Annotation of src/usr.bin/ssh/sftp-common.c, Revision 1.28
1.28 ! deraadt 1: /* $OpenBSD: sftp-common.c,v 1.27 2015/01/14 13:54:13 djm Exp $ */
1.1 djm 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:
1.28 ! deraadt 27: #include <sys/param.h> /* MAX */
1.11 stevesk 28: #include <sys/types.h>
29: #include <sys/stat.h>
1.14 stevesk 30:
31: #include <grp.h>
1.15 stevesk 32: #include <pwd.h>
1.19 stevesk 33: #include <stdio.h>
1.17 stevesk 34: #include <string.h>
1.16 stevesk 35: #include <time.h>
1.20 deraadt 36: #include <stdarg.h>
1.25 dtucker 37: #include <stdlib.h>
1.21 djm 38: #include <util.h>
1.1 djm 39:
1.20 deraadt 40: #include "xmalloc.h"
1.27 djm 41: #include "ssherr.h"
42: #include "sshbuf.h"
1.1 djm 43: #include "log.h"
44:
45: #include "sftp.h"
46: #include "sftp-common.h"
47:
1.3 markus 48: /* Clear contents of attributes structure */
1.1 djm 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:
1.3 markus 61: /* Convert from struct stat to filexfer attribs */
1.1 djm 62: void
1.10 jakob 63: stat_to_attrib(const struct stat *st, Attrib *a)
1.1 djm 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:
1.7 djm 79: /* Convert from filexfer attribs to struct stat */
80: void
1.10 jakob 81: attrib_to_stat(const Attrib *a, struct stat *st)
1.7 djm 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:
1.3 markus 99: /* Decode attributes in buffer */
1.27 djm 100: int
101: decode_attrib(struct sshbuf *b, Attrib *a)
1.1 djm 102: {
1.27 djm 103: int r;
1.6 deraadt 104:
1.27 djm 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;
1.1 djm 125: }
126: /* vendor-specific extensions */
1.27 djm 127: if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) {
128: char *type;
129: u_char *data;
130: size_t dlen;
131: u_int i, count;
1.6 deraadt 132:
1.27 djm 133: if ((r = sshbuf_get_u32(b, &count)) != 0)
134: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.1 djm 135: for (i = 0; i < count; i++) {
1.27 djm 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);
1.24 djm 141: free(type);
142: free(data);
1.1 djm 143: }
144: }
1.27 djm 145: return 0;
1.1 djm 146: }
147:
1.3 markus 148: /* Encode attributes to buffer */
1.27 djm 149: int
150: encode_attrib(struct sshbuf *b, const Attrib *a)
1.1 djm 151: {
1.27 djm 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: }
1.1 djm 160: if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
1.27 djm 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;
1.1 djm 168: }
169: if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
1.27 djm 170: if ((r = sshbuf_put_u32(b, a->atime)) != 0 ||
171: (r = sshbuf_put_u32(b, a->mtime)) != 0)
172: return r;
1.1 djm 173: }
1.27 djm 174: return 0;
1.1 djm 175: }
176:
1.3 markus 177: /* Convert from SSH2_FX_ status to text error message */
1.1 djm 178: const char *
179: fx2txt(int status)
180: {
181: switch (status) {
182: case SSH2_FX_OK:
1.2 markus 183: return("No error");
1.1 djm 184: case SSH2_FX_EOF:
1.2 markus 185: return("End of file");
1.1 djm 186: case SSH2_FX_NO_SUCH_FILE:
1.2 markus 187: return("No such file or directory");
1.1 djm 188: case SSH2_FX_PERMISSION_DENIED:
1.2 markus 189: return("Permission denied");
1.1 djm 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");
1.5 deraadt 202: }
1.1 djm 203: /* NOTREACHED */
1.7 djm 204: }
205:
206: /*
207: * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
208: */
209: char *
1.21 djm 210: ls_file(const char *name, const struct stat *st, int remote, int si_units)
1.7 djm 211: {
212: int ulen, glen, sz = 0;
213: struct tm *ltime = localtime(&st->st_mtime);
214: char *user, *group;
215: char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
1.21 djm 216: char sbuf[FMT_SCALED_STRSIZE];
1.26 guenther 217: time_t now;
1.7 djm 218:
219: strmode(st->st_mode, mode);
1.22 dtucker 220: if (!remote) {
221: user = user_from_uid(st->st_uid, 0);
1.7 djm 222: } else {
223: snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);
224: user = ubuf;
225: }
1.22 dtucker 226: if (!remote) {
227: group = group_from_gid(st->st_gid, 0);
1.7 djm 228: } else {
229: snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);
230: group = gbuf;
231: }
232: if (ltime != NULL) {
1.26 guenther 233: now = time(NULL);
234: if (now - (365*24*60*60)/2 < st->st_mtime &&
235: now >= st->st_mtime)
1.7 djm 236: sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
237: else
238: sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
239: }
240: if (sz == 0)
241: tbuf[0] = '\0';
242: ulen = MAX(strlen(user), 8);
243: glen = MAX(strlen(group), 8);
1.21 djm 244: if (si_units) {
245: fmt_scaled((long long)st->st_size, sbuf);
246: snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode,
247: (u_int)st->st_nlink, ulen, user, glen, group,
248: sbuf, tbuf, name);
249: } else {
250: snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode,
251: (u_int)st->st_nlink, ulen, user, glen, group,
252: (unsigned long long)st->st_size, tbuf, name);
253: }
1.7 djm 254: return xstrdup(buf);
1.1 djm 255: }
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