Package: nacl

"nacl" package binaries on CentOS:

/usr/bin/curvecpclient /usr/bin/curvecpmakekey /usr/bin/curvecpmessage /usr/bin/curvecpprintkey /usr/bin/curvecpserver /usr/bin/nacl-sha256 /usr/bin/nacl-sha512

You may install this package on CentOS with yum install nacl