Linux cryptodev CAAM Interface - Asymmetric Cryptography

matthias_staube — Mon, 25 Nov 2019 14:56:12 GMT

Hello,

I found out through the Linux documentation that CAAM is exposed to the Linux OS via the cryptodev interface. I was able to run the openssl command line example and reproduce the speed improvement for AES-CBC.

From the documentation I gather that symmetric cryptography (AES, DES), as well as various hash algorithms are supported. However, it appears that asymmetric cryptography is not supported through the cryptodev interface, although it is supported by CAAM (correct me if I'm wrong). This raises the following questions:

Is there a specific reason for not supporting asymmetric cryptography operations (such as ECDSA signature verification) through the cryptodev interface?
Is it possible to enable support for accelerated asymmetric operations from within the Linux OS?

Thank you in advance for your insights.

Best Regards,

Matthias

SoC: i.MX 8M Quad, 4.14.98_2.0.0_ga

Re: Linux cryptodev CAAM Interface - Asymmetric Cryptography

Yuri — Tue, 26 Nov 2019 08:27:53 GMT

Hello,

I've sent some comments directly.

Have a great day,

Yuri.

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topic Linux cryptodev CAAM Interface - Asymmetric Cryptography in i.MX Processors

Linux cryptodev CAAM Interface - Asymmetric Cryptography

Re: Linux cryptodev CAAM Interface - Asymmetric Cryptography