fuzz: add fuzzer for sess_crypt_blob

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/lib/fuzzing/fuzz_sess_crypt_blob.c b/lib/fuzzing/fuzz_sess_crypt_blob.c
new file mode 100644 (file)
index 0000000..bed697e
--- /dev/null
+++ b/lib/fuzzing/fuzz_sess_crypt_blob.c
@@ -0,0 +1,55 @@
+/*
+   Fuzzing sess_*crypt_blob
+   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 "libcli/auth/libcli_auth.h"
+#include "session.h"
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+       return 0;
+}
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *input, size_t len)
+{
+       TALLOC_CTX *mem_ctx = NULL;
+       DATA_BLOB blob, session_key, out;
+       size_t slen;
+       if (len < 1) {
+               return 0;
+       }
+
+       slen = input[0];
+       if (len < slen + 1) {
+               return 0;
+       }
+
+       session_key.data = input + 1;
+       session_key.length = slen;
+       blob.data = input + 1 + slen;
+       blob.length = len - slen - 1;
+
+       mem_ctx = talloc_new(NULL);
+
+       out = sess_encrypt_blob(mem_ctx, &blob, &session_key);
+       sess_decrypt_blob(mem_ctx, &blob, &session_key, &out);
+
+       TALLOC_FREE(mem_ctx);
+       return 0;
+}

diff --git a/lib/fuzzing/wscript_build b/lib/fuzzing/wscript_build
index 05dbc00f2671a9df6a03230e518e589caba4e1d4..0f25b0c29cd875b69c3ebe9593506a4b9e04ee7d 100644 (file)
--- a/lib/fuzzing/wscript_build
+++ b/lib/fuzzing/wscript_build
@@ -37,6 +37,11 @@ bld.SAMBA_BINARY('fuzz_sddl_parse',
                  deps='fuzzing samba-security  afl-fuzz-main',
                  fuzzer=True)
 
+bld.SAMBA_BINARY('fuzz_sess_crypt_blob',
+                 source='fuzz_sess_crypt_blob.c',
+                 deps='fuzzing samba-security LIBCLI_AUTH NDR_DSSETUP  afl-fuzz-main',
+                 fuzzer=True)
+
 bld.SAMBA_BINARY('fuzz_nmblib_parse_packet',
                  source='fuzz_nmblib_parse_packet.c',
                  deps='fuzzing libsmb afl-fuzz-main',