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Diffstat (limited to 'comm/third_party/botan/src/lib/misc/tss/tss.h')
-rw-r--r-- | comm/third_party/botan/src/lib/misc/tss/tss.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/misc/tss/tss.h b/comm/third_party/botan/src/lib/misc/tss/tss.h new file mode 100644 index 0000000000..89848c43e6 --- /dev/null +++ b/comm/third_party/botan/src/lib/misc/tss/tss.h @@ -0,0 +1,104 @@ +/* +* RTSS (threshold secret sharing) +* (C) 2009,2018 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_RTSS_H_ +#define BOTAN_RTSS_H_ + +#include <botan/secmem.h> +#include <string> +#include <vector> + +namespace Botan { + +class RandomNumberGenerator; + +/** +* A split secret, using the format from draft-mcgrew-tss-03 +*/ +class BOTAN_PUBLIC_API(2,0) RTSS_Share final + { + public: + /** + * @param M the number of shares needed to reconstruct + * @param N the number of shares generated + * @param secret the secret to split + * @param secret_len the length of the secret + * @param identifier the 16 byte share identifier + * @param rng the random number generator to use + */ + static std::vector<RTSS_Share> + split(uint8_t M, uint8_t N, + const uint8_t secret[], uint16_t secret_len, + const uint8_t identifier[16], + RandomNumberGenerator& rng); + + /** + * @param M the number of shares needed to reconstruct + * @param N the number of shares generated + * @param secret the secret to split + * @param secret_len the length of the secret + * @param identifier the share identifier + * @param hash_fn the hash function to use for a checksum ("None", "SHA-1", "SHA-256") + * @param rng the random number generator to use + */ + static std::vector<RTSS_Share> + split(uint8_t M, uint8_t N, + const uint8_t secret[], uint16_t secret_len, + const std::vector<uint8_t>& identifier, + const std::string& hash_fn, + RandomNumberGenerator& rng); + + /** + * @param shares the list of shares + */ + static secure_vector<uint8_t> + reconstruct(const std::vector<RTSS_Share>& shares); + + RTSS_Share() = default; + + /** + * @param hex_input the share encoded in hexadecimal + */ + explicit RTSS_Share(const std::string& hex_input); + + /** + * @param data the shared data + * @param len the length of data + */ + RTSS_Share(const uint8_t data[], size_t len); + + /** + * @return binary representation + */ + const secure_vector<uint8_t>& data() const { return m_contents; } + + /** + * @return hex representation + */ + std::string to_string() const; + + /** + * @return share identifier + */ + uint8_t share_id() const; + + /** + * @return size of this share in bytes + */ + size_t size() const { return m_contents.size(); } + + /** + * @return if this TSS share was initialized or not + */ + bool initialized() const { return (m_contents.size() > 0); } + private: + secure_vector<uint8_t> m_contents; + }; + +} + +#endif |