require 'digest/sha1'
require 'base64'
'{SHA}' + Base64.encode64(Digest::SHA1.digest(password))

Crypt

$ openssl passwd -crypt myPassword
$ openssl passwd -crypt -salt rq myPassword
$ htpasswd -nbd myName myPassword

MD5

$ openssl passwd -apr1 -salet r31..... myPassword
$ openssl passwd -apr1 myPassword
$ htpasswd -nbm myName myPassword

SHA1

$ htpasswd -nbs myName myPassword

To be done.