GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/ssh/sftp-server/../sftp-common.c Lines: 0 123 0.0 %
Date: 2017-11-07 Branches: 0 90 0.0 %

Line Branch Exec Source
1
/* $OpenBSD: sftp-common.c,v 1.30 2017/06/10 06:36:46 djm Exp $ */
2
/*
3
 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
4
 * Copyright (c) 2001 Damien Miller.  All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 * 1. Redistributions of source code must retain the above copyright
10
 *    notice, this list of conditions and the following disclaimer.
11
 * 2. Redistributions in binary form must reproduce the above copyright
12
 *    notice, this list of conditions and the following disclaimer in the
13
 *    documentation and/or other materials provided with the distribution.
14
 *
15
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25
 */
26
27
#include <sys/types.h>
28
#include <sys/stat.h>
29
30
#include <grp.h>
31
#include <pwd.h>
32
#include <stdio.h>
33
#include <string.h>
34
#include <time.h>
35
#include <stdarg.h>
36
#include <stdlib.h>
37
#include <util.h>
38
39
#include "xmalloc.h"
40
#include "ssherr.h"
41
#include "sshbuf.h"
42
#include "log.h"
43
#include "misc.h"
44
45
#include "sftp.h"
46
#include "sftp-common.h"
47
48
/* Clear contents of attributes structure */
49
void
50
attrib_clear(Attrib *a)
51
{
52
	a->flags = 0;
53
	a->size = 0;
54
	a->uid = 0;
55
	a->gid = 0;
56
	a->perm = 0;
57
	a->atime = 0;
58
	a->mtime = 0;
59
}
60
61
/* Convert from struct stat to filexfer attribs */
62
void
63
stat_to_attrib(const struct stat *st, Attrib *a)
64
{
65
	attrib_clear(a);
66
	a->flags = 0;
67
	a->flags |= SSH2_FILEXFER_ATTR_SIZE;
68
	a->size = st->st_size;
69
	a->flags |= SSH2_FILEXFER_ATTR_UIDGID;
70
	a->uid = st->st_uid;
71
	a->gid = st->st_gid;
72
	a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
73
	a->perm = st->st_mode;
74
	a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;
75
	a->atime = st->st_atime;
76
	a->mtime = st->st_mtime;
77
}
78
79
/* Convert from filexfer attribs to struct stat */
80
void
81
attrib_to_stat(const Attrib *a, struct stat *st)
82
{
83
	memset(st, 0, sizeof(*st));
84
85
	if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
86
		st->st_size = a->size;
87
	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
88
		st->st_uid = a->uid;
89
		st->st_gid = a->gid;
90
	}
91
	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
92
		st->st_mode = a->perm;
93
	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
94
		st->st_atime = a->atime;
95
		st->st_mtime = a->mtime;
96
	}
97
}
98
99
/* Decode attributes in buffer */
100
int
101
decode_attrib(struct sshbuf *b, Attrib *a)
102
{
103
	int r;
104
105
	attrib_clear(a);
106
	if ((r = sshbuf_get_u32(b, &a->flags)) != 0)
107
		return r;
108
	if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
109
		if ((r = sshbuf_get_u64(b, &a->size)) != 0)
110
			return r;
111
	}
112
	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
113
		if ((r = sshbuf_get_u32(b, &a->uid)) != 0 ||
114
		    (r = sshbuf_get_u32(b, &a->gid)) != 0)
115
			return r;
116
	}
117
	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
118
		if ((r = sshbuf_get_u32(b, &a->perm)) != 0)
119
			return r;
120
	}
121
	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
122
		if ((r = sshbuf_get_u32(b, &a->atime)) != 0 ||
123
		    (r = sshbuf_get_u32(b, &a->mtime)) != 0)
124
			return r;
125
	}
126
	/* vendor-specific extensions */
127
	if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) {
128
		char *type;
129
		u_char *data;
130
		size_t dlen;
131
		u_int i, count;
132
133
		if ((r = sshbuf_get_u32(b, &count)) != 0)
134
			fatal("%s: buffer error: %s", __func__, ssh_err(r));
135
		for (i = 0; i < count; i++) {
136
			if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
137
			    (r = sshbuf_get_string(b, &data, &dlen)) != 0)
138
				return r;
139
			debug3("Got file attribute \"%.100s\" len %zu",
140
			    type, dlen);
141
			free(type);
142
			free(data);
143
		}
144
	}
145
	return 0;
146
}
147
148
/* Encode attributes to buffer */
149
int
150
encode_attrib(struct sshbuf *b, const Attrib *a)
151
{
152
	int r;
153
154
	if ((r = sshbuf_put_u32(b, a->flags)) != 0)
155
		return r;
156
	if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
157
		if ((r = sshbuf_put_u64(b, a->size)) != 0)
158
			return r;
159
	}
160
	if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
161
		if ((r = sshbuf_put_u32(b, a->uid)) != 0 ||
162
		    (r = sshbuf_put_u32(b, a->gid)) != 0)
163
			return r;
164
	}
165
	if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
166
		if ((r = sshbuf_put_u32(b, a->perm)) != 0)
167
			return r;
168
	}
169
	if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
170
		if ((r = sshbuf_put_u32(b, a->atime)) != 0 ||
171
		    (r = sshbuf_put_u32(b, a->mtime)) != 0)
172
			return r;
173
	}
174
	return 0;
175
}
176
177
/* Convert from SSH2_FX_ status to text error message */
178
const char *
179
fx2txt(int status)
180
{
181
	switch (status) {
182
	case SSH2_FX_OK:
183
		return("No error");
184
	case SSH2_FX_EOF:
185
		return("End of file");
186
	case SSH2_FX_NO_SUCH_FILE:
187
		return("No such file or directory");
188
	case SSH2_FX_PERMISSION_DENIED:
189
		return("Permission denied");
190
	case SSH2_FX_FAILURE:
191
		return("Failure");
192
	case SSH2_FX_BAD_MESSAGE:
193
		return("Bad message");
194
	case SSH2_FX_NO_CONNECTION:
195
		return("No connection");
196
	case SSH2_FX_CONNECTION_LOST:
197
		return("Connection lost");
198
	case SSH2_FX_OP_UNSUPPORTED:
199
		return("Operation unsupported");
200
	default:
201
		return("Unknown status");
202
	}
203
	/* NOTREACHED */
204
}
205
206
/*
207
 * drwxr-xr-x    5 markus   markus       1024 Jan 13 18:39 .ssh
208
 */
209
char *
210
ls_file(const char *name, const struct stat *st, int remote, int si_units)
211
{
212
	int ulen, glen, sz = 0;
213
	struct tm *ltime = localtime(&st->st_mtime);
214
	char *user, *group;
215
	char buf[1024], lc[8], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
216
	char sbuf[FMT_SCALED_STRSIZE];
217
	time_t now;
218
219
	strmode(st->st_mode, mode);
220
	if (remote) {
221
		snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
222
		user = ubuf;
223
		snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
224
		group = gbuf;
225
		strlcpy(lc, "?", sizeof(lc));
226
	} else {
227
		user = user_from_uid(st->st_uid, 0);
228
		group = group_from_gid(st->st_gid, 0);
229
		snprintf(lc, sizeof(lc), "%u", (u_int)st->st_nlink);
230
	}
231
	if (ltime != NULL) {
232
		now = time(NULL);
233
		if (now - (365*24*60*60)/2 < st->st_mtime &&
234
		    now >= st->st_mtime)
235
			sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
236
		else
237
			sz = strftime(tbuf, sizeof tbuf, "%b %e  %Y", ltime);
238
	}
239
	if (sz == 0)
240
		tbuf[0] = '\0';
241
	ulen = MAXIMUM(strlen(user), 8);
242
	glen = MAXIMUM(strlen(group), 8);
243
	if (si_units) {
244
		fmt_scaled((long long)st->st_size, sbuf);
245
		snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8s %s %s",
246
		    mode, lc, ulen, user, glen, group,
247
		    sbuf, tbuf, name);
248
	} else {
249
		snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8llu %s %s",
250
		    mode, lc, ulen, user, glen, group,
251
		    (unsigned long long)st->st_size, tbuf, name);
252
	}
253
	return xstrdup(buf);
254
}