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Diffstat (limited to 'comm/third_party/botan/src/lib/hash/sha3/sha3.h')
-rw-r--r-- | comm/third_party/botan/src/lib/hash/sha3/sha3.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/hash/sha3/sha3.h b/comm/third_party/botan/src/lib/hash/sha3/sha3.h new file mode 100644 index 0000000000..e290e60a20 --- /dev/null +++ b/comm/third_party/botan/src/lib/hash/sha3/sha3.h @@ -0,0 +1,136 @@ +/* +* SHA-3 +* (C) 2010,2016 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_SHA3_H_ +#define BOTAN_SHA3_H_ + +#include <botan/hash.h> +#include <botan/secmem.h> +#include <string> + +BOTAN_FUTURE_INTERNAL_HEADER(sha3.h) + +namespace Botan { + +/** +* SHA-3 +*/ +class BOTAN_PUBLIC_API(2,0) SHA_3 : public HashFunction + { + public: + + /** + * @param output_bits the size of the hash output; must be one of + * 224, 256, 384, or 512 + */ + explicit SHA_3(size_t output_bits); + + size_t hash_block_size() const override { return m_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; + std::string provider() const override; + + // Static functions for internal usage + + /** + * Absorb data into the provided state + * @param bitrate the bitrate to absorb into the sponge + * @param S the sponge state + * @param S_pos where to begin absorbing into S + * @param input the input data + * @param length size of input in bytes + */ + static size_t absorb(size_t bitrate, + secure_vector<uint64_t>& S, size_t S_pos, + const uint8_t input[], size_t length); + + /** + * Add final padding and permute. The padding is assumed to be + * init_pad || 00... || fini_pad + * + * @param bitrate the bitrate to absorb into the sponge + * @param S the sponge state + * @param S_pos where to begin absorbing into S + * @param init_pad the leading pad bits + * @param fini_pad the final pad bits + */ + static void finish(size_t bitrate, + secure_vector<uint64_t>& S, size_t S_pos, + uint8_t init_pad, uint8_t fini_pad); + + /** + * Expand from provided state + * @param bitrate sponge parameter + * @param S the state + * @param output the output buffer + * @param output_length the size of output in bytes + */ + static void expand(size_t bitrate, + secure_vector<uint64_t>& S, + uint8_t output[], size_t output_length); + + /** + * The bare Keccak-1600 permutation + */ + static void permute(uint64_t A[25]); + + private: + void add_data(const uint8_t input[], size_t length) override; + void final_result(uint8_t out[]) override; + +#if defined(BOTAN_HAS_SHA3_BMI2) + static void permute_bmi2(uint64_t A[25]); +#endif + + size_t m_output_bits, m_bitrate; + secure_vector<uint64_t> m_S; + size_t m_S_pos; + }; + +/** +* SHA-3-224 +*/ +class BOTAN_PUBLIC_API(2,0) SHA_3_224 final : public SHA_3 + { + public: + SHA_3_224() : SHA_3(224) {} + }; + +/** +* SHA-3-256 +*/ +class BOTAN_PUBLIC_API(2,0) SHA_3_256 final : public SHA_3 + { + public: + SHA_3_256() : SHA_3(256) {} + }; + +/** +* SHA-3-384 +*/ +class BOTAN_PUBLIC_API(2,0) SHA_3_384 final : public SHA_3 + { + public: + SHA_3_384() : SHA_3(384) {} + }; + +/** +* SHA-3-512 +*/ +class BOTAN_PUBLIC_API(2,0) SHA_3_512 final : public SHA_3 + { + public: + SHA_3_512() : SHA_3(512) {} + }; + +} + +#endif |