i2pd/core/crypto/ed25519/keypair.cpp

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#include <string.h>
#include "crypto_sign.h"
#include "crypto_hash_sha512.h"
#include "ge.h"
int crypto_sign_pubkey(unsigned char*pk, const unsigned char* sk)
{
unsigned char az[64];
ge_p3 A;
crypto_hash_sha512(az,sk,32);
az[0] &= 248;
az[31] &= 63;
az[31] |= 64;
ge_scalarmult_base(&A,az);
ge_p3_tobytes(pk,&A);
return 0;
}