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/*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <keymaster/asymmetric_key_factory.h>
#include <utility>
#include <keymaster/android_keymaster_utils.h>
#include <keymaster/km_openssl/asymmetric_key.h>
#include <keymaster/km_openssl/openssl_err.h>
#include <keymaster/km_openssl/openssl_utils.h>
namespace keymaster {
static const keymaster_key_format_t supported_import_formats[] = {KM_KEY_FORMAT_PKCS8};
const keymaster_key_format_t*
AsymmetricKeyFactory::SupportedImportFormats(size_t* format_count) const {
*format_count = array_length(supported_import_formats);
return supported_import_formats;
}
static const keymaster_key_format_t supported_export_formats[] = {KM_KEY_FORMAT_X509};
const keymaster_key_format_t*
AsymmetricKeyFactory::SupportedExportFormats(size_t* format_count) const {
*format_count = array_length(supported_export_formats);
return supported_export_formats;
}
keymaster_error_t AsymmetricKeyFactory::LoadKey(KeymasterKeyBlob&& key_material,
const AuthorizationSet& /* additional_params */,
AuthorizationSet&& hw_enforced,
AuthorizationSet&& sw_enforced,
UniquePtr<Key>* key) const {
UniquePtr<AsymmetricKey> asym_key;
keymaster_error_t error = CreateEmptyKey(std::move(hw_enforced), std::move(sw_enforced),
&asym_key);
if (error != KM_ERROR_OK) return error;
const uint8_t* tmp = key_material.key_material;
asym_key->key_material() = std::move(key_material);
EVP_PKEY* pkey = d2i_PrivateKey(asym_key->evp_key_type(), nullptr /* pkey */, &tmp,
asym_key->key_material().key_material_size);
if (!pkey) return TranslateLastOpenSslError();
UniquePtr<EVP_PKEY, EVP_PKEY_Delete> pkey_deleter(pkey);
if (!asym_key->EvpToInternal(pkey)) {
error = TranslateLastOpenSslError();
} else {
*key = std::move(asym_key);
}
return error;
}
} // namespace keymaster
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