Generating password protected pdf document usuing as_pdf_mini package

Question

Actually i want to implement password protected pdf file which is generated using as_pdf_mini.
so i want help on that.....

Answer 1

- Read the specs on PDF 1.3
- take as_pdf3
- the next is some code I used to check several steps of the encryption
declare
  t_encryption_padding raw(32) := hextoraw( '28BF4E5E4E758A4164004E56FFFA01082E2E00B6D0683E802F0CA9FE6453697A' );
  p_owner_password varchar2(32) := '';
  p_user_password varchar2(32) := 'abc';
  t_tmp raw(32);
  t_tmp_u raw(32);
  t_o raw(320);
  t_u raw(320);
begin
  t_tmp_u := utl_raw.substr( utl_raw.concat( utl_raw.cast_to_raw( p_user_password ), t_encryption_padding), 1, 32 );
  if p_owner_password is null
  then
    t_tmp := t_tmp_u;
  else
    t_tmp := utl_raw.substr( utl_raw.concat( utl_raw.cast_to_raw( p_owner_password ), t_encryption_padding), 1, 32 );
  end if;
  t_tmp := dbms_crypto.hash( t_tmp, dbms_crypto.hash_md5 );
  t_o := dbms_crypto.encrypt( t_tmp_u, dbms_crypto.encrypt_rc4, utl_raw.substr( t_tmp, 1, 5 ) );
--dbms_output.put_line( t_o );
  t_tmp := dbms_crypto.hash( utl_raw.concat( t_tmp_u
                                           , t_o
                                           , utl_raw.cast_from_binary_integer( -4, utl_raw.little_endian )  -- waarde van /P
                                           , hextoraw( 'fb3642e78f13a14ef522287f16d63195' ) -- waarde van /ID
                           , dbms_crypto.hash_md5
  t_u := dbms_crypto.encrypt( t_encryption_padding, dbms_crypto.encrypt_rc4,  utl_raw.substr( t_tmp, 1, 5 ) );
--dbms_output.put_line( t_u );
  t_tmp := utl_raw.concat( utl_raw.substr( t_tmp, 1, 5 )
                         , utl_raw.substr( utl_raw.cast_from_binary_integer( 8, utl_raw.little_endian ), 1, 3 ) -- object nr
                         , utl_raw.substr( utl_raw.cast_from_binary_integer( 0, utl_raw.little_endian ), 1, 2 ) -- generation nr
  t_tmp := dbms_crypto.hash( t_tmp, dbms_crypto.hash_md5 );
  dbms_output.put_line( dbms_crypto.encrypt( 'FEFF', dbms_crypto.encrypt_rc4,  utl_raw.substr( t_tmp, 1, 10 ) ) );
  dbms_output.put_line( dbms_crypto.encrypt( utl_raw.cast_to_raw( 'AS-PDF 0.3.0 by Anton Scheffer' ), dbms_crypto.encrypt_rc4,  utl_raw.substr( t_tmp, 1, 10 ) ) );
end;Anton