github/chiaki
1
0
Fork 0
mirror of https://git.sr.ht/~thestr4ng3r/chiaki synced 2025-08-21 14:03:11 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

Start ECDH test

Browse source
This commit is contained in:
Florian Märkl 2018-11-26 16:44:48 +01:00
commit eaf88afd2d
No known key found for this signature in database
GPG key ID: 125BC8A5A6A1E857
5 changed files with 113 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

1
lib/include/chiaki/ecdh.h
View file

@ -37,6 +37,7 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_init(ChiakiECDH *ecdh);
CHIAKI_EXPORT void chiaki_ecdh_fini(ChiakiECDH *ecdh);
CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_get_local_pub_key(ChiakiECDH *ecdh, uint8_t *key_out, size_t *key_out_size, uint8_t *handshake_key, uint8_t *sig_out, size_t *sig_out_size);
CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_derive_secret(ChiakiECDH *ecdh, uint8_t *remote_key, size_t remote_key_size, uint8_t *handshake_key, uint8_t *remote_sig, size_t remote_sig_size);
CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_set_local_key(ChiakiECDH *ecdh, const uint8_t *private_key, size_t private_key_size, const uint8_t *public_key, size_t public_key_size);
#ifdef __cplusplus
}

42
lib/src/ecdh.c
View file

@ -52,6 +52,46 @@ CHIAKI_EXPORT void chiaki_ecdh_fini(ChiakiECDH *ecdh)
}
CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_set_local_key(ChiakiECDH *ecdh, const uint8_t *private_key, size_t private_key_size, const uint8_t *public_key, size_t public_key_size)
{
ChiakiErrorCode err = CHIAKI_ERR_SUCCESS;
BIGNUM *private_key_bn = BN_bin2bn(private_key, (int)private_key_size, NULL);
if(!private_key_bn)
return CHIAKI_ERR_UNKNOWN;
EC_POINT *public_key_point = EC_POINT_new(ecdh->group);
if(!public_key_point)
{
err = CHIAKI_ERR_UNKNOWN;
goto error_priv;
}
if(!EC_POINT_oct2point(ecdh->group, public_key_point, public_key, public_key_size, NULL))
{
err = CHIAKI_ERR_UNKNOWN;
goto error_pub;
}
if(!EC_KEY_set_private_key(ecdh->key_local, private_key_bn))
{
err = CHIAKI_ERR_UNKNOWN;
goto error_pub;
}
if(!EC_KEY_set_public_key(ecdh->key_local, public_key_point))
{
err = CHIAKI_ERR_UNKNOWN;
goto error_pub;
}
error_pub:
EC_POINT_free(public_key_point);
error_priv:
BN_free(private_key_bn);
return err;
}
CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_get_local_pub_key(ChiakiECDH *ecdh, uint8_t *key_out, size_t *key_out_size, uint8_t *handshake_key, uint8_t *sig_out, size_t *sig_out_size)
{
const EC_POINT *point = EC_KEY_get0_public_key(ecdh->key_local);
@ -65,6 +105,8 @@ CHIAKI_EXPORT ChiakiErrorCode chiaki_ecdh_get_local_pub_key(ChiakiECDH *ecdh, ui
if(!HMAC(EVP_sha256(), handshake_key, CHIAKI_HANDSHAKE_KEY_SIZE, key_out, *key_out_size, sig_out, (unsigned int *)sig_out_size))
return CHIAKI_ERR_UNKNOWN;
// TODO: set *sig_out_size?
return CHIAKI_ERR_SUCCESS;
}