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Implement --remove-restrictions (fixes #833)
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@ -1,3 +1,8 @@
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2023-01-28 Jay Berkenbilt <ejb@ql.org>
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* New option --remove-restrictions removes security restrictions
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from digitally signed files. Fixes #833.
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2023-01-09 Jay Berkenbilt <ejb@ql.org>
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2023-01-09 Jay Berkenbilt <ejb@ql.org>
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* Bug fix: flatten annotations should handle a page with no
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* Bug fix: flatten annotations should handle a page with no
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@ -685,6 +685,10 @@ class QPDF
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// this file
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// this file
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QPDF_DLL
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QPDF_DLL
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std::string getEncryptionKey() const;
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std::string getEncryptionKey() const;
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// Remove security restrictions associated with digitally signed
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// files.
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QPDF_DLL
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void removeSecurityRestrictions();
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// Linearization support
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// Linearization support
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@ -2777,3 +2777,14 @@ QPDF::everPushedInheritedAttributesToPages() const
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{
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{
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return this->m->ever_pushed_inherited_attributes_to_pages;
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return this->m->ever_pushed_inherited_attributes_to_pages;
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}
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}
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void
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QPDF::removeSecurityRestrictions()
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{
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auto root = getRoot();
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root.removeKey("/Perms");
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auto acroform = root.getKey("/AcroForm");
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if (acroform.isDictionary() && acroform.hasKey("/SigFlags")) {
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acroform.replaceKey("/SigFlags", QPDFObjectHandle::newInteger(0));
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}
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}
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@ -2333,6 +2333,9 @@ QPDFJob::handleTransformations(QPDF& pdf)
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afdh = std::make_shared<QPDFAcroFormDocumentHelper>(pdf);
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afdh = std::make_shared<QPDFAcroFormDocumentHelper>(pdf);
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}
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}
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};
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};
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if (m->remove_restrictions) {
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pdf.removeSecurityRestrictions();
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}
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if (m->externalize_inline_images ||
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if (m->externalize_inline_images ||
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(m->optimize_images && (!m->keep_inline_images))) {
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(m->optimize_images && (!m->keep_inline_images))) {
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for (auto& ph: dh.getAllPages()) {
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for (auto& ph: dh.getAllPages()) {
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@ -8,6 +8,17 @@ For a detailed list of changes, please see the file
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.. x.y.z: not yet released
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.. x.y.z: not yet released
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11.3.0: not yet released
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- CLI Enhancements
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- New option :qpdf:ref:`--remove-restrictions` removes security
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restrictions from digitally signed files.
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- Library enhancements
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- New method ``QPDF::removeSecurityRestrictions`` removes security
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restrictions from digitally signed files.
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11.2.0: November 20, 2022
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11.2.0: November 20, 2022
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- Build changes
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- Build changes
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BIN
qpdf/qtest/qpdf/minimal-signed-restricted.pdf
Normal file
BIN
qpdf/qtest/qpdf/minimal-signed-restricted.pdf
Normal file
Binary file not shown.
2324
qpdf/qtest/qpdf/minimal-signed-restrictions-removed.pdf
Normal file
2324
qpdf/qtest/qpdf/minimal-signed-restrictions-removed.pdf
Normal file
File diff suppressed because one or more lines are too long
@ -128,5 +128,16 @@ foreach my $i (qw(40 128 256))
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$td->EXIT_STATUS => 0});
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$td->EXIT_STATUS => 0});
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}
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}
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$n_tests += 2;
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$td->runtest("remove security restrictions",
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{$td->COMMAND =>
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"qpdf --qdf --no-original-object-ids --static-id" .
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" --remove-restrictions minimal-signed-restricted.pdf a.pdf"},
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{$td->STRING => "", $td->EXIT_STATUS => 0},
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$td->NORMALIZE_NEWLINES);
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$td->runtest("checkout output (remove restrictions)",
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{$td->FILE => "a.pdf"},
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{$td->FILE => "minimal-signed-restrictions-removed.pdf"});
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cleanup();
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cleanup();
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$td->report($n_tests);
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$td->report($n_tests);
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