diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/hash/shake/shake.h')
-rw-r--r-- | comm/third_party/botan/src/lib/hash/shake/shake.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/shake/shake.h b/comm/third_party/botan/src/lib/hash/shake/shake.h new file mode 100644 index 0000000000..c52df136b7 --- /dev/null +++ b/comm/third_party/botan/src/lib/hash/shake/shake.h @@ -0,0 +1,85 @@ +/* +* SHAKE hash functions +* (C) 2010,2016 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_SHAKE_HASH_H_ +#define BOTAN_SHAKE_HASH_H_ + +#include <botan/hash.h> +#include <botan/secmem.h> +#include <string> + +BOTAN_FUTURE_INTERNAL_HEADER(shake.h) + +namespace Botan { + +/** +* SHAKE-128 +*/ +class BOTAN_PUBLIC_API(2,0) SHAKE_128 final : public HashFunction + { + public: + + /** + * @param output_bits the desired output size in bits + * must be a multiple of 8 + */ + explicit SHAKE_128(size_t output_bits); + + size_t hash_block_size() const override { return SHAKE_128_BITRATE / 8; } + size_t output_length() const override { return m_output_bits / 8; } + + HashFunction* clone() const override; + std::unique_ptr<HashFunction> copy_state() const override; + std::string name() const override; + void clear() override; + + private: + void add_data(const uint8_t input[], size_t length) override; + void final_result(uint8_t out[]) override; + + static const size_t SHAKE_128_BITRATE = 1600 - 256; + + size_t m_output_bits; + secure_vector<uint64_t> m_S; + size_t m_S_pos; + }; + +/** +* SHAKE-256 +*/ +class BOTAN_PUBLIC_API(2,0) SHAKE_256 final : public HashFunction + { + public: + + /** + * @param output_bits the desired output size in bits + * must be a multiple of 8 + */ + explicit SHAKE_256(size_t output_bits); + + size_t hash_block_size() const override { return SHAKE_256_BITRATE / 8; } + size_t output_length() const override { return m_output_bits / 8; } + + HashFunction* clone() const override; + std::unique_ptr<HashFunction> copy_state() const override; + std::string name() const override; + void clear() override; + + private: + void add_data(const uint8_t input[], size_t length) override; + void final_result(uint8_t out[]) override; + + static const size_t SHAKE_256_BITRATE = 1600 - 512; + + size_t m_output_bits; + secure_vector<uint64_t> m_S; + size_t m_S_pos; + }; + +} + +#endif |