| /* |
| * Copyright 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 <keyguard/keyguard_messages.h> |
| |
| #include <string.h> |
| |
| |
| namespace keyguard { |
| |
| /** |
| * Methods for serializing/deserializing SizedBuffers |
| */ |
| |
| static inline size_t serialized_buffer_size(const SizedBuffer &buf) { |
| return sizeof(uint32_t) + buf.length; |
| } |
| |
| static inline void append_to_buffer(uint8_t **buffer, const SizedBuffer *to_append) { |
| memcpy(*buffer, &to_append->length, sizeof(to_append->length)); |
| *buffer += sizeof(to_append->length); |
| if (to_append->length != 0) { |
| memcpy(*buffer, to_append->buffer.get(), to_append->length); |
| *buffer += to_append->length; |
| } |
| } |
| |
| static inline keyguard_error_t read_from_buffer(const uint8_t **buffer, const uint8_t *end, |
| SizedBuffer *target) { |
| if (*buffer + sizeof(target->length) > end) return KG_ERROR_INVALID; |
| |
| memcpy(&target->length, *buffer, sizeof(target->length)); |
| *buffer += sizeof(target->length); |
| if (target->length != 0) { |
| const uint8_t *buffer_end = *buffer + target->length; |
| if (buffer_end > end || buffer_end <= *buffer) return KG_ERROR_INVALID; |
| |
| target->buffer.reset(new uint8_t[target->length]); |
| memcpy(target->buffer.get(), *buffer, target->length); |
| *buffer += target->length; |
| } |
| return KG_ERROR_OK; |
| } |
| |
| |
| size_t KeyguardMessage::GetSerializedSize() const { |
| if (error == KG_ERROR_OK) { |
| return 2 * sizeof(uint32_t) + nonErrorSerializedSize(); |
| } else { |
| return sizeof(uint32_t); |
| } |
| } |
| |
| uint8_t *KeyguardMessage::Serialize() const { |
| if (error != KG_ERROR_OK) { |
| uint32_t *error_buf = new uint32_t; |
| *error_buf = static_cast<uint32_t>(error); |
| return reinterpret_cast<uint8_t *>(error_buf); |
| } else { |
| uint8_t *buf = new uint8_t[2*sizeof(uint32_t) + nonErrorSerializedSize()]; |
| uint32_t error_value = static_cast<uint32_t>(error); |
| memcpy(buf, &error_value, sizeof(uint32_t)); |
| memcpy(buf + sizeof(uint32_t), &user_id, sizeof(user_id)); |
| nonErrorSerialize(buf + 2*sizeof(uint32_t)); |
| return buf; |
| } |
| } |
| |
| keyguard_error_t KeyguardMessage::Deserialize(const uint8_t *payload, const uint8_t *end) { |
| uint32_t error_value; |
| if (payload + sizeof(uint32_t) > end) return KG_ERROR_INVALID; |
| memcpy(&error_value, payload, sizeof(uint32_t)); |
| error = static_cast<keyguard_error_t>(error_value); |
| payload += sizeof(uint32_t); |
| if (error == KG_ERROR_OK) { |
| if (payload == end) return KG_ERROR_INVALID; |
| user_id = *((uint32_t *) payload); |
| error = nonErrorDeserialize(payload + sizeof(uint32_t), end); |
| } |
| |
| return error; |
| } |
| |
| |
| VerifyRequest::VerifyRequest(uint32_t user_id, SizedBuffer *enrolled_password_handle, |
| SizedBuffer *provided_password_payload) { |
| this->user_id = user_id; |
| this->password_handle.buffer.reset(enrolled_password_handle->buffer.release()); |
| this->password_handle.length = enrolled_password_handle->length; |
| this->provided_password.buffer.reset(provided_password_payload->buffer.release()); |
| this->provided_password.length = provided_password_payload->length; |
| } |
| |
| VerifyRequest::VerifyRequest() { |
| memset_s(&password_handle, 0, sizeof(password_handle)); |
| memset_s(&provided_password, 0, sizeof(provided_password)); |
| } |
| |
| VerifyRequest::~VerifyRequest() { |
| if (password_handle.buffer.get()) { |
| password_handle.buffer.reset(); |
| } |
| |
| if (provided_password.buffer.get()) { |
| memset_s(provided_password.buffer.get(), 0, provided_password.length); |
| provided_password.buffer.reset(); |
| } |
| } |
| |
| size_t VerifyRequest::nonErrorSerializedSize() const { |
| return serialized_buffer_size(password_handle) + serialized_buffer_size(provided_password); |
| } |
| |
| void VerifyRequest::nonErrorSerialize(uint8_t *buffer) const { |
| append_to_buffer(&buffer, &password_handle); |
| append_to_buffer(&buffer, &provided_password); |
| } |
| |
| keyguard_error_t VerifyRequest::nonErrorDeserialize(const uint8_t *payload, const uint8_t *end) { |
| keyguard_error_t error = KG_ERROR_OK; |
| |
| if (password_handle.buffer.get()) { |
| password_handle.buffer.reset(); |
| } |
| |
| if (provided_password.buffer.get()) { |
| memset_s(provided_password.buffer.get(), 0, provided_password.length); |
| provided_password.buffer.reset(); |
| } |
| |
| error = read_from_buffer(&payload, end, &password_handle); |
| if (error != KG_ERROR_OK) return error; |
| |
| return read_from_buffer(&payload, end, &provided_password); |
| |
| } |
| |
| VerifyResponse::VerifyResponse(uint32_t user_id, SizedBuffer *auth_token) { |
| this->user_id = user_id; |
| this->auth_token.buffer.reset(auth_token->buffer.release()); |
| this->auth_token.length = auth_token->length; |
| } |
| |
| VerifyResponse::VerifyResponse() { |
| memset_s(&auth_token, 0, sizeof(auth_token)); |
| }; |
| |
| VerifyResponse::~VerifyResponse() { |
| if (auth_token.length > 0) { |
| auth_token.buffer.reset(); |
| } |
| } |
| |
| void VerifyResponse::SetVerificationToken(SizedBuffer *auth_token) { |
| this->auth_token.buffer.reset(auth_token->buffer.release()); |
| this->auth_token.length = auth_token->length; |
| } |
| |
| size_t VerifyResponse::nonErrorSerializedSize() const { |
| return serialized_buffer_size(auth_token); |
| } |
| |
| void VerifyResponse::nonErrorSerialize(uint8_t *buffer) const { |
| append_to_buffer(&buffer, &auth_token); |
| } |
| |
| keyguard_error_t VerifyResponse::nonErrorDeserialize(const uint8_t *payload, const uint8_t *end) { |
| if (auth_token.buffer.get()) { |
| auth_token.buffer.reset(); |
| } |
| |
| return read_from_buffer(&payload, end, &auth_token); |
| } |
| |
| EnrollRequest::EnrollRequest(uint32_t user_id, SizedBuffer *password_handle, |
| SizedBuffer *provided_password, SizedBuffer *enrolled_password) { |
| this->user_id = user_id; |
| this->provided_password.buffer.reset(provided_password->buffer.release()); |
| this->provided_password.length = provided_password->length; |
| |
| if (enrolled_password == NULL) { |
| this->enrolled_password.buffer.reset(); |
| this->enrolled_password.length = 0; |
| } else { |
| this->enrolled_password.buffer.reset(enrolled_password->buffer.release()); |
| this->enrolled_password.length = enrolled_password->length; |
| } |
| |
| if (password_handle == NULL) { |
| this->password_handle.buffer.reset(); |
| this->password_handle.length = 0; |
| } else { |
| this->password_handle.buffer.reset(password_handle->buffer.release()); |
| this->password_handle.length = password_handle->length; |
| } |
| } |
| |
| EnrollRequest::EnrollRequest() { |
| memset_s(&provided_password, 0, sizeof(provided_password)); |
| memset_s(&enrolled_password, 0, sizeof(enrolled_password)); |
| memset_s(&password_handle, 0, sizeof(password_handle)); |
| } |
| |
| EnrollRequest::~EnrollRequest() { |
| if (provided_password.buffer.get()) { |
| memset_s(provided_password.buffer.get(), 0, provided_password.length); |
| provided_password.buffer.reset(); |
| } |
| |
| if (enrolled_password.buffer.get()) { |
| memset_s(enrolled_password.buffer.get(), 0, enrolled_password.length); |
| enrolled_password.buffer.reset(); |
| } |
| |
| if (password_handle.buffer.get()) { |
| memset_s(password_handle.buffer.get(), 0, password_handle.length); |
| password_handle.buffer.reset(); |
| } |
| } |
| |
| size_t EnrollRequest::nonErrorSerializedSize() const { |
| return serialized_buffer_size(provided_password) + serialized_buffer_size(enrolled_password) |
| + serialized_buffer_size(password_handle); |
| } |
| |
| void EnrollRequest::nonErrorSerialize(uint8_t *buffer) const { |
| append_to_buffer(&buffer, &provided_password); |
| append_to_buffer(&buffer, &enrolled_password); |
| append_to_buffer(&buffer, &password_handle); |
| } |
| |
| keyguard_error_t EnrollRequest::nonErrorDeserialize(const uint8_t *payload, const uint8_t *end) { |
| keyguard_error_t ret; |
| if (provided_password.buffer.get()) { |
| memset_s(provided_password.buffer.get(), 0, provided_password.length); |
| provided_password.buffer.reset(); |
| } |
| |
| if (enrolled_password.buffer.get()) { |
| memset_s(enrolled_password.buffer.get(), 0, enrolled_password.length); |
| enrolled_password.buffer.reset(); |
| } |
| |
| if (password_handle.buffer.get()) { |
| memset_s(password_handle.buffer.get(), 0, password_handle.length); |
| password_handle.buffer.reset(); |
| } |
| |
| ret = read_from_buffer(&payload, end, &provided_password); |
| if (ret != KG_ERROR_OK) { |
| return ret; |
| } |
| |
| ret = read_from_buffer(&payload, end, &enrolled_password); |
| if (ret != KG_ERROR_OK) { |
| return ret; |
| } |
| |
| return read_from_buffer(&payload, end, &password_handle); |
| } |
| |
| EnrollResponse::EnrollResponse(uint32_t user_id, SizedBuffer *enrolled_password_handle) { |
| this->user_id = user_id; |
| this->enrolled_password_handle.buffer.reset(enrolled_password_handle->buffer.release()); |
| this->enrolled_password_handle.length = enrolled_password_handle->length; |
| } |
| |
| EnrollResponse::EnrollResponse() { |
| memset_s(&enrolled_password_handle, 0, sizeof(enrolled_password_handle)); |
| } |
| |
| EnrollResponse::~EnrollResponse() { |
| if (enrolled_password_handle.buffer.get()) { |
| enrolled_password_handle.buffer.reset(); |
| } |
| } |
| |
| void EnrollResponse::SetEnrolledPasswordHandle(SizedBuffer *enrolled_password_handle) { |
| this->enrolled_password_handle.buffer.reset(enrolled_password_handle->buffer.release()); |
| this->enrolled_password_handle.length = enrolled_password_handle->length; |
| } |
| |
| size_t EnrollResponse::nonErrorSerializedSize() const { |
| return serialized_buffer_size(enrolled_password_handle); |
| } |
| |
| void EnrollResponse::nonErrorSerialize(uint8_t *buffer) const { |
| append_to_buffer(&buffer, &enrolled_password_handle); |
| } |
| |
| keyguard_error_t EnrollResponse::nonErrorDeserialize(const uint8_t *payload, const uint8_t *end) { |
| if (enrolled_password_handle.buffer.get()) { |
| enrolled_password_handle.buffer.reset(); |
| } |
| |
| return read_from_buffer(&payload, end, &enrolled_password_handle); |
| } |
| |
| }; |
| |