93 řádky
2.0 KiB
C
93 řádky
2.0 KiB
C
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include "../crypto_sign.h"
|
|
|
|
#define MAXMBYTES 2048
|
|
|
|
typedef uint32_t uint32;
|
|
|
|
static uint32 seed[32] = { 3,1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3,3,8,3,2,7,9,5 } ;
|
|
static uint32 in[12];
|
|
static uint32 out[8];
|
|
static int outleft = 0;
|
|
|
|
#define ROTATE(x,b) (((x) << (b)) | ((x) >> (32 - (b))))
|
|
#define MUSH(i,b) x = t[i] += (((x ^ seed[i]) + sum) ^ ROTATE(x,b));
|
|
|
|
static void surf(void)
|
|
{
|
|
uint32 t[12]; uint32 x; uint32 sum = 0;
|
|
int r; int i; int loop;
|
|
|
|
for (i = 0;i < 12;++i) t[i] = in[i] ^ seed[12 + i];
|
|
for (i = 0;i < 8;++i) out[i] = seed[24 + i];
|
|
x = t[11];
|
|
for (loop = 0;loop < 2;++loop) {
|
|
for (r = 0;r < 16;++r) {
|
|
sum += 0x9e3779b9;
|
|
MUSH(0,5) MUSH(1,7) MUSH(2,9) MUSH(3,13)
|
|
MUSH(4,5) MUSH(5,7) MUSH(6,9) MUSH(7,13)
|
|
MUSH(8,5) MUSH(9,7) MUSH(10,9) MUSH(11,13)
|
|
}
|
|
for (i = 0;i < 8;++i) out[i] ^= t[i + 4];
|
|
}
|
|
}
|
|
|
|
void randombytes(unsigned char *x,unsigned long long xlen)
|
|
{
|
|
while (xlen > 0) {
|
|
if (!outleft) {
|
|
if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3];
|
|
surf();
|
|
outleft = 8;
|
|
}
|
|
*x = out[--outleft];
|
|
++x;
|
|
--xlen;
|
|
}
|
|
}
|
|
|
|
|
|
unsigned char pk[CRYPTO_PUBLICKEYBYTES];
|
|
unsigned char sk[CRYPTO_SECRETKEYBYTES];
|
|
unsigned char m[MAXMBYTES];
|
|
unsigned char sm[MAXMBYTES+CRYPTO_BYTES];
|
|
//unsigned char mo[MAXMBYTES+CRYPTO_BYTES];
|
|
unsigned long long smlen;
|
|
unsigned long long mlen;
|
|
|
|
int main(void)
|
|
{
|
|
int n,i,r;
|
|
for(n=0;n<MAXMBYTES;n++)
|
|
{
|
|
crypto_sign_keypair(pk,sk);
|
|
randombytes(m,n);
|
|
|
|
crypto_sign(sm, &smlen, m, n, sk);
|
|
for(i=0;i<smlen;i++)
|
|
printf("%02x",sm[i]);
|
|
printf("\n");
|
|
r = crypto_sign_open(sm, &mlen, sm, smlen, pk);
|
|
if(r)
|
|
{
|
|
printf("signature verification fails\n");
|
|
return -1;
|
|
}
|
|
if(mlen != n)
|
|
{
|
|
printf("signature verification produces wrong message length\n");
|
|
return -1;
|
|
}
|
|
for(i=0;i<n;i++)
|
|
{
|
|
if(sm[i] != m[i])
|
|
{
|
|
printf("signature verification does not recover message\n");
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|