Unicode C++ Requires Chilkat v11.7.0+

Remove the Password and Encryption from a PDF

See more PDF Protection Examples

Demonstrates the removeEncryption operation, which saves the PDF with no encryption at all: no password, no restrictions. It needs owner rights, so the PDF is loaded with its owner password. As with every Protection operation, the change is applied when the file is written. Unicode C++

#include <CkPdfW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  The PDF used in this example is available at encrypted_user_password.pdf

    CkPdfW pdf;

    //  Removing the encryption needs owner rights: load with the owner password.
    pdf.put_OwnerPassword(L"owner-secret");
    success = pdf.LoadFile(L"qa_data/pdf/encrypted_user_password.pdf");
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    CkJsonObjectW json;
    CkJsonObjectW jsonOut;
    success = pdf.Protection(L"getInfo",json,jsonOut);
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    wprintf(L"encrypted, as loaded: %d\n",jsonOut.BoolOf(L"loaded.encrypted"));
    wprintf(L"algorithm: %s\n",jsonOut.stringOf(L"loaded.algorithm"));

    success = pdf.Protection(L"removeEncryption",json,jsonOut);
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    wprintf(L"will be saved encrypted: %d\n",jsonOut.BoolOf(L"pending.encrypted"));

    success = pdf.WriteFile(L"qa_output/minutes_unprotected.pdf");
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    //  The result is an ordinary PDF that opens without a password.
    CkPdfW reader;
    CkJsonObjectW info;
    success = reader.PreLoadCheck(L"qa_output/minutes_unprotected.pdf",info);
    if (success == false) {
        wprintf(L"%s\n",reader.lastErrorText());
        return;
    }

    wprintf(L"encrypted: %d\n",info.BoolOf(L"encrypted"));
    success = reader.LoadFile(L"qa_output/minutes_unprotected.pdf");
    if (success == false) {
        wprintf(L"%s\n",reader.lastErrorText());
        return;
    }

    wprintf(L"pages: %d\n",reader.get_NumPages());

    //  Sample output:

    //  encrypted, as loaded: True
    //  algorithm: rc4-128
    //  will be saved encrypted: False
    //  encrypted: False
    //  pages: 1
    }