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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* TLS/SSL Protocol
* Copyright (c) 2011 Martin Storsjo
*
* 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 "os_support.h"
#include "url.h"
#include "tls.h"
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
typedef struct TLSContext {
const AVClass *class;
TLSShared tls_shared;
SSL_CTX *ctx;
SSL *ssl;
} TLSContext;
static int print_tls_error(URLContext *h, int ret)
{
av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
return AVERROR(EIO);
}
static int tls_close(URLContext *h)
{
TLSContext *c = h->priv_data;
if (c->ssl) {
SSL_shutdown(c->ssl);
SSL_free(c->ssl);
}
if (c->ctx)
SSL_CTX_free(c->ctx);
if (c->tls_shared.tcp)
ffurl_close(c->tls_shared.tcp);
ff_tls_deinit();
return 0;
}
static int url_bio_create(BIO *b)
{
b->init = 1;
b->ptr = NULL;
b->flags = 0;
return 1;
}
static int url_bio_destroy(BIO *b)
{
return 1;
}
static int url_bio_bread(BIO *b, char *buf, int len)
{
URLContext *h = b->ptr;
int ret = ffurl_read(h, buf, len);
if (ret >= 0)
return ret;
BIO_clear_retry_flags(b);
if (ret == AVERROR_EXIT)
return 0;
return -1;
}
static int url_bio_bwrite(BIO *b, const char *buf, int len)
{
URLContext *h = b->ptr;
int ret = ffurl_write(h, buf, len);
if (ret >= 0)
return ret;
BIO_clear_retry_flags(b);
if (ret == AVERROR_EXIT)
return 0;
return -1;
}
static long url_bio_ctrl(BIO *b, int cmd, long num, void *ptr)
{
if (cmd == BIO_CTRL_FLUSH) {
BIO_clear_retry_flags(b);
return 1;
}
return 0;
}
static int url_bio_bputs(BIO *b, const char *str)
{
return url_bio_bwrite(b, str, strlen(str));
}
static BIO_METHOD url_bio_method = {
.type = BIO_TYPE_SOURCE_SINK,
.name = "urlprotocol bio",
.bwrite = url_bio_bwrite,
.bread = url_bio_bread,
.bputs = url_bio_bputs,
.bgets = NULL,
.ctrl = url_bio_ctrl,
.create = url_bio_create,
.destroy = url_bio_destroy,
};
static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
{
TLSContext *p = h->priv_data;
TLSShared *c = &p->tls_shared;
BIO *bio;
int ret;
if ((ret = ff_tls_init()) < 0)
return ret;
if ((ret = ff_tls_open_underlying(c, h, uri, options)) < 0)
goto fail;
p->ctx = SSL_CTX_new(c->listen ? TLSv1_server_method() : TLSv1_client_method());
if (!p->ctx) {
av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
ret = AVERROR(EIO);
goto fail;
}
if (c->ca_file) {
if (!SSL_CTX_load_verify_locations(p->ctx, c->ca_file, NULL))
av_log(h, AV_LOG_ERROR, "SSL_CTX_load_verify_locations %s\n", ERR_error_string(ERR_get_error(), NULL));
}
if (c->cert_file && !SSL_CTX_use_certificate_chain_file(p->ctx, c->cert_file)) {
av_log(h, AV_LOG_ERROR, "Unable to load cert file %s: %s\n",
c->cert_file, ERR_error_string(ERR_get_error(), NULL));
ret = AVERROR(EIO);
goto fail;
}
if (c->key_file && !SSL_CTX_use_PrivateKey_file(p->ctx, c->key_file, SSL_FILETYPE_PEM)) {
av_log(h, AV_LOG_ERROR, "Unable to load key file %s: %s\n",
c->key_file, ERR_error_string(ERR_get_error(), NULL));
ret = AVERROR(EIO);
goto fail;
}
// Note, this doesn't check that the peer certificate actually matches
// the requested hostname.
if (c->verify)
SSL_CTX_set_verify(p->ctx, SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL);
p->ssl = SSL_new(p->ctx);
if (!p->ssl) {
av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
ret = AVERROR(EIO);
goto fail;
}
bio = BIO_new(&url_bio_method);
bio->ptr = c->tcp;
SSL_set_bio(p->ssl, bio, bio);
if (!c->listen && !c->numerichost)
SSL_set_tlsext_host_name(p->ssl, c->host);
ret = c->listen ? SSL_accept(p->ssl) : SSL_connect(p->ssl);
if (ret == 0) {
av_log(h, AV_LOG_ERROR, "Unable to negotiate TLS/SSL session\n");
ret = AVERROR(EIO);
goto fail;
} else if (ret < 0) {
ret = print_tls_error(h, ret);
goto fail;
}
return 0;
fail:
tls_close(h);
return ret;
}
static int tls_read(URLContext *h, uint8_t *buf, int size)
{
TLSContext *c = h->priv_data;
int ret = SSL_read(c->ssl, buf, size);
if (ret > 0)
return ret;
if (ret == 0)
return AVERROR_EOF;
return print_tls_error(h, ret);
}
static int tls_write(URLContext *h, const uint8_t *buf, int size)
{
TLSContext *c = h->priv_data;
int ret = SSL_write(c->ssl, buf, size);
if (ret > 0)
return ret;
if (ret == 0)
return AVERROR_EOF;
return print_tls_error(h, ret);
}
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,
};
URLProtocol ff_tls_openssl_protocol = {
.name = "tls",
.url_open2 = tls_open,
.url_read = tls_read,
.url_write = tls_write,
.url_close = tls_close,
.priv_data_size = sizeof(TLSContext),
.flags = URL_PROTOCOL_FLAG_NETWORK,
.priv_data_class = &tls_class,
};
|
