Assuring that you have a device node
The cryptographic device driver registers as a misc device and provides a default device node to user space.
Both the major and minor number can be dynamic, depending on your Linux® distribution and configuration.
The major device number is then that of the misc devices. You can find it as the value for the
entry misc
in /proc/devices.
The minor number is dynamically assigned and you can find it in /proc/misc
as the value for the entry z90crypt
.
If the device node /dev/z90crypt is not created for you, you can create it
yourself by issuing a command of this form:
# mknod /dev/z90crypt c <misc_major> <dynamic_minor>