271dcc6a42
This completely removes client-side support for the SSH 1 protocol, which was already disabled in 12 but is still enabled in 11. For that reason, we will not be able to merge 7.6p1 or newer back to 11.
260 lines
6.8 KiB
C
260 lines
6.8 KiB
C
/* $OpenBSD: sftp-common.c,v 1.30 2017/06/10 06:36:46 djm Exp $ */
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/*
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* Copyright (c) 2001 Markus Friedl. All rights reserved.
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* Copyright (c) 2001 Damien Miller. 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("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <stdarg.h>
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#ifdef HAVE_UTIL_H
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#include <util.h>
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#endif
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#include "xmalloc.h"
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#include "ssherr.h"
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#include "sshbuf.h"
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#include "log.h"
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#include "misc.h"
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#include "sftp.h"
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#include "sftp-common.h"
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/* Clear contents of attributes structure */
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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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/* Convert from struct stat to filexfer attribs */
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void
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stat_to_attrib(const 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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/* Convert from filexfer attribs to struct stat */
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void
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attrib_to_stat(const Attrib *a, struct stat *st)
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{
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memset(st, 0, sizeof(*st));
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if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
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st->st_size = a->size;
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if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
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st->st_uid = a->uid;
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st->st_gid = a->gid;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
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st->st_mode = a->perm;
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if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
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st->st_atime = a->atime;
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st->st_mtime = a->mtime;
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}
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}
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/* Decode attributes in buffer */
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int
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decode_attrib(struct sshbuf *b, Attrib *a)
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{
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int r;
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attrib_clear(a);
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if ((r = sshbuf_get_u32(b, &a->flags)) != 0)
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return r;
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if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
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if ((r = sshbuf_get_u64(b, &a->size)) != 0)
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return r;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
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if ((r = sshbuf_get_u32(b, &a->uid)) != 0 ||
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(r = sshbuf_get_u32(b, &a->gid)) != 0)
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return r;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
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if ((r = sshbuf_get_u32(b, &a->perm)) != 0)
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return r;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
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if ((r = sshbuf_get_u32(b, &a->atime)) != 0 ||
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(r = sshbuf_get_u32(b, &a->mtime)) != 0)
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return r;
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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;
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u_char *data;
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size_t dlen;
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u_int i, count;
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if ((r = sshbuf_get_u32(b, &count)) != 0)
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fatal("%s: buffer error: %s", __func__, ssh_err(r));
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for (i = 0; i < count; i++) {
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if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
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(r = sshbuf_get_string(b, &data, &dlen)) != 0)
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return r;
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debug3("Got file attribute \"%.100s\" len %zu",
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type, dlen);
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free(type);
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free(data);
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}
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}
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return 0;
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}
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/* Encode attributes to buffer */
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int
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encode_attrib(struct sshbuf *b, const Attrib *a)
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{
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int r;
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if ((r = sshbuf_put_u32(b, a->flags)) != 0)
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return r;
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if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
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if ((r = sshbuf_put_u64(b, a->size)) != 0)
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return r;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
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if ((r = sshbuf_put_u32(b, a->uid)) != 0 ||
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(r = sshbuf_put_u32(b, a->gid)) != 0)
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return r;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
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if ((r = sshbuf_put_u32(b, a->perm)) != 0)
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return r;
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}
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if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
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if ((r = sshbuf_put_u32(b, a->atime)) != 0 ||
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(r = sshbuf_put_u32(b, a->mtime)) != 0)
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return r;
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}
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return 0;
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}
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/* Convert from SSH2_FX_ status to text error message */
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const char *
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fx2txt(int status)
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{
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switch (status) {
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case SSH2_FX_OK:
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return("No error");
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case SSH2_FX_EOF:
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return("End of file");
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case SSH2_FX_NO_SUCH_FILE:
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return("No such file or directory");
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case SSH2_FX_PERMISSION_DENIED:
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return("Permission denied");
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case SSH2_FX_FAILURE:
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return("Failure");
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case SSH2_FX_BAD_MESSAGE:
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return("Bad message");
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case SSH2_FX_NO_CONNECTION:
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return("No connection");
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case SSH2_FX_CONNECTION_LOST:
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return("Connection lost");
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case SSH2_FX_OP_UNSUPPORTED:
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return("Operation unsupported");
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default:
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return("Unknown status");
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}
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/* NOTREACHED */
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}
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/*
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* drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
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*/
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char *
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ls_file(const char *name, const struct stat *st, int remote, int si_units)
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{
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int ulen, glen, sz = 0;
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struct tm *ltime = localtime(&st->st_mtime);
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const char *user, *group;
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char buf[1024], lc[8], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
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char sbuf[FMT_SCALED_STRSIZE];
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time_t now;
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strmode(st->st_mode, mode);
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if (remote) {
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snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
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user = ubuf;
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snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
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group = gbuf;
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strlcpy(lc, "?", sizeof(lc));
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} else {
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user = user_from_uid(st->st_uid, 0);
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group = group_from_gid(st->st_gid, 0);
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snprintf(lc, sizeof(lc), "%u", (u_int)st->st_nlink);
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}
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if (ltime != NULL) {
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now = time(NULL);
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if (now - (365*24*60*60)/2 < st->st_mtime &&
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now >= st->st_mtime)
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sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
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else
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sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
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}
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if (sz == 0)
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tbuf[0] = '\0';
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ulen = MAXIMUM(strlen(user), 8);
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glen = MAXIMUM(strlen(group), 8);
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if (si_units) {
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fmt_scaled((long long)st->st_size, sbuf);
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snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8s %s %s",
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mode, lc, ulen, user, glen, group,
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sbuf, tbuf, name);
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} else {
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snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8llu %s %s",
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mode, lc, ulen, user, glen, group,
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(unsigned long long)st->st_size, tbuf, name);
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}
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return xstrdup(buf);
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}
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