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Editorial Team
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Asked: 2026-05-25T09:51:09+00:00

Like the title says, I’m looking for an HMAC-SHA1 implementation for C#. This will

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Like the title says, I’m looking for an HMAC-SHA1 implementation for C#. This will run under the micro framework, so I can’t use the built in System.Security.Cryptography classes.

I have no problem porting a library, if I can understand the original code. I’ve found the source for one in Javascript and verified that it matched expected values, but I’m having trouble porting because I can’t always tell what types the values are.

So anyone know of any C# (or Java (or other strongly typed)) implementations out there?

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  1. Editorial Team

    The Bouncycastle C# crypto library contains liberally licensed C# source code. It should be trivial to extract the Org.BouncyCastle.Crypto.Digests.Sha1Digest and Org.BouncyCastle.Crypto.Macs.HMac classes and incorporate them into your code. It doesn’t appear to have any dependence on those .NET classes, but I don’t know what classes are included in the micro framework.

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