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tls_schannel.c
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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;
46 
47  CredHandle cred_handle;
48  TimeStamp cred_timestamp;
49 
50  CtxtHandle ctxt_handle;
51  TimeStamp ctxt_timestamp;
52 
55 
59 
63 
64  SecPkgContext_StreamSizes sizes;
65 
66  int connected;
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 
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 
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)
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;
160  if (ret < 0)
161  goto fail;
163  }
164 
165  if (c->dec_buf == NULL) {
166  c->dec_buf_offset = 0;
168  if (ret < 0)
169  goto fail;
171  }
172 
173  while (1) {
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 
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) {
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 == AVERROR_EOF) {
417  c->connection_closed = 1;
418  ret = 0;
419  } else if (ret < 0) {
420  av_log(h, AV_LOG_ERROR, "Unable to read from socket\n");
421  return ret;
422  }
423 
424  c->enc_buf_offset += ret;
425  }
426 
427  while (c->enc_buf_offset > 0 && sspi_ret == SEC_E_OK && c->dec_buf_offset < len) {
428  /* input buffer */
429  init_sec_buffer(&inbuf[0], SECBUFFER_DATA, c->enc_buf, c->enc_buf_offset);
430 
431  /* additional buffers for possible output */
432  init_sec_buffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0);
433  init_sec_buffer(&inbuf[2], SECBUFFER_EMPTY, NULL, 0);
434  init_sec_buffer(&inbuf[3], SECBUFFER_EMPTY, NULL, 0);
435  init_sec_buffer_desc(&inbuf_desc, inbuf, 4);
436 
437  sspi_ret = DecryptMessage(&c->ctxt_handle, &inbuf_desc, 0, NULL);
438  if (sspi_ret == SEC_E_OK || sspi_ret == SEC_I_RENEGOTIATE ||
439  sspi_ret == SEC_I_CONTEXT_EXPIRED) {
440  /* handle decrypted data */
441  if (inbuf[1].BufferType == SECBUFFER_DATA) {
442  /* grow buffer if needed */
443  size = inbuf[1].cbBuffer > SCHANNEL_FREE_BUFFER_SIZE ?
444  inbuf[1].cbBuffer : SCHANNEL_FREE_BUFFER_SIZE;
445  if (c->dec_buf_size - c->dec_buf_offset < size || c->dec_buf_size < len) {
446  c->dec_buf_size = c->dec_buf_offset + size;
447  if (c->dec_buf_size < len)
448  c->dec_buf_size = len;
449  ret = av_reallocp(&c->dec_buf, c->dec_buf_size);
450  if (ret < 0) {
451  c->dec_buf_size = c->dec_buf_offset = 0;
452  return ret;
453  }
454  }
455 
456  /* copy decrypted data to buffer */
457  size = inbuf[1].cbBuffer;
458  if (size) {
459  memcpy(c->dec_buf + c->dec_buf_offset, inbuf[1].pvBuffer, size);
460  c->dec_buf_offset += size;
461  }
462  }
463  if (inbuf[3].BufferType == SECBUFFER_EXTRA && inbuf[3].cbBuffer > 0) {
464  if (c->enc_buf_offset > inbuf[3].cbBuffer) {
465  memmove(c->enc_buf, (c->enc_buf + c->enc_buf_offset) - inbuf[3].cbBuffer,
466  inbuf[3].cbBuffer);
467  c->enc_buf_offset = inbuf[3].cbBuffer;
468  }
469  } else
470  c->enc_buf_offset = 0;
471 
472  if (sspi_ret == SEC_I_RENEGOTIATE) {
473  if (c->enc_buf_offset) {
474  av_log(h, AV_LOG_ERROR, "Cannot renegotiate, encrypted data buffer not empty\n");
475  ret = AVERROR_UNKNOWN;
476  goto cleanup;
477  }
478 
479  av_log(h, AV_LOG_VERBOSE, "Re-negotiating security context\n");
480  ret = tls_client_handshake_loop(h, 0);
481  if (ret < 0) {
482  goto cleanup;
483  }
484  sspi_ret = SEC_E_OK;
485  continue;
486  } else if (sspi_ret == SEC_I_CONTEXT_EXPIRED) {
487  c->sspi_close_notify = 1;
488  if (!c->connection_closed) {
489  c->connection_closed = 1;
490  av_log(h, AV_LOG_VERBOSE, "Server closed the connection\n");
491  }
492  ret = 0;
493  goto cleanup;
494  }
495  } else if (sspi_ret == SEC_E_INCOMPLETE_MESSAGE) {
496  ret = AVERROR(EAGAIN);
497  goto cleanup;
498  } else {
499  av_log(h, AV_LOG_ERROR, "Unable to decrypt message (error 0x%x)\n", (unsigned)sspi_ret);
500  ret = AVERROR(EIO);
501  goto cleanup;
502  }
503  }
504 
505  ret = 0;
506 
507 cleanup:
508  size = FFMIN(len, c->dec_buf_offset);
509  if (size) {
510  memcpy(buf, c->dec_buf, size);
511  memmove(c->dec_buf, c->dec_buf + size, c->dec_buf_offset - size);
512  c->dec_buf_offset -= size;
513 
514  return size;
515  }
516 
517  if (ret == 0 && !c->connection_closed)
518  ret = AVERROR(EAGAIN);
519 
520  return ret < 0 ? ret : AVERROR_EOF;
521 }
522 
523 static int tls_write(URLContext *h, const uint8_t *buf, int len)
524 {
525  TLSContext *c = h->priv_data;
526  TLSShared *s = &c->tls_shared;
527  SECURITY_STATUS sspi_ret;
528  int ret = 0, data_size;
529  uint8_t *data = NULL;
530  SecBuffer outbuf[4];
531  SecBufferDesc outbuf_desc;
532 
533  if (c->sizes.cbMaximumMessage == 0) {
534  sspi_ret = QueryContextAttributes(&c->ctxt_handle, SECPKG_ATTR_STREAM_SIZES, &c->sizes);
535  if (sspi_ret != SEC_E_OK)
536  return AVERROR_UNKNOWN;
537  }
538 
539  /* limit how much data we can consume */
540  len = FFMIN(len, c->sizes.cbMaximumMessage);
541 
542  data_size = c->sizes.cbHeader + len + c->sizes.cbTrailer;
543  data = av_malloc(data_size);
544  if (data == NULL)
545  return AVERROR(ENOMEM);
546 
547  init_sec_buffer(&outbuf[0], SECBUFFER_STREAM_HEADER,
548  data, c->sizes.cbHeader);
549  init_sec_buffer(&outbuf[1], SECBUFFER_DATA,
550  data + c->sizes.cbHeader, len);
551  init_sec_buffer(&outbuf[2], SECBUFFER_STREAM_TRAILER,
552  data + c->sizes.cbHeader + len,
553  c->sizes.cbTrailer);
554  init_sec_buffer(&outbuf[3], SECBUFFER_EMPTY, NULL, 0);
555  init_sec_buffer_desc(&outbuf_desc, outbuf, 4);
556 
557  memcpy(outbuf[1].pvBuffer, buf, len);
558 
559  sspi_ret = EncryptMessage(&c->ctxt_handle, 0, &outbuf_desc, 0);
560  if (sspi_ret == SEC_E_OK) {
561  len = outbuf[0].cbBuffer + outbuf[1].cbBuffer + outbuf[2].cbBuffer;
562  ret = ffurl_write(s->tcp, data, len);
563  if (ret < 0 || ret != len) {
564  ret = AVERROR(EIO);
565  av_log(h, AV_LOG_ERROR, "Writing encrypted data to socket failed\n");
566  goto done;
567  }
568  } else {
569  av_log(h, AV_LOG_ERROR, "Encrypting data failed\n");
570  if (sspi_ret == SEC_E_INSUFFICIENT_MEMORY)
571  ret = AVERROR(ENOMEM);
572  else
573  ret = AVERROR(EIO);
574  goto done;
575  }
576 
577 done:
578  av_freep(&data);
579  return ret < 0 ? ret : outbuf[1].cbBuffer;
580 }
581 
583 {
584  TLSContext *c = h->priv_data;
586 }
587 
588 static const AVOption options[] = {
589  TLS_COMMON_OPTIONS(TLSContext, tls_shared),
590  { NULL }
591 };
592 
593 static const AVClass tls_class = {
594  .class_name = "tls",
595  .item_name = av_default_item_name,
596  .option = options,
597  .version = LIBAVUTIL_VERSION_INT,
598 };
599 
601  .name = "tls",
602  .url_open2 = tls_open,
603  .url_read = tls_read,
604  .url_write = tls_write,
605  .url_close = tls_close,
606  .url_get_file_handle = tls_get_file_handle,
607  .priv_data_size = sizeof(TLSContext),
609  .priv_data_class = &tls_class,
610 };
#define NULL
Definition: coverity.c:32
ULONG request_flags
Definition: tls_schannel.c:53
const char * s
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AVOption.
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ptrdiff_t const GLvoid * data
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int verify
Definition: tls.h:31
static const AVClass tls_class
Definition: tls_schannel.c:593
#define LIBAVUTIL_VERSION_INT
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static int read_data(void *opaque, uint8_t *buf, int buf_size)
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int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
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const char * desc
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const URLProtocol ff_tls_protocol
Definition: tls_schannel.c:600
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
int connection_closed
Definition: tls_schannel.c:67
int enc_buf_offset
Definition: tls_schannel.c:58
int listen
Definition: tls.h:34
#define SCHANNEL_FREE_BUFFER_SIZE
Definition: tls_schannel.c:36
TimeStamp ctxt_timestamp
Definition: tls_schannel.c:51
CtxtHandle ctxt_handle
Definition: tls_schannel.c:50
uint8_t * dec_buf
Definition: tls_schannel.c:60
static const AVOption options[]
Definition: tls_schannel.c:588
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
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uint8_t
#define av_malloc(s)
static int tls_read(URLContext *h, uint8_t *buf, int len)
Definition: tls_schannel.c:385
static int tls_write(URLContext *h, const uint8_t *buf, int len)
Definition: tls_schannel.c:523
miscellaneous OS support macros and functions.
int sspi_close_notify
Definition: tls_schannel.c:68
ULONG context_flags
Definition: tls_schannel.c:54
static void init_sec_buffer_desc(SecBufferDesc *desc, SecBuffer *buffers, unsigned long buffer_count)
Definition: tls_schannel.c:79
Definition: tls.h:29
static int flags
Definition: log.c:55
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int dec_buf_size
Definition: tls_schannel.c:61
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
static void init_sec_buffer(SecBuffer *buffer, unsigned long type, void *data, unsigned long size)
Definition: tls_schannel.c:71
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define SECBUFFER_ALERT
Definition: tls_schannel.c:40
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **options)
Definition: tls_schannel.c:334
#define fail()
Definition: checkasm.h:116
char * host
Definition: tls.h:36
#define FFMIN(a, b)
Definition: common.h:96
static int tls_close(URLContext *h)
Definition: tls_schannel.c:126
SecPkgContext_StreamSizes sizes
Definition: tls_schannel.c:64
#define TLS_COMMON_OPTIONS(pstruct, options_field)
Definition: tls.h:45
int ffurl_get_file_handle(URLContext *h)
Return the file descriptor associated with this URL.
Definition: avio.c:626
uint8_t * enc_buf
Definition: tls_schannel.c:56
TimeStamp cred_timestamp
Definition: tls_schannel.c:48
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
static int tls_shutdown_client(URLContext *h)
Definition: tls_schannel.c:87
CredHandle cred_handle
Definition: tls_schannel.c:47
TLSShared tls_shared
Definition: tls_gnutls.c:50
void * buf
Definition: avisynth_c.h:690
Definition: url.h:38
GLint GLenum type
Definition: opengl_enc.c:105
Describe the class of an AVClass context structure.
Definition: log.h:67
void * priv_data
Definition: url.h:41
#define SCHANNEL_INITIAL_BUFFER_SIZE
Definition: tls_schannel.c:35
uint32_t DWORD
int enc_buf_size
Definition: tls_schannel.c:57
const char * name
Definition: url.h:55
static int tls_client_handshake(URLContext *h)
Definition: tls_schannel.c:294
int ffurl_close(URLContext *h)
Definition: avio.c:467
Main libavformat public API header.
GLuint * buffers
Definition: opengl_enc.c:99
int ff_tls_open_underlying(TLSShared *c, URLContext *parent, const char *uri, AVDictionary **options)
Definition: tls.c:56
static double c[64]
uint32_t ULONG
URLContext * tcp
Definition: tls.h:41
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
static int tls_client_handshake_loop(URLContext *h, int initial)
Definition: tls_schannel.c:146
int dec_buf_offset
Definition: tls_schannel.c:62
int len
static int tls_get_file_handle(URLContext *h)
Definition: tls_schannel.c:582
#define av_freep(p)
unbuffered private I/O API
int ffurl_read(URLContext *h, unsigned char *buf, int size)
Read up to size bytes from the resource accessed by h, and store the read bytes in buf...
Definition: avio.c:407
GLuint buffer
Definition: opengl_enc.c:102
static av_cold void cleanup(FlashSV2Context *s)
Definition: flashsv2enc.c:127