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tuning dh_make_key

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This commit is contained in:
Karel Miko 2017-06-11 21:12:14 +02:00
parent 361778d2ac
commit bc4236d90f
1 changed files with 2 additions and 3 deletions
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5
src/pk/dh/dh.c
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@ -119,7 +119,6 @@ int dh_make_key(prng_state *prng, int wprng, int groupsize, dh_key *key)
LTC_ARGCHK(key != NULL);
LTC_ARGCHK(prng != NULL);
LTC_ARGCHK(groupsize >= 32);
/* good prng? */
if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
@ -183,8 +182,8 @@ int dh_make_key(prng_state *prng, int wprng, int groupsize, dh_key *key)
if ((err = mp_read_unsigned_bin(key->x, buf, keysize)) != CRYPT_OK) { goto error; }
/* compute the y value - public key */
if ((err = mp_exptmod(g, key->x, p, key->y)) != CRYPT_OK) { goto error; }
/* avoid: y == 1 OR y == p-1 */
} while (mp_cmp(key->y, p_minus1) != LTC_MP_LT || mp_cmp_d(key->y, 1) != LTC_MP_GT);
/* avoid: y <= 1 OR y >= p-1 */
} while (mp_cmp(key->y, p_minus1) != LTC_MP_LT || mp_cmp_d(key->y, 1) != LTC_MP_GT);
/* success */
key->idx = idx;