[pkg-opensc-maint] Bug#961123: opensc: support for CardOS 5.3 broken in 0.20.0

[Silvano Cirujano Cuesta]

Package: opensc
Version: 0.20.0-4
Severity: important
Tags: upstream patch

OpenSC version 0.20.0 broke the support for CardOS 5.3 smartcards. It
potentially also breaks CardOS 5.0 and other 5.x smartcards (if any
exist).

People with a CardOS 5.3 smartcard can reproduce the issue with the
command `pkcs11-tool --login --test`, which reports a couple of failures
in the signature verification.

There's a bugfix upstream for this issue: https://github.com/OpenSC/OpenSC/pull/1987

Just for reference, here is the equivalent Fedora bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1830528

-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (900, 'testing'), (50, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.6.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages opensc depends on:
ii  libc6          2.30-8
ii  libreadline8   8.0-4
ii  libssl1.1      1.1.1g-1
ii  opensc-pkcs11  0.20.0-4
ii  zlib1g         1:1.2.11.dfsg-2

Versions of packages opensc recommends:
ii  pcscd  1.8.26-3

opensc suggests no packages.

-- Configuration Files:
/etc/opensc/opensc.conf changed [not included]

-- no debconf information