Scripting library?

Here's what I want to do:

I want to write a script that runs a secure computer that generates pairs of bitcoin addresses and private keys; a manageable amount like 1000.

I want the script to write two files, one with just the addresses, and the other with both that is stored securely.

The idea is to upload the pool of addresses to a web server, and a present each customer with a unique bitcoin address to send payment. When the order is received, the corresponding private key is imported into a hot wallet under supervision, then swept into a cold-storage address.

I'd like to reseed the PRNG between each iteration with hashed data from a random source such as a freshly recorded audio file or jpg image that is later destroyed.

I'd like to write my script in Perl, but any common scripting language would work. Is there a trusted/good set of libraries to do this?