SipHash header only C ++ library.
SipHash is a family of keyed hash functions optimized for short messages. It is widely used to protect hash tables from collision attacks and to authenticate lightweight data.
- Secret key makes hash-flooding attacks impractical
- Small, simple code that runs quickly on short inputs
- Slower than non-cryptographic hashes such as MurmurHash
- 64-bit output is not meant for high-security message authentication or large files
The key must contain at least 16 bytes.
Example:
#include "siphash.hpp" \\... std::array<char, 16> key = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'}; std::string data("hello"); std::cout << "SipHash-2-4 for 'hello': " << siphash_cpp::siphash_2_4(data, key) << std::endl; std::cout << "SipHash-4-8 for 'hello': " << siphash_cpp::siphash_4_8(data, key) << std::endl; std::cout << "SipHash-4-8 for 'hello': " << siphash_cpp::siphash(data, key, 4, 8) << std::endl; siphash_cpp::SipHash siphash; siphash.init(key, 2, 4); std::cout << "SipHash-2-4 for 'hello': " << siphash.update(data).digest() << std::endl;
This library can be installed with vcpkg:
vcpkg install siphash-cpp
After installation, a CMake project may use:
find_package(siphash_cpp CONFIG REQUIRED) target_link_libraries(your_app PRIVATE siphash_cpp::siphash_cpp)
To verify the build with vcpkg, run:
VCPKG_ROOT=/path/to/vcpkg ./scripts/run_tests.sh
git submodule add https://github.com/NewYaroslav/siphash-cpp.git external/siphash-cpp
Then add the subdirectory and link the target in your CMakeLists.txt:
add_subdirectory(external/siphash-cpp) target_link_libraries(your_app PRIVATE siphash_cpp::siphash_cpp)