For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:tls/openSUSE_Tumbleweed/security:tls.repo
zypper refresh
zypper install libica
For openSUSE Factory zSystems run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:tls/openSUSE_Factory_zSystems/security:tls.repo
zypper refresh
zypper install libica
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:tls/16.0/security:tls.repo
zypper refresh
zypper install libica
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:tls/15.6/security:tls.repo
zypper refresh
zypper install libica