1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* TLS/SSL Protocol
* Copyright (c) 2011 Martin Storsjo
* Copyright (c) 2017 sfan5 <sfan5@live.de>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "internal.h"
#include "network.h"
#include "url.h"
#include "tls.h"
#include "libavcodec/internal.h"
#include "libavutil/avutil.h"
#include "libavutil/opt.h"
#include <tls.h>
typedef struct TLSContext {
const AVClass *class;
TLSShared tls_shared;
struct tls *ctx;
} TLSContext;
static int ff_tls_close(URLContext *h)
{
TLSContext *p = h->priv_data;
if (p->ctx) {
tls_close(p->ctx);
tls_free(p->ctx);
}
ffurl_closep(&p->tls_shared.tcp);
return 0;
}
static ssize_t tls_read_callback(struct tls *ctx, void *buf, size_t buflen, void *cb_arg)
{
URLContext *h = (URLContext*) cb_arg;
int ret = ffurl_read(h, buf, buflen);
if (ret == AVERROR(EAGAIN))
return TLS_WANT_POLLIN;
else if (ret == AVERROR_EXIT)
return 0;
return ret >= 0 ? ret : -1;
}
static ssize_t tls_write_callback(struct tls *ctx, const void *buf, size_t buflen, void *cb_arg)
{
URLContext *h = (URLContext*) cb_arg;
int ret = ffurl_write(h, buf, buflen);
if (ret == AVERROR(EAGAIN))
return TLS_WANT_POLLOUT;
else if (ret == AVERROR_EXIT)
return 0;
return ret >= 0 ? ret : -1;
}
static int ff_tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
{
TLSContext *p = h->priv_data;
TLSShared *c = &p->tls_shared;
struct tls_config *cfg = NULL;
int ret;
if (tls_init() == -1) {
ret = AVERROR(EIO);
goto fail;
}
if ((ret = ff_tls_open_underlying(c, h, uri, options)) < 0)
goto fail;
p->ctx = !c->listen ? tls_client() : tls_server();
if (!p->ctx) {
ret = AVERROR(EIO);
goto fail;
}
cfg = tls_config_new();
if (!p->ctx) {
ret = AVERROR(EIO);
goto fail;
}
if (tls_config_set_protocols(cfg, TLS_PROTOCOLS_ALL) == -1)
goto err_config;
// While TLSv1.0 and TLSv1.1 are already enabled by the above,
// we need to be less strict with ciphers so it works in practice.
if (tls_config_set_ciphers(cfg, "compat") == -1)
goto err_config;
if (c->ca_file && tls_config_set_ca_file(cfg, c->ca_file) == -1)
goto err_config;
if (c->cert_file && tls_config_set_cert_file(cfg, c->cert_file) == -1)
goto err_config;
if (c->key_file && tls_config_set_key_file(cfg, c->key_file) == -1)
goto err_config;
if (!c->verify) {
tls_config_insecure_noverifycert(cfg);
tls_config_insecure_noverifyname(cfg);
tls_config_insecure_noverifytime(cfg);
}
if (tls_configure(p->ctx, cfg) == -1)
goto err_ctx;
if (!c->listen) {
ret = tls_connect_cbs(p->ctx, tls_read_callback, tls_write_callback,
c->tcp, c->host);
} else {
struct tls *ctx_new;
ret = tls_accept_cbs(p->ctx, &ctx_new, tls_read_callback,
tls_write_callback, c->tcp);
if (ret == 0) {
// free "server" context and replace by "connection" context
tls_free(p->ctx);
p->ctx = ctx_new;
}
}
if (ret == -1)
goto err_ctx;
tls_config_free(cfg);
return 0;
err_config:
av_log(h, AV_LOG_ERROR, "%s\n", tls_config_error(cfg));
ret = AVERROR(EIO);
goto fail;
err_ctx:
av_log(h, AV_LOG_ERROR, "%s\n", tls_error(p->ctx));
ret = AVERROR(EIO);
/* fallthrough */
fail:
if (cfg)
tls_config_free(cfg);
ff_tls_close(h);
return ret;
}
static int ff_tls_read(URLContext *h, uint8_t *buf, int size)
{
TLSContext *p = h->priv_data;
ssize_t ret;
ret = tls_read(p->ctx, buf, size);
if (ret > 0)
return ret;
else if (ret == 0)
return AVERROR_EOF;
av_log(h, AV_LOG_ERROR, "%s\n", tls_error(p->ctx));
return AVERROR(EIO);
}
static int ff_tls_write(URLContext *h, const uint8_t *buf, int size)
{
TLSContext *p = h->priv_data;
ssize_t ret;
ret = tls_write(p->ctx, buf, size);
if (ret > 0)
return ret;
else if (ret == 0)
return AVERROR_EOF;
av_log(h, AV_LOG_ERROR, "%s\n", tls_error(p->ctx));
return AVERROR(EIO);
}
static int tls_get_file_handle(URLContext *h)
{
TLSContext *c = h->priv_data;
return ffurl_get_file_handle(c->tls_shared.tcp);
}
static const AVOption options[] = {
TLS_COMMON_OPTIONS(TLSContext, tls_shared),
{ NULL }
};
static const AVClass tls_class = {
.class_name = "tls",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const URLProtocol ff_tls_protocol = {
.name = "tls",
.url_open2 = ff_tls_open,
.url_read = ff_tls_read,
.url_write = ff_tls_write,
.url_close = ff_tls_close,
.url_get_file_handle = tls_get_file_handle,
.priv_data_size = sizeof(TLSContext),
.flags = URL_PROTOCOL_FLAG_NETWORK,
.priv_data_class = &tls_class,
};
|
