An Introduction to Mutual SSL Authentication

Elvin Cheng

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8 Feb 2012CPOL7 min read

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Provides a brief introduction to mutual SSL authentication and its handshake messages

As a developer, if you're interested in developing or be able to debug the mutual SSL authentication effectively, it can be very useful to understand the intricacies of the handshake messages happening under the hood. This article looks at SSL authentication (server --> client), Mutual SSL Authentication (server client), and has a demo project to help explain the theory.

MutualSslDemo.zip
- MutualSslDemo
  - Certificates
    - MyClient.cer
    - MyClient.pfx
    - MyClient.pvk
    - MyClient.spc
    - MyServer.cer
    - MyServer.pfx
    - MyServer.pvk
    - MyServer.spc
  - MutualSslDemo.sln
  - MutualSslDemo.sln.docstates.suo
  - MutualSslDemo.suo
  - MyClient
    - app.config
    - MyClient.csproj
    - MyClient.pfx
    - Program.cs
    - Properties
      - AssemblyInfo.cs
  - MyServer
    - app.config
    - MyServer.csproj
    - MyServer.pfx
    - Program.cs
    - Properties
      - AssemblyInfo.cs

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("MyServer")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("Code Project")]
[assembly: AssemblyProduct("MyServer")]
[assembly: AssemblyCopyright("Copyright © Code Project 2012")]
[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)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("21821128-4126-4c67-a8d5-f9f72a63d55b")]

// 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")]

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By

Elvin Cheng

Singapore

Elvin Cheng is currently living in Woodlands, Singapore. He has been developing applications with the .NET Framework, using C# and ASP.NET since October 2002. Elvin specializes in building Real-time monitoring and tracking information system for Semi-conductor manufacturing industry. During his spare time, he enjoys reading books, watching movie and gym.

An Introduction to Mutual SSL Authentication

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