From 09572095fae3bcba0a6c0969f3901d21a2e4dbc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Sim=C3=B5es?= <jose.simoes@eclo.solutions>
Date: Fri, 27 Oct 2023 20:56:12 +0100
Subject: [PATCH] Initial version

---
 .github/workflows/pr-checks.yml               |  18 ++++
 .github/workflows/update-dependencies.yml     |  21 ++++
 .github_changelog_generator                   |  13 +++
 .runsettings                                  |  17 +++
 CHANGELOG.md                                  |   0
 LICENSE.md                                    |  21 ++++
 NuGet.Config                                  |   7 ++
 README.md                                     |  40 +++++++
 System.IO.Hashing/Crc32.cs                    | 100 ++++++++++++++++++
 System.IO.Hashing/Properties/AssemblyInfo.cs  |  22 ++++
 System.IO.Hashing/System.IO.Hashing.nfproj    |  72 +++++++++++++
 System.IO.Hashing/packages.config             |   5 +
 System.IO.Hashing/packages.lock.json          |  19 ++++
 Tests/System.IO.HashingTests/Crc32Tests.cs    |  74 +++++++++++++
 .../Properties/AssemblyInfo.cs                |  31 ++++++
 .../System.IO.HashingTests.nfproj             |  54 ++++++++++
 Tests/System.IO.HashingTests/packages.config  |   6 ++
 .../System.IO.HashingTests/packages.lock.json |  25 +++++
 assets/nf-logo.png                            | Bin 0 -> 9200 bytes
 assets/readme.txt                             |  21 ++++
 azure-pipelines.yml                           |  64 ++++++++---
 config/SignClient.json                        |  14 +++
 config/filelist.txt                           |   1 +
 key.snk                                       | Bin 0 -> 596 bytes
 nanoFramework.System.IO.Hashing.nuspec        |  37 +++++++
 nanoFramework.System.IO.Hashing.sln           |  47 ++++++++
 version.json                                  |  24 +++++
 27 files changed, 741 insertions(+), 12 deletions(-)
 create mode 100644 .github/workflows/pr-checks.yml
 create mode 100644 .github/workflows/update-dependencies.yml
 create mode 100644 .github_changelog_generator
 create mode 100644 .runsettings
 create mode 100644 CHANGELOG.md
 create mode 100644 LICENSE.md
 create mode 100644 NuGet.Config
 create mode 100644 README.md
 create mode 100644 System.IO.Hashing/Crc32.cs
 create mode 100644 System.IO.Hashing/Properties/AssemblyInfo.cs
 create mode 100644 System.IO.Hashing/System.IO.Hashing.nfproj
 create mode 100644 System.IO.Hashing/packages.config
 create mode 100644 System.IO.Hashing/packages.lock.json
 create mode 100644 Tests/System.IO.HashingTests/Crc32Tests.cs
 create mode 100644 Tests/System.IO.HashingTests/Properties/AssemblyInfo.cs
 create mode 100644 Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj
 create mode 100644 Tests/System.IO.HashingTests/packages.config
 create mode 100644 Tests/System.IO.HashingTests/packages.lock.json
 create mode 100644 assets/nf-logo.png
 create mode 100644 assets/readme.txt
 create mode 100644 config/SignClient.json
 create mode 100644 config/filelist.txt
 create mode 100644 key.snk
 create mode 100644 nanoFramework.System.IO.Hashing.nuspec
 create mode 100644 nanoFramework.System.IO.Hashing.sln
 create mode 100644 version.json

diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
new file mode 100644
index 0000000..a530836
--- /dev/null
+++ b/.github/workflows/pr-checks.yml
@@ -0,0 +1,18 @@
+# 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'
diff --git a/.github/workflows/update-dependencies.yml b/.github/workflows/update-dependencies.yml
new file mode 100644
index 0000000..a799a8f
--- /dev/null
+++ b/.github/workflows/update-dependencies.yml
@@ -0,0 +1,21 @@
+# 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'
diff --git a/.github_changelog_generator b/.github_changelog_generator
new file mode 100644
index 0000000..f3844e6
--- /dev/null
+++ b/.github_changelog_generator
@@ -0,0 +1,13 @@
+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
diff --git a/.runsettings b/.runsettings
new file mode 100644
index 0000000..75f9622
--- /dev/null
+++ b/.runsettings
@@ -0,0 +1,17 @@
+<?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>
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..e69de29
diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 0000000..94286c9
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,21 @@
+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.
diff --git a/NuGet.Config b/NuGet.Config
new file mode 100644
index 0000000..ef0bacf
--- /dev/null
+++ b/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>
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6435162
--- /dev/null
+++ b/README.md
@@ -0,0 +1,40 @@
+[![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).
diff --git a/System.IO.Hashing/Crc32.cs b/System.IO.Hashing/Crc32.cs
new file mode 100644
index 0000000..f1879a1
--- /dev/null
+++ b/System.IO.Hashing/Crc32.cs
@@ -0,0 +1,100 @@
+//
+// 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);
+    }
+}
diff --git a/System.IO.Hashing/Properties/AssemblyInfo.cs b/System.IO.Hashing/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..175fbaa
--- /dev/null
+++ b/System.IO.Hashing/Properties/AssemblyInfo.cs
@@ -0,0 +1,22 @@
+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")]
+/////////////////////////////////////////////////////////////////
diff --git a/System.IO.Hashing/System.IO.Hashing.nfproj b/System.IO.Hashing/System.IO.Hashing.nfproj
new file mode 100644
index 0000000..0122bd4
--- /dev/null
+++ b/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>
\ No newline at end of file
diff --git a/System.IO.Hashing/packages.config b/System.IO.Hashing/packages.config
new file mode 100644
index 0000000..75b7f06
--- /dev/null
+++ b/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>
\ No newline at end of file
diff --git a/System.IO.Hashing/packages.lock.json b/System.IO.Hashing/packages.lock.json
new file mode 100644
index 0000000..b80edcb
--- /dev/null
+++ b/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=="
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/Tests/System.IO.HashingTests/Crc32Tests.cs b/Tests/System.IO.HashingTests/Crc32Tests.cs
new file mode 100644
index 0000000..a711446
--- /dev/null
+++ b/Tests/System.IO.HashingTests/Crc32Tests.cs
@@ -0,0 +1,74 @@
+//
+// 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 nanoFramework.TestFramework;
+using System.Collections;
+using System.IO.Hashing;
+using System.Text;
+
+namespace Crc32Tests
+{
+    [TestClass]
+    public class Crc32Tests
+    {
+        static ArrayList _testData = new()
+        {
+            new byte[] { },
+            new byte[] { 0x01 },
+            new byte[] { 0x00, 0x00, 0x00, 0x00 },
+            new byte[] { 0xFF, 0xFF, 0xFF, 0xFF },
+            new byte[] { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x26, 0x39, 0xF4, 0xCB },
+            new byte[] { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0xD9, 0xC6, 0x0B, 0x34 },
+            Encoding.UTF8.GetBytes("a"),
+            Encoding.UTF8.GetBytes("abc"),
+            Encoding.UTF8.GetBytes("The quick brown fox jumps over the lazy dog")
+        };
+
+        [DataRow("Empty", 0, 0u)]
+        [DataRow("One", 1, 0xA505DF1Bu)]
+        [DataRow("Zero-Residue", 2, 0x2144DF1Cu)]
+        [DataRow("Zero-InverseResidue", 3, 0xFFFFFFFFu)]
+        [DataRow("Self-test residue", 4, 0x2144DF1Cu)]
+        [DataRow("Self-test inverse residue", 5, 0xFFFFFFFFu)]
+        [DataRow("String a", 6, 0xE8B7BE43u)]
+        [DataRow("String abc", 7, 0x352441C2u)]
+        [DataRow("String message digest", 8, 0x414FA339u)]
+        [TestMethod]
+        public void TestByteArrayHashing_00(
+            string testName,
+            int dataIndex,
+            uint hash)
+        {
+            OutputHelper.WriteLine($"Test: {testName}");
+
+            var crc32 = new Crc32();
+
+            crc32.Append((byte[])_testData[dataIndex]);
+            Assert.AreEqual(hash, crc32.GetCurrentHashAsUInt32());
+        }
+
+        [DataRow("Empty", 0, 0u)]
+        [DataRow("One", 1, 0xA505DF1Bu)]
+        [DataRow("Zero-Residue", 2, 0x2144DF1Cu)]
+        [DataRow("Zero-InverseResidue", 3, 0xFFFFFFFFu)]
+        [DataRow("Self-test residue", 4, 0x2144DF1Cu)]
+        [DataRow("Self-test inverse residue", 5, 0xFFFFFFFFu)]
+        [DataRow("String a", 6, 0xE8B7BE43u)]
+        [DataRow("String abc", 7, 0x352441C2u)]
+        [DataRow("String message digest", 8, 0x414FA339u)]
+        [TestMethod]
+        public void TestByteArrayHashing_01(
+            string testName,
+            int dataIndex,
+            uint hash)
+        {
+            OutputHelper.WriteLine($"Test: {testName}");
+
+            var computedHash = Crc32.HashToUInt32((byte[])_testData[dataIndex]);
+            Assert.AreEqual(hash, computedHash);
+        }
+    }
+}
diff --git a/Tests/System.IO.HashingTests/Properties/AssemblyInfo.cs b/Tests/System.IO.HashingTests/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..a3735af
--- /dev/null
+++ b/Tests/System.IO.HashingTests/Properties/AssemblyInfo.cs
@@ -0,0 +1,31 @@
+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: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyCopyright("Copyright (c) 2021 nanoFramework contributors")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// 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)]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj b/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj
new file mode 100644
index 0000000..27ca2f4
--- /dev/null
+++ b/Tests/System.IO.HashingTests/System.IO.HashingTests.nfproj
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <NanoFrameworkProjectSystemPath>$(MSBuildExtensionsPath)\nanoFramework\v1.0\</NanoFrameworkProjectSystemPath>
+  </PropertyGroup>
+  <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.Default.props" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.Default.props')" />
+  <ItemGroup>
+    <ProjectCapability Include="TestContainer" />
+  </ItemGroup>
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectTypeGuids>{11A8DD76-328B-46DF-9F39-F559912D0360};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ProjectGuid>164e2d6c-8e81-47c7-93f2-98898e36b0cd</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <RootNamespace>Crc32Tests</RootNamespace>
+    <AssemblyName>NFUnitTest</AssemblyName>
+    <IsCodedUITest>False</IsCodedUITest>
+    <IsTestProject>true</IsTestProject>
+    <TestProjectType>UnitTest</TestProjectType>
+    <TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
+  </PropertyGroup>
+  <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.props" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.props')" />
+  <PropertyGroup>
+    <RunSettingsFilePath>$(SolutionDir)\.runsettings</RunSettingsFilePath>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="Crc32Tests.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="mscorlib">
+      <HintPath>..\..\packages\nanoFramework.CoreLibrary.1.14.2\lib\mscorlib.dll</HintPath>
+    </Reference>
+    <Reference Include="nanoFramework.System.Text">
+      <HintPath>..\..\packages\nanoFramework.System.Text.1.2.37\lib\nanoFramework.System.Text.dll</HintPath>
+    </Reference>
+    <Reference Include="nanoFramework.TestFramework">
+      <HintPath>..\..\packages\nanoFramework.TestFramework.2.1.85\lib\nanoFramework.TestFramework.dll</HintPath>
+    </Reference>
+    <Reference Include="nanoFramework.UnitTestLauncher">
+      <HintPath>..\..\packages\nanoFramework.TestFramework.2.1.85\lib\nanoFramework.UnitTestLauncher.exe</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\System.IO.Hashing\System.IO.Hashing.nfproj" />
+  </ItemGroup>
+  <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
+</Project>
\ No newline at end of file
diff --git a/Tests/System.IO.HashingTests/packages.config b/Tests/System.IO.HashingTests/packages.config
new file mode 100644
index 0000000..f45895e
--- /dev/null
+++ b/Tests/System.IO.HashingTests/packages.config
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="nanoFramework.CoreLibrary" version="1.14.2" targetFramework="netnano1.0" />
+  <package id="nanoFramework.System.Text" version="1.2.37" targetFramework="netnano1.0" />
+  <package id="nanoFramework.TestFramework" version="2.1.85" targetFramework="netnano1.0" developmentDependency="true" />
+</packages>
\ No newline at end of file
diff --git a/Tests/System.IO.HashingTests/packages.lock.json b/Tests/System.IO.HashingTests/packages.lock.json
new file mode 100644
index 0000000..d5213a1
--- /dev/null
+++ b/Tests/System.IO.HashingTests/packages.lock.json
@@ -0,0 +1,25 @@
+{
+  "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=="
+      },
+      "nanoFramework.System.Text": {
+        "type": "Direct",
+        "requested": "[1.2.37, 1.2.37]",
+        "resolved": "1.2.37",
+        "contentHash": "ORgRq0HSynSBhlXRTHdhzZiOdq/nRhdnX+DeIGw56y9OSc8dvqUz6elm97Jz+4WQ6ikpvs5PFGINAa35kBebwQ=="
+      },
+      "nanoFramework.TestFramework": {
+        "type": "Direct",
+        "requested": "[2.1.85, 2.1.85]",
+        "resolved": "2.1.85",
+        "contentHash": "UAydT9MgZfufPcLpn5KbFZkR3ul6zSt9ERYDPDen7IWxeT+fGpRTes8QTWfhgMsxF3E27b3wI6K6wwWQkeGuFQ=="
+      }
+    }
+  }
+}
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HcmV?d00001

diff --git a/assets/readme.txt b/assets/readme.txt
new file mode 100644
index 0000000..8449286
--- /dev/null
+++ b/assets/readme.txt
@@ -0,0 +1,21 @@
+                           _____                                            _    
+   _ __   __ _ _ __   ___ |  ___| __ __ _ _ __ ___   _____      _____  _ __| | __
+  | '_ \ / _` | '_ \ / _ \| |_ | '__/ _` | '_ ` _ \ / _ \ \ /\ / / _ \| '__| |/ /
+  | | | | (_| | | | | (_) |  _|| | | (_| | | | | | |  __/\ V  V / (_) | |  |   < 
+  |_| |_|\__,_|_| |_|\___/|_|  |_|  \__,_|_| |_| |_|\___| \_/\_/ \___/|_|  |_|\_\
+                                                                               
+===================================================================================
+
+API docs: https://docs.nanoframework.net/api/nanoFramework.System.IO.Hashing.html
+
+Browse our samples repository: https://github.com/nanoframework/samples
+
+Check our documentation online: https://docs.nanoframework.net/
+
+Join our lively Discord community: https://discord.gg/gCyBu8T
+
+Report issues: https://github.com/nanoframework/Home/issues
+
+Follow us on Twitter: https://twitter.com/nanoframework
+
+Follow our YouTube channel: https://www.youtube.com/c/nanoFramework
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index f53e97b..1eab7e0 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -1,19 +1,59 @@
-# Starter pipeline
-# Start with a minimal pipeline that you can customize to build and deploy your code.
-# Add steps that build, run tests, deploy, and more:
-# https://aka.ms/yaml
+# Copyright (c) .NET Foundation and Contributors
+# See LICENSE file in the project root for full license information.
 
 trigger:
-- main
+  branches:
+    include:
+      - main
+      - release-*
+  paths:
+    exclude:
+      - .github_changelog_generator
+      - .gitignore
+      - CHANGELOG.md
+      - LICENSE.md
+      - README.md
+      - NuGet.Config
+      - assets/*
+      - config/*
+      - .github/*
+
+# PR always trigger build
+pr:
+  autoCancel: true
+
+# add nf-tools repo to resources (for Azure Pipelines templates)
+resources:
+  repositories:
+    - repository: templates
+      type: github
+      name: nanoframework/nf-tools
+      endpoint: nanoframework
 
 pool:
-  vmImage: ubuntu-latest
+  vmImage: 'windows-latest'
+
+variables:
+  DOTNET_NOLOGO: true
+  solution: 'nanoFramework.System.IO.Hashing.sln'
+  buildPlatform: 'Any CPU'
+  buildConfiguration: 'Release'
+  nugetPackageName: 'nanoFramework.System.IO.Hashing'
 
 steps:
-- script: echo Hello, world!
-  displayName: 'Run a one-line script'
 
-- script: |
-    echo Add other tasks to build, test, and deploy your project.
-    echo See https://aka.ms/yaml
-  displayName: 'Run a multi-line script'
+# step from template @ nf-tools repo
+# all build, update and publish steps
+- template: azure-pipelines-templates/class-lib-build.yml@templates
+  parameters:
+    sonarCloudProject: 'nanoframework_System.IO.Hashing'
+    runUnitTests: false
+    unitTestRunsettings: '$(System.DefaultWorkingDirectory)\.runsettings'
+
+# step from template @ nf-tools repo
+# report error
+- template: azure-pipelines-templates/discord-webhook-task.yml@templates  
+  parameters:
+    status: 'failure'
+    webhookUrl: '$(DiscordWebhook)'
+    message: ''
diff --git a/config/SignClient.json b/config/SignClient.json
new file mode 100644
index 0000000..482177d
--- /dev/null
+++ b/config/SignClient.json
@@ -0,0 +1,14 @@
+{
+    "SignClient": {
+      "AzureAd": {
+        "AADInstance": "https://login.microsoftonline.com/",
+        "ClientId": "c248d68a-ba6f-4aa9-8a68-71fe872063f8",
+        "TenantId": "16076fdc-fcc1-4a15-b1ca-32c9a255900e"
+      },
+      "Service": {
+        "Url": "https://codesign.dotnetfoundation.org/",
+        "ResourceId": "https://SignService/3c30251f-36f3-490b-a955-520addb85001"
+      }
+    }
+  }
+  
\ No newline at end of file
diff --git a/config/filelist.txt b/config/filelist.txt
new file mode 100644
index 0000000..786fca4
--- /dev/null
+++ b/config/filelist.txt
@@ -0,0 +1 @@
+**/nanoFramework.System.IO.Hashing.*
\ No newline at end of file
diff --git a/key.snk b/key.snk
new file mode 100644
index 0000000000000000000000000000000000000000..67c9bb0ad77fd9cfb31a5fe1f8e4f6537f8883f8
GIT binary patch
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literal 0
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diff --git a/nanoFramework.System.IO.Hashing.nuspec b/nanoFramework.System.IO.Hashing.nuspec
new file mode 100644
index 0000000..ddf4fa3
--- /dev/null
+++ b/nanoFramework.System.IO.Hashing.nuspec
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2012/06/nuspec.xsd">
+  <metadata>
+    <id>nanoFramework.System.IO.Hashing</id>
+    <version>$version$</version>
+    <title>nanoFramework.System.IO.Hashing</title>
+    <authors>nanoframework</authors>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <license type="file">LICENSE.md</license>
+    <releaseNotes>
+    </releaseNotes>
+    <readme>docs\README.md</readme>
+    <developmentDependency>false</developmentDependency>
+    <projectUrl>https://github.com/nanoframework/System.IO.Hashing</projectUrl>
+    <icon>images\nf-logo.png</icon>
+    <repository type="git" url="https://github.com/nanoframework/System.IO.Hashing" commit="$commit$" />
+    <copyright>Copyright (c) .NET Foundation and Contributors</copyright>
+    <description>This package includes the nanoFramework System.IO.Hashing assembly for .NET nanoFramework C# projects.
+This package requires a target with nanoFramework.System.IO.Hashing v$nativeVersion$ (checksum $checksum$).</description>
+    <tags>nanoFramework C# csharp netmf netnf </tags>
+    <dependencies>
+      <dependency id="nanoFramework.CoreLibrary" version="1.14.2" />
+    </dependencies>
+  </metadata>
+  <files>
+    <file src="nanoFramework.System.IO.Hashing\bin\Release\nanoFramework.System.IO.Hashing.dll" target="lib\nanoFramework.System.IO.Hashing.dll" />
+    <file src="nanoFramework.System.IO.Hashing\bin\Release\nanoFramework.System.IO.Hashing.pdb" target="lib\nanoFramework.System.IO.Hashing.pdb" />
+    <file src="nanoFramework.System.IO.Hashing\bin\Release\nanoFramework.System.IO.Hashing.pdbx" target="lib\nanoFramework.System.IO.Hashing.pdbx" />
+    <file src="nanoFramework.System.IO.Hashing\bin\Release\nanoFramework.System.IO.Hashing.pe" target="lib\nanoFramework.System.IO.Hashing.pe" />
+    <file src="nanoFramework.System.IO.Hashing\bin\Release\nanoFramework.System.IO.Hashing.xml" target="lib\nanoFramework.System.IO.Hashing.xml" />
+    <!-- readme -->
+    <file src="assets\readme.txt" target="" />
+    <file src="README.md" target="docs\" />
+    <file src="assets\nf-logo.png" target="images" />
+    <file src="LICENSE.md" target="" />
+  </files>
+</package>
\ No newline at end of file
diff --git a/nanoFramework.System.IO.Hashing.sln b/nanoFramework.System.IO.Hashing.sln
new file mode 100644
index 0000000..6152426
--- /dev/null
+++ b/nanoFramework.System.IO.Hashing.sln
@@ -0,0 +1,47 @@
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+EndProject
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+EndProject
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+EndProject
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+		{A05EF804-3FB8-42D1-8E0A-4D0002502755}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A05EF804-3FB8-42D1-8E0A-4D0002502755}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A05EF804-3FB8-42D1-8E0A-4D0002502755}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
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+		{A05EF804-3FB8-42D1-8E0A-4D0002502755}.Release|Any CPU.Deploy.0 = Release|Any CPU
+	EndGlobalSection
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diff --git a/version.json b/version.json
new file mode 100644
index 0000000..fdf769d
--- /dev/null
+++ b/version.json
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+}