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4-6 学时实践要求（30 分）

1. 在 Ubuntu或openEuler中（推荐 openEuler）中调用GmSSL代码，至少实现SM2，SM3，SM4相关密码算法接口，使用Markdown记录详细记录实践过程，每完成一项功能或者一个函数git commit 一次。（10分）
2. 在 Ubuntu或openEuler中（推荐 openEuler）中调用GmSSL代码，实现SM2，SM4相关接口密钥管理功能及其他必要接口。使用Markdown记录详细记录实践过程，每完成一项功能或者一个函数git commit 一次。（10分）
3. 使用 Rust 实现相关接口（选做，10 分）
4. 实验记录中提交 gitee 课程项目链接，提交本次实验相关 git log运行结果。
5. 提交要求：

• 提交实践过程Markdown和转化的PDF文件
• 代码，文档托管到gitee或github等，推荐 gitclone
• 记录实验过程中遇到的问题，解决过程，反思等内容，用于后面实验报告
• 实验过程文档GitHub链接
  完成gmt0018中对称加密解密，非对称加密解密，签名验签，hash运算，MAC运算接口（5选1）
  接口放入sdf.h，实现内容实现sdf.c,testsdf.c

1.实践完成hash运算接口

参考代码来源

• 测试代码可用性

user@user-VirtualBox:~/shiyan/shiyan3/SoftSDF-main$ gcc -o test softsdftest.c  softsdf.c -lgmssl
user@user-VirtualBox:~/shiyan/shiyan3/SoftSDF-main$ ./test
test ok

SDF_HashInit 声明与实现（初始化哈希上下文）

• 声明

int SDF_HashInit(void *hSessionHandle,unsigned int uiAlgID,ECCrefPublicKey *pucPublicKey,unsigned char *pucID,unsigned int uiIDLength);

• 实现

int SDF_HashInit(void *hSessionHandle,unsigned int uiAlgID,ECCrefPublicKey *pucPublicKey,unsigned char *pucID,unsigned int uiIDLength)
{SOFTSDF_SESSION *session;if (deviceHandle == NULL) {error_print();return SDR_STEPERR;}if (hSessionHandle == NULL) {error_print();return SDR_INARGERR;}session = deviceHandle->session_list;while (session != NULL && session != hSessionHandle) {session = session->next;}if (session == NULL) {error_print();return SDR_INARGERR;}if (uiAlgID != SGD_SM3) {error_print();return SDR_INARGERR;}// FIXME: check step or return SDR_STEPERR;sm3_init(&session->sm3_ctx);if (pucPublicKey != NULL) {SM2_POINT point;SM2_Z256_POINT public_key;uint8_t z[32];if (pucID == NULL || uiIDLength <= 0) {error_print();return SDR_INARGERR;}memset(&point, 0, sizeof(point));memcpy(point.x, pucPublicKey->x + ECCref_MAX_LEN - 32, 32);memcpy(point.y, pucPublicKey->y + ECCref_MAX_LEN - 32, 32);if (sm2_z256_point_from_bytes(&public_key, (uint8_t *)&point) != 1) {error_print();return SDR_INARGERR;}if (sm2_compute_z(z, &public_key, (const char *)pucID, uiIDLength) != 1) {error_print();return SDR_GMSSLERR;}sm3_update(&session->sm3_ctx, z, sizeof(z));}return SDR_OK;
}

SDF_HashUpdate 声明与实现（更新哈希数据）

• 声明

int SDF_HashUpdate(void *hSessionHandle,unsigned char *pucData,unsigned int uiDataLength);

• 实现

int SDF_HashUpdate(void *hSessionHandle,unsigned char *pucData,unsigned int uiDataLength)
{SOFTSDF_SESSION *session;if (deviceHandle == NULL) {error_print();return SDR_STEPERR;}if (hSessionHandle == NULL) {error_print();return SDR_INARGERR;}session = deviceHandle->session_list;while (session != NULL && session != hSessionHandle) {session = session->next;}if (session == NULL) {error_print();return SDR_INARGERR;}if (pucData == NULL || uiDataLength <= 0) {error_print();return SDR_INARGERR;}sm3_update(&session->sm3_ctx, pucData, uiDataLength);return SDR_OK;
}

SDF_HashFinal 声明与实现（完成哈希计算并获取最终结果）

• 声明

int SDF_HashFinal(void *hSessionHandle,unsigned char *pucHash,unsigned int *puiHashLength);

• 实现

int SDF_HashFinal(void *hSessionHandle,unsigned char *pucHash,unsigned int *puiHashLength)
{SOFTSDF_SESSION *session;if (deviceHandle == NULL) {error_print();return SDR_STEPERR;}if (hSessionHandle == NULL) {error_print();return SDR_INARGERR;}session = deviceHandle->session_list;while (session != NULL && session != hSessionHandle) {session = session->next;}if (session == NULL) {error_print();return SDR_INARGERR;}if (pucHash == NULL || puiHashLength == NULL) {error_print();return SDR_INARGERR;}sm3_finish(&session->sm3_ctx, pucHash);*puiHashLength = SM3_DIGEST_SIZE;return SDR_OK;
}

测试结果

• 测试代码

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <gmssl/sm3.h>
#include "sdf.h"int main(void)
{void *hDeviceHandle = NULL;void *hSessionHandle = NULL;unsigned char ucData[3] = { 0x61, 0x62, 0x63 };unsigned int uiDataLength = (unsigned int)sizeof(ucData);unsigned char ucHash[32];unsigned int uiHashLength;int ret;SM3_CTX sm3_ctx;unsigned char dgst[32];ret = SDF_OpenDevice(&hDeviceHandle);if (ret != SDR_OK) {fprintf(stderr, "Error: SDF_OpenDevice: 0x%X\n", ret);return -1;}ret = SDF_OpenSession(hDeviceHandle, &hSessionHandle);if (ret != SDR_OK) {fprintf(stderr, "Error: SDF_OpenSession: 0x%X\n", ret);return -1;}ret = SDF_HashInit(hSessionHandle, SGD_SM3, NULL, NULL, 0);if (ret != SDR_OK) {fprintf(stderr, "Error: SDF_HashInit: 0x%X\n", ret);return -1;}ret = SDF_HashUpdate(hSessionHandle, ucData, uiDataLength);if (ret != SDR_OK) {fprintf(stderr, "Error: SDF_HashUpdate: 0x%X\n", ret);return -1;}ret = SDF_HashFinal(hSessionHandle, ucHash, &uiHashLength);if (ret != SDR_OK) {fprintf(stderr, "Error: SDF_HashFinal: 0x%X\n", ret);return -1;}SDF_CloseSession(hSessionHandle);SDF_CloseDevice(hDeviceHandle);// check with gmsslsm3_init(&sm3_ctx);sm3_update(&sm3_ctx, ucData, sizeof(ucData));sm3_finish(&sm3_ctx, dgst);if (uiHashLength != 32) {fprintf(stderr, "Error: error hash lenght\n");return -1;}if (memcmp(ucHash, dgst, 32) != 0) {fprintf(stderr, "Error: error hash value\n");return -1;}printf("test ok\n");return 0;
}

• 结果

user@user-VirtualBox:~/shiyan/shiyan3/SoftSDF-main$ ls
CMakeLists.txt  README.md  sgd.h      softsdf.exp    softsdf.lds    test
LICENSE         sdf.h      softsdf.c  softsdfinit.c  softsdftest.c
user@user-VirtualBox:~/shiyan/shiyan3/SoftSDF-main$ gcc -o test softsdftest.c  softsdf.c -lgmssl
user@user-VirtualBox:~/shiyan/shiyan3/SoftSDF-main$ ./test
test ok

• 结果说明

通过 SoftSDF 库实现的 SM3 哈希计算功能与 GMSSL 库中直接使用 SM3 算法计算得到的哈希值完全一致，从而验证了 SoftSDF 库中哈希运算相关接口（SDF_HashInit、SDF_HashUpdate、SDF_HashFinal）的正确性和可靠性。

2.实践实现MAC运算接口

SDF_CalculateMAC函数声明与实现

• 声明

int SDF_CalculateMAC(void *hSessionHandle,void *hKeyHandle,unsigned int uiAlgID,unsigned char *pucIV,unsigned char *pucData,unsigned int uiDataLength,unsigned char *pucMAC,unsigned int *puiMACLength);

• 实现

int SDF_CalculateMAC(void *hSessionHandle,void *hKeyHandle,unsigned int uiAlgID,unsigned char *pucIV,unsigned char *pucData,unsigned int uiDataLength,unsigned char *pucMAC,unsigned int *puiMACLength)
{SOFTSDF_SESSION *session;SOFTSDF_KEY *key;if (deviceHandle == NULL) {error_print();return SDR_STEPERR;}if (hSessionHandle == NULL) {error_print();return SDR_INARGERR;}session = deviceHandle->session_list;while (session != NULL && session != hSessionHandle) {session = session->next;}if (session == NULL) {error_print();return SDR_INARGERR;}if (hKeyHandle == NULL) {error_print();return SDR_INARGERR;}key = session->key_list;while (key != NULL && key != (SOFTSDF_KEY *)hKeyHandle) {key = key->next;}if (key == NULL) {error_print();return SDR_INARGERR;}if (pucIV != NULL) {error_print();return SDR_INARGERR;}if (pucData == NULL || uiDataLength <= 0) {error_print();return SDR_INARGERR;}if (puiMACLength == NULL) {error_print();return SDR_INARGERR;}if (uiAlgID == SGD_SM3) {SM3_HMAC_CTX hmac_ctx;if (key->key_size < 12) {error_print();return SDR_INARGERR;}*puiMACLength = SM3_HMAC_SIZE;if (!pucMAC) {return SDR_OK;}sm3_hmac_init(&hmac_ctx, key->key, key->key_size);sm3_hmac_update(&hmac_ctx, pucData, uiDataLength);sm3_hmac_finish(&hmac_ctx, pucMAC);memset(&hmac_ctx, 0, sizeof(hmac_ctx));} else if (uiAlgID == SGD_SM4_MAC) {SM4_CBC_MAC_CTX cbc_mac_ctx;if (key->key_size < SM4_KEY_SIZE) {error_print();return SDR_INARGERR;}*puiMACLength = SM4_CBC_MAC_SIZE;if (!pucMAC) {return SDR_OK;}sm4_cbc_mac_init(&cbc_mac_ctx, key->key);sm4_cbc_mac_update(&cbc_mac_ctx, pucData, uiDataLength);sm4_cbc_mac_finish(&cbc_mac_ctx, pucMAC);memset(&cbc_mac_ctx, 0, sizeof(cbc_mac_ctx));} else {error_print();return SDR_INARGERR;}return SDR_OK;
}