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authorAndrew Tridgell <tridge@samba.org>2005-06-13 06:06:29 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:18:04 -0500
commit816f4f7c4afa1022075fb36563fadf4820f37afd (patch)
tree400e7a462e46a9ca5b6994920cbbea70ad75505a /source4
parent490a5a5d595c021771fb6965829a3821d6dddb6a (diff)
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r7519: rip the copy of the ldap expression parser out of libcli/ldap/ and use
the original one in lib/ldb/ instead. Having two copies of this code is silly. (This used to be commit 0e9f18c44858b692c724c004f362de9e3dc15db5)
Diffstat (limited to 'source4')
-rw-r--r--source4/cldap_server/netlogon.c10
-rw-r--r--source4/libcli/ldap/ldap.c392
-rw-r--r--source4/libcli/ldap/ldap.h38
-rw-r--r--source4/libcli/ldap/ldap_ldif.c12
-rw-r--r--source4/libcli/ldap/ldap_ndr.c22
5 files changed, 48 insertions, 426 deletions
diff --git a/source4/cldap_server/netlogon.c b/source4/cldap_server/netlogon.c
index 9e7ddc6989..f4f1c226af 100644
--- a/source4/cldap_server/netlogon.c
+++ b/source4/cldap_server/netlogon.c
@@ -181,7 +181,7 @@ void cldapd_netlogon_request(struct cldap_socket *cldap,
const char *src_address, int src_port)
{
struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
- struct ldap_parse_tree *tree;
+ struct ldb_parse_tree *tree;
int i;
const char *domain = NULL;
const char *host = NULL;
@@ -197,15 +197,15 @@ void cldapd_netlogon_request(struct cldap_socket *cldap,
DEBUG(5,("cldap filter='%s'\n", filter));
- tree = ldap_parse_filter_string(tmp_ctx, filter);
+ tree = ldb_parse_tree(tmp_ctx, filter);
if (tree == NULL) goto failed;
- if (tree->operation != LDAP_OP_AND) goto failed;
+ if (tree->operation != LDB_OP_AND) goto failed;
/* extract the query elements */
for (i=0;i<tree->u.list.num_elements;i++) {
- struct ldap_parse_tree *t = tree->u.list.elements[i];
- if (t->operation != LDAP_OP_SIMPLE) goto failed;
+ struct ldb_parse_tree *t = tree->u.list.elements[i];
+ if (t->operation != LDB_OP_SIMPLE) goto failed;
if (strcasecmp(t->u.simple.attr, "DnsDomain") == 0) {
domain = talloc_strndup(tmp_ctx,
t->u.simple.value.data,
diff --git a/source4/libcli/ldap/ldap.c b/source4/libcli/ldap/ldap.c
index 0c6a466f27..f383d08074 100644
--- a/source4/libcli/ldap/ldap.c
+++ b/source4/libcli/ldap/ldap.c
@@ -28,350 +28,11 @@
#include "asn_1.h"
#include "libcli/ldap/ldap.h"
-/****************************************************************************
- *
- * LDAP filter parser -- main routine is ldap_parse_filter
- *
- * Shamelessly stolen and adapted from ldb.
- *
- ***************************************************************************/
-
-/*
- return next token element. Caller frees
-*/
-static char *ldap_parse_lex(TALLOC_CTX *mem_ctx, const char **s,
- const char *sep)
-{
- const char *p = *s;
- char *ret;
-
- while (isspace(*p)) {
- p++;
- }
- *s = p;
-
- if (*p == 0) {
- return NULL;
- }
-
- if (strchr(sep, *p)) {
- (*s) = p+1;
- ret = talloc_strndup(mem_ctx, p, 1);
- if (!ret) {
- errno = ENOMEM;
- }
- return ret;
- }
-
- while (*p && (isalnum(*p) || !strchr(sep, *p))) {
- p++;
- }
-
- if (p == *s) {
- return NULL;
- }
-
- ret = talloc_strndup(mem_ctx, *s, p - *s);
- if (!ret) {
- errno = ENOMEM;
- }
-
- *s = p;
-
- return ret;
-}
-
-
-/*
- find a matching close brace in a string
-*/
-static const char *match_brace(const char *s)
-{
- unsigned int count = 0;
- while (*s && (count != 0 || *s != ')')) {
- if (*s == '(') {
- count++;
- }
- if (*s == ')') {
- count--;
- }
- s++;
- }
- if (! *s) {
- return NULL;
- }
- return s;
-}
-
-static struct ldap_parse_tree *ldap_parse_filter(TALLOC_CTX *mem_ctx,
- const char **s);
-
-/*
- decode a RFC2254 binary string representation of a buffer.
- Used in LDAP filters.
-*/
-struct ldap_val ldap_binary_decode(TALLOC_CTX *mem_ctx, const char *str)
-{
- int i, j;
- struct ldap_val ret;
- int slen = strlen(str);
-
- ret.data = talloc_size(mem_ctx, slen);
- ret.length = 0;
- if (ret.data == NULL) return ret;
-
- for (i=j=0;i<slen;i++) {
- if (str[i] == '\\') {
- unsigned c;
- if (sscanf(&str[i+1], "%02X", &c) != 1) {
- talloc_free(ret.data);
- ZERO_STRUCT(ret);
- return ret;
- }
- ((uint8_t *)ret.data)[j++] = c;
- i += 2;
- } else {
- ((uint8_t *)ret.data)[j++] = str[i];
- }
- }
- ret.length = j;
-
- return ret;
-}
-
-
-/*
- encode a blob as a RFC2254 binary string, escaping any
- non-printable or '\' characters
-*/
-const char *ldap_binary_encode(TALLOC_CTX *mem_ctx, DATA_BLOB blob)
-{
- int i;
- char *ret;
- int len = blob.length;
- for (i=0;i<blob.length;i++) {
- if (!isprint(blob.data[i]) || strchr(" *()\\&|!", blob.data[i])) {
- len += 2;
- }
- }
- ret = talloc_array(mem_ctx, char, len+1);
- if (ret == NULL) return NULL;
-
- len = 0;
- for (i=0;i<blob.length;i++) {
- if (!isprint(blob.data[i]) || strchr(" *()\\&|!", blob.data[i])) {
- snprintf(ret+len, 4, "\\%02X", blob.data[i]);
- len += 3;
- } else {
- ret[len++] = blob.data[i];
- }
- }
- ret[len] = 0;
-
- return ret;
-}
-
-
-/*
- <simple> ::= <attributetype> <filtertype> <attributevalue>
-*/
-static struct ldap_parse_tree *ldap_parse_simple(TALLOC_CTX *mem_ctx,
- const char *s)
-{
- char *eq, *val, *l;
- struct ldap_parse_tree *ret;
-
- l = ldap_parse_lex(mem_ctx, &s, LDAP_ALL_SEP);
- if (!l) {
- return NULL;
- }
-
- if (strchr("()&|=", *l))
- return NULL;
-
- eq = ldap_parse_lex(mem_ctx, &s, LDAP_ALL_SEP);
- if (!eq || strcmp(eq, "=") != 0)
- return NULL;
-
- val = ldap_parse_lex(mem_ctx, &s, ")");
- if (val && strchr("()&|", *val))
- return NULL;
-
- ret = talloc(mem_ctx, struct ldap_parse_tree);
- if (!ret) {
- errno = ENOMEM;
- return NULL;
- }
-
- ret->operation = LDAP_OP_SIMPLE;
- ret->u.simple.attr = l;
- ret->u.simple.value = ldap_binary_decode(ret, val);
-
- return ret;
-}
-
-
-/*
- parse a filterlist
- <and> ::= '&' <filterlist>
- <or> ::= '|' <filterlist>
- <filterlist> ::= <filter> | <filter> <filterlist>
-*/
-static struct ldap_parse_tree *ldap_parse_filterlist(TALLOC_CTX *mem_ctx,
- enum ldap_parse_op op,
- const char *s)
-{
- struct ldap_parse_tree *ret, *next;
-
- ret = talloc(mem_ctx, struct ldap_parse_tree);
- if (!ret) {
- errno = ENOMEM;
- return NULL;
- }
-
- ret->operation = op;
- ret->u.list.num_elements = 1;
- ret->u.list.elements = talloc(mem_ctx, struct ldap_parse_tree *);
- if (!ret->u.list.elements) {
- errno = ENOMEM;
- return NULL;
- }
-
- ret->u.list.elements[0] = ldap_parse_filter(mem_ctx, &s);
- if (!ret->u.list.elements[0]) {
- return NULL;
- }
-
- while (isspace(*s)) s++;
-
- while (*s && (next = ldap_parse_filter(mem_ctx, &s))) {
- struct ldap_parse_tree **e;
- e = talloc_realloc(ret,
- ret->u.list.elements,
- struct ldap_parse_tree *,
- ret->u.list.num_elements+1);
- if (!e) {
- errno = ENOMEM;
- return NULL;
- }
- ret->u.list.elements = e;
- ret->u.list.elements[ret->u.list.num_elements] = next;
- ret->u.list.num_elements++;
- while (isspace(*s)) s++;
- }
-
- return ret;
-}
-
-
-/*
- <not> ::= '!' <filter>
-*/
-static struct ldap_parse_tree *ldap_parse_not(TALLOC_CTX *mem_ctx, const char *s)
-{
- struct ldap_parse_tree *ret;
-
- ret = talloc(mem_ctx, struct ldap_parse_tree);
- if (!ret) {
- errno = ENOMEM;
- return NULL;
- }
-
- ret->operation = LDAP_OP_NOT;
- ret->u.not.child = ldap_parse_filter(mem_ctx, &s);
- if (!ret->u.not.child)
- return NULL;
-
- return ret;
-}
-
-/*
- parse a filtercomp
- <filtercomp> ::= <and> | <or> | <not> | <simple>
-*/
-static struct ldap_parse_tree *ldap_parse_filtercomp(TALLOC_CTX *mem_ctx,
- const char *s)
-{
- while (isspace(*s)) s++;
-
- switch (*s) {
- case '&':
- return ldap_parse_filterlist(mem_ctx, LDAP_OP_AND, s+1);
-
- case '|':
- return ldap_parse_filterlist(mem_ctx, LDAP_OP_OR, s+1);
-
- case '!':
- return ldap_parse_not(mem_ctx, s+1);
-
- case '(':
- case ')':
- return NULL;
- }
-
- return ldap_parse_simple(mem_ctx, s);
-}
-
-
-/*
- <filter> ::= '(' <filtercomp> ')'
-*/
-static struct ldap_parse_tree *ldap_parse_filter(TALLOC_CTX *mem_ctx,
- const char **s)
-{
- char *l, *s2;
- const char *p, *p2;
- struct ldap_parse_tree *ret;
-
- l = ldap_parse_lex(mem_ctx, s, LDAP_ALL_SEP);
- if (!l) {
- return NULL;
- }
-
- if (strcmp(l, "(") != 0) {
- return NULL;
- }
-
- p = match_brace(*s);
- if (!p) {
- return NULL;
- }
- p2 = p + 1;
-
- s2 = talloc_strndup(mem_ctx, *s, p - *s);
- if (!s2) {
- errno = ENOMEM;
- return NULL;
- }
-
- ret = ldap_parse_filtercomp(mem_ctx, s2);
-
- *s = p2;
-
- return ret;
-}
-
-/*
- main parser entry point. Takes a search string and returns a parse tree
-
- expression ::= <simple> | <filter>
-*/
-static struct ldap_parse_tree *ldap_parse_tree(TALLOC_CTX *mem_ctx, const char *s)
-{
- while (isspace(*s)) s++;
-
- if (*s == '(') {
- return ldap_parse_filter(mem_ctx, &s);
- }
-
- return ldap_parse_simple(mem_ctx, s);
-}
-
-static BOOL ldap_push_filter(struct asn1_data *data, struct ldap_parse_tree *tree)
+static BOOL ldap_push_filter(struct asn1_data *data, struct ldb_parse_tree *tree)
{
switch (tree->operation) {
- case LDAP_OP_SIMPLE: {
+ case LDB_OP_SIMPLE: {
if ((tree->u.simple.value.length == 1) &&
(((char *)(tree->u.simple.value.data))[0] == '*')) {
/* Just a presence test */
@@ -392,7 +53,7 @@ static BOOL ldap_push_filter(struct asn1_data *data, struct ldap_parse_tree *tre
break;
}
- case LDAP_OP_AND: {
+ case LDB_OP_AND: {
int i;
asn1_push_tag(data, 0xa0);
@@ -403,7 +64,7 @@ static BOOL ldap_push_filter(struct asn1_data *data, struct ldap_parse_tree *tre
break;
}
- case LDAP_OP_OR: {
+ case LDB_OP_OR: {
int i;
asn1_push_tag(data, 0xa1);
@@ -481,9 +142,7 @@ BOOL ldap_encode(struct ldap_message *msg, DATA_BLOB *result)
struct ldap_BindResponse *r = &msg->r.BindResponse;
asn1_push_tag(&data, ASN1_APPLICATION(msg->type));
ldap_encode_response(&data, &r->response);
- if (r->SASL.secblob.length > 0) {
- asn1_write_ContextSimple(&data, 7, &r->SASL.secblob);
- }
+ asn1_write_ContextSimple(&data, 7, &r->SASL.secblob);
asn1_pop_tag(&data);
break;
}
@@ -493,6 +152,7 @@ BOOL ldap_encode(struct ldap_message *msg, DATA_BLOB *result)
}
case LDAP_TAG_SearchRequest: {
struct ldap_SearchRequest *r = &msg->r.SearchRequest;
+ struct ldb_parse_tree *tree;
asn1_push_tag(&data, ASN1_APPLICATION(msg->type));
asn1_write_OctetString(&data, r->basedn, strlen(r->basedn));
asn1_write_enumerated(&data, r->scope);
@@ -501,22 +161,14 @@ BOOL ldap_encode(struct ldap_message *msg, DATA_BLOB *result)
asn1_write_Integer(&data, r->timelimit);
asn1_write_BOOLEAN(&data, r->attributesonly);
- {
- TALLOC_CTX *mem_ctx = talloc_init("ldap_parse_tree");
- struct ldap_parse_tree *tree;
-
- if (mem_ctx == NULL)
- return False;
+ tree = ldb_parse_tree(NULL, r->filter);
- tree = ldap_parse_tree(mem_ctx, r->filter);
-
- if (tree == NULL)
- return False;
+ if (tree == NULL)
+ return False;
- ldap_push_filter(&data, tree);
+ ldap_push_filter(&data, tree);
- talloc_free(mem_ctx);
- }
+ talloc_free(tree);
asn1_push_tag(&data, ASN1_SEQUENCE(0));
for (i=0; i<r->num_attributes; i++) {
@@ -830,6 +482,8 @@ static BOOL ldap_decode_filter(TALLOC_CTX *mem_ctx, struct asn1_data *data,
/* equalityMatch */
const char *attrib;
DATA_BLOB value;
+ struct ldb_val val;
+
if (tag_desc != 0xa0) /* context compound */
return False;
asn1_start_tag(data, ASN1_CONTEXT(3));
@@ -838,8 +492,10 @@ static BOOL ldap_decode_filter(TALLOC_CTX *mem_ctx, struct asn1_data *data,
asn1_end_tag(data);
if ((data->has_error) || (attrib == NULL) || (value.data == NULL))
return False;
+ val.data = value.data;
+ val.length = value.length;
filter = talloc_asprintf(mem_ctx, "(%s=%s)",
- attrib, ldap_binary_encode(mem_ctx, value));
+ attrib, ldb_binary_encode(mem_ctx, val));
data_blob_free(&value);
break;
}
@@ -881,7 +537,7 @@ static void ldap_decode_attrib(TALLOC_CTX *mem_ctx, struct asn1_data *data,
asn1_start_tag(data, ASN1_SET);
while (asn1_peek_tag(data, ASN1_OCTET_STRING)) {
DATA_BLOB blob;
- struct ldap_val value;
+ struct ldb_val value;
asn1_read_OctetString(data, &blob);
value.data = blob.data;
value.length = blob.length;
@@ -1334,17 +990,3 @@ BOOL ldap_parse_basic_url(TALLOC_CTX *mem_ctx, const char *url,
return (*host != NULL);
}
-
-
-/*
- externally callable version of filter string parsing - used in the
- cldap server
-*/
-struct ldap_parse_tree *ldap_parse_filter_string(TALLOC_CTX *mem_ctx,
- const char *s)
-{
- return ldap_parse_filter(mem_ctx, &s);
-}
-
-
-
diff --git a/source4/libcli/ldap/ldap.h b/source4/libcli/ldap/ldap.h
index 54a96d9672..12d30a2610 100644
--- a/source4/libcli/ldap/ldap.h
+++ b/source4/libcli/ldap/ldap.h
@@ -22,6 +22,9 @@
#ifndef _SMB_LDAP_H
#define _SMB_LDAP_H
+#include "lib/ldb/include/ldb.h"
+#include "lib/ldb/include/ldb_parse.h"
+
enum ldap_request_tag {
LDAP_TAG_BindRequest = 0,
LDAP_TAG_BindResponse = 1,
@@ -288,33 +291,6 @@ struct ldap_connection {
struct gensec_security *gensec;
};
-/* Hmm. A blob might be more appropriate here :-) */
-
-struct ldap_val {
- unsigned int length;
- void *data;
-};
-
-enum ldap_parse_op {LDAP_OP_SIMPLE, LDAP_OP_AND, LDAP_OP_OR, LDAP_OP_NOT};
-
-struct ldap_parse_tree {
- enum ldap_parse_op operation;
- union {
- struct {
- char *attr;
- struct ldap_val value;
- } simple;
- struct {
- unsigned int num_elements;
- struct ldap_parse_tree **elements;
- } list;
- struct {
- struct ldap_parse_tree *child;
- } not;
- } u;
-};
-
-#define LDAP_ALL_SEP "()&|=!"
#define LDAP_CONNECTION_TIMEOUT 10000
/* The following definitions come from libcli/ldap/ldap.c */
@@ -323,10 +299,6 @@ BOOL ldap_encode(struct ldap_message *msg, DATA_BLOB *result);
BOOL ldap_decode(struct asn1_data *data, struct ldap_message *msg);
BOOL ldap_parse_basic_url(TALLOC_CTX *mem_ctx, const char *url,
char **host, uint16_t *port, BOOL *ldaps);
-struct ldap_parse_tree *ldap_parse_filter_string(TALLOC_CTX *mem_ctx,
- const char *s);
-const char *ldap_binary_encode(TALLOC_CTX *mem_ctx, DATA_BLOB blob);
-struct ldap_val ldap_binary_decode(TALLOC_CTX *mem_ctx, const char *str);
/* The following definitions come from libcli/ldap/ldap_client.c */
@@ -368,7 +340,7 @@ NTSTATUS ldap2nterror(int ldaperror);
/* The following definitions come from libcli/ldap/ldap_ldif.c */
-BOOL add_value_to_attrib(TALLOC_CTX *mem_ctx, struct ldap_val *value,
+BOOL add_value_to_attrib(TALLOC_CTX *mem_ctx, struct ldb_val *value,
struct ldap_attribute *attrib);
BOOL add_attrib_to_array_talloc(TALLOC_CTX *mem_ctx,
const struct ldap_attribute *attrib,
@@ -385,6 +357,6 @@ struct ldap_message *ldap_ldif2msg(TALLOC_CTX *mem_ctx, const char *s);
const char *ldap_encode_ndr_uint32(TALLOC_CTX *mem_ctx, uint32_t value);
const char *ldap_encode_ndr_dom_sid(TALLOC_CTX *mem_ctx, struct dom_sid *sid);
const char *ldap_encode_ndr_GUID(TALLOC_CTX *mem_ctx, struct GUID *guid);
-NTSTATUS ldap_decode_ndr_GUID(TALLOC_CTX *mem_ctx, struct ldap_val val, struct GUID *guid);
+NTSTATUS ldap_decode_ndr_GUID(TALLOC_CTX *mem_ctx, struct ldb_val val, struct GUID *guid);
#endif
diff --git a/source4/libcli/ldap/ldap_ldif.c b/source4/libcli/ldap/ldap_ldif.c
index c36106e116..2489a97748 100644
--- a/source4/libcli/ldap/ldap_ldif.c
+++ b/source4/libcli/ldap/ldap_ldif.c
@@ -104,7 +104,7 @@ static char *next_chunk(TALLOC_CTX *mem_ctx,
}
/* simple ldif attribute parser */
-static int next_attr(char **s, const char **attr, struct ldap_val *value)
+static int next_attr(char **s, const char **attr, struct ldb_val *value)
{
char *p;
int base64_encoded = 0;
@@ -157,7 +157,7 @@ static int next_attr(char **s, const char **attr, struct ldap_val *value)
return 0;
}
-BOOL add_value_to_attrib(TALLOC_CTX *mem_ctx, struct ldap_val *value,
+BOOL add_value_to_attrib(TALLOC_CTX *mem_ctx, struct ldb_val *value,
struct ldap_attribute *attrib)
{
attrib->values = talloc_realloc(mem_ctx,
@@ -195,7 +195,7 @@ static BOOL fill_add_attributes(struct ldap_message *msg, char **chunk)
{
struct ldap_AddRequest *r = &msg->r.AddRequest;
const char *attr_name;
- struct ldap_val value;
+ struct ldb_val value;
r->num_attributes = 0;
r->attributes = NULL;
@@ -251,7 +251,7 @@ static BOOL fill_mods(struct ldap_message *msg, char **chunk)
{
struct ldap_ModifyRequest *r = &msg->r.ModifyRequest;
const char *attr_name;
- struct ldap_val value;
+ struct ldb_val value;
r->num_mods = 0;
r->mods = NULL;
@@ -309,7 +309,7 @@ static BOOL fill_modrdn(struct ldap_message *msg, char **chunk)
{
struct ldap_ModifyDNRequest *r = &msg->r.ModifyDNRequest;
const char *attr_name;
- struct ldap_val value;
+ struct ldb_val value;
r->newrdn = NULL;
r->deleteolddn = False;
@@ -362,7 +362,7 @@ static struct ldap_message *ldif_read(TALLOC_CTX *mem_ctx, int (*fgetc_fn)(void
const char *attr=NULL;
const char *dn;
char *chunk=NULL, *s;
- struct ldap_val value;
+ struct ldb_val value;
value.data = NULL;
diff --git a/source4/libcli/ldap/ldap_ndr.c b/source4/libcli/ldap/ldap_ndr.c
index 2db85d8f09..720022c6c2 100644
--- a/source4/libcli/ldap/ldap_ndr.c
+++ b/source4/libcli/ldap/ldap_ndr.c
@@ -25,17 +25,25 @@
#include "libcli/ldap/ldap.h"
#include "librpc/gen_ndr/ndr_security.h"
+struct ldb_val ldb_blob(DATA_BLOB blob)
+{
+ struct ldb_val val;
+ val.data = blob.data;
+ val.length = blob.length;
+ return val;
+}
+
/*
encode a NDR uint32 as a ldap filter element
*/
const char *ldap_encode_ndr_uint32(TALLOC_CTX *mem_ctx, uint32_t value)
{
uint8_t buf[4];
- DATA_BLOB blob;
+ struct ldb_val val;
SIVAL(buf, 0, value);
- blob.data = buf;
- blob.length = 4;
- return ldap_binary_encode(mem_ctx, blob);
+ val.data = buf;
+ val.length = 4;
+ return ldb_binary_encode(mem_ctx, val);
}
/*
@@ -51,7 +59,7 @@ const char *ldap_encode_ndr_dom_sid(TALLOC_CTX *mem_ctx, struct dom_sid *sid)
if (!NT_STATUS_IS_OK(status)) {
return NULL;
}
- ret = ldap_binary_encode(mem_ctx, blob);
+ ret = ldb_binary_encode(mem_ctx, ldb_blob(blob));
data_blob_free(&blob);
return ret;
}
@@ -70,7 +78,7 @@ const char *ldap_encode_ndr_GUID(TALLOC_CTX *mem_ctx, struct GUID *guid)
if (!NT_STATUS_IS_OK(status)) {
return NULL;
}
- ret = ldap_binary_encode(mem_ctx, blob);
+ ret = ldb_binary_encode(mem_ctx, ldb_blob(blob));
data_blob_free(&blob);
return ret;
}
@@ -78,7 +86,7 @@ const char *ldap_encode_ndr_GUID(TALLOC_CTX *mem_ctx, struct GUID *guid)
/*
decode a NDR GUID from a ldap filter element
*/
-NTSTATUS ldap_decode_ndr_GUID(TALLOC_CTX *mem_ctx, struct ldap_val val, struct GUID *guid)
+NTSTATUS ldap_decode_ndr_GUID(TALLOC_CTX *mem_ctx, struct ldb_val val, struct GUID *guid)
{
DATA_BLOB blob;
NTSTATUS status;