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samba-mirror/librpc/ndr/uuid.c
Volker Lendecke 2b9ba992b6 lib: Simplify parse_guid_string() and ndr_syntax_id_from_string()
Return "bool" instead of NTSTATUS, use hex_byte() instead of
read_hex_bytes(). And parse directly into a struct GUID instead of the
components. 99 lines less code.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
2021-01-28 16:58:35 +00:00

271 lines
6.4 KiB
C

/*
Unix SMB/CIFS implementation.
UUID/GUID functions
Copyright (C) Theodore Ts'o 1996, 1997,
Copyright (C) Jim McDonough 2002.
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "lib/util/samba_util.h"
#include "lib/util/genrand.h"
#include "librpc/ndr/libndr.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "lib/util/util_str_hex.h"
_PUBLIC_ NTSTATUS GUID_to_ndr_buf(
const struct GUID *guid, struct GUID_ndr_buf *buf)
{
DATA_BLOB b = { .data = buf->buf, .length = sizeof(buf->buf), };
enum ndr_err_code ndr_err;
ndr_err = ndr_push_struct_into_fixed_blob(
&b, guid, (ndr_push_flags_fn_t)ndr_push_GUID);
return ndr_map_error2ntstatus(ndr_err);
}
/**
build a NDR blob from a GUID
*/
_PUBLIC_ NTSTATUS GUID_to_ndr_blob(const struct GUID *guid, TALLOC_CTX *mem_ctx, DATA_BLOB *b)
{
struct GUID_ndr_buf buf = { .buf = {0}, };
NTSTATUS status;
status = GUID_to_ndr_buf(guid, &buf);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
*b = data_blob_talloc(mem_ctx, buf.buf, sizeof(buf.buf));
if (b->data == NULL) {
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
/**
build a GUID from a NDR data blob
*/
_PUBLIC_ NTSTATUS GUID_from_ndr_blob(const DATA_BLOB *b, struct GUID *guid)
{
enum ndr_err_code ndr_err =
ndr_pull_struct_blob_all_noalloc(b, guid,
(ndr_pull_flags_fn_t)ndr_pull_GUID);
return ndr_map_error2ntstatus(ndr_err);
}
/**
build a GUID from a string
*/
_PUBLIC_ NTSTATUS GUID_from_data_blob(const DATA_BLOB *s, struct GUID *guid)
{
bool ok;
if (s->data == NULL) {
return NT_STATUS_INVALID_PARAMETER;
}
if (s->length == 36) {
ok = parse_guid_string((char *)s->data, guid);
return ok ? NT_STATUS_OK : NT_STATUS_INVALID_PARAMETER;
}
if (s->length == 38) {
if (s->data[0] != '{' || s->data[37] != '}') {
return NT_STATUS_INVALID_PARAMETER;
}
ok = parse_guid_string((char *)s->data + 1, guid);
return ok ? NT_STATUS_OK : NT_STATUS_INVALID_PARAMETER;
}
if (s->length == 32) {
uint8_t buf16[16] = {0};
DATA_BLOB blob16 = { .data = buf16, .length = sizeof(buf16) };
size_t rlen = strhex_to_str((char *)blob16.data, blob16.length,
(const char *)s->data, s->length);
if (rlen != blob16.length) {
return NT_STATUS_INVALID_PARAMETER;
}
return GUID_from_ndr_blob(&blob16, guid);
}
if (s->length == 16) {
return GUID_from_ndr_blob(s, guid);
}
return NT_STATUS_INVALID_PARAMETER;
}
/**
build a GUID from a string
*/
_PUBLIC_ NTSTATUS GUID_from_string(const char *s, struct GUID *guid)
{
DATA_BLOB blob = data_blob_string_const(s);
return GUID_from_data_blob(&blob, guid);
}
/**
* generate a random GUID
*/
_PUBLIC_ struct GUID GUID_random(void)
{
struct GUID guid;
generate_random_buffer((uint8_t *)&guid, sizeof(guid));
guid.clock_seq[0] = (guid.clock_seq[0] & 0x3F) | 0x80;
guid.time_hi_and_version = (guid.time_hi_and_version & 0x0FFF) | 0x4000;
return guid;
}
/**
* generate an empty GUID
*/
_PUBLIC_ struct GUID GUID_zero(void)
{
struct GUID guid;
ZERO_STRUCT(guid);
return guid;
}
_PUBLIC_ bool GUID_all_zero(const struct GUID *u)
{
if (u->time_low != 0 ||
u->time_mid != 0 ||
u->time_hi_and_version != 0 ||
u->clock_seq[0] != 0 ||
u->clock_seq[1] != 0 ||
!all_zero(u->node, 6)) {
return false;
}
return true;
}
_PUBLIC_ bool GUID_equal(const struct GUID *u1, const struct GUID *u2)
{
return (GUID_compare(u1, u2) == 0);
}
_PUBLIC_ int GUID_compare(const struct GUID *u1, const struct GUID *u2)
{
if (u1->time_low != u2->time_low) {
return u1->time_low > u2->time_low ? 1 : -1;
}
if (u1->time_mid != u2->time_mid) {
return u1->time_mid > u2->time_mid ? 1 : -1;
}
if (u1->time_hi_and_version != u2->time_hi_and_version) {
return u1->time_hi_and_version > u2->time_hi_and_version ? 1 : -1;
}
if (u1->clock_seq[0] != u2->clock_seq[0]) {
return u1->clock_seq[0] > u2->clock_seq[0] ? 1 : -1;
}
if (u1->clock_seq[1] != u2->clock_seq[1]) {
return u1->clock_seq[1] > u2->clock_seq[1] ? 1 : -1;
}
return memcmp(u1->node, u2->node, 6);
}
/**
its useful to be able to display these in debugging messages
*/
_PUBLIC_ char *GUID_string(TALLOC_CTX *mem_ctx, const struct GUID *guid)
{
struct GUID_txt_buf buf;
return talloc_strdup(mem_ctx, GUID_buf_string(guid, &buf));
}
/**
* Does the same without allocating memory, using the structure buffer.
* Useful for debug messages, so that you do not have to talloc_free the result
*/
_PUBLIC_ char* GUID_buf_string(const struct GUID *guid,
struct GUID_txt_buf *dst)
{
if (!guid) {
return NULL;
}
snprintf(dst->buf, sizeof(dst->buf),
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
guid->time_low, guid->time_mid,
guid->time_hi_and_version,
guid->clock_seq[0],
guid->clock_seq[1],
guid->node[0], guid->node[1],
guid->node[2], guid->node[3],
guid->node[4], guid->node[5]);
return dst->buf;
}
_PUBLIC_ char *GUID_string2(TALLOC_CTX *mem_ctx, const struct GUID *guid)
{
char *ret, *s = GUID_string(mem_ctx, guid);
ret = talloc_asprintf(mem_ctx, "{%s}", s);
talloc_free(s);
return ret;
}
_PUBLIC_ char *GUID_hexstring(TALLOC_CTX *mem_ctx, const struct GUID *guid)
{
char *ret;
DATA_BLOB guid_blob;
TALLOC_CTX *tmp_mem;
NTSTATUS status;
tmp_mem = talloc_new(mem_ctx);
if (!tmp_mem) {
return NULL;
}
status = GUID_to_ndr_blob(guid, tmp_mem, &guid_blob);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(tmp_mem);
return NULL;
}
ret = data_blob_hex_string_upper(mem_ctx, &guid_blob);
talloc_free(tmp_mem);
return ret;
}
_PUBLIC_ bool ndr_policy_handle_empty(const struct policy_handle *h)
{
return (h->handle_type == 0 && GUID_all_zero(&h->uuid));
}
_PUBLIC_ bool ndr_policy_handle_equal(const struct policy_handle *hnd1,
const struct policy_handle *hnd2)
{
if (!hnd1 || !hnd2) {
return false;
}
return (memcmp(hnd1, hnd2, sizeof(*hnd1)) == 0);
}