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Can I UnEncrypt PDF File?

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    Can I UnEncrypt PDF File?

    Is it possible to unencrypt a pdf file? I am trying to append one pdf to another... but, if the first pdf is encrypted it won't append. If that's not possible... is it possible to check to see if a pdf file is encrypted? Thanks!

    Don

    #2
    Re: Can I UnEncrypt PDF File?

    Haven't found an answer yet... but my workaround has been to create an on_error_goto error handler. It doesn't append the file, but at least the user doesn't see a confusing(to the user) Alpha Five error message.

    Comment


      #3
      Re: Can I UnEncrypt PDF File?

      If you are creating the PDF's and appending them to a single PDF - can you encrypt AFTER the append is finshed?
      Cole Custom Programming - Terrell, Texas
      972 524 8714
      [email protected]

      ____________________
      "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

      Comment


        #4
        Re: Can I UnEncrypt PDF File?

        Originally posted by djldc View Post
        Is it possible to unencrypt a pdf file?
        Depends on how it was encrypted.

        Comment


          #5
          Re: Can I UnEncrypt PDF File?

          Depends on how it was encrypted.
          I am curious as well....Alpha has the encryption function PDF_ENCRYPT(), but I cannot find the corollary function that would decrypt it....would think if you have one you'd have the other. Tried various ways to see if there is an undocumented function for this but notta.
          Mike
          __________________________________________
          It is only when we forget all our learning that we begin to know.
          It's not what you look at that matters, it's what you see.
          Henry David Thoreau
          __________________________________________



          Comment


            #6
            Re: Can I UnEncrypt PDF File?

            encrypt_string()
            decrypt_string()

            Comment


              #7
              Re: Can I UnEncrypt PDF File?

              encrypt_string()
              decrypt_string()
              My point exactly.....where is PDF_DECRYPT() ?
              Mike
              __________________________________________
              It is only when we forget all our learning that we begin to know.
              It's not what you look at that matters, it's what you see.
              Henry David Thoreau
              __________________________________________



              Comment


                #8
                Re: Can I UnEncrypt PDF File?

                Mike,

                All the pdf_encrypt() does is to allow you to take a pdf file, likely one you have generated in Alpha as part of your application, and add restrictions as to whether or not the end user can

                print it
                modify it
                copy text from it
                add notes

                unless they have the password. Since your application likely generated the file, it can be regenerated without the encryption. The need for decrypting seems unlikely.
                There can be only one.

                Comment


                  #9
                  Re: Can I UnEncrypt PDF File?

                  No clue really as I have not had to deal with PDF encryption, but....Don's problem is
                  but, if the first pdf is encrypted it won't append
                  . Apparently it can cause an issue in doing what he is attempting.
                  Mike
                  __________________________________________
                  It is only when we forget all our learning that we begin to know.
                  It's not what you look at that matters, it's what you see.
                  Henry David Thoreau
                  __________________________________________



                  Comment


                    #10
                    Re: Can I UnEncrypt PDF File?

                    Thus Martin's suggestion. Don't encrypt until they are appended.

                    We can do what we need within Alpha with Alpha generated files. If he's trying to append to a non Alpha pdf and doesn't have the ability have that file not be encrypted, there are supposed password cracking programs.

                    Don hasn't responded in a while. I vote we let the matter drop.
                    There can be only one.

                    Comment


                      #11
                      Re: Can I UnEncrypt PDF File?

                      You encrypt first
                      decrypt second
                      save as pdf third

                      Comment


                        #12
                        Re: Can I UnEncrypt PDF File?

                        It also depends on how it was encrypted. If done by another program, you may need to run some OLE to decrypt it.

                        I had to do that once - not sure where it is but will look for it if that's the case. However, if your program is different than the one I was working with (I don't have the license - it belongs to the customer), the exact syntax would probably be different anyway. In other words, the secret may be to find the program used to create the encryption and find out what they recommend.

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