Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Tumbleweed/home:ykoba.repo
zypper refresh
zypper install libb64
Para openSUSE Leap 42.3 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Leap_42.3/home:ykoba.repo
zypper refresh
zypper install libb64
Para openSUSE Leap 15.1 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/openSUSE_Leap_15.1/home:ykoba.repo
zypper refresh
zypper install libb64
Para 15.5 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.5/home:ykoba.repo
zypper refresh
zypper install libb64
Para 15.4 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:ykoba/15.4/home:ykoba.repo
zypper refresh
zypper install libb64