https://github.com/keygen-sh/example-csharp-cryptographic-license-files

Example of verifying cryptographically signed and encrypted license files using C#, NSec, Bouncy Castle, Ed25519 and AES-256-GCM.
https://github.com/keygen-sh/example-csharp-cryptographic-license-files

Last synced: 3 months ago
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Example of verifying cryptographically signed and encrypted license files using C#, NSec, Bouncy Castle, Ed25519 and AES-256-GCM.

• Host: GitHub
• URL: https://github.com/keygen-sh/example-csharp-cryptographic-license-files
• Owner: keygen-sh
• License: mit
• Created: 2022-06-20T15:10:45.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2023-08-09T16:45:07.000Z (about 2 years ago)
• Last Synced: 2025-06-30T00:38:29.635Z (3 months ago)
• Language: C#
• Size: 15.6 KB
• Stars: 9
• Watchers: 1
• Forks: 5
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Example C# Cryptographic License Files

This is an example of how to verify and decrypt cryptographic license files in C#

and .NET, using Ed25519 and AES-256-GCM.

## Running the example

First, install dependencies with [`dotnet`](https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet):

```

dotnet restore

```

Then run the program:

```

dotnet run --pretty-print --path examples/license.lic \

  --key AFCC0A-B8C07F-F77E6C-93FB02-9FC515-V3

```

You should see log output indicating the current license file is valid as well

as its decrypted contents:

```

License file is valid! Decrypting...

License file was successfully decrypted!

Decrypted: ...

```

## Questions?

Reach out at [support@keygen.sh](mailto:support@keygen.sh) if you have any

questions or concerns!