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Added support for libssh SSH SCP back-end

Browse Source 
libssh is an alternative library to libssh2.
https://www.libssh.org/

That patch set also introduces support for ECDSA
ed25519 keys, as well as gssapi authentication.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
This commit is contained in:
Nikos Mavrogiannopoulos 2017-10-23 13:49:23 +02:00 committed by Daniel Stenberg
parent 3973ee6a65
commit c92d2e14cf
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
13 changed files with 1626 additions and 198 deletions
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87
configure.ac
View File

@ -2716,8 +2716,15 @@ dnl Default to compiler & linker defaults for LIBSSH2 files & libraries.
OPT_LIBSSH2=off
AC_ARG_WITH(libssh2,dnl
AC_HELP_STRING([--with-libssh2=PATH],[Where to look for libssh2, PATH points to the LIBSSH2 installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--without-libssh2], [disable LIBSSH2]),
OPT_LIBSSH2=$withval)
AC_HELP_STRING([--with-libssh2], [enable LIBSSH2]),
OPT_LIBSSH2=$withval, OPT_LIBSSH2=no)
OPT_LIBSSH=off
AC_ARG_WITH(libssh,dnl
AC_HELP_STRING([--with-libssh=PATH],[Where to look for libssh, PATH points to the LIBSSH installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--with-libssh], [enable LIBSSH]),
OPT_LIBSSH=$withval, OPT_LIBSSH=no)
if test X"$OPT_LIBSSH2" != Xno; then
dnl backup the pre-libssh2 variables
@ -2792,6 +2799,79 @@ if test X"$OPT_LIBSSH2" != Xno; then
CPPFLAGS=$CLEANCPPFLAGS
LIBS=$CLEANLIBS
fi
elif test X"$OPT_LIBSSH" != Xno; then
dnl backup the pre-libssh variables
CLEANLDFLAGS="$LDFLAGS"
CLEANCPPFLAGS="$CPPFLAGS"
CLEANLIBS="$LIBS"
case "$OPT_LIBSSH" in
yes)
dnl --with-libssh (without path) used
CURL_CHECK_PKGCONFIG(libssh)
if test "$PKGCONFIG" != "no" ; then
LIB_SSH=`$PKGCONFIG --libs-only-l libssh`
LD_SSH=`$PKGCONFIG --libs-only-L libssh`
CPP_SSH=`$PKGCONFIG --cflags-only-I libssh`
version=`$PKGCONFIG --modversion libssh`
DIR_SSH=`echo $LD_SSH | $SED -e 's/-L//'`
fi
;;
off)
dnl no --with-libssh option given, just check default places
;;
*)
dnl use the given --with-libssh spot
PREFIX_SSH=$OPT_LIBSSH
;;
esac
dnl if given with a prefix, we set -L and -I based on that
if test -n "$PREFIX_SSH"; then
LIB_SSH="-lssh"
LD_SSH=-L${PREFIX_SSH}/lib$libsuff
CPP_SSH=-I${PREFIX_SSH}/include
DIR_SSH=${PREFIX_SSH;}/lib$libsuff
fi
LDFLAGS="$LDFLAGS $LD_SSH"
CPPFLAGS="$CPPFLAGS $CPP_SSH"
LIBS="$LIB_SSH $LIBS"
AC_CHECK_LIB(ssh, ssh_new)
AC_CHECK_HEADERS(libssh/libssh.h,
curl_ssh_msg="enabled (libSSH)"
LIBSSH_ENABLED=1
AC_DEFINE(USE_LIBSSH, 1, [if libSSH is in use])
AC_SUBST(USE_LIBSSH, [1])
)
if test X"$OPT_LIBSSH" != Xoff &&
test "$LIBSSH_ENABLED" != "1"; then
AC_MSG_ERROR([libSSH libs and/or directories were not found where specified!])
fi
if test "$LIBSSH_ENABLED" = "1"; then
if test -n "$DIR_SSH"; then
dnl when the libssh shared libs were found in a path that the run-time
dnl linker doesn't search through, we need to add it to LD_LIBRARY_PATH
dnl to prevent further configure tests to fail due to this
if test "x$cross_compiling" != "xyes"; then
LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$DIR_SSH"
export LD_LIBRARY_PATH
AC_MSG_NOTICE([Added $DIR_SSH to LD_LIBRARY_PATH])
fi
fi
else
dnl no libssh, revert back to clean variables
LDFLAGS=$CLEANLDFLAGS
CPPFLAGS=$CLEANCPPFLAGS
LIBS=$CLEANLIBS
fi
fi
dnl **********************************************************************
@ -4009,6 +4089,9 @@ if test "x$USE_LIBSSH2" = "x1"; then
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SFTP"
fi
if test "x$USE_LIBSSH" = "x1"; then
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
fi
if test "x$CURL_DISABLE_RTSP" != "x1"; then
SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS RTSP"
fi

5
include/curl/curl.h
View File

@ -715,6 +715,7 @@ typedef enum {
#define CURLSSH_AUTH_HOST (1<<2) /* host key files */
#define CURLSSH_AUTH_KEYBOARD (1<<3) /* keyboard interactive */
#define CURLSSH_AUTH_AGENT (1<<4) /* agent (ssh-agent, pageant...) */
#define CURLSSH_AUTH_GSSAPI (1<<5) /* gssapi (kerberos, ...) */
#define CURLSSH_AUTH_DEFAULT CURLSSH_AUTH_ANY
#define CURLGSSAPI_DELEGATION_NONE 0 /* no delegation (default) */
@ -727,7 +728,9 @@ enum curl_khtype {
CURLKHTYPE_UNKNOWN,
CURLKHTYPE_RSA1,
CURLKHTYPE_RSA,
CURLKHTYPE_DSS
CURLKHTYPE_DSS,
CURLKHTYPE_ECDSA,
CURLKHTYPE_ED25519
};
struct curl_khkey {

7
lib/Makefile.inc
View File

@ -46,7 +46,7 @@ LIB_CFILES = file.c timeval.c base64.c hostip.c progress.c formdata.c \
http_digest.c md4.c md5.c http_negotiate.c inet_pton.c strtoofft.c \
strerror.c amigaos.c hostasyn.c hostip4.c hostip6.c hostsyn.c \
inet_ntop.c parsedate.c select.c tftp.c splay.c strdup.c socks.c \
ssh.c curl_addrinfo.c socks_gssapi.c socks_sspi.c \
ssh.c ssh-libssh.c curl_addrinfo.c socks_gssapi.c socks_sspi.c \
curl_sspi.c slist.c nonblock.c curl_memrchr.c imap.c pop3.c smtp.c \
pingpong.c rtsp.c curl_threads.c warnless.c hmac.c curl_rtmp.c \
openldap.c curl_gethostname.c gopher.c idn_win32.c \
@ -54,7 +54,7 @@ LIB_CFILES = file.c timeval.c base64.c hostip.c progress.c formdata.c \
http_ntlm.c curl_ntlm_wb.c curl_ntlm_core.c curl_sasl.c rand.c \
curl_multibyte.c hostcheck.c conncache.c pipeline.c dotdot.c \
x509asn1.c http2.c smb.c curl_endian.c curl_des.c system_win32.c \
mime.c sha256.c setopt.c
mime.c sha256.c setopt.c curl_path.c
LIB_HFILES = arpa_telnet.h netrc.h file.h timeval.h hostip.h progress.h \
formdata.h cookie.h http.h sendf.h ftp.h url.h dict.h if2ip.h \
@ -73,7 +73,8 @@ LIB_HFILES = arpa_telnet.h netrc.h file.h timeval.h hostip.h progress.h \
curl_sasl.h curl_multibyte.h hostcheck.h conncache.h \
curl_setup_once.h multihandle.h setup-vms.h pipeline.h dotdot.h \
x509asn1.h http2.h sigpipe.h smb.h curl_endian.h curl_des.h \
curl_printf.h system_win32.h rand.h mime.h curl_sha256.h setopt.h
curl_printf.h system_win32.h rand.h mime.h curl_sha256.h setopt.h \
curl_path.h
LIB_RCFILES = libcurl.rc

179
lib/curl_path.c Normal file
View File

@ -0,0 +1,179 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, 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 https://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.
*
***************************************************************************/
#include "curl_setup.h"
#include <curl/curl.h>
#include "curl_memory.h"
#include "curl_path.h"
#include "escape.h"
#include "memdebug.h"
/* figure out the path to work with in this particular request */
CURLcode Curl_getworkingpath(struct connectdata *conn,
char *homedir, /* when SFTP is used */
char **path) /* returns the allocated
real path to work with */
{
struct Curl_easy *data = conn->data;
char *real_path = NULL;
char *working_path;
size_t working_path_len;
CURLcode result =
Curl_urldecode(data, data->state.path, 0, &working_path,
&working_path_len, FALSE);
if(result)
return result;
/* Check for /~/, indicating relative to the user's home directory */
if(conn->handler->protocol & CURLPROTO_SCP) {
real_path = malloc(working_path_len + 1);
if(real_path == NULL) {
free(working_path);
return CURLE_OUT_OF_MEMORY;
}
if((working_path_len > 3) && (!memcmp(working_path, "/~/", 3)))
/* It is referenced to the home directory, so strip the leading '/~/' */
memcpy(real_path, working_path + 3, 4 + working_path_len-3);
else
memcpy(real_path, working_path, 1 + working_path_len);
}
else if(conn->handler->protocol & CURLPROTO_SFTP) {
if((working_path_len > 1) && (working_path[1] == '~')) {
size_t homelen = strlen(homedir);
real_path = malloc(homelen + working_path_len + 1);
if(real_path == NULL) {
free(working_path);
return CURLE_OUT_OF_MEMORY;
}
/* It is referenced to the home directory, so strip the
leading '/' */
memcpy(real_path, homedir, homelen);
real_path[homelen] = '/';
real_path[homelen + 1] = '\0';
if(working_path_len > 3) {
memcpy(real_path + homelen + 1, working_path + 3,
1 + working_path_len -3);
}
}
else {
real_path = malloc(working_path_len + 1);
if(real_path == NULL) {
free(working_path);
return CURLE_OUT_OF_MEMORY;
}
memcpy(real_path, working_path, 1 + working_path_len);
}
}
free(working_path);
/* store the pointer for the caller to receive */
*path = real_path;
return CURLE_OK;
}
/* The get_pathname() function is being borrowed from OpenSSH sftp.c
version 4.6p1. */
/*
* Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
CURLcode Curl_get_pathname(const char **cpp, char **path)
{
const char *cp = *cpp, *end;
char quot;
unsigned int i, j;
static const char WHITESPACE[] = " \t\r\n";
cp += strspn(cp, WHITESPACE);
if(!*cp) {
*cpp = cp;
*path = NULL;
return CURLE_QUOTE_ERROR;
}
*path = malloc(strlen(cp) + 1);
if(*path == NULL)
return CURLE_OUT_OF_MEMORY;
/* Check for quoted filenames */
if(*cp == '\"' || *cp == '\'') {
quot = *cp++;
/* Search for terminating quote, unescape some chars */
for(i = j = 0; i <= strlen(cp); i++) {
if(cp[i] == quot) { /* Found quote */
i++;
(*path)[j] = '\0';
break;
}
if(cp[i] == '\0') { /* End of string */
/*error("Unterminated quote");*/
goto fail;
}
if(cp[i] == '\\') { /* Escaped characters */
i++;
if(cp[i] != '\'' && cp[i] != '\"' &&
cp[i] != '\\') {
/*error("Bad escaped character '\\%c'",
cp[i]);*/
goto fail;
}
}
(*path)[j++] = cp[i];
}
if(j == 0) {
/*error("Empty quotes");*/
goto fail;
}
*cpp = cp + i + strspn(cp + i, WHITESPACE);
}
else {
/* Read to end of filename */
end = strpbrk(cp, WHITESPACE);
if(end == NULL)
end = strchr(cp, '\0');
*cpp = end + strspn(end, WHITESPACE);
memcpy(*path, cp, end - cp);
(*path)[end - cp] = '\0';
}
return CURLE_OK;
fail:
Curl_safefree(*path);
return CURLE_QUOTE_ERROR;
}

45
lib/curl_path.h Normal file
View File

@ -0,0 +1,45 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, 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 https://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.
*
***************************************************************************/
#include "curl_setup.h"
#include <curl/curl.h>
#include "urldata.h"
#ifdef WIN32
# undef PATH_MAX
# define PATH_MAX MAX_PATH
# ifndef R_OK
# define R_OK 4
# endif
#endif
#ifndef PATH_MAX
#define PATH_MAX 1024 /* just an extra precaution since there are systems that
have their definition hidden well */
#endif
CURLcode Curl_getworkingpath(struct connectdata *conn,
char *homedir,
char **path);
CURLcode
Curl_get_pathname(const char **cpp, char **path);

11
lib/easy.c
View File

@ -253,6 +253,13 @@ static CURLcode global_init(long flags, bool memoryfuncs)
}
#endif
#if defined(USE_LIBSSH)
if(ssh_init()) {
DEBUGF(fprintf(stderr, "Error: libssh_init failed\n"));
return CURLE_FAILED_INIT;
}
#endif
if(flags & CURL_GLOBAL_ACK_EINTR)
Curl_ack_eintr = 1;
@ -330,6 +337,10 @@ void curl_global_cleanup(void)
(void)libssh2_exit();
#endif
#if defined(USE_LIBSSH)
(void)ssh_finalize();
#endif
init_flags = 0;
}

3
lib/setopt.c
View File

@ -2110,7 +2110,7 @@ static CURLcode setopt(struct Curl_easy *data, CURLoption option,
data->set.proxy_ssl.primary.sessionid = data->set.ssl.primary.sessionid;
break;
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH2) || defined(USE_LIBSSH)
/* we only include SSH options if explicitly built to support SSH */
case CURLOPT_SSH_AUTH_TYPES:
data->set.ssh_auth_types = va_arg(param, long);
@ -2161,7 +2161,6 @@ static CURLcode setopt(struct Curl_easy *data, CURLoption option,
data->set.ssh_keyfunc_userp = va_arg(param, void *);
break;
#endif /* HAVE_LIBSSH2_KNOWNHOST_API */
#endif /* USE_LIBSSH2 */
case CURLOPT_HTTP_TRANSFER_DECODING:

1234
lib/ssh-libssh.c Normal file
View File

File diff suppressed because it is too large Load Diff

183
lib/ssh.c
View File

@ -87,21 +87,9 @@
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "curl_path.h"
#include "memdebug.h"
#ifdef WIN32
# undef PATH_MAX
# define PATH_MAX MAX_PATH
# ifndef R_OK
# define R_OK 4
# endif
#endif
#ifndef PATH_MAX
#define PATH_MAX 1024 /* just an extra precaution since there are systems that
have their definition hidden well */
#endif
#if LIBSSH2_VERSION_NUM >= 0x010206
/* libssh2_sftp_statvfs and friends were added in 1.2.6 */
#define HAS_STATVFS_SUPPORT 1
@ -120,16 +108,10 @@ static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc);
static LIBSSH2_REALLOC_FUNC(my_libssh2_realloc);
static LIBSSH2_FREE_FUNC(my_libssh2_free);
static CURLcode get_pathname(const char **cpp, char **path);
static CURLcode ssh_connect(struct connectdata *conn, bool *done);
static CURLcode ssh_multi_statemach(struct connectdata *conn, bool *done);
static CURLcode ssh_do(struct connectdata *conn, bool *done);
static CURLcode ssh_getworkingpath(struct connectdata *conn,
char *homedir, /* when SFTP is used */
char **path);
static CURLcode scp_done(struct connectdata *conn,
CURLcode, bool premature);
static CURLcode scp_doing(struct connectdata *conn,
@ -410,70 +392,6 @@ static void state(struct connectdata *conn, sshstate nowstate)
sshc->state = nowstate;
}
/* figure out the path to work with in this particular request */
static CURLcode ssh_getworkingpath(struct connectdata *conn,
char *homedir, /* when SFTP is used */
char **path) /* returns the allocated
real path to work with */
{
struct Curl_easy *data = conn->data;
char *real_path = NULL;
char *working_path;
size_t working_path_len;
CURLcode result =
Curl_urldecode(data, data->state.path, 0, &working_path,
&working_path_len, FALSE);
if(result)
return result;
/* Check for /~/, indicating relative to the user's home directory */
if(conn->handler->protocol & CURLPROTO_SCP) {
real_path = malloc(working_path_len + 1);
if(real_path == NULL) {
free(working_path);
return CURLE_OUT_OF_MEMORY;
}
if((working_path_len > 3) && (!memcmp(working_path, "/~/", 3)))
/* It is referenced to the home directory, so strip the leading '/~/' */
memcpy(real_path, working_path + 3, 4 + working_path_len-3);
else
memcpy(real_path, working_path, 1 + working_path_len);
}
else if(conn->handler->protocol & CURLPROTO_SFTP) {
if((working_path_len > 1) && (working_path[1] == '~')) {
size_t homelen = strlen(homedir);
real_path = malloc(homelen + working_path_len + 1);
if(real_path == NULL) {
free(working_path);
return CURLE_OUT_OF_MEMORY;
}
/* It is referenced to the home directory, so strip the
leading '/' */
memcpy(real_path, homedir, homelen);
real_path[homelen] = '/';
real_path[homelen + 1] = '\0';
if(working_path_len > 3) {
memcpy(real_path + homelen + 1, working_path + 3,
1 + working_path_len -3);
}
}
else {
real_path = malloc(working_path_len + 1);
if(real_path == NULL) {
free(working_path);
return CURLE_OUT_OF_MEMORY;
}
memcpy(real_path, working_path, 1 + working_path_len);
}
}
free(working_path);
/* store the pointer for the caller to receive */
*path = real_path;
return CURLE_OK;
}
#ifdef HAVE_LIBSSH2_KNOWNHOST_API
static int sshkeycallback(struct Curl_easy *easy,
@ -1184,7 +1102,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
case SSH_SFTP_QUOTE_INIT:
result = ssh_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
if(result) {
sshc->actualcode = result;
state(conn, SSH_STOP);
@ -1279,7 +1197,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
* also, every command takes at least one argument so we get that
* first argument right now
*/
result = get_pathname(&cp, &sshc->quote_path1);
result = Curl_get_pathname(&cp, &sshc->quote_path1);
if(result) {
if(result == CURLE_OUT_OF_MEMORY)
failf(data, "Out of memory");
@ -1304,7 +1222,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
/* sshc->quote_path1 contains the mode to set */
/* get the destination */
result = get_pathname(&cp, &sshc->quote_path2);
result = Curl_get_pathname(&cp, &sshc->quote_path2);
if(result) {
if(result == CURLE_OUT_OF_MEMORY)
failf(data, "Out of memory");
@ -1326,7 +1244,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
/* symbolic linking */
/* sshc->quote_path1 is the source */
/* get the destination */
result = get_pathname(&cp, &sshc->quote_path2);
result = Curl_get_pathname(&cp, &sshc->quote_path2);
if(result) {
if(result == CURLE_OUT_OF_MEMORY)
failf(data, "Out of memory");
@ -1351,7 +1269,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
/* rename file */
/* first param is the source path */
/* second param is the dest. path */
result = get_pathname(&cp, &sshc->quote_path2);
result = Curl_get_pathname(&cp, &sshc->quote_path2);
if(result) {
if(result == CURLE_OUT_OF_MEMORY)
failf(data, "Out of memory");
@ -2399,7 +2317,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
break;
case SSH_SCP_TRANS_INIT:
result = ssh_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
result = Curl_getworkingpath(conn, sshc->homedir, &sftp_scp->path);
if(result) {
sshc->actualcode = result;
state(conn, SSH_STOP);
@ -3307,93 +3225,6 @@ static ssize_t sftp_recv(struct connectdata *conn, int sockindex,
return nread;
}
/* The get_pathname() function is being borrowed from OpenSSH sftp.c
version 4.6p1. */
/*
* Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
static CURLcode
get_pathname(const char **cpp, char **path)
{
const char *cp = *cpp, *end;
char quot;
unsigned int i, j;
static const char WHITESPACE[] = " \t\r\n";
cp += strspn(cp, WHITESPACE);
if(!*cp) {
*cpp = cp;
*path = NULL;
return CURLE_QUOTE_ERROR;
}
*path = malloc(strlen(cp) + 1);
if(*path == NULL)
return CURLE_OUT_OF_MEMORY;
/* Check for quoted filenames */
if(*cp == '\"' || *cp == '\'') {
quot = *cp++;
/* Search for terminating quote, unescape some chars */
for(i = j = 0; i <= strlen(cp); i++) {
if(cp[i] == quot) { /* Found quote */
i++;
(*path)[j] = '\0';
break;
}
if(cp[i] == '\0') { /* End of string */
/*error("Unterminated quote");*/
goto fail;
}
if(cp[i] == '\\') { /* Escaped characters */
i++;
if(cp[i] != '\'' && cp[i] != '\"' &&
cp[i] != '\\') {
/*error("Bad escaped character '\\%c'",
cp[i]);*/
goto fail;
}
}
(*path)[j++] = cp[i];
}
if(j == 0) {
/*error("Empty quotes");*/
goto fail;
}
*cpp = cp + i + strspn(cp + i, WHITESPACE);
}
else {
/* Read to end of filename */
end = strpbrk(cp, WHITESPACE);
if(end == NULL)
end = strchr(cp, '\0');
*cpp = end + strspn(end, WHITESPACE);
memcpy(*path, cp, end - cp);
(*path)[end - cp] = '\0';
}
return CURLE_OK;
fail:
Curl_safefree(*path);
return CURLE_QUOTE_ERROR;
}
static const char *sftp_libssh2_strerror(int err)
{
switch(err) {

48
lib/ssh.h
View File

@ -24,9 +24,11 @@
#include "curl_setup.h"
#ifdef HAVE_LIBSSH2_H
#if defined(HAVE_LIBSSH2_H)
#include <libssh2.h>
#include <libssh2_sftp.h>
#elif defined(HAVE_LIBSSH_LIBSSH_H)
#include <libssh/libssh.h>
#endif /* HAVE_LIBSSH2_H */
/****************************************************************************
@ -51,6 +53,7 @@ typedef enum {
SSH_AUTH_HOST,
SSH_AUTH_KEY_INIT,
SSH_AUTH_KEY,
SSH_AUTH_GSSAPI,
SSH_AUTH_DONE,
SSH_SFTP_INIT,
SSH_SFTP_REALPATH, /* Last state in SSH-CONNECT */
@ -86,6 +89,7 @@ typedef enum {
SSH_SCP_TRANS_INIT, /* First state in SCP-DO */
SSH_SCP_UPLOAD_INIT,
SSH_SCP_DOWNLOAD_INIT,
SSH_SCP_DOWNLOAD,
SSH_SCP_DONE,
SSH_SCP_SEND_EOF,
SSH_SCP_WAIT_EOF,
@ -109,7 +113,8 @@ struct SSHPROTO {
struct */
struct ssh_conn {
const char *authlist; /* List of auth. methods, managed by libssh2 */
#ifdef USE_LIBSSH2
/* common */
const char *passphrase; /* pass-phrase to use */
char *rsa_pub; /* path name */
char *rsa; /* path name */
@ -120,14 +125,11 @@ struct ssh_conn {
struct curl_slist *quote_item; /* for the quote option */
char *quote_path1; /* two generic pointers for the QUOTE stuff */
char *quote_path2;
LIBSSH2_SFTP_ATTRIBUTES quote_attrs; /* used by the SFTP_QUOTE state */
bool acceptfail; /* used by the SFTP_QUOTE (continue if
quote command fails) */
char *homedir; /* when doing SFTP we figure out home dir in the
connect phase */
/* Here's a set of struct members used by the SFTP_READDIR state */
LIBSSH2_SFTP_ATTRIBUTES readdir_attrs;
char *readdir_filename;
char *readdir_longentry;
int readdir_len, readdir_totalLen, readdir_currLen;
@ -139,11 +141,25 @@ struct ssh_conn {
second attempt has been made to change
to/create a directory */
char *slash_pos; /* used by the SFTP_CREATE_DIRS state */
int orig_waitfor; /* default READ/WRITE bits wait for */
#if defined(USE_LIBSSH)
/* our variables */
ssh_key privkey;
ssh_key pubkey;
int auth_methods;
ssh_session ssh_session;
ssh_scp scp_session;
#elif defined(USE_LIBSSH2)
LIBSSH2_SFTP_ATTRIBUTES quote_attrs; /* used by the SFTP_QUOTE state */
/* Here's a set of struct members used by the SFTP_READDIR state */
LIBSSH2_SFTP_ATTRIBUTES readdir_attrs;
LIBSSH2_SESSION *ssh_session; /* Secure Shell session */
LIBSSH2_CHANNEL *ssh_channel; /* Secure Shell channel handle */
LIBSSH2_SFTP *sftp_session; /* SFTP handle */
LIBSSH2_SFTP_HANDLE *sftp_handle;
int orig_waitfor; /* default READ/WRITE bits wait for */
#ifdef HAVE_LIBSSH2_AGENT_API
LIBSSH2_AGENT *ssh_agent; /* proxy to ssh-agent/pageant */
@ -156,10 +172,16 @@ struct ssh_conn {
#ifdef HAVE_LIBSSH2_KNOWNHOST_API
LIBSSH2_KNOWNHOSTS *kh;
#endif
#endif /* USE_LIBSSH2 */
#endif /* USE_LIBSSH */
};
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH)
#define CURL_LIBSSH_VERSION ssh_version(0)
extern const struct Curl_handler Curl_handler_scp;
#elif defined(USE_LIBSSH2)
/* Feature detection based on version numbers to better work with
non-configure platforms */
@ -190,6 +212,14 @@ struct ssh_conn {
#define HAVE_LIBSSH2_SESSION_HANDSHAKE 1
#endif
#ifdef HAVE_LIBSSH2_VERSION
/* get it run-time if possible */
#define CURL_LIBSSH2_VERSION libssh2_version(0)
#else
/* use build-time if run-time not possible */
#define CURL_LIBSSH2_VERSION LIBSSH2_VERSION
#endif
extern const struct Curl_handler Curl_handler_scp;
extern const struct Curl_handler Curl_handler_sftp;

5
lib/url.c
View File

@ -196,8 +196,11 @@ static const struct Curl_handler * const protocols[] = {
&Curl_handler_tftp,
#endif
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH2) || defined(USE_LIBSSH)
&Curl_handler_scp,
#endif
#if defined(USE_LIBSSH2)
&Curl_handler_sftp,
#endif

2
lib/urldata.h
View File

@ -1410,7 +1410,7 @@ enum dupstring {
STRING_RTSP_SESSION_ID, /* Session ID to use */
STRING_RTSP_STREAM_URI, /* Stream URI for this request */
STRING_RTSP_TRANSPORT, /* Transport for this session */
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH2) || defined(USE_LIBSSH)
STRING_SSH_PRIVATE_KEY, /* path to the private key file for auth */
STRING_SSH_PUBLIC_KEY, /* path to the public key file for auth */
STRING_SSH_HOST_PUBLIC_KEY_MD5, /* md5 of host public key in ascii hex */

15
lib/version.c
View File

@ -26,6 +26,7 @@
#include "urldata.h"
#include "vtls/vtls.h"
#include "http2.h"
#include "ssh.h"
#include "curl_printf.h"
#ifdef USE_ARES
@ -176,6 +177,11 @@ char *curl_version(void)
left -= len;
ptr += len;
#endif
#ifdef USE_LIBSSH
len = snprintf(ptr, left, " libssh/%s", CURL_LIBSSH_VERSION);
left -= len;
ptr += len;
#endif
#ifdef USE_NGHTTP2
len = Curl_http2_ver(ptr, left);
left -= len;
@ -264,7 +270,7 @@ static const char * const protocols[] = {
#ifndef CURL_DISABLE_RTSP
"rtsp",
#endif
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH) || defined(USE_LIBSSH2)
"scp",
#endif
#ifdef USE_LIBSSH2
@ -379,7 +385,7 @@ static curl_version_info_data version_info = {
curl_version_info_data *curl_version_info(CURLversion stamp)
{
static bool initialized;
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH) || defined(USE_LIBSSH2)
static char ssh_buffer[80];
#endif
#ifdef USE_SSL
@ -431,9 +437,12 @@ curl_version_info_data *curl_version_info(CURLversion stamp)
#endif /* _LIBICONV_VERSION */
#endif
#ifdef USE_LIBSSH2
#if defined(USE_LIBSSH2)
snprintf(ssh_buffer, sizeof(ssh_buffer), "libssh2/%s", LIBSSH2_VERSION);
version_info.libssh_version = ssh_buffer;
#elif defined(USE_LIBSSH)
snprintf(ssh_buffer, sizeof(ssh_buffer), "libssh/%s", CURL_LIBSSH_VERSION);
version_info.libssh_version = ssh_buffer;
#endif
#ifdef HAVE_BROTLI