Walter.Cypher 2025.2.26.1548

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 
dotnet add package Walter.Cypher --version 2025.2.26.1548                

                    
                

            
NuGet\Install-Package Walter.Cypher -Version 2025.2.26.1548
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="2025.2.26.1548" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Walter.Cypher --version 2025.2.26.1548                

                    
                

            
#r "nuget: Walter.Cypher, 2025.2.26.1548"
#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=2025.2.26.1548

// Install Walter.Cypher as a Cake Tool
#tool nuget:?package=Walter.Cypher&version=2025.2.26.1548

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 was computed.  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 was computed.  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-android34.0 is compatible.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-ios18.0 is compatible.  net8.0-maccatalyst was computed.  net8.0-maccatalyst18.0 is compatible.  net8.0-macos was computed.  net8.0-macos15.0 is compatible.  net8.0-tvos was computed.  net8.0-windows was computed.  net8.0-windows7.0 is compatible.  net9.0 is compatible.  net9.0-android was computed.  net9.0-android35.0 is compatible.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-ios18.0 is compatible.  net9.0-maccatalyst was computed.  net9.0-maccatalyst18.0 is compatible.  net9.0-macos was computed.  net9.0-macos15.0 is compatible.  net9.0-tvos was computed.  net9.0-windows was computed.  net9.0-windows7.0 is compatible. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.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
2025.2.26.1548 330 2/26/2025
2025.2.15.1301 1,179 2/15/2025
2025.1.16.1405 328 1/16/2025
2024.11.30.1709 1,328 12/13/2024
2024.11.30.617 106 12/13/2024
2024.11.28.1622 351 11/28/2024
2024.11.20.1316 468 11/21/2024
2024.11.14.1710 513 11/14/2024
2024.11.6.1222 411 11/6/2024
2024.10.28.1605 438 10/28/2024
2024.10.28.1335 407 10/28/2024
2024.10.19.1525 380 10/20/2024
2024.9.17.1417 1,313 9/17/2024
2024.9.12.1923 507 9/12/2024
2024.9.6.1352 514 9/7/2024
2024.9.4.1300 163 9/4/2024
2024.9.1.1143 515 9/1/2024
2024.8.19.1400 969 8/19/2024
2024.8.14.1256 912 8/14/2024
2024.8.12.958 528 8/12/2024
2024.8.5.1010 433 8/5/2024
2024.7.26.543 644 7/26/2024
2024.7.11.1604 484 7/11/2024
2024.7.9.1509 495 7/9/2024
2024.7.4.1424 495 7/4/2024
2024.7.3.1001 521 7/3/2024
2024.6.26.1408 901 6/28/2024
2024.6.6.1320 329 6/8/2024
2024.5.19.712 120 6/8/2024
2024.5.15.1634 324 5/15/2024
2024.5.14.829 232 5/14/2024
2024.5.13.1637 128 5/13/2024
2024.5.8.1005 268 5/8/2024
2024.4.4.2102 324 4/4/2024
2024.3.26.1111 228 3/26/2024
2024.3.19.2310 212 3/19/2024
2024.3.12.1022 230 3/12/2024
2024.3.7.836 253 3/7/2024
2024.3.6.1645 133 3/6/2024
2024.3.3.842 170 3/3/2024
2024.3.3.750 135 3/3/2024
2024.3.1.1143 148 3/1/2024
2024.2.27.1029 129 2/27/2024
2024.2.6.1959 156 2/6/2024
2023.10.12.1926 4,431 10/12/2023
2023.9.14.812 1,716 9/14/2023
2023.8.29.1040 9,366 8/29/2023
2023.8.17.903 1,843 8/17/2023
2023.8.9.1314 1,930 8/9/2023
2023.8.2.750 2,022 8/2/2023
2023.7.12.830 1,981 7/12/2023
2023.7.5.1419 2,101 7/6/2023
2023.6.14.1628 3,832 6/14/2023
2023.5.30.1640 2,518 5/30/2023
2023.5.4.1552 2,549 5/4/2023
2023.4.12.1236 6,907 4/12/2023
2023.3.14.1356 5,490 3/14/2023
2023.3.1.810 3,262 3/1/2023
2023.2.25.1185 945 2/25/2023
2023.2.22.27 5,638 2/22/2023
2023.2.15.1413 3,404 2/15/2023
2023.2.11.1628 3,405 2/11/2023
2023.1.11.534 3,698 1/11/2023
2022.12.14.648 12,818 12/14/2022
2022.11.27.1059 4,041 11/27/2022
2022.11.21.338 4,155 11/21/2022
2022.11.14.1819 4,326 11/14/2022
2022.11.14.1533 609 11/14/2022
2022.11.13.917 4,996 11/13/2022
2022.10.31.740 8,097 11/1/2022
2022.10.15.652 8,330 10/15/2022
2022.10.1.810 10,332 10/1/2022
2022.9.26.1444 10,962 9/26/2022
2022.9.14.809 9,612 9/14/2022
2022.9.8.1009 18,329 9/8/2022
2022.8.20.1007 9,791 8/20/2022
2022.8.1.1 10,053 7/31/2022
2022.7.15.841 18,934 7/15/2022
2022.7.1.1300 10,247 7/1/2022
2022.6.21.647 10,103 6/21/2022
2022.5.4.1010 36,595 5/4/2022
2022.4.10.828 29,458 4/10/2022
2022.3.26.1117 29,308 3/26/2022
2022.2.11.931 50,911 2/17/2022
2022.1.15.1312 21,048 1/17/2022
2022.1.10.537 20,134 1/10/2022
2022.1.7.1357 9,603 1/8/2022
2021.12.28.1452 11,040 12/28/2021
2021.12.15.911 10,379 12/16/2021 2021.12.15.911 is deprecated because it has critical bugs.
2021.11.19.850 38,066 11/19/2021
2021.11.11.1334 30,676 11/16/2021
2021.11.8.2109 9,032 11/9/2021
2021.11.8.1612 9,525 11/8/2021
2021.10.23.1310 52,236 10/25/2021
2021.10.13.1459 10,051 10/18/2021
2021.10.9.1116 102 10/9/2024
2021.10.9.821 481 10/10/2021
2021.9.26.1913 66,168 9/26/2021
2021.9.17.1702 15,396 9/18/2021
2021.8.30.1319 96,872 8/30/2021
2021.8.14.1600 53,615 8/16/2021
2021.8.14.829 5,699 8/14/2021
2021.8.8.1612 18,640 8/8/2021
2021.8.8.1138 447 8/8/2021
2021.7.22.1044 63,824 7/23/2021
2021.7.15.1547 10,052 7/15/2021
2021.7.12.734 9,847 7/13/2021
2021.6.26.1753 37,382 6/27/2021
2021.6.23.734 19,464 6/24/2021
2021.6.19.803 10,503 6/20/2021
2021.6.11.1600 37,553 6/13/2021
2021.6.9.1120 10,233 6/9/2021
2021.6.7.1407 2,582 6/7/2021
2021.5.28.1533 18,994 5/31/2021
2021.5.28.1451 10,202 5/31/2021
2021.5.25.1732 9,022 5/25/2021
2021.5.12.929 32,456 5/12/2021
2021.5.12.914 429 5/12/2021
2021.5.12.637 5,606 5/12/2021
2021.5.5.1901 33,332 5/6/2021
2021.5.2.1617 9,794 5/4/2021
2021.5.1.1505 10,117 5/1/2021
2021.4.28.1505 9,897 4/28/2021
2021.4.5.1653 64,028 4/5/2021
2021.4.1.913 9,983 4/1/2021
2021.3.31.1630 9,872 4/1/2021
2021.3.18.1608 10,320 3/18/2021
2021.3.3.1295 507 3/3/2021
2021.3.3.835 526 3/3/2021
2021.3.1.1205 24,828 3/2/2021
2021.3.1.1 17,191 2/27/2021
2021.2.21.1 16,656 2/21/2021
2021.2.19.3 8,990 2/20/2021
2021.2.19.2 8,737 2/19/2021
2021.2.18.2 7,774 2/19/2021
2021.2.18.1 471 2/19/2021
2021.2.16.1 17,049 2/16/2021
2021.2.10.1 38,589 2/10/2021
2021.2.9.1 7,640 2/9/2021
2021.2.8.1 497 2/9/2021
2021.2.7.1 14,483 2/6/2021
2020.12.27.1 13,887 12/27/2020
2020.12.26.3 20,239 12/27/2020
2020.12.26.2 528 12/27/2020
2020.12.24.2 550 12/26/2020
2020.12.24.1 499 12/24/2020
2020.12.18.1 7,798 12/19/2020
2020.12.15.1 14,009 12/15/2020
2020.12.14.5 13,150 12/14/2020
2020.12.14.4 7,167 12/14/2020
2020.12.14.3 6,941 12/14/2020
2020.11.27.1 68,614 11/27/2020
2020.11.25.1 13,298 11/25/2020
2020.11.23.1 523 11/25/2020
2020.11.22.2 8,858 11/23/2020
2020.11.20.1 8,107 11/21/2020
2020.11.19.3 8,171 11/19/2020
2020.11.11.1 65,385 11/11/2020
2020.10.9.5 142,299 10/9/2020
2020.10.5.1 71,993 10/5/2020
2020.10.4.1 566 10/4/2020
2020.10.1.1 19,150 10/1/2020
2020.9.24.2 24,250 9/24/2020
2020.9.12.1 50,927 9/12/2020
2020.9.8 17,738 9/8/2020
2020.9.6.5 5,395 9/6/2020
2020.9.6.4 554 9/6/2020
2020.9.6.2 1,800 9/6/2020
2020.9.3.1 14,608 9/3/2020

26 Feb 2025
- Update package references

14 November 2024
- Update to .net 9

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