From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Fri, 11 Sep 2020 12:02:57 +0000 (+0300)
Subject: lib-mail: Add fuzz-message-parser
X-Git-Tag: 2.3.14.rc1~177
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec11aedaefd6dd6fde7a51ec54a37396013fc742;p=thirdparty%2Fdovecot%2Fcore.git

lib-mail: Add fuzz-message-parser

Fuzzer for message parser
---

diff --git a/src/lib-mail/Makefile.am b/src/lib-mail/Makefile.am
index f260694f18..67bb1cc15a 100644
--- a/src/lib-mail/Makefile.am
+++ b/src/lib-mail/Makefile.am
@@ -115,7 +115,22 @@ test_programs = \
 	test-rfc2231-parser \
 	test-rfc822-parser
 
-noinst_PROGRAMS = $(test_programs)
+fuzz_programs =
+
+if USE_FUZZER
+fuzz_programs += fuzz-message-parser
+
+nodist_EXTRA_fuzz_message_parser_SOURCES = force-cxx-linking.cxx
+
+fuzz_message_parser_CPPFLAGS = $(FUZZER_CPPFLAGS)
+fuzz_message_parser_LDFLAGS = $(FUZZER_LDFLAGS)
+fuzz_message_parser_SOURCES = fuzz-message-parser.c
+fuzz_message_parser_LDADD = $(test_libs)
+fuzz_message_parser_DEPENDENCIES = $(test_deps)
+
+endif
+
+noinst_PROGRAMS = $(fuzz_programs) $(test_programs)
 
 test_libs = \
 	$(noinst_LTLIBRARIES) \
diff --git a/src/lib-mail/fuzz-message-parser.c b/src/lib-mail/fuzz-message-parser.c
new file mode 100644
index 0000000000..1cb4bdca02
--- /dev/null
+++ b/src/lib-mail/fuzz-message-parser.c
@@ -0,0 +1,28 @@
+/* Copyright (c) 2020 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "istream.h"
+#include "test-common.h"
+#include "test-common.h"
+#include "fuzzer.h"
+#include "message-parser.h"
+
+FUZZ_BEGIN_DATA(const unsigned char *data, size_t size)
+{
+	struct istream *input = test_istream_create_data(data, size);
+	const struct message_parser_settings set = {
+		.hdr_flags = 0,
+		.flags = MESSAGE_PARSER_FLAG_INCLUDE_MULTIPART_BLOCKS,
+		.max_nested_mime_parts = 0,
+		.max_total_mime_parts = 0,
+	};
+	struct message_parser_ctx *ctx =
+			message_parser_init(pool_datastack_create(), input, &set);
+	struct message_block block ATTR_UNUSED;
+	i_zero(&block);
+	while(message_parser_parse_next_block(ctx, &block) > -1);
+	struct message_part *part ATTR_UNUSED;
+	message_parser_deinit(&ctx, &part);
+	i_stream_unref(&input);
+}
+FUZZ_END