This file is indexed.

/usr/include/libssh/libsshpp.hpp is in libssh-gcrypt-dev 0.8.0~20170825.94fa1e38-1build1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
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
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
/*
 * This file is part of the SSH Library
 *
 * Copyright (c) 2010 by Aris Adamantiadis
 *
 * This library 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.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef LIBSSHPP_HPP_
#define LIBSSHPP_HPP_

/**
 * @defgroup ssh_cpp The libssh C++ wrapper
 *
 * The C++ bindings for libssh are completely embedded in a single .hpp file, and
 * this for two reasons:
 * - C++ is hard to keep binary compatible, C is easy. We try to keep libssh C version
 *   as much as possible binary compatible between releases, while this would be hard for
 *   C++. If you compile your program with these headers, you will only link to the C version
 *   of libssh which will be kept ABI compatible. No need to recompile your C++ program
 *   each time a new binary-compatible version of libssh is out
 * - Most of the functions in this file are really short and are probably worth the "inline"
 *   linking mode, which the compiler can decide to do in some case. There would be nearly no
 *   performance penalty of using the wrapper rather than native calls.
 *
 * Please visit the documentation of ssh::Session and ssh::Channel
 * @see ssh::Session
 * @see ssh::Channel
 *
 * If you wish not to use C++ exceptions, please define SSH_NO_CPP_EXCEPTIONS:
 * @code
 * #define SSH_NO_CPP_EXCEPTIONS
 * #include <libssh/libsshpp.hpp>
 * @endcode
 * All functions will then return SSH_ERROR in case of error.
 * @{
 */

/* do not use deprecated functions */
#define LIBSSH_LEGACY_0_4

#include <libssh/libssh.h>
#include <libssh/server.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string>

namespace ssh {

class Channel;
/** Some people do not like C++ exceptions. With this define, we give
 * the choice to use or not exceptions.
 * @brief if defined, disable C++ exceptions for libssh c++ wrapper
 */
#ifndef SSH_NO_CPP_EXCEPTIONS

/** @brief This class describes a SSH Exception object. This object can be thrown
 * by several SSH functions that interact with the network, and may fail because of
 * socket, protocol or memory errors.
 */
class SshException{
public:
  SshException(ssh_session csession){
    code=ssh_get_error_code(csession);
    description=std::string(ssh_get_error(csession));
  }
  SshException(const SshException &e){
    code=e.code;
    description=e.description;
  }
  /** @brief returns the Error code
   * @returns SSH_FATAL Fatal error happened (not recoverable)
   * @returns SSH_REQUEST_DENIED Request was denied by remote host
   * @see ssh_get_error_code
   */
  int getCode(){
    return code;
  }
  /** @brief returns the error message of the last exception
   * @returns pointer to a c string containing the description of error
   * @see ssh_get_error
   */
  std::string getError(){
    return description;
  }
private:
  int code;
  std::string description;
};

/** @internal
 * @brief Macro to throw exception if there was an error
 */
#define ssh_throw(x) if((x)==SSH_ERROR) throw SshException(getCSession())
#define ssh_throw_null(CSession,x) if((x)==NULL) throw SshException(CSession)
#define void_throwable void
#define return_throwable return

#else

/* No exception at all. All functions will return an error code instead
 * of an exception
 */
#define ssh_throw(x) if((x)==SSH_ERROR) return SSH_ERROR
#define ssh_throw_null(CSession,x) if((x)==NULL) return NULL
#define void_throwable int
#define return_throwable return SSH_OK
#endif

/**
 * The ssh::Session class contains the state of a SSH connection.
 */
class Session {
  friend class Channel;
public:
  Session(){
    c_session=ssh_new();
  }
  ~Session(){
    ssh_free(c_session);
    c_session=NULL;
  }
  /** @brief sets an SSH session options
   * @param type Type of option
   * @param option cstring containing the value of option
   * @throws SshException on error
   * @see ssh_options_set
   */
  void_throwable setOption(enum ssh_options_e type, const char *option){
    ssh_throw(ssh_options_set(c_session,type,option));
    return_throwable;
  }
  /** @brief sets an SSH session options
   * @param type Type of option
   * @param option long integer containing the value of option
   * @throws SshException on error
   * @see ssh_options_set
   */
  void_throwable setOption(enum ssh_options_e type, long int option){
    ssh_throw(ssh_options_set(c_session,type,&option));
    return_throwable;
  }
  /** @brief sets an SSH session options
   * @param type Type of option
   * @param option void pointer containing the value of option
   * @throws SshException on error
   * @see ssh_options_set
   */
  void_throwable setOption(enum ssh_options_e type, void *option){
    ssh_throw(ssh_options_set(c_session,type,option));
    return_throwable;
  }
  /** @brief connects to the remote host
   * @throws SshException on error
   * @see ssh_connect
   */
  void_throwable connect(){
    int ret=ssh_connect(c_session);
    ssh_throw(ret);
    return_throwable;
  }
  /** @brief Authenticates automatically using public key
   * @throws SshException on error
   * @returns SSH_AUTH_SUCCESS, SSH_AUTH_PARTIAL, SSH_AUTH_DENIED
   * @see ssh_userauth_autopubkey
   */
  int userauthPublickeyAuto(void){
    int ret=ssh_userauth_publickey_auto(c_session, NULL, NULL);
    ssh_throw(ret);
    return ret;
  }
  /** @brief Authenticates using the "none" method. Prefer using autopubkey if
   * possible.
   * @throws SshException on error
   * @returns SSH_AUTH_SUCCESS, SSH_AUTH_PARTIAL, SSH_AUTH_DENIED
   * @see ssh_userauth_none
   * @see Session::userauthAutoPubkey
   */
  int userauthNone(){
    int ret=ssh_userauth_none(c_session,NULL);
    ssh_throw(ret);
    return ret;
  }
  /** @brief Authenticates using the password method.
   * @param[in] password password to use for authentication
   * @throws SshException on error
   * @returns SSH_AUTH_SUCCESS, SSH_AUTH_PARTIAL, SSH_AUTH_DENIED
   * @see ssh_userauth_password
   */
  int userauthPassword(const char *password){
    int ret=ssh_userauth_password(c_session,NULL,password);
    ssh_throw(ret);
    return ret;
  }
  /** @brief Try to authenticate using the publickey method.
   * @param[in] pubkey public key to use for authentication
   * @throws SshException on error
   * @returns SSH_AUTH_SUCCESS if the pubkey is accepted,
   * @returns SSH_AUTH_DENIED if the pubkey is denied
   * @see ssh_userauth_try_pubkey
   */
  int userauthTryPublickey(ssh_key pubkey){
    int ret=ssh_userauth_try_publickey(c_session, NULL, pubkey);
    ssh_throw(ret);
    return ret;
  }
  /** @brief Authenticates using the publickey method.
   * @param[in] privkey private key to use for authentication
   * @throws SshException on error
   * @returns SSH_AUTH_SUCCESS, SSH_AUTH_PARTIAL, SSH_AUTH_DENIED
   * @see ssh_userauth_pubkey
   */
  int userauthPublickey(ssh_key privkey){
    int ret=ssh_userauth_publickey(c_session, NULL, privkey);
    ssh_throw(ret);
    return ret;
  }
  int userauthPrivatekeyFile(const char *filename,
      const char *passphrase);
  /** @brief Returns the available authentication methods from the server
   * @throws SshException on error
   * @returns Bitfield of available methods.
   * @see ssh_userauth_list
   */
  int getAuthList(){
    int ret=ssh_userauth_list(c_session, NULL);
    ssh_throw(ret);
    return ret;
  }
  /** @brief Disconnects from the SSH server and closes connection
   * @see ssh_disconnect
   */
  void disconnect(){
    ssh_disconnect(c_session);
  }
  /** @brief Returns the disconnect message from the server, if any
   * @returns pointer to the message, or NULL. Do not attempt to free
   * the pointer.
   */
  const char *getDisconnectMessage(){
    const char *msg=ssh_get_disconnect_message(c_session);
    return msg;
  }
  /** @internal
   * @brief gets error message
   */
  const char *getError(){
    return ssh_get_error(c_session);
  }
  /** @internal
   * @brief returns error code
   */
  int getErrorCode(){
    return ssh_get_error_code(c_session);
  }
  /** @brief returns the file descriptor used for the communication
   * @returns the file descriptor
   * @warning if a proxycommand is used, this function will only return
   * one of the two file descriptors being used
   * @see ssh_get_fd
   */
  socket_t getSocket(){
    return ssh_get_fd(c_session);
  }
  /** @brief gets the Issue banner from the ssh server
   * @returns the issue banner. This is generally a MOTD from server
   * @see ssh_get_issue_banner
   */
  std::string getIssueBanner(){
    char *banner=ssh_get_issue_banner(c_session);
    std::string ret= std::string(banner);
    ::free(banner);
    return ret;
  }
  /** @brief returns the OpenSSH version (server) if possible
   * @returns openssh version code
   * @see ssh_get_openssh_version
   */
  int getOpensshVersion(){
    return ssh_get_openssh_version(c_session);
  }
  /** @brief returns the version of the SSH protocol being used
   * @returns the SSH protocol version
   * @see ssh_get_version
   */
  int getVersion(){
    return ssh_get_version(c_session);
  }
  /** @brief verifies that the server is known
   * @throws SshException on error
   * @returns Integer value depending on the knowledge of the
   * server key
   * @see ssh_is_server_known
   */
  int isServerKnown(){
    int ret=ssh_is_server_known(c_session);
    ssh_throw(ret);
    return ret;
  }
  void log(int priority, const char *format, ...){
    char buffer[1024];
    va_list va;

    va_start(va, format);
    vsnprintf(buffer, sizeof(buffer), format, va);
    va_end(va);
    _ssh_log(priority, "libsshpp", "%s", buffer);
  }

  /** @brief copies options from a session to another
   * @throws SshException on error
   * @see ssh_options_copy
   */
  void_throwable optionsCopy(const Session &source){
    ssh_throw(ssh_options_copy(source.c_session,&c_session));
    return_throwable;
  }
  /** @brief parses a configuration file for options
   * @throws SshException on error
   * @param[in] file configuration file name
   * @see ssh_options_parse_config
   */
  void_throwable optionsParseConfig(const char *file){
    ssh_throw(ssh_options_parse_config(c_session,file));
    return_throwable;
  }
  /** @brief silently disconnect from remote host
   * @see ssh_silent_disconnect
   */
  void silentDisconnect(){
    ssh_silent_disconnect(c_session);
  }
  /** @brief Writes the known host file with current
   * host key
   * @throws SshException on error
   * @see ssh_write_knownhost
   */
  int writeKnownhost(){
    int ret = ssh_write_knownhost(c_session);
    ssh_throw(ret);
    return ret;
  }

  /** @brief accept an incoming forward connection
   * @param[in] timeout_ms timeout for waiting, in ms
   * @returns new Channel pointer on the forward connection
   * @returns NULL in case of error
   * @warning you have to delete this pointer after use
   * @see ssh_channel_forward_accept
   * @see Session::listenForward
   */
  inline Channel *acceptForward(int timeout_ms);
  /* implemented outside the class due Channel references */

  void_throwable cancelForward(const char *address, int port){
    int err=ssh_channel_cancel_forward(c_session, address, port);
    ssh_throw(err);
    return_throwable;
  }

  void_throwable listenForward(const char *address, int port,
      int &boundport){
    int err=ssh_channel_listen_forward(c_session, address, port, &boundport);
    ssh_throw(err);
    return_throwable;
  }

private:
  ssh_session c_session;
  ssh_session getCSession(){
    return c_session;
  }
  /* No copy constructor, no = operator */
  Session(const Session &);
  Session& operator=(const Session &);
};

/** @brief the ssh::Channel class describes the state of an SSH
 * channel.
 * @see ssh_channel
 */
class Channel {
  friend class Session;
public:
  Channel(Session &session){
    channel=ssh_channel_new(session.getCSession());
    this->session=&session;
  }
  ~Channel(){
    ssh_channel_free(channel);
    channel=NULL;
  }

  /** @brief accept an incoming X11 connection
   * @param[in] timeout_ms timeout for waiting, in ms
   * @returns new Channel pointer on the X11 connection
   * @returns NULL in case of error
   * @warning you have to delete this pointer after use
   * @see ssh_channel_accept_x11
   * @see Channel::requestX11
   */
  Channel *acceptX11(int timeout_ms){
    ssh_channel x11chan = ssh_channel_accept_x11(channel,timeout_ms);
    ssh_throw_null(getCSession(),x11chan);
    Channel *newchan = new Channel(getSession(),x11chan);
    return newchan;
  }
  /** @brief change the size of a pseudoterminal
   * @param[in] cols number of columns
   * @param[in] rows number of rows
   * @throws SshException on error
   * @see ssh_channel_change_pty_size
   */
  void_throwable changePtySize(int cols, int rows){
    int err=ssh_channel_change_pty_size(channel,cols,rows);
    ssh_throw(err);
    return_throwable;
  }

  /** @brief closes a channel
   * @throws SshException on error
   * @see ssh_channel_close
   */
  void_throwable close(){
    ssh_throw(ssh_channel_close(channel));
    return_throwable;
  }

  int getExitStatus(){
    return ssh_channel_get_exit_status(channel);
  }
  Session &getSession(){
    return *session;
  }
  /** @brief returns true if channel is in closed state
   * @see ssh_channel_is_closed
   */
  bool isClosed(){
    return ssh_channel_is_closed(channel) != 0;
  }
  /** @brief returns true if channel is in EOF state
   * @see ssh_channel_is_eof
   */
  bool isEof(){
    return ssh_channel_is_eof(channel) != 0;
  }
  /** @brief returns true if channel is in open state
   * @see ssh_channel_is_open
   */
  bool isOpen(){
    return ssh_channel_is_open(channel) != 0;
  }
  int openForward(const char *remotehost, int remoteport,
      const char *sourcehost=NULL, int localport=0){
    int err=ssh_channel_open_forward(channel,remotehost,remoteport,
        sourcehost, localport);
    ssh_throw(err);
    return err;
  }
  /* TODO: completely remove this ? */
  void_throwable openSession(){
    int err=ssh_channel_open_session(channel);
    ssh_throw(err);
    return_throwable;
  }
  int poll(bool is_stderr=false){
    int err=ssh_channel_poll(channel,is_stderr);
    ssh_throw(err);
    return err;
  }
  int read(void *dest, size_t count, bool is_stderr){
    int err;
    /* handle int overflow */
    if(count > 0x7fffffff)
      count = 0x7fffffff;
    err=ssh_channel_read_timeout(channel,dest,count,is_stderr,-1);
    ssh_throw(err);
    return err;
  }
  int read(void *dest, size_t count, int timeout){
    int err;
    /* handle int overflow */
    if(count > 0x7fffffff)
      count = 0x7fffffff;
    err=ssh_channel_read_timeout(channel,dest,count,false,timeout);
    ssh_throw(err);
    return err;
  }
  int read(void *dest, size_t count, bool is_stderr=false, int timeout=-1){
    int err;
    /* handle int overflow */
    if(count > 0x7fffffff)
      count = 0x7fffffff;
    err=ssh_channel_read_timeout(channel,dest,count,is_stderr,timeout);
    ssh_throw(err);
    return err;
  }
  int readNonblocking(void *dest, size_t count, bool is_stderr=false){
    int err;
    /* handle int overflow */
    if(count > 0x7fffffff)
      count = 0x7fffffff;
    err=ssh_channel_read_nonblocking(channel,dest,count,is_stderr);
    ssh_throw(err);
    return err;
  }
  void_throwable requestEnv(const char *name, const char *value){
    int err=ssh_channel_request_env(channel,name,value);
    ssh_throw(err);
    return_throwable;
  }

  void_throwable requestExec(const char *cmd){
    int err=ssh_channel_request_exec(channel,cmd);
    ssh_throw(err);
    return_throwable;
  }
  void_throwable requestPty(const char *term=NULL, int cols=0, int rows=0){
    int err;
    if(term != NULL && cols != 0 && rows != 0)
      err=ssh_channel_request_pty_size(channel,term,cols,rows);
    else
      err=ssh_channel_request_pty(channel);
    ssh_throw(err);
    return_throwable;
  }

  void_throwable requestShell(){
    int err=ssh_channel_request_shell(channel);
    ssh_throw(err);
    return_throwable;
  }
  void_throwable requestSendSignal(const char *signum){
    int err=ssh_channel_request_send_signal(channel, signum);
    ssh_throw(err);
    return_throwable;
  }
  void_throwable requestSubsystem(const char *subsystem){
    int err=ssh_channel_request_subsystem(channel,subsystem);
    ssh_throw(err);
    return_throwable;
  }
  int requestX11(bool single_connection,
      const char *protocol, const char *cookie, int screen_number){
    int err=ssh_channel_request_x11(channel,single_connection,
        protocol, cookie, screen_number);
    ssh_throw(err);
    return err;
  }
  void_throwable sendEof(){
    int err=ssh_channel_send_eof(channel);
    ssh_throw(err);
    return_throwable;
  }
  /** @brief Writes on a channel
   * @param data data to write.
   * @param len number of bytes to write.
   * @param is_stderr write should be done on the stderr channel (server only)
   * @returns number of bytes written
   * @throws SshException in case of error
   * @see channel_write
   * @see channel_write_stderr
   */
  int write(const void *data, size_t len, bool is_stderr=false){
    int ret;
    if(is_stderr){
      ret=ssh_channel_write_stderr(channel,data,len);
    } else {
      ret=ssh_channel_write(channel,data,len);
    }
    ssh_throw(ret);
    return ret;
  }
private:
  ssh_session getCSession(){
    return session->getCSession();
  }
  Channel (Session &session, ssh_channel c_channel){
    this->channel=c_channel;
    this->session=&session;
  }
  Session *session;
  ssh_channel channel;
  /* No copy and no = operator */
  Channel(const Channel &);
  Channel &operator=(const Channel &);
};


inline Channel *Session::acceptForward(int timeout_ms){
    ssh_channel forward =
        ssh_channel_accept_forward(c_session, timeout_ms, NULL);
    ssh_throw_null(c_session,forward);
    Channel *newchan = new Channel(*this,forward);
    return newchan;
  }

} // namespace ssh

/** @} */
#endif /* LIBSSHPP_HPP_ */