CAM::PDF::Decrypt - PDF security helper
my $pdf = CAM::PDF->new($filename);
This class is used invisibly by CAM::PDF whenever it detects that a document is encrypted. See new(), getPrefs() and setPrefs() in that module.
Create and validate a new decryption object. If this fails, it will set $CAM::PDF::errstr and return undef.
$prompt is a boolean that says whether the user should be prompted for a password on the command line.
Given a binary encoded permissions string from a PDF document, return the four individual boolean fields as an array:
Given four booleans, pack them into a single field in the PDF style that decode_permissions can understand. Returns that scalar.
Change the PDF passwords to the specified values. When the PDF is output, it will be encrypted with the new passwords.
PERMISSIONS is an optional scalar of the form that decode_permissions can understand. If not specified, the existing values will be retained.
Note: we only support writing using encryption version 1, even though we can read encryption version 2 as well.
Encrypt the scalar using the passwords previously specified.
Decrypt the scalar using the passwords previously specified.
To install CAM::PDF, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.