mirror of
https://github.com/open62541/open62541.git
synced 2026-10-19 14:22:58 +08:00
Stefan Profanter
130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2019 (c) fortiss (Author: Stefan Profanter)
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*/
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#include "custom_memory_manager.h"
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#include <open62541/plugin/log_stdout.h>
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#include <open62541/server_config_default.h>
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#include <open62541/types.h>
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#include "ua_server_internal.h"
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#include "ua_types_encoding_binary.h"
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static UA_Boolean tortureEncoding(const uint8_t *data, size_t size, size_t *newOffset) {
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*newOffset = 0;
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if (size <= 2)
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return UA_FALSE;
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// get some random type
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uint16_t typeIndex = (uint16_t)(data[0] | data[1] << 8);
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data += 2;
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size -= 2;
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if (typeIndex >= UA_TYPES_COUNT)
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return UA_FALSE;
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void *dst = UA_new(&UA_TYPES[typeIndex]);
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if (!dst)
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return UA_FALSE;
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const UA_ByteString binary = {
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size, //length
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(UA_Byte *) (void *) data
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};
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UA_StatusCode ret = UA_decodeBinary(&binary, newOffset, dst, &UA_TYPES[typeIndex], NULL);
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if (ret == UA_STATUSCODE_GOOD) {
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// copy the datatype to test
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void *dstCopy = UA_new(&UA_TYPES[typeIndex]);
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if (!dstCopy)
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return UA_FALSE;
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UA_copy(dst, dstCopy, &UA_TYPES[typeIndex]);
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UA_delete(dstCopy, &UA_TYPES[typeIndex]);
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// now also test encoding
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UA_ByteString encoded;
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UA_ByteString_allocBuffer(&encoded, *newOffset);
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const UA_Byte *end = &encoded.data[*newOffset];
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UA_Byte *pos = encoded.data;
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ret = UA_encodeBinary(dst, &UA_TYPES[typeIndex], &pos, &end, NULL, NULL);
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if (ret == UA_STATUSCODE_GOOD) {
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// do nothing
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}
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UA_ByteString_deleteMembers(&encoded);
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}
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UA_delete(dst, &UA_TYPES[typeIndex]);
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return UA_TRUE;
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}
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static UA_Boolean tortureExtensionObject(const uint8_t *data, size_t size, size_t *newOffset) {
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*newOffset = 0;
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// check if there is still enough data to create an extension object
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// we need at least a nodeid.numeric which equals to 4 bytes
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if (size < 4)
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return UA_FALSE;
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UA_UInt32 identifier = (UA_UInt32)(data[0] | data[1] << 8 | data[2] << 16 | data[3] << 24);
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size-= 4;
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UA_NodeId objectId = UA_NODEID_NUMERIC(0, identifier);
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UA_ExtensionObject obj;
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UA_ExtensionObject_init(&obj);
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obj.encoding = UA_EXTENSIONOBJECT_ENCODED_BYTESTRING;
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obj.content.encoded.typeId = objectId;
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obj.content.encoded.body.length = size;
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obj.content.encoded.body.data = (UA_Byte*)(void*)data; // discard const. We are sure that we don't change it
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const UA_DataType *type = UA_findDataTypeByBinary(&obj.content.encoded.typeId);
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UA_StatusCode ret = UA_STATUSCODE_GOOD;
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if (type) {
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void *dstCopy = UA_new(type);
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if (!dstCopy)
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return UA_FALSE;
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ret = UA_decodeBinary(&obj.content.encoded.body, newOffset, dstCopy, type, NULL);
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if (ret == UA_STATUSCODE_GOOD) {
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UA_Variant var;
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UA_Variant_init(&var);
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UA_Variant_setScalar(&var, dstCopy, type);
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}
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UA_delete(dstCopy, type);
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}
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return ret==UA_STATUSCODE_GOOD;
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}
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/*
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** Main entry point. The fuzzer invokes this function with each
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** fuzzed input.
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*/
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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if (!UA_memoryManager_setLimitFromLast4Bytes(data, size))
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return 0;
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size -= 4;
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size_t offset;
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if (!tortureEncoding(data, size, &offset)) {
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return 0;
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}
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if (offset >= size)
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return 0;
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tortureExtensionObject(&data[offset], size-offset, &offset);
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return 0;
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}
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