git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| bcb02034 SF |
1 | /* |
| 2 | * fs/cifs/cifsacl.c | |
| 3 | * | |
| 4 | * Copyright (C) International Business Machines Corp., 2007 | |
| 5 | * Author(s): Steve French (sfrench@us.ibm.com) | |
| 6 | * | |
| 7 | * Contains the routines for mapping CIFS/NTFS ACLs | |
| 8 | * | |
| 9 | * This library is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU Lesser General Public License as published | |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
| 12 | * (at your option) any later version. | |
| 13 | * | |
| 14 | * This library 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 | |
| 17 | * the GNU Lesser General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public License | |
| 20 | * along with this library; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 22 | */ | |
| 23 | ||
| 24 | /* security id for everyone */ | |
| 25 | static const struct cifs_sid sid_everyone = | |
| 26 | {1, 1, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}}; | |
| 27 | /* group users */ | |
| 28 | static const struct cifs_sid sid_user = | |
| 29 | {1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}}; | |
| 30 | ||
| 31 | static int parse_sid(struct cifs_sid *psid, char *end_of_acl) | |
| 32 | { | |
| 33 | /* BB need to add parm so we can store the SID BB */ | |
| 34 | ||
| 35 | /* validate that we do not go past end of acl */ | |
| 36 | if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) { | |
| 37 | cERROR(1, ("ACL to small to parse SID")); | |
| 38 | return -EINVAL; | |
| 39 | } | |
| 40 | #ifdef CONFIG_CIFS_DEBUG2 | |
| 41 | cFYI(1, ("revision %d num_auth %d First subauth 0x%x", | |
| 42 | psid->revision, psid->num_auth, psid->sub_auth[0])); | |
| 43 | ||
| 44 | /* BB add length check to make sure that we do not have huge num auths | |
| 45 | and therefore go off the end */ | |
| 46 | cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_auth]))); | |
| 47 | #endif | |
| 48 | return 0; | |
| 49 | } | |
| 50 | ||
| 51 | /* Convert CIFS ACL to POSIX form */ | |
| 52 | int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len) | |
| 53 | { | |
| 54 | int i; | |
| 55 | int num_aces = 0; | |
| 56 | int acl_size; | |
| 57 | struct cifs_sid *owner_sid_ptr, *group_sid_ptr; | |
| 58 | struct cifs_acl *dacl_ptr; /* no need for SACL ptr */ | |
| 59 | struct cifs_ntace **ppntace; | |
| 60 | struct cifs_ace **ppace; | |
| 61 | char *acl_base; | |
| 62 | char *end_of_acl = ((char *)pntsd) + acl_len; | |
| 63 | ||
| 64 | owner_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
| 65 | cpu_to_le32(pntsd->osidoffset)); | |
| 66 | group_sid_ptr = (struct cifs_sid *)((char *)pntsd + | |
| 67 | cpu_to_le32(pntsd->gsidoffset)); | |
| 68 | dacl_ptr = (struct cifs_acl *)((char *)pntsd + | |
| 69 | cpu_to_le32(pntsd->dacloffset)); | |
| 70 | #ifdef CONFIG_CIFS_DEBUG2 | |
| 71 | cFYI(1, ("revision %d type 0x%x ooffset 0x%x goffset 0x%x " | |
| 72 | "sacloffset 0x%x dacloffset 0x%x", | |
| 73 | pntsd->revision, pntsd->type, | |
| 74 | pntsd->osidoffset, pntsd->gsidoffset, pntsd->sacloffset, | |
| 75 | pntsd->dacloffset)); | |
| 76 | #endif | |
| 77 | rc = parse_sid(owner_sid_ptr, end_of_acl); | |
| 78 | if (rc) | |
| 79 | return rc; | |
| 80 | ||
| 81 | rc = parse_sid(group_sid_ptr, end_of_acl); | |
| 82 | if (rc) | |
| 83 | return rc; | |
| 84 | ||
| 85 | /* cifscred->uid = owner_sid_ptr->rid; | |
| 86 | cifscred->gid = group_sid_ptr->rid; | |
| 87 | memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr, | |
| 88 | sizeof (struct cifs_sid)); | |
| 89 | memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr, | |
| 90 | sizeof (struct cifs_sid)); */ | |
| 91 | ||
| 92 | num_aces = cpu_to_le32(dacl_ptr->num_aces); | |
| 93 | cFYI(1, ("num aces %d", num_aces)); | |
| 94 | if (num_aces > 0) { | |
| 95 | ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *), | |
| 96 | GFP_KERNEL); | |
| 97 | ppace = kmalloc(num_aces * sizeof(struct cifs_ace *), | |
| 98 | GFP_KERNEL); | |
| 99 | ||
| 100 | /* cifscred->cecount = dacl_ptr->num_aces; | |
| 101 | cifscred->ntaces = kmalloc(num_aces * | |
| 102 | sizeof(struct cifs_ntace *), GFP_KERNEL); | |
| 103 | cifscred->aces = kmalloc(num_aces * | |
| 104 | sizeof(struct cifs_ace *), GFP_KERNEL);*/ | |
| 105 | ||
| 106 | acl_base = (char *)dacl_ptr; | |
| 107 | acl_size = sizeof(struct cifs_acl); | |
| 108 | ||
| 109 | for (i = 0; i < num_aces; ++i) { | |
| 110 | ppntace[i] = (struct cifs_ntace *) | |
| 111 | (acl_base + acl_size); | |
| 112 | ppace[i] = (struct cifs_ace *) | |
| 113 | ((char *)ppntace[i] + | |
| 114 | sizeof(struct cifs_ntace)); | |
| 115 | ||
| 116 | /* memcpy((void *)(&(cifscred->ntaces[i])), | |
| 117 | (void *)ntace_ptrptr[i], | |
| 118 | sizeof(struct cifs_ntace)); | |
| 119 | memcpy((void *)(&(cifscred->aces[i])), | |
| 120 | (void *)ace_ptrptr[i], | |
| 121 | sizeof(struct cifs_ace)); */ | |
| 122 | ||
| 123 | acl_base = (char *)ppntace[i]; | |
| 124 | acl_size = cpu_to_le32(ppntace[i]->size); | |
| 125 | #ifdef CONFIG_CIFS_DEBUG2 | |
| 126 | cFYI(1, ("ACE revision:%d", ppace[i]->revision)); | |
| 127 | #endif | |
| 128 | } | |
| 129 | kfree(ppace); | |
| 130 | kfree(ppntace); | |
| 131 | } | |
| 132 | ||
| 133 | return (0); | |
| 134 | } |