- /* If field size is not more than 24 octets, then use SHA-1 hash of result;
- * otherwise, use result (see section 4.8 of draft-ietf-tls-ecc-03.txt).
- */
- int field_size, outlen;
- void *(*kdf)(void *in, size_t inlen, void *out, size_t xoutlen);
- field_size = EC_GROUP_get_degree(ecdh_a[j]->group);
- if (field_size <= 24 * 8)
- {
- outlen = KDF1_SHA1_len;
- kdf = KDF1_SHA1;
- }
- else
- {
- outlen = (field_size+7)/8;
- kdf = NULL;
- }
- secret_size_a = ECDH_compute_key(secret_a, outlen,
- ecdh_b[j]->pub_key,
- ecdh_a[j], kdf);
- secret_size_b = ECDH_compute_key(secret_b, outlen,
- ecdh_a[j]->pub_key,
- ecdh_b[j], kdf);
- if (secret_size_a != secret_size_b)
- ecdh_checks = 0;
- else
- ecdh_checks = 1;
-
- for (secret_idx = 0;
- (secret_idx < secret_size_a)
- && (ecdh_checks == 1);
- secret_idx++)
- {
- if (secret_a[secret_idx] != secret_b[secret_idx])
- ecdh_checks = 0;
- }
+ outlen = (field_size+7)/8;
+ kdf = NULL;
+ }
+ secret_size_a = ECDH_compute_key(secret_a, outlen,
+ EC_KEY_get0_public_key(ecdh_b[j]),
+ ecdh_a[j], kdf);
+ secret_size_b = ECDH_compute_key(secret_b, outlen,
+ EC_KEY_get0_public_key(ecdh_a[j]),
+ ecdh_b[j], kdf);
+ if (secret_size_a != secret_size_b)
+ ecdh_checks = 0;
+ else
+ ecdh_checks = 1;