source/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  * Copyright (C) Jeremy Allison, 2007
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "includes.h"
  26
  27 /* cap functions */
  28 static char *capencode(TALLOC_CTX *ctx, const char *from);
  29 static char *capdecode(TALLOC_CTX *ctx, 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         char *cappath = capencode(talloc_tos(), path);
  36
  37         if (!cappath) {
  38                 errno = ENOMEM;
  39                 return (SMB_BIG_UINT)-1;
  40         }
  41         return SMB_VFS_NEXT_DISK_FREE(handle, cappath, small_query, bsize,
  42                                         dfree, dsize);
  43 }
  44
  45 static SMB_STRUCT_DIR *cap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
  46 {
  47         char *capname = capencode(talloc_tos(), fname);
  48
  49         if (!capname) {
  50                 errno = ENOMEM;
  51                 return NULL;
  52         }
  53         return SMB_VFS_NEXT_OPENDIR(handle, capname, mask, attr);
  54 }
  55
  56 static SMB_STRUCT_DIRENT *cap_readdir(vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp)
  57 {
  58         SMB_STRUCT_DIRENT *result;
  59         SMB_STRUCT_DIRENT *newdirent;
  60         char *newname;
  61         size_t newnamelen;
  62         DEBUG(3,("cap: cap_readdir\n"));
  63
  64         result = SMB_VFS_NEXT_READDIR(handle, dirp);
  65         if (!result) {
  66                 return NULL;
  67         }
  68
  69         newname = capdecode(talloc_tos(), result->d_name);
  70         if (!newname) {
  71                 return NULL;
  72         }
  73         DEBUG(3,("cap: cap_readdir: %s\n", newname));
  74         newnamelen = strlen(newname)+1;
  75         newdirent = (SMB_STRUCT_DIRENT *)TALLOC_ARRAY(talloc_tos(),
  76                         char,
  77                         sizeof(SMB_STRUCT_DIRENT)+
  78                                 newnamelen);
  79         if (!newdirent) {
  80                 return NULL;
  81         }
  82         memcpy(newdirent, result, sizeof(SMB_STRUCT_DIRENT));
  83         memcpy(&newdirent->d_name, newname, newnamelen);
  84         return newdirent;
  85 }
  86
  87 static int cap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
  88 {
  89         char *cappath = capencode(talloc_tos(), path);
  90
  91         if (!cappath) {
  92                 errno = ENOMEM;
  93                 return -1;
  94         }
  95         return SMB_VFS_NEXT_MKDIR(handle, cappath, mode);
  96 }
  97
  98 static int cap_rmdir(vfs_handle_struct *handle, const char *path)
  99 {
 100         char *cappath = capencode(talloc_tos(), path);
 101
 102         if (!cappath) {
 103                 errno = ENOMEM;
 104                 return -1;
 105         }
 106         return SMB_VFS_NEXT_RMDIR(handle, cappath);
 107 }
 108
 109 static int cap_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
 110 {
 111         char *cappath = capencode(talloc_tos(), fname);
 112
 113         if (!cappath) {
 114                 errno = ENOMEM;
 115                 return -1;
 116         }
 117         DEBUG(3,("cap: cap_open for %s\n", fname));
 118         return SMB_VFS_NEXT_OPEN(handle, cappath, fsp, flags, mode);
 119 }
 120
 121 static int cap_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
 122 {
 123         char *capold = capencode(talloc_tos(), oldname);
 124         char *capnew = capencode(talloc_tos(), newname);
 125
 126         if (!capold || !capnew) {
 127                 errno = ENOMEM;
 128                 return -1;
 129         }
 130         return SMB_VFS_NEXT_RENAME(handle, capold, capnew);
 131 }
 132
 133 static int cap_stat(vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf)
 134 {
 135         char *cappath = capencode(talloc_tos(), path);
 136
 137         if (!cappath) {
 138                 errno = ENOMEM;
 139                 return -1;
 140         }
 141         return SMB_VFS_NEXT_STAT(handle, cappath, sbuf);
 142 }
 143
 144 static int cap_lstat(vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf)
 145 {
 146         char *cappath = capencode(talloc_tos(), path);
 147
 148         if (!cappath) {
 149                 errno = ENOMEM;
 150                 return -1;
 151         }
 152         return SMB_VFS_NEXT_LSTAT(handle, cappath, sbuf);
 153 }
 154
 155 static int cap_unlink(vfs_handle_struct *handle, const char *path)
 156 {
 157         char *cappath = capencode(talloc_tos(), path);
 158
 159         if (!cappath) {
 160                 errno = ENOMEM;
 161                 return -1;
 162         }
 163         return SMB_VFS_NEXT_UNLINK(handle, cappath);
 164 }
 165
 166 static int cap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 167 {
 168         char *cappath = capencode(talloc_tos(), path);
 169
 170         if (!cappath) {
 171                 errno = ENOMEM;
 172                 return -1;
 173         }
 174         return SMB_VFS_NEXT_CHMOD(handle, cappath, mode);
 175 }
 176
 177 static int cap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 178 {
 179         char *cappath = capencode(talloc_tos(), path);
 180
 181         if (!cappath) {
 182                 errno = ENOMEM;
 183                 return -1;
 184         }
 185         return SMB_VFS_NEXT_CHOWN(handle, cappath, uid, gid);
 186 }
 187
 188 static int cap_lchown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 189 {
 190         char *cappath = capencode(talloc_tos(), path);
 191
 192         if (!cappath) {
 193                 errno = ENOMEM;
 194                 return -1;
 195         }
 196         return SMB_VFS_NEXT_LCHOWN(handle, cappath, uid, gid);
 197 }
 198
 199 static int cap_chdir(vfs_handle_struct *handle, const char *path)
 200 {
 201         char *cappath = capencode(talloc_tos(), path);
 202
 203         if (!cappath) {
 204                 errno = ENOMEM;
 205                 return -1;
 206         }
 207         DEBUG(3,("cap: cap_chdir for %s\n", path));
 208         return SMB_VFS_NEXT_CHDIR(handle, cappath);
 209 }
 210
 211 static int cap_ntimes(vfs_handle_struct *handle, const char *path, const struct timespec ts[2])
 212 {
 213         char *cappath = capencode(talloc_tos(), path);
 214
 215         if (!cappath) {
 216                 errno = ENOMEM;
 217                 return -1;
 218         }
 219         return SMB_VFS_NEXT_NTIMES(handle, cappath, ts);
 220 }
 221
 222
 223 static bool cap_symlink(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 224 {
 225         char *capold = capencode(talloc_tos(), oldpath);
 226         char *capnew = capencode(talloc_tos(), newpath);
 227
 228         if (!capold || !capnew) {
 229                 errno = ENOMEM;
 230                 return -1;
 231         }
 232         return SMB_VFS_NEXT_SYMLINK(handle, capold, capnew);
 233 }
 234
 235 static bool cap_readlink(vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz)
 236 {
 237         char *cappath = capencode(talloc_tos(), path);
 238
 239         if (!cappath) {
 240                 errno = ENOMEM;
 241                 return -1;
 242         }
 243         return SMB_VFS_NEXT_READLINK(handle, cappath, buf, bufsiz);
 244 }
 245
 246 static int cap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 247 {
 248         char *capold = capencode(talloc_tos(), oldpath);
 249         char *capnew = capencode(talloc_tos(), newpath);
 250
 251         if (!capold || !capnew) {
 252                 errno = ENOMEM;
 253                 return -1;
 254         }
 255         return SMB_VFS_NEXT_LINK(handle, capold, capnew);
 256 }
 257
 258 static int cap_mknod(vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev)
 259 {
 260         char *cappath = capencode(talloc_tos(), path);
 261
 262         if (!cappath) {
 263                 errno = ENOMEM;
 264                 return -1;
 265         }
 266         return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
 267 }
 268
 269 static char *cap_realpath(vfs_handle_struct *handle, const char *path, char *resolved_path)
 270 {
 271         /* monyo need capencode'ed and capdecode'ed? */
 272         char *cappath = capencode(talloc_tos(), path);
 273
 274         if (!cappath) {
 275                 errno = ENOMEM;
 276                 return NULL;
 277         }
 278         return SMB_VFS_NEXT_REALPATH(handle, path, resolved_path);
 279 }
 280
 281 static NTSTATUS cap_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *path, uint32 security_info_sent, struct security_descriptor *psd)
 282 {
 283         char *cappath = capencode(talloc_tos(), path);
 284
 285         if (!cappath) {
 286                 errno = ENOMEM;
 287                 return NT_STATUS_NO_MEMORY;
 288         }
 289         return SMB_VFS_NEXT_SET_NT_ACL(handle, fsp, cappath, security_info_sent, psd);
 290 }
 291
 292 static int cap_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 293 {
 294         char *cappath = capencode(talloc_tos(), path);
 295
 296         /* If the underlying VFS doesn't have ACL support... */
 297         if (!handle->vfs_next.ops.chmod_acl) {
 298                 errno = ENOSYS;
 299                 return -1;
 300         }
 301         if (!cappath) {
 302                 errno = ENOMEM;
 303                 return -1;
 304         }
 305         return SMB_VFS_NEXT_CHMOD_ACL(handle, cappath, mode);
 306 }
 307
 308 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle, const char *path, SMB_ACL_TYPE_T type)
 309 {
 310         char *cappath = capencode(talloc_tos(), path);
 311
 312         if (!cappath) {
 313                 errno = ENOMEM;
 314                 return (SMB_ACL_T)NULL;
 315         }
 316         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cappath, type);
 317 }
 318
 319 static int cap_sys_acl_set_file(vfs_handle_struct *handle, const char *path, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 320 {
 321         char *cappath = capencode(talloc_tos(), path);
 322
 323         if (!cappath) {
 324                 errno = ENOMEM;
 325                 return -1;
 326         }
 327         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, cappath, acltype, theacl);
 328 }
 329
 330 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
 331 {
 332         char *cappath = capencode(talloc_tos(), path);
 333
 334         if (!cappath) {
 335                 errno = ENOMEM;
 336                 return -1;
 337         }
 338         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cappath);
 339 }
 340
 341 static ssize_t cap_getxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t size)
 342 {
 343         char *cappath = capencode(talloc_tos(), path);
 344         char *capname = capencode(talloc_tos(), name);
 345
 346         if (!cappath || !capname) {
 347                 errno = ENOMEM;
 348                 return -1;
 349         }
 350         return SMB_VFS_NEXT_GETXATTR(handle, cappath, capname, value, size);
 351 }
 352
 353 static ssize_t cap_lgetxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t
 354 size)
 355 {
 356         char *cappath = capencode(talloc_tos(), path);
 357         char *capname = capencode(talloc_tos(), name);
 358
 359         if (!cappath || !capname) {
 360                 errno = ENOMEM;
 361                 return -1;
 362         }
 363         return SMB_VFS_NEXT_LGETXATTR(handle, cappath, capname, value, size);
 364 }
 365
 366 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
 367 {
 368         char *cappath = capencode(talloc_tos(), path);
 369
 370         if (!cappath) {
 371                 errno = ENOMEM;
 372                 return -1;
 373         }
 374         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
 375 }
 376
 377 static ssize_t cap_listxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 378 {
 379         char *cappath = capencode(talloc_tos(), path);
 380
 381         if (!cappath) {
 382                 errno = ENOMEM;
 383                 return -1;
 384         }
 385         return SMB_VFS_NEXT_LISTXATTR(handle, cappath, list, size);
 386 }
 387
 388 static ssize_t cap_llistxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 389 {
 390         char *cappath = capencode(talloc_tos(), path);
 391
 392         if (!cappath) {
 393                 errno = ENOMEM;
 394                 return -1;
 395         }
 396         return SMB_VFS_NEXT_LLISTXATTR(handle, cappath, list, size);
 397 }
 398
 399 static int cap_removexattr(vfs_handle_struct *handle, const char *path, const char *name)
 400 {
 401         char *cappath = capencode(talloc_tos(), path);
 402         char *capname = capencode(talloc_tos(), name);
 403
 404         if (!cappath || !capname) {
 405                 errno = ENOMEM;
 406                 return -1;
 407         }
 408         return SMB_VFS_NEXT_REMOVEXATTR(handle, cappath, capname);
 409 }
 410
 411 static int cap_lremovexattr(vfs_handle_struct *handle, const char *path, const char *name)
 412 {
 413         char *cappath = capencode(talloc_tos(), path);
 414         char *capname = capencode(talloc_tos(), name);
 415
 416         if (!cappath || !capname) {
 417                 errno = ENOMEM;
 418                 return -1;
 419         }
 420         return SMB_VFS_NEXT_LREMOVEXATTR(handle, cappath, capname);
 421 }
 422
 423 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
 424 {
 425         char *cappath = capencode(talloc_tos(), path);
 426
 427         if (!cappath) {
 428                 errno = ENOMEM;
 429                 return -1;
 430         }
 431         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
 432 }
 433
 434 static int cap_setxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 435 {
 436         char *cappath = capencode(talloc_tos(), path);
 437         char *capname = capencode(talloc_tos(), name);
 438
 439         if (!cappath || !capname) {
 440                 errno = ENOMEM;
 441                 return -1;
 442         }
 443         return SMB_VFS_NEXT_SETXATTR(handle, cappath, capname, value, size, flags);
 444 }
 445
 446 static int cap_lsetxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 447 {
 448         char *cappath = capencode(talloc_tos(), path);
 449         char *capname = capencode(talloc_tos(), name);
 450
 451         if (!cappath || !capname) {
 452                 errno = ENOMEM;
 453                 return -1;
 454         }
 455         return SMB_VFS_NEXT_LSETXATTR(handle, cappath, capname, value, size, flags);
 456 }
 457
 458 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
 459 {
 460         char *cappath = capencode(talloc_tos(), path);
 461
 462         if (!cappath) {
 463                 errno = ENOMEM;
 464                 return -1;
 465         }
 466         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
 467 }
 468
 469 /* VFS operations structure */
 470
 471 static vfs_op_tuple cap_op_tuples[] = {
 472
 473         /* Disk operations */
 474
 475         {SMB_VFS_OP(cap_disk_free),                     SMB_VFS_OP_DISK_FREE,           SMB_VFS_LAYER_TRANSPARENT},
 476
 477         /* Directory operations */
 478
 479         {SMB_VFS_OP(cap_opendir),                       SMB_VFS_OP_OPENDIR,             SMB_VFS_LAYER_TRANSPARENT},
 480         {SMB_VFS_OP(cap_readdir),                       SMB_VFS_OP_READDIR,             SMB_VFS_LAYER_TRANSPARENT},
 481         {SMB_VFS_OP(cap_mkdir),                 SMB_VFS_OP_MKDIR,               SMB_VFS_LAYER_TRANSPARENT},
 482         {SMB_VFS_OP(cap_rmdir),                 SMB_VFS_OP_RMDIR,               SMB_VFS_LAYER_TRANSPARENT},
 483
 484         /* File operations */
 485
 486         {SMB_VFS_OP(cap_open),                          SMB_VFS_OP_OPEN,                SMB_VFS_LAYER_TRANSPARENT},
 487         {SMB_VFS_OP(cap_rename),                        SMB_VFS_OP_RENAME,              SMB_VFS_LAYER_TRANSPARENT},
 488         {SMB_VFS_OP(cap_stat),                          SMB_VFS_OP_STAT,                SMB_VFS_LAYER_TRANSPARENT},
 489         {SMB_VFS_OP(cap_lstat),                 SMB_VFS_OP_LSTAT,               SMB_VFS_LAYER_TRANSPARENT},
 490         {SMB_VFS_OP(cap_unlink),                        SMB_VFS_OP_UNLINK,              SMB_VFS_LAYER_TRANSPARENT},
 491         {SMB_VFS_OP(cap_chmod),                 SMB_VFS_OP_CHMOD,               SMB_VFS_LAYER_TRANSPARENT},
 492         {SMB_VFS_OP(cap_chown),                 SMB_VFS_OP_CHOWN,               SMB_VFS_LAYER_TRANSPARENT},
 493         {SMB_VFS_OP(cap_lchown),                SMB_VFS_OP_LCHOWN,              SMB_VFS_LAYER_TRANSPARENT},
 494         {SMB_VFS_OP(cap_chdir),                 SMB_VFS_OP_CHDIR,               SMB_VFS_LAYER_TRANSPARENT},
 495         {SMB_VFS_OP(cap_ntimes),                        SMB_VFS_OP_NTIMES,              SMB_VFS_LAYER_TRANSPARENT},
 496         {SMB_VFS_OP(cap_symlink),                       SMB_VFS_OP_SYMLINK,             SMB_VFS_LAYER_TRANSPARENT},
 497         {SMB_VFS_OP(cap_readlink),                      SMB_VFS_OP_READLINK,            SMB_VFS_LAYER_TRANSPARENT},
 498         {SMB_VFS_OP(cap_link),                          SMB_VFS_OP_LINK,                SMB_VFS_LAYER_TRANSPARENT},
 499         {SMB_VFS_OP(cap_mknod),                 SMB_VFS_OP_MKNOD,               SMB_VFS_LAYER_TRANSPARENT},
 500         {SMB_VFS_OP(cap_realpath),                      SMB_VFS_OP_REALPATH,            SMB_VFS_LAYER_TRANSPARENT},
 501
 502         /* NT File ACL operations */
 503
 504         {SMB_VFS_OP(cap_set_nt_acl),                    SMB_VFS_OP_SET_NT_ACL,          SMB_VFS_LAYER_TRANSPARENT},
 505
 506         /* POSIX ACL operations */
 507
 508         {SMB_VFS_OP(cap_chmod_acl),                     SMB_VFS_OP_CHMOD_ACL,           SMB_VFS_LAYER_TRANSPARENT},
 509
 510         {SMB_VFS_OP(cap_sys_acl_get_file),              SMB_VFS_OP_SYS_ACL_GET_FILE,            SMB_VFS_LAYER_TRANSPARENT},
 511         {SMB_VFS_OP(cap_sys_acl_set_file),              SMB_VFS_OP_SYS_ACL_SET_FILE,            SMB_VFS_LAYER_TRANSPARENT},
 512         {SMB_VFS_OP(cap_sys_acl_delete_def_file),       SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,     SMB_VFS_LAYER_TRANSPARENT},
 513
 514         /* EA operations. */
 515         {SMB_VFS_OP(cap_getxattr),                      SMB_VFS_OP_GETXATTR,                    SMB_VFS_LAYER_TRANSPARENT},
 516         {SMB_VFS_OP(cap_lgetxattr),                     SMB_VFS_OP_LGETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 517         {SMB_VFS_OP(cap_fgetxattr),                     SMB_VFS_OP_FGETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 518         {SMB_VFS_OP(cap_listxattr),                     SMB_VFS_OP_LISTXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 519         {SMB_VFS_OP(cap_llistxattr),                    SMB_VFS_OP_LLISTXATTR,                  SMB_VFS_LAYER_TRANSPARENT},
 520         {SMB_VFS_OP(cap_removexattr),                   SMB_VFS_OP_REMOVEXATTR,                 SMB_VFS_LAYER_TRANSPARENT},
 521         {SMB_VFS_OP(cap_lremovexattr),                  SMB_VFS_OP_LREMOVEXATTR,                SMB_VFS_LAYER_TRANSPARENT},
 522         {SMB_VFS_OP(cap_fremovexattr),                  SMB_VFS_OP_FREMOVEXATTR,                SMB_VFS_LAYER_TRANSPARENT},
 523         {SMB_VFS_OP(cap_setxattr),                      SMB_VFS_OP_SETXATTR,                    SMB_VFS_LAYER_TRANSPARENT},
 524         {SMB_VFS_OP(cap_lsetxattr),                     SMB_VFS_OP_LSETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 525         {SMB_VFS_OP(cap_fsetxattr),                     SMB_VFS_OP_FSETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 526
 527         {NULL,                                          SMB_VFS_OP_NOOP,                        SMB_VFS_LAYER_NOOP}
 528 };
 529
 530 NTSTATUS vfs_cap_init(void);
 531 NTSTATUS vfs_cap_init(void)
 532 {
 533         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap", cap_op_tuples);
 534 }
 535
 536 /* For CAP functions */
 537 #define hex_tag ':'
 538 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 539 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 540 #define is_hex(s)               ((s)[0] == hex_tag)
 541
 542 static unsigned char hex2bin_table[256] = {
 543 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 544 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 545 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 546 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 547 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 548 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 549 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 550 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 551 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 552 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 553 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 554 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 555 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 556 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 557 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 558 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 559 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 560 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 561 };
 562 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 563
 564 /*******************************************************************
 565   original code -> ":xx"  - CAP format
 566 ********************************************************************/
 567
 568 static char *capencode(TALLOC_CTX *ctx, const char *from)
 569 {
 570         char *out = NULL;
 571         const char *p1;
 572         char *to = NULL;
 573         size_t len = 0;
 574
 575         for (p1 = from; *p1; p1++) {
 576                 if ((unsigned char)*p1 >= 0x80) {
 577                         len += 3;
 578                 } else {
 579                         len++;
 580                 }
 581         }
 582         len++;
 583
 584         to = TALLOC_ARRAY(ctx, char, len);
 585         if (!to) {
 586                 return NULL;
 587         }
 588
 589         for (out = to; *from;) {
 590                 /* buffer husoku error */
 591                 if ((unsigned char)*from >= 0x80) {
 592                         *out++ = hex_tag;
 593                         *out++ = bin2hex (((*from)>>4)&0x0f);
 594                         *out++ = bin2hex ((*from)&0x0f);
 595                         from++;
 596                 } else {
 597                         *out++ = *from++;
 598                 }
 599         }
 600         *out = '\0';
 601         return to;
 602 }
 603
 604 /*******************************************************************
 605   CAP -> original code
 606 ********************************************************************/
 607 /* ":xx" -> a byte */
 608
 609 static char *capdecode(TALLOC_CTX *ctx, const char *from)
 610 {
 611         const char *p1;
 612         char *out = NULL;
 613         char *to = NULL;
 614         size_t len = 0;
 615
 616         for (p1 = from; *p1; len++) {
 617                 if (is_hex(from)) {
 618                         p1 += 3;
 619                 } else {
 620                         p1++;
 621                 }
 622         }
 623
 624         to = TALLOC_ARRAY(ctx, char, len);
 625         if (!to) {
 626                 return NULL;
 627         }
 628
 629         for (out = to; *from;) {
 630                 if (is_hex(from)) {
 631                         *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
 632                         from += 3;
 633                 } else {
 634                         *out++ = *from++;
 635                 }
 636         }
 637         *out = '\0';
 638         return to;
 639 }