#include <linux/fs.h>
#include "cifspdu.h"
#include "cifsglob.h"
+#include "cifsacl.h"
#include "cifsproto.h"
#include "cifs_debug.h"
-#include "cifsacl.h"
+
+
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+
+static struct cifs_wksid wksidarr[NUM_WK_SIDS] = {
+ {{1, 0, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0} }, "null user"},
+ {{1, 1, {0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0} }, "nobody"},
+ {{1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(11), 0, 0, 0, 0} }, "net-users"},
+ {{1, 1, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(18), 0, 0, 0, 0} }, "sys"},
+ {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(544), 0, 0, 0} }, "root"},
+ {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(545), 0, 0, 0} }, "users"},
+ {{1, 2, {0, 0, 0, 0, 0, 5}, {cpu_to_le32(32), cpu_to_le32(546), 0, 0, 0} }, "guest"}
+};
+
/* security id for everyone */
static const struct cifs_sid sid_everyone =
- {1, 1, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}};
+ {1, 1, {0, 0, 0, 0, 0, 0}, {} };
/* group users */
static const struct cifs_sid sid_user =
- {1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}};
+ {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
+
+
+int match_sid(struct cifs_sid *ctsid)
+{
+ int i, j;
+ int num_subauth, num_sat, num_saw;
+ struct cifs_sid *cwsid;
+
+ if (!ctsid)
+ return (-1);
+
+ for (i = 0; i < NUM_WK_SIDS; ++i) {
+ cwsid = &(wksidarr[i].cifssid);
+
+ /* compare the revision */
+ if (ctsid->revision != cwsid->revision)
+ continue;
+
+ /* compare all of the six auth values */
+ for (j = 0; j < 6; ++j) {
+ if (ctsid->authority[j] != cwsid->authority[j])
+ break;
+ }
+ if (j < 6)
+ continue; /* all of the auth values did not match */
+
+ /* compare all of the subauth values if any */
+ num_sat = ctsid->num_subauth;
+ num_saw = cwsid->num_subauth;
+ num_subauth = num_sat < num_saw ? num_sat : num_saw;
+ if (num_subauth) {
+ for (j = 0; j < num_subauth; ++j) {
+ if (ctsid->sub_auth[j] != cwsid->sub_auth[j])
+ break;
+ }
+ if (j < num_subauth)
+ continue; /* all sub_auth values do not match */
+ }
+
+ cFYI(1, ("matching sid: %s\n", wksidarr[i].sidname));
+ return (0); /* sids compare/match */
+ }
+
+ cFYI(1, ("No matching sid"));
+ return (-1);
+}
+
+/* if the two SIDs (roughly equivalent to a UUID for a user or group) are
+ the same returns 1, if they do not match returns 0 */
+int compare_sids(struct cifs_sid *ctsid, struct cifs_sid *cwsid)
+{
+ int i;
+ int num_subauth, num_sat, num_saw;
+
+ if ((!ctsid) || (!cwsid))
+ return (0);
+
+ /* compare the revision */
+ if (ctsid->revision != cwsid->revision)
+ return (0);
+
+ /* compare all of the six auth values */
+ for (i = 0; i < 6; ++i) {
+ if (ctsid->authority[i] != cwsid->authority[i])
+ return (0);
+ }
+
+ /* compare all of the subauth values if any */
+ num_sat = ctsid->num_subauth;
+ num_saw = cwsid->num_subauth;
+ num_subauth = num_sat < num_saw ? num_sat : num_saw;
+ if (num_subauth) {
+ for (i = 0; i < num_subauth; ++i) {
+ if (ctsid->sub_auth[i] != cwsid->sub_auth[i])
+ return (0);
+ }
+ }
+
+ return (1); /* sids compare/match */
+}
+
+void get_mode_from_acl(struct inode * inode, const char * path)
+{
+
+ if (inode == NULL)
+ return;
+
+ /* find an open readable handle
+ if handle found
+ lock handle
+ else open file
+ if no open file can not hurt to check if path is null
+ GetCIFSACL
+ for all ACEs in ACL {
+ if U or G or O
+ inode->i_mode = parse_ace(file_type, UG or O, ace->perms, inode->i_mode)
+ else continue
+ }
+ if handle open close it
+ else unlock handle */
+
+ return;
+}
+
+
+static void parse_ace(struct cifs_ace *pace, char *end_of_acl)
+{
+ int num_subauth;
+
+ /* validate that we do not go past end of acl */
+
+ /* XXX this if statement can be removed
+ if (end_of_acl < (char *)pace + sizeof(struct cifs_ace)) {
+ cERROR(1, ("ACL too small to parse ACE"));
+ return;
+ } */
+
+ num_subauth = pace->num_subauth;
+ if (num_subauth) {
+#ifdef CONFIG_CIFS_DEBUG2
+ int i;
+ cFYI(1, ("ACE revision %d num_subauth %d",
+ pace->revision, pace->num_subauth));
+ for (i = 0; i < num_subauth; ++i) {
+ cFYI(1, ("ACE sub_auth[%d]: 0x%x", i,
+ le32_to_cpu(pace->sub_auth[i])));
+ }
+
+ /* BB add length check to make sure that we do not have huge
+ num auths and therefore go off the end */
+
+ cFYI(1, ("RID %d", le32_to_cpu(pace->sub_auth[num_subauth-1])));
+#endif
+ }
+
+ return;
+}
+
+static void parse_ntace(struct cifs_ntace *pntace, char *end_of_acl)
+{
+ /* validate that we do not go past end of acl */
+ if (end_of_acl < (char *)pntace + sizeof(struct cifs_ntace)) {
+ cERROR(1, ("ACL too small to parse NT ACE"));
+ return;
+ }
+
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("NTACE type %d flags 0x%x size %d, access Req 0x%x",
+ pntace->type, pntace->flags, pntace->size,
+ pntace->access_req));
+#endif
+ return;
+}
+
+
+
+static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
+ struct cifs_sid *pownersid, struct cifs_sid *pgrpsid)
+{
+ int i;
+ int num_aces = 0;
+ int acl_size;
+ char *acl_base;
+ struct cifs_ntace **ppntace;
+ struct cifs_ace **ppace;
+
+ /* BB need to add parm so we can store the SID BB */
+
+ /* validate that we do not go past end of acl */
+ if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) {
+ cERROR(1, ("ACL too small to parse DACL"));
+ return;
+ }
+
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("DACL revision %d size %d num aces %d",
+ le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size),
+ le32_to_cpu(pdacl->num_aces)));
+#endif
+
+ acl_base = (char *)pdacl;
+ acl_size = sizeof(struct cifs_acl);
+
+ num_aces = le32_to_cpu(pdacl->num_aces);
+ if (num_aces > 0) {
+ ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
+ GFP_KERNEL);
+ ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
+ GFP_KERNEL);
+
+/* cifscred->cecount = pdacl->num_aces;
+ cifscred->ntaces = kmalloc(num_aces *
+ sizeof(struct cifs_ntace *), GFP_KERNEL);
+ cifscred->aces = kmalloc(num_aces *
+ sizeof(struct cifs_ace *), GFP_KERNEL);*/
+
+ for (i = 0; i < num_aces; ++i) {
+ ppntace[i] = (struct cifs_ntace *)
+ (acl_base + acl_size);
+ ppace[i] = (struct cifs_ace *) ((char *)ppntace[i] +
+ sizeof(struct cifs_ntace));
+
+ parse_ntace(ppntace[i], end_of_acl);
+ if (end_of_acl < ((char *)ppace[i] +
+ (le16_to_cpu(ppntace[i]->size) -
+ sizeof(struct cifs_ntace)))) {
+ cERROR(1, ("ACL too small to parse ACE"));
+ break;
+ } else
+ parse_ace(ppace[i], end_of_acl);
+
+/* memcpy((void *)(&(cifscred->ntaces[i])),
+ (void *)ppntace[i],
+ sizeof(struct cifs_ntace));
+ memcpy((void *)(&(cifscred->aces[i])),
+ (void *)ppace[i],
+ sizeof(struct cifs_ace)); */
+
+ acl_base = (char *)ppntace[i];
+ acl_size = le16_to_cpu(ppntace[i]->size);
+ }
+
+ kfree(ppace);
+ kfree(ppntace);
+ }
+
+ return;
+}
+
static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
{
+
/* BB need to add parm so we can store the SID BB */
/* validate that we do not go past end of acl */
if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) {
- cERROR(1, ("ACL to small to parse SID"));
+ cERROR(1, ("ACL too small to parse SID"));
return -EINVAL;
}
+
+ if (psid->num_subauth) {
#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
- psid->revision, psid->num_auth, psid->sub_auth[0]));
+ int i;
+ cFYI(1, ("SID revision %d num_auth %d First subauth 0x%x",
+ psid->revision, psid->num_subauth, psid->sub_auth[0]));
+
+ for (i = 0; i < psid->num_subauth; i++) {
+ cFYI(1, ("SID sub_auth[%d]: 0x%x ", i,
+ le32_to_cpu(psid->sub_auth[i])));
+ }
- /* BB add length check to make sure that we do not have huge num auths
- and therefore go off the end */
- cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_auth])));
+ /* BB add length check to make sure that we do not have huge
+ num auths and therefore go off the end */
+ cFYI(1, ("RID 0x%x",
+ le32_to_cpu(psid->sub_auth[psid->num_subauth-1])));
#endif
+ }
+
return 0;
}
+
/* Convert CIFS ACL to POSIX form */
int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
{
- int i, rc;
- int num_aces = 0;
- int acl_size;
+ int rc;
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
- struct cifs_ntace **ppntace;
- struct cifs_ace **ppace;
- char *acl_base;
char *end_of_acl = ((char *)pntsd) + acl_len;
owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
- cpu_to_le32(pntsd->osidoffset));
+ le32_to_cpu(pntsd->osidoffset));
group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
- cpu_to_le32(pntsd->gsidoffset));
+ le32_to_cpu(pntsd->gsidoffset));
dacl_ptr = (struct cifs_acl *)((char *)pntsd +
- cpu_to_le32(pntsd->dacloffset));
+ le32_to_cpu(pntsd->dacloffset));
#ifdef CONFIG_CIFS_DEBUG2
cFYI(1, ("revision %d type 0x%x ooffset 0x%x goffset 0x%x "
"sacloffset 0x%x dacloffset 0x%x",
- pntsd->revision, pntsd->type,
- pntsd->osidoffset, pntsd->gsidoffset, pntsd->sacloffset,
- pntsd->dacloffset));
+ pntsd->revision, pntsd->type, le32_to_cpu(pntsd->osidoffset),
+ le32_to_cpu(pntsd->gsidoffset),
+ le32_to_cpu(pntsd->sacloffset),
+ le32_to_cpu(pntsd->dacloffset)));
#endif
rc = parse_sid(owner_sid_ptr, end_of_acl);
if (rc)
if (rc)
return rc;
+ parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, group_sid_ptr);
+
/* cifscred->uid = owner_sid_ptr->rid;
cifscred->gid = group_sid_ptr->rid;
memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
sizeof (struct cifs_sid)); */
- num_aces = cpu_to_le32(dacl_ptr->num_aces);
- cFYI(1, ("num aces %d", num_aces));
- if (num_aces > 0) {
- ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
- GFP_KERNEL);
- ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
- GFP_KERNEL);
-
-/* cifscred->cecount = dacl_ptr->num_aces;
- cifscred->ntaces = kmalloc(num_aces *
- sizeof(struct cifs_ntace *), GFP_KERNEL);
- cifscred->aces = kmalloc(num_aces *
- sizeof(struct cifs_ace *), GFP_KERNEL);*/
-
- acl_base = (char *)dacl_ptr;
- acl_size = sizeof(struct cifs_acl);
-
- for (i = 0; i < num_aces; ++i) {
- ppntace[i] = (struct cifs_ntace *)
- (acl_base + acl_size);
- ppace[i] = (struct cifs_ace *)
- ((char *)ppntace[i] +
- sizeof(struct cifs_ntace));
-
-/* memcpy((void *)(&(cifscred->ntaces[i])),
- (void *)ntace_ptrptr[i],
- sizeof(struct cifs_ntace));
- memcpy((void *)(&(cifscred->aces[i])),
- (void *)ace_ptrptr[i],
- sizeof(struct cifs_ace)); */
-
- acl_base = (char *)ppntace[i];
- acl_size = cpu_to_le32(ppntace[i]->size);
-#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("ACE revision:%d", ppace[i]->revision));
-#endif
- }
- kfree(ppace);
- kfree(ppntace);
- }
return (0);
}
+#endif /* CONFIG_CIFS_EXPERIMENTAL */
git.samba.org / sfrench / cifs-2.6.git / blobdiff