From 0ae344d002755d1f218fe4fbd818a814bc3ebdbc Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Sun, 23 Jun 2019 14:31:35 -0400
Subject: Add fuzzers to exercise specific pipeline classes

---
 fuzz/pngpredictor_fuzzer.cc | 52 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 fuzz/pngpredictor_fuzzer.cc

(limited to 'fuzz/pngpredictor_fuzzer.cc')

diff --git a/fuzz/pngpredictor_fuzzer.cc b/fuzz/pngpredictor_fuzzer.cc
new file mode 100644
index 00000000..8a8c5d7d
--- /dev/null
+++ b/fuzz/pngpredictor_fuzzer.cc
@@ -0,0 +1,52 @@
+#include <qpdf/Pl_Discard.hh>
+#include <qpdf/Pl_PNGFilter.hh>
+#include <iostream>
+#include <stdexcept>
+
+class FuzzHelper
+{
+  public:
+    FuzzHelper(unsigned char const* data, size_t size);
+    void run();
+
+  private:
+    void doChecks();
+
+    unsigned char const* data;
+    size_t size;
+};
+
+FuzzHelper::FuzzHelper(unsigned char const* data, size_t size) :
+    data(data),
+    size(size)
+{
+}
+
+void
+FuzzHelper::doChecks()
+{
+    Pl_Discard discard;
+    Pl_PNGFilter p("decode", &discard, Pl_PNGFilter::a_decode, 32, 1, 8);
+    p.write(const_cast<unsigned char*>(data), size);
+    p.finish();
+}
+
+void
+FuzzHelper::run()
+{
+    try
+    {
+        doChecks();
+    }
+    catch (std::runtime_error const& e)
+    {
+        std::cerr << "runtime_error: " << e.what() << std::endl;
+    }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(unsigned char const* data, size_t size)
+{
+    FuzzHelper f(data, size);
+    f.run();
+    return 0;
+}
-- 
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