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  * 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 #include "smbd/smbd.h"
  27
  28 /* cap functions */
  29 static char *capencode(TALLOC_CTX *ctx, const char *from);
  30 static char *capdecode(TALLOC_CTX *ctx, const char *from);
  31
  32 static uint64_t cap_disk_free(vfs_handle_struct *handle, const char *path,
  33                               uint64_t *bsize, uint64_t *dfree, uint64_t *dsize)
  34 {
  35         char *cappath = capencode(talloc_tos(), path);
  36
  37         if (!cappath) {
  38                 errno = ENOMEM;
  39                 return (uint64_t)-1;
  40         }
  41         return SMB_VFS_NEXT_DISK_FREE(handle, cappath, bsize, dfree, dsize);
  42 }
  43
  44 static DIR *cap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32_t attr)
  45 {
  46         char *capname = capencode(talloc_tos(), fname);
  47
  48         if (!capname) {
  49                 errno = ENOMEM;
  50                 return NULL;
  51         }
  52         return SMB_VFS_NEXT_OPENDIR(handle, capname, mask, attr);
  53 }
  54
  55 static struct dirent *cap_readdir(vfs_handle_struct *handle,
  56                                       DIR *dirp,
  57                                       SMB_STRUCT_STAT *sbuf)
  58 {
  59         struct dirent *result;
  60         struct dirent *newdirent;
  61         char *newname;
  62         size_t newnamelen;
  63         DEBUG(3,("cap: cap_readdir\n"));
  64
  65         result = SMB_VFS_NEXT_READDIR(handle, dirp, NULL);
  66         if (!result) {
  67                 return NULL;
  68         }
  69
  70         newname = capdecode(talloc_tos(), result->d_name);
  71         if (!newname) {
  72                 return NULL;
  73         }
  74         DEBUG(3,("cap: cap_readdir: %s\n", newname));
  75         newnamelen = strlen(newname)+1;
  76         newdirent = (struct dirent *)talloc_array(talloc_tos(),
  77                         char,
  78                         sizeof(struct dirent)+
  79                                 newnamelen);
  80         if (!newdirent) {
  81                 return NULL;
  82         }
  83         memcpy(newdirent, result, sizeof(struct dirent));
  84         memcpy(&newdirent->d_name, newname, newnamelen);
  85         return newdirent;
  86 }
  87
  88 static int cap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
  89 {
  90         char *cappath = capencode(talloc_tos(), path);
  91
  92         if (!cappath) {
  93                 errno = ENOMEM;
  94                 return -1;
  95         }
  96         return SMB_VFS_NEXT_MKDIR(handle, cappath, mode);
  97 }
  98
  99 static int cap_rmdir(vfs_handle_struct *handle, const char *path)
 100 {
 101         char *cappath = capencode(talloc_tos(), path);
 102
 103         if (!cappath) {
 104                 errno = ENOMEM;
 105                 return -1;
 106         }
 107         return SMB_VFS_NEXT_RMDIR(handle, cappath);
 108 }
 109
 110 static int cap_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 111                     files_struct *fsp, int flags, mode_t mode)
 112 {
 113         char *cappath;
 114         char *tmp_base_name = NULL;
 115         int ret;
 116
 117         cappath = capencode(talloc_tos(), smb_fname->base_name);
 118
 119         if (!cappath) {
 120                 errno = ENOMEM;
 121                 return -1;
 122         }
 123
 124         tmp_base_name = smb_fname->base_name;
 125         smb_fname->base_name = cappath;
 126
 127         DEBUG(3,("cap: cap_open for %s\n", smb_fname_str_dbg(smb_fname)));
 128         ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 129
 130         smb_fname->base_name = tmp_base_name;
 131         TALLOC_FREE(cappath);
 132
 133         return ret;
 134 }
 135
 136 static int cap_rename(vfs_handle_struct *handle,
 137                       const struct smb_filename *smb_fname_src,
 138                       const struct smb_filename *smb_fname_dst)
 139 {
 140         char *capold = NULL;
 141         char *capnew = NULL;
 142         struct smb_filename *smb_fname_src_tmp = NULL;
 143         struct smb_filename *smb_fname_dst_tmp = NULL;
 144         int ret = -1;
 145
 146         capold = capencode(talloc_tos(), smb_fname_src->base_name);
 147         capnew = capencode(talloc_tos(), smb_fname_dst->base_name);
 148         if (!capold || !capnew) {
 149                 errno = ENOMEM;
 150                 goto out;
 151         }
 152
 153         /* Setup temporary smb_filename structs. */
 154         smb_fname_src_tmp = cp_smb_filename(talloc_tos(), smb_fname_src);
 155         if (smb_fname_src_tmp == NULL) {
 156                 errno = ENOMEM;
 157                 goto out;
 158         }
 159         smb_fname_dst_tmp = cp_smb_filename(talloc_tos(), smb_fname_dst);
 160         if (smb_fname_dst_tmp == NULL) {
 161                 errno = ENOMEM;
 162                 goto out;
 163         }
 164
 165         smb_fname_src_tmp->base_name = capold;
 166         smb_fname_dst_tmp->base_name = capnew;
 167
 168         ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src_tmp,
 169                                   smb_fname_dst_tmp);
 170  out:
 171         TALLOC_FREE(capold);
 172         TALLOC_FREE(capnew);
 173         TALLOC_FREE(smb_fname_src_tmp);
 174         TALLOC_FREE(smb_fname_dst_tmp);
 175
 176         return ret;
 177 }
 178
 179 static int cap_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 180 {
 181         char *cappath;
 182         char *tmp_base_name = NULL;
 183         int ret;
 184
 185         cappath = capencode(talloc_tos(), smb_fname->base_name);
 186
 187         if (!cappath) {
 188                 errno = ENOMEM;
 189                 return -1;
 190         }
 191
 192         tmp_base_name = smb_fname->base_name;
 193         smb_fname->base_name = cappath;
 194
 195         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
 196
 197         smb_fname->base_name = tmp_base_name;
 198         TALLOC_FREE(cappath);
 199
 200         return ret;
 201 }
 202
 203 static int cap_lstat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 204 {
 205         char *cappath;
 206         char *tmp_base_name = NULL;
 207         int ret;
 208
 209         cappath = capencode(talloc_tos(), smb_fname->base_name);
 210
 211         if (!cappath) {
 212                 errno = ENOMEM;
 213                 return -1;
 214         }
 215
 216         tmp_base_name = smb_fname->base_name;
 217         smb_fname->base_name = cappath;
 218
 219         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 220
 221         smb_fname->base_name = tmp_base_name;
 222         TALLOC_FREE(cappath);
 223
 224         return ret;
 225 }
 226
 227 static int cap_unlink(vfs_handle_struct *handle,
 228                       const struct smb_filename *smb_fname)
 229 {
 230         struct smb_filename *smb_fname_tmp = NULL;
 231         char *cappath = NULL;
 232         int ret;
 233
 234         cappath = capencode(talloc_tos(), smb_fname->base_name);
 235         if (!cappath) {
 236                 errno = ENOMEM;
 237                 return -1;
 238         }
 239
 240         /* Setup temporary smb_filename structs. */
 241         smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
 242         if (smb_fname_tmp == NULL) {
 243                 errno = ENOMEM;
 244                 return -1;
 245         }
 246
 247         smb_fname_tmp->base_name = cappath;
 248
 249         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 250
 251         TALLOC_FREE(smb_fname_tmp);
 252         return ret;
 253 }
 254
 255 static int cap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 256 {
 257         char *cappath = capencode(talloc_tos(), path);
 258
 259         if (!cappath) {
 260                 errno = ENOMEM;
 261                 return -1;
 262         }
 263         return SMB_VFS_NEXT_CHMOD(handle, cappath, mode);
 264 }
 265
 266 static int cap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 267 {
 268         char *cappath = capencode(talloc_tos(), path);
 269
 270         if (!cappath) {
 271                 errno = ENOMEM;
 272                 return -1;
 273         }
 274         return SMB_VFS_NEXT_CHOWN(handle, cappath, uid, gid);
 275 }
 276
 277 static int cap_lchown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 278 {
 279         char *cappath = capencode(talloc_tos(), path);
 280
 281         if (!cappath) {
 282                 errno = ENOMEM;
 283                 return -1;
 284         }
 285         return SMB_VFS_NEXT_LCHOWN(handle, cappath, uid, gid);
 286 }
 287
 288 static int cap_chdir(vfs_handle_struct *handle, const char *path)
 289 {
 290         char *cappath = capencode(talloc_tos(), path);
 291
 292         if (!cappath) {
 293                 errno = ENOMEM;
 294                 return -1;
 295         }
 296         DEBUG(3,("cap: cap_chdir for %s\n", path));
 297         return SMB_VFS_NEXT_CHDIR(handle, cappath);
 298 }
 299
 300 static int cap_ntimes(vfs_handle_struct *handle,
 301                       const struct smb_filename *smb_fname,
 302                       struct smb_file_time *ft)
 303 {
 304         struct smb_filename *smb_fname_tmp = NULL;
 305         char *cappath = NULL;
 306         int ret;
 307
 308         cappath = capencode(talloc_tos(), smb_fname->base_name);
 309
 310         if (!cappath) {
 311                 errno = ENOMEM;
 312                 return -1;
 313         }
 314
 315         /* Setup temporary smb_filename structs. */
 316         smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
 317         if (smb_fname_tmp == NULL) {
 318                 errno = ENOMEM;
 319                 return -1;
 320         }
 321
 322         smb_fname_tmp->base_name = cappath;
 323
 324         ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, ft);
 325
 326         TALLOC_FREE(smb_fname_tmp);
 327         return ret;
 328 }
 329
 330
 331 static int cap_symlink(vfs_handle_struct *handle, const char *oldpath,
 332                        const char *newpath)
 333 {
 334         char *capold = capencode(talloc_tos(), oldpath);
 335         char *capnew = capencode(talloc_tos(), newpath);
 336
 337         if (!capold || !capnew) {
 338                 errno = ENOMEM;
 339                 return -1;
 340         }
 341         return SMB_VFS_NEXT_SYMLINK(handle, capold, capnew);
 342 }
 343
 344 static int cap_readlink(vfs_handle_struct *handle, const char *path,
 345                         char *buf, size_t bufsiz)
 346 {
 347         char *cappath = capencode(talloc_tos(), path);
 348
 349         if (!cappath) {
 350                 errno = ENOMEM;
 351                 return -1;
 352         }
 353         return SMB_VFS_NEXT_READLINK(handle, cappath, buf, bufsiz);
 354 }
 355
 356 static int cap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 357 {
 358         char *capold = capencode(talloc_tos(), oldpath);
 359         char *capnew = capencode(talloc_tos(), newpath);
 360
 361         if (!capold || !capnew) {
 362                 errno = ENOMEM;
 363                 return -1;
 364         }
 365         return SMB_VFS_NEXT_LINK(handle, capold, capnew);
 366 }
 367
 368 static int cap_mknod(vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev)
 369 {
 370         char *cappath = capencode(talloc_tos(), path);
 371
 372         if (!cappath) {
 373                 errno = ENOMEM;
 374                 return -1;
 375         }
 376         return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
 377 }
 378
 379 static char *cap_realpath(vfs_handle_struct *handle, const char *path)
 380 {
 381         /* monyo need capencode'ed and capdecode'ed? */
 382         char *cappath = capencode(talloc_tos(), path);
 383
 384         if (!cappath) {
 385                 errno = ENOMEM;
 386                 return NULL;
 387         }
 388         return SMB_VFS_NEXT_REALPATH(handle, cappath);
 389 }
 390
 391 static int cap_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 392 {
 393         char *cappath = capencode(talloc_tos(), path);
 394
 395         /* If the underlying VFS doesn't have ACL support... */
 396         if (!cappath) {
 397                 errno = ENOMEM;
 398                 return -1;
 399         }
 400         return SMB_VFS_NEXT_CHMOD_ACL(handle, cappath, mode);
 401 }
 402
 403 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle,
 404                                       const char *path, SMB_ACL_TYPE_T type,
 405                                       TALLOC_CTX *mem_ctx)
 406 {
 407         char *cappath = capencode(talloc_tos(), path);
 408
 409         if (!cappath) {
 410                 errno = ENOMEM;
 411                 return (SMB_ACL_T)NULL;
 412         }
 413         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cappath, type, mem_ctx);
 414 }
 415
 416 static int cap_sys_acl_set_file(vfs_handle_struct *handle, const char *path, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 417 {
 418         char *cappath = capencode(talloc_tos(), path);
 419
 420         if (!cappath) {
 421                 errno = ENOMEM;
 422                 return -1;
 423         }
 424         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, cappath, acltype, theacl);
 425 }
 426
 427 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
 428 {
 429         char *cappath = capencode(talloc_tos(), path);
 430
 431         if (!cappath) {
 432                 errno = ENOMEM;
 433                 return -1;
 434         }
 435         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cappath);
 436 }
 437
 438 static ssize_t cap_getxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t size)
 439 {
 440         char *cappath = capencode(talloc_tos(), path);
 441         char *capname = capencode(talloc_tos(), name);
 442
 443         if (!cappath || !capname) {
 444                 errno = ENOMEM;
 445                 return -1;
 446         }
 447         return SMB_VFS_NEXT_GETXATTR(handle, cappath, capname, value, size);
 448 }
 449
 450 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
 451 {
 452         char *cappath = capencode(talloc_tos(), path);
 453
 454         if (!cappath) {
 455                 errno = ENOMEM;
 456                 return -1;
 457         }
 458         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
 459 }
 460
 461 static ssize_t cap_listxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 462 {
 463         char *cappath = capencode(talloc_tos(), path);
 464
 465         if (!cappath) {
 466                 errno = ENOMEM;
 467                 return -1;
 468         }
 469         return SMB_VFS_NEXT_LISTXATTR(handle, cappath, list, size);
 470 }
 471
 472 static int cap_removexattr(vfs_handle_struct *handle, const char *path, const char *name)
 473 {
 474         char *cappath = capencode(talloc_tos(), path);
 475         char *capname = capencode(talloc_tos(), name);
 476
 477         if (!cappath || !capname) {
 478                 errno = ENOMEM;
 479                 return -1;
 480         }
 481         return SMB_VFS_NEXT_REMOVEXATTR(handle, cappath, capname);
 482 }
 483
 484 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
 485 {
 486         char *cappath = capencode(talloc_tos(), path);
 487
 488         if (!cappath) {
 489                 errno = ENOMEM;
 490                 return -1;
 491         }
 492         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
 493 }
 494
 495 static int cap_setxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 496 {
 497         char *cappath = capencode(talloc_tos(), path);
 498         char *capname = capencode(talloc_tos(), name);
 499
 500         if (!cappath || !capname) {
 501                 errno = ENOMEM;
 502                 return -1;
 503         }
 504         return SMB_VFS_NEXT_SETXATTR(handle, cappath, capname, value, size, flags);
 505 }
 506
 507 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
 508 {
 509         char *cappath = capencode(talloc_tos(), path);
 510
 511         if (!cappath) {
 512                 errno = ENOMEM;
 513                 return -1;
 514         }
 515         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
 516 }
 517
 518 static struct vfs_fn_pointers vfs_cap_fns = {
 519         .disk_free_fn = cap_disk_free,
 520         .opendir_fn = cap_opendir,
 521         .readdir_fn = cap_readdir,
 522         .mkdir_fn = cap_mkdir,
 523         .rmdir_fn = cap_rmdir,
 524         .open_fn = cap_open,
 525         .rename_fn = cap_rename,
 526         .stat_fn = cap_stat,
 527         .lstat_fn = cap_lstat,
 528         .unlink_fn = cap_unlink,
 529         .chmod_fn = cap_chmod,
 530         .chown_fn = cap_chown,
 531         .lchown_fn = cap_lchown,
 532         .chdir_fn = cap_chdir,
 533         .ntimes_fn = cap_ntimes,
 534         .symlink_fn = cap_symlink,
 535         .readlink_fn = cap_readlink,
 536         .link_fn = cap_link,
 537         .mknod_fn = cap_mknod,
 538         .realpath_fn = cap_realpath,
 539         .chmod_acl_fn = cap_chmod_acl,
 540         .sys_acl_get_file_fn = cap_sys_acl_get_file,
 541         .sys_acl_set_file_fn = cap_sys_acl_set_file,
 542         .sys_acl_delete_def_file_fn = cap_sys_acl_delete_def_file,
 543         .getxattr_fn = cap_getxattr,
 544         .fgetxattr_fn = cap_fgetxattr,
 545         .listxattr_fn = cap_listxattr,
 546         .removexattr_fn = cap_removexattr,
 547         .fremovexattr_fn = cap_fremovexattr,
 548         .setxattr_fn = cap_setxattr,
 549         .fsetxattr_fn = cap_fsetxattr
 550 };
 551
 552 NTSTATUS vfs_cap_init(void);
 553 NTSTATUS vfs_cap_init(void)
 554 {
 555         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap",
 556                                 &vfs_cap_fns);
 557 }
 558
 559 /* For CAP functions */
 560 #define hex_tag ':'
 561 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 562 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 563 #define is_hex(s)               ((s)[0] == hex_tag)
 564
 565 static unsigned char hex2bin_table[256] = {
 566 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 567 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 568 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 569 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 570 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 571 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 572 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 573 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 574 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 575 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 576 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 577 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 578 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 579 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 580 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 581 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 582 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 583 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 584 };
 585 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 586
 587 /*******************************************************************
 588   original code -> ":xx"  - CAP format
 589 ********************************************************************/
 590
 591 static char *capencode(TALLOC_CTX *ctx, const char *from)
 592 {
 593         char *out = NULL;
 594         const char *p1;
 595         char *to = NULL;
 596         size_t len = 0;
 597
 598         for (p1 = from; *p1; p1++) {
 599                 if ((unsigned char)*p1 >= 0x80) {
 600                         len += 3;
 601                 } else {
 602                         len++;
 603                 }
 604         }
 605         len++;
 606
 607         to = talloc_array(ctx, char, len);
 608         if (!to) {
 609                 return NULL;
 610         }
 611
 612         for (out = to; *from;) {
 613                 /* buffer husoku error */
 614                 if ((unsigned char)*from >= 0x80) {
 615                         *out++ = hex_tag;
 616                         *out++ = bin2hex (((*from)>>4)&0x0f);
 617                         *out++ = bin2hex ((*from)&0x0f);
 618                         from++;
 619                 } else {
 620                         *out++ = *from++;
 621                 }
 622         }
 623         *out = '\0';
 624         return to;
 625 }
 626
 627 /*******************************************************************
 628   CAP -> original code
 629 ********************************************************************/
 630 /* ":xx" -> a byte */
 631
 632 static char *capdecode(TALLOC_CTX *ctx, const char *from)
 633 {
 634         const char *p1;
 635         char *out = NULL;
 636         char *to = NULL;
 637         size_t len = 0;
 638
 639         for (p1 = from; *p1; len++) {
 640                 if (is_hex(p1)) {
 641                         p1 += 3;
 642                 } else {
 643                         p1++;
 644                 }
 645         }
 646         len++;
 647
 648         to = talloc_array(ctx, char, len);
 649         if (!to) {
 650                 return NULL;
 651         }
 652
 653         for (out = to; *from;) {
 654                 if (is_hex(from)) {
 655                         *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
 656                         from += 3;
 657                 } else {
 658                         *out++ = *from++;
 659                 }
 660         }
 661         *out = '\0';
 662         return to;
 663 }