source3/modules/vfs_cap.c

   1 /*
   2  * CAP VFS module for Samba 3.x Version 0.3
   3  *
   4  * Copyright (C) Tim Potter, 1999-2000
   5  * Copyright (C) Alexander Bokovoy, 2002-2003
   6  * Copyright (C) Stefan (metze) Metzmacher, 2003
   7  * Copyright (C) TAKAHASHI Motonobu (monyo), 2003
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24
  25 #include "includes.h"
  26
  27 /* cap functions */
  28 static char *capencode(char *to, const char *from);
  29 static char *capdecode(char *to, const char *from);
  30
  31 static SMB_BIG_UINT cap_disk_free(vfs_handle_struct *handle, const char *path,
  32         BOOL small_query, SMB_BIG_UINT *bsize,
  33         SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize)
  34 {
  35         pstring cappath;
  36         capencode(cappath, path);
  37         return SMB_VFS_NEXT_DISK_FREE(handle, cappath, small_query, bsize,
  38                                          dfree, dsize);
  39 }
  40
  41 static SMB_STRUCT_DIR *cap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
  42 {
  43         pstring capname;
  44         capencode(capname, fname);
  45         return SMB_VFS_NEXT_OPENDIR(handle, capname, mask, attr);
  46 }
  47
  48 static SMB_STRUCT_DIRENT *cap_readdir(vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp)
  49 {
  50         SMB_STRUCT_DIRENT *result;
  51         DEBUG(3,("cap: cap_readdir\n"));
  52         result = SMB_VFS_NEXT_READDIR(handle, dirp);
  53         if (result) {
  54           DEBUG(3,("cap: cap_readdir: %s\n", result->d_name));
  55           capdecode(result->d_name, result->d_name);
  56         }
  57         return result;
  58 }
  59
  60 static int cap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
  61 {
  62         pstring cappath;
  63         capencode(cappath, path);
  64         return SMB_VFS_NEXT_MKDIR(handle, cappath, mode);
  65 }
  66
  67 static int cap_rmdir(vfs_handle_struct *handle, const char *path)
  68 {
  69         pstring cappath;
  70         capencode(cappath, path);
  71         return SMB_VFS_NEXT_RMDIR(handle, cappath);
  72 }
  73
  74 static int cap_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
  75 {
  76         pstring capname;
  77         DEBUG(3,("cap: cap_open for %s\n", fname));
  78         capencode(capname, fname);
  79         return SMB_VFS_NEXT_OPEN(handle, capname, fsp, flags, mode);
  80 }
  81
  82 static int cap_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
  83 {
  84         pstring capold, capnew;
  85         capencode(capold, oldname);
  86         capencode(capnew, newname);
  87
  88         return SMB_VFS_NEXT_RENAME(handle, capold, capnew);
  89 }
  90
  91 static int cap_stat(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf)
  92 {
  93         pstring capname;
  94         capencode(capname, fname);
  95         return SMB_VFS_NEXT_STAT(handle, capname, sbuf);
  96 }
  97
  98 static int cap_lstat(vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf)
  99 {
 100         pstring cappath;
 101         capencode(cappath, path);
 102         return SMB_VFS_NEXT_LSTAT(handle, cappath, sbuf);
 103 }
 104
 105 static int cap_unlink(vfs_handle_struct *handle, const char *path)
 106 {
 107         pstring cappath;
 108         capencode(cappath, path);
 109         return SMB_VFS_NEXT_UNLINK(handle, cappath);
 110 }
 111
 112 static int cap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 113 {
 114         pstring cappath;
 115         capencode(cappath, path);
 116         return SMB_VFS_NEXT_CHMOD(handle, cappath, mode);
 117 }
 118
 119 static int cap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 120 {
 121         pstring cappath;
 122         capencode(cappath, path);
 123         return SMB_VFS_NEXT_CHOWN(handle, cappath, uid, gid);
 124 }
 125
 126 static int cap_lchown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 127 {
 128         pstring cappath;
 129         capencode(cappath, path);
 130         return SMB_VFS_NEXT_LCHOWN(handle, cappath, uid, gid);
 131 }
 132
 133 static int cap_chdir(vfs_handle_struct *handle, const char *path)
 134 {
 135         pstring cappath;
 136         DEBUG(3,("cap: cap_chdir for %s\n", path));
 137         capencode(cappath, path);
 138         return SMB_VFS_NEXT_CHDIR(handle, cappath);
 139 }
 140
 141 static int cap_ntimes(vfs_handle_struct *handle, const char *path, const struct timespec ts[2])
 142 {
 143         pstring cappath;
 144         capencode(cappath, path);
 145         return SMB_VFS_NEXT_NTIMES(handle, cappath, ts);
 146 }
 147
 148
 149 static BOOL cap_symlink(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 150 {
 151         pstring capoldpath, capnewpath;
 152         capencode(capoldpath, oldpath);
 153         capencode(capnewpath, newpath);
 154         return SMB_VFS_NEXT_SYMLINK(handle, capoldpath, capnewpath);
 155 }
 156
 157 static BOOL cap_readlink(vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz)
 158 {
 159         pstring cappath;
 160         capencode(cappath, path);
 161         return SMB_VFS_NEXT_READLINK(handle, cappath, buf, bufsiz);
 162 }
 163
 164 static int cap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 165 {
 166         pstring capoldpath, capnewpath;
 167         capencode(capoldpath, oldpath);
 168         capencode(capnewpath, newpath);
 169         return SMB_VFS_NEXT_LINK(handle, capoldpath, capnewpath);
 170 }
 171
 172 static int cap_mknod(vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev)
 173 {
 174         pstring cappath;
 175         capencode(cappath, path);
 176         return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
 177 }
 178
 179 static char *cap_realpath(vfs_handle_struct *handle, const char *path, char *resolved_path)
 180 {
 181         /* monyo need capencode'ed and capdecode'ed? */
 182         pstring cappath;
 183         capencode(cappath, path);
 184         return SMB_VFS_NEXT_REALPATH(handle, path, resolved_path);
 185 }
 186
 187 static BOOL cap_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info_sent, struct security_descriptor *psd)
 188 {
 189         pstring capname;
 190         capencode(capname, name);
 191         return SMB_VFS_NEXT_SET_NT_ACL(handle, fsp, capname, security_info_sent, psd);
 192 }
 193
 194 static int cap_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode)
 195 {
 196         pstring capname;
 197         capencode(capname, name);
 198
 199         /* If the underlying VFS doesn't have ACL support... */
 200         if (!handle->vfs_next.ops.chmod_acl) {
 201                 errno = ENOSYS;
 202                 return -1;
 203         }
 204         return SMB_VFS_NEXT_CHMOD_ACL(handle, capname, mode);
 205 }
 206
 207 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type)
 208 {
 209         pstring cappath_p;
 210         capencode(cappath_p, path_p);
 211         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cappath_p, type);
 212 }
 213
 214 static int cap_sys_acl_set_file(vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 215 {
 216         pstring capname;
 217         capencode(capname, name);
 218         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, capname, acltype, theacl);
 219 }
 220
 221 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
 222 {
 223         pstring cappath;
 224         capencode(cappath, path);
 225         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cappath);
 226 }
 227
 228 static ssize_t cap_getxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t size)
 229 {
 230         pstring cappath, capname;
 231         capencode(cappath, path);
 232         capencode(capname, name);
 233         return SMB_VFS_NEXT_GETXATTR(handle, cappath, capname, value, size);
 234 }
 235
 236 static ssize_t cap_lgetxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t
 237 size)
 238 {
 239         pstring cappath, capname;
 240         capencode(cappath, path);
 241         capencode(capname, name);
 242         return SMB_VFS_NEXT_LGETXATTR(handle, cappath, capname, value, size);
 243 }
 244
 245 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size)
 246 {
 247         pstring capname;
 248         capencode(capname, name);
 249         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, fd, capname, value, size);
 250 }
 251
 252 static ssize_t cap_listxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 253 {
 254         pstring cappath;
 255         capencode(cappath, path);
 256         return SMB_VFS_NEXT_LISTXATTR(handle, cappath, list, size);
 257 }
 258
 259 static ssize_t cap_llistxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 260 {
 261         pstring cappath;
 262         capencode(cappath, path);
 263         return SMB_VFS_NEXT_LLISTXATTR(handle, cappath, list, size);
 264 }
 265
 266 static int cap_removexattr(vfs_handle_struct *handle, const char *path, const char *name)
 267 {
 268         pstring cappath, capname;
 269         capencode(cappath, path);
 270         capencode(capname, name);
 271         return SMB_VFS_NEXT_REMOVEXATTR(handle, cappath, capname);
 272 }
 273
 274 static int cap_lremovexattr(vfs_handle_struct *handle, const char *path, const char *name)
 275 {
 276         pstring cappath, capname;
 277         capencode(cappath, path);
 278         capencode(capname, name);
 279         return SMB_VFS_NEXT_LREMOVEXATTR(handle, cappath, capname);
 280 }
 281
 282 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name)
 283 {
 284         pstring capname;
 285         capencode(capname, name);
 286         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, fd, capname);
 287 }
 288
 289 static int cap_setxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 290 {
 291         pstring cappath, capname;
 292         capencode(cappath, path);
 293         capencode(capname, name);
 294         return SMB_VFS_NEXT_SETXATTR(handle, cappath, capname, value, size, flags);
 295 }
 296
 297 static int cap_lsetxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 298 {
 299         pstring cappath, capname;
 300         capencode(cappath, path);
 301         capencode(capname, name);
 302         return SMB_VFS_NEXT_LSETXATTR(handle, cappath, capname, value, size, flags);
 303 }
 304
 305 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, const void *value, size_t size, int flags)
 306 {
 307         pstring capname;
 308         capencode(capname, name);
 309         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, fd, capname, value, size, flags);
 310 }
 311
 312 /* VFS operations structure */
 313
 314 static vfs_op_tuple cap_op_tuples[] = {
 315
 316         /* Disk operations */
 317
 318         {SMB_VFS_OP(cap_disk_free),                     SMB_VFS_OP_DISK_FREE,           SMB_VFS_LAYER_TRANSPARENT},
 319
 320         /* Directory operations */
 321
 322         {SMB_VFS_OP(cap_opendir),                       SMB_VFS_OP_OPENDIR,             SMB_VFS_LAYER_TRANSPARENT},
 323         {SMB_VFS_OP(cap_readdir),                       SMB_VFS_OP_READDIR,             SMB_VFS_LAYER_TRANSPARENT},
 324         {SMB_VFS_OP(cap_mkdir),                 SMB_VFS_OP_MKDIR,               SMB_VFS_LAYER_TRANSPARENT},
 325         {SMB_VFS_OP(cap_rmdir),                 SMB_VFS_OP_RMDIR,               SMB_VFS_LAYER_TRANSPARENT},
 326
 327         /* File operations */
 328
 329         {SMB_VFS_OP(cap_open),                          SMB_VFS_OP_OPEN,                SMB_VFS_LAYER_TRANSPARENT},
 330         {SMB_VFS_OP(cap_rename),                        SMB_VFS_OP_RENAME,              SMB_VFS_LAYER_TRANSPARENT},
 331         {SMB_VFS_OP(cap_stat),                          SMB_VFS_OP_STAT,                SMB_VFS_LAYER_TRANSPARENT},
 332         {SMB_VFS_OP(cap_lstat),                 SMB_VFS_OP_LSTAT,               SMB_VFS_LAYER_TRANSPARENT},
 333         {SMB_VFS_OP(cap_unlink),                        SMB_VFS_OP_UNLINK,              SMB_VFS_LAYER_TRANSPARENT},
 334         {SMB_VFS_OP(cap_chmod),                 SMB_VFS_OP_CHMOD,               SMB_VFS_LAYER_TRANSPARENT},
 335         {SMB_VFS_OP(cap_chown),                 SMB_VFS_OP_CHOWN,               SMB_VFS_LAYER_TRANSPARENT},
 336         {SMB_VFS_OP(cap_lchown),                SMB_VFS_OP_LCHOWN,              SMB_VFS_LAYER_TRANSPARENT},
 337         {SMB_VFS_OP(cap_chdir),                 SMB_VFS_OP_CHDIR,               SMB_VFS_LAYER_TRANSPARENT},
 338         {SMB_VFS_OP(cap_ntimes),                        SMB_VFS_OP_NTIMES,              SMB_VFS_LAYER_TRANSPARENT},
 339         {SMB_VFS_OP(cap_symlink),                       SMB_VFS_OP_SYMLINK,             SMB_VFS_LAYER_TRANSPARENT},
 340         {SMB_VFS_OP(cap_readlink),                      SMB_VFS_OP_READLINK,            SMB_VFS_LAYER_TRANSPARENT},
 341         {SMB_VFS_OP(cap_link),                          SMB_VFS_OP_LINK,                SMB_VFS_LAYER_TRANSPARENT},
 342         {SMB_VFS_OP(cap_mknod),                 SMB_VFS_OP_MKNOD,               SMB_VFS_LAYER_TRANSPARENT},
 343         {SMB_VFS_OP(cap_realpath),                      SMB_VFS_OP_REALPATH,            SMB_VFS_LAYER_TRANSPARENT},
 344
 345         /* NT File ACL operations */
 346
 347         {SMB_VFS_OP(cap_set_nt_acl),                    SMB_VFS_OP_SET_NT_ACL,          SMB_VFS_LAYER_TRANSPARENT},
 348
 349         /* POSIX ACL operations */
 350
 351         {SMB_VFS_OP(cap_chmod_acl),                     SMB_VFS_OP_CHMOD_ACL,           SMB_VFS_LAYER_TRANSPARENT},
 352
 353         {SMB_VFS_OP(cap_sys_acl_get_file),              SMB_VFS_OP_SYS_ACL_GET_FILE,            SMB_VFS_LAYER_TRANSPARENT},
 354         {SMB_VFS_OP(cap_sys_acl_set_file),              SMB_VFS_OP_SYS_ACL_SET_FILE,            SMB_VFS_LAYER_TRANSPARENT},
 355         {SMB_VFS_OP(cap_sys_acl_delete_def_file),       SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,     SMB_VFS_LAYER_TRANSPARENT},
 356
 357         /* EA operations. */
 358         {SMB_VFS_OP(cap_getxattr),                      SMB_VFS_OP_GETXATTR,                    SMB_VFS_LAYER_TRANSPARENT},
 359         {SMB_VFS_OP(cap_lgetxattr),                     SMB_VFS_OP_LGETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 360         {SMB_VFS_OP(cap_fgetxattr),                     SMB_VFS_OP_FGETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 361         {SMB_VFS_OP(cap_listxattr),                     SMB_VFS_OP_LISTXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 362         {SMB_VFS_OP(cap_llistxattr),                    SMB_VFS_OP_LLISTXATTR,                  SMB_VFS_LAYER_TRANSPARENT},
 363         {SMB_VFS_OP(cap_removexattr),                   SMB_VFS_OP_REMOVEXATTR,                 SMB_VFS_LAYER_TRANSPARENT},
 364         {SMB_VFS_OP(cap_lremovexattr),                  SMB_VFS_OP_LREMOVEXATTR,                SMB_VFS_LAYER_TRANSPARENT},
 365         {SMB_VFS_OP(cap_fremovexattr),                  SMB_VFS_OP_FREMOVEXATTR,                SMB_VFS_LAYER_TRANSPARENT},
 366         {SMB_VFS_OP(cap_setxattr),                      SMB_VFS_OP_SETXATTR,                    SMB_VFS_LAYER_TRANSPARENT},
 367         {SMB_VFS_OP(cap_lsetxattr),                     SMB_VFS_OP_LSETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 368         {SMB_VFS_OP(cap_fsetxattr),                     SMB_VFS_OP_FSETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 369
 370         {NULL,                                          SMB_VFS_OP_NOOP,                        SMB_VFS_LAYER_NOOP}
 371 };
 372
 373 NTSTATUS vfs_cap_init(void);
 374 NTSTATUS vfs_cap_init(void)
 375 {
 376         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap", cap_op_tuples);
 377 }
 378
 379 /* For CAP functions */
 380 #define hex_tag ':'
 381 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 382 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 383 #define is_hex(s)               ((s)[0] == hex_tag)
 384
 385 static unsigned char hex2bin_table[256] = {
 386 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 387 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 388 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 389 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 390 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 391 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 392 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 393 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 394 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 395 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 396 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 397 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 398 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 399 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 400 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 401 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 402 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 403 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 404 };
 405 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 406
 407 /*******************************************************************
 408   original code -> ":xx"  - CAP format
 409 ********************************************************************/
 410 static char *capencode(char *to, const char *from)
 411 {
 412   pstring cvtbuf;
 413   char *out;
 414
 415   if (to == from) {
 416     from = pstrcpy ((char *) cvtbuf, from);
 417   }
 418
 419   for (out = to; *from && (out - to < sizeof(pstring)-7);) {
 420     /* buffer husoku error */
 421     if ((unsigned char)*from >= 0x80) {
 422       *out++ = hex_tag;
 423       *out++ = bin2hex (((*from)>>4)&0x0f);
 424       *out++ = bin2hex ((*from)&0x0f);
 425       from++;
 426     }
 427     else {
 428       *out++ = *from++;
 429     }
 430   }
 431   *out = '\0';
 432   return to;
 433 }
 434
 435 /*******************************************************************
 436   CAP -> original code
 437 ********************************************************************/
 438 /* ":xx" -> a byte */
 439 static char *capdecode(char *to, const char *from)
 440 {
 441   pstring cvtbuf;
 442   char *out;
 443
 444   if (to == from) {
 445     from = pstrcpy ((char *) cvtbuf, from);
 446   }
 447   for (out = to; *from && (out - to < sizeof(pstring)-3);) {
 448     if (is_hex(from)) {
 449       *out++ = (hex2bin (from[1])<<4) | (hex2bin (from[2]));
 450       from += 3;
 451     } else {
 452       *out++ = *from++;
 453     }
 454   }
 455   *out = '\0';
 456   return to;
 457 }