Add SHAKE256

.github/workflows/ci.yml

@@ -226,6 +226,26 @@ jobs:
               - "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main"
             source_keys:
               - "https://apt.llvm.org/llvm-snapshot.gpg.key"
+          - toolset: clang
+            compiler: clang++-18
+            cxxstd: "03,11,14,17,20,2b"
+            os: ubuntu-24.04
+            install:
+              - clang-18
+            sources:
+              - "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-18 main"
+            source_keys:
+              - "https://apt.llvm.org/llvm-snapshot.gpg.key"
+          - toolset: clang
+            compiler: clang++-19
+            cxxstd: "03,11,14,17,20,2b"
+            os: ubuntu-24.04
+            install:
+              - clang-19
+            sources:
+              - "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-19 main"
+            source_keys:
+              - "https://apt.llvm.org/llvm-snapshot.gpg.key"
           - name: UBSAN
             toolset: clang
             compiler: clang++-14

fuzzing/fuzz_shake256.cpp

@@ -0,0 +1,58 @@
+// Copyright 2024 Matt Borland
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/crypt/hash/shake256.hpp>
+#include <iostream>
+#include <exception>
+#include <string>
+#include <cstdlib>
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data, std::size_t size)
+{
+    try
+    {
+        auto c_data = reinterpret_cast<const char*>(data);
+        std::string c_data_str {c_data, size}; // Guarantee null termination since we can't pass the size argument
+
+        boost::crypt::shake256(c_data_str);
+        boost::crypt::shake256(c_data, size);
+        boost::crypt::shake256(data, size);
+
+        #ifdef BOOST_CRYPT_HAS_STRING_VIEW
+        std::string_view view {c_data_str};
+        boost::crypt::shake256(view);
+        #endif
+
+        #ifdef BOOST_CRYPT_HAS_SPAN
+        std::span data_span {c_data, size};
+        boost::crypt::shake256(data_span);
+        #endif
+
+        // Fuzz the hasher object
+        boost::crypt::shake256_hasher hasher;
+        hasher.process_bytes(data, size);
+        hasher.process_bytes(data, size);
+        hasher.process_bytes(data, size);
+        hasher.get_digest();
+        hasher.process_bytes(data, size); // State is invalid but should not crash
+
+        hasher.init();
+        std::uint8_t* return_buffer = static_cast<std::uint8_t*>(std::malloc(size));
+        hasher.process_bytes(data, size);
+        hasher.get_digest(return_buffer, size);
+        if (return_buffer != nullptr)
+        {
+            std::free(return_buffer);
+            return_buffer = nullptr;
+        }
+        hasher.get_digest(return_buffer, size);
+    }
+    catch(...)
+    {
+        std::cerr << "Error with: " << data << std::endl;
+        std::terminate();
+    }
+
+    return 0;
+}

fuzzing/seedcorpus/fuzz_shake256/shake256.txt

@@ -0,0 +1,18 @@
+"The quick brown fox jumps over the lazy dog"
+"The quick brown fox jumps over the lazy dog."
+""
+"aB3$x9Yz"
+"12345"
+"!@#$%^&*()"
+"FuzzTest123"
+" "
+"Lorem ipsum dolor sit amet"
+"a"
+"9876543210"
+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+"ñÑáéíóúÁÉÍÓÚ"
+"\n\r\t"
+"0"
+"ThisIsAVeryLongStringWithNoSpacesOrPunctuationToTestEdgeCases"
+"<?php echo 'test'; ?>"
+"SELECT * FROM users;"