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/* $OpenBSD: sftp-common.c,v 1.30 2017/06/10 06:36:46 djm Exp $ */
/*
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Damien Miller. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <stdarg.h>
#include <stdlib.h>
#include <util.h>
#include "xmalloc.h"
#include "ssherr.h"
#include "sshbuf.h"
#include "log.h"
#include "misc.h"
#include "sftp.h"
#include "sftp-common.h"
/* Clear contents of attributes structure */
void
attrib_clear(Attrib *a)
{
a->flags = 0;
a->size = 0;
a->uid = 0;
a->gid = 0;
a->perm = 0;
a->atime = 0;
a->mtime = 0;
}
/* Convert from struct stat to filexfer attribs */
void
stat_to_attrib(const struct stat *st, Attrib *a)
{
attrib_clear(a);
a->flags = 0;
a->flags |= SSH2_FILEXFER_ATTR_SIZE;
a->size = st->st_size;
a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
a->uid = st->st_uid;
a->gid = st->st_gid;
a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
a->perm = st->st_mode;
a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
a->atime = st->st_atime;
a->mtime = st->st_mtime;
}
/* Convert from filexfer attribs to struct stat */
void
attrib_to_stat(const Attrib *a, struct stat *st)
{
memset(st, 0, sizeof(*st));
if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
st->st_size = a->size;
if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
st->st_uid = a->uid;
st->st_gid = a->gid;
}
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
st->st_mode = a->perm;
if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
st->st_atime = a->atime;
st->st_mtime = a->mtime;
}
}
/* Decode attributes in buffer */
int
decode_attrib(struct sshbuf *b, Attrib *a)
{
int r;
attrib_clear(a);
if ((r = sshbuf_get_u32(b, &a->flags)) != 0)
return r;
if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
if ((r = sshbuf_get_u64(b, &a->size)) != 0)
return r;
}
if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
if ((r = sshbuf_get_u32(b, &a->uid)) != 0 ||
(r = sshbuf_get_u32(b, &a->gid)) != 0)
return r;
}
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
if ((r = sshbuf_get_u32(b, &a->perm)) != 0)
return r;
}
if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
if ((r = sshbuf_get_u32(b, &a->atime)) != 0 ||
(r = sshbuf_get_u32(b, &a->mtime)) != 0)
return r;
}
/* vendor-specific extensions */
if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) {
char *type;
u_char *data;
size_t dlen;
u_int i, count;
if ((r = sshbuf_get_u32(b, &count)) != 0)
fatal("%s: buffer error: %s", __func__, ssh_err(r));
for (i = 0; i < count; i++) {
if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
(r = sshbuf_get_string(b, &data, &dlen)) != 0)
return r;
debug3("Got file attribute \"%.100s\" len %zu",
type, dlen);
free(type);
free(data);
}
}
return 0;
}
/* Encode attributes to buffer */
int
encode_attrib(struct sshbuf *b, const Attrib *a)
{
int r;
if ((r = sshbuf_put_u32(b, a->flags)) != 0)
return r;
if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
if ((r = sshbuf_put_u64(b, a->size)) != 0)
return r;
}
if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
if ((r = sshbuf_put_u32(b, a->uid)) != 0 ||
(r = sshbuf_put_u32(b, a->gid)) != 0)
return r;
}
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
if ((r = sshbuf_put_u32(b, a->perm)) != 0)
return r;
}
if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
if ((r = sshbuf_put_u32(b, a->atime)) != 0 ||
(r = sshbuf_put_u32(b, a->mtime)) != 0)
return r;
}
return 0;
}
/* Convert from SSH2_FX_ status to text error message */
const char *
fx2txt(int status)
{
switch (status) {
case SSH2_FX_OK:
return("No error");
case SSH2_FX_EOF:
return("End of file");
case SSH2_FX_NO_SUCH_FILE:
return("No such file or directory");
case SSH2_FX_PERMISSION_DENIED:
return("Permission denied");
case SSH2_FX_FAILURE:
return("Failure");
case SSH2_FX_BAD_MESSAGE:
return("Bad message");
case SSH2_FX_NO_CONNECTION:
return("No connection");
case SSH2_FX_CONNECTION_LOST:
return("Connection lost");
case SSH2_FX_OP_UNSUPPORTED:
return("Operation unsupported");
default:
return("Unknown status");
}
/* NOTREACHED */
}
/*
* drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
*/
char *
ls_file(const char *name, const struct stat *st, int remote, int si_units)
{
int ulen, glen, sz = 0;
struct tm *ltime = localtime(&st->st_mtime);
char *user, *group;
char buf[1024], lc[8], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
char sbuf[FMT_SCALED_STRSIZE];
time_t now;
strmode(st->st_mode, mode);
if (remote) {
snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
user = ubuf;
snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
group = gbuf;
strlcpy(lc, "?", sizeof(lc));
} else {
user = user_from_uid(st->st_uid, 0);
group = group_from_gid(st->st_gid, 0);
snprintf(lc, sizeof(lc), "%u", (u_int)st->st_nlink);
}
if (ltime != NULL) {
now = time(NULL);
if (now - (365*24*60*60)/2 < st->st_mtime &&
now >= st->st_mtime)
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';
ulen = MAXIMUM(strlen(user), 8);
glen = MAXIMUM(strlen(group), 8);
if (si_units) {
fmt_scaled((long long)st->st_size, sbuf);
snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8s %s %s",
mode, lc, ulen, user, glen, group,
sbuf, tbuf, name);
} else {
snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8llu %s %s",
mode, lc, ulen, user, glen, group,
(unsigned long long)st->st_size, tbuf, name);
}
return xstrdup(buf);
}
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