1 /* $OpenBSD: sftp-common.c,v 1.20 2006/08/03 03:34:42 deraadt 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 #include <sys/param.h> 30 31 #include <grp.h> 32 #include <pwd.h> 33 #include <stdio.h> 34 #include <string.h> 35 #include <time.h> 36 #include <stdarg.h> 37 38 #include "xmalloc.h" 39 #include "buffer.h" 40 #include "log.h" 41 42 #include "sftp.h" 43 #include "sftp-common.h" 44 45 /* Clear contents of attributes structure */ 46 void 47 attrib_clear(Attrib *a) 48 { 49 a->flags = 0; 50 a->size = 0; 51 a->uid = 0; 52 a->gid = 0; 53 a->perm = 0; 54 a->atime = 0; 55 a->mtime = 0; 56 } 57 58 /* Convert from struct stat to filexfer attribs */ 59 void 60 stat_to_attrib(const struct stat *st, Attrib *a) 61 { 62 attrib_clear(a); 63 a->flags = 0; 64 a->flags |= SSH2_FILEXFER_ATTR_SIZE; 65 a->size = st->st_size; 66 a->flags |= SSH2_FILEXFER_ATTR_UIDGID; 67 a->uid = st->st_uid; 68 a->gid = st->st_gid; 69 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; 70 a->perm = st->st_mode; 71 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; 72 a->atime = st->st_atime; 73 a->mtime = st->st_mtime; 74 } 75 76 /* Convert from filexfer attribs to struct stat */ 77 void 78 attrib_to_stat(const Attrib *a, struct stat *st) 79 { 80 memset(st, 0, sizeof(*st)); 81 82 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 83 st->st_size = a->size; 84 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 85 st->st_uid = a->uid; 86 st->st_gid = a->gid; 87 } 88 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 89 st->st_mode = a->perm; 90 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 91 st->st_atime = a->atime; 92 st->st_mtime = a->mtime; 93 } 94 } 95 96 /* Decode attributes in buffer */ 97 Attrib * 98 decode_attrib(Buffer *b) 99 { 100 static Attrib a; 101 102 attrib_clear(&a); 103 a.flags = buffer_get_int(b); 104 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) 105 a.size = buffer_get_int64(b); 106 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { 107 a.uid = buffer_get_int(b); 108 a.gid = buffer_get_int(b); 109 } 110 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 111 a.perm = buffer_get_int(b); 112 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 113 a.atime = buffer_get_int(b); 114 a.mtime = buffer_get_int(b); 115 } 116 /* vendor-specific extensions */ 117 if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) { 118 char *type, *data; 119 int i, count; 120 121 count = buffer_get_int(b); 122 for (i = 0; i < count; i++) { 123 type = buffer_get_string(b, NULL); 124 data = buffer_get_string(b, NULL); 125 debug3("Got file attribute \"%s\"", type); 126 xfree(type); 127 xfree(data); 128 } 129 } 130 return &a; 131 } 132 133 /* Encode attributes to buffer */ 134 void 135 encode_attrib(Buffer *b, const Attrib *a) 136 { 137 buffer_put_int(b, a->flags); 138 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 139 buffer_put_int64(b, a->size); 140 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 141 buffer_put_int(b, a->uid); 142 buffer_put_int(b, a->gid); 143 } 144 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 145 buffer_put_int(b, a->perm); 146 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 147 buffer_put_int(b, a->atime); 148 buffer_put_int(b, a->mtime); 149 } 150 } 151 152 /* Convert from SSH2_FX_ status to text error message */ 153 const char * 154 fx2txt(int status) 155 { 156 switch (status) { 157 case SSH2_FX_OK: 158 return("No error"); 159 case SSH2_FX_EOF: 160 return("End of file"); 161 case SSH2_FX_NO_SUCH_FILE: 162 return("No such file or directory"); 163 case SSH2_FX_PERMISSION_DENIED: 164 return("Permission denied"); 165 case SSH2_FX_FAILURE: 166 return("Failure"); 167 case SSH2_FX_BAD_MESSAGE: 168 return("Bad message"); 169 case SSH2_FX_NO_CONNECTION: 170 return("No connection"); 171 case SSH2_FX_CONNECTION_LOST: 172 return("Connection lost"); 173 case SSH2_FX_OP_UNSUPPORTED: 174 return("Operation unsupported"); 175 default: 176 return("Unknown status"); 177 } 178 /* NOTREACHED */ 179 } 180 181 /* 182 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh 183 */ 184 char * 185 ls_file(const char *name, const struct stat *st, int remote) 186 { 187 int ulen, glen, sz = 0; 188 struct passwd *pw; 189 struct group *gr; 190 struct tm *ltime = localtime(&st->st_mtime); 191 char *user, *group; 192 char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; 193 194 strmode(st->st_mode, mode); 195 if (!remote && (pw = getpwuid(st->st_uid)) != NULL) { 196 user = pw->pw_name; 197 } else { 198 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); 199 user = ubuf; 200 } 201 if (!remote && (gr = getgrgid(st->st_gid)) != NULL) { 202 group = gr->gr_name; 203 } else { 204 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); 205 group = gbuf; 206 } 207 if (ltime != NULL) { 208 if (time(NULL) - st->st_mtime < (365*24*60*60)/2) 209 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); 210 else 211 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); 212 } 213 if (sz == 0) 214 tbuf[0] = '\0'; 215 ulen = MAX(strlen(user), 8); 216 glen = MAX(strlen(group), 8); 217 snprintf(buf, sizeof buf, "%s %3u %-*s %-*s %8llu %s %s", mode, 218 (u_int)st->st_nlink, ulen, user, glen, group, 219 (unsigned long long)st->st_size, tbuf, name); 220 return xstrdup(buf); 221 } 222