avformat/mxfdec: fix last packet timestamps
[ffmpeg.git] / libavformat / tls_schannel.c
1 /*
2  * Copyright (c) 2015 Hendrik Leppkes
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /** Based on the CURL SChannel module */
22
23 #include "avformat.h"
24 #include "internal.h"
25 #include "network.h"
26 #include "os_support.h"
27 #include "url.h"
28 #include "tls.h"
29
30 #define SECURITY_WIN32
31 #include <windows.h>
32 #include <security.h>
33 #include <schnlsp.h>
34
35 #define SCHANNEL_INITIAL_BUFFER_SIZE   4096
36 #define SCHANNEL_FREE_BUFFER_SIZE      1024
37
38 /* mingw does not define this symbol */
39 #ifndef SECBUFFER_ALERT
40 #define SECBUFFER_ALERT                17
41 #endif
42
43 typedef struct TLSContext {
44     const AVClass *class;
45     TLSShared tls_shared;
46
47     CredHandle cred_handle;
48     TimeStamp cred_timestamp;
49
50     CtxtHandle ctxt_handle;
51     TimeStamp ctxt_timestamp;
52
53     ULONG request_flags;
54     ULONG context_flags;
55
56     uint8_t *enc_buf;
57     int enc_buf_size;
58     int enc_buf_offset;
59
60     uint8_t *dec_buf;
61     int dec_buf_size;
62     int dec_buf_offset;
63
64     SecPkgContext_StreamSizes sizes;
65
66     int connected;
67     int connection_closed;
68     int sspi_close_notify;
69 } TLSContext;
70
71 static void init_sec_buffer(SecBuffer *buffer, unsigned long type,
72                             void *data, unsigned long size)
73 {
74     buffer->cbBuffer   = size;
75     buffer->BufferType = type;
76     buffer->pvBuffer   = data;
77 }
78
79 static void init_sec_buffer_desc(SecBufferDesc *desc, SecBuffer *buffers,
80                                  unsigned long buffer_count)
81 {
82     desc->ulVersion = SECBUFFER_VERSION;
83     desc->pBuffers = buffers;
84     desc->cBuffers = buffer_count;
85 }
86
87 static int tls_shutdown_client(URLContext *h)
88 {
89     TLSContext *c = h->priv_data;
90     TLSShared *s = &c->tls_shared;
91     int ret;
92
93     if (c->connected) {
94         SecBufferDesc BuffDesc;
95         SecBuffer Buffer;
96         SECURITY_STATUS sspi_ret;
97         SecBuffer outbuf;
98         SecBufferDesc outbuf_desc;
99
100         DWORD dwshut = SCHANNEL_SHUTDOWN;
101         init_sec_buffer(&Buffer, SECBUFFER_TOKEN, &dwshut, sizeof(dwshut));
102         init_sec_buffer_desc(&BuffDesc, &Buffer, 1);
103
104         sspi_ret = ApplyControlToken(&c->ctxt_handle, &BuffDesc);
105         if (sspi_ret != SEC_E_OK)
106             av_log(h, AV_LOG_ERROR, "ApplyControlToken failed\n");
107
108         init_sec_buffer(&outbuf, SECBUFFER_EMPTY, NULL, 0);
109         init_sec_buffer_desc(&outbuf_desc, &outbuf, 1);
110
111         sspi_ret = InitializeSecurityContext(&c->cred_handle, &c->ctxt_handle, s->host,
112                                              c->request_flags, 0, 0, NULL, 0, &c->ctxt_handle,
113                                              &outbuf_desc, &c->context_flags, &c->ctxt_timestamp);
114         if (sspi_ret == SEC_E_OK || sspi_ret == SEC_I_CONTEXT_EXPIRED) {
115             ret = ffurl_write(s->tcp, outbuf.pvBuffer, outbuf.cbBuffer);
116             FreeContextBuffer(outbuf.pvBuffer);
117             if (ret < 0 || ret != outbuf.cbBuffer)
118                 av_log(h, AV_LOG_ERROR, "Failed to send close message\n");
119         }
120
121         c->connected = 0;
122     }
123     return 0;
124 }
125
126 static int tls_close(URLContext *h)
127 {
128     TLSContext *c = h->priv_data;
129
130     tls_shutdown_client(h);
131
132     DeleteSecurityContext(&c->ctxt_handle);
133     FreeCredentialsHandle(&c->cred_handle);
134
135     av_freep(&c->enc_buf);
136     c->enc_buf_size = c->enc_buf_offset = 0;
137
138     av_freep(&c->dec_buf);
139     c->dec_buf_size = c->dec_buf_offset = 0;
140
141     if (c->tls_shared.tcp)
142         ffurl_close(c->tls_shared.tcp);
143     return 0;
144 }
145
146 static int tls_client_handshake_loop(URLContext *h, int initial)
147 {
148     TLSContext *c = h->priv_data;
149     TLSShared *s = &c->tls_shared;
150     SECURITY_STATUS sspi_ret;
151     SecBuffer outbuf[3];
152     SecBufferDesc outbuf_desc;
153     SecBuffer inbuf[2];
154     SecBufferDesc inbuf_desc;
155     int i, ret = 0, read_data = initial;
156
157     if (c->enc_buf == NULL) {
158         c->enc_buf_offset = 0;
159         ret = av_reallocp(&c->enc_buf, SCHANNEL_INITIAL_BUFFER_SIZE);
160         if (ret < 0)
161             goto fail;
162         c->enc_buf_size = SCHANNEL_INITIAL_BUFFER_SIZE;
163     }
164
165     if (c->dec_buf == NULL) {
166         c->dec_buf_offset = 0;
167         ret = av_reallocp(&c->dec_buf, SCHANNEL_INITIAL_BUFFER_SIZE);
168         if (ret < 0)
169             goto fail;
170         c->dec_buf_size = SCHANNEL_INITIAL_BUFFER_SIZE;
171     }
172
173     while (1) {
174         if (c->enc_buf_size - c->enc_buf_offset < SCHANNEL_FREE_BUFFER_SIZE) {
175             c->enc_buf_size = c->enc_buf_offset + SCHANNEL_FREE_BUFFER_SIZE;
176             ret = av_reallocp(&c->enc_buf, c->enc_buf_size);
177             if (ret < 0) {
178                 c->enc_buf_size = c->enc_buf_offset = 0;
179                 goto fail;
180             }
181         }
182
183         if (read_data) {
184             ret = ffurl_read(c->tls_shared.tcp, c->enc_buf + c->enc_buf_offset,
185                              c->enc_buf_size - c->enc_buf_offset);
186             if (ret < 0) {
187                 av_log(h, AV_LOG_ERROR, "Failed to read handshake response\n");
188                 goto fail;
189             }
190             c->enc_buf_offset += ret;
191         }
192
193         /* input buffers */
194         init_sec_buffer(&inbuf[0], SECBUFFER_TOKEN, av_malloc(c->enc_buf_offset), c->enc_buf_offset);
195         init_sec_buffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0);
196         init_sec_buffer_desc(&inbuf_desc, inbuf, 2);
197
198         if (inbuf[0].pvBuffer == NULL) {
199             av_log(h, AV_LOG_ERROR, "Failed to allocate input buffer\n");
200             ret = AVERROR(ENOMEM);
201             goto fail;
202         }
203
204         memcpy(inbuf[0].pvBuffer, c->enc_buf, c->enc_buf_offset);
205
206         /* output buffers */
207         init_sec_buffer(&outbuf[0], SECBUFFER_TOKEN, NULL, 0);
208         init_sec_buffer(&outbuf[1], SECBUFFER_ALERT, NULL, 0);
209         init_sec_buffer(&outbuf[2], SECBUFFER_EMPTY, NULL, 0);
210         init_sec_buffer_desc(&outbuf_desc, outbuf, 3);
211
212         sspi_ret = InitializeSecurityContext(&c->cred_handle, &c->ctxt_handle, s->host, c->request_flags,
213                                              0, 0, &inbuf_desc, 0, NULL, &outbuf_desc, &c->context_flags,
214                                              &c->ctxt_timestamp);
215         av_freep(&inbuf[0].pvBuffer);
216
217         if (sspi_ret == SEC_E_INCOMPLETE_MESSAGE) {
218             av_log(h, AV_LOG_DEBUG, "Received incomplete handshake, need more data\n");
219             read_data = 1;
220             continue;
221         }
222
223         /* remote requests a client certificate - attempt to continue without one anyway */
224         if (sspi_ret == SEC_I_INCOMPLETE_CREDENTIALS &&
225             !(c->request_flags & ISC_REQ_USE_SUPPLIED_CREDS)) {
226             av_log(h, AV_LOG_VERBOSE, "Client certificate has been requested, ignoring\n");
227             c->request_flags |= ISC_REQ_USE_SUPPLIED_CREDS;
228             read_data = 0;
229             continue;
230         }
231
232         /* continue handshake */
233         if (sspi_ret == SEC_I_CONTINUE_NEEDED || sspi_ret == SEC_E_OK) {
234             for (i = 0; i < 3; i++) {
235                 if (outbuf[i].BufferType == SECBUFFER_TOKEN && outbuf[i].cbBuffer > 0) {
236                     ret = ffurl_write(c->tls_shared.tcp, outbuf[i].pvBuffer, outbuf[i].cbBuffer);
237                     if (ret < 0 || ret != outbuf[i].cbBuffer) {
238                         av_log(h, AV_LOG_VERBOSE, "Failed to send handshake data\n");
239                         ret = AVERROR(EIO);
240                         goto fail;
241                     }
242                 }
243
244                 if (outbuf[i].pvBuffer != NULL) {
245                     FreeContextBuffer(outbuf[i].pvBuffer);
246                     outbuf[i].pvBuffer = NULL;
247                 }
248             }
249         } else {
250             if (sspi_ret == SEC_E_WRONG_PRINCIPAL)
251                 av_log(h, AV_LOG_ERROR, "SNI or certificate check failed\n");
252             else
253                 av_log(h, AV_LOG_ERROR, "Creating security context failed (0x%lx)\n", sspi_ret);
254             ret = AVERROR_UNKNOWN;
255             goto fail;
256         }
257
258         if (inbuf[1].BufferType == SECBUFFER_EXTRA && inbuf[1].cbBuffer > 0) {
259             if (c->enc_buf_offset > inbuf[1].cbBuffer) {
260                 memmove(c->enc_buf, (c->enc_buf + c->enc_buf_offset) - inbuf[1].cbBuffer,
261                         inbuf[1].cbBuffer);
262                 c->enc_buf_offset = inbuf[1].cbBuffer;
263                 if (sspi_ret == SEC_I_CONTINUE_NEEDED) {
264                     read_data = 0;
265                     continue;
266                 }
267             }
268         } else {
269             c->enc_buf_offset  = 0;
270         }
271
272         if (sspi_ret == SEC_I_CONTINUE_NEEDED) {
273             read_data = 1;
274             continue;
275         }
276
277         break;
278     }
279
280     return 0;
281
282 fail:
283     /* free any remaining output data */
284     for (i = 0; i < 3; i++) {
285         if (outbuf[i].pvBuffer != NULL) {
286             FreeContextBuffer(outbuf[i].pvBuffer);
287             outbuf[i].pvBuffer = NULL;
288         }
289     }
290
291     return ret;
292 }
293
294 static int tls_client_handshake(URLContext *h)
295 {
296     TLSContext *c = h->priv_data;
297     TLSShared *s = &c->tls_shared;
298     SecBuffer outbuf;
299     SecBufferDesc outbuf_desc;
300     SECURITY_STATUS sspi_ret;
301     int ret;
302
303     init_sec_buffer(&outbuf, SECBUFFER_EMPTY, NULL, 0);
304     init_sec_buffer_desc(&outbuf_desc, &outbuf, 1);
305
306     c->request_flags = ISC_REQ_SEQUENCE_DETECT | ISC_REQ_REPLAY_DETECT |
307                        ISC_REQ_CONFIDENTIALITY | ISC_REQ_ALLOCATE_MEMORY |
308                        ISC_REQ_STREAM;
309
310     sspi_ret = InitializeSecurityContext(&c->cred_handle, NULL, s->host, c->request_flags, 0, 0,
311                                          NULL, 0, &c->ctxt_handle, &outbuf_desc, &c->context_flags,
312                                          &c->ctxt_timestamp);
313     if (sspi_ret != SEC_I_CONTINUE_NEEDED) {
314         av_log(h, AV_LOG_ERROR, "Unable to create initial security context (0x%lx)\n", sspi_ret);
315         ret = AVERROR_UNKNOWN;
316         goto fail;
317     }
318
319     ret = ffurl_write(s->tcp, outbuf.pvBuffer, outbuf.cbBuffer);
320     FreeContextBuffer(outbuf.pvBuffer);
321     if (ret < 0 || ret != outbuf.cbBuffer) {
322         av_log(h, AV_LOG_ERROR, "Failed to send initial handshake data\n");
323         ret = AVERROR(EIO);
324         goto fail;
325     }
326
327     return tls_client_handshake_loop(h, 1);
328
329 fail:
330     DeleteSecurityContext(&c->ctxt_handle);
331     return ret;
332 }
333
334 static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
335 {
336     TLSContext *c = h->priv_data;
337     TLSShared *s = &c->tls_shared;
338     SECURITY_STATUS sspi_ret;
339     SCHANNEL_CRED schannel_cred = { 0 };
340     int ret;
341
342     if ((ret = ff_tls_open_underlying(s, h, uri, options)) < 0)
343         goto fail;
344
345     if (s->listen) {
346         av_log(h, AV_LOG_ERROR, "TLS Listen Sockets with SChannel is not implemented.\n");
347         ret = AVERROR(EINVAL);
348         goto fail;
349     }
350
351     /* SChannel Options */
352     schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
353
354     if (s->verify)
355         schannel_cred.dwFlags = SCH_CRED_AUTO_CRED_VALIDATION |
356                                 SCH_CRED_REVOCATION_CHECK_CHAIN;
357     else
358         schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION |
359                                 SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
360                                 SCH_CRED_IGNORE_REVOCATION_OFFLINE;
361
362     /* Get credential handle */
363     sspi_ret = AcquireCredentialsHandle(NULL, (TCHAR *)UNISP_NAME, SECPKG_CRED_OUTBOUND,
364                                         NULL,  &schannel_cred, NULL, NULL, &c->cred_handle,
365                                         &c->cred_timestamp);
366     if (sspi_ret != SEC_E_OK) {
367         av_log(h, AV_LOG_ERROR, "Unable to acquire security credentials (0x%lx)\n", sspi_ret);
368         ret = AVERROR_UNKNOWN;
369         goto fail;
370     }
371
372     ret = tls_client_handshake(h);
373     if (ret < 0)
374         goto fail;
375
376     c->connected = 1;
377
378     return 0;
379
380 fail:
381     tls_close(h);
382     return ret;
383 }
384
385 static int tls_read(URLContext *h, uint8_t *buf, int len)
386 {
387     TLSContext *c = h->priv_data;
388     TLSShared *s = &c->tls_shared;
389     SECURITY_STATUS sspi_ret = SEC_E_OK;
390     SecBuffer inbuf[4];
391     SecBufferDesc inbuf_desc;
392     int size, ret;
393     int min_enc_buf_size = len + SCHANNEL_FREE_BUFFER_SIZE;
394
395     if (len <= c->dec_buf_offset)
396         goto cleanup;
397
398     if (c->sspi_close_notify)
399         goto cleanup;
400
401     if (!c->connection_closed) {
402         size = c->enc_buf_size - c->enc_buf_offset;
403         if (size < SCHANNEL_FREE_BUFFER_SIZE || c->enc_buf_size < min_enc_buf_size) {
404             c->enc_buf_size = c->enc_buf_offset + SCHANNEL_FREE_BUFFER_SIZE;
405             if (c->enc_buf_size < min_enc_buf_size)
406                 c->enc_buf_size = min_enc_buf_size;
407             ret = av_reallocp(&c->enc_buf, c->enc_buf_size);
408             if (ret < 0) {
409                 c->enc_buf_size = c->enc_buf_offset = 0;
410                 return ret;
411             }
412         }
413
414         ret = ffurl_read(s->tcp, c->enc_buf + c->enc_buf_offset,
415                          c->enc_buf_size - c->enc_buf_offset);
416         if (ret < 0) {
417             av_log(h, AV_LOG_ERROR, "Unable to read from socket\n");
418             return ret;
419         } else if (ret == 0)
420             c->connection_closed = 1;
421
422         c->enc_buf_offset += ret;
423     }
424
425     while (c->enc_buf_offset > 0 && sspi_ret == SEC_E_OK && c->dec_buf_offset < len) {
426         /*  input buffer */
427         init_sec_buffer(&inbuf[0], SECBUFFER_DATA, c->enc_buf, c->enc_buf_offset);
428
429         /* additional buffers for possible output */
430         init_sec_buffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0);
431         init_sec_buffer(&inbuf[2], SECBUFFER_EMPTY, NULL, 0);
432         init_sec_buffer(&inbuf[3], SECBUFFER_EMPTY, NULL, 0);
433         init_sec_buffer_desc(&inbuf_desc, inbuf, 4);
434
435         sspi_ret = DecryptMessage(&c->ctxt_handle, &inbuf_desc, 0, NULL);
436         if (sspi_ret == SEC_E_OK || sspi_ret == SEC_I_RENEGOTIATE ||
437             sspi_ret == SEC_I_CONTEXT_EXPIRED) {
438             /* handle decrypted data */
439             if (inbuf[1].BufferType == SECBUFFER_DATA) {
440                 /* grow buffer if needed */
441                 size = inbuf[1].cbBuffer > SCHANNEL_FREE_BUFFER_SIZE ?
442                        inbuf[1].cbBuffer : SCHANNEL_FREE_BUFFER_SIZE;
443                 if (c->dec_buf_size - c->dec_buf_offset < size || c->dec_buf_size < len)  {
444                     c->dec_buf_size = c->dec_buf_offset + size;
445                     if (c->dec_buf_size < len)
446                         c->dec_buf_size = len;
447                     ret = av_reallocp(&c->dec_buf, c->dec_buf_size);
448                     if (ret < 0) {
449                         c->dec_buf_size = c->dec_buf_offset = 0;
450                         return ret;
451                     }
452                 }
453
454                 /* copy decrypted data to buffer */
455                 size = inbuf[1].cbBuffer;
456                 if (size) {
457                     memcpy(c->dec_buf + c->dec_buf_offset, inbuf[1].pvBuffer, size);
458                     c->dec_buf_offset += size;
459                 }
460             }
461             if (inbuf[3].BufferType == SECBUFFER_EXTRA && inbuf[3].cbBuffer > 0) {
462                 if (c->enc_buf_offset > inbuf[3].cbBuffer) {
463                     memmove(c->enc_buf, (c->enc_buf + c->enc_buf_offset) - inbuf[3].cbBuffer,
464                     inbuf[3].cbBuffer);
465                     c->enc_buf_offset = inbuf[3].cbBuffer;
466                 }
467             } else
468                 c->enc_buf_offset = 0;
469
470             if (sspi_ret == SEC_I_RENEGOTIATE) {
471                 if (c->enc_buf_offset) {
472                     av_log(h, AV_LOG_ERROR, "Cannot renegotiate, encrypted data buffer not empty\n");
473                     ret = AVERROR_UNKNOWN;
474                     goto cleanup;
475                 }
476
477                 av_log(h, AV_LOG_VERBOSE, "Re-negotiating security context\n");
478                 ret = tls_client_handshake_loop(h, 0);
479                 if (ret < 0) {
480                     goto cleanup;
481                 }
482                 sspi_ret = SEC_E_OK;
483                 continue;
484             } else if (sspi_ret == SEC_I_CONTEXT_EXPIRED) {
485                 c->sspi_close_notify = 1;
486                 if (!c->connection_closed) {
487                     c->connection_closed = 1;
488                     av_log(h, AV_LOG_VERBOSE, "Server closed the connection\n");
489                 }
490                 ret = 0;
491                 goto cleanup;
492             }
493         } else if (sspi_ret == SEC_E_INCOMPLETE_MESSAGE) {
494             ret = AVERROR(EAGAIN);
495             goto cleanup;
496         } else {
497             av_log(h, AV_LOG_ERROR, "Unable to decrypt message (error 0x%x)\n", (unsigned)sspi_ret);
498             ret = AVERROR(EIO);
499             goto cleanup;
500         }
501     }
502
503     ret = 0;
504
505 cleanup:
506     size = FFMIN(len, c->dec_buf_offset);
507     if (size) {
508         memcpy(buf, c->dec_buf, size);
509         memmove(c->dec_buf, c->dec_buf + size, c->dec_buf_offset - size);
510         c->dec_buf_offset -= size;
511
512         return size;
513     }
514
515     if (ret == 0 && !c->connection_closed)
516         ret = AVERROR(EAGAIN);
517
518     return ret < 0 ? ret : 0;
519 }
520
521 static int tls_write(URLContext *h, const uint8_t *buf, int len)
522 {
523     TLSContext *c = h->priv_data;
524     TLSShared *s = &c->tls_shared;
525     SECURITY_STATUS sspi_ret;
526     int ret = 0, data_size;
527     uint8_t *data = NULL;
528     SecBuffer outbuf[4];
529     SecBufferDesc outbuf_desc;
530
531     if (c->sizes.cbMaximumMessage == 0) {
532         sspi_ret = QueryContextAttributes(&c->ctxt_handle, SECPKG_ATTR_STREAM_SIZES, &c->sizes);
533         if (sspi_ret != SEC_E_OK)
534             return AVERROR_UNKNOWN;
535     }
536
537     /* limit how much data we can consume */
538     len = FFMIN(len, c->sizes.cbMaximumMessage);
539
540     data_size = c->sizes.cbHeader + len + c->sizes.cbTrailer;
541     data = av_malloc(data_size);
542     if (data == NULL)
543         return AVERROR(ENOMEM);
544
545     init_sec_buffer(&outbuf[0], SECBUFFER_STREAM_HEADER,
546                   data, c->sizes.cbHeader);
547     init_sec_buffer(&outbuf[1], SECBUFFER_DATA,
548                   data + c->sizes.cbHeader, len);
549     init_sec_buffer(&outbuf[2], SECBUFFER_STREAM_TRAILER,
550                   data + c->sizes.cbHeader + len,
551                   c->sizes.cbTrailer);
552     init_sec_buffer(&outbuf[3], SECBUFFER_EMPTY, NULL, 0);
553     init_sec_buffer_desc(&outbuf_desc, outbuf, 4);
554
555     memcpy(outbuf[1].pvBuffer, buf, len);
556
557     sspi_ret = EncryptMessage(&c->ctxt_handle, 0, &outbuf_desc, 0);
558     if (sspi_ret == SEC_E_OK)  {
559         len = outbuf[0].cbBuffer + outbuf[1].cbBuffer + outbuf[2].cbBuffer;
560         ret = ffurl_write(s->tcp, data, len);
561         if (ret < 0 || ret != len) {
562             ret = AVERROR(EIO);
563             av_log(h, AV_LOG_ERROR, "Writing encrypted data to socket failed\n");
564             goto done;
565         }
566     } else {
567         av_log(h, AV_LOG_ERROR, "Encrypting data failed\n");
568         if (sspi_ret == SEC_E_INSUFFICIENT_MEMORY)
569             ret = AVERROR(ENOMEM);
570         else
571             ret = AVERROR(EIO);
572         goto done;
573     }
574
575 done:
576     av_freep(&data);
577     return ret < 0 ? ret : outbuf[1].cbBuffer;
578 }
579
580 static int tls_get_file_handle(URLContext *h)
581 {
582     TLSContext *c = h->priv_data;
583     return ffurl_get_file_handle(c->tls_shared.tcp);
584 }
585
586 static const AVOption options[] = {
587     TLS_COMMON_OPTIONS(TLSContext, tls_shared),
588     { NULL }
589 };
590
591 static const AVClass tls_class = {
592     .class_name = "tls",
593     .item_name  = av_default_item_name,
594     .option     = options,
595     .version    = LIBAVUTIL_VERSION_INT,
596 };
597
598 const URLProtocol ff_tls_protocol = {
599     .name           = "tls",
600     .url_open2      = tls_open,
601     .url_read       = tls_read,
602     .url_write      = tls_write,
603     .url_close      = tls_close,
604     .url_get_file_handle = tls_get_file_handle,
605     .priv_data_size = sizeof(TLSContext),
606     .flags          = URL_PROTOCOL_FLAG_NETWORK,
607     .priv_data_class = &tls_class,
608 };