When i need this i use https://metacpan.org/pod/MIME::Base64. As in 

use MIME::Base64;
$buf='Authorization: Basic '.encode_base64($args{user}.':'.$args{passw
+ord},'');

[download]
Note the second parm of the empty string.
Pass an empty string as second argument if you do not want the encoded string to be broken into lines.

In reply to Re: Question about base64 encoded attributes with Net::LDAP::LDIF by huck
in thread Question about base64 encoded attributes with Net::LDAP::LDIF by steiner

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