47 lines
750 B
C
47 lines
750 B
C
#include <string.h>
|
|
#include "randombytes.h"
|
|
#include "crypto_sign.h"
|
|
#include "crypto_hash_sha512.h"
|
|
#include "ge.h"
|
|
|
|
int crypto_sign_seckey_expand(unsigned char *sk,const unsigned char *seed)
|
|
{
|
|
crypto_hash_sha512(sk,seed,32);
|
|
sk[0] &= 248;
|
|
sk[31] &= 63;
|
|
sk[31] |= 64;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int crypto_sign_seckey(unsigned char *sk)
|
|
{
|
|
unsigned char seed[32];
|
|
|
|
if (randombytes(seed,32) < 0)
|
|
return -1;
|
|
|
|
crypto_sign_seckey_expand(sk,seed);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int crypto_sign_pubkey(unsigned char *pk,const unsigned char *sk)
|
|
{
|
|
ge_p3 A;
|
|
|
|
ge_scalarmult_base(&A,sk);
|
|
ge_p3_tobytes(pk,&A);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int crypto_sign_keypair(unsigned char *pk,unsigned char *sk)
|
|
{
|
|
crypto_sign_seckey(sk);
|
|
crypto_sign_pubkey(pk,sk);
|
|
|
|
return 0;
|
|
}
|