ssh.c

/***************************************************************************
*                                  _   _ ____  _
*  Project                     ___| | | |  _ \| |
*                             / __| | | | |_) | |
*                            | (__| |_| |  _ <| |___
*                             \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2007, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/

/* #define CURL_LIBSSH2_DEBUG */

#include "setup.h"

#ifdef USE_LIBSSH2
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <limits.h>

#include <libssh2.h>
#include <libssh2_sftp.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#ifdef HAVE_TIME_H
#include <time.h>
#endif

#ifndef WIN32
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_UTSNAME_H
#include <sys/utsname.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef  VMS
#include <in.h>
#include <inet.h>
#endif
#endif /* !WIN32 */

#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
#undef in_addr_t
#define in_addr_t unsigned long
#endif

#include <curl/curl.h>
#include "urldata.h"
#include "sendf.h"
#include "easyif.h" /* for Curl_convert_... prototypes */

#include "if2ip.h"
#include "hostip.h"
#include "progress.h"
#include "transfer.h"
#include "escape.h"
#include "http.h" /* for HTTP proxy tunnel stuff */
#include "ssh.h"
#include "url.h"
#include "speedcheck.h"
#include "getinfo.h"

#include "strtoofft.h"
#include "strequal.h"
#include "sslgen.h"
#include "connect.h"
#include "strerror.h"
#include "memory.h"
#include "inet_ntop.h"
#include "select.h"
#include "parsedate.h" /* for the week day and month names */
#include "sockaddr.h" /* required for Curl_sockaddr_storage */
#include "multiif.h"

#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
#include "inet_ntoa_r.h"
#endif

#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>

#if defined(WIN32) || defined(MSDOS) || defined(__EMX__)
#define DIRSEP '\\'
#else
#define DIRSEP '/'
#endif

#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>

/* The last #include file should be: */
#ifdef CURLDEBUG
#include "memdebug.h"
#endif

#ifndef LIBSSH2_SFTP_S_IRUSR
/* Here's a work-around for those of you who happend to run a libssh2 version
   that is 0.14 or older. We should remove this kludge as soon as we can
   require a more recent libssh2 release. */
#ifndef S_IRGRP
#define S_IRGRP  0
#endif

#ifndef S_IROTH
#define S_IROTH 0
#endif

#define LIBSSH2_SFTP_S_IRUSR S_IRUSR
#define LIBSSH2_SFTP_S_IWUSR S_IWUSR
#define LIBSSH2_SFTP_S_IRGRP S_IRGRP
#define LIBSSH2_SFTP_S_IROTH S_IROTH
#define LIBSSH2_SFTP_S_IRUSR S_IRUSR
#define LIBSSH2_SFTP_S_IWUSR S_IWUSR
#define LIBSSH2_SFTP_S_IRGRP S_IRGRP
#define LIBSSH2_SFTP_S_IROTH S_IROTH
#define LIBSSH2_SFTP_S_IFMT S_IFMT
#define LIBSSH2_SFTP_S_IFDIR S_IFDIR
#define LIBSSH2_SFTP_S_IFLNK S_IFLNK
#define LIBSSH2_SFTP_S_IFSOCK S_IFSOCK
#define LIBSSH2_SFTP_S_IFCHR S_IFCHR
#define LIBSSH2_SFTP_S_IFBLK S_IFBLK
#define LIBSSH2_SFTP_S_IXUSR S_IXUSR
#define LIBSSH2_SFTP_S_IWGRP S_IWGRP
#define LIBSSH2_SFTP_S_IXGRP S_IXGRP
#define LIBSSH2_SFTP_S_IWOTH S_IWOTH
#define LIBSSH2_SFTP_S_IXOTH S_IXOTH
#endif

/* Local functions: */
static const char *sftp_libssh2_strerror(unsigned long err);
static CURLcode sftp_sendquote(struct connectdata *conn,
                               struct curl_slist *quote);

static LIBSSH2_ALLOC_FUNC(libssh2_malloc);
static LIBSSH2_REALLOC_FUNC(libssh2_realloc);
static LIBSSH2_FREE_FUNC(libssh2_free);

static void
kbd_callback(const char *name, int name_len, const char *instruction,
             int instruction_len, int num_prompts,
             const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
             LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
             void **abstract)
{
  struct SSHPROTO *ssh = (struct SSHPROTO *)*abstract;

#ifdef CURL_LIBSSH2_DEBUG
  fprintf(stderr, "name=%s\n", name);
  fprintf(stderr, "name_len=%d\n", name_len);
  fprintf(stderr, "instruction=%s\n", instruction);
  fprintf(stderr, "instruction_len=%d\n", instruction_len);
  fprintf(stderr, "num_prompts=%d\n", num_prompts);
#else
  (void)name;
  (void)name_len;
  (void)instruction;
  (void)instruction_len;
#endif  /* CURL_LIBSSH2_DEBUG */
  if (num_prompts == 1) {
    responses[0].text = strdup(ssh->passwd);
    responses[0].length = strlen(ssh->passwd);
  }
  (void)prompts;
  (void)abstract;
} /* kbd_callback */

static CURLcode sftp_libssh2_error_to_CURLE(unsigned long err)
{
  if (err == LIBSSH2_FX_OK)