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Pkcs11Interop

Managed .NET wrapper for unmanaged PKCS#11 libraries

PLEASE NOTE: If your application only needs to perform signing or encryption with RSA or EC keys, consider using the Pkcs11Interop.X509Store library. It offers a simpler and more developer-friendly alternative to the full Pkcs11Interop library. Additionally, it includes providers that easily integrate with other built-in .NET classes such as SignedCms and SignedXml.

Overview

PKCS#11 is a cryptographic standard maintained by the OASIS PKCS 11 Technical Committee (originally published by RSA Laboratories). It defines an ANSI C API to access smart cards and other types of cryptographic hardware.

Pkcs11Interop is a managed library written in C# that brings the full power of the PKCS#11 API to the .NET environment. It loads the unmanaged PKCS#11 library provided by the cryptographic device vendor and makes its functions accessible to .NET applications.

The following figure illustrates the typical usage of the Pkcs11Interop library in a .NET application:

Pkcs11Interop architecture

The Pkcs11Interop library:

Implements a .NET wrapper for unmanaged PKCS#11 libraries.
Is compliant with the PKCS#11 v2.40 specification and the PKCS#11 URI scheme defined in RFC 7512.
Is compatible with .NET Framework 2.0 and higher, .NET Core, Mono, and Xamarin.
Is supported on Windows, Linux, macOS, Android, and iOS.
Is supported on both 32-bit and 64-bit platforms.
Is open source and completely free for commercial use.
Is used in production by several information security and financial organizations.
Uses 100% managed and fully documented code.
Contains code samples covering all methods of the PKCS#11 API.

Pkcs11Interop has been confirmed to work with the following devices:

Atos CardOS (formerly Siemens CardOS) smartcard
Thales nShield Solo (formerly nCipher nShield) HSM
SoftHSM (virtual HSM from the OpenDNSSEC project)
Feitian ePass 2003 token
SafeNet ProtectServer HSM
SafeNet Luna SA HSM
Utimaco CryptoServer HSM
Belgian and Slovak eID cards
SmartCard-HSM
YubiKey with the PIV application

Documentation

The Pkcs11Interop API is fully documented with inline XML documentation, which is displayed by most modern IDEs during application development.

Before you start using Pkcs11Interop, it is highly recommended that you familiarize yourself with at least the following chapters of the PKCS#11 v2.20 specification (or equivalent chapters of any previous or subsequent specification versions):

Chapter 2 - Scope
Chapter 6 - General Overview
Chapter 10 - Objects

The following topics are covered by standalone documents:

Download

Official NuGet packages are published in the nuget.org repository.
Archives containing the source code and binaries can be downloaded from our releases page.
All official items are signed with the GnuPG key or code-signing certificate of Jaroslav Imrich and announced via the public mailing list.

License

Pkcs11Interop is available under the terms of the Apache License, Version 2.0.
A human-friendly license summary is available on tldrlegal.com, but the full license text always prevails.

Support

If you need help, please choose one of the options that best suits your needs:

Public issue tracker available on GitHub.
Questions with the pkcs#11 tag and pkcs11interop tag posted on StackOverflow.
Commercial support and consulting from the original developer available upon request at info@pkcs11interop.net.

Related Projects

Pkcs11Admin
GUI tool for administration of PKCS#11 enabled devices based on Pkcs11Interop library.
PKCS11-LOGGER
PKCS#11 logging proxy module useful for debugging of PKCS#11 enabled applications.
SoftHSM2-for-Windows
Pure software implementation of a cryptographic store accessible through a PKCS#11 interface.
Bouncy HSM
HSM and smartcard simulator with HTML UI, REST API and PKCS#11 interface.

About

Pkcs11Interop has been written by Jaroslav Imrich.
Please visit project website - pkcs11interop.net - for more information.