core: Add utilities for generating SHA256 hashes.

components/core/.clang-format

@@ -75,7 +75,7 @@ IncludeCategories:
   # Library headers. Update when adding new libraries.
   # NOTE: clang-format retains leading white-space on a line in violation of the YAML spec.
   - Regex: "<(absl|antlr4|archive|boost|bsoncxx|catch2|curl|date|fmt|json|log_surgeon|mariadb\
-|mongocxx|msgpack|outcome|regex_utils|simdjson|spdlog|sqlite3|string_utils|yaml-cpp|zstd)"
+|mongocxx|msgpack|openssl|outcome|regex_utils|simdjson|spdlog|sqlite3|string_utils|yaml-cpp|zstd)"
     Priority: 3
   # C system headers
   - Regex: "^<.+\\.h>"

components/core/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5.1)
+cmake_minimum_required(VERSION 3.16.3)
 project(CLP LANGUAGES CXX C)
 
 if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
@@ -146,6 +146,14 @@ else()
     message(FATAL_ERROR "Could not find ${CLP_LIBS_STRING} libraries for CURL")
 endif()
 
+# Find OpenSSL
+find_package(OpenSSL REQUIRED)
+if (OPENSSL_FOUND)
+    message(STATUS "Found OpenSSL (${OPENSSL_VERSION})")
+else ()
+    message(FATAL_ERROR "OpenSSL not found")
+endif ()
+
 # Add log surgeon
 add_subdirectory(submodules/log-surgeon EXCLUDE_FROM_ALL)
 
@@ -344,6 +352,8 @@ set(SOURCE_FILES_unitTest
         src/clp/GlobalSQLiteMetadataDB.hpp
         src/clp/Grep.cpp
         src/clp/Grep.hpp
+        src/clp/hash_utils.cpp
+        src/clp/hash_utils.hpp
         src/clp/ir/constants.hpp
         src/clp/ir/LogEvent.hpp
         src/clp/ir/LogEventDeserializer.cpp
@@ -462,6 +472,7 @@ set(SOURCE_FILES_unitTest
         tests/test-encoding_methods.cpp
         tests/test-ffi_SchemaTree.cpp
         tests/test-Grep.cpp
+        tests/test-hash_utils.cpp
         tests/test-ir_encoding_methods.cpp
         tests/test-ir_parsing.cpp
         tests/test-kql.cpp
@@ -497,6 +508,7 @@ target_link_libraries(unitTest
         LibArchive::LibArchive
         MariaDBClient::MariaDBClient
         spdlog::spdlog
+        OpenSSL::Crypto
         ${sqlite_LIBRARY_DEPENDENCIES}
         ${STD_FS_LIBS}
         clp::regex_utils