2 * Copyright (C) 2011 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include <sys/socket.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26 #include <gnutls/gnutls.h>
31 static void * get_creds(char *certfile, char *keyfile)
33 static gnutls_certificate_credentials_t cred;
34 gnutls_dh_params_t dh_params;
35 gnutls_dh_params_init(&dh_params);
36 gnutls_dh_params_generate2(dh_params, DH_BITS);
37 gnutls_certificate_allocate_credentials(&cred);
38 gnutls_certificate_set_x509_key_file(cred, certfile, keyfile,
40 gnutls_certificate_set_dh_params(cred, dh_params);
44 static void session_new(gnutls_session_t *session)
47 cred = get_creds("cert.pem", "key.pem");
48 gnutls_init(session, GNUTLS_SERVER);
49 gnutls_set_default_priority(*session);
50 gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE, cred);
51 gnutls_dh_set_prime_bits(*session, DH_BITS);
55 static int buildRecord(char *buffer, size_t len, char **out, size_t *olen)
60 (*out)[1] = (len >> 8);
61 (*out)[2] = (len & 0xff);
63 memcpy(*out + 4, buffer, len);
67 static int deflateRecord(char *buffer, size_t len, char **out, size_t *olen)
71 zstrm.zalloc = Z_NULL;
73 zstrm.opaque = Z_NULL;
74 if ((r = deflateInit(&zstrm, Z_DEFAULT_COMPRESSION)) != Z_OK)
76 *out = malloc(len * 2 + 36);
81 zstrm.next_in = buffer;
83 zstrm.next_out = *out + 6;
84 zstrm.avail_out = len * 2 + 30;
85 while ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
87 if ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END) {
92 *olen = zstrm.avail_out + 6;
94 (*out)[1] = (zstrm.avail_out >> 8);
95 (*out)[2] = (zstrm.avail_out & 0xff);
96 (*out)[3] = (len >> 8);
97 (*out)[4] = (len & 0xff);
104 static char *response;
105 static char *def_response;
107 int main(int argc, char **argv)
110 struct sockaddr_in saddr;
118 gnutls_session_t session;
119 gnutls_global_init();
120 session_new(&session);
121 s = socket(PF_INET, SOCK_STREAM, 0);
122 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
123 saddr.sin_family = AF_INET;
124 saddr.sin_port = htons(3456);
125 saddr.sin_addr.s_addr = htonl(INADDR_ANY);
126 bind(s, (struct sockaddr *) &saddr, sizeof(saddr));
128 c = accept(s, NULL, NULL);
130 gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) c);
131 r = read(c, buffer, 1);
132 if (r == 1 && buffer[0] == 1)
134 r = read(c, buffer, 14);
135 if (r == 14 && !memcmp(buffer, "00000000000000", 14))
136 write(c, "08082013225300", 14);
137 if ((r = gnutls_handshake(session)) < 0)
138 fprintf(stderr, "error in handshake: %s\n",
141 fprintf(stderr, "handshake ok\n");
142 while ((r = gnutls_record_recv(session, buffer, sizeof(buffer))) > 0) {
147 resp_size = resp(&response);
148 buildRecord(response, resp_size, &def_response, &def_resp_size);
149 gnutls_record_send(session, def_response, def_resp_size);
153 gnutls_global_deinit();