mirror of
https://github.com/henrydcase/pqc.git
synced 2024-11-23 07:59:01 +00:00
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
|
#ifndef __THREE_BEARS_BABYBEAREPHEM_H__
|
||
|
|
#define __THREE_BEARS_BABYBEAREPHEM_H__
|
||
|
|
|
||
|
|
#include <stddef.h> /* for size_t */
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#define BABYBEAREPHEM_KEYGEN_SEED_BYTES 40
|
||
|
|
#define BABYBEAREPHEM_PRIVATE_KEY_BYTES BABYBEAREPHEM_KEYGEN_SEED_BYTES
|
||
|
|
#define BABYBEAREPHEM_SHARED_SECRET_BYTES 32
|
||
|
|
#define BABYBEAREPHEM_ENC_SEED_AND_IV_BYTES 32
|
||
|
|
#define BABYBEAREPHEM_PUBLIC_KEY_BYTES 804
|
||
|
|
#define BABYBEAREPHEM_CAPSULE_BYTES 917
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Expand a secret seed to a public/private keypair.
|
||
|
|
*
|
||
|
|
* @param[out] pk The public key.
|
||
|
|
* @param[in] sk The private key, which must be uniformly random.
|
||
|
|
*/
|
||
|
|
void PQCLEAN_BABYBEAREPHEM_CLEAN_get_pubkey (
|
||
|
|
uint8_t pk[BABYBEAREPHEM_PUBLIC_KEY_BYTES],
|
||
|
|
const uint8_t sk[BABYBEAREPHEM_PRIVATE_KEY_BYTES]
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a shared secret using a random seed and another party's public key.
|
||
|
|
*
|
||
|
|
* Input and output parameters may not alias.
|
||
|
|
*
|
||
|
|
* @param[out] shared_secret The shared secret key.
|
||
|
|
* @param[out] capsule A ciphertext to send to the other party.
|
||
|
|
* @param[in] pk The other party's public key.
|
||
|
|
* @param[in] seed A random seed.
|
||
|
|
*/
|
||
|
|
void PQCLEAN_BABYBEAREPHEM_CLEAN_encapsulate (
|
||
|
|
uint8_t shared_secret[BABYBEAREPHEM_SHARED_SECRET_BYTES],
|
||
|
|
uint8_t capsule[BABYBEAREPHEM_CAPSULE_BYTES],
|
||
|
|
const uint8_t pk[BABYBEAREPHEM_PUBLIC_KEY_BYTES],
|
||
|
|
const uint8_t seed[BABYBEAREPHEM_ENC_SEED_AND_IV_BYTES]
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Extract the shared secret from a capsule using the private key.
|
||
|
|
* Has a negligible but nonzero probability of failure.
|
||
|
|
*
|
||
|
|
* Input and output parameters may not alias.
|
||
|
|
*
|
||
|
|
* @param[out] shared_secret The shared secret.
|
||
|
|
* @param[in] capsule The capsule produced by encapsulate_cca2.
|
||
|
|
* @param[in] sk The private key.
|
||
|
|
* @return -1 on failure, 0 on success.
|
||
|
|
* @warning The value of shared_secret must not be used on failure
|
||
|
|
*/
|
||
|
|
void PQCLEAN_BABYBEAREPHEM_CLEAN_decapsulate (
|
||
|
|
uint8_t shared_secret[BABYBEAREPHEM_SHARED_SECRET_BYTES],
|
||
|
|
const uint8_t capsule[BABYBEAREPHEM_CAPSULE_BYTES],
|
||
|
|
const uint8_t sk[BABYBEAREPHEM_PRIVATE_KEY_BYTES]
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif
|