硬件加密中实现DES / 3DES功能

本篇总结

使用硬件加密引擎，实现 DES/3DES 的 ECB/CBC 模式加解密，串口打印测试通过结果。

硬件平台：本例程基于 W55MH32L-EVB 开发板运行。

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操作流程

初始化加密引擎 → 选择算法（DES/3DES）与块模式（ECB/CBC）→ 配置密钥及 IV（CBC 需要）→ 按 64 位（8 字节）分块输入数据 → 引擎输出加/解密结果。

#include "debug.h"
#include "w55mh32.h"
#include "wiz_des.h"
#include "wiz_rand.h"
#include <stdio.h>
#include <string.h>

/* 将所有变量传入 callDes 结构体 */
callDes.pu8In     = au8Plain;                 // 输入数据
callDes.u32InLen  = DES_TEST_LEN;             // 输入长度（8 字节倍数）
callDes.pu8Out    = au8Result;                // 输出数据
callDes.u32OutLen = DES_TEST_LEN;             // 输出长度
callDes.u16Opt    = WIZ_DES_OPT_BLK_ECB | WIZ_DES_OPT_MODE_ENCRYPT;  // ECB 加密
callDes.pu8Key    = au8Key;                   // 密钥
callDes.u32Crc    = WIZCRC_CalcBuff(0xffff, &callDes, sizeof(WIZ_SYM_CRYPT_CALL) - 4);
WIZDES_EncDec(&callDes);                     // 运行硬件 DES

/* CBC 解密需额外配置 IV */
callDes.pu8IV  = au8Iv;
callDes.u16Opt = WIZ_DES_OPT_BLK_CBC | WIZ_DES_OPT_MODE_DECRYPT;

/* 3DES 加密（ECB，3 组密钥）*/
callTdes.u16Opt = WIZ_DES_OPT_BLK_ECB | WIZ_DES_OPT_MODE_ENCRYPT | WIZ_TDES_OPT_KEY_3;

如果你想自定义

• 切换 ECB / CBC → 修改 u16Opt 的块模式位：WIZ_DES_OPT_BLK_ECB 或 WIZ_DES_OPT_BLK_CBC
• 切换加密 / 解密 → 修改模式位：WIZ_DES_OPT_MODE_ENCRYPT 或 WIZ_DES_OPT_MODE_DECRYPT
• 3DES 密钥组数 → 通过 WIZ_TDES_OPT_KEY_3 选择 3 组密钥（24 字节）

#define DES_TEST_LEN (64)

void DES_Func_Test()
{
    uint8_t au8Plain[DES_TEST_LEN] = {0x01, 0x02, ..., 0x40};
    uint8_t au8DESCipher_ECB[DES_TEST_LEN] = {0x77, 0xA7, ..., 0x04};
    uint8_t au8DESCipher_CBC[DES_TEST_LEN] = {0xB0, 0x73, ..., 0xD5};
    uint8_t au8Result[DES_TEST_LEN] = {0};
    uint8_t au8Iv[8]  = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
    uint8_t au8Key[8] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
    WIZ_SYM_CRYPT_CALL callDes;

    memset(&callDes, 0, sizeof(callDes));

    // ECB ENC
    callDes.pu8In    = au8Plain;
    callDes.u32InLen = DES_TEST_LEN;
    callDes.pu8Out   = au8Result;
    callDes.u32OutLen= DES_TEST_LEN;
    callDes.u16Opt   = WIZ_DES_OPT_BLK_ECB | WIZ_DES_OPT_MODE_ENCRYPT;
    callDes.pu8Key   = au8Key;
    callDes.u32Crc   = WIZCRC_CalcBuff(0xffff, &callDes, sizeof(WIZ_SYM_CRYPT_CALL) - 4);
    WIZDES_EncDec(&callDes);
    r_printf((0 == memcmp(au8DESCipher_ECB, au8Result, DES_TEST_LEN)), "wiz_des_ecb test\n");

    // CBC DEC
    callDes.pu8In    = au8DESCipher_CBC;
    callDes.u32InLen = DES_TEST_LEN;
    callDes.pu8Out   = au8Result;
    callDes.u32OutLen= DES_TEST_LEN;
    callDes.pu8IV    = au8Iv;
    callDes.u16Opt   = WIZ_DES_OPT_BLK_CBC | WIZ_DES_OPT_MODE_DECRYPT;
    callDes.pu8Key   = au8Key;
    callDes.u32Crc   = WIZCRC_CalcBuff(0xffff, &callDes, sizeof(WIZ_SYM_CRYPT_CALL) - 4);
    WIZDES_EncDec(&callDes);
    r_printf((0 == memcmp(au8Plain, au8Result, DES_TEST_LEN)), "wiz_des_cbc test\n");
}

void DES_Test() { DES_Func_Test(); }

void TDES_Func_Test()
{
    uint8_t au8Plain[DES_TEST_LEN] = {0x01, 0x02, ..., 0x40};
    uint8_t au8TDESCipher_ECB[DES_TEST_LEN] = {0x7D, 0x78, ..., 0xD2};
    uint8_t au8TDESCipher_CBC[DES_TEST_LEN] = {0xAD, 0x17, ..., 0xD4};
    uint8_t au8Result[DES_TEST_LEN] = {0};
    uint8_t au8Key[24] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
                          0x09, 0x0A, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
                          0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
    uint8_t au8Iv[8] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
    WIZ_SYM_CRYPT_CALL callTdes;

    memset(&callTdes, 0, sizeof(callTdes));

    // ECB ENC
    callTdes.pu8In    = au8Plain;
    callTdes.u32InLen = DES_TEST_LEN;
    callTdes.pu8Out   = au8Result;
    callTdes.u32OutLen= DES_TEST_LEN;
    callTdes.u16Opt   = WIZ_DES_OPT_BLK_ECB | WIZ_DES_OPT_MODE_ENCRYPT | WIZ_TDES_OPT_KEY_3;
    callTdes.pu8Key   = au8Key;
    callTdes.u32Crc   = WIZCRC_CalcBuff(0xffff, &callTdes, sizeof(WIZ_SYM_CRYPT_CALL) - 4);
    WIZTDES_EncDec(&callTdes);
    r_printf((0 == memcmp(au8TDESCipher_ECB, au8Result, DES_TEST_LEN)), "wiz_tdes_ecb test\n");

    // CBC DEC
    callTdes.pu8In    = au8TDESCipher_CBC;
    callTdes.u32InLen = DES_TEST_LEN;
    callTdes.pu8Out   = au8Result;
    callTdes.u32OutLen= DES_TEST_LEN;
    callTdes.pu8IV    = au8Iv;
    callTdes.u16Opt   = WIZ_DES_OPT_BLK_CBC | WIZ_DES_OPT_MODE_DECRYPT | WIZ_TDES_OPT_KEY_3;
    callTdes.pu8Key   = au8Key;
    callTdes.u32Crc   = WIZCRC_CalcBuff(0xffff, &callTdes, sizeof(WIZ_SYM_CRYPT_CALL) - 4);
    WIZTDES_EncDec(&callTdes);
    r_printf((0 == memcmp(au8Plain, au8Result, DES_TEST_LEN)), "wiz_tdes_cbc test\n");
}

void TDES_Test() { TDES_Func_Test(); }

void main(int args)
{
    uint32_t ver = 1;
    RCC_ClocksTypeDef clocks;

    RCC_DeInit();
    RCC_HSEConfig(RCC_HSE_ON);
    RCC_WaitForHSEStartUp();

    RCC_PLLCmd(DISABLE);
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);  // 8MHz × 9 = 72MHz
    RCC_PLLCmd(ENABLE);
    while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
    RCC_HCLKConfig(RCC_SYSCLK_Div1);
    RCC_PCLK1Config(RCC_HCLK_Div2);
    RCC_PCLK2Config(RCC_HCLK_Div1);

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
    SysTick->CTRL |= 0x04;

    /* 使能加密引擎时钟/配置寄存器 */
    *(uint32_t *)(0x400210F0) = 0x01;
    *(uint32_t *)(0x40016C00) = 0xCDED3526;
    *(uint32_t *)(0x40016CCC) = 0x07;

    UART_Configuration(115200);
    WIZRAND_Init((uint32_t *)&u8RngBuff, sizeof(u8RngBuff));

    ver = wiz_crypt_version();
    DBG_PRINT("WIZnet CARD Secure Test Demo V1.0, secure lib version is V%02x.%02x.%02x.%02x\n",
              ver >> 24, (ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF);
    DBG_PRINT("WIZnet CARD Crypt Test V1.0 start......\r\n");

    DES_Test();
    TDES_Test();

    // AES_Test();
    // SHA_Test();
    // SM1_Test();
    // SM3_Test();
    // SM4_Test();
    // SM7_Test();

    DBG_PRINT("DES/3DES test finished, program halted.\r\n");

    while (1) {}
}