OpenSSL using EVP vs. algorithm API for symmetric crypto

Question

Hi i have installed openssl on my linux machine and going through the header files and documentation (which is highly insufficint :( ).

i am trying to build a projec

Answer 1

Currently OpenSSL wiki has good documentation on how to use the EVP family of functions: http://wiki.openssl.org/index.php/EVP

The other upside of using the EVP over algorithm API is that EVP will automatically use hardware acceleration (like AES-NI instruction set) if available. With algorithm API you need to enable it manually.