How can I use openssl/hmac

RE: How can I use openssl/hmac

Jeong Hyun Seok — Wed, 29 Jun 2016 07:38:41 GMT

Thanks, both of you. I use HMAC not very often. so I would like to use HMAC anyway - also, I have to follow to match counterpart engineer - who uses HMAC. @mstrouse - could you kindly share embedded version HMAC? - hard to find.

RE: How can I use openssl/hmac

mstrouse — Thu, 23 Jun 2016 16:06:26 GMT

If one looks around the inter-webs carefully, there are also fine-tuned cortex-mX asm implementations of most of those libraries / functions.

RE: How can I use openssl/hmac

Øyvind Karlsen — Thu, 23 Jun 2016 11:00:18 GMT

This is the implementation that we use in the eddystone SDK.

RE: How can I use openssl/hmac

Øyvind Karlsen — Thu, 23 Jun 2016 10:38:58 GMT

Hi,

It should be possible to make an embedded version of the hmac function, there several C sources available online. However I do not recommend it as it will have an immense runtime, causing system delays and high power consumption. Instead have a look at this blogpost on application level security using the ECB peripheral.

Best regards,

Øyvind