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Code Issues Releases Wiki Activity

Allow comparison of password-protected files

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This commit is contained in:
Jay Berkenbilt 2023-12-20 08:17:55 -05:00
parent 321f9e79db
commit 38042fa273
2 changed files with 19 additions and 8 deletions
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18
compare-for-test/qpdf-test-compare.cc
View File

@ -129,12 +129,12 @@ cleanTrailer(QPDFObjectHandle& trailer)
}
std::string
compare(char const* actual_filename, char const* expected_filename)
compare(char const* actual_filename, char const* expected_filename, char const* password)
{
QPDF actual;
actual.processFile(actual_filename);
actual.processFile(actual_filename, password);
QPDF expected;
expected.processFile(expected_filename);
expected.processFile(expected_filename, password);
// The motivation behind this program is to compare files in a way that allows for
// differences in the exact bytes of zlib compression. If all zlib implementations produced
// exactly the same output, we would just be able to use straight comparison, but since they
@ -191,16 +191,20 @@ main(int argc, char* argv[])
exit(0);
}
if (argc != 3) {
if (argc < 3 || argc > 4) {
usage();
}
bool show_why = QUtil::get_env("QPDF_COMPARE_WHY");
try {
char const* to_output;
auto actual = argv[1];
auto expected = argv[2];
auto difference = compare(actual, expected);
char const* actual = argv[1];
char const* expected = argv[2];
char const* password{nullptr};
if (argc == 4) {
password = argv[3];
}
auto difference = compare(actual, expected, password);
if (difference.empty()) {
// The files are identical; write the expected file. This way, tests can be written
// that compare the output of this program to the expected file.

9
compare-for-test/qtest/compare.test
View File

@ -73,7 +73,7 @@ foreach my $f (@diff)
}
# Repeat for encrypted files.
$n_tests += 3;
$n_tests += 5;
$td->runtest("byte-wise compare encrypted files",
{$td->COMMAND => "cmp enc1.pdf enc2.pdf"},
{$td->REGEXP => ".*", $td->EXIT_STATUS => "!0"});
@ -84,6 +84,13 @@ $td->runtest("compare encrypted files (different)",
{$td->COMMAND => "env QPDF_COMPARE_WHY=1 qpdf-test-compare enc1.pdf diff-data-enc.pdf"},
{$td->STRING => "4,0: stream data differs\n", $td->EXIT_STATUS => 2},
$td->NORMALIZE_NEWLINES);
$td->runtest("with password (same)",
{$td->COMMAND => "env QPDF_COMPARE_WHY=1 qpdf-test-compare enc1.pdf enc2.pdf o"},
{$td->FILE => "enc2.pdf", $td->EXIT_STATUS => 0});
$td->runtest("with password (different)",
{$td->COMMAND => "env QPDF_COMPARE_WHY=1 qpdf-test-compare enc1.pdf diff-data-enc.pdf o"},
{$td->STRING => "4,0: stream data differs\n", $td->EXIT_STATUS => 2},
$td->NORMALIZE_NEWLINES);
# Object streams
$n_tests += 1;