Question

i have application with client-server architecture.

client (C program):

1. generate various DER encoded data
2. convert DER to PEM (using openssl’s PEM_write_bio) with various PEM header
3. send PEM to server

server (Perl script):

1. receive PEM data
2. convert PEM to DER
3. ….

My question is how to convert various PEM data to DER/BER (binary data) in perl?

Answer 1

You can strip off the PEM tags yourself, and do a decode of the Base64 block inside using MIME::Base64.

Should be as simple as

$derBlob = decode_base64($base64Blob);