3 * Copyright (c) 2011 Martin Storsjo
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/avstring.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/parseutils.h"
28 #include <gnutls/gnutls.h>
29 #include <gnutls/x509.h>
30 #define TLS_read(c, buf, size) gnutls_record_recv(c->session, buf, size)
31 #define TLS_write(c, buf, size) gnutls_record_send(c->session, buf, size)
32 #define TLS_shutdown(c) gnutls_bye(c->session, GNUTLS_SHUT_RDWR)
33 #define TLS_free(c) do { \
35 gnutls_deinit(c->session); \
37 gnutls_certificate_free_credentials(c->cred); \
40 #include <openssl/bio.h>
41 #include <openssl/ssl.h>
42 #include <openssl/err.h>
43 #define TLS_read(c, buf, size) SSL_read(c->ssl, buf, size)
44 #define TLS_write(c, buf, size) SSL_write(c->ssl, buf, size)
45 #define TLS_shutdown(c) SSL_shutdown(c->ssl)
46 #define TLS_free(c) do { \
50 SSL_CTX_free(c->ctx); \
54 #include "os_support.h"
64 gnutls_session_t session;
65 gnutls_certificate_credentials_t cred;
78 #define OFFSET(x) offsetof(TLSContext, x)
79 #define D AV_OPT_FLAG_DECODING_PARAM
80 #define E AV_OPT_FLAG_ENCODING_PARAM
81 static const AVOption options[] = {
82 {"ca_file", "Certificate Authority database file", OFFSET(ca_file), AV_OPT_TYPE_STRING, .flags = D|E },
83 {"tls_verify", "Verify the peer certificate", OFFSET(verify), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
84 {"cert_file", "Certificate file", OFFSET(cert_file), AV_OPT_TYPE_STRING, .flags = D|E },
85 {"key_file", "Private key file", OFFSET(key_file), AV_OPT_TYPE_STRING, .flags = D|E },
86 {"listen", "Listen for incoming connections", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
90 static const AVClass tls_class = {
92 .item_name = av_default_item_name,
94 .version = LIBAVUTIL_VERSION_INT,
97 static int do_tls_poll(URLContext *h, int ret)
99 TLSContext *c = h->priv_data;
100 struct pollfd p = { c->fd, 0, 0 };
104 case GNUTLS_E_INTERRUPTED:
106 case GNUTLS_E_WARNING_ALERT_RECEIVED:
107 av_log(h, AV_LOG_WARNING, "%s\n", gnutls_strerror(ret));
110 av_log(h, AV_LOG_ERROR, "%s\n", gnutls_strerror(ret));
113 if (gnutls_record_get_direction(c->session))
118 ret = SSL_get_error(c->ssl, ret);
119 if (ret == SSL_ERROR_WANT_READ) {
121 } else if (ret == SSL_ERROR_WANT_WRITE) {
124 av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
128 if (h->flags & AVIO_FLAG_NONBLOCK)
129 return AVERROR(EAGAIN);
131 int n = poll(&p, 1, 100);
134 if (ff_check_interrupt(&h->interrupt_callback))
135 return AVERROR(EINTR);
140 static int tls_open(URLContext *h, const char *uri, int flags)
142 TLSContext *c = h->priv_data;
145 char buf[200], host[200], opts[50] = "";
147 struct addrinfo hints = { 0 }, *ai = NULL;
148 const char *proxy_path;
154 snprintf(opts, sizeof(opts), "?listen=1");
156 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, uri);
157 ff_url_join(buf, sizeof(buf), "tcp", NULL, host, port, "%s", opts);
159 hints.ai_flags = AI_NUMERICHOST;
160 if (!getaddrinfo(host, NULL, &hints, &ai)) {
165 proxy_path = getenv("http_proxy");
166 use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), host) &&
167 proxy_path != NULL && av_strstart(proxy_path, "http://", NULL);
170 char proxy_host[200], proxy_auth[200], dest[200];
172 av_url_split(NULL, 0, proxy_auth, sizeof(proxy_auth),
173 proxy_host, sizeof(proxy_host), &proxy_port, NULL, 0,
175 ff_url_join(dest, sizeof(dest), NULL, NULL, host, port, NULL);
176 ff_url_join(buf, sizeof(buf), "httpproxy", proxy_auth, proxy_host,
177 proxy_port, "/%s", dest);
180 ret = ffurl_open(&c->tcp, buf, AVIO_FLAG_READ_WRITE,
181 &h->interrupt_callback, NULL);
184 c->fd = ffurl_get_file_handle(c->tcp);
187 gnutls_init(&c->session, c->listen ? GNUTLS_SERVER : GNUTLS_CLIENT);
188 if (!c->listen && !numerichost)
189 gnutls_server_name_set(c->session, GNUTLS_NAME_DNS, host, strlen(host));
190 gnutls_certificate_allocate_credentials(&c->cred);
192 gnutls_certificate_set_x509_trust_file(c->cred, c->ca_file, GNUTLS_X509_FMT_PEM);
193 #if GNUTLS_VERSION_MAJOR >= 3
195 gnutls_certificate_set_x509_system_trust(c->cred);
197 gnutls_certificate_set_verify_flags(c->cred, c->verify ?
198 GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT : 0);
199 if (c->cert_file && c->key_file) {
200 ret = gnutls_certificate_set_x509_key_file(c->cred,
201 c->cert_file, c->key_file,
202 GNUTLS_X509_FMT_PEM);
204 av_log(h, AV_LOG_ERROR,
205 "Unable to set cert/key files %s and %s: %s\n",
206 c->cert_file, c->key_file, gnutls_strerror(ret));
211 gnutls_credentials_set(c->session, GNUTLS_CRD_CERTIFICATE, c->cred);
212 gnutls_transport_set_ptr(c->session, (gnutls_transport_ptr_t)
214 gnutls_priority_set_direct(c->session, "NORMAL", NULL);
216 ret = gnutls_handshake(c->session);
219 if ((ret = do_tls_poll(h, ret)) < 0)
223 unsigned int status, cert_list_size;
224 gnutls_x509_crt_t cert;
225 const gnutls_datum_t *cert_list;
226 if ((ret = gnutls_certificate_verify_peers2(c->session, &status)) < 0) {
227 av_log(h, AV_LOG_ERROR, "Unable to verify peer certificate: %s\n",
228 gnutls_strerror(ret));
232 if (status & GNUTLS_CERT_INVALID) {
233 av_log(h, AV_LOG_ERROR, "Peer certificate failed verification\n");
237 if (gnutls_certificate_type_get(c->session) != GNUTLS_CRT_X509) {
238 av_log(h, AV_LOG_ERROR, "Unsupported certificate type\n");
242 gnutls_x509_crt_init(&cert);
243 cert_list = gnutls_certificate_get_peers(c->session, &cert_list_size);
244 gnutls_x509_crt_import(cert, cert_list, GNUTLS_X509_FMT_DER);
245 ret = gnutls_x509_crt_check_hostname(cert, host);
246 gnutls_x509_crt_deinit(cert);
248 av_log(h, AV_LOG_ERROR,
249 "The certificate's owner does not match hostname %s\n", host);
255 c->ctx = SSL_CTX_new(c->listen ? TLSv1_server_method() : TLSv1_client_method());
257 av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
262 SSL_CTX_load_verify_locations(c->ctx, c->ca_file, NULL);
263 if (c->cert_file && !SSL_CTX_use_certificate_chain_file(c->ctx, c->cert_file)) {
264 av_log(h, AV_LOG_ERROR, "Unable to load cert file %s: %s\n",
265 c->cert_file, ERR_error_string(ERR_get_error(), NULL));
269 if (c->key_file && !SSL_CTX_use_PrivateKey_file(c->ctx, c->key_file, SSL_FILETYPE_PEM)) {
270 av_log(h, AV_LOG_ERROR, "Unable to load key file %s: %s\n",
271 c->key_file, ERR_error_string(ERR_get_error(), NULL));
275 // Note, this doesn't check that the peer certificate actually matches
276 // the requested hostname.
278 SSL_CTX_set_verify(c->ctx, SSL_VERIFY_PEER, NULL);
279 c->ssl = SSL_new(c->ctx);
281 av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
285 SSL_set_fd(c->ssl, c->fd);
286 if (!c->listen && !numerichost)
287 SSL_set_tlsext_host_name(c->ssl, host);
289 ret = c->listen ? SSL_accept(c->ssl) : SSL_connect(c->ssl);
293 av_log(h, AV_LOG_ERROR, "Unable to negotiate TLS/SSL session\n");
297 if ((ret = do_tls_poll(h, ret)) < 0)
310 static int tls_read(URLContext *h, uint8_t *buf, int size)
312 TLSContext *c = h->priv_data;
314 int ret = TLS_read(c, buf, size);
319 if ((ret = do_tls_poll(h, ret)) < 0)
325 static int tls_write(URLContext *h, const uint8_t *buf, int size)
327 TLSContext *c = h->priv_data;
329 int ret = TLS_write(c, buf, size);
334 if ((ret = do_tls_poll(h, ret)) < 0)
340 static int tls_close(URLContext *h)
342 TLSContext *c = h->priv_data;
350 URLProtocol ff_tls_protocol = {
352 .url_open = tls_open,
353 .url_read = tls_read,
354 .url_write = tls_write,
355 .url_close = tls_close,
356 .priv_data_size = sizeof(TLSContext),
357 .flags = URL_PROTOCOL_FLAG_NETWORK,
358 .priv_data_class = &tls_class,