2 * Copyright (C) 2012 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
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 3 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.
24 #include <sys/socket.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
27 #include <gnutls/gnutls.h>
30 static void * get_creds(char *certfile)
32 static gnutls_certificate_credentials_t cred;
33 gnutls_certificate_allocate_credentials(&cred);
34 gnutls_certificate_set_x509_trust_file(cred, certfile,
39 static void session_new(gnutls_session_t *session)
42 cred = get_creds("cert.pem");
43 gnutls_init(session, GNUTLS_CLIENT);
44 gnutls_set_default_priority(*session);
45 gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE, cred);
48 static int deflateRecord(char *buffer, size_t len, char **out, size_t *olen)
52 zstrm.zalloc = Z_NULL;
54 zstrm.opaque = Z_NULL;
55 if ((r = deflateInit(&zstrm, Z_DEFAULT_COMPRESSION)) != Z_OK)
57 *out = malloc(len * 2 + 36);
62 zstrm.next_in = buffer;
64 zstrm.next_out = *out + 6;
65 zstrm.avail_out = len * 2 + 30;
66 while ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
68 if ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END) {
73 *olen = zstrm.avail_out + 6;
75 (*out)[1] = (zstrm.avail_out >> 8);
76 (*out)[2] = (zstrm.avail_out & 0xff);
77 (*out)[3] = (len >> 8);
78 (*out)[4] = (len & 0xff);
84 static int inflateRecord(char *buffer, size_t len, char **out, size_t *olen)
88 zstrm.zalloc = Z_NULL;
90 zstrm.opaque = Z_NULL;
91 if ((r = inflateInit(&zstrm)) != Z_OK)
93 *olen = (buffer[3] << 8 & buffer[4]);
99 zstrm.next_in = buffer + 6;
100 zstrm.avail_in = len - 6;
101 zstrm.next_out = *out;
102 zstrm.avail_out = *olen;
103 while ((r = inflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
104 zstrm.avail_out > 0);
105 if ((r = inflate(&zstrm, Z_FINISH)) != Z_STREAM_END) {
114 int main(int argc, char **argv)
116 struct sockaddr_in saddr;
122 gnutls_session_t session;
123 gnutls_global_init();
124 session_new(&session);
125 c = socket(PF_INET, SOCK_STREAM, 0);
126 saddr.sin_family = AF_INET;
127 saddr.sin_port = htons(3456);
128 saddr.sin_addr.s_addr = inet_addr("161.148.185.140");
129 r = connect(c, (struct sockaddr *) &saddr, sizeof(saddr));
131 fprintf(stderr, "error connecting to server: %s\n",
135 gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) c);
138 write(c, "00000000000000", 14);
139 r = read(c, buffer, 1);
140 if (r != 1 && buffer[0] != 'E')
142 r = read(c, buffer, 14);
145 if ((r = gnutls_handshake(session)) < 0)
146 fprintf(stderr, "error in handshake: %s\n",
149 fprintf(stderr, "handshake ok\n");
150 r = read(0, buffer, sizeof(buffer));
151 deflateRecord(buffer, r, &out, &olen);
152 gnutls_record_send(session, out, olen);
154 while ((r = gnutls_record_recv(session, buffer, sizeof(buffer))) > 0)
157 gnutls_global_deinit();