Walter.Cypher 2024.7.11.1604

Prefix Reserved
dotnet add package Walter.Cypher --version 2024.7.11.1604                
NuGet\Install-Package Walter.Cypher -Version 2024.7.11.1604                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Walter.Cypher" Version="2024.7.11.1604" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Walter.Cypher --version 2024.7.11.1604                
#r "nuget: Walter.Cypher, 2024.7.11.1604"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Walter.Cypher as a Cake Addin
#addin nuget:?package=Walter.Cypher&version=2024.7.11.1604

// Install Walter.Cypher as a Cake Tool
#tool nuget:?package=Walter.Cypher&version=2024.7.11.1604                

WALTER

Introducing the WALTER Framework: Workable Algorithms for Location-aware Transmission, Encryption Response. Designed for modern developers, WALTER is a groundbreaking suite of NuGet packages crafted for excellence in .NET Standard 2.0, 2.1, Core 3.1, and .NET 6, 7, 8, as well as C++ environments. By integrating Delphi's native development strengths, we�ve enhanced WALTER�s encryption capabilities to be not only robust but also future-proof, ensuring that it excels in performance, stability, and cross-platform support.

Whether you're tackling networking, encryption, or secure communication, WALTER offers unparalleled efficiency and precision in processing, making it an essential tool for developers who prioritize speed, security, and memory management in their applications.

About this Walter.Cypher Nuget Package

The Walter.Cypher package is a testament to our commitment to providing developers with state-of-the-art cryptographic capabilities. By leveraging Delphi�s potent native development environment, we�ve engineered the package to offer hashing, symmetric, and asymmetric encryption methods that are secure, efficient, and cross-platform. This ensures that data encrypted with Walter.Cypher remains secure against both current and emergent cyber threats, including those posed by quantum computing advancements.

For detailed insights into how Delphi underpins our cryptographic solutions, offering a blend of speed, efficiency, and future-readiness, refer to the DelphiInside.md document. This document elaborates on our strategic choice of Delphi for native calls and AoT compilation, ensuring that the Walter.Cypher package delivers exceptional performance and security across all platforms.

Online documentation and sample code are available to help you integrate Walter.Cypher into your projects seamlessly.

Walter.Cypher

This repository showcases how to utilize the Walter.Cypher NuGet package effectively in your projects with minimal code snippets.

Walter.Web.CypherTests sample code

This sample code shows the use of

  1. Fixed cypher using a password to protect your code.
  2. Generating checksum for tamper detection.
  3. PGP using various key strengths to protect data
  4. The use of Numeric encryption that can be used to defeat base64 scanning tools to detect cyphered constants for password probing as values can be stored in int64 type values

Get Started

Show how to cipher large amounts of text using the Crypto class


[TestMethod()]
public void CipherZip()
{
    var sb = new StringBuilder();
    for (var i = 0; i < 1024; i++)
    {
        sb.Append(DateTime.Now.ToString());
    }
    var test = sb.ToString();

    var cypkered = Crypto.Zip(test);
    var expect = Crypto.UnZip(cypkered);
    Assert.AreEqual(test, expect);
}

Alternatively you can use the extension method

[TestMethod()]
public void CypherExtesnionTest()
{
    var testpw = "65654616540546546";
    var cypher = Environment.MachineName.Encrypt(testpw);
    var clear = cypher.Decrypt(testpw);

    Assert.AreEqual(Environment.MachineName, clear);
}

The extension method for cypher also allow encryption using public/private key encryption using certificates for text of any length

[TestMethod]
public void TestSmallStringAsBytes()
{
    using X509Certificate2 encryptCertificate = GetCert(".cer");
    using X509Certificate2 decryptCertificate = GetCert(".pfx", "01234456");

    var certCypher = Environment.MachineName.AsEncryptedBytes(encryptCertificate);
    var clearBytes = certCypher.AsDecryptFromBytes(decryptCertificate);

    Assert.AreEqual(Environment.MachineName, UTF8Encoding.UTF8.GetString(clearBytes));

    // helper method load embedded test certificate resource from assembly
    static X509Certificate2 GetCert(string extension, string password = null)
    {
        var asam = Assembly.GetExecutingAssembly();
        using (var memory = new MemoryStream())
        using (var stream = asam.GetManifestResourceStream(asam.GetManifestResourceNames().First(f => f.EndsWith(extension))))
        {
            stream.CopyTo(memory);
            return new X509Certificate2(memory.ToArray(), password);
        }
    }
}

[TestMethod]
public void TestLargeStringAsBytes()
{
    using X509Certificate2 encryptCertificate = GetCert(".cer");
    using X509Certificate2 cecryptCertificate = GetCert(".pfx","01234456");

    var sb = new StringBuilder();
    for (int i = 0; i < 100; i++)
    {
        sb.Append(Guid.NewGuid());
    }
    var text = sb.ToString();

    var certCypher = text.AsEncryptedBytes(encryptCertificate);
    Assert.AreNotEqual(certCypher.Length, text.Length);

    var clearBytes = certCypher.AsDecryptFromBytes(cecryptCertificate);
    Assert.AreEqual(text, UTF8Encoding.UTF8.GetString(clearBytes));

    X509Certificate2 GetCert(string extension, string password = null)
    {
        var asam = Assembly.GetExecutingAssembly();
        using (var memory = new MemoryStream())
        using (var stream = asam.GetManifestResourceStream(asam.GetManifestResourceNames().First(f => f.EndsWith(extension))))
        {
            stream!.CopyTo(memory);
            return new X509Certificate2(memory.ToArray(), password);
        }
    }
}


You also have the possibility to encrypt and decrypt persisted text based on the hosting machine, user executing the application, the application or process name this feature works on all platforms that support where that support the concept of users, processes and machine names in .NET and is ideal for storing secure data in memory that should not be possible to access when creating an application dump file but should survive a reboot.

There are some limitations on some IOT devices that might prevent you from using these features

public void RoundTrip_EncryptionScope_Process()
{
    var sb = new StringBuilder();
    for (int i = 0; i < 100; i++)
    {
        sb.Append(Guid.NewGuid());
    }
    var text = sb.ToString();

    var certCypher = text.AsEncryptedBytes(scope: EncryptionScope.Process);
    Assert.AreNotEqual(certCypher.Length, text.Length);

    var clearText = certCypher.AsDecryptFromBytes(scope: EncryptionScope.Process);
    Assert.AreEqual(text, clearText);

}

[TestMethod()]
public void RoundTrip_EncryptionScope_User()
{
    var sb = new StringBuilder();
    for (int i = 0; i < 100; i++)
    {
        sb.Append(Guid.NewGuid());
    }
    var text = sb.ToString();

    var certCypher = text.AsEncryptedBytes(scope: EncryptionScope.User);
    Assert.AreNotEqual(certCypher.Length, text.Length);

    var clearText = certCypher.AsDecryptFromBytes(scope: EncryptionScope.User);
    Assert.AreEqual(text, clearText);
}

[TestMethod()]
public void RoundTrip_EncryptionScope_Machine()
{
    var sb = new StringBuilder();
    for (int i = 0; i < 100; i++)
    {
        sb.Append(Guid.NewGuid());
    }
    var text = sb.ToString();

    var certCypher = text.AsEncryptedBytes(scope: EncryptionScope.Machine);
    Assert.AreNotEqual(certCypher.Length, text.Length);

    var clearText = certCypher.AsDecryptFromBytes(scope: EncryptionScope.Machine);
    Assert.AreEqual(text, clearText);
}

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net8.0-windows7.0 is compatible. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 is compatible. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on Walter.Cypher:

Package Downloads
Walter.BOM

Internal NuGet package with business objects used by several ASP-WAF products Documentation available at https://firewallapi.asp-waf.com/?topic=html/N-Walter.BOM.htm

GitHub repositories

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Version Downloads Last updated
2024.7.11.1604 177 7/11/2024
2024.7.9.1509 314 7/9/2024
2024.7.4.1424 315 7/4/2024
2024.7.3.1001 320 7/3/2024
2024.6.26.1408 607 6/28/2024
2024.6.6.1320 220 6/8/2024
2024.5.19.712 83 6/8/2024
2024.5.15.1634 223 5/15/2024
2024.5.14.829 152 5/14/2024
2024.5.13.1637 86 5/13/2024
2024.5.8.1005 198 5/8/2024
2024.4.4.2102 224 4/4/2024
2024.3.26.1111 175 3/26/2024
2024.3.19.2310 163 3/19/2024
2024.3.12.1022 169 3/12/2024
2024.3.7.836 194 3/7/2024
2024.3.6.1645 97 3/6/2024
2024.3.3.842 124 3/3/2024
2024.3.3.750 94 3/3/2024
2024.3.1.1143 111 3/1/2024
2024.2.27.1029 93 2/27/2024
2024.2.6.1959 119 2/6/2024
2023.10.12.1926 3,721 10/12/2023
2023.9.14.812 1,590 9/14/2023
2023.8.29.1040 8,671 8/29/2023
2023.8.17.903 1,715 8/17/2023
2023.8.9.1314 1,767 8/9/2023
2023.8.2.750 1,875 8/2/2023
2023.7.12.830 1,848 7/12/2023
2023.7.5.1419 1,955 7/6/2023
2023.6.14.1628 3,575 6/14/2023
2023.5.30.1640 2,353 5/30/2023
2023.5.4.1552 2,407 5/4/2023
2023.4.12.1236 6,573 4/12/2023
2023.3.14.1356 5,256 3/14/2023
2023.3.1.810 3,058 3/1/2023
2023.2.25.1185 838 2/25/2023
2023.2.22.27 5,398 2/22/2023
2023.2.15.1413 3,244 2/15/2023
2023.2.11.1628 3,253 2/11/2023
2023.1.11.534 3,533 1/11/2023
2022.12.14.648 12,379 12/14/2022
2022.11.27.1059 3,881 11/27/2022
2022.11.21.338 3,991 11/21/2022
2022.11.14.1819 4,163 11/14/2022
2022.11.14.1533 550 11/14/2022
2022.11.13.917 4,821 11/13/2022
2022.10.31.740 7,831 11/1/2022
2022.10.15.652 8,117 10/15/2022
2022.10.1.810 10,027 10/1/2022
2022.9.26.1444 10,705 9/26/2022
2022.9.14.809 9,363 9/14/2022
2022.9.8.1009 17,917 9/8/2022
2022.8.20.1007 9,556 8/20/2022
2022.8.1.1 9,841 7/31/2022
2022.7.15.841 18,548 7/15/2022
2022.7.1.1300 9,949 7/1/2022
2022.6.21.647 9,836 6/21/2022
2022.5.4.1010 35,809 5/4/2022
2022.4.10.828 28,819 4/10/2022
2022.3.26.1117 28,556 3/26/2022
2022.2.11.931 49,770 2/17/2022
2022.1.15.1312 20,570 1/17/2022
2022.1.10.537 19,638 1/10/2022
2022.1.7.1357 9,372 1/8/2022
2021.12.28.1452 10,783 12/28/2021
2021.12.15.911 10,070 12/16/2021
2021.11.19.850 37,218 11/19/2021
2021.11.11.1334 29,976 11/16/2021
2021.11.8.2109 8,732 11/9/2021
2021.11.8.1612 9,307 11/8/2021
2021.10.23.1310 51,045 10/25/2021
2021.10.13.1459 9,715 10/18/2021
2021.10.9.821 431 10/10/2021
2021.9.26.1913 64,750 9/26/2021
2021.9.17.1702 14,942 9/18/2021
2021.8.30.1319 94,647 8/30/2021
2021.8.14.1600 52,514 8/16/2021
2021.8.14.829 5,506 8/14/2021
2021.8.8.1612 18,241 8/8/2021
2021.8.8.1138 402 8/8/2021
2021.7.22.1044 62,592 7/23/2021
2021.7.15.1547 9,784 7/15/2021
2021.7.12.734 9,616 7/13/2021
2021.6.26.1753 36,566 6/27/2021
2021.6.23.734 19,030 6/24/2021
2021.6.19.803 10,263 6/20/2021
2021.6.11.1600 36,807 6/13/2021
2021.6.9.1120 9,934 6/9/2021
2021.6.7.1407 2,476 6/7/2021
2021.5.28.1533 18,583 5/31/2021
2021.5.28.1451 9,983 5/31/2021
2021.5.25.1732 8,799 5/25/2021
2021.5.12.929 31,839 5/12/2021
2021.5.12.914 381 5/12/2021
2021.5.12.637 5,460 5/12/2021
2021.5.5.1901 32,633 5/6/2021
2021.5.2.1617 9,561 5/4/2021
2021.5.1.1505 9,849 5/1/2021
2021.4.28.1505 9,612 4/28/2021
2021.4.5.1653 62,687 4/5/2021
2021.4.1.913 9,749 4/1/2021
2021.3.31.1630 9,658 4/1/2021
2021.3.18.1608 10,069 3/18/2021
2021.3.3.1295 459 3/3/2021
2021.3.3.835 474 3/3/2021
2021.3.1.1205 24,203 3/2/2021
2021.3.1.1 16,762 2/27/2021
2021.2.21.1 16,258 2/21/2021
2021.2.19.3 8,804 2/20/2021
2021.2.19.2 8,506 2/19/2021
2021.2.18.2 7,551 2/19/2021
2021.2.18.1 425 2/19/2021
2021.2.16.1 16,684 2/16/2021
2021.2.10.1 37,734 2/10/2021
2021.2.9.1 7,473 2/9/2021
2021.2.8.1 455 2/9/2021
2021.2.7.1 14,189 2/6/2021
2020.12.27.1 13,622 12/27/2020
2020.12.26.3 19,851 12/27/2020
2020.12.26.2 470 12/27/2020
2020.12.24.2 507 12/26/2020
2020.12.24.1 451 12/24/2020
2020.12.18.1 7,623 12/19/2020
2020.12.15.1 13,681 12/15/2020
2020.12.14.5 12,879 12/14/2020
2020.12.14.4 7,011 12/14/2020
2020.12.14.3 6,744 12/14/2020
2020.11.27.1 67,232 11/27/2020
2020.11.25.1 12,946 11/25/2020
2020.11.23.1 477 11/25/2020
2020.11.22.2 8,634 11/23/2020
2020.11.20.1 7,907 11/21/2020
2020.11.19.3 7,976 11/19/2020
2020.11.11.1 64,127 11/11/2020
2020.10.9.5 139,472 10/9/2020
2020.10.5.1 70,437 10/5/2020
2020.10.4.1 511 10/4/2020
2020.10.1.1 18,716 10/1/2020
2020.9.24.2 23,710 9/24/2020
2020.9.12.1 49,832 9/12/2020
2020.9.8 17,363 9/8/2020
2020.9.6.5 5,257 9/6/2020
2020.9.6.4 510 9/6/2020
2020.9.6.2 1,718 9/6/2020
2020.9.3.1 14,294 9/3/2020

2 April 2024
- Update to 8.0.3

7 March 2024
- Update to allow trimming and A0T compilation under .net 8

16 November 2023
- Update to add support for .net 8

14 September 2023
- SDK Service pack .net 6 and 7

9 August 2023
- Update to sevice packs of .net 6 and 7

2 Augusted  2023
- Update binaries