struct security_descriptor *get_share_security( TALLOC_CTX *ctx, const char *servicename,
size_t *psize)
{
char *key;
struct security_descriptor *psd = NULL;
TDB_DATA data;
char *c_servicename = canonicalize_servicename(talloc_tos(), servicename);
NTSTATUS status;
if (!c_servicename) {
return NULL;
}
if (!share_info_db_init()) {
TALLOC_FREE(c_servicename);
return NULL;
}
if (!(key = talloc_asprintf(ctx, SHARE_SECURITY_DB_KEY_PREFIX_STR "%s", c_servicename))) {
TALLOC_FREE(c_servicename);
DEBUG(0, ("talloc_asprintf failed\n"));
return NULL;
}
TALLOC_FREE(c_servicename);
status = dbwrap_fetch_bystring(share_db, talloc_tos(), key, &data);
TALLOC_FREE(key);
if (!NT_STATUS_IS_OK(status)) {
return get_share_security_default(ctx, psize,
SEC_RIGHTS_DIR_ALL);
}
status = unmarshall_sec_desc(ctx, data.dptr, data.dsize, &psd);
TALLOC_FREE(data.dptr);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("unmarshall_sec_desc failed: %s\n",
nt_errstr(status)));
return get_share_security_default(ctx, psize,
SEC_RIGHTS_DIR_ALL);
}
if (psd) {
*psize = ndr_size_security_descriptor(psd, 0);
} else {
return get_share_security_default(ctx, psize,
SEC_RIGHTS_DIR_ALL);
}
return psd;
}
SEC_DESC *get_share_security( TALLOC_CTX *ctx, const char *servicename,
size_t *psize)
{
prs_struct ps;
fstring key;
SEC_DESC *psd = NULL;
if (!share_info_db_init()) {
return NULL;
}
*psize = 0;
/* Fetch security descriptor from tdb */
slprintf(key, sizeof(key)-1, "SECDESC/%s", servicename);
if (tdb_prs_fetch(share_tdb, key, &ps, ctx)!=0 ||
!sec_io_desc("get_share_security", &psd, &ps, 1)) {
DEBUG(4, ("get_share_security: using default secdesc for %s\n",
servicename));
return get_share_security_default(ctx, psize, GENERIC_ALL_ACCESS);
}
if (psd)
*psize = sec_desc_size(psd);
prs_mem_free(&ps);
return psd;
}
SEC_DESC *get_share_security( TALLOC_CTX *ctx, const char *servicename,
size_t *psize)
{
char *key;
SEC_DESC *psd = NULL;
TDB_DATA data;
NTSTATUS status;
if (!share_info_db_init()) {
return NULL;
}
if (!(key = talloc_asprintf(ctx, "SECDESC/%s", servicename))) {
DEBUG(0, ("talloc_asprintf failed\n"));
return NULL;
}
data = dbwrap_fetch_bystring(share_db, talloc_tos(), key);
TALLOC_FREE(key);
if (data.dptr == NULL) {
return get_share_security_default(ctx, psize,
GENERIC_ALL_ACCESS);
}
status = unmarshall_sec_desc(ctx, data.dptr, data.dsize, &psd);
TALLOC_FREE(data.dptr);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("unmarshall_sec_desc failed: %s\n",
nt_errstr(status)));
return NULL;
}
if (psd)
*psize = ndr_size_security_descriptor(psd, NULL, 0);
return psd;
}
BOOL parse_usershare_acl(TALLOC_CTX *ctx, const char *acl_str, SEC_DESC **ppsd)
{
size_t s_size = 0;
const char *pacl = acl_str;
int num_aces = 0;
SEC_ACE *ace_list = NULL;
SEC_ACL *psa = NULL;
SEC_DESC *psd = NULL;
size_t sd_size = 0;
int i;
*ppsd = NULL;
/* If the acl string is blank return "Everyone:R" */
if (!*acl_str) {
SEC_DESC *default_psd = get_share_security_default(ctx, &s_size, GENERIC_READ_ACCESS);
if (!default_psd) {
return False;
}
*ppsd = default_psd;
return True;
}
num_aces = 1;
/* Add the number of ',' characters to get the number of aces. */
num_aces += count_chars(pacl,',');
ace_list = TALLOC_ARRAY(ctx, SEC_ACE, num_aces);
if (!ace_list) {
return False;
}
for (i = 0; i < num_aces; i++) {
SEC_ACCESS sa;
uint32 g_access;
uint32 s_access;
DOM_SID sid;
fstring sidstr;
uint8 type = SEC_ACE_TYPE_ACCESS_ALLOWED;
if (!next_token(&pacl, sidstr, ":", sizeof(sidstr))) {
DEBUG(0,("parse_usershare_acl: malformed usershare acl looking "
"for ':' in string '%s'\n", pacl));
return False;
}
if (!string_to_sid(&sid, sidstr)) {
DEBUG(0,("parse_usershare_acl: failed to convert %s to sid.\n",
sidstr ));
return False;
}
switch (*pacl) {
case 'F': /* Full Control, ie. R+W */
case 'f': /* Full Control, ie. R+W */
s_access = g_access = GENERIC_ALL_ACCESS;
break;
case 'R': /* Read only. */
case 'r': /* Read only. */
s_access = g_access = GENERIC_READ_ACCESS;
break;
case 'D': /* Deny all to this SID. */
case 'd': /* Deny all to this SID. */
type = SEC_ACE_TYPE_ACCESS_DENIED;
s_access = g_access = GENERIC_ALL_ACCESS;
break;
default:
DEBUG(0,("parse_usershare_acl: unknown acl type at %s.\n",
pacl ));
return False;
}
pacl++;
if (*pacl && *pacl != ',') {
DEBUG(0,("parse_usershare_acl: bad acl string at %s.\n",
pacl ));
return False;
}
pacl++; /* Go past any ',' */
se_map_generic(&s_access, &file_generic_mapping);
init_sec_access(&sa, g_access | s_access );
init_sec_ace(&ace_list[i], &sid, type, sa, 0);
}
if ((psa = make_sec_acl(ctx, NT4_ACL_REVISION, num_aces, ace_list)) != NULL) {
psd = make_sec_desc(ctx, SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE, NULL, NULL, NULL, psa, &sd_size);
}
if (!psd) {
DEBUG(0,("parse_usershare_acl: Failed to make SEC_DESC.\n"));
return False;
}
*ppsd = psd;
return True;
}
