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#include <string.h>
#include "crypto_hash_sha512.h"
#include "crypto_vrf_rfc9381.h"
#include "private/ed25519_ref10.h"
#include "randombytes.h"
#include "utils.h"
int
crypto_vrf_rfc9381_seed_keypair(unsigned char *pk, unsigned char *sk,
const unsigned char *seed)
{
ge25519_p3 A;
crypto_hash_sha512(sk, seed, 32);
sk[0] &= 248;
sk[31] &= 127;
sk[31] |= 64;
ge25519_scalarmult_base(&A, sk);
ge25519_p3_tobytes(pk, &A);
memmove(sk, seed, 32);
memmove(sk + 32, pk, 32);
return 0;
}
int
crypto_vrf_rfc9381_keypair(unsigned char *pk, unsigned char *sk)
{
unsigned char seed[32];
int ret;
randombytes_buf(seed, sizeof seed);
ret = crypto_vrf_rfc9381_seed_keypair(pk, sk, seed);
sodium_memzero(seed, sizeof seed);
return ret;
}
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