UA-.NETStandard/fuzzing/Opc.Ua.Encoders.Fuzz/FuzzableCode.Parsers.cs

/* ========================================================================
 * Copyright (c) 2005-2026 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
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 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
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 *
 * The above copyright notice and this permission notice shall be
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 * OTHER DEALINGS IN THE SOFTWARE.
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using System;
using System.Text;

namespace Opc.Ua.Fuzzing
{
    /// <summary>
    /// Fuzzing code for OPC UA string parsers.
    /// </summary>
    public static partial class FuzzableCode
    {
        /// <summary>
        /// The NodeId parser fuzz target for afl-fuzz.
        /// </summary>
        public static void AflfuzzNodeIdParse(string input)
        {
            FuzzParser(() => _ = NodeId.Parse(input));
        }

        /// <summary>
        /// The NodeId parser fuzz target for libfuzzer.
        /// </summary>
        public static void LibfuzzNodeIdParse(ReadOnlySpan<byte> input)
        {
            AflfuzzNodeIdParse(ToUtf8String(input));
        }

        /// <summary>
        /// The ExpandedNodeId parser fuzz target for afl-fuzz.
        /// </summary>
        public static void AflfuzzExpandedNodeIdParse(string input)
        {
            FuzzParser(() => _ = ExpandedNodeId.Parse(input));
        }

        /// <summary>
        /// The ExpandedNodeId parser fuzz target for libfuzzer.
        /// </summary>
        public static void LibfuzzExpandedNodeIdParse(ReadOnlySpan<byte> input)
        {
            AflfuzzExpandedNodeIdParse(ToUtf8String(input));
        }

        /// <summary>
        /// The RelativePathFormatter parser fuzz target for afl-fuzz.
        /// </summary>
        public static void AflfuzzRelativePathFormatterParse(string input)
        {
            FuzzParser(() => _ = RelativePathFormatter.Parse(input));
        }

        /// <summary>
        /// The RelativePathFormatter parser fuzz target for libfuzzer.
        /// </summary>
        public static void LibfuzzRelativePathFormatterParse(ReadOnlySpan<byte> input)
        {
            AflfuzzRelativePathFormatterParse(ToUtf8String(input));
        }

        /// <summary>
        /// The QualifiedName parser fuzz target for afl-fuzz.
        /// </summary>
        public static void AflfuzzQualifiedNameParse(string input)
        {
            FuzzParser(() => _ = QualifiedName.Parse(input));
        }

        /// <summary>
        /// The QualifiedName parser fuzz target for libfuzzer.
        /// </summary>
        public static void LibfuzzQualifiedNameParse(ReadOnlySpan<byte> input)
        {
            AflfuzzQualifiedNameParse(ToUtf8String(input));
        }

        /// <summary>
        /// The NumericRange parser fuzz target for afl-fuzz.
        /// </summary>
        public static void AflfuzzNumericRangeParse(string input)
        {
            FuzzParser(() => _ = NumericRange.Parse(input));
        }

        /// <summary>
        /// The NumericRange parser fuzz target for libfuzzer.
        /// </summary>
        public static void LibfuzzNumericRangeParse(ReadOnlySpan<byte> input)
        {
            AflfuzzNumericRangeParse(ToUtf8String(input));
        }

        /// <summary>
        /// The Uuid round-trip fuzz target for afl-fuzz.
        /// </summary>
        public static void AflfuzzUuidRoundTrip(string input)
        {
            FuzzParser(() =>
            {
                var uuid = Uuid.Parse(input);
                var roundTripped = Uuid.Parse(uuid.ToString());
                if (!uuid.Equals(roundTripped))
                {
                    throw new InvalidOperationException("Uuid round-trip failed.");
                }
            });
        }

        /// <summary>
        /// The Uuid round-trip fuzz target for libfuzzer.
        /// </summary>
        public static void LibfuzzUuidRoundTrip(ReadOnlySpan<byte> input)
        {
            AflfuzzUuidRoundTrip(ToUtf8String(input));
        }

        private static void FuzzParser(Action parse)
        {
            try
            {
                parse();
            }
            catch (ServiceResultException)
            {
            }
            catch (FormatException)
            {
            }
            catch (ArgumentException)
            {
            }
        }

        private static string ToUtf8String(ReadOnlySpan<byte> input)
        {
#if NETFRAMEWORK
            return Encoding.UTF8.GetString(input.ToArray());
#else
            return Encoding.UTF8.GetString(input);
#endif
        }
    }
}