return r;
}
-static int32_t write_mpbin(MP_INT *a, uint8_t *buffer,
- int32_t buflen)
+static void write_mpbin_anomalous(MP_INT *a, uint8_t *buffer,
+ int32_t buflen)
+ /* If the BN is smaller than buflen, pads it *at the wrong end* */
{
char *hb = write_mpstring(a);
int32_t len;
hex_decode(buffer, buflen, &len, hb, True);
+ if (len<buflen)
+ memset(buffer+len,0,buflen-len);
free(hb);
- return len;
}
static dh_makeshared_fn dh_makeshared;
mpz_powm_sec(&c, &b, &a, &st->p);
- write_mpbin(&c,sharedsecret,buflen);
+ write_mpbin_anomalous(&c,sharedsecret,buflen);
mpz_clear(&a);
mpz_clear(&b);