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/*
Unix SMB/CIFS implementation.
auto-idl scanner
Copyright (C) Andrew Tridgell 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
get a handle - doesn't really matter what type
*/
static BOOL get_policy_handle(struct dcerpc_pipe *p, TALLOC_CTX *mem_ctx,
struct policy_handle *handle)
{
NTSTATUS status;
struct samr_Connect r;
r.in.system_name = 0;
r.in.access_mask = SEC_RIGHTS_MAXIMUM_ALLOWED;
r.out.connect_handle = handle;
status = dcerpc_samr_Connect(p, mem_ctx, &r);
if (!NT_STATUS_IS_OK(status)) {
printf("samr_Connect failed - %s\n", nt_errstr(status));
return False;
}
return True;
}
static void fill_blob_handle(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
struct policy_handle *handle)
{
DATA_BLOB b2;
if (blob->length < 20) {
return;
}
ndr_push_struct_blob(&b2, mem_ctx, handle, (ndr_push_flags_fn_t)ndr_push_policy_handle);
memcpy(blob->data, b2.data, 20);
}
static void reopen(struct dcerpc_pipe **p, const struct dcerpc_interface_table *iface)
{
NTSTATUS status;
if (*p) {
dcerpc_pipe_close(*p);
}
status = torture_rpc_connection(p, iface->endpoints->names[0], iface->uuid, iface->if_version);
if (!NT_STATUS_IS_OK(status)) {
printf("Failed to reopen '%s' - %s\n", iface->name, nt_errstr(status));
exit(1);
}
}
static void print_depth(int depth)
{
int i;
for (i=0;i<depth;i++) {
printf(" ");
}
}
static void test_ptr_scan(TALLOC_CTX *mem_ctx, const struct dcerpc_interface_table *iface,
int opnum, DATA_BLOB *base_in, int min_ofs, int max_ofs, int depth);
static void try_expand(TALLOC_CTX *mem_ctx, const struct dcerpc_interface_table *iface,
int opnum, DATA_BLOB *base_in, int insert_ofs, int depth)
{
DATA_BLOB stub_in, stub_out;
int n;
NTSTATUS status;
struct dcerpc_pipe *p = NULL;
reopen(&p, iface);
/* work out how much to expand to get a non fault */
for (n=0;n<2000;n++) {
stub_in = data_blob(NULL, base_in->length + n);
data_blob_clear(&stub_in);
memcpy(stub_in.data, base_in->data, insert_ofs);
memcpy(stub_in.data+insert_ofs+n, base_in->data+insert_ofs, base_in->length-insert_ofs);
status = dcerpc_request(p, opnum, mem_ctx, &stub_in, &stub_out);
if (!NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
print_depth(depth);
printf("expand by %d gives %s\n", n, nt_errstr(status));
if (n >= 4) {
test_ptr_scan(mem_ctx, iface, opnum, &stub_in,
insert_ofs, insert_ofs+n, depth+1);
}
return;
} else {
#if 0
print_depth(depth);
printf("expand by %d gives fault 0x%x\n", n, p->last_fault_code);
#endif
}
if (p->last_fault_code == 5) {
reopen(&p, iface);
}
}
dcerpc_pipe_close(p);
}
static void test_ptr_scan(TALLOC_CTX *mem_ctx, const struct dcerpc_interface_table *iface,
int opnum, DATA_BLOB *base_in, int min_ofs, int max_ofs, int depth)
{
DATA_BLOB stub_in, stub_out;
int ofs;
NTSTATUS status;
struct dcerpc_pipe *p = NULL;
reopen(&p, iface);
stub_in = data_blob(NULL, base_in->length);
memcpy(stub_in.data, base_in->data, base_in->length);
/* work out which elements are pointers */
for (ofs=min_ofs;ofs<=max_ofs-4;ofs+=4) {
SIVAL(stub_in.data, ofs, 1);
status = dcerpc_request(p, opnum, mem_ctx, &stub_in, &stub_out);
if (NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
print_depth(depth);
printf("possible ptr at ofs %d - fault 0x%08x\n",
ofs-min_ofs, p->last_fault_code);
if (p->last_fault_code == 5) {
reopen(&p, iface);
}
if (depth == 0) {
try_expand(mem_ctx, iface, opnum, &stub_in, ofs+4, depth+1);
} else {
try_expand(mem_ctx, iface, opnum, &stub_in, max_ofs, depth+1);
}
SIVAL(stub_in.data, ofs, 0);
continue;
}
SIVAL(stub_in.data, ofs, 0);
}
dcerpc_pipe_close(p);
}
static void test_scan_call(TALLOC_CTX *mem_ctx, const struct dcerpc_interface_table *iface, int opnum)
{
DATA_BLOB stub_in, stub_out;
int i;
NTSTATUS status;
struct dcerpc_pipe *p = NULL;
struct policy_handle handle;
reopen(&p, iface);
get_policy_handle(p, mem_ctx, &handle);
/* work out the minimum amount of input data */
for (i=0;i<2000;i++) {
stub_in = data_blob(NULL, i);
data_blob_clear(&stub_in);
status = dcerpc_request(p, opnum, mem_ctx, &stub_in, &stub_out);
if (NT_STATUS_IS_OK(status)) {
printf("opnum %d min_input %d - output %d\n",
opnum, stub_in.length, stub_out.length);
dump_data(0, stub_out.data, stub_out.length);
dcerpc_pipe_close(p);
test_ptr_scan(mem_ctx, iface, opnum, &stub_in, 0, stub_in.length, 0);
return;
}
fill_blob_handle(&stub_in, mem_ctx, &handle);
status = dcerpc_request(p, opnum, mem_ctx, &stub_in, &stub_out);
if (NT_STATUS_IS_OK(status)) {
printf("opnum %d min_input %d - output %d (with handle)\n",
opnum, stub_in.length, stub_out.length);
dump_data(0, stub_out.data, stub_out.length);
dcerpc_pipe_close(p);
test_ptr_scan(mem_ctx, iface, opnum, &stub_in, 0, stub_in.length, 0);
return;
}
if (NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
printf("opnum %d size %d fault 0x%08x\n", opnum, i, p->last_fault_code);
if (p->last_fault_code == 5) {
reopen(&p, iface);
}
continue;
}
printf("opnum %d size %d error %s\n", opnum, i, nt_errstr(status));
}
printf("opnum %d minimum not found!?\n", opnum);
dcerpc_pipe_close(p);
}
static void test_auto_scan(TALLOC_CTX *mem_ctx, const struct dcerpc_interface_table *iface)
{
test_scan_call(mem_ctx, iface, 0x42);
}
BOOL torture_rpc_autoidl(int dummy)
{
TALLOC_CTX *mem_ctx;
const struct dcerpc_interface_table *iface;
iface = idl_iface_by_name("samr");
if (!iface) {
printf("Unknown interface!\n");
return False;
}
mem_ctx = talloc_init("torture_rpc_autoidl");
printf("\nProbing pipe '%s'\n", iface->name);
test_auto_scan(mem_ctx, iface);
return True;
}
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