260 lines
6.8 KiB
C
260 lines
6.8 KiB
C
/* $OpenBSD: sftp-common.c,v 1.31 2018/09/13 15:23:32 millert 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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