Initial version

.github/workflows/pr-checks.yml

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+# Copyright (c) .NET Foundation and Contributors
+# See LICENSE file in the project root for full license information.
+
+name: PR Checks
+
+on:
+  pull_request:
+
+jobs:
+  check_package_lock:
+    name: nanoFramework
+    uses: nanoframework/nf-tools/.github/workflows/check-package-lock.yml@main
+  check_nuget_latest:
+    name: nanoFramework
+    uses: nanoframework/nf-tools/.github/workflows/check-packages-updated.yml@main
+    secrets: inherit
+    with:
+      solution: 'nanoFramework.System.IO.Hashing.sln'

.github/workflows/update-dependencies.yml

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+# Copyright (c) .NET Foundation and Contributors
+# See LICENSE file in the project root for full license information.
+
+# This workflow will periodically check .NET nanoFramework dependencies and updates them in the repository it's running.
+
+name: Daily update dependencies
+
+on:
+  schedule:
+  # At 00:10 UTC.
+  - cron:  '00 10 * * Mon,Thu'
+  repository_dispatch:
+    types: update-dependencies
+
+jobs:
+  update-dependencies:
+    name: nanoFramework
+    uses: nanoframework/nf-tools/.github/workflows/update-dependencies.yml@main
+    secrets: inherit
+    with:
+      solutionsToCheck: 'nanoFramework.System.IO.Hashing.sln'

.github_changelog_generator

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+user=nanoframework
+project=nanoFramework.System.IO.Hashing
+issues=true
+add_issues_wo_labels=false
+add_pr_wo_labels=false
+add_issues_wo_labels=false
+filter_issues_by_milestone=false
+exclude_labels=Area: Config-and-Build,Area: Infrastructure-and-Organization,reverted
+enhancement_labels=Type: enhancement
+bug_labels=Type: bug
+merge_prefix=**Documentation and other chores:**
+unreleased_label=**Changes available only in 'Preview' NuGet packages:**
+author=false

.runsettings

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+<?xml version="1.0" encoding="utf-8"?>
+<RunSettings>
+   <!-- Configurations that affect the Test Framework -->
+   <RunConfiguration>
+       <ResultsDirectory>.\TestResults</ResultsDirectory><!-- Path relative to solution directory -->
+       <TestSessionTimeout>120000</TestSessionTimeout><!-- Milliseconds -->
+       <TargetFrameworkVersion>net48</TargetFrameworkVersion>
+       <TargetPlatform>x64</TargetPlatform>
+   </RunConfiguration>
+   <nanoFrameworkAdapter>
+       <Logging>None</Logging> <!--Set to the desired level of logging for Unit Test execution. Possible values are: None, Detailed, Verbose, Error. -->
+       <IsRealHardware>True</IsRealHardware><!--Set to true to run tests on real hardware. -->
+       <RealHardwarePort>COM15</RealHardwarePort><!--Specify the COM port to use to connect to a nanoDevice. If none is specified, a device detection is performed and the 1st available one will be used. -->
+       <CLRVersion></CLRVersion><!--Specify the nanoCLR version to use. If not specified, the latest available will be used. -->
+       <PathToLocalCLRInstance></PathToLocalCLRInstance><!--Specify the path to a local nanoCLR instance. If not specified, the default one installed with nanoclr CLR witll be used. -->
+   </nanoFrameworkAdapter>
+</RunSettings>

LICENSE.md

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+MIT License
+
+Copyright (c) .NET Foundation and Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

NuGet.Config

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <packageSources>
+        <add key="NuGet" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+        <add key="Azure Artifacts nanoFramework dev" value="https://pkgs.dev.azure.com/nanoframework/feed/_packaging/sandbox/nuget/v3/index.json" protocolVersion="3" />
+    </packageSources>
+</configuration>

README.md

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+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=nanoframework_System.IO.Hashing&metric=alert_status)](https://sonarcloud.io/dashboard?id=nanoframework_System.IO.Hashing) [![Reliability Rating](https://sonarcloud.io/api/project_badges/measure?project=nanoframework_System.IO.Hashing&metric=reliability_rating)](https://sonarcloud.io/dashboard?id=nanoframework_System.IO.Hashing) [![NuGet](https://img.shields.io/nuget/dt/nanoFramework.System.IO.Hashing.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.System.IO.Hashing/) [![#yourfirstpr](https://img.shields.io/badge/first--timers--only-friendly-blue.svg)](https://github.com/nanoframework/Home/blob/main/CONTRIBUTING.md) [![Discord](https://img.shields.io/discord/478725473862549535.svg?logo=discord&logoColor=white&label=Discord&color=7289DA)](https://discord.gg/gCyBu8T)
+
+![nanoFramework logo](https://raw.githubusercontent.com/nanoframework/Home/main/resources/logo/nanoFramework-repo-logo.png)
+
+-----
+
+### Welcome to the .NET **nanoFramework** System.IO.Hashing Library repository
+
+This repository contains the nanoFramework System.IO.Hashing class library.
+
+## Build status
+
+| Component | Build Status | NuGet Package |
+|:-|---|---|
+| System.IO.Hashing | [![Build Status](https://dev.azure.com/nanoframework/System.IO.Hashing/_apis/build/status%2Fnanoframework.System.IO.Hashing?branchName=main)](https://dev.azure.com/nanoframework/System.IO.Hashing/_build/latest?definitionId=102&branchName=main) | [![NuGet](https://img.shields.io/nuget/v/nanoFramework.System.IO.Hashing.svg?label=NuGet&style=flat&logo=nuget)](https://www.nuget.org/packages/nanoFramework.System.IO.Hashing/) |
+
+## System.IO.Hashing usage
+
+## Feedback and documentation
+
+For documentation, providing feedback, issues and finding out how to contribute please refer to the [Home repo](https://github.com/nanoframework/Home).
+
+Join our Discord community [here](https://discord.gg/gCyBu8T).
+
+## Credits
+
+The list of contributors to this project can be found at [CONTRIBUTORS](https://github.com/nanoframework/Home/blob/main/CONTRIBUTORS.md).
+
+## License
+
+The **nanoFramework** Class Libraries are licensed under the [MIT license](LICENSE.md).
+
+## Code of Conduct
+
+This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behaviour in our community.
+For more information see the [.NET Foundation Code of Conduct](https://dotnetfoundation.org/code-of-conduct).
+
+### .NET Foundation
+
+This project is supported by the [.NET Foundation](https://dotnetfoundation.org).

System.IO.Hashing/Crc32.cs

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+//
+// Copyright (c) .NET Foundation and Contributors
+// Portions Copyright (c) Microsoft Corporation.  All rights reserved.
+// See LICENSE file in the project root for full license information.
+//
+
+using System.Runtime.CompilerServices;
+
+namespace System.IO.Hashing
+{
+    /// <summary>
+    ///   Provides an implementation of the CRC-32 algorithm, as used in
+    ///   ITU-T V.42 and IEEE 802.3.
+    /// </summary>
+    /// <remarks>
+    ///   <para>
+    ///     If the platform or target doesn't support Hardware Crc32 computation it will offer a software implementation.
+    ///   </para>
+    ///   <para>
+    ///     For methods that return byte arrays or that write into spans of bytes, this implementation
+    ///     emits the answer in the Little Endian byte order so that the CRC residue relationship
+    ///     (CRC(message concat CRC(message))) is a fixed value) holds.
+    ///     For CRC-32 this stable output is the byte sequence <c>{ 0x1C, 0xDF, 0x44, 0x21 }</c>,
+    ///     the Little Endian representation of <c>0x2144DF1C</c>.
+    ///   </para>
+    ///   <para>
+    ///     There are multiple, incompatible, definitions of a 32-bit cyclic redundancy
+    ///     check (CRC) algorithm. When interoperating with another system, ensure that you
+    ///     are using the same definition. The definition used by this implementation is not
+    ///     compatible with the cyclic redundancy check described in ITU-T I.363.5.
+    ///   </para>
+    /// </remarks>
+    public class Crc32
+    {
+        private const uint InitialState = 0xFFFF_FFFF;
+        private uint _crc = InitialState;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Crc32"/> class.
+        /// </summary>
+        public Crc32()
+        {
+        }
+
+        /// <summary>
+        /// Appends the contents of <paramref name="source"/> to the data already processed for the current hash computation.
+        /// </summary>
+        /// <param name="source">The data to process.</param>
+        public void Append(SpanByte source)
+        {
+            _crc = ComputeHash(
+                _crc,
+                source);
+        }
+
+        /// <summary>
+        /// Appends the contents of <paramref name="source"/> to the data already processed for the current hash computation.
+        /// </summary>
+        /// <param name="source">The data to process.</param>
+        public void Append(byte[] source)
+        {
+            _crc = ComputeHash(
+                _crc,
+                new SpanByte(source));
+        }
+
+        /// <summary>
+        ///   Appends <paramref name="value"/> to the data already processed for the current hash computation.
+        /// </summary>
+        /// <param name="value">The <see langword="byte"/> to process.</param>
+        public void Append(byte value)
+        {
+            _crc = ComputeHash(
+                _crc,
+                new byte[] { value });
+        }
+
+        /// <summary>
+        ///   Resets the hash computation to the initial state.
+        /// </summary>
+        public void Reset()
+        {
+            _crc = InitialState;
+        }
+
+        /// <summary>Gets the current computed hash value without modifying accumulated state.</summary>
+        /// <returns>The hash value for the data already provided.</returns>
+        public uint GetCurrentHashAsUInt32() => _crc ^ InitialState;
+
+        /// <summary>Computes the CRC-32 hash of the provided data.</summary>
+        /// <param name="source">The data to hash.</param>
+        /// <returns>The computed CRC-32 hash.</returns>
+        public static uint HashToUInt32(SpanByte source) => ComputeHash(InitialState, source) ^ InitialState;
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        extern private static uint ComputeHash(
+            uint crc,
+            SpanByte source);
+    }
+}

System.IO.Hashing/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("nanoFramework.System.IO.Hashing")]
+[assembly: AssemblyCompany("nanoFramework Contributors")]
+[assembly: AssemblyProduct("nanoFramework.System.IO.Hashing")]
+[assembly: AssemblyCopyright("Copyright (c) .NET Foundation and Contributors")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+/////////////////////////////////////////////////////////////////
+// This attribute is mandatory when building Interop libraries //
+// update this whenever the native assembly signature changes  //
+[assembly: AssemblyNativeVersion("100.0.0.1")]
+/////////////////////////////////////////////////////////////////

System.IO.Hashing/System.IO.Hashing.nfproj

@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.props" Condition="Exists('..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.props')" />
+  <PropertyGroup Label="Globals">
+    <NanoFrameworkProjectSystemPath>$(MSBuildExtensionsPath)\nanoFramework\v1.0\</NanoFrameworkProjectSystemPath>
+  </PropertyGroup>
+  <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.Default.props" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.Default.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectTypeGuids>{11A8DD76-328B-46DF-9F39-F559912D0360};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ProjectGuid>a05ef804-3fb8-42d1-8e0a-4d0002502755</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <RootNamespace>System.IO.Hashing</RootNamespace>
+    <AssemblyName>nanoFramework.System.IO.Hashing</AssemblyName>
+    <TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
+    <NF_IsCoreLibrary>True</NF_IsCoreLibrary>
+    <DocumentationFile>bin\$(Configuration)\nanoFramework.System.IO.Hashing.xml</DocumentationFile>
+    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
+    <RestoreLockedMode Condition="'$(TF_BUILD)' == 'True' or '$(ContinuousIntegrationBuild)' == 'True'">true</RestoreLockedMode>
+  </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\key.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+  <PropertyGroup>
+    <DelaySign>false</DelaySign>
+  </PropertyGroup>
+  <PropertyGroup>
+    <!-- override default options for MetaDataProcessor -->
+    <NF_GenerateStubsDirectory>bin\$(Configuration)\Stubs</NF_GenerateStubsDirectory>
+    <NF_GenerateSkeletonProjectName>nf_sys_io_hashing</NF_GenerateSkeletonProjectName>
+    <Name>nanoFramework.System.IO.Hashing</Name>
+  </PropertyGroup>
+  <ItemGroup>
+    <NFMDP_PE_ExcludeClassByName Include="ThisAssembly">
+      <InProject>false</InProject>
+    </NFMDP_PE_ExcludeClassByName>
+  </ItemGroup>
+  <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.props" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.props')" />
+  <ItemGroup>
+    <Compile Include="Crc32.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="mscorlib">
+      <HintPath>..\packages\nanoFramework.CoreLibrary.1.14.2\lib\mscorlib.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\key.snk" Link="key.snk" />
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
+  <ProjectExtensions>
+    <ProjectCapabilities>
+      <ProjectConfigurationsDeclaredAsItems />
+    </ProjectCapabilities>
+  </ProjectExtensions>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105.The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.props'))" />
+    <Error Condition="!Exists('..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.targets'))" />
+  </Target>
+  <Import Project="..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.targets" Condition="Exists('..\packages\Nerdbank.GitVersioning.3.6.133\build\Nerdbank.GitVersioning.targets')" />
+</Project>

System.IO.Hashing/packages.config

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="nanoFramework.CoreLibrary" version="1.14.2" targetFramework="netnano1.0" />
+  <package id="Nerdbank.GitVersioning" version="3.6.133" developmentDependency="true" targetFramework="netnano1.0" />
+</packages>

System.IO.Hashing/packages.lock.json

@@ -0,0 +1,19 @@
+{
+  "version": 1,
+  "dependencies": {
+    ".NETnanoFramework,Version=v1.0": {
+      "nanoFramework.CoreLibrary": {
+        "type": "Direct",
+        "requested": "[1.14.2, 1.14.2]",
+        "resolved": "1.14.2",
+        "contentHash": "j1mrz4mitl5LItvmHMsw1aHzCAfvTTgIkRxA0mhs5mSpctJ/BBcuNwua5j3MspfRNKreCQPy/qZy/D9ADLL/PA=="
+      },
+      "Nerdbank.GitVersioning": {
+        "type": "Direct",
+        "requested": "[3.6.133, 3.6.133]",
+        "resolved": "3.6.133",
+        "contentHash": "VZWMd5YAeDxpjWjAP/X6bAxnRMiEf6tES/ITN0X5CHJgkWLLeHGmEALivmTAfYM6P+P/3Szy6VCITUAkqjcHVw=="
+      }
+    }
+  }
+}