j'essaie de faire un serveur qui accepte des connexions tls.
j'ai repris le code sur cette page : https://wiki.openssl.org/index.php/Simple_TLS_Server
Code : Tout sélectionner
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
int create_socket(int port)
{
int s;
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0) {
perror("Unable to create socket");
exit(EXIT_FAILURE);
}
if (bind(s, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
perror("Unable to bind");
exit(EXIT_FAILURE);
}
if (listen(s, 1) < 0) {
perror("Unable to listen");
exit(EXIT_FAILURE);
}
return s;
}
void init_openssl()
{
SSL_load_error_strings();
OpenSSL_add_ssl_algorithms();
}
void cleanup_openssl()
{
EVP_cleanup();
}
SSL_CTX *create_context()
{
const SSL_METHOD *method;
SSL_CTX *ctx;
method = SSLv23_server_method();
ctx = SSL_CTX_new(method);
if (!ctx) {
perror("Unable to create SSL context");
ERR_print_errors_fp(stderr);
exit(EXIT_FAILURE);
}
return ctx;
}
void configure_context(SSL_CTX *ctx)
{
SSL_CTX_set_ecdh_auto(ctx, 1);
/* Set the key and cert */
if (SSL_CTX_use_certificate_file(ctx, "cert.pem", SSL_FILETYPE_PEM) <= 0) {
ERR_print_errors_fp(stderr);
exit(EXIT_FAILURE);
}
if (SSL_CTX_use_PrivateKey_file(ctx, "privkey.pem", SSL_FILETYPE_PEM) <= 0 ) {
ERR_print_errors_fp(stderr);
exit(EXIT_FAILURE);
}
}
int main(int argc, char **argv)
{
int sock;
SSL_CTX *ctx;
init_openssl();
ctx = create_context();
configure_context(ctx);
sock = create_socket(4433);
/* Handle connections */
while(1) {
struct sockaddr_in addr;
uint len = sizeof(addr);
SSL *ssl;
const char reply[] = "test\n";
int client = accept(sock, (struct sockaddr*)&addr, &len);
if (client < 0) {
perror("Unable to accept");
exit(EXIT_FAILURE);
}
ssl = SSL_new(ctx);
SSL_set_fd(ssl, client);
if (SSL_accept(ssl) <= 0) {
ERR_print_errors_fp(stderr);
}
else {
SSL_write(ssl, reply, strlen(reply));
}
SSL_shutdown(ssl);
SSL_free(ssl);
close(client);
}
close(sock);
SSL_CTX_free(ctx);
cleanup_openssl();
}
Code : Tout sélectionner
sudo certbot certonly --standalone
j'ai copié les fichiers cert.pem et privkey.pem à la racine de mon serveur (là où se trouve le main.c).
mais quand j'essaie de simuler une connexion avec curl il me retourne :
Code : Tout sélectionner
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: https://curl.haxx.se/docs/sslcerts.html
Code : Tout sélectionner
1996193792:error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca:../ssl/record/rec_layer_s3.c:1407:SSL alert number 48