gnutls.c 17.5 KB
Newer Older
Ted Zlatanov's avatar
Ted Zlatanov committed
1
/* GnuTLS glue for GNU Emacs.
2
   Copyright (C) 2010-2011  Free Software Foundation, Inc.
Ted Zlatanov's avatar
Ted Zlatanov committed
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

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>
#include <errno.h>
#include <setjmp.h>

#include "lisp.h"
#include "process.h"

#ifdef HAVE_GNUTLS
#include <gnutls/gnutls.h>

Lisp_Object Qgnutls_code;
Lisp_Object Qgnutls_anon, Qgnutls_x509pki;
Lisp_Object Qgnutls_e_interrupted, Qgnutls_e_again,
  Qgnutls_e_invalid_session, Qgnutls_e_not_ready_for_handshake;
int global_initialized;

35 36 37 38 39 40 41
/* The following are for the property list of `gnutls-boot'.  */
Lisp_Object Qgnutls_bootprop_priority;
Lisp_Object Qgnutls_bootprop_trustfiles;
Lisp_Object Qgnutls_bootprop_keyfiles;
Lisp_Object Qgnutls_bootprop_callbacks;
Lisp_Object Qgnutls_bootprop_loglevel;

42
static void
43 44 45 46 47 48 49 50 51
emacs_gnutls_handshake (struct Lisp_Process *proc)
{
  gnutls_session_t state = proc->gnutls_state;
  int ret;

  if (proc->gnutls_initstage < GNUTLS_STAGE_HANDSHAKE_CANDO)
    return;

  if (proc->gnutls_initstage < GNUTLS_STAGE_TRANSPORT_POINTERS_SET)
52
    {
53 54 55
      /* This is how GnuTLS takes sockets: as file descriptors passed
         in.  For an Emacs process socket, infd and outfd are the
         same but we use this two-argument version for clarity.  */
56 57 58
      gnutls_transport_set_ptr2 (state,
				 (gnutls_transport_ptr_t) (long) proc->infd,
				 (gnutls_transport_ptr_t) (long) proc->outfd);
59

60 61
      proc->gnutls_initstage = GNUTLS_STAGE_TRANSPORT_POINTERS_SET;
    }
62 63 64 65 66

  ret = gnutls_handshake (state);
  proc->gnutls_initstage = GNUTLS_STAGE_HANDSHAKE_TRIED;

  if (ret == GNUTLS_E_SUCCESS)
67 68 69 70
    {
      /* here we're finally done.  */
      proc->gnutls_initstage = GNUTLS_STAGE_READY;
    }
71 72
}

Ted Zlatanov's avatar
Ted Zlatanov committed
73
int
74
emacs_gnutls_write (int fildes, struct Lisp_Process *proc, char *buf,
Ted Zlatanov's avatar
Ted Zlatanov committed
75 76 77
                    unsigned int nbyte)
{
  register int rtnval, bytes_written;
78 79
  gnutls_session_t state = proc->gnutls_state;

80 81 82 83 84 85 86
  if (proc->gnutls_initstage != GNUTLS_STAGE_READY) {
#ifdef EWOULDBLOCK
    errno = EWOULDBLOCK;
#endif
#ifdef EAGAIN
    errno = EAGAIN;
#endif
87
    return -1;
88
  }
Ted Zlatanov's avatar
Ted Zlatanov committed
89 90 91 92 93 94 95

  bytes_written = 0;

  while (nbyte > 0)
    {
      rtnval = gnutls_write (state, buf, nbyte);

96
      if (rtnval < 0)
Ted Zlatanov's avatar
Ted Zlatanov committed
97
        {
98
          if (rtnval == GNUTLS_E_AGAIN || rtnval == GNUTLS_E_INTERRUPTED)
Ted Zlatanov's avatar
Ted Zlatanov committed
99 100 101 102 103 104 105 106 107 108 109 110 111 112
            continue;
          else
            return (bytes_written ? bytes_written : -1);
        }

      buf += rtnval;
      nbyte -= rtnval;
      bytes_written += rtnval;
    }

  return (bytes_written);
}

int
113
emacs_gnutls_read (int fildes, struct Lisp_Process *proc, char *buf,
Ted Zlatanov's avatar
Ted Zlatanov committed
114 115 116
                   unsigned int nbyte)
{
  register int rtnval;
117 118
  gnutls_session_t state = proc->gnutls_state;

119 120 121 122 123
  if (proc->gnutls_initstage != GNUTLS_STAGE_READY)
    {
      emacs_gnutls_handshake (proc);
      return -1;
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
124

125 126 127
  rtnval = gnutls_read (state, buf, nbyte);
  if (rtnval >= 0)
    return rtnval;
128 129 130 131 132 133 134
  else {
    if (rtnval == GNUTLS_E_AGAIN ||
	rtnval == GNUTLS_E_INTERRUPTED)
      return -1;
    else
      return 0;
  }
Ted Zlatanov's avatar
Ted Zlatanov committed
135 136 137 138 139 140
}

/* convert an integer error to a Lisp_Object; it will be either a
   known symbol like `gnutls_e_interrupted' and `gnutls_e_again' or
   simply the integer value of the error.  GNUTLS_E_SUCCESS is mapped
   to Qt.  */
141 142
static Lisp_Object
gnutls_make_error (int error)
Ted Zlatanov's avatar
Ted Zlatanov committed
143 144
{
  switch (error)
145 146 147 148 149 150 151 152 153 154
    {
    case GNUTLS_E_SUCCESS:
      return Qt;
    case GNUTLS_E_AGAIN:
      return Qgnutls_e_again;
    case GNUTLS_E_INTERRUPTED:
      return Qgnutls_e_interrupted;
    case GNUTLS_E_INVALID_SESSION:
      return Qgnutls_e_invalid_session;
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
155 156 157 158 159

  return make_number (error);
}

DEFUN ("gnutls-get-initstage", Fgnutls_get_initstage, Sgnutls_get_initstage, 1, 1, 0,
160
       doc: /* Return the GnuTLS init stage of process PROC.
Ted Zlatanov's avatar
Ted Zlatanov committed
161
See also `gnutls-boot'.  */)
162
  (Lisp_Object proc)
Ted Zlatanov's avatar
Ted Zlatanov committed
163 164 165 166 167 168 169
{
  CHECK_PROCESS (proc);

  return make_number (GNUTLS_INITSTAGE (proc));
}

DEFUN ("gnutls-errorp", Fgnutls_errorp, Sgnutls_errorp, 1, 1, 0,
170 171 172 173
       doc: /* Return t if ERROR indicates a GnuTLS problem.
ERROR is an integer or a symbol with an integer `gnutls-code' property.
usage: (gnutls-errorp ERROR)  */)
  (Lisp_Object err)
Ted Zlatanov's avatar
Ted Zlatanov committed
174
{
175
  if (EQ (err, Qt)) return Qnil;
Ted Zlatanov's avatar
Ted Zlatanov committed
176 177 178 179 180

  return Qt;
}

DEFUN ("gnutls-error-fatalp", Fgnutls_error_fatalp, Sgnutls_error_fatalp, 1, 1, 0,
181 182 183 184
       doc: /* Check if ERROR is fatal.
ERROR is an integer or a symbol with an integer `gnutls-code' property.
usage: (gnutls-error-fatalp ERROR)  */)
  (Lisp_Object err)
Ted Zlatanov's avatar
Ted Zlatanov committed
185 186 187 188 189 190 191
{
  Lisp_Object code;

  if (EQ (err, Qt)) return Qnil;

  if (SYMBOLP (err))
    {
192 193 194 195 196 197 198 199 200
      code = Fget (err, Qgnutls_code);
      if (NUMBERP (code))
	{
	  err = code;
	}
      else
	{
	  error ("Symbol has no numeric gnutls-code property");
	}
Ted Zlatanov's avatar
Ted Zlatanov committed
201 202 203 204 205 206 207 208 209 210 211 212
    }

  if (!NUMBERP (err))
    error ("Not an error symbol or code");

  if (0 == gnutls_error_is_fatal (XINT (err)))
    return Qnil;

  return Qt;
}

DEFUN ("gnutls-error-string", Fgnutls_error_string, Sgnutls_error_string, 1, 1, 0,
213 214 215 216
       doc: /* Return a description of ERROR.
ERROR is an integer or a symbol with an integer `gnutls-code' property.
usage: (gnutls-error-string ERROR)  */)
  (Lisp_Object err)
Ted Zlatanov's avatar
Ted Zlatanov committed
217 218 219 220 221 222 223
{
  Lisp_Object code;

  if (EQ (err, Qt)) return build_string ("Not an error");

  if (SYMBOLP (err))
    {
224 225 226 227 228 229 230 231 232
      code = Fget (err, Qgnutls_code);
      if (NUMBERP (code))
	{
	  err = code;
	}
      else
	{
	  return build_string ("Symbol has no numeric gnutls-code property");
	}
Ted Zlatanov's avatar
Ted Zlatanov committed
233 234 235 236 237 238 239 240 241
    }

  if (!NUMBERP (err))
    return build_string ("Not an error symbol or code");

  return build_string (gnutls_strerror (XINT (err)));
}

DEFUN ("gnutls-deinit", Fgnutls_deinit, Sgnutls_deinit, 1, 1, 0,
242
       doc: /* Deallocate GnuTLS resources associated with process PROC.
Ted Zlatanov's avatar
Ted Zlatanov committed
243
See also `gnutls-init'.  */)
244
  (Lisp_Object proc)
Ted Zlatanov's avatar
Ted Zlatanov committed
245 246 247 248 249 250 251
{
  gnutls_session_t state;

  CHECK_PROCESS (proc);
  state = XPROCESS (proc)->gnutls_state;

  if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT)
252
    {
Ted Zlatanov's avatar
Ted Zlatanov committed
253 254
      gnutls_deinit (state);
      GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT - 1;
255
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
256 257 258 259

  return Qt;
}

260 261
/* Initializes global GnuTLS state to defaults.
Call `gnutls-global-deinit' when GnuTLS usage is no longer needed.
Ted Zlatanov's avatar
Ted Zlatanov committed
262
Returns zero on success.  */
263 264
static Lisp_Object
gnutls_emacs_global_init (void)
Ted Zlatanov's avatar
Ted Zlatanov committed
265 266 267 268 269 270 271 272 273 274 275
{
  int ret = GNUTLS_E_SUCCESS;

  if (!global_initialized)
    ret = gnutls_global_init ();

  global_initialized = 1;

  return gnutls_make_error (ret);
}

276
/* Deinitializes global GnuTLS state.
Ted Zlatanov's avatar
Ted Zlatanov committed
277
See also `gnutls-global-init'.  */
278 279
static Lisp_Object
gnutls_emacs_global_deinit (void)
Ted Zlatanov's avatar
Ted Zlatanov committed
280 281 282 283 284 285 286 287 288
{
  if (global_initialized)
    gnutls_global_deinit ();

  global_initialized = 0;

  return gnutls_make_error (GNUTLS_E_SUCCESS);
}

289 290
static void
gnutls_log_function (int level, const char* string)
291
{
292
  message ("gnutls.c: [%d] %s", level, string);
293 294
}

295 296 297 298 299 300 301 302
static void
gnutls_log_function2 (int level, const char* string, const char* extra)
{
  message ("gnutls.c: [%d] %s %s", level, string, extra);
}

DEFUN ("gnutls-boot", Fgnutls_boot, Sgnutls_boot, 3, 3, 0,
       doc: /* Initialize GnuTLS client for process PROC with TYPE+PROPLIST.
Ted Zlatanov's avatar
Ted Zlatanov committed
303 304 305
Currently only client mode is supported.  Returns a success/failure
value you can check with `gnutls-errorp'.

306 307 308 309 310 311 312 313
TYPE is a symbol, either `gnutls-anon' or `gnutls-x509pki'.
PROPLIST is a property list with the following keys:

:priority is a GnuTLS priority string, defaults to "NORMAL".
:trustfiles is a list of PEM-encoded trust files for `gnutls-x509pki'.
:keyfiles is a list of PEM-encoded key files for `gnutls-x509pki'.
:callbacks is an alist of callback functions (TODO).
:loglevel is the debug level requested from GnuTLS, try 4.
314

315 316 317
The debug level will be set for this process AND globally for GnuTLS.
So if you set it higher or lower at any point, it affects global
debugging.
Ted Zlatanov's avatar
Ted Zlatanov committed
318 319 320 321 322

Note that the priority is set on the client.  The server does not use
the protocols's priority except for disabling protocols that were not
specified.

323
Processes must be initialized with this function before other GnuTLS
Ted Zlatanov's avatar
Ted Zlatanov committed
324 325 326 327
functions are used.  This function allocates resources which can only
be deallocated by calling `gnutls-deinit' or by calling it again.

Each authentication type may need additional information in order to
328 329 330
work.  For X.509 PKI (`gnutls-x509pki'), you probably need at least
one trustfile (usually a CA bundle).  */)
  (Lisp_Object proc, Lisp_Object type, Lisp_Object proplist)
Ted Zlatanov's avatar
Ted Zlatanov committed
331 332 333
{
  int ret = GNUTLS_E_SUCCESS;

334 335
  int max_log_level = 0;

Ted Zlatanov's avatar
Ted Zlatanov committed
336 337 338 339 340 341 342
  /* TODO: GNUTLS_X509_FMT_DER is also an option.  */
  int file_format = GNUTLS_X509_FMT_PEM;

  gnutls_session_t state;
  gnutls_certificate_credentials_t x509_cred;
  gnutls_anon_client_credentials_t anon_cred;
  Lisp_Object global_init;
343 344 345 346 347 348 349 350 351
  char* priority_string_ptr = "NORMAL"; /* default priority string.  */
  Lisp_Object tail;

  /* Placeholders for the property list elements.  */
  Lisp_Object priority_string;
  Lisp_Object trustfiles;
  Lisp_Object keyfiles;
  Lisp_Object callbacks;
  Lisp_Object loglevel;
Ted Zlatanov's avatar
Ted Zlatanov committed
352 353 354

  CHECK_PROCESS (proc);
  CHECK_SYMBOL (type);
355 356 357 358 359 360 361
  CHECK_LIST (proplist);

  priority_string = Fplist_get (proplist, Qgnutls_bootprop_priority);
  trustfiles      = Fplist_get (proplist, Qgnutls_bootprop_trustfiles);
  keyfiles        = Fplist_get (proplist, Qgnutls_bootprop_keyfiles);
  callbacks       = Fplist_get (proplist, Qgnutls_bootprop_callbacks);
  loglevel        = Fplist_get (proplist, Qgnutls_bootprop_loglevel);
Ted Zlatanov's avatar
Ted Zlatanov committed
362 363

  state = XPROCESS (proc)->gnutls_state;
364
  XPROCESS (proc)->gnutls_p = 1;
Ted Zlatanov's avatar
Ted Zlatanov committed
365

366 367 368 369 370 371 372
  if (NUMBERP (loglevel))
    {
      gnutls_global_set_log_function (gnutls_log_function);
      gnutls_global_set_log_level (XINT (loglevel));
      max_log_level = XINT (loglevel);
      XPROCESS (proc)->gnutls_log_level = max_log_level;
    }
373

Ted Zlatanov's avatar
Ted Zlatanov committed
374 375 376 377 378 379 380
  /* always initialize globals.  */
  global_init = gnutls_emacs_global_init ();
  if (! NILP (Fgnutls_errorp (global_init)))
    return global_init;

  /* deinit and free resources.  */
  if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_CRED_ALLOC)
381
    {
382 383
      GNUTLS_LOG (1, max_log_level, "deallocating credentials");

Ted Zlatanov's avatar
Ted Zlatanov committed
384
      if (EQ (type, Qgnutls_x509pki))
385
	{
386 387
          GNUTLS_LOG (2, max_log_level, "deallocating x509 credentials");
          x509_cred = XPROCESS (proc)->gnutls_x509_cred;
Ted Zlatanov's avatar
Ted Zlatanov committed
388
          gnutls_certificate_free_credentials (x509_cred);
389
	}
Ted Zlatanov's avatar
Ted Zlatanov committed
390
      else if (EQ (type, Qgnutls_anon))
391
	{
392 393
          GNUTLS_LOG (2, max_log_level, "deallocating anon credentials");
          anon_cred = XPROCESS (proc)->gnutls_anon_cred;
Ted Zlatanov's avatar
Ted Zlatanov committed
394
          gnutls_anon_free_client_credentials (anon_cred);
395
	}
Ted Zlatanov's avatar
Ted Zlatanov committed
396
      else
397
	{
Ted Zlatanov's avatar
Ted Zlatanov committed
398 399
          error ("unknown credential type");
          ret = GNUTLS_EMACS_ERROR_INVALID_TYPE;
400
	}
Ted Zlatanov's avatar
Ted Zlatanov committed
401 402

      if (GNUTLS_INITSTAGE (proc) >= GNUTLS_STAGE_INIT)
403
	{
404
          GNUTLS_LOG (1, max_log_level, "deallocating x509 credentials");
Ted Zlatanov's avatar
Ted Zlatanov committed
405
          Fgnutls_deinit (proc);
406 407
	}
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
408 409 410

  GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_EMPTY;

411 412
  GNUTLS_LOG (1, max_log_level, "allocating credentials");

Ted Zlatanov's avatar
Ted Zlatanov committed
413
  if (EQ (type, Qgnutls_x509pki))
414
    {
415 416
      GNUTLS_LOG (2, max_log_level, "allocating x509 credentials");
      x509_cred = XPROCESS (proc)->gnutls_x509_cred;
Ted Zlatanov's avatar
Ted Zlatanov committed
417 418
      if (gnutls_certificate_allocate_credentials (&x509_cred) < 0)
        memory_full ();
419
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
420
  else if (EQ (type, Qgnutls_anon))
421
    {
422 423
      GNUTLS_LOG (2, max_log_level, "allocating anon credentials");
      anon_cred = XPROCESS (proc)->gnutls_anon_cred;
Ted Zlatanov's avatar
Ted Zlatanov committed
424 425
      if (gnutls_anon_allocate_client_credentials (&anon_cred) < 0)
        memory_full ();
426
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
427
  else
428
    {
Ted Zlatanov's avatar
Ted Zlatanov committed
429 430
      error ("unknown credential type");
      ret = GNUTLS_EMACS_ERROR_INVALID_TYPE;
431
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
432 433

  if (ret < GNUTLS_E_SUCCESS)
434
    return gnutls_make_error (ret);
Ted Zlatanov's avatar
Ted Zlatanov committed
435 436 437 438

  GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_ALLOC;

  if (EQ (type, Qgnutls_x509pki))
439
    {
440
      for (tail = trustfiles; !NILP (tail); tail = Fcdr (tail))
441
	{
442 443 444 445 446 447 448 449 450
	  Lisp_Object trustfile = Fcar (tail);
          if (STRINGP (trustfile))
            {
              GNUTLS_LOG2 (1, max_log_level, "setting the trustfile: ",
                           SDATA (trustfile));
              ret = gnutls_certificate_set_x509_trust_file
                (x509_cred,
                 SDATA (trustfile),
                 file_format);
451

452 453 454 455 456 457 458 459 460
              if (ret < GNUTLS_E_SUCCESS)
                return gnutls_make_error (ret);
            }
          else
            {
              error ("Sorry, GnuTLS can't use non-string trustfile %s",
                     trustfile);
            }
        }
Ted Zlatanov's avatar
Ted Zlatanov committed
461

462
      for (tail = keyfiles; !NILP (tail); tail = Fcdr (tail))
463
	{
464 465 466 467 468 469 470 471 472
	  Lisp_Object keyfile = Fcar (tail);
          if (STRINGP (keyfile))
            {
              GNUTLS_LOG2 (1, max_log_level, "setting the keyfile: ",
                           SDATA (keyfile));
              ret = gnutls_certificate_set_x509_crl_file
                (x509_cred,
                 SDATA (keyfile),
                 file_format);
473

474 475 476 477 478 479 480 481 482
              if (ret < GNUTLS_E_SUCCESS)
                return gnutls_make_error (ret);
            }
          else
            {
              error ("Sorry, GnuTLS can't use non-string keyfile %s",
                     keyfile);
            }
        }
483
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
484 485 486

  GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_FILES;

487 488
  GNUTLS_LOG (1, max_log_level, "gnutls_init");

Ted Zlatanov's avatar
Ted Zlatanov committed
489 490 491
  ret = gnutls_init (&state, GNUTLS_CLIENT);

  if (ret < GNUTLS_E_SUCCESS)
492
    return gnutls_make_error (ret);
Ted Zlatanov's avatar
Ted Zlatanov committed
493 494 495 496 497

  XPROCESS (proc)->gnutls_state = state;

  GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_INIT;

498 499
  if (STRINGP (priority_string))
    {
500
      priority_string_ptr = SSDATA (priority_string);
501 502 503 504 505 506 507 508
      GNUTLS_LOG2 (1, max_log_level, "got non-default priority string:",
                   priority_string_ptr);
    }
  else
    {
      GNUTLS_LOG2 (1, max_log_level, "using default priority string:",
                   priority_string_ptr);
    }
509

510 511
  GNUTLS_LOG (1, max_log_level, "setting the priority string");

512
  ret = gnutls_priority_set_direct (state,
513
				    priority_string_ptr,
514
				    NULL);
Ted Zlatanov's avatar
Ted Zlatanov committed
515 516

  if (ret < GNUTLS_E_SUCCESS)
517
    return gnutls_make_error (ret);
Ted Zlatanov's avatar
Ted Zlatanov committed
518 519 520 521

  GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_PRIORITY;

  if (EQ (type, Qgnutls_x509pki))
522
    {
Ted Zlatanov's avatar
Ted Zlatanov committed
523
      ret = gnutls_cred_set (state, GNUTLS_CRD_CERTIFICATE, x509_cred);
524
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
525
  else if (EQ (type, Qgnutls_anon))
526
    {
Ted Zlatanov's avatar
Ted Zlatanov committed
527
      ret = gnutls_cred_set (state, GNUTLS_CRD_ANON, anon_cred);
528
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
529
  else
530
    {
Ted Zlatanov's avatar
Ted Zlatanov committed
531 532
      error ("unknown credential type");
      ret = GNUTLS_EMACS_ERROR_INVALID_TYPE;
533
    }
Ted Zlatanov's avatar
Ted Zlatanov committed
534 535

  if (ret < GNUTLS_E_SUCCESS)
536
    return gnutls_make_error (ret);
Ted Zlatanov's avatar
Ted Zlatanov committed
537

538 539
  XPROCESS (proc)->gnutls_anon_cred = anon_cred;
  XPROCESS (proc)->gnutls_x509_cred = x509_cred;
Ted Zlatanov's avatar
Ted Zlatanov committed
540 541 542 543
  XPROCESS (proc)->gnutls_cred_type = type;

  GNUTLS_INITSTAGE (proc) = GNUTLS_STAGE_CRED_SET;

544 545
  emacs_gnutls_handshake (XPROCESS (proc));

Ted Zlatanov's avatar
Ted Zlatanov committed
546 547 548 549 550
  return gnutls_make_error (GNUTLS_E_SUCCESS);
}

DEFUN ("gnutls-bye", Fgnutls_bye,
       Sgnutls_bye, 2, 2, 0,
551
       doc: /* Terminate current GnuTLS connection for process PROC.
Ted Zlatanov's avatar
Ted Zlatanov committed
552 553 554
The connection should have been initiated using `gnutls-handshake'.

If CONT is not nil the TLS connection gets terminated and further
555
receives and sends will be disallowed.  If the return value is zero you
Ted Zlatanov's avatar
Ted Zlatanov committed
556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591
may continue using the connection.  If CONT is nil, GnuTLS actually
sends an alert containing a close request and waits for the peer to
reply with the same message.  In order to reuse the connection you
should wait for an EOF from the peer.

This function may also return `gnutls-e-again', or
`gnutls-e-interrupted'.  */)
    (Lisp_Object proc, Lisp_Object cont)
{
  gnutls_session_t state;
  int ret;

  CHECK_PROCESS (proc);

  state = XPROCESS (proc)->gnutls_state;

  ret = gnutls_bye (state,
                    NILP (cont) ? GNUTLS_SHUT_RDWR : GNUTLS_SHUT_WR);

  return gnutls_make_error (ret);
}

void
syms_of_gnutls (void)
{
  global_initialized = 0;

  Qgnutls_code = intern_c_string ("gnutls-code");
  staticpro (&Qgnutls_code);

  Qgnutls_anon = intern_c_string ("gnutls-anon");
  staticpro (&Qgnutls_anon);

  Qgnutls_x509pki = intern_c_string ("gnutls-x509pki");
  staticpro (&Qgnutls_x509pki);

592
  Qgnutls_bootprop_priority = intern_c_string (":priority");
593 594
  staticpro (&Qgnutls_bootprop_priority);

595
  Qgnutls_bootprop_trustfiles = intern_c_string (":trustfiles");
596 597
  staticpro (&Qgnutls_bootprop_trustfiles);

598
  Qgnutls_bootprop_keyfiles = intern_c_string (":keyfiles");
599 600
  staticpro (&Qgnutls_bootprop_keyfiles);

601
  Qgnutls_bootprop_callbacks = intern_c_string (":callbacks");
602 603
  staticpro (&Qgnutls_bootprop_callbacks);

604
  Qgnutls_bootprop_loglevel = intern_c_string (":loglevel");
605 606
  staticpro (&Qgnutls_bootprop_loglevel);

Ted Zlatanov's avatar
Ted Zlatanov committed
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
  Qgnutls_e_interrupted = intern_c_string ("gnutls-e-interrupted");
  staticpro (&Qgnutls_e_interrupted);
  Fput (Qgnutls_e_interrupted, Qgnutls_code,
        make_number (GNUTLS_E_INTERRUPTED));

  Qgnutls_e_again = intern_c_string ("gnutls-e-again");
  staticpro (&Qgnutls_e_again);
  Fput (Qgnutls_e_again, Qgnutls_code,
        make_number (GNUTLS_E_AGAIN));

  Qgnutls_e_invalid_session = intern_c_string ("gnutls-e-invalid-session");
  staticpro (&Qgnutls_e_invalid_session);
  Fput (Qgnutls_e_invalid_session, Qgnutls_code,
        make_number (GNUTLS_E_INVALID_SESSION));

  Qgnutls_e_not_ready_for_handshake =
    intern_c_string ("gnutls-e-not-ready-for-handshake");
  staticpro (&Qgnutls_e_not_ready_for_handshake);
  Fput (Qgnutls_e_not_ready_for_handshake, Qgnutls_code,
        make_number (GNUTLS_E_APPLICATION_ERROR_MIN));

  defsubr (&Sgnutls_get_initstage);
  defsubr (&Sgnutls_errorp);
  defsubr (&Sgnutls_error_fatalp);
  defsubr (&Sgnutls_error_string);
  defsubr (&Sgnutls_boot);
  defsubr (&Sgnutls_deinit);
  defsubr (&Sgnutls_bye);
}
#endif