sftp-common.c revision 294666
1/* $OpenBSD: sftp-common.c,v 1.26 2014/01/09 03:26:00 guenther 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 "includes.h" 28__RCSID("$FreeBSD: stable/10/crypto/openssh/sftp-common.c 294666 2016-01-24 15:44:57Z des $"); 29 30#include <sys/types.h> 31#include <sys/stat.h> 32#include <sys/param.h> 33 34#include <grp.h> 35#include <pwd.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <time.h> 40#include <stdarg.h> 41#ifdef HAVE_UTIL_H 42#include <util.h> 43#endif 44 45#include "xmalloc.h" 46#include "buffer.h" 47#include "log.h" 48 49#include "sftp.h" 50#include "sftp-common.h" 51 52/* Clear contents of attributes structure */ 53void 54attrib_clear(Attrib *a) 55{ 56 a->flags = 0; 57 a->size = 0; 58 a->uid = 0; 59 a->gid = 0; 60 a->perm = 0; 61 a->atime = 0; 62 a->mtime = 0; 63} 64 65/* Convert from struct stat to filexfer attribs */ 66void 67stat_to_attrib(const struct stat *st, Attrib *a) 68{ 69 attrib_clear(a); 70 a->flags = 0; 71 a->flags |= SSH2_FILEXFER_ATTR_SIZE; 72 a->size = st->st_size; 73 a->flags |= SSH2_FILEXFER_ATTR_UIDGID; 74 a->uid = st->st_uid; 75 a->gid = st->st_gid; 76 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; 77 a->perm = st->st_mode; 78 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; 79 a->atime = st->st_atime; 80 a->mtime = st->st_mtime; 81} 82 83/* Convert from filexfer attribs to struct stat */ 84void 85attrib_to_stat(const Attrib *a, struct stat *st) 86{ 87 memset(st, 0, sizeof(*st)); 88 89 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 90 st->st_size = a->size; 91 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 92 st->st_uid = a->uid; 93 st->st_gid = a->gid; 94 } 95 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 96 st->st_mode = a->perm; 97 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 98 st->st_atime = a->atime; 99 st->st_mtime = a->mtime; 100 } 101} 102 103/* Decode attributes in buffer */ 104Attrib * 105decode_attrib(Buffer *b) 106{ 107 static Attrib a; 108 109 attrib_clear(&a); 110 a.flags = buffer_get_int(b); 111 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) 112 a.size = buffer_get_int64(b); 113 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { 114 a.uid = buffer_get_int(b); 115 a.gid = buffer_get_int(b); 116 } 117 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 118 a.perm = buffer_get_int(b); 119 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 120 a.atime = buffer_get_int(b); 121 a.mtime = buffer_get_int(b); 122 } 123 /* vendor-specific extensions */ 124 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) { 125 char *type, *data; 126 int i, count; 127 128 count = buffer_get_int(b); 129 for (i = 0; i < count; i++) { 130 type = buffer_get_string(b, NULL); 131 data = buffer_get_string(b, NULL); 132 debug3("Got file attribute \"%s\"", type); 133 free(type); 134 free(data); 135 } 136 } 137 return &a; 138} 139 140/* Encode attributes to buffer */ 141void 142encode_attrib(Buffer *b, const Attrib *a) 143{ 144 buffer_put_int(b, a->flags); 145 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 146 buffer_put_int64(b, a->size); 147 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 148 buffer_put_int(b, a->uid); 149 buffer_put_int(b, a->gid); 150 } 151 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 152 buffer_put_int(b, a->perm); 153 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 154 buffer_put_int(b, a->atime); 155 buffer_put_int(b, a->mtime); 156 } 157} 158 159/* Convert from SSH2_FX_ status to text error message */ 160const char * 161fx2txt(int status) 162{ 163 switch (status) { 164 case SSH2_FX_OK: 165 return("No error"); 166 case SSH2_FX_EOF: 167 return("End of file"); 168 case SSH2_FX_NO_SUCH_FILE: 169 return("No such file or directory"); 170 case SSH2_FX_PERMISSION_DENIED: 171 return("Permission denied"); 172 case SSH2_FX_FAILURE: 173 return("Failure"); 174 case SSH2_FX_BAD_MESSAGE: 175 return("Bad message"); 176 case SSH2_FX_NO_CONNECTION: 177 return("No connection"); 178 case SSH2_FX_CONNECTION_LOST: 179 return("Connection lost"); 180 case SSH2_FX_OP_UNSUPPORTED: 181 return("Operation unsupported"); 182 default: 183 return("Unknown status"); 184 } 185 /* NOTREACHED */ 186} 187 188/* 189 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh 190 */ 191char * 192ls_file(const char *name, const struct stat *st, int remote, int si_units) 193{ 194 int ulen, glen, sz = 0; 195 struct tm *ltime = localtime(&st->st_mtime); 196 const char *user, *group; 197 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; 198 char sbuf[FMT_SCALED_STRSIZE]; 199 time_t now; 200 201 strmode(st->st_mode, mode); 202 if (!remote) { 203 user = user_from_uid(st->st_uid, 0); 204 } else { 205 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); 206 user = ubuf; 207 } 208 if (!remote) { 209 group = group_from_gid(st->st_gid, 0); 210 } else { 211 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); 212 group = gbuf; 213 } 214 if (ltime != NULL) { 215 now = time(NULL); 216 if (now - (365*24*60*60)/2 < st->st_mtime && 217 now >= st->st_mtime) 218 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); 219 else 220 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); 221 } 222 if (sz == 0) 223 tbuf[0] = '\0'; 224 ulen = MAX(strlen(user), 8); 225 glen = MAX(strlen(group), 8); 226 if (si_units) { 227 fmt_scaled((long long)st->st_size, sbuf); 228 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8s %s %s", mode, 229 (u_int)st->st_nlink, ulen, user, glen, group, 230 sbuf, tbuf, name); 231 } else { 232 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode, 233 (u_int)st->st_nlink, ulen, user, glen, group, 234 (unsigned long long)st->st_size, tbuf, name); 235 } 236 return xstrdup(buf); 237} 238