Legato library for SHA256

Hello,

Is there any library or any commands for cryptographic software development

I want to use SHA256 to create a hash value for my file but it is giving me error as undefined.

how about using openssl?

can you provide any example, if available

root@swi-mdm9x28-wp:~# echo 123 > /tmp/data.txt
root@swi-mdm9x28-wp:~# openssl dgst -sha256 /tmp/data.txt
SHA256(/tmp/data.txt)= 181210f8f9c779c26da1d9b2075bde0127302ee0e3fca38c9a83f5b1dd8e5d3b