fuzz: ldb binary decode/enode

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>

diff --git a/lib/fuzzing/fuzz_ldb_parse_binary_decode.c b/lib/fuzzing/fuzz_ldb_parse_binary_decode.c
new file mode 100644 (file)
index 0000000..6b79a34
--- /dev/null
+++ b/lib/fuzzing/fuzz_ldb_parse_binary_decode.c
@@ -0,0 +1,49 @@
+/*
+   Fuzzing ldb_parse_control_from_string
+   Copyright (C) Catalyst IT 2020
+
+   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 "fuzzing/fuzzing.h"
+#include "ldb_private.h"
+
+
+#define MAX_LENGTH (2 * 1024 * 1024 - 1)
+char buf[MAX_LENGTH + 1] = {0};
+
+static char * possibly_truncate(uint8_t *input, size_t len)
+{
+       if (len > MAX_LENGTH) {
+               len = MAX_LENGTH;
+       }
+       memcpy(buf, input, len);
+       buf[len] = 0;
+       return buf;
+}
+
+
+int LLVMFuzzerTestOneInput(uint8_t *input, size_t len)
+{
+       TALLOC_CTX *mem_ctx = talloc_init(__FUNCTION__);
+       struct ldb_val val = {0};
+       const char *s = possibly_truncate(input, len);
+
+       /* we treat the same string to encoding and decoding, not
+        * round-tripping. */
+       val = ldb_binary_decode(mem_ctx, s);
+       ldb_binary_encode_string(mem_ctx, s);
+       TALLOC_FREE(mem_ctx);
+       return 0;
+}

diff --git a/lib/fuzzing/wscript_build b/lib/fuzzing/wscript_build
index b5d699e4dcdc3e2c753613714742996aebdbeaa3..68a1f5ca2346cfbd37fc0efde604981f9c2376a2 100644 (file)
--- a/lib/fuzzing/wscript_build
+++ b/lib/fuzzing/wscript_build
@@ -57,6 +57,11 @@ bld.SAMBA_BINARY('fuzz_ldb_ldif_read',
                  deps='fuzzing ldb afl-fuzz-main',
                  fuzzer=True)
 
+bld.SAMBA_BINARY('fuzz_ldb_parse_binary_decode',
+                 source='fuzz_ldb_parse_binary_decode.c',
+                 deps='fuzzing ldb afl-fuzz-main',
+                 fuzzer=True)
+
 bld.SAMBA_BINARY('fuzz_ldb_parse_tree',
                  source='fuzz_ldb_parse_tree.c',
                  deps='fuzzing ldb afl-fuzz-main',