使用C语言调用gmssl库进行SSL加密通信

要使用C语言调用gmssl库进行SSL加密通信，首先需要安装gmssl库。在Ubuntu系统中，可以使用以下命令安装：

```bash

sudo apt-get install libgmssl-dev

```

接下来，我们需要包含头文件并链接gmssl库。在C文件中添加以下代码：

```c

#include

```

然后，我们可以编写一个函数来生成RSA密钥对和证书：

```c

void generate_key_pair(EVP_KEY *key, EVP_MD *md) {

int i;

unsigned char key_buf[4096];

unsigned char md_buf[32];

unsigned char rsa_pub_key[4096];

unsigned char rsa_priv_key[4096];

// 初始化公钥、私钥、消息摘要和随机数生成器

EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new();

EVP_PKEY *pub_key = EVP_PKEY_new();

EVP_PKEY *priv_key = EVP_PKEY_new();

EVP_MD *md = EVP_MD_new();

EVP_DigestInit_ex(md, md_buf, sizeof(md_buf));

EVP_DigestUpdate(md, (unsigned char *)"Hello, world!", strlen("Hello, world!"));

EVP_DigestFinal_ex(md, rsa_pub_key, sizeof(rsa_pub_key));

EVP_PKEY_set1_RSA(pub_key, rsa_pub_key);

EVP_PKEY_set1_RSA(priv_key, rsa_priv_key);

EVP_MD_init_ex(md, NULL, NULL);

EVP_PKEY_CTX_set1_RSA(ctx, pub_key, priv_key);

// 生成密钥对

EVP_PKEY_do_generate_keys(ctx, &key, &pub_key, &priv_key);

}

```

接下来，我们可以创建一个SSL上下文，并设置服务器的证书和密钥：

```c

int main() {

EVP_MD *md = EVP_MD_new();

EVP_PKEY *private_key = EVP_PKEY_new();

EVP_PKEY *public_key = EVP_PKEY_new();

EVP_PKEY *server_cert = EVP_PKEY_new();

EVP_PKEY *client_cert = EVP_PKEY_new();

EVP_PKEY *client_key = EVP_PKEY_new();

EVP_PKEY *server_key = EVP_PKEY_new();

EVP_PKEY *server_certificate = EVP_PKEY_new();

EVP_PKEY *client_certificate = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_public_key_enc_enc = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

使用C语言调用gmssl库进行SSL加密通信

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVP_PKEY_new();

EVP_PKEY *client_private_key = EVP_PKEY_new();

EVP_PKEY *client_public_key = EVPgssl::RSAPublicKey((const unsigned char *)"example.com", 1024);

EVPgssl::RSAPrivateKey((const unsigned char *)"example.com", 1024);

EVPgssl::RSG2PrivateKey((const unsigned char *)"example.com", 1024);

EVVpnContext context;

context.init(context.new(), server, "example.com", "example.com");

context.setServerCertificate(server, "example.com");

context.setClientCertificate(client, "example.com");