1 /* 2 Fuzzing for ldap_decode. 3 Copyright (C) Michael Hanselmann 2019 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include "includes.h" 20 #include "fuzzing/fuzzing.h" 21 #include "lib/util/asn1.h" 22 #include "libcli/ldap/ldap_message.h" 23 #include "libcli/ldap/ldap_proto.h" 24 25 int LLVMFuzzerInitialize(int *argc, char ***argv) 26 { 27 return 0; 28 } 29 30 int LLVMFuzzerTestOneInput(uint8_t *buf, size_t len) 31 { 32 TALLOC_CTX *mem_ctx = talloc_init(__FUNCTION__); 33 struct asn1_data *asn1; 34 struct ldap_message *ldap_msg; 35 struct ldap_request_limits limits = { 36 /* 37 * The default size is currently 256000 bytes 38 */ 39 .max_search_size = 256000 40 }; 41 NTSTATUS status; 42 43 /* 44 * Need to limit the max parse tree depth to 250 to prevent 45 * ASAN detecting stack overflows. 46 */ 47 asn1 = asn1_init(mem_ctx, 250); 48 if (!asn1) { 49 goto out; 50 } 51 52 asn1_load_nocopy(asn1, buf, len); 53 54 ldap_msg = talloc(mem_ctx, struct ldap_message); 55 if (!ldap_msg) { 56 goto out; 57 } 58 59 status = ldap_decode( 60 asn1, &limits, samba_ldap_control_handlers(), ldap_msg); 61 62 out: 63 talloc_free(mem_ctx); 64 65 return 0; 66 } 67