Bug#924001: evince cannot decrypt PDFs using 256-bit keys

[Josh Triplett]

Package: evince
Version: 3.31.91-1
Severity: normal

Steps to reproduce:

- Install qpdf
- Have an unencrypted PDF "test.pdf"
- qpdf --encrypt 123456789 123456789 256 -- test.pdf test-256.pdf
- Try to open test-256.pdf with evince. Enter the password "123456789".
  Notice that evince fails and prompts for the password again.
- qpdf --encrypt 123456789 123456789 128 -- test.pdf test-128.pdf
- Try to open test-128.pdf with evince. Enter the password "123456789".
  Notice that evince succeeds.

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages evince depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.30.1-2
ii  evince-common                                3.31.91-1
ii  gsettings-desktop-schemas                    3.28.1-1
ii  libatk1.0-0                                  2.30.0-2
ii  libc6                                        2.28-8
ii  libcairo-gobject2                            1.16.0-3
ii  libcairo2                                    1.16.0-3
ii  libevdocument3-4                             3.31.91-1
ii  libevview3-3                                 3.31.91-1
ii  libgdk-pixbuf2.0-0                           2.38.1+dfsg-1
ii  libglib2.0-0                                 2.58.3-1
ii  libgnome-desktop-3-17                        3.30.2.1-1
ii  libgtk-3-0                                   3.24.5-1
ii  libnautilus-extension1a                      3.30.5-1
ii  libpango-1.0-0                               1.42.4-6
ii  libpangocairo-1.0-0                          1.42.4-6
ii  libsecret-1-0                                0.18.7-1
ii  shared-mime-info                             1.10-1

Versions of packages evince recommends:
ii  dbus-user-session [default-dbus-session-bus]  1.12.12-1
ii  dbus-x11 [dbus-session-bus]                   1.12.12-1

Versions of packages evince suggests:
ii  gvfs             1.38.1-3
ii  nautilus-sendto  3.8.6-3
ii  poppler-data     0.4.9-2
pn  unrar            <none>

-- no debconf information