OpenSystemsDevelopment / qpdf

Commit ef14676bfb0b4674facc305e1df8ac00af84f5b2

Authored by m-holger
Committed by GitHub
2 parents f4e29052 023a0027

Merge pull request #1529 from m-holger/nnt 

Add stricter name/number tree validation
Inline Side-by-side
Showing 17 changed files with 1690 additions and 99 deletions
include/qpdf/QPDFEmbeddedFileDocumentHelper.hh
  View file @ef14676
@@ -67,19 +67,7 @@ class QPDFEmbeddedFileDocumentHelper: public QPDFDocumentHelper @@ -67,19 +67,7 @@ class QPDFEmbeddedFileDocumentHelper: public QPDFDocumentHelper
67 private: 67 private:
68 void initEmbeddedFiles(); 68 void initEmbeddedFiles();
69 69
70 - class Members  
71 - {  
72 - friend class QPDFEmbeddedFileDocumentHelper;  
73 -  
74 - public:  
75 - ~Members() = default;  
76 -  
77 - private:  
78 - Members() = default;  
79 - Members(Members const&) = delete;  
80 -  
81 - std::shared_ptr<QPDFNameTreeObjectHelper> embedded_files;  
82 - }; 70 + class Members;
83 71
84 std::shared_ptr<Members> m; 72 std::shared_ptr<Members> m;
85 }; 73 };
include/qpdf/QPDFNameTreeObjectHelper.hh
  View file @ef14676
@@ -45,6 +45,19 @@ class QPDF_DLL_CLASS QPDFNameTreeObjectHelper: public QPDFObjectHelper @@ -45,6 +45,19 @@ class QPDF_DLL_CLASS QPDFNameTreeObjectHelper: public QPDFObjectHelper
45 QPDF_DLL 45 QPDF_DLL
46 QPDFNameTreeObjectHelper(QPDFObjectHandle, QPDF&, bool auto_repair = true); 46 QPDFNameTreeObjectHelper(QPDFObjectHandle, QPDF&, bool auto_repair = true);
47 47
  48 + QPDF_DLL
  49 + QPDFNameTreeObjectHelper(
  50 + QPDFObjectHandle,
  51 + QPDF&,
  52 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  53 + bool auto_repair);
  54 +
  55 + // Validate the name tree. Returns true if the tree is valid.
  56 + //
  57 + // If the tree is not valid and auto_repair is true, attempt to repair the tree.
  58 + QPDF_DLL
  59 + bool validate(bool repair = true);
  60 +
48 // Create an empty name tree 61 // Create an empty name tree
49 QPDF_DLL 62 QPDF_DLL
50 static QPDFNameTreeObjectHelper newEmpty(QPDF&, bool auto_repair = true); 63 static QPDFNameTreeObjectHelper newEmpty(QPDF&, bool auto_repair = true);
@@ -171,7 +184,11 @@ class QPDF_DLL_CLASS QPDFNameTreeObjectHelper: public QPDFObjectHelper @@ -171,7 +184,11 @@ class QPDF_DLL_CLASS QPDFNameTreeObjectHelper: public QPDFObjectHelper
171 ~Members() = default; 184 ~Members() = default;
172 185
173 private: 186 private:
174 - Members(QPDFObjectHandle& oh, QPDF&, bool auto_repair); 187 + Members(
  188 + QPDFObjectHandle& oh,
  189 + QPDF&,
  190 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  191 + bool auto_repair);
175 Members(Members const&) = delete; 192 Members(Members const&) = delete;
176 193
177 std::shared_ptr<NNTreeImpl> impl; 194 std::shared_ptr<NNTreeImpl> impl;
include/qpdf/QPDFNumberTreeObjectHelper.hh
  View file @ef14676
@@ -44,6 +44,13 @@ class QPDF_DLL_CLASS QPDFNumberTreeObjectHelper: public QPDFObjectHelper @@ -44,6 +44,13 @@ class QPDF_DLL_CLASS QPDFNumberTreeObjectHelper: public QPDFObjectHelper
44 QPDFNumberTreeObjectHelper(QPDFObjectHandle, QPDF&, bool auto_repair = true); 44 QPDFNumberTreeObjectHelper(QPDFObjectHandle, QPDF&, bool auto_repair = true);
45 45
46 QPDF_DLL 46 QPDF_DLL
  47 + QPDFNumberTreeObjectHelper(
  48 + QPDFObjectHandle,
  49 + QPDF&,
  50 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  51 + bool auto_repair);
  52 +
  53 + QPDF_DLL
47 ~QPDFNumberTreeObjectHelper() override; 54 ~QPDFNumberTreeObjectHelper() override;
48 55
49 // Create an empty number tree 56 // Create an empty number tree
@@ -52,6 +59,12 @@ class QPDF_DLL_CLASS QPDFNumberTreeObjectHelper: public QPDFObjectHelper @@ -52,6 +59,12 @@ class QPDF_DLL_CLASS QPDFNumberTreeObjectHelper: public QPDFObjectHelper
52 59
53 typedef long long int numtree_number; 60 typedef long long int numtree_number;
54 61
  62 + // Validate the name tree. Returns true if the tree is valid.
  63 + //
  64 + // If the tree is not valid and auto_repair is true, attempt to repair the tree.
  65 + QPDF_DLL
  66 + bool validate(bool repair = true);
  67 +
55 // Return overall minimum and maximum indices 68 // Return overall minimum and maximum indices
56 QPDF_DLL 69 QPDF_DLL
57 numtree_number getMin(); 70 numtree_number getMin();
@@ -188,7 +201,11 @@ class QPDF_DLL_CLASS QPDFNumberTreeObjectHelper: public QPDFObjectHelper @@ -188,7 +201,11 @@ class QPDF_DLL_CLASS QPDFNumberTreeObjectHelper: public QPDFObjectHelper
188 ~Members() = default; 201 ~Members() = default;
189 202
190 private: 203 private:
191 - Members(QPDFObjectHandle& oh, QPDF&, bool auto_repair); 204 + Members(
  205 + QPDFObjectHandle& oh,
  206 + QPDF&,
  207 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  208 + bool auto_repair);
192 Members(Members const&) = delete; 209 Members(Members const&) = delete;
193 210
194 std::shared_ptr<NNTreeImpl> impl; 211 std::shared_ptr<NNTreeImpl> impl;
include/qpdf/QPDFOutlineDocumentHelper.hh
  View file @ef14676
@@ -63,33 +63,13 @@ class QPDFOutlineDocumentHelper: public QPDFDocumentHelper @@ -63,33 +63,13 @@ class QPDFOutlineDocumentHelper: public QPDFDocumentHelper
63 { 63 {
64 friend class QPDFOutlineObjectHelper; 64 friend class QPDFOutlineObjectHelper;
65 65
66 - static bool  
67 - checkSeen(QPDFOutlineDocumentHelper& dh, QPDFObjGen og)  
68 - {  
69 - return !dh.m->seen.add(og);  
70 - } 66 + static bool checkSeen(QPDFOutlineDocumentHelper& dh, QPDFObjGen og);
71 }; 67 };
72 68
73 private: 69 private:
74 void initializeByPage(); 70 void initializeByPage();
75 71
76 - class Members  
77 - {  
78 - friend class QPDFOutlineDocumentHelper;  
79 -  
80 - public:  
81 - ~Members() = default;  
82 -  
83 - private:  
84 - Members() = default;  
85 - Members(Members const&) = delete;  
86 -  
87 - std::vector<QPDFOutlineObjectHelper> outlines;  
88 - QPDFObjGen::set seen;  
89 - QPDFObjectHandle dest_dict;  
90 - std::shared_ptr<QPDFNameTreeObjectHelper> names_dest;  
91 - std::map<QPDFObjGen, std::vector<QPDFOutlineObjectHelper>> by_page;  
92 - }; 72 + class Members;
93 73
94 std::shared_ptr<Members> m; 74 std::shared_ptr<Members> m;
95 }; 75 };
include/qpdf/QPDFPageLabelDocumentHelper.hh
  View file @ef14676
@@ -77,19 +77,7 @@ class QPDFPageLabelDocumentHelper: public QPDFDocumentHelper @@ -77,19 +77,7 @@ class QPDFPageLabelDocumentHelper: public QPDFDocumentHelper
77 std::vector<QPDFObjectHandle>& new_labels); 77 std::vector<QPDFObjectHandle>& new_labels);
78 78
79 private: 79 private:
80 - class Members  
81 - {  
82 - friend class QPDFPageLabelDocumentHelper;  
83 -  
84 - public:  
85 - ~Members() = default;  
86 -  
87 - private:  
88 - Members() = default;  
89 - Members(Members const&) = delete;  
90 -  
91 - std::shared_ptr<QPDFNumberTreeObjectHelper> labels;  
92 - }; 80 + class Members;
93 81
94 std::shared_ptr<Members> m; 82 std::shared_ptr<Members> m;
95 }; 83 };
libqpdf/NNTree.cc
  View file @ef14676
@@ -141,8 +141,8 @@ NNTreeIterator::increment(bool backward) @@ -141,8 +141,8 @@ NNTreeIterator::increment(bool backward)
141 impl.warn(node, "items array doesn't have enough elements"); 141 impl.warn(node, "items array doesn't have enough elements");
142 } else if (!impl.details.keyValid(items[item_number])) { 142 } else if (!impl.details.keyValid(items[item_number])) {
143 impl.warn(node, ("item " + std::to_string(item_number) + " has the wrong type")); 143 impl.warn(node, ("item " + std::to_string(item_number) + " has the wrong type"));
144 - } else if (!items[item_number + 1]) {  
145 - impl.warn(node, "item " + std::to_string(item_number) + " is null"); 144 + } else if (!impl.value_valid(items[item_number + 1])) {
  145 + impl.warn(node, "item " + std::to_string(item_number + 1) + " is invalid");
146 } else { 146 } else {
147 return; 147 return;
148 } 148 }
@@ -386,6 +386,9 @@ NNTreeIterator::insertAfter(QPDFObjectHandle const&amp; key, QPDFObjectHandle const&amp; @@ -386,6 +386,9 @@ NNTreeIterator::insertAfter(QPDFObjectHandle const&amp; key, QPDFObjectHandle const&amp;
386 if (!(key && value)) { 386 if (!(key && value)) {
387 impl.error(node, "insert: key or value is null"); 387 impl.error(node, "insert: key or value is null");
388 } 388 }
  389 + if (!impl.value_valid(value)) {
  390 + impl.error(node, "insert: value is invalid");
  391 + }
389 items.insert(item_number + 2, key); 392 items.insert(item_number + 2, key);
390 items.insert(item_number + 3, value); 393 items.insert(item_number + 3, value);
391 resetLimits(node, lastPathElement()); 394 resetLimits(node, lastPathElement());
@@ -621,10 +624,15 @@ NNTreeIterator::deepen(QPDFObjectHandle a_node, bool first, bool allow_empty) @@ -621,10 +624,15 @@ NNTreeIterator::deepen(QPDFObjectHandle a_node, bool first, bool allow_empty)
621 } 624 }
622 625
623 NNTreeImpl::NNTreeImpl( 626 NNTreeImpl::NNTreeImpl(
624 - NNTreeDetails const& details, QPDF& qpdf, QPDFObjectHandle& oh, bool auto_repair) : 627 + NNTreeDetails const& details,
  628 + QPDF& qpdf,
  629 + QPDFObjectHandle& oh,
  630 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  631 + bool auto_repair) :
625 details(details), 632 details(details),
626 qpdf(qpdf), 633 qpdf(qpdf),
627 oh(oh), 634 oh(oh),
  635 + value_valid(value_validator),
628 auto_repair(auto_repair) 636 auto_repair(auto_repair)
629 { 637 {
630 } 638 }
@@ -740,7 +748,7 @@ NNTreeImpl::repair() @@ -740,7 +748,7 @@ NNTreeImpl::repair()
740 { 748 {
741 auto new_node = QPDFObjectHandle::newDictionary(); 749 auto new_node = QPDFObjectHandle::newDictionary();
742 new_node.replaceKey(details.itemsKey(), Array()); 750 new_node.replaceKey(details.itemsKey(), Array());
743 - NNTreeImpl repl(details, qpdf, new_node, false); 751 + NNTreeImpl repl(details, qpdf, new_node, value_valid, false);
744 for (auto const& [key, value]: *this) { 752 for (auto const& [key, value]: *this) {
745 if (key && value) { 753 if (key && value) {
746 repl.insert(key, value); 754 repl.insert(key, value);
@@ -774,10 +782,17 @@ NNTreeImpl::findInternal(QPDFObjectHandle const&amp; key, bool return_prev_if_not_fo @@ -774,10 +782,17 @@ NNTreeImpl::findInternal(QPDFObjectHandle const&amp; key, bool return_prev_if_not_fo
774 if (first_item == end()) { 782 if (first_item == end()) {
775 return end(); 783 return end();
776 } 784 }
777 - if (first_item.valid() && details.keyValid(first_item->first) &&  
778 - details.compareKeys(key, first_item->first) < 0) {  
779 - // Before the first key  
780 - return end(); 785 + if (first_item.valid()) {
  786 + if (!details.keyValid(first_item->first)) {
  787 + error(oh, "encountered invalid key in find");
  788 + }
  789 + if (!value_valid(first_item->second)) {
  790 + error(oh, "encountered invalid value in find");
  791 + }
  792 + if (details.compareKeys(key, first_item->first) < 0) {
  793 + // Before the first key
  794 + return end();
  795 + }
781 } 796 }
782 qpdf_assert_debug(!last_item.valid()); 797 qpdf_assert_debug(!last_item.valid());
783 798
@@ -797,6 +812,12 @@ NNTreeImpl::findInternal(QPDFObjectHandle const&amp; key, bool return_prev_if_not_fo @@ -797,6 +812,12 @@ NNTreeImpl::findInternal(QPDFObjectHandle const&amp; key, bool return_prev_if_not_fo
797 key, items, nitems / 2, return_prev_if_not_found, &NNTreeImpl::compareKeyItem); 812 key, items, nitems / 2, return_prev_if_not_found, &NNTreeImpl::compareKeyItem);
798 if (idx >= 0) { 813 if (idx >= 0) {
799 result.setItemNumber(node, 2 * idx); 814 result.setItemNumber(node, 2 * idx);
  815 + if (!result.impl.details.keyValid(result.ivalue.first)) {
  816 + error(node, "encountered invalid key in find");
  817 + }
  818 + if (!result.impl.value_valid(result.ivalue.second)) {
  819 + error(oh, "encountered invalid value in find");
  820 + }
800 } 821 }
801 return result; 822 return result;
802 } 823 }
@@ -830,6 +851,9 @@ NNTreeImpl::insertFirst(QPDFObjectHandle const&amp; key, QPDFObjectHandle const&amp; val @@ -830,6 +851,9 @@ NNTreeImpl::insertFirst(QPDFObjectHandle const&amp; key, QPDFObjectHandle const&amp; val
830 if (!(key && value)) { 851 if (!(key && value)) {
831 error(oh, "unable to insert null key or value"); 852 error(oh, "unable to insert null key or value");
832 } 853 }
  854 + if (!value_valid(value)) {
  855 + error(oh, "attempting to insert an invalid value");
  856 + }
833 items.insert(0, key); 857 items.insert(0, key);
834 items.insert(1, value); 858 items.insert(1, value);
835 iter.setItemNumber(iter.node, 0); 859 iter.setItemNumber(iter.node, 0);
@@ -867,3 +891,33 @@ NNTreeImpl::remove(QPDFObjectHandle const&amp; key, QPDFObjectHandle* value) @@ -867,3 +891,33 @@ NNTreeImpl::remove(QPDFObjectHandle const&amp; key, QPDFObjectHandle* value)
867 iter.remove(); 891 iter.remove();
868 return true; 892 return true;
869 } 893 }
  894 +
  895 +bool
  896 +NNTreeImpl::validate(bool a_repair)
  897 +{
  898 + bool first = true;
  899 + QPDFObjectHandle last_key;
  900 + try {
  901 + for (auto const& [key, value]: *this) {
  902 + if (!details.keyValid(key)) {
  903 + error(oh, "invalid key in validate");
  904 + }
  905 + if (!value_valid(value)) {
  906 + error(oh, "invalid value in validate");
  907 + }
  908 + if (first) {
  909 + first = false;
  910 + } else if (last_key && details.compareKeys(last_key, key) != -1) {
  911 + error(oh, "keys are not sorted in validate");
  912 + }
  913 + last_key = key;
  914 + }
  915 + } catch (QPDFExc& e) {
  916 + if (a_repair) {
  917 + warn(oh, std::string("attempting to repair after error: ") + e.what());
  918 + repair();
  919 + }
  920 + return false;
  921 + }
  922 + return true;
  923 +}
libqpdf/QPDFEmbeddedFileDocumentHelper.cc
  View file @ef14676
@@ -30,16 +30,30 @@ @@ -30,16 +30,30 @@
30 // >> 30 // >>
31 // >> 31 // >>
32 32
  33 +class QPDFEmbeddedFileDocumentHelper::Members
  34 +{
  35 + public:
  36 + Members() = default;
  37 + Members(Members const&) = delete;
  38 + ~Members() = default;
  39 +
  40 + std::unique_ptr<QPDFNameTreeObjectHelper> embedded_files;
  41 +};
  42 +
33 QPDFEmbeddedFileDocumentHelper::QPDFEmbeddedFileDocumentHelper(QPDF& qpdf) : 43 QPDFEmbeddedFileDocumentHelper::QPDFEmbeddedFileDocumentHelper(QPDF& qpdf) :
34 QPDFDocumentHelper(qpdf), 44 QPDFDocumentHelper(qpdf),
35 - m(new Members()) 45 + m(std::make_shared<Members>())
36 { 46 {
37 - auto root = qpdf.getRoot();  
38 - auto names = root.getKey("/Names"); 47 + auto names = qpdf.getRoot().getKey("/Names");
39 if (names.isDictionary()) { 48 if (names.isDictionary()) {
40 auto embedded_files = names.getKey("/EmbeddedFiles"); 49 auto embedded_files = names.getKey("/EmbeddedFiles");
41 if (embedded_files.isDictionary()) { 50 if (embedded_files.isDictionary()) {
42 - m->embedded_files = std::make_shared<QPDFNameTreeObjectHelper>(embedded_files, qpdf); 51 + m->embedded_files = std::make_unique<QPDFNameTreeObjectHelper>(
  52 + embedded_files,
  53 + qpdf,
  54 + [](QPDFObjectHandle const& o) -> bool { return o.isDictionary(); },
  55 + true);
  56 + m->embedded_files->validate();
43 } 57 }
44 } 58 }
45 } 59 }
@@ -65,7 +79,8 @@ QPDFEmbeddedFileDocumentHelper::initEmbeddedFiles() @@ -65,7 +79,8 @@ QPDFEmbeddedFileDocumentHelper::initEmbeddedFiles()
65 if (!embedded_files.isDictionary()) { 79 if (!embedded_files.isDictionary()) {
66 auto nth = QPDFNameTreeObjectHelper::newEmpty(qpdf); 80 auto nth = QPDFNameTreeObjectHelper::newEmpty(qpdf);
67 names.replaceKey("/EmbeddedFiles", nth.getObjectHandle()); 81 names.replaceKey("/EmbeddedFiles", nth.getObjectHandle());
68 - m->embedded_files = std::make_shared<QPDFNameTreeObjectHelper>(nth); 82 + m->embedded_files = std::make_unique<QPDFNameTreeObjectHelper>(
  83 + nth, qpdf, [](QPDFObjectHandle const& o) -> bool { return o.isDictionary(); }, true);
69 } 84 }
70 } 85 }
71 86
libqpdf/QPDFNameTreeObjectHelper.cc
  View file @ef14676
@@ -40,14 +40,29 @@ QPDFNameTreeObjectHelper::~QPDFNameTreeObjectHelper() // NOLINT (modernize-use-e @@ -40,14 +40,29 @@ QPDFNameTreeObjectHelper::~QPDFNameTreeObjectHelper() // NOLINT (modernize-use-e
40 // class, see github issue #745. 40 // class, see github issue #745.
41 } 41 }
42 42
43 -QPDFNameTreeObjectHelper::Members::Members(QPDFObjectHandle& oh, QPDF& q, bool auto_repair) :  
44 - impl(std::make_shared<NNTreeImpl>(name_tree_details, q, oh, auto_repair)) 43 +QPDFNameTreeObjectHelper::Members::Members(
  44 + QPDFObjectHandle& oh,
  45 + QPDF& q,
  46 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  47 + bool auto_repair) :
  48 + impl(std::make_shared<NNTreeImpl>(name_tree_details, q, oh, value_validator, auto_repair))
45 { 49 {
46 } 50 }
47 51
48 QPDFNameTreeObjectHelper::QPDFNameTreeObjectHelper(QPDFObjectHandle oh, QPDF& q, bool auto_repair) : 52 QPDFNameTreeObjectHelper::QPDFNameTreeObjectHelper(QPDFObjectHandle oh, QPDF& q, bool auto_repair) :
49 QPDFObjectHelper(oh), 53 QPDFObjectHelper(oh),
50 - m(new Members(oh, q, auto_repair)) 54 + m(new Members(
  55 + oh, q, [](QPDFObjectHandle const& o) -> bool { return static_cast<bool>(o); }, auto_repair))
  56 +{
  57 +}
  58 +
  59 +QPDFNameTreeObjectHelper::QPDFNameTreeObjectHelper(
  60 + QPDFObjectHandle oh,
  61 + QPDF& q,
  62 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  63 + bool auto_repair) :
  64 + QPDFObjectHelper(oh),
  65 + m(new Members(oh, q, value_validator, auto_repair))
51 { 66 {
52 } 67 }
53 68
@@ -200,3 +215,9 @@ QPDFNameTreeObjectHelper::getAsMap() const @@ -200,3 +215,9 @@ QPDFNameTreeObjectHelper::getAsMap() const
200 result.insert(begin(), end()); 215 result.insert(begin(), end());
201 return result; 216 return result;
202 } 217 }
  218 +
  219 +bool
  220 +QPDFNameTreeObjectHelper::validate(bool repair)
  221 +{
  222 + return m->impl->validate(repair);
  223 +}
libqpdf/QPDFNumberTreeObjectHelper.cc
  View file @ef14676
@@ -41,15 +41,30 @@ QPDFNumberTreeObjectHelper::~QPDFNumberTreeObjectHelper() // NOLINT (modernize-u @@ -41,15 +41,30 @@ QPDFNumberTreeObjectHelper::~QPDFNumberTreeObjectHelper() // NOLINT (modernize-u
41 // class, see github issue #745. 41 // class, see github issue #745.
42 } 42 }
43 43
44 -QPDFNumberTreeObjectHelper::Members::Members(QPDFObjectHandle& oh, QPDF& q, bool auto_repair) :  
45 - impl(std::make_shared<NNTreeImpl>(number_tree_details, q, oh, auto_repair)) 44 +QPDFNumberTreeObjectHelper::Members::Members(
  45 + QPDFObjectHandle& oh,
  46 + QPDF& q,
  47 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  48 + bool auto_repair) :
  49 + impl(std::make_shared<NNTreeImpl>(number_tree_details, q, oh, value_validator, auto_repair))
46 { 50 {
47 } 51 }
48 52
49 QPDFNumberTreeObjectHelper::QPDFNumberTreeObjectHelper( 53 QPDFNumberTreeObjectHelper::QPDFNumberTreeObjectHelper(
50 QPDFObjectHandle oh, QPDF& q, bool auto_repair) : 54 QPDFObjectHandle oh, QPDF& q, bool auto_repair) :
51 QPDFObjectHelper(oh), 55 QPDFObjectHelper(oh),
52 - m(new Members(oh, q, auto_repair)) 56 + m(new Members(
  57 + oh, q, [](QPDFObjectHandle const& o) -> bool { return static_cast<bool>(o); }, auto_repair))
  58 +{
  59 +}
  60 +
  61 +QPDFNumberTreeObjectHelper::QPDFNumberTreeObjectHelper(
  62 + QPDFObjectHandle oh,
  63 + QPDF& q,
  64 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  65 + bool auto_repair) :
  66 + QPDFObjectHelper(oh),
  67 + m(new Members(oh, q, value_validator, auto_repair))
53 { 68 {
54 } 69 }
55 70
@@ -236,3 +251,9 @@ QPDFNumberTreeObjectHelper::getAsMap() const @@ -236,3 +251,9 @@ QPDFNumberTreeObjectHelper::getAsMap() const
236 result.insert(begin(), end()); 251 result.insert(begin(), end());
237 return result; 252 return result;
238 } 253 }
  254 +
  255 +bool
  256 +QPDFNumberTreeObjectHelper::validate(bool repair)
  257 +{
  258 + return m->impl->validate(repair);
  259 +}
libqpdf/QPDFOutlineDocumentHelper.cc
  View file @ef14676
@@ -2,22 +2,42 @@ @@ -2,22 +2,42 @@
2 2
3 #include <qpdf/QTC.hh> 3 #include <qpdf/QTC.hh>
4 4
  5 +class QPDFOutlineDocumentHelper::Members
  6 +{
  7 + public:
  8 + Members() = default;
  9 + Members(Members const&) = delete;
  10 + ~Members() = default;
  11 +
  12 + std::vector<QPDFOutlineObjectHelper> outlines;
  13 + QPDFObjGen::set seen;
  14 + QPDFObjectHandle dest_dict;
  15 + std::unique_ptr<QPDFNameTreeObjectHelper> names_dest;
  16 + std::map<QPDFObjGen, std::vector<QPDFOutlineObjectHelper>> by_page;
  17 +};
  18 +
  19 +bool
  20 +QPDFOutlineDocumentHelper::Accessor::checkSeen(QPDFOutlineDocumentHelper& dh, QPDFObjGen og)
  21 +{
  22 + return !dh.m->seen.add(og);
  23 +}
  24 +
5 QPDFOutlineDocumentHelper::QPDFOutlineDocumentHelper(QPDF& qpdf) : 25 QPDFOutlineDocumentHelper::QPDFOutlineDocumentHelper(QPDF& qpdf) :
6 QPDFDocumentHelper(qpdf), 26 QPDFDocumentHelper(qpdf),
7 - m(new Members()) 27 + m(std::make_shared<Members>())
8 { 28 {
9 QPDFObjectHandle root = qpdf.getRoot(); 29 QPDFObjectHandle root = qpdf.getRoot();
10 if (!root.hasKey("/Outlines")) { 30 if (!root.hasKey("/Outlines")) {
11 return; 31 return;
12 } 32 }
13 - QPDFObjectHandle outlines = root.getKey("/Outlines"); 33 + auto outlines = root.getKey("/Outlines");
14 if (!(outlines.isDictionary() && outlines.hasKey("/First"))) { 34 if (!(outlines.isDictionary() && outlines.hasKey("/First"))) {
15 return; 35 return;
16 } 36 }
17 QPDFObjectHandle cur = outlines.getKey("/First"); 37 QPDFObjectHandle cur = outlines.getKey("/First");
18 QPDFObjGen::set seen; 38 QPDFObjGen::set seen;
19 while (!cur.isNull() && seen.add(cur)) { 39 while (!cur.isNull() && seen.add(cur)) {
20 - m->outlines.push_back(QPDFOutlineObjectHelper::Accessor::create(cur, *this, 1)); 40 + m->outlines.emplace_back(QPDFOutlineObjectHelper::Accessor::create(cur, *this, 1));
21 cur = cur.getKey("/Next"); 41 cur = cur.getKey("/Next");
22 } 42 }
23 } 43 }
@@ -55,11 +75,10 @@ QPDFOutlineDocumentHelper::getOutlinesForPage(QPDFObjGen og) @@ -55,11 +75,10 @@ QPDFOutlineDocumentHelper::getOutlinesForPage(QPDFObjGen og)
55 if (m->by_page.empty()) { 75 if (m->by_page.empty()) {
56 initializeByPage(); 76 initializeByPage();
57 } 77 }
58 - std::vector<QPDFOutlineObjectHelper> result;  
59 if (m->by_page.contains(og)) { 78 if (m->by_page.contains(og)) {
60 - result = m->by_page[og]; 79 + return m->by_page[og];
61 } 80 }
62 - return result; 81 + return {};
63 } 82 }
64 83
65 QPDFObjectHandle 84 QPDFObjectHandle
@@ -70,13 +89,19 @@ QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name) @@ -70,13 +89,19 @@ QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name)
70 if (!m->dest_dict) { 89 if (!m->dest_dict) {
71 m->dest_dict = qpdf.getRoot().getKey("/Dests"); 90 m->dest_dict = qpdf.getRoot().getKey("/Dests");
72 } 91 }
73 - QTC::TC("qpdf", "QPDFOutlineDocumentHelper name named dest");  
74 result = m->dest_dict.getKeyIfDict(name.getName()); 92 result = m->dest_dict.getKeyIfDict(name.getName());
75 } else if (name.isString()) { 93 } else if (name.isString()) {
76 if (!m->names_dest) { 94 if (!m->names_dest) {
77 auto dests = qpdf.getRoot().getKey("/Names").getKeyIfDict("/Dests"); 95 auto dests = qpdf.getRoot().getKey("/Names").getKeyIfDict("/Dests");
78 if (dests.isDictionary()) { 96 if (dests.isDictionary()) {
79 - m->names_dest = std::make_shared<QPDFNameTreeObjectHelper>(dests, qpdf); 97 + m->names_dest = std::make_unique<QPDFNameTreeObjectHelper>(
  98 + dests,
  99 + qpdf,
  100 + [](QPDFObjectHandle const& o) -> bool {
  101 + return o.isArray() || o.isDictionary();
  102 + },
  103 + true);
  104 + m->names_dest->validate();
80 } 105 }
81 } 106 }
82 if (m->names_dest) { 107 if (m->names_dest) {
@@ -89,7 +114,6 @@ QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name) @@ -89,7 +114,6 @@ QPDFOutlineDocumentHelper::resolveNamedDest(QPDFObjectHandle name)
89 return QPDFObjectHandle::newNull(); 114 return QPDFObjectHandle::newNull();
90 } 115 }
91 if (result.isDictionary()) { 116 if (result.isDictionary()) {
92 - QTC::TC("qpdf", "QPDFOutlineDocumentHelper named dest dictionary");  
93 return result.getKey("/D"); 117 return result.getKey("/D");
94 } 118 }
95 return result; 119 return result;
libqpdf/QPDFPageLabelDocumentHelper.cc
  View file @ef14676
@@ -2,37 +2,47 @@ @@ -2,37 +2,47 @@
2 2
3 #include <qpdf/QTC.hh> 3 #include <qpdf/QTC.hh>
4 4
  5 +class QPDFPageLabelDocumentHelper::Members
  6 +{
  7 + public:
  8 + Members() = default;
  9 + Members(Members const&) = delete;
  10 + ~Members() = default;
  11 +
  12 + std::unique_ptr<QPDFNumberTreeObjectHelper> labels;
  13 +};
  14 +
5 QPDFPageLabelDocumentHelper::QPDFPageLabelDocumentHelper(QPDF& qpdf) : 15 QPDFPageLabelDocumentHelper::QPDFPageLabelDocumentHelper(QPDF& qpdf) :
6 QPDFDocumentHelper(qpdf), 16 QPDFDocumentHelper(qpdf),
7 - m(new Members()) 17 + m(std::make_shared<Members>())
8 { 18 {
9 QPDFObjectHandle root = qpdf.getRoot(); 19 QPDFObjectHandle root = qpdf.getRoot();
10 if (root.hasKey("/PageLabels")) { 20 if (root.hasKey("/PageLabels")) {
11 - m->labels =  
12 - std::make_shared<QPDFNumberTreeObjectHelper>(root.getKey("/PageLabels"), this->qpdf); 21 + m->labels = std::make_unique<QPDFNumberTreeObjectHelper>(
  22 + root.getKey("/PageLabels"),
  23 + this->qpdf,
  24 + [](QPDFObjectHandle const& o) -> bool { return o.isDictionary(); },
  25 + true);
  26 + m->labels->validate();
13 } 27 }
14 } 28 }
15 29
16 bool 30 bool
17 QPDFPageLabelDocumentHelper::hasPageLabels() 31 QPDFPageLabelDocumentHelper::hasPageLabels()
18 { 32 {
19 - return nullptr != m->labels; 33 + return m->labels != nullptr;
20 } 34 }
21 35
22 QPDFObjectHandle 36 QPDFObjectHandle
23 QPDFPageLabelDocumentHelper::getLabelForPage(long long page_idx) 37 QPDFPageLabelDocumentHelper::getLabelForPage(long long page_idx)
24 { 38 {
25 - QPDFObjectHandle result(QPDFObjectHandle::newNull());  
26 if (!hasPageLabels()) { 39 if (!hasPageLabels()) {
27 - return result; 40 + return QPDFObjectHandle::newNull();
28 } 41 }
29 QPDFNumberTreeObjectHelper::numtree_number offset = 0; 42 QPDFNumberTreeObjectHelper::numtree_number offset = 0;
30 QPDFObjectHandle label; 43 QPDFObjectHandle label;
31 if (!m->labels->findObjectAtOrBelow(page_idx, label, offset)) { 44 if (!m->labels->findObjectAtOrBelow(page_idx, label, offset)) {
32 - return result;  
33 - }  
34 - if (!label.isDictionary()) {  
35 - return result; 45 + return QPDFObjectHandle::newNull();
36 } 46 }
37 QPDFObjectHandle S = label.getKey("/S"); // type (D, R, r, A, a) 47 QPDFObjectHandle S = label.getKey("/S"); // type (D, R, r, A, a)
38 QPDFObjectHandle P = label.getKey("/P"); // prefix 48 QPDFObjectHandle P = label.getKey("/P"); // prefix
@@ -43,7 +53,7 @@ QPDFPageLabelDocumentHelper::getLabelForPage(long long page_idx) @@ -43,7 +53,7 @@ QPDFPageLabelDocumentHelper::getLabelForPage(long long page_idx)
43 } 53 }
44 QIntC::range_check(start, offset); 54 QIntC::range_check(start, offset);
45 start += offset; 55 start += offset;
46 - result = QPDFObjectHandle::newDictionary(); 56 + auto result = QPDFObjectHandle::newDictionary();
47 result.replaceKey("/S", S); 57 result.replaceKey("/S", S);
48 result.replaceKey("/P", P); 58 result.replaceKey("/P", P);
49 result.replaceKey("/St", QPDFObjectHandle::newInteger(start)); 59 result.replaceKey("/St", QPDFObjectHandle::newInteger(start));
@@ -81,21 +91,20 @@ QPDFPageLabelDocumentHelper::getLabelsForPageRange( @@ -81,21 +91,20 @@ QPDFPageLabelDocumentHelper::getLabelsForPageRange(
81 label.getKey("/St").getIntValue() - last.getKey("/St").getIntValue(); 91 label.getKey("/St").getIntValue() - last.getKey("/St").getIntValue();
82 long long int idx_delta = new_start_idx - last_idx.getIntValue(); 92 long long int idx_delta = new_start_idx - last_idx.getIntValue();
83 if (st_delta == idx_delta) { 93 if (st_delta == idx_delta) {
84 - QTC::TC("qpdf", "QPDFPageLabelDocumentHelper skip first");  
85 skip_first = true; 94 skip_first = true;
86 } 95 }
87 } 96 }
88 } 97 }
89 if (!skip_first) { 98 if (!skip_first) {
90 - new_labels.push_back(QPDFObjectHandle::newInteger(new_start_idx));  
91 - new_labels.push_back(label); 99 + new_labels.emplace_back(QPDFObjectHandle::newInteger(new_start_idx));
  100 + new_labels.emplace_back(label);
92 } 101 }
93 102
94 long long int idx_offset = new_start_idx - start_idx; 103 long long int idx_offset = new_start_idx - start_idx;
95 for (long long i = start_idx + 1; i <= end_idx; ++i) { 104 for (long long i = start_idx + 1; i <= end_idx; ++i) {
96 if (m->labels->hasIndex(i) && (label = getLabelForPage(i)).isDictionary()) { 105 if (m->labels->hasIndex(i) && (label = getLabelForPage(i)).isDictionary()) {
97 - new_labels.push_back(QPDFObjectHandle::newInteger(i + idx_offset));  
98 - new_labels.push_back(label); 106 + new_labels.emplace_back(QPDFObjectHandle::newInteger(i + idx_offset));
  107 + new_labels.emplace_back(label);
99 } 108 }
100 } 109 }
101 } 110 }
libqpdf/qpdf/NNTree.hh
  View file @ef14676
@@ -95,7 +95,12 @@ class NNTreeImpl @@ -95,7 +95,12 @@ class NNTreeImpl
95 public: 95 public:
96 typedef NNTreeIterator iterator; 96 typedef NNTreeIterator iterator;
97 97
98 - NNTreeImpl(NNTreeDetails const&, QPDF&, QPDFObjectHandle&, bool auto_repair = true); 98 + NNTreeImpl(
  99 + NNTreeDetails const&,
  100 + QPDF&,
  101 + QPDFObjectHandle&,
  102 + std::function<bool(QPDFObjectHandle const&)> value_validator,
  103 + bool auto_repair = true);
99 iterator begin(); 104 iterator begin();
100 iterator end(); 105 iterator end();
101 iterator last(); 106 iterator last();
@@ -104,6 +109,8 @@ class NNTreeImpl @@ -104,6 +109,8 @@ class NNTreeImpl
104 iterator insert(QPDFObjectHandle const& key, QPDFObjectHandle const& value); 109 iterator insert(QPDFObjectHandle const& key, QPDFObjectHandle const& value);
105 bool remove(QPDFObjectHandle const& key, QPDFObjectHandle* value = nullptr); 110 bool remove(QPDFObjectHandle const& key, QPDFObjectHandle* value = nullptr);
106 111
  112 + bool validate(bool repair = true);
  113 +
107 // Change the split threshold for easier testing. There's no real reason to expose this to 114 // Change the split threshold for easier testing. There's no real reason to expose this to
108 // downstream tree helpers, but it has to be public so we can call it from the test suite. 115 // downstream tree helpers, but it has to be public so we can call it from the test suite.
109 void setSplitThreshold(int split_threshold); 116 void setSplitThreshold(int split_threshold);
@@ -127,6 +134,7 @@ class NNTreeImpl @@ -127,6 +134,7 @@ class NNTreeImpl
127 QPDF& qpdf; 134 QPDF& qpdf;
128 int split_threshold{32}; 135 int split_threshold{32};
129 QPDFObjectHandle oh; 136 QPDFObjectHandle oh;
  137 + const std::function<bool(QPDFObjectHandle const&)> value_valid;
130 bool auto_repair{true}; 138 bool auto_repair{true};
131 size_t error_count{0}; 139 size_t error_count{0};
132 }; 140 };
manual/release-notes.rst
  View file @ef14676
@@ -23,6 +23,16 @@ more detail. @@ -23,6 +23,16 @@ more detail.
23 not work on some older Linux distributions. If you need support 23 not work on some older Linux distributions. If you need support
24 for an older distribution, please use version 12.2.0 or below. 24 for an older distribution, please use version 12.2.0 or below.
25 25
  26 + - Library Enhancements
  27 +
  28 + - Add ``QPDFNameTreeObjectHelper`` and ``QPDFNumberTreeObjectHelper``
  29 + constructor overloads that allow a function to ne passed to
  30 + validate the values in the tree.
  31 +
  32 + - Add new ``QPDFNameTreeObjectHelper`` and ``QPDFNumberTreeObjectHelper``
  33 + ``validate`` method to validate and optionally repair the name/number
  34 + tree.
  35 +
26 - CLI Enhancements 36 - CLI Enhancements
27 37
28 - Disallow option :qpdf:ref:`--deterministic-id` to be used together 38 - Disallow option :qpdf:ref:`--deterministic-id` to be used together
qpdf/qpdf.testcov
  View file @ef14676
@@ -338,13 +338,10 @@ QPDFAcroFormDocumentHelper annotation found 1 @@ -338,13 +338,10 @@ QPDFAcroFormDocumentHelper annotation found 1
338 QPDFJob keep files open n 0 338 QPDFJob keep files open n 0
339 QPDFJob keep files open y 0 339 QPDFJob keep files open y 0
340 QPDFJob automatically set keep files open 1 340 QPDFJob automatically set keep files open 1
341 -QPDFPageLabelDocumentHelper skip first 0  
342 QPDFOutlineObjectHelper direct dest 0 341 QPDFOutlineObjectHelper direct dest 0
343 QPDFOutlineObjectHelper action dest 0 342 QPDFOutlineObjectHelper action dest 0
344 QPDFOutlineObjectHelper named dest 0 343 QPDFOutlineObjectHelper named dest 0
345 -QPDFOutlineDocumentHelper name named dest 0  
346 QPDFOutlineDocumentHelper string named dest 0 344 QPDFOutlineDocumentHelper string named dest 0
347 -QPDFOutlineDocumentHelper named dest dictionary 0  
348 QPDFOutlineObjectHelper loop 0 345 QPDFOutlineObjectHelper loop 0
349 QPDFObjectHandle merge top type mismatch 0 346 QPDFObjectHandle merge top type mismatch 0
350 QPDFObjectHandle merge shallow copy 0 347 QPDFObjectHandle merge shallow copy 0
qpdf/qtest/page-labels.test
  View file @ef14676
@@ -14,7 +14,7 @@ cleanup(); @@ -14,7 +14,7 @@ cleanup();
14 14
15 my $td = new TestDriver('page-labels'); 15 my $td = new TestDriver('page-labels');
16 16
17 -my $n_tests = 3; 17 +my $n_tests = 4;
18 18
19 $td->runtest("complex page labels", 19 $td->runtest("complex page labels",
20 {$td->COMMAND => "test_driver 47 page-labels-num-tree.pdf"}, 20 {$td->COMMAND => "test_driver 47 page-labels-num-tree.pdf"},
@@ -29,6 +29,15 @@ $td-&gt;runtest(&quot;no page labels&quot;, @@ -29,6 +29,15 @@ $td-&gt;runtest(&quot;no page labels&quot;,
29 {$td->FILE => "no-page-labels.out", $td->EXIT_STATUS => 0}, 29 {$td->FILE => "no-page-labels.out", $td->EXIT_STATUS => 0},
30 $td->NORMALIZE_NEWLINES); 30 $td->NORMALIZE_NEWLINES);
31 31
  32 +# page-labels-num-tree-damaged.pdf has the following errors:
  33 +# - entry for page 29 preceedes entry for page 20
  34 +# - entry for page 3 follows entry for page 6
  35 +# - entry for page 12 is an integer rather than a dictionary
  36 +$td->runtest("damaged page labels",
  37 + {$td->COMMAND => "test_driver 47 page-labels-num-tree-damaged.pdf"},
  38 + {$td->FILE => "page-labels-num-tree-damaged.out", $td->EXIT_STATUS => 0},
  39 + $td->NORMALIZE_NEWLINES);
  40 +
32 # --set-page-labels 41 # --set-page-labels
33 my @errors = ( 42 my @errors = (
34 ["quack", ".*page label spec must be.*"], 43 ["quack", ".*page label spec must be.*"],
qpdf/qtest/qpdf/page-labels-num-tree-damaged.out 0 → 100644
  View file @ef14676
  1 +WARNING: page-labels-num-tree-damaged.pdf (Name/Number tree node (object 2)): attempting to repair after error: page-labels-num-tree-damaged.pdf (Name/Number tree node (object 2)): keys are not sorted in validate
  2 +WARNING: page-labels-num-tree-damaged.pdf (Name/Number tree node (object 37)): item 1 is invalid
  3 +1 << /S /r /St 1 >>
  4 +3 << /P (blank) /St 1 >>
  5 +4 << /P (X-) /S /A /St 17 >>
  6 +6 << /P () /St 1 >>
  7 +7 << /S /R /St 3 >>
  8 +10 << /S /D /St 1 >>
  9 +13 << /S /a /St 3 >>
  10 +16 << /P (q.) /S /D /St 6 >>
  11 +20 << /P (www) /St 1 >>
  12 +21 << /S /D /St 12 >>
  13 +23 << /S /D /St 16059 >>
  14 +24 << /S /R /St 50 >>
  15 +30 << /S /r /St 54 >>
  16 +test 47 done
qpdf/qtest/qpdf/page-labels-num-tree-damaged.pdf 0 → 100644
  View file @ef14676
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  2 +%¿÷¢þ
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