mirror of
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bf555ba621
NEED TO BE GENERATED* =) Refer to to entry "2001/01/16 19:20:06" for more details. 20010118 - (bal) Super Sized OpenBSD Resync - markus@cvs.openbsd.org 2001/01/11 22:14:20 GMT 2001 by markus [sshd.c] maxfd+1 - markus@cvs.openbsd.org 2001/01/13 17:59:18 [ssh-keygen.1] small ssh-keygen manpage cleanup; stevesk@pobox.com - markus@cvs.openbsd.org 2001/01/13 18:03:07 [scp.c ssh-keygen.c sshd.c] getopt() returns -1 not EOF; stevesk@pobox.com - markus@cvs.openbsd.org 2001/01/13 18:06:54 [ssh-keyscan.c] use SSH_DEFAULT_PORT; from stevesk@pobox.com - markus@cvs.openbsd.org 2001/01/13 18:12:47 [ssh-keyscan.c] free() -> xfree(); fix memory leak; from stevesk@pobox.com - markus@cvs.openbsd.org 2001/01/13 18:14:13 [ssh-add.c] typo, from stevesk@sweden.hp.com - markus@cvs.openbsd.org 2001/01/13 18:32:50 [packet.c session.c ssh.c sshconnect.c sshd.c] split out keepalive from packet_interactive (from dale@accentre.com) set IPTOS_LOWDELAY TCP_NODELAY IPTOS_THROUGHPUT for ssh2, too. - markus@cvs.openbsd.org 2001/01/13 18:36:45 [packet.c packet.h] reorder, typo - markus@cvs.openbsd.org 2001/01/13 18:38:00 [auth-options.c] fix comment - markus@cvs.openbsd.org 2001/01/13 18:43:31 [session.c] Wall - markus@cvs.openbsd.org 2001/01/13 19:14:08 [clientloop.h clientloop.c ssh.c] move callback to headerfile - markus@cvs.openbsd.org 2001/01/15 21:40:10 [ssh.c] use log() instead of stderr - markus@cvs.openbsd.org 2001/01/15 21:43:51 [dh.c] use error() not stderr! - markus@cvs.openbsd.org 2001/01/15 21:45:29 [sftp-server.c] rename must fail if newpath exists, debug off by default - markus@cvs.openbsd.org 2001/01/15 21:46:38 [sftp-server.c] readable long listing for sftp-server, ok deraadt@ - markus@cvs.openbsd.org 2001/01/16 19:20:06 [key.c ssh-rsa.c] make "ssh-rsa" key format for ssh2 confirm to the ietf-drafts; from galb@vandyke.com. note that you have to delete older ssh2-rsa keys, since they are in the wrong format, too. they must be removed from .ssh/authorized_keys2 and .ssh/known_hosts2, etc. (cd; grep -v ssh-rsa .ssh/authorized_keys2 > TMP && mv TMP .ssh/authorized_keys2) additionally, we now check that BN_num_bits(rsa->n) >= 768. - markus@cvs.openbsd.org 2001/01/16 20:54:27 [sftp-server.c] remove some statics. simpler handles; idea from nisse@lysator.liu.se - deraadt@cvs.openbsd.org 2001/01/16 23:58:08 [bufaux.c radix.c sshconnect.h sshconnect1.c] indent - (bal) Added bsd-strmode.[ch] since some non-OpenBSD platforms may be missing such feature.
1089 lines
21 KiB
C
1089 lines
21 KiB
C
/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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RCSID("$OpenBSD: sftp-server.c,v 1.13 2001/01/16 20:54:27 markus Exp $");
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#include "ssh.h"
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#include "buffer.h"
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#include "bufaux.h"
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#include "getput.h"
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#include "xmalloc.h"
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#include "sftp.h"
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/* helper */
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#define get_int64() buffer_get_int64(&iqueue);
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#define get_int() buffer_get_int(&iqueue);
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#define get_string(lenp) buffer_get_string(&iqueue, lenp);
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#define TRACE debug
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#ifdef HAVE___PROGNAME
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extern char *__progname;
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#else
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char *__progname;
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#endif
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/* input and output queue */
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Buffer iqueue;
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Buffer oqueue;
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/* portable attibutes, etc. */
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typedef struct Attrib Attrib;
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typedef struct Stat Stat;
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struct Attrib
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{
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u_int32_t flags;
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u_int64_t size;
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u_int32_t uid;
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u_int32_t gid;
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u_int32_t perm;
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u_int32_t atime;
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u_int32_t mtime;
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};
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struct Stat
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{
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char *name;
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char *long_name;
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Attrib attrib;
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};
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int
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errno_to_portable(int unixerrno)
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{
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int ret = 0;
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switch (unixerrno) {
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case 0:
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ret = SSH2_FX_OK;
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break;
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case ENOENT:
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case ENOTDIR:
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case EBADF:
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case ELOOP:
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ret = SSH2_FX_NO_SUCH_FILE;
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break;
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case EPERM:
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case EACCES:
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case EFAULT:
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ret = SSH2_FX_PERMISSION_DENIED;
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break;
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case ENAMETOOLONG:
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case EINVAL:
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ret = SSH2_FX_BAD_MESSAGE;
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break;
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default:
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ret = SSH2_FX_FAILURE;
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break;
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}
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return ret;
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}
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int
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flags_from_portable(int pflags)
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{
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int flags = 0;
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if (pflags & SSH2_FXF_READ &&
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pflags & SSH2_FXF_WRITE) {
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flags = O_RDWR;
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} else if (pflags & SSH2_FXF_READ) {
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flags = O_RDONLY;
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} else if (pflags & SSH2_FXF_WRITE) {
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flags = O_WRONLY;
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}
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if (pflags & SSH2_FXF_CREAT)
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flags |= O_CREAT;
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if (pflags & SSH2_FXF_TRUNC)
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flags |= O_TRUNC;
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if (pflags & SSH2_FXF_EXCL)
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flags |= O_EXCL;
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return flags;
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}
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void
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attrib_clear(Attrib *a)
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{
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a->flags = 0;
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a->size = 0;
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a->uid = 0;
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a->gid = 0;
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a->perm = 0;
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a->atime = 0;
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a->mtime = 0;
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}
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Attrib *
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decode_attrib(Buffer *b)
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{
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static Attrib a;
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attrib_clear(&a);
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a.flags = buffer_get_int(b);
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if (a.flags & SSH2_FILEXFER_ATTR_SIZE) {
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a.size = buffer_get_int64(b);
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}
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if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
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a.uid = buffer_get_int(b);
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a.gid = buffer_get_int(b);
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}
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if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
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a.perm = buffer_get_int(b);
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}
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if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
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a.atime = buffer_get_int(b);
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a.mtime = buffer_get_int(b);
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}
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/* vendor-specific extensions */
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if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
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char *type, *data;
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int i, count;
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count = buffer_get_int(b);
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for (i = 0; i < count; i++) {
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type = buffer_get_string(b, NULL);
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data = buffer_get_string(b, NULL);
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xfree(type);
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xfree(data);
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}
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}
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return &a;
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}
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void
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encode_attrib(Buffer *b, Attrib *a)
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{
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buffer_put_int(b, a->flags);
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if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
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buffer_put_int64(b, a->size);
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}
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if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
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buffer_put_int(b, a->uid);
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buffer_put_int(b, a->gid);
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}
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if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
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buffer_put_int(b, a->perm);
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}
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if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
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buffer_put_int(b, a->atime);
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buffer_put_int(b, a->mtime);
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}
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}
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void
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stat_to_attrib(struct stat *st, Attrib *a)
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{
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attrib_clear(a);
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a->flags = 0;
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a->flags |= SSH2_FILEXFER_ATTR_SIZE;
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a->size = st->st_size;
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a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
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a->uid = st->st_uid;
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a->gid = st->st_gid;
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a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
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a->perm = st->st_mode;
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a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
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a->atime = st->st_atime;
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a->mtime = st->st_mtime;
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}
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Attrib *
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get_attrib(void)
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{
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return decode_attrib(&iqueue);
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}
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/* handle handles */
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typedef struct Handle Handle;
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struct Handle {
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int use;
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DIR *dirp;
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int fd;
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char *name;
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};
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enum {
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HANDLE_UNUSED,
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HANDLE_DIR,
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HANDLE_FILE
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};
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Handle handles[100];
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void
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handle_init(void)
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{
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int i;
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for(i = 0; i < sizeof(handles)/sizeof(Handle); i++)
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handles[i].use = HANDLE_UNUSED;
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}
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int
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handle_new(int use, char *name, int fd, DIR *dirp)
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{
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int i;
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for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) {
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if (handles[i].use == HANDLE_UNUSED) {
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handles[i].use = use;
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handles[i].dirp = dirp;
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handles[i].fd = fd;
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handles[i].name = name;
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return i;
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}
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}
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return -1;
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}
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int
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handle_is_ok(int i, int type)
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{
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return i >= 0 && i < sizeof(handles)/sizeof(Handle) &&
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handles[i].use == type;
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}
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int
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handle_to_string(int handle, char **stringp, int *hlenp)
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{
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if (stringp == NULL || hlenp == NULL)
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return -1;
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*stringp = xmalloc(sizeof(int32_t));
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PUT_32BIT(*stringp, handle);
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*hlenp = sizeof(int32_t);
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return 0;
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}
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int
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handle_from_string(char *handle, u_int hlen)
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{
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int val;
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if (hlen != sizeof(int32_t))
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return -1;
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val = GET_32BIT(handle);
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if (handle_is_ok(val, HANDLE_FILE) ||
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handle_is_ok(val, HANDLE_DIR))
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return val;
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return -1;
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}
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char *
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handle_to_name(int handle)
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{
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if (handle_is_ok(handle, HANDLE_DIR)||
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handle_is_ok(handle, HANDLE_FILE))
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return handles[handle].name;
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return NULL;
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}
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DIR *
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handle_to_dir(int handle)
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{
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if (handle_is_ok(handle, HANDLE_DIR))
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return handles[handle].dirp;
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return NULL;
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}
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int
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handle_to_fd(int handle)
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{
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if (handle_is_ok(handle, HANDLE_FILE))
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return handles[handle].fd;
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return -1;
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}
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int
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handle_close(int handle)
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{
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int ret = -1;
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if (handle_is_ok(handle, HANDLE_FILE)) {
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ret = close(handles[handle].fd);
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handles[handle].use = HANDLE_UNUSED;
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} else if (handle_is_ok(handle, HANDLE_DIR)) {
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ret = closedir(handles[handle].dirp);
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handles[handle].use = HANDLE_UNUSED;
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} else {
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errno = ENOENT;
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}
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return ret;
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}
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int
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get_handle(void)
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{
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char *handle;
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int val = -1;
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u_int hlen;
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handle = get_string(&hlen);
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if (hlen < 256)
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val = handle_from_string(handle, hlen);
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xfree(handle);
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return val;
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}
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/* send replies */
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void
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send_msg(Buffer *m)
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{
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int mlen = buffer_len(m);
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buffer_put_int(&oqueue, mlen);
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buffer_append(&oqueue, buffer_ptr(m), mlen);
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buffer_consume(m, mlen);
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}
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void
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send_status(u_int32_t id, u_int32_t error)
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{
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Buffer msg;
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TRACE("sent status id %d error %d", id, error);
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buffer_init(&msg);
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buffer_put_char(&msg, SSH2_FXP_STATUS);
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buffer_put_int(&msg, id);
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buffer_put_int(&msg, error);
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send_msg(&msg);
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buffer_free(&msg);
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}
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void
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send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
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{
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Buffer msg;
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buffer_init(&msg);
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buffer_put_char(&msg, type);
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buffer_put_int(&msg, id);
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buffer_put_string(&msg, data, dlen);
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send_msg(&msg);
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buffer_free(&msg);
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}
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void
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send_data(u_int32_t id, char *data, int dlen)
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{
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TRACE("sent data id %d len %d", id, dlen);
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send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
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}
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void
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send_handle(u_int32_t id, int handle)
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{
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char *string;
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int hlen;
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handle_to_string(handle, &string, &hlen);
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TRACE("sent handle id %d handle %d", id, handle);
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send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
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xfree(string);
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}
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void
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send_names(u_int32_t id, int count, Stat *stats)
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{
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Buffer msg;
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int i;
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buffer_init(&msg);
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buffer_put_char(&msg, SSH2_FXP_NAME);
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buffer_put_int(&msg, id);
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buffer_put_int(&msg, count);
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TRACE("sent names id %d count %d", id, count);
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for (i = 0; i < count; i++) {
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buffer_put_cstring(&msg, stats[i].name);
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buffer_put_cstring(&msg, stats[i].long_name);
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encode_attrib(&msg, &stats[i].attrib);
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}
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send_msg(&msg);
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buffer_free(&msg);
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}
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void
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send_attrib(u_int32_t id, Attrib *a)
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{
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Buffer msg;
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TRACE("sent attrib id %d have 0x%x", id, a->flags);
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buffer_init(&msg);
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buffer_put_char(&msg, SSH2_FXP_ATTRS);
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buffer_put_int(&msg, id);
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encode_attrib(&msg, a);
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send_msg(&msg);
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buffer_free(&msg);
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}
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|
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/* parse incoming */
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|
|
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void
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process_init(void)
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{
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Buffer msg;
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int version = buffer_get_int(&iqueue);
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TRACE("client version %d", version);
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buffer_init(&msg);
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buffer_put_char(&msg, SSH2_FXP_VERSION);
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buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
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send_msg(&msg);
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buffer_free(&msg);
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}
|
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|
|
void
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process_open(void)
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|
{
|
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u_int32_t id, pflags;
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Attrib *a;
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char *name;
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int handle, fd, flags, mode, status = SSH2_FX_FAILURE;
|
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|
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id = get_int();
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name = get_string(NULL);
|
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pflags = get_int(); /* portable flags */
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|
a = get_attrib();
|
|
flags = flags_from_portable(pflags);
|
|
mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666;
|
|
TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode);
|
|
fd = open(name, flags, mode);
|
|
if (fd < 0) {
|
|
status = errno_to_portable(errno);
|
|
} else {
|
|
handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL);
|
|
if (handle < 0) {
|
|
close(fd);
|
|
} else {
|
|
send_handle(id, handle);
|
|
status = SSH2_FX_OK;
|
|
}
|
|
}
|
|
if (status != SSH2_FX_OK)
|
|
send_status(id, status);
|
|
xfree(name);
|
|
}
|
|
|
|
void
|
|
process_close(void)
|
|
{
|
|
u_int32_t id;
|
|
int handle, ret, status = SSH2_FX_FAILURE;
|
|
|
|
id = get_int();
|
|
handle = get_handle();
|
|
TRACE("close id %d handle %d", id, handle);
|
|
ret = handle_close(handle);
|
|
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
|
|
send_status(id, status);
|
|
}
|
|
|
|
void
|
|
process_read(void)
|
|
{
|
|
char buf[64*1024];
|
|
u_int32_t id, len;
|
|
int handle, fd, ret, status = SSH2_FX_FAILURE;
|
|
u_int64_t off;
|
|
|
|
id = get_int();
|
|
handle = get_handle();
|
|
off = get_int64();
|
|
len = get_int();
|
|
|
|
TRACE("read id %d handle %d off %lld len %d", id, handle, off, len);
|
|
if (len > sizeof buf) {
|
|
len = sizeof buf;
|
|
log("read change len %d", len);
|
|
}
|
|
fd = handle_to_fd(handle);
|
|
if (fd >= 0) {
|
|
if (lseek(fd, off, SEEK_SET) < 0) {
|
|
error("process_read: seek failed");
|
|
status = errno_to_portable(errno);
|
|
} else {
|
|
ret = read(fd, buf, len);
|
|
if (ret < 0) {
|
|
status = errno_to_portable(errno);
|
|
} else if (ret == 0) {
|
|
status = SSH2_FX_EOF;
|
|
} else {
|
|
send_data(id, buf, ret);
|
|
status = SSH2_FX_OK;
|
|
}
|
|
}
|
|
}
|
|
if (status != SSH2_FX_OK)
|
|
send_status(id, status);
|
|
}
|
|
|
|
void
|
|
process_write(void)
|
|
{
|
|
u_int32_t id;
|
|
u_int64_t off;
|
|
u_int len;
|
|
int handle, fd, ret, status = SSH2_FX_FAILURE;
|
|
char *data;
|
|
|
|
id = get_int();
|
|
handle = get_handle();
|
|
off = get_int64();
|
|
data = get_string(&len);
|
|
|
|
TRACE("write id %d handle %d off %lld len %d", id, handle, off, len);
|
|
fd = handle_to_fd(handle);
|
|
if (fd >= 0) {
|
|
if (lseek(fd, off, SEEK_SET) < 0) {
|
|
status = errno_to_portable(errno);
|
|
error("process_write: seek failed");
|
|
} else {
|
|
/* XXX ATOMICIO ? */
|
|
ret = write(fd, data, len);
|
|
if (ret == -1) {
|
|
error("process_write: write failed");
|
|
status = errno_to_portable(errno);
|
|
} else if (ret == len) {
|
|
status = SSH2_FX_OK;
|
|
} else {
|
|
log("nothing at all written");
|
|
}
|
|
}
|
|
}
|
|
send_status(id, status);
|
|
xfree(data);
|
|
}
|
|
|
|
void
|
|
process_do_stat(int do_lstat)
|
|
{
|
|
Attrib a;
|
|
struct stat st;
|
|
u_int32_t id;
|
|
char *name;
|
|
int ret, status = SSH2_FX_FAILURE;
|
|
|
|
id = get_int();
|
|
name = get_string(NULL);
|
|
TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name);
|
|
ret = do_lstat ? lstat(name, &st) : stat(name, &st);
|
|
if (ret < 0) {
|
|
status = errno_to_portable(errno);
|
|
} else {
|
|
stat_to_attrib(&st, &a);
|
|
send_attrib(id, &a);
|
|
status = SSH2_FX_OK;
|
|
}
|
|
if (status != SSH2_FX_OK)
|
|
send_status(id, status);
|
|
xfree(name);
|
|
}
|
|
|
|
void
|
|
process_stat(void)
|
|
{
|
|
process_do_stat(0);
|
|
}
|
|
|
|
void
|
|
process_lstat(void)
|
|
{
|
|
process_do_stat(1);
|
|
}
|
|
|
|
void
|
|
process_fstat(void)
|
|
{
|
|
Attrib a;
|
|
struct stat st;
|
|
u_int32_t id;
|
|
int fd, ret, handle, status = SSH2_FX_FAILURE;
|
|
|
|
id = get_int();
|
|
handle = get_handle();
|
|
TRACE("fstat id %d handle %d", id, handle);
|
|
fd = handle_to_fd(handle);
|
|
if (fd >= 0) {
|
|
ret = fstat(fd, &st);
|
|
if (ret < 0) {
|
|
status = errno_to_portable(errno);
|
|
} else {
|
|
stat_to_attrib(&st, &a);
|
|
send_attrib(id, &a);
|
|
status = SSH2_FX_OK;
|
|
}
|
|
}
|
|
if (status != SSH2_FX_OK)
|
|
send_status(id, status);
|
|
}
|
|
|
|
struct timeval *
|
|
attrib_to_tv(Attrib *a)
|
|
{
|
|
static struct timeval tv[2];
|
|
tv[0].tv_sec = a->atime;
|
|
tv[0].tv_usec = 0;
|
|
tv[1].tv_sec = a->mtime;
|
|
tv[1].tv_usec = 0;
|
|
return tv;
|
|
}
|
|
|
|
void
|
|
process_setstat(void)
|
|
{
|
|
Attrib *a;
|
|
u_int32_t id;
|
|
char *name;
|
|
int ret;
|
|
int status = SSH2_FX_OK;
|
|
|
|
id = get_int();
|
|
name = get_string(NULL);
|
|
a = get_attrib();
|
|
TRACE("setstat id %d name %s", id, name);
|
|
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
|
|
ret = chmod(name, a->perm & 0777);
|
|
if (ret == -1)
|
|
status = errno_to_portable(errno);
|
|
}
|
|
if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
|
|
ret = utimes(name, attrib_to_tv(a));
|
|
if (ret == -1)
|
|
status = errno_to_portable(errno);
|
|
}
|
|
send_status(id, status);
|
|
xfree(name);
|
|
}
|
|
|
|
void
|
|
process_fsetstat(void)
|
|
{
|
|
Attrib *a;
|
|
u_int32_t id;
|
|
int handle, fd, ret;
|
|
int status = SSH2_FX_OK;
|
|
char *name;
|
|
|
|
id = get_int();
|
|
handle = get_handle();
|
|
a = get_attrib();
|
|
TRACE("fsetstat id %d handle %d", id, handle);
|
|
fd = handle_to_fd(handle);
|
|
name = handle_to_name(handle);
|
|
if ((fd < 0) || (name == NULL)) {
|
|
status = SSH2_FX_FAILURE;
|
|
} else {
|
|
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
|
|
#ifdef HAVE_FCHMOD
|
|
ret = fchmod(fd, a->perm & 0777);
|
|
#else
|
|
ret = chmod(name, a->perm & 077);
|
|
#endif
|
|
if (ret == -1)
|
|
status = errno_to_portable(errno);
|
|
}
|
|
if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
|
|
#ifdef HAVE_FUTIMES
|
|
ret = futimes(fd, attrib_to_tv(a));
|
|
#else
|
|
ret = utimes(name, attrib_to_tv(a));
|
|
#endif
|
|
if (ret == -1)
|
|
status = errno_to_portable(errno);
|
|
}
|
|
}
|
|
send_status(id, status);
|
|
}
|
|
|
|
void
|
|
process_opendir(void)
|
|
{
|
|
DIR *dirp = NULL;
|
|
char *path;
|
|
int handle, status = SSH2_FX_FAILURE;
|
|
u_int32_t id;
|
|
|
|
id = get_int();
|
|
path = get_string(NULL);
|
|
TRACE("opendir id %d path %s", id, path);
|
|
dirp = opendir(path);
|
|
if (dirp == NULL) {
|
|
status = errno_to_portable(errno);
|
|
} else {
|
|
handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp);
|
|
if (handle < 0) {
|
|
closedir(dirp);
|
|
} else {
|
|
send_handle(id, handle);
|
|
status = SSH2_FX_OK;
|
|
}
|
|
|
|
}
|
|
if (status != SSH2_FX_OK)
|
|
send_status(id, status);
|
|
xfree(path);
|
|
}
|
|
|
|
/*
|
|
* drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
|
|
*/
|
|
char *
|
|
ls_file(char *name, struct stat *st)
|
|
{
|
|
int sz = 0;
|
|
struct passwd *pw;
|
|
struct group *gr;
|
|
struct tm *ltime = localtime(&st->st_mtime);
|
|
char *user, *group;
|
|
char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
|
|
|
|
strmode(st->st_mode, mode);
|
|
if ((pw = getpwuid(st->st_uid)) != NULL) {
|
|
user = pw->pw_name;
|
|
} else {
|
|
snprintf(ubuf, sizeof ubuf, "%d", st->st_uid);
|
|
user = ubuf;
|
|
}
|
|
if ((gr = getgrgid(st->st_gid)) != NULL) {
|
|
group = gr->gr_name;
|
|
} else {
|
|
snprintf(gbuf, sizeof gbuf, "%d", st->st_gid);
|
|
group = gbuf;
|
|
}
|
|
if (ltime != NULL) {
|
|
if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
|
|
sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
|
|
else
|
|
sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
|
|
}
|
|
if (sz == 0)
|
|
tbuf[0] = '\0';
|
|
snprintf(buf, sizeof buf, "%s %3d %-8.8s %-8.8s %8qd %s %s", mode,
|
|
st->st_nlink, user, group, (long long)st->st_size, tbuf, name);
|
|
return xstrdup(buf);
|
|
}
|
|
|
|
void
|
|
process_readdir(void)
|
|
{
|
|
DIR *dirp;
|
|
struct dirent *dp;
|
|
char *path;
|
|
int handle;
|
|
u_int32_t id;
|
|
|
|
id = get_int();
|
|
handle = get_handle();
|
|
TRACE("readdir id %d handle %d", id, handle);
|
|
dirp = handle_to_dir(handle);
|
|
path = handle_to_name(handle);
|
|
if (dirp == NULL || path == NULL) {
|
|
send_status(id, SSH2_FX_FAILURE);
|
|
} else {
|
|
struct stat st;
|
|
char pathname[1024];
|
|
Stat *stats;
|
|
int nstats = 10, count = 0, i;
|
|
stats = xmalloc(nstats * sizeof(Stat));
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
if (count >= nstats) {
|
|
nstats *= 2;
|
|
stats = xrealloc(stats, nstats * sizeof(Stat));
|
|
}
|
|
/* XXX OVERFLOW ? */
|
|
snprintf(pathname, sizeof pathname,
|
|
"%s/%s", path, dp->d_name);
|
|
if (lstat(pathname, &st) < 0)
|
|
continue;
|
|
stat_to_attrib(&st, &(stats[count].attrib));
|
|
stats[count].name = xstrdup(dp->d_name);
|
|
stats[count].long_name = ls_file(dp->d_name, &st);
|
|
count++;
|
|
/* send up to 100 entries in one message */
|
|
/* XXX check packet size instead */
|
|
if (count == 100)
|
|
break;
|
|
}
|
|
if (count > 0) {
|
|
send_names(id, count, stats);
|
|
for(i = 0; i < count; i++) {
|
|
xfree(stats[i].name);
|
|
xfree(stats[i].long_name);
|
|
}
|
|
} else {
|
|
send_status(id, SSH2_FX_EOF);
|
|
}
|
|
xfree(stats);
|
|
}
|
|
}
|
|
|
|
void
|
|
process_remove(void)
|
|
{
|
|
char *name;
|
|
u_int32_t id;
|
|
int status = SSH2_FX_FAILURE;
|
|
int ret;
|
|
|
|
id = get_int();
|
|
name = get_string(NULL);
|
|
TRACE("remove id %d name %s", id, name);
|
|
ret = unlink(name);
|
|
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
|
|
send_status(id, status);
|
|
xfree(name);
|
|
}
|
|
|
|
void
|
|
process_mkdir(void)
|
|
{
|
|
Attrib *a;
|
|
u_int32_t id;
|
|
char *name;
|
|
int ret, mode, status = SSH2_FX_FAILURE;
|
|
|
|
id = get_int();
|
|
name = get_string(NULL);
|
|
a = get_attrib();
|
|
mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
|
|
a->perm & 0777 : 0777;
|
|
TRACE("mkdir id %d name %s mode 0%o", id, name, mode);
|
|
ret = mkdir(name, mode);
|
|
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
|
|
send_status(id, status);
|
|
xfree(name);
|
|
}
|
|
|
|
void
|
|
process_rmdir(void)
|
|
{
|
|
u_int32_t id;
|
|
char *name;
|
|
int ret, status;
|
|
|
|
id = get_int();
|
|
name = get_string(NULL);
|
|
TRACE("rmdir id %d name %s", id, name);
|
|
ret = rmdir(name);
|
|
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
|
|
send_status(id, status);
|
|
xfree(name);
|
|
}
|
|
|
|
void
|
|
process_realpath(void)
|
|
{
|
|
char resolvedname[MAXPATHLEN];
|
|
u_int32_t id;
|
|
char *path;
|
|
|
|
id = get_int();
|
|
path = get_string(NULL);
|
|
if (path[0] == '\0') {
|
|
xfree(path);
|
|
path = xstrdup(".");
|
|
}
|
|
TRACE("realpath id %d path %s", id, path);
|
|
if (realpath(path, resolvedname) == NULL) {
|
|
send_status(id, errno_to_portable(errno));
|
|
} else {
|
|
Stat s;
|
|
attrib_clear(&s.attrib);
|
|
s.name = s.long_name = resolvedname;
|
|
send_names(id, 1, &s);
|
|
}
|
|
xfree(path);
|
|
}
|
|
|
|
void
|
|
process_rename(void)
|
|
{
|
|
u_int32_t id;
|
|
struct stat st;
|
|
char *oldpath, *newpath;
|
|
int ret, status = SSH2_FX_FAILURE;
|
|
|
|
id = get_int();
|
|
oldpath = get_string(NULL);
|
|
newpath = get_string(NULL);
|
|
TRACE("rename id %d old %s new %s", id, oldpath, newpath);
|
|
/* fail if 'newpath' exists */
|
|
if (stat(newpath, &st) == -1) {
|
|
ret = rename(oldpath, newpath);
|
|
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
|
|
}
|
|
send_status(id, status);
|
|
xfree(oldpath);
|
|
xfree(newpath);
|
|
}
|
|
|
|
void
|
|
process_extended(void)
|
|
{
|
|
u_int32_t id;
|
|
char *request;
|
|
|
|
id = get_int();
|
|
request = get_string(NULL);
|
|
send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
|
|
xfree(request);
|
|
}
|
|
|
|
/* stolen from ssh-agent */
|
|
|
|
void
|
|
process(void)
|
|
{
|
|
u_int msg_len;
|
|
u_int type;
|
|
u_char *cp;
|
|
|
|
if (buffer_len(&iqueue) < 5)
|
|
return; /* Incomplete message. */
|
|
cp = (u_char *) buffer_ptr(&iqueue);
|
|
msg_len = GET_32BIT(cp);
|
|
if (msg_len > 256 * 1024) {
|
|
error("bad message ");
|
|
exit(11);
|
|
}
|
|
if (buffer_len(&iqueue) < msg_len + 4)
|
|
return;
|
|
buffer_consume(&iqueue, 4);
|
|
type = buffer_get_char(&iqueue);
|
|
switch (type) {
|
|
case SSH2_FXP_INIT:
|
|
process_init();
|
|
break;
|
|
case SSH2_FXP_OPEN:
|
|
process_open();
|
|
break;
|
|
case SSH2_FXP_CLOSE:
|
|
process_close();
|
|
break;
|
|
case SSH2_FXP_READ:
|
|
process_read();
|
|
break;
|
|
case SSH2_FXP_WRITE:
|
|
process_write();
|
|
break;
|
|
case SSH2_FXP_LSTAT:
|
|
process_lstat();
|
|
break;
|
|
case SSH2_FXP_FSTAT:
|
|
process_fstat();
|
|
break;
|
|
case SSH2_FXP_SETSTAT:
|
|
process_setstat();
|
|
break;
|
|
case SSH2_FXP_FSETSTAT:
|
|
process_fsetstat();
|
|
break;
|
|
case SSH2_FXP_OPENDIR:
|
|
process_opendir();
|
|
break;
|
|
case SSH2_FXP_READDIR:
|
|
process_readdir();
|
|
break;
|
|
case SSH2_FXP_REMOVE:
|
|
process_remove();
|
|
break;
|
|
case SSH2_FXP_MKDIR:
|
|
process_mkdir();
|
|
break;
|
|
case SSH2_FXP_RMDIR:
|
|
process_rmdir();
|
|
break;
|
|
case SSH2_FXP_REALPATH:
|
|
process_realpath();
|
|
break;
|
|
case SSH2_FXP_STAT:
|
|
process_stat();
|
|
break;
|
|
case SSH2_FXP_RENAME:
|
|
process_rename();
|
|
break;
|
|
case SSH2_FXP_EXTENDED:
|
|
process_extended();
|
|
break;
|
|
default:
|
|
error("Unknown message %d", type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int ac, char **av)
|
|
{
|
|
fd_set rset, wset;
|
|
int in, out, max;
|
|
ssize_t len, olen;
|
|
|
|
__progname = get_progname(av[0]);
|
|
handle_init();
|
|
|
|
#ifdef DEBUG_SFTP_SERVER
|
|
log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0);
|
|
#endif
|
|
|
|
in = dup(STDIN_FILENO);
|
|
out = dup(STDOUT_FILENO);
|
|
|
|
max = 0;
|
|
if (in > max)
|
|
max = in;
|
|
if (out > max)
|
|
max = out;
|
|
|
|
buffer_init(&iqueue);
|
|
buffer_init(&oqueue);
|
|
|
|
for (;;) {
|
|
FD_ZERO(&rset);
|
|
FD_ZERO(&wset);
|
|
|
|
FD_SET(in, &rset);
|
|
olen = buffer_len(&oqueue);
|
|
if (olen > 0)
|
|
FD_SET(out, &wset);
|
|
|
|
if (select(max+1, &rset, &wset, NULL, NULL) < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
exit(2);
|
|
}
|
|
|
|
/* copy stdin to iqueue */
|
|
if (FD_ISSET(in, &rset)) {
|
|
char buf[4*4096];
|
|
len = read(in, buf, sizeof buf);
|
|
if (len == 0) {
|
|
debug("read eof");
|
|
exit(0);
|
|
} else if (len < 0) {
|
|
error("read error");
|
|
exit(1);
|
|
} else {
|
|
buffer_append(&iqueue, buf, len);
|
|
}
|
|
}
|
|
/* send oqueue to stdout */
|
|
if (FD_ISSET(out, &wset)) {
|
|
len = write(out, buffer_ptr(&oqueue), olen);
|
|
if (len < 0) {
|
|
error("write error");
|
|
exit(1);
|
|
} else {
|
|
buffer_consume(&oqueue, len);
|
|
}
|
|
}
|
|
/* process requests from client */
|
|
process();
|
|
}
|
|
}
|