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259 lines
6.8 KiB
259 lines
6.8 KiB
/* $OpenBSD: sftp-common.c,v 1.29 2016/09/12 01:22:38 deraadt 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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#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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char *user, *group; |
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char buf[1024], 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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user = user_from_uid(st->st_uid, 0); |
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} else { |
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snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); |
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user = ubuf; |
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} |
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if (!remote) { |
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group = group_from_gid(st->st_gid, 0); |
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} else { |
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snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); |
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group = gbuf; |
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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 %3u %-*s %-*s %8s %s %s", mode, |
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(u_int)st->st_nlink, 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 %3u %-*s %-*s %8llu %s %s", mode, |
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(u_int)st->st_nlink, 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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