Function openssl::symm::decrypt

pub fn decrypt(
    t: Cipher, 
    key: &[u8], 
    iv: Option<&[u8]>, 
    data: &[u8]
) -> Result<Vec<u8>, ErrorStack>

Decrypts data, using the specified crypter type in decrypt mode with the specified key and iv; returns the resulting (decrypted) data.