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/*
* Copyright (C) 2015 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 "SoftGateKeeper.h"
#include "SoftGateKeeperDevice.h"
namespace android {
int SoftGateKeeperDevice::enroll(uint32_t uid,
const uint8_t *current_password_handle, uint32_t current_password_handle_length,
const uint8_t *current_password, uint32_t current_password_length,
const uint8_t *desired_password, uint32_t desired_password_length,
uint8_t **enrolled_password_handle, uint32_t *enrolled_password_handle_length) {
if (enrolled_password_handle == NULL || enrolled_password_handle_length == NULL ||
desired_password == NULL || desired_password_length == 0)
return -EINVAL;
// Current password and current password handle go together
if (current_password_handle == NULL || current_password_handle_length == 0 ||
current_password == NULL || current_password_length == 0) {
current_password_handle = NULL;
current_password_handle_length = 0;
current_password = NULL;
current_password_length = 0;
}
SizedBuffer desired_password_buffer(desired_password_length);
memcpy(desired_password_buffer.buffer.get(), desired_password, desired_password_length);
SizedBuffer current_password_handle_buffer(current_password_handle_length);
if (current_password_handle) {
memcpy(current_password_handle_buffer.buffer.get(), current_password_handle,
current_password_handle_length);
}
SizedBuffer current_password_buffer(current_password_length);
if (current_password) {
memcpy(current_password_buffer.buffer.get(), current_password, current_password_length);
}
EnrollRequest request(uid, ¤t_password_handle_buffer, &desired_password_buffer,
¤t_password_buffer);
EnrollResponse response;
impl_->Enroll(request, &response);
if (response.error == ERROR_RETRY) {
return response.retry_timeout;
} else if (response.error != ERROR_NONE) {
return -EINVAL;
}
*enrolled_password_handle = response.enrolled_password_handle.buffer.release();
*enrolled_password_handle_length = response.enrolled_password_handle.length;
return 0;
}
int SoftGateKeeperDevice::verify(uint32_t uid,
uint64_t challenge, const uint8_t *enrolled_password_handle,
uint32_t enrolled_password_handle_length, const uint8_t *provided_password,
uint32_t provided_password_length, uint8_t **auth_token, uint32_t *auth_token_length,
bool *request_reenroll) {
if (enrolled_password_handle == NULL ||
provided_password == NULL) {
return -EINVAL;
}
SizedBuffer password_handle_buffer(enrolled_password_handle_length);
memcpy(password_handle_buffer.buffer.get(), enrolled_password_handle,
enrolled_password_handle_length);
SizedBuffer provided_password_buffer(provided_password_length);
memcpy(provided_password_buffer.buffer.get(), provided_password, provided_password_length);
VerifyRequest request(uid, challenge, &password_handle_buffer, &provided_password_buffer);
VerifyResponse response;
impl_->Verify(request, &response);
if (response.error == ERROR_RETRY) {
return response.retry_timeout;
} else if (response.error != ERROR_NONE) {
return -EINVAL;
}
if (auth_token != NULL && auth_token_length != NULL) {
*auth_token = response.auth_token.buffer.release();
*auth_token_length = response.auth_token.length;
}
if (request_reenroll != NULL) {
*request_reenroll = response.request_reenroll;
}
return 0;
}
} // namespace android
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