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CVE-2023-0614 s4-dsdb: Add samdb_result_dom_sid_buf()

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This function parses a SID from an ldb_message, similar to
samdb_result_dom_sid(), but does it without allocating anything.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15270

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

[abartlet@samba.org Adapted for simple conflicts due to
 56297449f9 trimming
 trailing whitespace]
This commit is contained in:
Joseph Sutton 2023-02-27 12:19:08 +13:00 committed by Jule Anger
parent 95be170f99
commit e46739cb89
1 changed files with 21 additions and 1 deletions
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20
source4/dsdb/common/util.c
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@ -365,6 +365,26 @@ struct dom_sid *samdb_result_dom_sid(TALLOC_CTX *mem_ctx, const struct ldb_messa
return sid;
}
/*
pull a dom_sid structure from a objectSid in a result set.
*/
int samdb_result_dom_sid_buf(const struct ldb_message *msg,
const char *attr,
struct dom_sid *sid)
{
ssize_t ret;
const struct ldb_val *v = NULL;
v = ldb_msg_find_ldb_val(msg, attr);
if (v == NULL) {
return LDB_ERR_NO_SUCH_ATTRIBUTE;
}
ret = sid_parse(v->data, v->length, sid);
if (ret == -1) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
/*
pull a guid structure from a objectGUID in a result set.
*/