prngd installation and customization

AIX 3.x/4.x

Compilation

1. Unpack the sources e.g.:

   gunzip -c prngd-0.9.29.tar.gz | tar xvf -
   cd prngd-0.9.29
   

2. Modify the Makefile according to the OS version:

   CC = cc
   CFLAGS = -O -DAIX32 -qmaxmem=-1   
   CFLAGS = -O -DAIX41 -qmaxmem=-1   
   CFLAGS = -O -DAIX42 -qmaxmem=-1   
   CFLAGS = -O -DAIX43 -qmaxmem=-1   
   

   then

   make clean
   make
   

3. Install into some convenient directory, e.g.:

   mkdir -p /opt/prngd-0.9.29/bin
   cp prngd /opt/prngd-0.9.29/bin
   mkdir -p /opt/prngd-0.9.29/etc
   cp contrib/AIX-4.3/prngd.conf.aix43 /opt/prngd-0.9.29/etc/prngd.conf # entropy gathering commands
   

4. For easier version control it is convenient to place links ("stow") like

   ln -s /opt/prngd-0.9.29/bin/prngd      /opt/bin/prngd
   ln -s /opt/prngd-0.9.29/etc/prngd.conf /opt/etc/prngd.conf
   ln -s /opt/prngd-0.9.29/etc/prngd-seed /opt/etc/prngd-seed
   

   and refer to these links only.

Configuration

1. create a subsystem:

   cat /var/adm/syslog /var/adm/syslog.0 /var/adm/syslog.1 > /opt/etc/prngd-seed  # random seed
   mkssys -s prngd -p /opt/bin/prngd -a '-f -c /opt/etc/prngd.conf -s /opt/etc/prngd-seed /dev/egd-pool' -u 0 -S -n 15 -f 9 -R -G local
   

2. Add to /etc/rc.local:

   startsrc -s prngd      # start the subsystem on boot
   

HP-UX

9.x

10.x/11.x

Ultrix 4.5

Compilation

1. Unpack the sources, e.g.:

   gunzip -c prngd-0.9.29.tar.gz | tar xvf -
   cd prngd-0.9.29
   

2. Modify the Makefile according to the OS version:

   CC = cc
   CFLAGS = -O -DULTRIX   
   

   then make
3. Install into some convenient directory, e.g.:

   mkdir -p /opt/prngd-0.9.29/bin
   cp prngd /opt/prngd-0.9.29/bin
   mkdir -p /opt/prngd-0.9.29/etc
   cp contrib/Ultrix-4.5/prngd.conf.ultrix /opt/prngd-0.9.29/etc/prngd.conf # entropy gathering commands
   

4. For easier version control it is convenient to place links ("stow") like

   ln -s /opt/prngd-0.9.29/bin/prngd      /opt/bin/prngd
   ln -s /opt/prngd-0.9.29/etc/prngd.conf /opt/etc/prngd.conf
   ln -s /opt/prngd-0.9.29/etc/prngd-seed /opt/etc/prngd-seed
   

   and refer to these links only.

Configuration

1. cat /var/adm/syslog/mail.log /var/adm/syslog/syslog.log > /opt/etc/prngd-seed 
                                                             # create some random seed
   cat /var/spool/mqueue/syslog /var/spool/mqueue/syslog.0 /var/spool/mqueue/syslog.1 > /opt/etc/prngd-seed                                                          
   /opt/bin/prngd -c /opt/etc/prngd.conf     /dev/egd-pool   # start w/o seed is possible
   /opt/bin/prngd -c /opt/etc/prngd.conf /var/run/egd-pool   # another egd-pool recognized by OpenSSH
   

2. For prngd to be available after reboot, put in /etc/rc.local:

   /opt/bin/prngd -c /opt/etc/prngd.conf -s /opt/etc/prngd-seed     /dev/egd-pool
   

/opt/bin/prngd --kill /dev/egd-pool        # specify actually used egd-pool