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BoringSSL: Implement crypto_ecdh_init()

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BoringSSL does not provide some of the OpenSSL API that was used here,
so update this to use similar design to what was already done with DPP
key derivation.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2017-11-17 20:41:25 +02:00 committed by Jouni Malinen
parent 7721fe082b
commit f29761297b
1 changed files with 24 additions and 0 deletions
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24
src/crypto/crypto_openssl.c
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@ -1701,7 +1701,12 @@ struct crypto_ecdh * crypto_ecdh_init(int group)
{
struct crypto_ecdh *ecdh;
EVP_PKEY *params = NULL;
#ifdef OPENSSL_IS_BORINGSSL
const EC_GROUP *ec_group;
EC_KEY *ec_params;
#else /* OPENSSL_IS_BORINGSSL */
EVP_PKEY_CTX *pctx = NULL;
#endif /* OPENSSL_IS_BORINGSSL */
EVP_PKEY_CTX *kctx = NULL;
ecdh = os_zalloc(sizeof(*ecdh));
@ -1712,6 +1717,22 @@ struct crypto_ecdh * crypto_ecdh_init(int group)
if (!ecdh->ec)
goto fail;
#ifdef OPENSSL_IS_BORINGSSL
ec_group = EC_GROUP_new_by_curve_name(ecdh->ec->nid);
ec_params = EC_KEY_new();
if (!ec_params || EC_KEY_set_group(ec_params, ec_group) != 1) {
wpa_printf(MSG_ERROR,
"BoringSSL: Failed to generate EC_KEY parameters");
goto fail;
}
EC_KEY_set_asn1_flag(ec_params, OPENSSL_EC_NAMED_CURVE);
params = EVP_PKEY_new();
if (!params || EVP_PKEY_set1_EC_KEY(params, ec_params) != 1) {
wpa_printf(MSG_ERROR,
"BoringSSL: Failed to generate EVP_PKEY parameters");
goto fail;
}
#else /* OPENSSL_IS_BORINGSSL */
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
if (!pctx)
goto fail;
@ -1735,6 +1756,7 @@ struct crypto_ecdh * crypto_ecdh_init(int group)
ERR_error_string(ERR_get_error(), NULL));
goto fail;
}
#endif /* OPENSSL_IS_BORINGSSL */
kctx = EVP_PKEY_CTX_new(params, NULL);
if (!kctx)
@ -1755,7 +1777,9 @@ struct crypto_ecdh * crypto_ecdh_init(int group)
done:
EVP_PKEY_free(params);
#ifndef OPENSSL_IS_BORINGSSL
EVP_PKEY_CTX_free(pctx);
#endif /* OPENSSL_IS_BORINGSSL */
EVP_PKEY_CTX_free(kctx);
return ecdh;