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[CIFS] CIFS ACL support (part 2)
Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Shirish Pargaonkar
Steve French
parent
a8a11d399f
commit
d0d66c443a
@ -24,48 +24,178 @@
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#include <linux/fs.h>
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsacl.h"
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#include "cifsproto.h"
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#include "cifs_debug.h"
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#include "cifsacl.h"
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/* security id for everyone */
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static const struct cifs_sid sid_everyone =
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{1, 1, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}};
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{1, 1, {0, 0, 0, 0, 0, 0}, {}};
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/* group users */
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static const struct cifs_sid sid_user =
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{1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}};
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{1, 2 , {0, 0, 0, 0, 0, 5}, {}};
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static void parse_ace(struct cifs_ace * pace, char * end_of_acl)
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{
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int i;
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int num_subauth;
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__u32 *psub_auth;
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/* validate that we do not go past end of acl */
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if (end_of_acl < (char *)pace + sizeof(struct cifs_ace)) {
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cERROR(1, ("ACL too small to parse ACE"));
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return;
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}
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num_subauth = cpu_to_le32(pace->num_subauth);
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if (num_subauth) {
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psub_auth = (__u32 *)((char *)pace + sizeof(struct cifs_ace));
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("ACE revision %d num_subauth %d",
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pace->revision, pace->num_subauth));
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for (i = 0; i < num_subauth; ++i) {
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cFYI(1, ("ACE sub_auth[%d]: 0x%x", i,
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le32_to_cpu(psub_auth[i])));
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}
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/* BB add length check to make sure that we do not have huge
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num auths and therefore go off the end */
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cFYI(1, ("RID %d", le32_to_cpu(psub_auth[num_subauth-1])));
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#endif
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}
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return;
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}
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static void parse_ntace(struct cifs_ntace * pntace, char * end_of_acl)
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{
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/* validate that we do not go past end of acl */
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if (end_of_acl < (char *)pntace + sizeof(struct cifs_ntace)) {
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cERROR(1, ("ACL too small to parse NT ACE"));
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return;
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}
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("NTACE type %d flags 0x%x size %d, access Req 0x%x",
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pntace->type, pntace->flags, pntace->size,
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pntace->access_req));
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#endif
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return;
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}
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static void parse_dacl(struct cifs_acl * pdacl, char * end_of_acl)
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{
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int i;
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int num_aces = 0;
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int acl_size;
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char *acl_base;
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struct cifs_ntace **ppntace;
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struct cifs_ace **ppace;
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/* BB need to add parm so we can store the SID BB */
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/* validate that we do not go past end of acl */
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if (end_of_acl < (char *)pdacl + pdacl->size) {
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cERROR(1, ("ACL too small to parse DACL"));
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return;
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}
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("DACL revision %d size %d num aces %d",
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pdacl->revision, pdacl->size, pdacl->num_aces));
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#endif
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acl_base = (char *)pdacl;
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acl_size = sizeof(struct cifs_acl);
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num_aces = cpu_to_le32(pdacl->num_aces);
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if (num_aces > 0) {
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ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
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GFP_KERNEL);
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ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
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GFP_KERNEL);
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/* cifscred->cecount = pdacl->num_aces;
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cifscred->ntaces = kmalloc(num_aces *
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sizeof(struct cifs_ntace *), GFP_KERNEL);
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cifscred->aces = kmalloc(num_aces *
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sizeof(struct cifs_ace *), GFP_KERNEL);*/
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for (i = 0; i < num_aces; ++i) {
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ppntace[i] = (struct cifs_ntace *)
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(acl_base + acl_size);
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ppace[i] = (struct cifs_ace *) ((char *)ppntace[i] +
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sizeof(struct cifs_ntace));
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parse_ntace(ppntace[i], end_of_acl);
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parse_ace(ppace[i], end_of_acl);
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/* memcpy((void *)(&(cifscred->ntaces[i])),
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(void *)ppntace[i],
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sizeof(struct cifs_ntace));
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memcpy((void *)(&(cifscred->aces[i])),
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(void *)ppace[i],
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sizeof(struct cifs_ace)); */
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acl_base = (char *)ppntace[i];
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acl_size = cpu_to_le32(ppntace[i]->size);
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}
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kfree(ppace);
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kfree(ppntace);
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}
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return;
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}
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static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
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{
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int i;
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int num_subauth;
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__u32 *psub_auth;
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/* BB need to add parm so we can store the SID BB */
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/* validate that we do not go past end of acl */
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if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) {
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cERROR(1, ("ACL to small to parse SID"));
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cERROR(1, ("ACL too small to parse SID"));
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return -EINVAL;
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}
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
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psid->revision, psid->num_subauth, psid->sub_auth[0]));
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/* BB add length check to make sure that we do not have huge num auths
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and therefore go off the end */
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cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_subauth])));
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num_subauth = cpu_to_le32(psid->num_subauth);
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if (num_subauth) {
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psub_auth = (__u32 *)((char *)psid + sizeof(struct cifs_sid));
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("SID revision %d num_auth %d First subauth 0x%x",
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psid->revision, psid->num_subauth, psid->sub_auth[0]));
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for (i = 0; i < num_subauth; ++i) {
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cFYI(1, ("SID sub_auth[%d]: 0x%x ", i,
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le32_to_cpu(psub_auth[i])));
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}
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/* BB add length check to make sure that we do not have huge
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num auths and therefore go off the end */
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cFYI(1, ("RID 0x%x",
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le32_to_cpu(psid->sub_auth[psid->num_subauth])));
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#endif
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}
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return 0;
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}
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/* Convert CIFS ACL to POSIX form */
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int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
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{
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int i, rc;
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int num_aces = 0;
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int acl_size;
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int rc;
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struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
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struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
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struct cifs_ntace **ppntace;
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struct cifs_ace **ppace;
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char *acl_base;
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char *end_of_acl = ((char *)pntsd) + acl_len;
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owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
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@ -89,6 +219,8 @@ int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
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if (rc)
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return rc;
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parse_dacl(dacl_ptr, end_of_acl);
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/* cifscred->uid = owner_sid_ptr->rid;
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cifscred->gid = group_sid_ptr->rid;
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memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
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@ -96,46 +228,5 @@ int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
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memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
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sizeof (struct cifs_sid)); */
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num_aces = cpu_to_le32(dacl_ptr->num_aces);
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cFYI(1, ("num aces %d", num_aces));
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if (num_aces > 0) {
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ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
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GFP_KERNEL);
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ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
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GFP_KERNEL);
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/* cifscred->cecount = dacl_ptr->num_aces;
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cifscred->ntaces = kmalloc(num_aces *
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sizeof(struct cifs_ntace *), GFP_KERNEL);
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cifscred->aces = kmalloc(num_aces *
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sizeof(struct cifs_ace *), GFP_KERNEL);*/
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acl_base = (char *)dacl_ptr;
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acl_size = sizeof(struct cifs_acl);
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for (i = 0; i < num_aces; ++i) {
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ppntace[i] = (struct cifs_ntace *)
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(acl_base + acl_size);
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ppace[i] = (struct cifs_ace *)
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((char *)ppntace[i] +
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sizeof(struct cifs_ntace));
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/* memcpy((void *)(&(cifscred->ntaces[i])),
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(void *)ntace_ptrptr[i],
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sizeof(struct cifs_ntace));
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memcpy((void *)(&(cifscred->aces[i])),
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(void *)ace_ptrptr[i],
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sizeof(struct cifs_ace)); */
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acl_base = (char *)ppntace[i];
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acl_size = cpu_to_le32(ppntace[i]->size);
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("ACE revision:%d", ppace[i]->revision));
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#endif
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}
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kfree(ppace);
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kfree(ppntace);
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}
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return (0);
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}
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@ -44,14 +44,14 @@ struct cifs_acl {
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__u32 num_aces;
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} __attribute__((packed));
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struct cifs_ntace {
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struct cifs_ntace { /* first part of ACE which contains perms */
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__u8 type;
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__u8 flags;
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__u16 size;
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__u32 access_req;
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} __attribute__((packed));
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struct cifs_ace {
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struct cifs_ace { /* last part of ACE which includes user info */
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__u8 revision; /* revision level */
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__u8 num_subauth;
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__u8 authority[6];
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@ -310,7 +310,7 @@ extern void setup_ntlmv2_rsp(struct cifsSesInfo *, char *,
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#ifdef CONFIG_CIFS_WEAK_PW_HASH
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extern void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key);
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#endif /* CIFS_WEAK_PW_HASH */
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extern int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len);
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extern int parse_sec_desc(struct cifs_ntsd *, int);
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extern int CIFSSMBCopy(int xid,
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struct cifsTconInfo *source_tcon,
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const char *fromName,
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@ -34,10 +34,10 @@
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#include <asm/uaccess.h>
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsacl.h"
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#include "cifsproto.h"
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#include "cifs_unicode.h"
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#include "cifs_debug.h"
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#include "cifsacl.h"
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#ifdef CONFIG_CIFS_POSIX
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static struct {
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