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#include <string.h>
#include "crypto_sign.h"
#include "crypto_hash_sha512.h"
#include "ge.h"
#include "sc.h"
int crypto_sign(
unsigned char *sm,
const unsigned char *m,unsigned long long mlen,
const unsigned char *pw,unsigned long long pwlen
)
{
unsigned char az[64];
unsigned char nonce[64];
unsigned char hram[64];
ge_p3 A, R;
crypto_hash_sha512(az,pw,pwlen);
az[0] &= 248;
az[31] &= 63;
az[31] |= 64;
memmove(sm + 64,m,mlen);
memmove(sm + 32,az + 32,32);
crypto_hash_sha512(nonce,sm + 32,mlen + 32);
ge_scalarmult_base(&A,az);
ge_p3_tobytes(sm + 32,&A);
sc_reduce(nonce);
ge_scalarmult_base(&R,nonce);
ge_p3_tobytes(sm,&R);
crypto_hash_sha512(hram,sm,mlen + 64);
sc_reduce(hram);
sc_muladd(sm + 32,hram,az,nonce);
return 0;
}
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