OpenSystemsDevelopment / qpdf

Commit db95960ac16076030a840a1ae050eea35aa21ea2

Authored by Jay Berkenbilt
1 parent b5012512

Bug fix: preserve AES when copying encryption parameters

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Showing 3 changed files with 33 additions and 2 deletions
ChangeLog
  View file @db95960
  1 +2012-07-15 Jay Berkenbilt <ejb@ql.org>
  2 +
  3 + * libqpdf/QPDFWriter.cc (copyEncryptionParameters): Bug fix: qpdf
  4 + was not preserving whether or not AES encryption was being used
  5 + when copying encryption parameters.
  6 +
1 7 2012-07-14 Jay Berkenbilt <ejb@ql.org>
2 8  
3 9 * QPDFWriter: add public copyEncryptionParameters to allow copying
... ...
libqpdf/QPDFWriter.cc
  View file @db95960
... ... @@ -409,10 +409,34 @@ QPDFWriter::copyEncryptionParameters(QPDF&amp; qpdf)
409 409 this->encrypt_metadata =
410 410 encrypt.getKey("/EncryptMetadata").getBoolValue();
411 411 }
  412 + if (V >= 4)
  413 + {
  414 + if (encrypt.hasKey("/CF") &&
  415 + encrypt.getKey("/CF").isDictionary() &&
  416 + encrypt.hasKey("/StmF") &&
  417 + encrypt.getKey("/StmF").isName())
  418 + {
  419 + // Determine whether to use AES from StmF. QPDFWriter
  420 + // can't write files with different StrF and StmF.
  421 + QPDFObjectHandle CF = encrypt.getKey("/CF");
  422 + QPDFObjectHandle StmF = encrypt.getKey("/StmF");
  423 + if (CF.hasKey(StmF.getName()) &&
  424 + CF.getKey(StmF.getName()).isDictionary())
  425 + {
  426 + QPDFObjectHandle StmF_data = CF.getKey(StmF.getName());
  427 + if (StmF_data.hasKey("/CFM") &&
  428 + StmF_data.getKey("/CFM").isName() &&
  429 + StmF_data.getKey("/CFM").getName() == "/AESV2")
  430 + {
  431 + this->encrypt_use_aes = true;
  432 + }
  433 + }
  434 + }
  435 + }
412 436 QTC::TC("qpdf", "QPDFWriter copy encrypt metadata",
413 437 this->encrypt_metadata ? 0 : 1);
414   - this->id1 =
415   - trailer.getKey("/ID").getArrayItem(0).getStringValue();
  438 + QTC::TC("qpdf", "QPDFWriter copy use_aes",
  439 + this->encrypt_use_aes ? 0 : 1);
416 440 setEncryptionParametersInternal(
417 441 V,
418 442 encrypt.getKey("/R").getIntValue(),
... ...
qpdf/qpdf.testcov
  View file @db95960
... ... @@ -234,3 +234,4 @@ QPDF replace foreign indirect with null 0
234 234 QPDF not copying pages object 0
235 235 QPDF insert foreign page 0
236 236 QPDFWriter foreign object 0
  237 +QPDFWriter copy use_aes 1
... ...