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-rw-r--r--source4/dsdb/common/dsdb_dn.c324
-rw-r--r--source4/dsdb/common/dsdb_dn.h16
2 files changed, 340 insertions, 0 deletions
diff --git a/source4/dsdb/common/dsdb_dn.c b/source4/dsdb/common/dsdb_dn.c
new file mode 100644
index 0000000000..3605a6a056
--- /dev/null
+++ b/source4/dsdb/common/dsdb_dn.c
@@ -0,0 +1,324 @@
+/*
+ Unix SMB/CIFS implementation.
+ Samba utility functions
+
+ Copyright (C) Andrew Tridgell 2009
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
+
+ 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 "includes.h"
+#include "dsdb/samdb/samdb.h"
+#include "lib/ldb/include/ldb_module.h"
+
+enum dsdb_dn_format dsdb_dn_oid_to_format(const char *oid)
+{
+ if (strcmp(oid, LDB_SYNTAX_DN) == 0) {
+ return DSDB_NORMAL_DN;
+ } else if (strcmp(oid, DSDB_SYNTAX_BINARY_DN) == 0) {
+ return DSDB_BINARY_DN;
+ } else if (strcmp(oid, DSDB_SYNTAX_STRING_DN) == 0) {
+ return DSDB_STRING_DN;
+ } else {
+ return DSDB_INVALID_DN;
+ }
+}
+
+static struct dsdb_dn *dsdb_dn_construct_internal(TALLOC_CTX *mem_ctx,
+ struct ldb_dn *dn,
+ DATA_BLOB extra_part,
+ enum dsdb_dn_format dn_format,
+ const char *oid)
+{
+ struct dsdb_dn *dsdb_dn = talloc(mem_ctx, struct dsdb_dn);
+ if (!dsdb_dn) {
+ return NULL;
+ }
+ dsdb_dn->dn = talloc_steal(dsdb_dn, dn);
+ dsdb_dn->extra_part = extra_part;
+ dsdb_dn->dn_format = dn_format;
+ /* Look to see if this attributeSyntax is a DN */
+ if (dsdb_dn->dn_format == DSDB_INVALID_DN) {
+ talloc_free(dsdb_dn);
+ return NULL;
+ }
+
+ dsdb_dn->oid = oid;
+ talloc_steal(dsdb_dn, extra_part.data);
+ return dsdb_dn;
+}
+
+struct dsdb_dn *dsdb_dn_construct(TALLOC_CTX *mem_ctx, struct ldb_dn *dn, DATA_BLOB extra_part,
+ const char *oid)
+{
+ return dsdb_dn_construct_internal(mem_ctx, dn, extra_part, dsdb_dn_oid_to_format(oid), oid);
+}
+
+struct dsdb_dn *dsdb_dn_parse(TALLOC_CTX *mem_ctx, struct ldb_context *ldb,
+ const struct ldb_val *dn_blob, const char *dn_oid)
+{
+ struct dsdb_dn *dsdb_dn;
+ struct ldb_dn *dn;
+ const char *data;
+ size_t len;
+ TALLOC_CTX *tmp_ctx;
+ char *p1;
+ char *p2;
+ uint32_t blen;
+ struct ldb_val bval;
+ struct ldb_val dval;
+ char *dn_str;
+
+ enum dsdb_dn_format dn_format = dsdb_dn_oid_to_format(dn_oid);
+ switch (dn_format) {
+ case DSDB_INVALID_DN:
+ return NULL;
+ case DSDB_NORMAL_DN:
+ {
+ dn = ldb_dn_from_ldb_val(mem_ctx, ldb, dn_blob);
+ if (!dn || !ldb_dn_validate(dn)) {
+ talloc_free(dn);
+ return NULL;
+ }
+ return dsdb_dn_construct_internal(mem_ctx, dn, data_blob_null, dn_format, dn_oid);
+ }
+ case DSDB_BINARY_DN:
+ if (dn_blob->length < 2 || dn_blob->data[0] != 'B' || dn_blob->data[1] != ':') {
+ return NULL;
+ }
+ break;
+ case DSDB_STRING_DN:
+ if (dn_blob->length < 2 || dn_blob->data[0] != 'S' || dn_blob->data[1] != ':') {
+ return NULL;
+ }
+ break;
+ default:
+ return NULL;
+ }
+
+ if (dn_blob && dn_blob->data
+ && (strlen((const char*)dn_blob->data) != dn_blob->length)) {
+ /* The RDN must not contain a character with value 0x0 */
+ return NULL;
+ }
+
+ if (!dn_blob->data || dn_blob->length == 0) {
+ return NULL;
+ }
+
+ tmp_ctx = talloc_new(mem_ctx);
+ if (tmp_ctx == NULL) {
+ return NULL;
+ }
+
+ data = (const char *)dn_blob->data;
+
+ len = dn_blob->length - 2;
+ p1 = talloc_strndup(tmp_ctx, (const char *)dn_blob->data + 2, len);
+ if (!p1) {
+ goto failed;
+ }
+
+ errno = 0;
+ blen = strtoul(p1, &p2, 10);
+ if (errno != 0) {
+ DEBUG(10, (__location__ ": failed\n"));
+ goto failed;
+ }
+ if (p2 == NULL) {
+ DEBUG(10, (__location__ ": failed\n"));
+ goto failed;
+ }
+ if (p2[0] != ':') {
+ DEBUG(10, (__location__ ": failed\n"));
+ goto failed;
+ }
+ len -= PTR_DIFF(p2,p1);//???
+ p1 = p2+1;
+ len--;
+
+ if ((blen % 2 != 0)) {
+ DEBUG(10, (__location__ ": blen=%u - not an even number\n", (unsigned)blen));
+ goto failed;
+ }
+
+ if (blen >= len) {
+ DEBUG(10, (__location__ ": blen=%u len=%u\n", (unsigned)blen, (unsigned)len));
+ goto failed;
+ }
+
+ p2 = p1 + blen;
+ if (p2[0] != ':') {
+ DEBUG(10, (__location__ ": %s", p2));
+ goto failed;
+ }
+ dn_str = p2+1;
+
+
+ switch (dn_format) {
+ case DSDB_BINARY_DN:
+ if (blen >= 2) {
+ bval.length = (blen/2)+1;
+ bval.data = talloc_size(tmp_ctx, bval.length);
+ if (bval.data == NULL) {
+ DEBUG(10, (__location__ ": err\n"));
+ goto failed;
+ }
+ bval.data[bval.length-1] = 0;
+
+ bval.length = strhex_to_str((char *)bval.data, bval.length,
+ p1, blen);
+ if (bval.length != (blen / 2)) {
+ DEBUG(10, (__location__ ": non hexidecimal characters found in binary prefix\n"));
+ goto failed;
+ }
+ } else {
+ bval = data_blob_null;
+ }
+
+ break;
+ case DSDB_STRING_DN:
+ bval = data_blob(p1, blen);
+ break;
+ default:
+ /* never reached */
+ return NULL;
+ }
+
+
+ dval.data = (uint8_t *)dn_str;
+ dval.length = strlen(dn_str);
+
+ dn = ldb_dn_from_ldb_val(tmp_ctx, ldb, &dval);
+ if (!dn || !ldb_dn_validate(dn)) {
+ DEBUG(10, (__location__ ": err\n"));
+ goto failed;
+ }
+
+ dsdb_dn = dsdb_dn_construct(mem_ctx, dn, bval, dn_oid);
+
+ return dsdb_dn;
+
+failed:
+ talloc_free(tmp_ctx);
+ return NULL;
+}
+
+
+static char *dsdb_dn_get_with_postfix(TALLOC_CTX *mem_ctx,
+ struct dsdb_dn *dsdb_dn,
+ const char *postfix)
+{
+ if (!postfix) {
+ return NULL;
+ }
+
+ switch (dsdb_dn->dn_format) {
+ case DSDB_NORMAL_DN:
+ {
+ return talloc_strdup(mem_ctx, postfix);
+ }
+ case DSDB_BINARY_DN:
+ {
+ char *hexstr = data_blob_hex_string_upper(mem_ctx, &dsdb_dn->extra_part);
+
+ char *p = talloc_asprintf(mem_ctx, "B:%u:%s:%s", (unsigned)(dsdb_dn->extra_part.length*2), hexstr,
+ postfix);
+ talloc_free(hexstr);
+ return p;
+ }
+ case DSDB_STRING_DN:
+ {
+ return talloc_asprintf(mem_ctx, "S:%u:%*.*s:%s",
+ (unsigned)(dsdb_dn->extra_part.length),
+ (int)(dsdb_dn->extra_part.length),
+ (int)(dsdb_dn->extra_part.length),
+ (const char *)dsdb_dn->extra_part.data,
+ postfix);
+ }
+ default:
+ return NULL;
+ }
+}
+
+char *dsdb_dn_get_linearized(TALLOC_CTX *mem_ctx,
+ struct dsdb_dn *dsdb_dn)
+{
+ const char *postfix = ldb_dn_get_linearized(dsdb_dn->dn);
+ return dsdb_dn_get_with_postfix(mem_ctx, dsdb_dn, postfix);
+}
+
+char *dsdb_dn_get_casefold(TALLOC_CTX *mem_ctx,
+ struct dsdb_dn *dsdb_dn)
+{
+ const char *postfix = ldb_dn_get_casefold(dsdb_dn->dn);
+ return dsdb_dn_get_with_postfix(mem_ctx, dsdb_dn, postfix);
+}
+
+char *dsdb_dn_get_extended_linearized(TALLOC_CTX *mem_ctx,
+ struct dsdb_dn *dsdb_dn,
+ int mode)
+{
+ char *postfix = ldb_dn_get_extended_linearized(mem_ctx, dsdb_dn->dn, mode);
+ char *ret = dsdb_dn_get_with_postfix(mem_ctx, dsdb_dn, postfix);
+ talloc_free(postfix);
+ return ret;
+}
+
+int dsdb_dn_binary_canonicalise(struct ldb_context *ldb, void *mem_ctx,
+ const struct ldb_val *in, struct ldb_val *out)
+{
+ struct dsdb_dn *dsdb_dn = dsdb_dn_parse(mem_ctx, ldb, in, DSDB_SYNTAX_BINARY_DN);
+
+ if (!dsdb_dn) {
+ return -1;
+ }
+ *out = data_blob_string_const(dsdb_dn_get_casefold(mem_ctx, dsdb_dn));
+ talloc_free(dsdb_dn);
+ if (!out->data) {
+ return -1;
+ }
+ return 0;
+}
+
+int dsdb_dn_binary_comparison(struct ldb_context *ldb, void *mem_ctx,
+ const struct ldb_val *v1,
+ const struct ldb_val *v2)
+{
+ return ldb_any_comparison(ldb, mem_ctx, dsdb_dn_binary_canonicalise, v1, v2);
+}
+
+int dsdb_dn_string_canonicalise(struct ldb_context *ldb, void *mem_ctx,
+ const struct ldb_val *in, struct ldb_val *out)
+{
+ struct dsdb_dn *dsdb_dn = dsdb_dn_parse(mem_ctx, ldb, in, DSDB_SYNTAX_STRING_DN);
+
+ if (!dsdb_dn) {
+ return -1;
+ }
+ *out = data_blob_string_const(dsdb_dn_get_casefold(mem_ctx, dsdb_dn));
+ talloc_free(dsdb_dn);
+ if (!out->data) {
+ return -1;
+ }
+ return 0;
+}
+
+int dsdb_dn_string_comparison(struct ldb_context *ldb, void *mem_ctx,
+ const struct ldb_val *v1,
+ const struct ldb_val *v2)
+{
+ return ldb_any_comparison(ldb, mem_ctx, dsdb_dn_string_canonicalise, v1, v2);
+}
diff --git a/source4/dsdb/common/dsdb_dn.h b/source4/dsdb/common/dsdb_dn.h
new file mode 100644
index 0000000000..55b5c0bd40
--- /dev/null
+++ b/source4/dsdb/common/dsdb_dn.h
@@ -0,0 +1,16 @@
+enum dsdb_dn_format {
+ DSDB_NORMAL_DN,
+ DSDB_BINARY_DN,
+ DSDB_STRING_DN,
+ DSDB_INVALID_DN
+};
+
+struct dsdb_dn {
+ struct ldb_dn *dn;
+ DATA_BLOB extra_part;
+ enum dsdb_dn_format dn_format;
+ const char *oid;
+};
+
+#define DSDB_SYNTAX_BINARY_DN "1.2.840.113556.1.4.903"
+#define DSDB_SYNTAX_STRING_DN "1.2.840.113556.1.4.904"
generated by cgit (git 2.34.1) at 2024-11-02 23:55:48 +0000