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server: Include user groups in file mode calculation when user is file owner.

This commit is contained in:
Ben Peddell 2009-12-10 01:31:53 +10:00 committed by Alexandre Julliard
parent dec7dda411
commit b419df1de4
4 changed files with 28 additions and 4 deletions
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2
server/change.c
View File

@ -373,7 +373,7 @@ static int dir_set_sd( struct object *obj, const struct security_descriptor *sd,
if (set_info & DACL_SECURITY_INFORMATION)
{
/* keep the bits that we don't map to access rights in the ACL */
mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXG);
mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX);
mode |= sd_to_mode( sd, owner );
if (((st.st_mode ^ mode) & (S_IRWXU|S_IRWXG|S_IRWXO)) && fchmod( unix_fd, mode ) == -1)

27
server/file.c
View File

@ -447,6 +447,7 @@ mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner )
mode_t denied_mode = 0;
int present;
const ACL *dacl = sd_get_dacl( sd, &present );
const SID *user = token_get_user( current->process->token );
if (present && dacl)
{
const ACE_HEADER *ace = (const ACE_HEADER *)(dacl + 1);
@ -484,6 +485,17 @@ mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner )
if (access & FILE_EXECUTE)
denied_mode |= S_IXUSR;
}
else if ((security_equal_sid( user, owner ) &&
token_sid_present( current->process->token, sid, TRUE )))
{
unsigned int access = generic_file_map_access( ad_ace->Mask );
if (access & FILE_READ_DATA)
denied_mode |= S_IRUSR|S_IRGRP;
if (access & FILE_WRITE_DATA)
denied_mode |= S_IWUSR|S_IWGRP;
if (access & FILE_EXECUTE)
denied_mode |= S_IXUSR|S_IXGRP;
}
break;
case ACCESS_ALLOWED_ACE_TYPE:
aa_ace = (const ACCESS_ALLOWED_ACE *)ace;
@ -508,13 +520,24 @@ mode_t sd_to_mode( const struct security_descriptor *sd, const SID *owner )
if (access & FILE_EXECUTE)
new_mode |= S_IXUSR;
}
else if ((security_equal_sid( user, owner ) &&
token_sid_present( current->process->token, sid, FALSE )))
{
unsigned int access = generic_file_map_access( ad_ace->Mask );
if (access & FILE_READ_DATA)
new_mode |= S_IRUSR|S_IRGRP;
if (access & FILE_WRITE_DATA)
new_mode |= S_IWUSR|S_IWGRP;
if (access & FILE_EXECUTE)
new_mode |= S_IXUSR|S_IXGRP;
}
break;
}
}
}
else
/* no ACL means full access rights to anyone */
new_mode = S_IRWXU | S_IRWXO;
new_mode = S_IRWXU | S_IRWXG | S_IRWXO;
return new_mode & ~denied_mode;
}
@ -557,7 +580,7 @@ static int file_set_sd( struct object *obj, const struct security_descriptor *sd
if (set_info & DACL_SECURITY_INFORMATION)
{
/* keep the bits that we don't map to access rights in the ACL */
mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXG);
mode = st.st_mode & (S_ISUID|S_ISGID|S_ISVTX);
mode |= sd_to_mode( sd, owner );
if (((st.st_mode ^ mode) & (S_IRWXU|S_IRWXG|S_IRWXO)) && fchmod( unix_fd, mode ) == -1)

1
server/security.h
View File

@ -55,6 +55,7 @@ extern int token_check_privileges( struct token *token, int all_required,
extern const ACL *token_get_default_dacl( struct token *token );
extern const SID *token_get_user( struct token *token );
extern const SID *token_get_primary_group( struct token *token );
extern int token_sid_present( struct token *token, const SID *sid, int deny);
static inline const ACE_HEADER *ace_next( const ACE_HEADER *ace )
{

2
server/token.c
View File

@ -776,7 +776,7 @@ int token_check_privileges( struct token *token, int all_required,
return (enabled_count > 0);
}
static int token_sid_present( struct token *token, const SID *sid, int deny )
int token_sid_present( struct token *token, const SID *sid, int deny )
{
struct group *group;