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Diffstat (limited to '')
-rw-r--r-- | comm/third_party/botan/src/lib/hash/skein/skein_512.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/skein/skein_512.h b/comm/third_party/botan/src/lib/hash/skein/skein_512.h new file mode 100644 index 0000000000..0bf173cebd --- /dev/null +++ b/comm/third_party/botan/src/lib/hash/skein/skein_512.h @@ -0,0 +1,72 @@ +/* +* The Skein-512 hash function +* (C) 2009,2014 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_SKEIN_512_H_ +#define BOTAN_SKEIN_512_H_ + +#include <botan/hash.h> +#include <botan/threefish_512.h> +#include <string> +#include <memory> + +BOTAN_FUTURE_INTERNAL_HEADER(skin_512.h) + +namespace Botan { + +/** +* Skein-512, a SHA-3 candidate +*/ +class BOTAN_PUBLIC_API(2,0) Skein_512 final : public HashFunction + { + public: + /** + * @param output_bits the output size of Skein in bits + * @param personalization is a string that will parameterize the + * hash output + */ + Skein_512(size_t output_bits = 512, + const std::string& personalization = ""); + + size_t hash_block_size() const override { return 64; } + 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: + enum type_code { + SKEIN_KEY = 0, + SKEIN_CONFIG = 4, + SKEIN_PERSONALIZATION = 8, + SKEIN_PUBLIC_KEY = 12, + SKEIN_KEY_IDENTIFIER = 16, + SKEIN_NONCE = 20, + SKEIN_MSG = 48, + SKEIN_OUTPUT = 63 + }; + + void add_data(const uint8_t input[], size_t length) override; + void final_result(uint8_t out[]) override; + + void ubi_512(const uint8_t msg[], size_t msg_len); + + void initial_block(); + void reset_tweak(type_code type, bool is_final); + + std::string m_personalization; + size_t m_output_bits; + + std::unique_ptr<Threefish_512> m_threefish; + secure_vector<uint64_t> m_T; + secure_vector<uint8_t> m_buffer; + size_t m_buf_pos; + }; + +} + +#endif |