT(&hpka, &in) != HAL_OK)
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{
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/* HAL PKA Operation error */; p2 p0 S) w. c! _7 N! Q; k
Error_Handler();
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/* Wait until operation finish */
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while (!hal_EndOfProcess);
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hal_EndOfProcess = 0;
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/* Retrieve computation result */ v# h( E# n0 J8 R5 f
HAL_PKA_ModExp_GetResult(&hpka, buffer);3 |2 [* M( t3 Q* s$ S! z
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/* Check retrieved result with expected result */2 T r' k5 B0 s7 V/ ~$ I2 M( L
if ((Buffercmp((uint8_t*)buffer, (uint8_t*)output1, 32) != 0) || (hal_ErrorCallback == 1))5 W5 ^! k' g# X3 s* u" Z( q
{
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/* HAL PKA Operation error */% [& d+ z' K& y. t' u. e$ B
Error_Handler();
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}

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一些回调函数：

/**6 Z6 L! K: U8 R+ y- M
* @brief Process completed callback.3 x, H8 B* X$ }
* @param hpka PKA handle
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* @retval None* |% Z* `* Z9 @# d
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void HAL_PKA_OperationCpltCallback(PKA_HandleTypeDef *hpka)
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{
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hal_EndOfProcess = 1;
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/**
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* @brief Error callback.
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* @param hpka PKA handle
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* @retval None
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void HAL_PKA_ErrorCallback(PKA_HandleTypeDef *hpka)# i( U* k3 t. Y/ R
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hal_ErrorCallback = 1;
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/**! x7 d# y- N, ?( |& Z
* @brief Compares two buffers., w6 u: h7 ~! ]2 _1 I m
* @param pBuffer1, pBuffer2: buffers to be compared.
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* @param BufferLength: buffer's length) j5 h! p8 {4 T; A5 P+ H
* @retval 0 : pBuffer1 identical to pBuffer2
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* >0 : pBuffer1 differs from pBuffer2, Y1 ^3 l& P( ^/ B' k, n V+ s" K
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static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
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while (BufferLength--)
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{
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if ((*pBuffer1) != *pBuffer2)4 o/ h: i1 M* G& Z' q5 G
{
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return BufferLength;
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}
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pBuffer1++;( t6 R& S% m/ P9 c- I: q0 H
pBuffer2++;
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return 0;9 S* ~2 x2 F6 G9 ]2 u# T
}
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