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Append Pages from unsecured to secured pdf
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amitsri View Drop Down
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Joined: 12 Sep 11
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote amitsri Quote  Post ReplyReply Direct Link To This Post Topic: Append Pages from unsecured to secured pdf
    Posted: 12 Sep 11 at 6:19AM
Hi,

I need to append pages from one unsecured PDF to another secured PDF and want to keep all the source secured PDF's restrictions with password as it is. Please suggest me any sample code to achieve the goal. In addition, i have only open password to read the secured PDF. For further explanation, see below.

Source1 + Source2 = New

Secured PDF + Unsecured PDF = New Secured PDF with all the Secured PDF Open and Restrictions.

Thanks


Edited by amitsri - 12 Sep 11 at 6:41AM
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Rowan View Drop Down
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Points: 398 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rowan Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 11 at 7:10AM
You will want to use these two functions:

GetEncryptionFingerprint

EncryptWithFingerprint

So basically the steps are:

1. Load secured PDF
2. Get encryption details using GetEncryptionFingerprint
3. Decrypt secured PDF
4. Merge PDFs
5. Apply old security onto new merged PDF using EncryptWithFingerprint
6. Save to disk
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amitsri View Drop Down
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Thanks, I'll try and let you know soon.
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amitsri View Drop Down
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote amitsri Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 11 at 7:35AM
Hi,

I have tried as you suggested, function GetEncryptionFingerprint() returns Nothing in VB.Net. FYI, i am using Quick PDF Library 7.21. My Code steps are as followings:

Step 1: SetAdvancePassword(<open password>)
Step 2: LoadFromFile(<Filepath>)
Step 3: GetEncryptionFingerprint()

As per the SetAdvancePassword(), If the password is correct, the file will be automatically decrypted.

Thanks,
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amitsri View Drop Down
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote amitsri Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 11 at 7:51AM
Hi,

I got the encrypt finger print using following steps :

Step 1: LoadFromFile(<FilePath>)
Step 2: SetPassword(<openpassword>)
Step 3: GetEncryptionFingerprint()

I think, using SetAdvancePassword() is preventing to get the encrypt finger print.

Thanks
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amitsri View Drop Down
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Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote amitsri Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 11 at 10:02AM
Thanks for the suggestions, I have successfully merged two documents as needed.
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