# 基于go封装国密C可访问库

**Repository Path**: state-secret-series/go-gmsm

## Basic Information

- **Project Name**: 基于go封装国密C可访问库
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-07-03
- **Last Updated**: 2024-07-04

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# go-gmsm cgo库

#### 介绍
基于github.com/emmansun/gmsm库编写的SM2对C
开放的库

特性：非对称加密、不支持跨平台编译

git地址：https://gitee.com/state-secret-series/go-gmsm.git

#### 软件架构
Go、Cgo、mod

#### 安装教程
克隆仓库
```asm
git clone https://gitee.com/state-secret-series/go-gmsm.git
```
进入go-gmsm目录
```asm
cd go-gmsm
```
下载依赖
```asm
go mod tidy
```
cgo静态编译

```asm
go build -x -buildmode=c-archive -o libgosm2.a
```
编译完成后生成  libgosm2.a 、libgosm2.h 文件

#### 使用教程
在C语言中调用

```asm
int main() {
    GO_SM2_KEY_PAIR key_pair;
    GO_SM2_SIGNATURE_STRUCT sm2_sig;
    GO_SM2_ENCRYPT_STRUCT ciphertext;
    GO_SM2_DECRYPT_STRUCT plaintext;
    GO_SM2_ERROR_STRUCT  error;
    unsigned char msg[] = {"这是测试数据"};
    int msg_len = (int) (strlen((char *) msg));
    unsigned char user_id[] = {"1234567812345678"};
    int user_id_len = (int) (strlen((char *) user_id));
//    unsigned char *ciphertext = NULL;
//    int ciphertext_len=0;
    int error_code;
    error_code =  GenerateKeyPair(&key_pair,&error);
    if(error_code){
        printf("GenerateKeyPair failed!%s\n", error.error);
        return error_code;
    }
    print_hex("公钥", key_pair.pub_key, GO_SM2_PUBKEY_LEN);
    print_hex("私钥", key_pair.pri_key, GO_SM2_PRIKEY_LEN);
    GoSm2SignData(key_pair.pri_key, GO_SM2_PRIKEY_LEN, msg, msg_len, user_id, user_id_len,GO_SM2_MODE_DEFAULT, &sm2_sig,&error);
    print_hex("签名", sm2_sig.sig, sm2_sig.sig_len);

    error_code = Sm2SignVerify(key_pair.pub_key, GO_SM2_PUBKEY_LEN, msg, msg_len, user_id, user_id_len, &sm2_sig,&error);
    if (error_code) {
        printf("Verify SM2 signature failed!%d\n", error_code);
        return error_code;
    }
    printf("Verify SM2 signature succeeded!\n");
    error_code = Sm2Encrypt(key_pair.pub_key, GO_SM2_PUBKEY_LEN, msg, msg_len, GO_SM2_MODE_ANS1, GO_SM2_ORDER_C1C2C3, &ciphertext,&error);
    if (error_code) {
        printf("Sm2Encrypt SM2 Sm2Encrypt failed!%d\n", error_code);
        return error_code;
    }
    printf("Sm2Encrypt SM2 Sm2Encrypt succeeded!\n");
    print_hex("加密结果", ciphertext.ciphertext, ciphertext.ciphertext_len);
    error_code = Sm2Decrypt(key_pair.pri_key,GO_SM2_PRIKEY_LEN,ciphertext.ciphertext, ciphertext.ciphertext_len,GO_SM2_ORDER_C1C2C3,&plaintext,&error);
    if (error_code) {
        printf("Sm2Decrypt SM2 Sm2Decrypt failed!%d\n", error_code);
        return error_code;
    }
    printf("Sm2Decrypt SM2 Sm2Decrypt succeeded!\n");
    print_hex("解密结果", plaintext.plaintext, plaintext.plaintext_len);
    printf("文明:%s\n", plaintext.plaintext);
    return 0;
}
```