For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/openSUSE_Tumbleweed/home:mnhauke:security.repo
zypper refresh
zypper install john
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/openSUSE_Leap_42.3/home:mnhauke:security.repo
zypper refresh
zypper install john
For openSUSE Leap 42.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/openSUSE_Leap_42.2/home:mnhauke:security.repo
zypper refresh
zypper install john
For openSUSE Leap 42.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/openSUSE_Leap_42.1/home:mnhauke:security.repo
zypper refresh
zypper install john
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/15.6/home:mnhauke:security.repo
zypper refresh
zypper install john
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/15.5/home:mnhauke:security.repo
zypper refresh
zypper install john
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/15.4/home:mnhauke:security.repo
zypper refresh
zypper install john
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke:security/15.3/home:mnhauke:security.repo
zypper refresh
zypper install john