Merge #19934: tests: Add fuzzing harness for Keccak and SHA3_256

fc7f84a tests: Add fuzzing harness for Keccak and SHA3_256 (practicalswift)

Pull request description:

  Add fuzzing harness for Keccak and SHA3_256.

  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 :)

ACKs for top commit:
  laanwj:
    uACK fc7f84a
  elichai:
    utACK :) fc7f84a

Tree-SHA512: 01e1610e1c178d5f42578e2dd5644a4165596db34cf5037d574a5285e0ace4b06dc33ab81a308595246117537fe175294efd4bfc174ffc2e8eac98f0ec9dd3e9

src/test/fuzz/crypto.cpp

@@ -7,6 +7,7 @@
 #include <crypto/ripemd160.h>
 #include <crypto/sha1.h>
 #include <crypto/sha256.h>
+#include <crypto/sha3.h>
 #include <crypto/sha512.h>
 #include <hash.h>
 #include <test/fuzz/FuzzedDataProvider.h>
@@ -32,6 +33,7 @@ void test_one_input(const std::vector<uint8_t>& buffer)
     CSHA1 sha1;
     CSHA256 sha256;
     CSHA512 sha512;
+    SHA3_256 sha3;
     CSipHasher sip_hasher{fuzzed_data_provider.ConsumeIntegral<uint64_t>(), fuzzed_data_provider.ConsumeIntegral<uint64_t>()};
 
     while (fuzzed_data_provider.ConsumeBool()) {
@@ -51,6 +53,7 @@ void test_one_input(const std::vector<uint8_t>& buffer)
             (void)ripemd160.Write(data.data(), data.size());
             (void)sha1.Write(data.data(), data.size());
             (void)sha256.Write(data.data(), data.size());
+            (void)sha3.Write(data);
             (void)sha512.Write(data.data(), data.size());
             (void)sip_hasher.Write(data.data(), data.size());
 
@@ -65,11 +68,12 @@ void test_one_input(const std::vector<uint8_t>& buffer)
             (void)ripemd160.Reset();
             (void)sha1.Reset();
             (void)sha256.Reset();
+            (void)sha3.Reset();
             (void)sha512.Reset();
             break;
         }
         case 2: {
-            switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 8)) {
+            switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 9)) {
             case 0: {
                 data.resize(CHash160::OUTPUT_SIZE);
                 hash160.Finalize(data);
@@ -115,9 +119,21 @@ void test_one_input(const std::vector<uint8_t>& buffer)
                 data[0] = sip_hasher.Finalize() % 256;
                 break;
             }
+            case 9: {
+                data.resize(SHA3_256::OUTPUT_SIZE);
+                sha3.Finalize(data);
+                break;
+            }
             }
             break;
         }
         }
     }
+    if (fuzzed_data_provider.ConsumeBool()) {
+        uint64_t state[25];
+        for (size_t i = 0; i < 25; ++i) {
+            state[i] = fuzzed_data_provider.ConsumeIntegral<uint64_t>();
+        }
+        KeccakF(state);
+    }
 }