isr_admin: Eliminate use of openssl command-line tool
isr_admin: Eliminate use of openssl command-line tool

- Use blobtool for ciphers and hashing rather than openssl command-line
tool

- In makeparcel(), use blobtool rather than zlib tool

- In keygen(), use /dev/urandom and MIME::Base64 rather than
"openssl rand"

- In makeparcel(), use pack() rather than system("dd if=/dev/zero")

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr