The Bouncy Castle Cryptography library is a popular open source .NET implementation of cryptographic algorithms and protocols. https://github.com/bcgit/bc-csharp Installing Bouncy Castle libraries NuGet Package Manager > Package Manager Console Enter the command: Install-Package BouncyCastle.Cryptography
Category: Bouncy Castle library
Decrypt smime encrypted file
A file encrypted using the following openssl command: Decrypt the file