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-rw-r--r--src/Makefile.test.include7
-rw-r--r--src/test/fuzz/crypto_chacha20_poly1305_aead.cpp72
2 files changed, 79 insertions, 0 deletions
diff --git a/src/Makefile.test.include b/src/Makefile.test.include
index 91aa6175b4..c2536bda3a 100644
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -36,6 +36,7 @@ FUZZ_TARGETS = \
test/fuzz/crypto_aes256 \
test/fuzz/crypto_aes256cbc \
test/fuzz/crypto_chacha20 \
+ test/fuzz/crypto_chacha20_poly1305_aead \
test/fuzz/crypto_common \
test/fuzz/crypto_hkdf_hmac_sha256_l32 \
test/fuzz/crypto_poly1305 \
@@ -509,6 +510,12 @@ 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_chacha20_poly1305_aead_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
+test_fuzz_crypto_chacha20_poly1305_aead_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
+test_fuzz_crypto_chacha20_poly1305_aead_LDADD = $(FUZZ_SUITE_LD_COMMON)
+test_fuzz_crypto_chacha20_poly1305_aead_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
+test_fuzz_crypto_chacha20_poly1305_aead_SOURCES = test/fuzz/crypto_chacha20_poly1305_aead.cpp
+
test_fuzz_crypto_common_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES)
test_fuzz_crypto_common_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
test_fuzz_crypto_common_LDADD = $(FUZZ_SUITE_LD_COMMON)
diff --git a/src/test/fuzz/crypto_chacha20_poly1305_aead.cpp b/src/test/fuzz/crypto_chacha20_poly1305_aead.cpp
new file mode 100644
index 0000000000..48e4263f27
--- /dev/null
+++ b/src/test/fuzz/crypto_chacha20_poly1305_aead.cpp
@@ -0,0 +1,72 @@
+// 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/chacha_poly_aead.h>
+#include <crypto/poly1305.h>
+#include <test/fuzz/FuzzedDataProvider.h>
+#include <test/fuzz/fuzz.h>
+#include <test/fuzz/util.h>
+
+#include <cassert>
+#include <cstdint>
+#include <limits>
+#include <vector>
+
+void test_one_input(const std::vector<uint8_t>& buffer)
+{
+ FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
+
+ const std::vector<uint8_t> k1 = ConsumeFixedLengthByteVector(fuzzed_data_provider, CHACHA20_POLY1305_AEAD_KEY_LEN);
+ const std::vector<uint8_t> k2 = ConsumeFixedLengthByteVector(fuzzed_data_provider, CHACHA20_POLY1305_AEAD_KEY_LEN);
+
+ ChaCha20Poly1305AEAD aead(k1.data(), k1.size(), k2.data(), k2.size());
+ uint64_t seqnr_payload = 0;
+ uint64_t seqnr_aad = 0;
+ int aad_pos = 0;
+ size_t buffer_size = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096);
+ std::vector<uint8_t> in(buffer_size + CHACHA20_POLY1305_AEAD_AAD_LEN + POLY1305_TAGLEN, 0);
+ std::vector<uint8_t> out(buffer_size + CHACHA20_POLY1305_AEAD_AAD_LEN + POLY1305_TAGLEN, 0);
+ bool is_encrypt = fuzzed_data_provider.ConsumeBool();
+ while (fuzzed_data_provider.ConsumeBool()) {
+ switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 6)) {
+ case 0: {
+ buffer_size = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(64, 4096);
+ in = std::vector<uint8_t>(buffer_size + CHACHA20_POLY1305_AEAD_AAD_LEN + POLY1305_TAGLEN, 0);
+ out = std::vector<uint8_t>(buffer_size + CHACHA20_POLY1305_AEAD_AAD_LEN + POLY1305_TAGLEN, 0);
+ break;
+ }
+ case 1: {
+ (void)aead.Crypt(seqnr_payload, seqnr_aad, aad_pos, out.data(), out.size(), in.data(), buffer_size, is_encrypt);
+ break;
+ }
+ case 2: {
+ uint32_t len = 0;
+ const bool ok = aead.GetLength(&len, seqnr_aad, aad_pos, in.data());
+ assert(ok);
+ break;
+ }
+ case 3: {
+ seqnr_payload += 1;
+ aad_pos += CHACHA20_POLY1305_AEAD_AAD_LEN;
+ if (aad_pos + CHACHA20_POLY1305_AEAD_AAD_LEN > CHACHA20_ROUND_OUTPUT) {
+ aad_pos = 0;
+ seqnr_aad += 1;
+ }
+ break;
+ }
+ case 4: {
+ seqnr_payload = fuzzed_data_provider.ConsumeIntegral<int>();
+ break;
+ }
+ case 5: {
+ seqnr_aad = fuzzed_data_provider.ConsumeIntegral<int>();
+ break;
+ }
+ case 6: {
+ is_encrypt = fuzzed_data_provider.ConsumeBool();
+ break;
+ }
+ }
+ }
+}