Am 01.08.2022 um 06:37 schrieb Damaji Kalunge:
Hello Team,
Is there any way to get the original encryption algorithm and password via
code ?
The encryption algorithm used depends on the settings in the encryption
directory (see the PDF specification). To get the password you'll have
to use a password cracker. Don't do it if it is illegal in your country,
and be aware that this type of software is sometimes malicious.
Tilman
Thanks
Damaji
On 2022/07/26 18:39:36 Tilman Hausherr wrote:
Am 26.07.2022 um 12:22 schrieb Damaji Kalunge:
Hi Team,
We have encrypted Editable PDF and our requirement is to fill that
editable pdf by preserving the same encryption.
Approach :
Step 1:
- Read PDF File .
- if encrypted remove encryption
- pDDocument.setAllSecurityToBeRemoved(true);
- Fill the editable PDF using *PDAcroForm*
- Save *filled editable PDF*
- Step 2:
- Read Filled editable PDF file.
-
*Want add encryption/permission same as original PDF *
- *save filled editable PDF with original *
*encryption/permission . *
Can you please help out with this using Apache PDFBOX ?
You need to know what the original encryption was, and reuse the
passwords (user and owner).
An alternative would be to use incremental saving, but this is tricky as
it requires some knowledge of the COS model.
See the testSaveIncrementalAfterSign method in TestCreateSignature.java
in the source code download.
Tilman
Thanks
Damaji
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