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98 lines
3.1 KiB
C++
98 lines
3.1 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "mojo/public/cpp/bindings/lib/validation_util.h"
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#include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
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#include "mojo/public/cpp/bindings/lib/message_internal.h"
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#include "mojo/public/cpp/bindings/lib/validation_errors.h"
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#include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
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namespace mojo {
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namespace internal {
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bool ValidateEncodedPointer(const uint64_t* offset) {
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// Cast to uintptr_t so overflow behavior is well defined.
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return reinterpret_cast<uintptr_t>(offset) + *offset >=
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reinterpret_cast<uintptr_t>(offset);
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}
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bool ValidateStructHeaderAndClaimMemory(const void* data,
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BoundsChecker* bounds_checker) {
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if (!IsAligned(data)) {
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ReportValidationError(VALIDATION_ERROR_MISALIGNED_OBJECT);
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return false;
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}
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if (!bounds_checker->IsValidRange(data, sizeof(StructHeader))) {
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ReportValidationError(VALIDATION_ERROR_ILLEGAL_MEMORY_RANGE);
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return false;
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}
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const StructHeader* header = static_cast<const StructHeader*>(data);
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if (header->num_bytes < sizeof(StructHeader)) {
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ReportValidationError(VALIDATION_ERROR_UNEXPECTED_STRUCT_HEADER);
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return false;
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}
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if (!bounds_checker->ClaimMemory(data, header->num_bytes)) {
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ReportValidationError(VALIDATION_ERROR_ILLEGAL_MEMORY_RANGE);
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return false;
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}
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return true;
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}
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bool ValidateMessageIsRequestWithoutResponse(const Message* message) {
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if (message->has_flag(kMessageIsResponse) ||
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message->has_flag(kMessageExpectsResponse)) {
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ReportValidationError(VALIDATION_ERROR_MESSAGE_HEADER_INVALID_FLAGS);
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return false;
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}
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return true;
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}
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bool ValidateMessageIsRequestExpectingResponse(const Message* message) {
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if (message->has_flag(kMessageIsResponse) ||
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!message->has_flag(kMessageExpectsResponse)) {
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ReportValidationError(VALIDATION_ERROR_MESSAGE_HEADER_INVALID_FLAGS);
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return false;
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}
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return true;
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}
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bool ValidateMessageIsResponse(const Message* message) {
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if (message->has_flag(kMessageExpectsResponse) ||
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!message->has_flag(kMessageIsResponse)) {
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ReportValidationError(VALIDATION_ERROR_MESSAGE_HEADER_INVALID_FLAGS);
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return false;
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}
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return true;
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}
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bool ValidateControlRequest(const Message* message) {
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switch (message->header()->name) {
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case kRunMessageId:
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return ValidateMessageIsRequestExpectingResponse(message) &&
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ValidateMessagePayload<RunMessageParams_Data>(message);
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case kRunOrClosePipeMessageId:
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return ValidateMessageIsRequestWithoutResponse(message) &&
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ValidateMessagePayload<RunOrClosePipeMessageParams_Data>(message);
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}
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return false;
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}
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bool ValidateControlResponse(const Message* message) {
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if (!ValidateMessageIsResponse(message))
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return false;
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switch (message->header()->name) {
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case kRunMessageId:
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return ValidateMessagePayload<RunResponseMessageParams_Data>(message);
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}
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return false;
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}
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} // namespace internal
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} // namespace mojo
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