Reduce memory footprints in mbedtls

pritesh_shah — Wed, 15 Apr 2020 10:25:45 GMT

Hello,

I want to reduce the memory footprint of mbedtls library. I found the below link to optimize the mbedtls.

https://tls.mbed.org/kb/how-to/reduce-mbedtls-memory-and-storage-footprint

In this document one of the option is to save memory is to use mbedtls_x509_crt_parse_der_nocopy() function

instead of mbedtls_x509_crt_parse_der().

I have downloaded an SDK for Kinetis K64 and in that, i didn't found the mbedtls_x509_crt_parse_der_nocopy() function in mbedtls.

Is there any upgrade in the package ? How can i reduce the memory footprints for mbedtls. ?

Re: Reduce memory footprints in mbedtls

kerryzhou — Thu, 16 Apr 2020 04:32:03 GMT

Hi Pritesh shah ,

From the kinetis SDK x509_crt.c , this frile is part of mebd TSL(SSL Library mbed TLS / PolarSSL ).

So, if you want to get the mbedtls_x509_crt_parse_der_nocopy() API, you may go the mbed side, find the newest driver which contains mbedtls_x509_crt_parse_der_nocopy() api function, and copy it to the SDK code.

The newest SDK still didn't add the API which you mentione, but I think you can add it by yoursefl.

Wish it helps you!

Kerry

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Reduce memory footprints in mbedtls

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