unicode-password.test
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#!/usr/bin/env perl
require 5.008;
use warnings;
use strict;
unshift(@INC, '.');
require qpdf_test_helpers;
chdir("qpdf") or die "chdir testdir failed: $!\n";
require TestDriver;
cleanup();
my $td = new TestDriver('unicode-password');
my $n_tests = 0;
# $n_tests incremented below
# Files with each of these passwords when properly encoded have been
# tested manually with multiple PDF viewers. Adobe Reader, chrome,
# xpdf, and gv can open all of them except R3 with "single-byte",
# which can be opened by xpdf and gv but not the others. As of
# 2019-01-19, okular and atril (evince) are not able to open R=6 files
# with Unicode passwords as generated by qpdf but can open the R=3
# files.
# [bits, password-or-password-name, write-encoding, actual-encoding, xargs,
# [[read-encoding, strict?, fail?, tried-others, xargs]]]
my @unicode_pw_cases = (
[128, 'simple', 'pdf-doc', 'pdf-doc', '',
[['utf8', 0, 0, 1, ''],
['utf8', 1, 1, 0, ''],
['pdf-doc', 1, 0, 0, ''],
]],
[128, 'simple', 'utf8', 'utf8', '--password-mode=bytes',
[['pdf-doc', 0, 0, 1, ''],
['pdf-doc', 1, 1, 0, ''],
['utf8', 1, 0, 0, ''],
]],
[128, 'simple', 'utf8', 'pdf-doc', '--password-mode=unicode',
[['pdf-doc', 1, 0, 0, ''],
]],
[128, 'simple', 'utf8', 'pdf-doc', '--password-mode=auto',
[['pdf-doc', 1, 0, 0, ''],
]],
[128, 'single-byte', 'utf8', 'pdf-doc', '',
[['pdf-doc', 1, 0, 0, ''],
['win-ansi', 0, 0, 1, ''],
]],
[128, 'single-byte', 'utf8', 'pdf-doc', '--password-mode=unicode',
[['pdf-doc', 1, 0, 0, ''],
['win-ansi', 0, 0, 1, ''],
]],
[128, 'single-byte', 'win-ansi', '', '--password-mode=unicode',
"supplied password is not valid UTF-8\n",
],
[128, 'single-byte', 'win-ansi', 'win-ansi', '',
[['win-ansi', 1, 0, 0, ''],
]],
[128, 'single-byte', 'pdf-doc', 'pdf-doc', '',
[['pdf-doc', 1, 0, 0, ''],
['win-ansi', 0, 0, 1, ''],
['pdf-doc-hex', 1, 0, 0, '--password-mode=hex-bytes'],
]],
[128, 'complex', 'utf8', '', '--password-mode=unicode',
"supplied password cannot be encoded for 40-bit or" .
" 128-bit encryption formats\n"
],
[128, 'complex', 'utf8', 'utf8', '--password-mode=bytes',
[['utf8', 1, 0, 0, ''],
]],
[256, 'single-byte', 'win-ansi', '', '--password-mode=unicode',
"supplied password is not valid UTF-8\n",
],
[256, 'single-byte', 'win-ansi', '', '--password-mode=auto',
"supplied password is not a valid Unicode password, which is" .
" required for 256-bit encryption; to really use this password," .
" rerun with the --password-mode=bytes option\n",
],
[256, 'single-byte', 'win-ansi', 'win-ansi', '--password-mode=bytes',
[['utf8', 0, 0, 1, ''],
['utf8', 1, 1, 0, ''],
['win-ansi', 1, 0, 0, ''],
['win-ansi', 0, 0, 0, ''],
['pdf-doc', 0, 0, 1, ''],
['pdf-doc-hex', 0, 0, 1, '--password-mode=hex-bytes'],
]],
[256, 'complex', 'utf8', 'utf8', '',
[['utf8', 1, 0, 0, ''],
['utf8-hex', 1, 0, 0, '--password-mode=hex-bytes'],
]],
[256, 'complex', 'utf8-hex', 'utf8', '--password-mode=hex-bytes',
[['utf8', 1, 0, 0, ''],
['utf8-hex', 1, 0, 0, '--password-mode=hex-bytes'],
]],
[256, 'complex', 'utf8', 'utf8', '--password-mode=unicode',
[['utf8', 1, 0, 0, ''],
['password-arg-simple-utf8', 0, 1, 1, ''],
]],
);
for my $d (@unicode_pw_cases)
{
my $decode_cases = $d->[5];
$n_tests += 1;
if (ref($decode_cases) eq 'ARRAY')
{
$n_tests += scalar(@$decode_cases);
}
}
foreach my $d (@unicode_pw_cases)
{
my ($bits, $pw, $w_encoding, $a_encoding, $xargs, $decode_cases) = @$d;
my $w_pfile = "password-bare-$pw-$w_encoding";
my $upass;
if (-f $w_pfile)
{
$upass = '@' . $w_pfile;
}
else
{
$upass = "$pw";
}
my $outbase = "unicode-pw-$bits-$pw-$w_encoding-$xargs";
my $exp = '';
if (ref($decode_cases) ne 'ARRAY')
{
$exp = "qpdf: $decode_cases";
$decode_cases = [];
}
$td->runtest("encode $bits, $pw, $w_encoding",
{$td->COMMAND =>
"qpdf $xargs --static-id --static-aes-iv" .
" --allow-weak-crypto" .
" --encrypt $upass o $bits -- minimal.pdf a.pdf"},
{$td->STRING => $exp, $td->EXIT_STATUS => ($exp ? 2 : 0)},
$td->NORMALIZE_NEWLINES);
foreach my $d2 (@$decode_cases)
{
my ($r_encoding, $strict, $xfail, $tried_others, $r_xargs) = @$d2;
my $r_pfile = "password-arg-$pw-$r_encoding";
if (! -f $r_pfile)
{
$r_pfile = $r_encoding;
}
my $r_output = "";
$r_output .= "trying other\n" if $tried_others;
my $arg = "--show-encryption";
if ($xfail)
{
$r_output .= "qpdf: a.pdf: invalid password\n";
$arg = "--check";
}
else
{
$r_output .= "R = " . ($bits == 128 ? '3' : '6') . "\n";
open(F, "<password-bare-$pw-$a_encoding") or die;
chomp (my $apw = <F>);
close(F);
$r_output .= "User password = $apw\n";
}
$r_xargs .= $strict ? ' --suppress-password-recovery' : '';
$td->runtest("decrypt $pw, $r_encoding, strict=$strict",
{$td->COMMAND =>
"qpdf $arg --verbose" .
" $r_xargs a.pdf \@$r_pfile",
$td->FILTER => "perl show-unicode-encryption.pl"},
{$td->STRING => "$r_output",
$td->EXIT_STATUS => ($xfail ? 2 : 0)},
$td->NORMALIZE_NEWLINES);
}
}
$n_tests += 5;
$td->runtest("bytes fallback warning",
{$td->COMMAND =>
"qpdf --allow-weak-crypto" .
" --encrypt \@password-bare-complex-utf8 o 128 --" .
" minimal.pdf a.pdf"},
{$td->FILE => "bytes-fallback.out", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
{ # local scope
my $r_output = "";
$r_output .= "R = 3\n";
open(F, "<password-bare-complex-utf8") or die;
chomp (my $apw = <F>);
close(F);
$r_output .= "User password = $apw\n";
$td->runtest("decrypt bytes fallback",
{$td->COMMAND =>
"qpdf --show-encryption --verbose" .
" a.pdf \@password-arg-complex-utf8" .
" --password-mode=bytes",
$td->FILTER => "perl show-unicode-encryption.pl"},
{$td->STRING => "$r_output", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
}
# Exercise passing Unicode passwords via the command line. This tests
# wmain for Windows and assumes a UTF-8 locale for other platforms.
$td->runtest("Unicode at CLI",
{$td->COMMAND =>
"qpdf --encrypt π ʬ 256 --" .
" minimal.pdf a.pdf"},
{$td->STRING => "", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
$td->runtest("Decrypt using user password",
{$td->COMMAND => "qpdf --show-encryption a.pdf --password=π"},
{$td->FILE => "unicode-up.out", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
$td->runtest("Decrypt using owner password",
{$td->COMMAND => "qpdf --show-encryption a.pdf --password=ʬ"},
{$td->FILE => "unicode-op.out", $td->EXIT_STATUS => 0},
$td->NORMALIZE_NEWLINES);
cleanup();
$td->report($n_tests);