/*
- * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ * Copyright (c) 2000-2004 Markus Friedl. 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.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
*
- * 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.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
-RCSID("$OpenBSD: sftp-server.c,v 1.23 2001/03/07 10:11:23 djm Exp $");
+RCSID("$OpenBSD: sftp-server.c,v 1.45 2004/02/19 21:15:04 markus Exp $");
#include "buffer.h"
#include "bufaux.h"
/* Version of client */
int version;
-/* portable attibutes, etc. */
+/* portable attributes, etc. */
typedef struct Stat Stat;
Attrib attrib;
};
-int
+static int
errno_to_portable(int unixerrno)
{
int ret = 0;
return ret;
}
-int
+static int
flags_from_portable(int pflags)
{
int flags = 0;
return flags;
}
-Attrib *
+static Attrib *
get_attrib(void)
{
return decode_attrib(&iqueue);
Handle handles[100];
-void
+static void
handle_init(void)
{
int i;
- for(i = 0; i < sizeof(handles)/sizeof(Handle); i++)
+ for (i = 0; i < sizeof(handles)/sizeof(Handle); i++)
handles[i].use = HANDLE_UNUSED;
}
-int
-handle_new(int use, char *name, int fd, DIR *dirp)
+static int
+handle_new(int use, const char *name, int fd, DIR *dirp)
{
int i;
- for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) {
+ for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) {
if (handles[i].use == HANDLE_UNUSED) {
handles[i].use = use;
handles[i].dirp = dirp;
handles[i].fd = fd;
- handles[i].name = name;
+ handles[i].name = xstrdup(name);
return i;
}
}
return -1;
}
-int
+static int
handle_is_ok(int i, int type)
{
return i >= 0 && i < sizeof(handles)/sizeof(Handle) &&
handles[i].use == type;
}
-int
+static int
handle_to_string(int handle, char **stringp, int *hlenp)
{
if (stringp == NULL || hlenp == NULL)
return 0;
}
-int
-handle_from_string(char *handle, u_int hlen)
+static int
+handle_from_string(const char *handle, u_int hlen)
{
int val;
return -1;
}
-char *
+static char *
handle_to_name(int handle)
{
if (handle_is_ok(handle, HANDLE_DIR)||
return NULL;
}
-DIR *
+static DIR *
handle_to_dir(int handle)
{
if (handle_is_ok(handle, HANDLE_DIR))
return NULL;
}
-int
+static int
handle_to_fd(int handle)
{
if (handle_is_ok(handle, HANDLE_FILE))
return -1;
}
-int
+static int
handle_close(int handle)
{
int ret = -1;
if (handle_is_ok(handle, HANDLE_FILE)) {
ret = close(handles[handle].fd);
handles[handle].use = HANDLE_UNUSED;
+ xfree(handles[handle].name);
} else if (handle_is_ok(handle, HANDLE_DIR)) {
ret = closedir(handles[handle].dirp);
handles[handle].use = HANDLE_UNUSED;
+ xfree(handles[handle].name);
} else {
errno = ENOENT;
}
return ret;
}
-int
+static int
get_handle(void)
{
char *handle;
/* send replies */
-void
+static void
send_msg(Buffer *m)
{
int mlen = buffer_len(m);
buffer_consume(m, mlen);
}
-void
+static void
send_status(u_int32_t id, u_int32_t error)
{
Buffer msg;
"Unknown error" /* Others */
};
- TRACE("sent status id %d error %d", id, error);
+ TRACE("sent status id %u error %u", id, error);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_STATUS);
buffer_put_int(&msg, id);
buffer_put_int(&msg, error);
if (version >= 3) {
- buffer_put_cstring(&msg,
+ buffer_put_cstring(&msg,
status_messages[MIN(error,SSH2_FX_MAX)]);
buffer_put_cstring(&msg, "");
}
send_msg(&msg);
buffer_free(&msg);
}
-void
-send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
+static void
+send_data_or_handle(char type, u_int32_t id, const char *data, int dlen)
{
Buffer msg;
buffer_free(&msg);
}
-void
-send_data(u_int32_t id, char *data, int dlen)
+static void
+send_data(u_int32_t id, const char *data, int dlen)
{
- TRACE("sent data id %d len %d", id, dlen);
+ TRACE("sent data id %u len %d", id, dlen);
send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
}
-void
+static void
send_handle(u_int32_t id, int handle)
{
char *string;
int hlen;
handle_to_string(handle, &string, &hlen);
- TRACE("sent handle id %d handle %d", id, handle);
+ TRACE("sent handle id %u handle %d", id, handle);
send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
xfree(string);
}
-void
-send_names(u_int32_t id, int count, Stat *stats)
+static void
+send_names(u_int32_t id, int count, const Stat *stats)
{
Buffer msg;
int i;
buffer_put_char(&msg, SSH2_FXP_NAME);
buffer_put_int(&msg, id);
buffer_put_int(&msg, count);
- TRACE("sent names id %d count %d", id, count);
+ TRACE("sent names id %u count %d", id, count);
for (i = 0; i < count; i++) {
buffer_put_cstring(&msg, stats[i].name);
buffer_put_cstring(&msg, stats[i].long_name);
buffer_free(&msg);
}
-void
-send_attrib(u_int32_t id, Attrib *a)
+static void
+send_attrib(u_int32_t id, const Attrib *a)
{
Buffer msg;
- TRACE("sent attrib id %d have 0x%x", id, a->flags);
+ TRACE("sent attrib id %u have 0x%x", id, a->flags);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_ATTRS);
buffer_put_int(&msg, id);
/* parse incoming */
-void
+static void
process_init(void)
{
Buffer msg;
- version = buffer_get_int(&iqueue);
+ version = get_int();
TRACE("client version %d", version);
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_VERSION);
buffer_free(&msg);
}
-void
+static void
process_open(void)
{
u_int32_t id, pflags;
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);
+ TRACE("open id %u 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);
+ handle = handle_new(HANDLE_FILE, name, fd, NULL);
if (handle < 0) {
close(fd);
} else {
xfree(name);
}
-void
+static void
process_close(void)
{
u_int32_t id;
id = get_int();
handle = get_handle();
- TRACE("close id %d handle %d", id, handle);
+ TRACE("close id %u handle %d", id, handle);
ret = handle_close(handle);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
}
-void
+static void
process_read(void)
{
char buf[64*1024];
off = get_int64();
len = get_int();
- TRACE("read id %d handle %d off %llu len %d", id, handle,
+ TRACE("read id %u handle %d off %llu len %d", id, handle,
(u_int64_t)off, len);
if (len > sizeof buf) {
len = sizeof buf;
- log("read change len %d", len);
+ logit("read change len %d", len);
}
fd = handle_to_fd(handle);
if (fd >= 0) {
send_status(id, status);
}
-void
+static void
process_write(void)
{
u_int32_t id;
off = get_int64();
data = get_string(&len);
- TRACE("write id %d handle %d off %llu len %d", id, handle,
+ TRACE("write id %u handle %d off %llu len %d", id, handle,
(u_int64_t)off, len);
fd = handle_to_fd(handle);
if (fd >= 0) {
} else if (ret == len) {
status = SSH2_FX_OK;
} else {
- log("nothing at all written");
+ logit("nothing at all written");
}
}
}
xfree(data);
}
-void
+static void
process_do_stat(int do_lstat)
{
Attrib a;
id = get_int();
name = get_string(NULL);
- TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name);
+ TRACE("%sstat id %u name %s", do_lstat ? "l" : "", id, name);
ret = do_lstat ? lstat(name, &st) : stat(name, &st);
if (ret < 0) {
status = errno_to_portable(errno);
xfree(name);
}
-void
+static void
process_stat(void)
{
process_do_stat(0);
}
-void
+static void
process_lstat(void)
{
process_do_stat(1);
}
-void
+static void
process_fstat(void)
{
Attrib a;
id = get_int();
handle = get_handle();
- TRACE("fstat id %d handle %d", id, handle);
+ TRACE("fstat id %u handle %d", id, handle);
fd = handle_to_fd(handle);
if (fd >= 0) {
ret = fstat(fd, &st);
send_status(id, status);
}
-struct timeval *
-attrib_to_tv(Attrib *a)
+static struct timeval *
+attrib_to_tv(const Attrib *a)
{
static struct timeval tv[2];
return tv;
}
-void
+static void
process_setstat(void)
{
Attrib *a;
u_int32_t id;
char *name;
- int ret;
- int status = SSH2_FX_OK;
+ int status = SSH2_FX_OK, ret;
id = get_int();
name = get_string(NULL);
a = get_attrib();
- TRACE("setstat id %d name %s", id, name);
+ TRACE("setstat id %u name %s", id, name);
+ if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
+ ret = truncate(name, a->size);
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
ret = chmod(name, a->perm & 0777);
if (ret == -1)
xfree(name);
}
-void
+static void
process_fsetstat(void)
{
Attrib *a;
id = get_int();
handle = get_handle();
a = get_attrib();
- TRACE("fsetstat id %d handle %d", id, handle);
+ TRACE("fsetstat id %u 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_SIZE) {
+ ret = ftruncate(fd, a->size);
+ if (ret == -1)
+ status = errno_to_portable(errno);
+ }
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
#ifdef HAVE_FCHMOD
ret = fchmod(fd, a->perm & 0777);
send_status(id, status);
}
-void
+static void
process_opendir(void)
{
DIR *dirp = NULL;
id = get_int();
path = get_string(NULL);
- TRACE("opendir id %d path %s", id, path);
+ TRACE("opendir id %u 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);
+ handle = handle_new(HANDLE_DIR, path, 0, dirp);
if (handle < 0) {
closedir(dirp);
} else {
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 %8llu %s %s", mode,
- st->st_nlink, user, group, (u_int64_t)st->st_size, tbuf, name);
- return xstrdup(buf);
-}
-
-void
+static void
process_readdir(void)
{
DIR *dirp;
id = get_int();
handle = get_handle();
- TRACE("readdir id %d handle %d", id, handle);
+ TRACE("readdir id %u handle %d", id, handle);
dirp = handle_to_dir(handle);
path = handle_to_name(handle);
if (dirp == NULL || path == NULL) {
char pathname[1024];
Stat *stats;
int nstats = 10, count = 0, i;
+
stats = xmalloc(nstats * sizeof(Stat));
while ((dp = readdir(dirp)) != NULL) {
if (count >= nstats) {
stats = xrealloc(stats, nstats * sizeof(Stat));
}
/* XXX OVERFLOW ? */
- snprintf(pathname, sizeof pathname,
- "%s/%s", path, dp->d_name);
+ snprintf(pathname, sizeof pathname, "%s%s%s", path,
+ strcmp(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);
+ stats[count].long_name = ls_file(dp->d_name, &st, 0);
count++;
/* send up to 100 entries in one message */
/* XXX check packet size instead */
}
if (count > 0) {
send_names(id, count, stats);
- for(i = 0; i < count; i++) {
+ for (i = 0; i < count; i++) {
xfree(stats[i].name);
xfree(stats[i].long_name);
}
}
}
-void
+static void
process_remove(void)
{
char *name;
id = get_int();
name = get_string(NULL);
- TRACE("remove id %d name %s", id, name);
+ TRACE("remove id %u name %s", id, name);
ret = unlink(name);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
xfree(name);
}
-void
+static void
process_mkdir(void)
{
Attrib *a;
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);
+ TRACE("mkdir id %u 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
+static void
process_rmdir(void)
{
u_int32_t id;
id = get_int();
name = get_string(NULL);
- TRACE("rmdir id %d name %s", id, name);
+ TRACE("rmdir id %u name %s", id, name);
ret = rmdir(name);
status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
xfree(name);
}
-void
+static void
process_realpath(void)
{
char resolvedname[MAXPATHLEN];
xfree(path);
path = xstrdup(".");
}
- TRACE("realpath id %d path %s", id, path);
+ TRACE("realpath id %u path %s", id, path);
if (realpath(path, resolvedname) == NULL) {
send_status(id, errno_to_portable(errno));
} else {
xfree(path);
}
-void
+static void
process_rename(void)
{
u_int32_t id;
- struct stat st;
char *oldpath, *newpath;
- int ret, status = SSH2_FX_FAILURE;
+ int status;
+ struct stat sb;
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;
+ TRACE("rename id %u old %s new %s", id, oldpath, newpath);
+ status = SSH2_FX_FAILURE;
+ if (lstat(oldpath, &sb) == -1)
+ status = errno_to_portable(errno);
+ else if (S_ISREG(sb.st_mode)) {
+ /* Race-free rename of regular files */
+ if (link(oldpath, newpath) == -1)
+ status = errno_to_portable(errno);
+ else if (unlink(oldpath) == -1) {
+ status = errno_to_portable(errno);
+ /* clean spare link */
+ unlink(newpath);
+ } else
+ status = SSH2_FX_OK;
+ } else if (stat(newpath, &sb) == -1) {
+ if (rename(oldpath, newpath) == -1)
+ status = errno_to_portable(errno);
+ else
+ status = SSH2_FX_OK;
}
send_status(id, status);
xfree(oldpath);
xfree(newpath);
}
-void
+static void
process_readlink(void)
{
u_int32_t id;
+ int len;
char link[MAXPATHLEN];
char *path;
id = get_int();
path = get_string(NULL);
- TRACE("readlink id %d path %s", id, path);
- if (readlink(path, link, sizeof(link) - 1) == -1)
+ TRACE("readlink id %u path %s", id, path);
+ if ((len = readlink(path, link, sizeof(link) - 1)) == -1)
send_status(id, errno_to_portable(errno));
else {
Stat s;
-
- link[sizeof(link) - 1] = '\0';
+
+ link[len] = '\0';
attrib_clear(&s.attrib);
s.name = s.long_name = link;
send_names(id, 1, &s);
xfree(path);
}
-void
+static void
process_symlink(void)
{
u_int32_t id;
- struct stat st;
char *oldpath, *newpath;
- int ret, status = SSH2_FX_FAILURE;
+ int ret, status;
id = get_int();
oldpath = get_string(NULL);
newpath = get_string(NULL);
- TRACE("symlink id %d old %s new %s", id, oldpath, newpath);
- /* fail if 'newpath' exists */
- if (stat(newpath, &st) == -1) {
- ret = symlink(oldpath, newpath);
- status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
- }
+ TRACE("symlink id %u old %s new %s", id, oldpath, newpath);
+ /* this will fail if 'newpath' exists */
+ ret = symlink(oldpath, newpath);
+ status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
send_status(id, status);
xfree(oldpath);
xfree(newpath);
}
-void
+static void
process_extended(void)
{
u_int32_t id;
/* stolen from ssh-agent */
-void
+static void
process(void)
{
u_int msg_len;
+ u_int buf_len;
+ u_int consumed;
u_int type;
u_char *cp;
- if (buffer_len(&iqueue) < 5)
+ buf_len = buffer_len(&iqueue);
+ if (buf_len < 5)
return; /* Incomplete message. */
- cp = (u_char *) buffer_ptr(&iqueue);
+ cp = 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)
+ if (buf_len < msg_len + 4)
return;
buffer_consume(&iqueue, 4);
+ buf_len -= 4;
type = buffer_get_char(&iqueue);
switch (type) {
case SSH2_FXP_INIT:
error("Unknown message %d", type);
break;
}
+ /* discard the remaining bytes from the current packet */
+ if (buf_len < buffer_len(&iqueue))
+ fatal("iqueue grows");
+ consumed = buf_len - buffer_len(&iqueue);
+ if (msg_len < consumed)
+ fatal("msg_len %d < consumed %d", msg_len, consumed);
+ if (msg_len > consumed)
+ buffer_consume(&iqueue, msg_len - consumed);
}
int
int in, out, max;
ssize_t len, olen, set_size;
- __progname = get_progname(av[0]);
+ /* XXX should use getopt */
+
+ __progname = ssh_get_progname(av[0]);
handle_init();
#ifdef DEBUG_SFTP_SERVER
in = dup(STDIN_FILENO);
out = dup(STDOUT_FILENO);
+#ifdef HAVE_CYGWIN
+ setmode(in, O_BINARY);
+ setmode(out, O_BINARY);
+#endif
+
max = 0;
if (in > max)
max = in;
andersk / openssh.git / blobdiff