Simple program which demonstrates libtls issue #266

libtlstest.c

#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <tls.h>

#define MSGSIZE 1024

static void
assert(BOOL condition, char * format, ...)
{
    if (!condition) {
        va_list va;
        char message[MSGSIZE];
        int len;

        va_start(va, format);
        len = vsnprintf_s(message, MSGSIZE, MSGSIZE - 1, format, va);
        fprintf(stderr, "Fatal error in launcher: %s\n", message);
        ExitProcess(1);
    }
}

int main()
{
    WSADATA data;
    int rc;
    int sock;
    struct addrinfo info;
    struct addrinfo * result = NULL;
    char * host = "bitbucket.org";
    char * port = "443";
    struct tls_config * config;
    struct tls * context;

    rc = WSAStartup(MAKEWORD(2, 2), &data);
    assert(!rc, "WSAStartup failed");

    // get connection info
    ZeroMemory(&info, sizeof(info));
    info.ai_family = AF_INET;
    info.ai_socktype = SOCK_STREAM;
    info.ai_protocol = IPPROTO_TCP;
    rc = getaddrinfo(host, port, &info, &result);
    assert(!rc, "getaddrinfo failed");

    // create socket
    sock = (int) socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    assert(sock > 0, "socket failed");

    // connect socket
    rc = connect(sock, result->ai_addr, (socklen_t) result->ai_addrlen);
    assert(!rc, "connect failed");
    freeaddrinfo(result);

    // init libtls
    rc = tls_init();
    assert(!rc, "tls_init failed");

    // get config
    config = tls_config_new();
    assert(config != NULL, "config creation failed");
    rc = tls_config_set_ca_file(config, "cert.pem");
    assert(!rc, "tls_config_set_ca_file failed: %s", tls_config_error(config));

    // get context and configure
    context = tls_client();
    assert(context != NULL, "context creation failed");
    rc = tls_configure(context, config);
    assert(!rc, "context configuration failed");

    // connect the socket to the context and do the handshake
    rc = tls_connect_socket(context, sock, host);
    assert(!rc, "tls_connect_socket failed");
    rc = tls_handshake(context);
    assert(!rc, "tls_handshake failed");

    // print some info to show we actually connected
    printf("issuer: %s\n", tls_peer_cert_issuer(context));

    // shutdown and close socket
    shutdown(sock, SD_SEND);
    closesocket(sock);

    // free up context
    rc = tls_close(context);
    assert(!rc, "tls_close failed");
    tls_free(context);

    // free up config
    tls_config_free(config);

    // last ...
    WSACleanup();
    return 0;
}