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-rw-r--r--src/test/fuzz/crypto_chacha20.cpp50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/test/fuzz/crypto_chacha20.cpp b/src/test/fuzz/crypto_chacha20.cpp
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index 0000000000..b7438d312d
--- /dev/null
+++ b/src/test/fuzz/crypto_chacha20.cpp
@@ -0,0 +1,50 @@
+// Copyright (c) 2020 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <crypto/chacha20.h>
+#include <test/fuzz/FuzzedDataProvider.h>
+#include <test/fuzz/fuzz.h>
+#include <test/fuzz/util.h>
+
+#include <cstdint>
+#include <vector>
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+ FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
+
+ ChaCha20 chacha20;
+ if (fuzzed_data_provider.ConsumeBool()) {
+ const std::vector<unsigned char> key = ConsumeFixedLengthByteVector(fuzzed_data_provider, fuzzed_data_provider.ConsumeIntegralInRange<size_t>(16, 32));
+ chacha20 = ChaCha20{key.data(), key.size()};
+ }
+ while (fuzzed_data_provider.ConsumeBool()) {
+ switch (fuzzed_data_provider.ConsumeIntegralInRange(0, 4)) {
+ case 0: {
+ const std::vector<unsigned char> key = ConsumeFixedLengthByteVector(fuzzed_data_provider, fuzzed_data_provider.ConsumeIntegralInRange<size_t>(16, 32));
+ chacha20.SetKey(key.data(), key.size());
+ break;
+ }
+ case 1: {
+ chacha20.SetIV(fuzzed_data_provider.ConsumeIntegral<uint64_t>());
+ break;
+ }
+ case 2: {
+ chacha20.Seek(fuzzed_data_provider.ConsumeIntegral<uint64_t>());
+ break;
+ }
+ case 3: {
+ std::vector<uint8_t> output(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096));
+ chacha20.Keystream(output.data(), output.size());
+ break;
+ }
+ case 4: {
+ std::vector<uint8_t> output(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096));
+ const std::vector<uint8_t> input = ConsumeFixedLengthByteVector(fuzzed_data_provider, output.size());
+ chacha20.Crypt(input.data(), output.data(), input.size());
+ break;
+ }
+ }
+ }
+}