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tests: Add fuzzing harness for ChaCha20

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This commit is contained in:
practicalswift
2020-06-17 11:12:05 +00:00
parent e9e8aac029
commit 2fc4e5916c
2 changed files with 57 additions and 0 deletions
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7
src/Makefile.test.include
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@@ -35,6 +35,7 @@ FUZZ_TARGETS = \
test/fuzz/crypto \ test/fuzz/crypto \
test/fuzz/crypto_aes256 \ test/fuzz/crypto_aes256 \
test/fuzz/crypto_aes256cbc \ test/fuzz/crypto_aes256cbc \
test/fuzz/crypto_chacha20 \
test/fuzz/crypto_common \ test/fuzz/crypto_common \
test/fuzz/crypto_hkdf_hmac_sha256_l32 \ test/fuzz/crypto_hkdf_hmac_sha256_l32 \
test/fuzz/crypto_poly1305 \ test/fuzz/crypto_poly1305 \
@@ -502,6 +503,12 @@ test_fuzz_crypto_aes256cbc_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_crypto_aes256cbc_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS) test_fuzz_crypto_aes256cbc_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_crypto_aes256cbc_SOURCES = test/fuzz/crypto_aes256cbc.cpp test_fuzz_crypto_aes256cbc_SOURCES = test/fuzz/crypto_aes256cbc.cpp
test_fuzz_crypto_chacha20_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_crypto_chacha20_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_crypto_chacha20_LDADD = $(FUZZ_SUITE_LD_COMMON)
test_fuzz_crypto_chacha20_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
test_fuzz_crypto_chacha20_SOURCES = test/fuzz/crypto_chacha20.cpp
test_fuzz_crypto_common_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) test_fuzz_crypto_common_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_crypto_common_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) test_fuzz_crypto_common_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_crypto_common_LDADD = $(FUZZ_SUITE_LD_COMMON) test_fuzz_crypto_common_LDADD = $(FUZZ_SUITE_LD_COMMON)

50
src/test/fuzz/crypto_chacha20.cpp Normal file
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@@ -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;
}
}
}
}