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      1 /*
      2  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
      3  * Copyright (c) 2001 Damien Miller.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 /* $OpenBSD: sftp-common.c,v 1.20 2006/08/03 03:34:42 deraadt Exp $ */
     27 
     28 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     29 
     30 #include "includes.h"
     31 
     32 #include <sys/types.h>
     33 #include <sys/stat.h>
     34 #include <sys/param.h>
     35 
     36 #include <grp.h>
     37 #include <pwd.h>
     38 #include <stdio.h>
     39 #include <string.h>
     40 #include <time.h>
     41 #include <stdarg.h>
     42 
     43 #include "xmalloc.h"
     44 #include "buffer.h"
     45 #include "bufaux.h"
     46 #include "log.h"
     47 
     48 #include "sftp.h"
     49 #include "sftp-common.h"
     50 
     51 /* Clear contents of attributes structure */
     52 void
     53 attrib_clear(Attrib *a)
     54 {
     55 	a->flags = 0;
     56 	a->size = 0;
     57 	a->uid = 0;
     58 	a->gid = 0;
     59 	a->perm = 0;
     60 	a->atime = 0;
     61 	a->mtime = 0;
     62 }
     63 
     64 /* Convert from struct stat to filexfer attribs */
     65 void
     66 stat_to_attrib(const struct stat *st, Attrib *a)
     67 {
     68 	attrib_clear(a);
     69 	a->flags = 0;
     70 	a->flags |= SSH2_FILEXFER_ATTR_SIZE;
     71 	a->size = st->st_size;
     72 	a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
     73 	a->uid = st->st_uid;
     74 	a->gid = st->st_gid;
     75 	a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
     76 	a->perm = st->st_mode;
     77 	a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
     78 	a->atime = st->st_atime;
     79 	a->mtime = st->st_mtime;
     80 }
     81 
     82 /* Convert from filexfer attribs to struct stat */
     83 void
     84 attrib_to_stat(const Attrib *a, struct stat *st)
     85 {
     86 	memset(st, 0, sizeof(*st));
     87 
     88 	if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
     89 		st->st_size = a->size;
     90 	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
     91 		st->st_uid = a->uid;
     92 		st->st_gid = a->gid;
     93 	}
     94 	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
     95 		st->st_mode = a->perm;
     96 	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
     97 		st->st_atime = a->atime;
     98 		st->st_mtime = a->mtime;
     99 	}
    100 }
    101 
    102 /* Decode attributes in buffer */
    103 Attrib *
    104 decode_attrib(Buffer *b)
    105 {
    106 	static Attrib a;
    107 
    108 	attrib_clear(&a);
    109 	a.flags = buffer_get_int(b);
    110 	if (a.flags & SSH2_FILEXFER_ATTR_SIZE)
    111 		a.size = buffer_get_int64(b);
    112 	if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
    113 		a.uid = buffer_get_int(b);
    114 		a.gid = buffer_get_int(b);
    115 	}
    116 	if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
    117 		a.perm = buffer_get_int(b);
    118 	if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
    119 		a.atime = buffer_get_int(b);
    120 		a.mtime = buffer_get_int(b);
    121 	}
    122 	/* vendor-specific extensions */
    123 	if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) {
    124 		char *type, *data;
    125 		int i, count;
    126 
    127 		count = buffer_get_int(b);
    128 		for (i = 0; i < count; i++) {
    129 			type = buffer_get_string(b, NULL);
    130 			data = buffer_get_string(b, NULL);
    131 			debug3("Got file attribute \"%s\"", type);
    132 			xfree(type);
    133 			xfree(data);
    134 		}
    135 	}
    136 	return &a;
    137 }
    138 
    139 /* Encode attributes to buffer */
    140 void
    141 encode_attrib(Buffer *b, const Attrib *a)
    142 {
    143 	buffer_put_int(b, a->flags);
    144 	if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
    145 		buffer_put_int64(b, a->size);
    146 	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
    147 		buffer_put_int(b, a->uid);
    148 		buffer_put_int(b, a->gid);
    149 	}
    150 	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
    151 		buffer_put_int(b, a->perm);
    152 	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
    153 		buffer_put_int(b, a->atime);
    154 		buffer_put_int(b, a->mtime);
    155 	}
    156 }
    157 
    158 /* Convert from SSH2_FX_ status to text error message */
    159 const char *
    160 fx2txt(int status)
    161 {
    162 	switch (status) {
    163 	case SSH2_FX_OK:
    164 		return(gettext("No error"));
    165 	case SSH2_FX_EOF:
    166 		return(gettext("End of file"));
    167 	case SSH2_FX_NO_SUCH_FILE:
    168 		return(gettext("No such file or directory"));
    169 	case SSH2_FX_PERMISSION_DENIED:
    170 		return(gettext("Permission denied"));
    171 	case SSH2_FX_FAILURE:
    172 		return(gettext("Failure"));
    173 	case SSH2_FX_BAD_MESSAGE:
    174 		return(gettext("Bad message"));
    175 	case SSH2_FX_NO_CONNECTION:
    176 		return(gettext("No connection"));
    177 	case SSH2_FX_CONNECTION_LOST:
    178 		return(gettext("Connection lost"));
    179 	case SSH2_FX_OP_UNSUPPORTED:
    180 		return(gettext("Operation unsupported"));
    181 	default:
    182 		return(gettext("Unknown status"));
    183 	}
    184 	/* NOTREACHED */
    185 }
    186 
    187 /*
    188  * drwxr-xr-x    5 markus   markus       1024 Jan 13 18:39 .ssh
    189  */
    190 char *
    191 ls_file(const char *name, const struct stat *st, int remote)
    192 {
    193 	int ulen, glen, sz = 0;
    194 	struct passwd *pw;
    195 	struct group *gr;
    196 	struct tm *ltime = localtime(&st->st_mtime);
    197 	char *user, *group;
    198 	char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
    199 
    200 	strmode(st->st_mode, mode);
    201 	if (!remote && (pw = getpwuid(st->st_uid)) != NULL) {
    202 		user = pw->pw_name;
    203 	} else {
    204 		snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
    205 		user = ubuf;
    206 	}
    207 	if (!remote && (gr = getgrgid(st->st_gid)) != NULL) {
    208 		group = gr->gr_name;
    209 	} else {
    210 		snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
    211 		group = gbuf;
    212 	}
    213 	if (ltime != NULL) {
    214 		if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
    215 			sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
    216 		else
    217 			sz = strftime(tbuf, sizeof tbuf, "%b %e  %Y", ltime);
    218 	}
    219 	if (sz == 0)
    220 		tbuf[0] = '\0';
    221 	ulen = MAX(strlen(user), 8);
    222 	glen = MAX(strlen(group), 8);
    223 	snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
    224 	    (u_int)st->st_nlink, ulen, user, glen, group,
    225 	    (unsigned long long)st->st_size, tbuf, name);
    226 	return xstrdup(buf);
    227 }
    228