31 lines
827 B
C
31 lines
827 B
C
#include "ed25519.h"
|
|
#include "sha512.h"
|
|
#include "ge.h"
|
|
#include "sc.h"
|
|
|
|
|
|
void ed25519_sign(unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key, const unsigned char *private_key) {
|
|
sha512_context hash;
|
|
unsigned char hram[64];
|
|
unsigned char r[64];
|
|
ge_p3 R;
|
|
|
|
|
|
sha512_init(&hash);
|
|
sha512_update(&hash, private_key + 32, 32);
|
|
sha512_update(&hash, message, message_len);
|
|
sha512_final(&hash, r);
|
|
|
|
sc_reduce(r);
|
|
ge_scalarmult_base(&R, r);
|
|
ge_p3_tobytes(signature, &R);
|
|
|
|
sha512_init(&hash);
|
|
sha512_update(&hash, signature, 32);
|
|
sha512_update(&hash, public_key, 32);
|
|
sha512_update(&hash, message, message_len);
|
|
sha512_final(&hash, hram);
|
|
|
|
sc_reduce(hram);
|
|
sc_muladd(signature + 32, hram, private_key, r);
|
|
}
|