1 /* $NetBSD: sftp-common.c,v 1.15 2026/04/08 18:58:41 christos Exp $ */ 2 /* $OpenBSD: sftp-common.c,v 1.36 2026/02/11 17:05:32 dtucker Exp $ */ 3 4 /* 5 * Copyright (c) 2001 Markus Friedl. All rights reserved. 6 * Copyright (c) 2001 Damien Miller. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "includes.h" 30 __RCSID("$NetBSD: sftp-common.c,v 1.15 2026/04/08 18:58:41 christos Exp $"); 31 32 #include <sys/param.h> /* MAX */ 33 #include <sys/types.h> 34 #include <sys/stat.h> 35 36 #include <grp.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <stdarg.h> 41 #include <unistd.h> 42 #include <stdlib.h> 43 #include <time.h> 44 #include <unistd.h> 45 #include <util.h> 46 47 #include "xmalloc.h" 48 #include "ssherr.h" 49 #include "sshbuf.h" 50 #include "log.h" 51 #include "misc.h" 52 53 #include "sftp.h" 54 #include "sftp-common.h" 55 #include "fmt_scaled.h" 56 57 /* Clear contents of attributes structure */ 58 void 59 attrib_clear(Attrib *a) 60 { 61 a->flags = 0; 62 a->size = 0; 63 a->uid = 0; 64 a->gid = 0; 65 a->perm = 0; 66 a->atime = 0; 67 a->mtime = 0; 68 } 69 70 /* Convert from struct stat to filexfer attribs */ 71 void 72 stat_to_attrib(const struct stat *st, Attrib *a) 73 { 74 attrib_clear(a); 75 a->flags = 0; 76 a->flags |= SSH2_FILEXFER_ATTR_SIZE; 77 a->size = st->st_size; 78 a->flags |= SSH2_FILEXFER_ATTR_UIDGID; 79 a->uid = st->st_uid; 80 a->gid = st->st_gid; 81 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS; 82 a->perm = st->st_mode; 83 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME; 84 a->atime = st->st_atime; 85 a->mtime = st->st_mtime; 86 } 87 88 /* Convert from filexfer attribs to struct stat */ 89 void 90 attrib_to_stat(const Attrib *a, struct stat *st) 91 { 92 memset(st, 0, sizeof(*st)); 93 94 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) 95 st->st_size = a->size; 96 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 97 st->st_uid = a->uid; 98 st->st_gid = a->gid; 99 } 100 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) 101 st->st_mode = a->perm; 102 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 103 st->st_atime = a->atime; 104 st->st_mtime = a->mtime; 105 } 106 } 107 108 /* Decode attributes in buffer */ 109 int 110 decode_attrib(struct sshbuf *b, Attrib *a) 111 { 112 int r; 113 114 attrib_clear(a); 115 if ((r = sshbuf_get_u32(b, &a->flags)) != 0) 116 return r; 117 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { 118 if ((r = sshbuf_get_u64(b, &a->size)) != 0) 119 return r; 120 } 121 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 122 if ((r = sshbuf_get_u32(b, &a->uid)) != 0 || 123 (r = sshbuf_get_u32(b, &a->gid)) != 0) 124 return r; 125 } 126 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { 127 if ((r = sshbuf_get_u32(b, &a->perm)) != 0) 128 return r; 129 } 130 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 131 if ((r = sshbuf_get_u32(b, &a->atime)) != 0 || 132 (r = sshbuf_get_u32(b, &a->mtime)) != 0) 133 return r; 134 } 135 /* vendor-specific extensions */ 136 if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) { 137 char *type; 138 u_char *data; 139 size_t dlen; 140 u_int i, count; 141 142 if ((r = sshbuf_get_u32(b, &count)) != 0) 143 return r; 144 if (count > 0x100000) 145 return SSH_ERR_INVALID_FORMAT; 146 for (i = 0; i < count; i++) { 147 if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 || 148 (r = sshbuf_get_string(b, &data, &dlen)) != 0) 149 return r; 150 debug3("Got file attribute \"%.100s\" len %zu", 151 type, dlen); 152 free(type); 153 free(data); 154 } 155 } 156 return 0; 157 } 158 159 /* Encode attributes to buffer */ 160 int 161 encode_attrib(struct sshbuf *b, const Attrib *a) 162 { 163 int r; 164 165 if ((r = sshbuf_put_u32(b, a->flags)) != 0) 166 return r; 167 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { 168 if ((r = sshbuf_put_u64(b, a->size)) != 0) 169 return r; 170 } 171 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { 172 if ((r = sshbuf_put_u32(b, a->uid)) != 0 || 173 (r = sshbuf_put_u32(b, a->gid)) != 0) 174 return r; 175 } 176 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { 177 if ((r = sshbuf_put_u32(b, a->perm)) != 0) 178 return r; 179 } 180 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { 181 if ((r = sshbuf_put_u32(b, a->atime)) != 0 || 182 (r = sshbuf_put_u32(b, a->mtime)) != 0) 183 return r; 184 } 185 return 0; 186 } 187 188 /* Convert from SSH2_FX_ status to text error message */ 189 const char * 190 fx2txt(int status) 191 { 192 switch (status) { 193 case SSH2_FX_OK: 194 return("No error"); 195 case SSH2_FX_EOF: 196 return("End of file"); 197 case SSH2_FX_NO_SUCH_FILE: 198 return("No such file or directory"); 199 case SSH2_FX_PERMISSION_DENIED: 200 return("Permission denied"); 201 case SSH2_FX_FAILURE: 202 return("Failure"); 203 case SSH2_FX_BAD_MESSAGE: 204 return("Bad message"); 205 case SSH2_FX_NO_CONNECTION: 206 return("No connection"); 207 case SSH2_FX_CONNECTION_LOST: 208 return("Connection lost"); 209 case SSH2_FX_OP_UNSUPPORTED: 210 return("Operation unsupported"); 211 default: 212 return("Unknown status"); 213 } 214 /* NOTREACHED */ 215 } 216 217 /* 218 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh 219 */ 220 char * 221 ls_file(const char *name, const struct stat *st, int remote, int si_units, 222 const char *user, const char *group) 223 { 224 int ulen, glen, sz = 0; 225 struct tm *ltime = localtime(&st->st_mtime); 226 char buf[1024], lc[8], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; 227 char sbuf[FMT_SCALED_STRSIZE]; 228 time_t now; 229 230 strmode(st->st_mode, mode); 231 if (remote) { 232 if (user == NULL) { 233 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); 234 user = ubuf; 235 } 236 if (group == NULL) { 237 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid); 238 group = gbuf; 239 } 240 strlcpy(lc, "?", sizeof(lc)); 241 } else { 242 user = user_from_uid(st->st_uid, 0); 243 group = group_from_gid(st->st_gid, 0); 244 snprintf(lc, sizeof(lc), "%u", (u_int)st->st_nlink); 245 } 246 if (ltime != NULL) { 247 now = time(NULL); 248 if (now - (365*24*60*60)/2 < st->st_mtime && 249 now >= st->st_mtime) 250 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); 251 else 252 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); 253 } 254 if (sz == 0) 255 tbuf[0] = '\0'; 256 ulen = MAXIMUM(strlen(user), 8); 257 glen = MAXIMUM(strlen(group), 8); 258 if (si_units) { 259 fmt_scaled((long long)st->st_size, sbuf); 260 snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8s %s %s", 261 mode, lc, ulen, user, glen, group, 262 sbuf, tbuf, name); 263 } else { 264 snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8llu %s %s", 265 mode, lc, ulen, user, glen, group, 266 (unsigned long long)st->st_size, tbuf, name); 267 } 268 return xstrdup(buf); 269 } 270
Indexes created Thu Jun 18 00:24:58 UTC 2026