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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 "asymmetric_key.h"
#include <new>
#include <openssl/x509.h>
#include "openssl_err.h"
#include "openssl_utils.h"
namespace keymaster {
keymaster_error_t AsymmetricKey::key_material(UniquePtr<uint8_t[]>* material, size_t* size) const {
if (material == NULL || size == NULL)
return KM_ERROR_OUTPUT_PARAMETER_NULL;
UniquePtr<EVP_PKEY, EVP_PKEY_Delete> pkey(EVP_PKEY_new());
if (pkey.get() == NULL)
return KM_ERROR_MEMORY_ALLOCATION_FAILED;
if (!InternalToEvp(pkey.get()))
return TranslateLastOpenSslError();
*size = i2d_PrivateKey(pkey.get(), NULL /* key_data*/);
if (*size <= 0)
return TranslateLastOpenSslError();
material->reset(new (std::nothrow) uint8_t[*size]);
uint8_t* tmp = material->get();
i2d_PrivateKey(pkey.get(), &tmp);
return KM_ERROR_OK;
}
keymaster_error_t AsymmetricKey::formatted_key_material(keymaster_key_format_t format,
UniquePtr<uint8_t[]>* material,
size_t* size) const {
if (format != KM_KEY_FORMAT_X509)
return KM_ERROR_UNSUPPORTED_KEY_FORMAT;
if (material == NULL || size == NULL)
return KM_ERROR_OUTPUT_PARAMETER_NULL;
UniquePtr<EVP_PKEY, EVP_PKEY_Delete> pkey(EVP_PKEY_new());
if (!InternalToEvp(pkey.get()))
return TranslateLastOpenSslError();
int key_data_length = i2d_PUBKEY(pkey.get(), NULL);
if (key_data_length <= 0)
return TranslateLastOpenSslError();
material->reset(new (std::nothrow) uint8_t[key_data_length]);
if (material->get() == NULL)
return KM_ERROR_MEMORY_ALLOCATION_FAILED;
uint8_t* tmp = material->get();
if (i2d_PUBKEY(pkey.get(), &tmp) != key_data_length) {
material->reset();
return TranslateLastOpenSslError();
}
*size = key_data_length;
return KM_ERROR_OK;
}
} // namespace keymaster
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