Merge #19286: tests: Add fuzzing harness for CHash{160,256}, C{HMAC_,}SHA{1,256,512}, CRIPEMD160, CSipHasher, etc.

67bb7be864f38ef5afc731aa427146cb2af500dd tests: Add fuzzing harness for CHash{160,256}, C{HMAC_,}SHA{1,256,512}, CRIPEMD160, CSipHasher, etc. (practicalswift)

Pull request description:

  Add fuzzing harness for `CHash{160,256}`, `C{HMAC_,}SHA{1,256,512}`, `CRIPEMD160`, `CSipHasher`, etc.

  See [`doc/fuzzing.md`](https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md) for information on how to fuzz Bitcoin Core. Don't forget to contribute any coverage increasing inputs you find to the [Bitcoin Core fuzzing corpus repo](https://github.com/bitcoin-core/qa-assets).

  Happy fuzzing :)

Top commit has no ACKs.

Tree-SHA512: 5377b361097211a7d0b90a26ed1c6dadb9ecce11349036d19f8c9ad2818cd98709bbcbf1c2361dd18eae122b8dbce1c71bb5aa2e85660677e235b8974ae33fcc

1 files changed, 124 insertions, 0 deletions

diff --git a/src/test/fuzz/crypto.cpp b/src/test/fuzz/crypto.cpp
new file mode 100644
index 0000000000..595cdf9abb
--- /dev/null
+++ b/src/test/fuzz/crypto.cpp
@@ -0,0 +1,124 @@
+// 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/hmac_sha256.h>
+#include <crypto/hmac_sha512.h>
+#include <crypto/ripemd160.h>
+#include <crypto/sha1.h>
+#include <crypto/sha256.h>
+#include <crypto/sha512.h>
+#include <hash.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()};
+    std::vector<uint8_t> data = ConsumeRandomLengthByteVector(fuzzed_data_provider);
+    if (data.empty()) {
+        data.resize(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 4096), fuzzed_data_provider.ConsumeIntegral<uint8_t>());
+    }
+
+    CHash160 hash160;
+    CHash256 hash256;
+    CHMAC_SHA256 hmac_sha256{data.data(), data.size()};
+    CHMAC_SHA512 hmac_sha512{data.data(), data.size()};
+    CRIPEMD160 ripemd160;
+    CSHA1 sha1;
+    CSHA256 sha256;
+    CSHA512 sha512;
+    CSipHasher sip_hasher{fuzzed_data_provider.ConsumeIntegral<uint64_t>(), fuzzed_data_provider.ConsumeIntegral<uint64_t>()};
+
+    while (fuzzed_data_provider.ConsumeBool()) {
+        switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 2)) {
+        case 0: {
+            if (fuzzed_data_provider.ConsumeBool()) {
+                data = ConsumeRandomLengthByteVector(fuzzed_data_provider);
+                if (data.empty()) {
+                    data.resize(fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 4096), fuzzed_data_provider.ConsumeIntegral<uint8_t>());
+                }
+            }
+
+            (void)hash160.Write(data.data(), data.size());
+            (void)hash256.Write(data.data(), data.size());
+            (void)hmac_sha256.Write(data.data(), data.size());
+            (void)hmac_sha512.Write(data.data(), data.size());
+            (void)ripemd160.Write(data.data(), data.size());
+            (void)sha1.Write(data.data(), data.size());
+            (void)sha256.Write(data.data(), data.size());
+            (void)sha512.Write(data.data(), data.size());
+            (void)sip_hasher.Write(data.data(), data.size());
+
+            (void)Hash(data.begin(), data.end());
+            (void)Hash160(data);
+            (void)Hash160(data.begin(), data.end());
+            (void)sha512.Size();
+            break;
+        }
+        case 1: {
+            (void)hash160.Reset();
+            (void)hash256.Reset();
+            (void)ripemd160.Reset();
+            (void)sha1.Reset();
+            (void)sha256.Reset();
+            (void)sha512.Reset();
+            break;
+        }
+        case 2: {
+            switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 8)) {
+            case 0: {
+                data.resize(CHash160::OUTPUT_SIZE);
+                hash160.Finalize(data.data());
+                break;
+            }
+            case 1: {
+                data.resize(CHash256::OUTPUT_SIZE);
+                hash256.Finalize(data.data());
+                break;
+            }
+            case 2: {
+                data.resize(CHMAC_SHA256::OUTPUT_SIZE);
+                hmac_sha256.Finalize(data.data());
+                break;
+            }
+            case 3: {
+                data.resize(CHMAC_SHA512::OUTPUT_SIZE);
+                hmac_sha512.Finalize(data.data());
+                break;
+            }
+            case 4: {
+                data.resize(CRIPEMD160::OUTPUT_SIZE);
+                ripemd160.Finalize(data.data());
+                break;
+            }
+            case 5: {
+                data.resize(CSHA1::OUTPUT_SIZE);
+                sha1.Finalize(data.data());
+                break;
+            }
+            case 6: {
+                data.resize(CSHA256::OUTPUT_SIZE);
+                sha256.Finalize(data.data());
+                break;
+            }
+            case 7: {
+                data.resize(CSHA512::OUTPUT_SIZE);
+                sha512.Finalize(data.data());
+                break;
+            }
+            case 8: {
+                data.resize(1);
+                data[0] = sip_hasher.Finalize() % 256;
+                break;
+            }
+            }
+            break;
+        }
+        }
+    }
+}