MD5 hardware accelerator example

[davdav]

Hi all,

I would like to use hardware accelerator to compute an MD5 hash but I can't find any example.

Did someone use it?

Thanks

[ESP_Angus]

There is no hardware accelerator for MD5 in ESP32, only SHA1 & SHA2.

There are a set of MD5 functions in the ROM which can be used to calculate MD5 in software (with minimal code overhead in flash):
https://github.com/espressif/esp-idf/bl ... hash.h#L24

MD5 is not particularly CPU intensive, so these are quite fast.

[davdav]

Thanks @ESP_Angus,

I have found MD5 function in mbedTLS component

https://github.com/espressif/mbedtls/bl ... dtls/md5.h

If you think that ROM function are better, I will switch to them.

[ESP_Angus]

If you think that ROM function are better, I will switch to them.

They'll be slightly faster because they run from ROM, but there's no significant difference between them.