1 files changed, 68 insertions, 0 deletions
diff --git a/lib/fuzzing/fuzz_lzxpress_huffman_round_trip.c b/lib/fuzzing/fuzz_lzxpress_huffman_round_trip.c
new file mode 100644
index 0000000..adb8fbf
--- /dev/null
+++ b/lib/fuzzing/fuzz_lzxpress_huffman_round_trip.c
@@ -0,0 +1,68 @@
+/*
+   Fuzzing for lzxpress_huffman{_decompress,_compress} round trip
+   Copyright (C) Michael Hanselmann 2019
+   Copyright (C) Douglas Bagnall 2022 <dbagnall@samba.org>
+
+   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 "compression/lzxpress_huffman.h"
+
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	return 0;
+}
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
+{
+        /*
+	 * we allow compressed to be 25% bigger than decompressed.
+	 */
+	static uint8_t compressed[1024 * (1024 + 256)];
+	static uint8_t decompressed[1024 * 1024];
+	ssize_t compressed_size;
+	ssize_t decompressed_size;
+	struct lzxhuff_compressor_mem cmp;
+
+	if (len > sizeof(decompressed) || len == 0) {
+		return 0;
+	}
+
+	compressed_size = lzxpress_huffman_compress(&cmp,
+						    buf,
+						    len,
+						    compressed,
+						    sizeof(compressed));
+	if (compressed_size < 0) {
+		abort();
+	}
+
+	decompressed_size = lzxpress_huffman_decompress(compressed,
+							compressed_size,
+							decompressed,
+							len);
+
+	if (decompressed_size != len) {
+		abort();
+	}
+	if (memcmp(buf, decompressed, len) != 0) {
+		abort();
+	}
+
+	return 0;
+}