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201 lines
6.6 KiB
C
201 lines
6.6 KiB
C
/*
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*
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* Copyright (c) 2007-2008 Jean-Pierre Andre
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*
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the NTFS-3G
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* distribution in the file COPYING); if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef ACLS_H
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#define ACLS_H
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/*
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* JPA configuration modes for security.c / acls.c
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* should be moved to some config file
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*/
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#define BUFSZ 1024 /* buffer size to read mapping file */
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#define MAPPINGFILE ".NTFS-3G/UserMapping" /* default mapping file */
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#define LINESZ 120 /* maximum useful size of a mapping line */
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#define CACHE_PERMISSIONS_BITS 6 /* log2 of unitary allocation of permissions */
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#define CACHE_PERMISSIONS_SIZE 262144 /* max cacheable permissions */
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/*
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* JPA The following must be in some library...
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* but did not found out where
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*/
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#define endian_rev16(x) (((x >> 8) & 255) | ((x & 255) << 8))
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#define endian_rev32(x) (((x >> 24) & 255) | ((x >> 8) & 0xff00) \
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| ((x & 0xff00) << 8) | ((x & 255) << 24))
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#define cpu_to_be16(x) endian_rev16(cpu_to_le16(x))
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#define cpu_to_be32(x) endian_rev32(cpu_to_le32(x))
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/*
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* Macro definitions needed to share code with secaudit
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*/
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#define NTFS_FIND_USID(map,uid,buf) ntfs_find_usid(map,uid,buf)
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#define NTFS_FIND_GSID(map,gid,buf) ntfs_find_gsid(map,gid,buf)
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#define NTFS_FIND_USER(map,usid) ntfs_find_user(map,usid)
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#define NTFS_FIND_GROUP(map,gsid) ntfs_find_group(map,gsid)
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/*
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* Matching of ntfs permissions to Linux permissions
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* these constants are adapted to endianness
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* when setting, set them all
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* when checking, check one is present
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*/
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/* flags which are set to mean exec, write or read */
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#define FILE_READ (FILE_READ_DATA)
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#define FILE_WRITE (FILE_WRITE_DATA | FILE_APPEND_DATA \
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| READ_CONTROL | FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA)
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#define FILE_EXEC (FILE_EXECUTE)
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#define DIR_READ FILE_LIST_DIRECTORY
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#define DIR_WRITE (FILE_ADD_FILE | FILE_ADD_SUBDIRECTORY | FILE_DELETE_CHILD \
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| READ_CONTROL | FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA)
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#define DIR_EXEC (FILE_TRAVERSE)
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/* flags tested for meaning exec, write or read */
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/* tests for write allow for interpretation of a sticky bit */
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#define FILE_GREAD (FILE_READ_DATA | GENERIC_READ)
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#define FILE_GWRITE (FILE_WRITE_DATA | FILE_APPEND_DATA | GENERIC_WRITE)
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#define FILE_GEXEC (FILE_EXECUTE | GENERIC_EXECUTE)
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#define DIR_GREAD (FILE_LIST_DIRECTORY | GENERIC_READ)
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#define DIR_GWRITE (FILE_ADD_FILE | FILE_ADD_SUBDIRECTORY | GENERIC_WRITE)
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#define DIR_GEXEC (FILE_TRAVERSE | GENERIC_EXECUTE)
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/* standard owner (and administrator) rights */
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#define OWNER_RIGHTS (DELETE | READ_CONTROL | WRITE_DAC | WRITE_OWNER \
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| SYNCHRONIZE \
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| FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES \
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| FILE_READ_EA | FILE_WRITE_EA)
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/* standard world rights */
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#define WORLD_RIGHTS (READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_READ_EA \
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| SYNCHRONIZE)
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/* inheritance flags for files and directories */
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#define FILE_INHERITANCE NO_PROPAGATE_INHERIT_ACE
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#define DIR_INHERITANCE (OBJECT_INHERIT_ACE | CONTAINER_INHERIT_ACE)
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/*
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* To identify NTFS ACL meaning Posix ACL granted to root
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* we use rights always granted to anybody, so they have no impact
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* either on Windows or on Linux.
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*/
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#define ROOT_OWNER_UNMARK SYNCHRONIZE /* ACL granted to root as owner */
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#define ROOT_GROUP_UNMARK FILE_READ_EA /* ACL granted to root as group */
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/*
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* A type large enough to hold any SID
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*/
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typedef char BIGSID[40];
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/*
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* Struct to hold the input mapping file
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* (private to this module)
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*/
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struct MAPLIST {
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struct MAPLIST *next;
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char *uidstr; /* uid text from the same record */
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char *gidstr; /* gid text from the same record */
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char *sidstr; /* sid text from the same record */
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char maptext[LINESZ + 1];
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};
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typedef int (*FILEREADER)(void *fileid, char *buf, size_t size, off_t pos);
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/*
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* Constants defined in acls.c
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*/
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extern const SID *adminsid;
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extern const SID *worldsid;
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/*
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* Functions defined in acls.c
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*/
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BOOL ntfs_valid_descr(const char *securattr, unsigned int attrsz);
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BOOL ntfs_valid_pattern(const SID *sid);
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BOOL ntfs_valid_sid(const SID *sid);
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BOOL ntfs_same_sid(const SID *first, const SID *second);
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BOOL ntfs_is_user_sid(const SID *usid);
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int ntfs_sid_size(const SID * sid);
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unsigned int ntfs_attr_size(const char *attr);
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const SID *ntfs_find_usid(const struct MAPPING *usermapping,
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uid_t uid, SID *pdefsid);
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const SID *ntfs_find_gsid(const struct MAPPING *groupmapping,
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gid_t gid, SID *pdefsid);
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uid_t ntfs_find_user(const struct MAPPING *usermapping, const SID *usid);
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gid_t ntfs_find_group(const struct MAPPING *groupmapping, const SID * gsid);
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const SID *ntfs_acl_owner(const char *secattr);
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#if POSIXACLS
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BOOL ntfs_valid_posix(const struct POSIX_SECURITY *pxdesc);
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void ntfs_sort_posix(struct POSIX_SECURITY *pxdesc);
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int ntfs_merge_mode_posix(struct POSIX_SECURITY *pxdesc, mode_t mode);
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struct POSIX_SECURITY *ntfs_build_inherited_posix(
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const struct POSIX_SECURITY *pxdesc, mode_t mode,
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mode_t umask, BOOL isdir);
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struct POSIX_SECURITY *ntfs_replace_acl(const struct POSIX_SECURITY *oldpxdesc,
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const struct POSIX_ACL *newacl, int count, BOOL deflt);
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struct POSIX_SECURITY *ntfs_build_permissions_posix(
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struct MAPPING* const mapping[],
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const char *securattr,
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const SID *usid, const SID *gsid, BOOL isdir);
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struct POSIX_SECURITY *ntfs_merge_descr_posix(const struct POSIX_SECURITY *first,
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const struct POSIX_SECURITY *second);
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char *ntfs_build_descr_posix(struct MAPPING* const mapping[],
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struct POSIX_SECURITY *pxdesc,
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int isdir, const SID *usid, const SID *gsid);
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#endif /* POSIXACLS */
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int ntfs_inherit_acl(const ACL *oldacl, ACL *newacl,
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const SID *usid, const SID *gsid,
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BOOL fordir, le16 inherited);
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int ntfs_build_permissions(const char *securattr,
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const SID *usid, const SID *gsid, BOOL isdir);
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char *ntfs_build_descr(mode_t mode,
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int isdir, const SID * usid, const SID * gsid);
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struct MAPLIST *ntfs_read_mapping(FILEREADER reader, void *fileid);
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struct MAPPING *ntfs_do_user_mapping(struct MAPLIST *firstitem);
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struct MAPPING *ntfs_do_group_mapping(struct MAPLIST *firstitem);
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void ntfs_free_mapping(struct MAPPING *mapping[]);
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#endif /* ACLS_H */
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