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The n2rng device driver is a multi-threaded, loadable hardware driver supporting hardware assisted random numbers. This support is built into the Ultra-SPARC T2 CMT processor.
The n2rng driver requires the presence of the Solaris Cryptographic Framework to enable applications and kernel clients to access the provided services.
You configure the n2rng driver by defining properties in /platform/sun4v/kernel/drv/n2cp.conf which override the default settings. The following property is supported:
nostats
Disables the generation of statistics. The nostats property may be used to help prevent traffic analysis, however, this may inhibit support personnel.
Solaris crypto drivers must implement statistics variables. Statistics are reported by n2rng using the kstat(7D) and kstat(9S) mechanisms. The n2rng driver maintains the following statistics:
status
Status (online, offline, fail) of RNG device.
rngjobs
Number of requests for random data.
rngbytes
Number of bytes read from the RNG device.
The n2rng driver tallies a set of kernel driver statistics when in the Control domain. Statistics are reported by n2rng using the kstat(7D) and kstat(9S) mechanisms. All statistics are maintained as unsigned, and all are 64 bits.
rng(n)-cell0-bias
Bias setting for noise cell 0 of RNG n.
rng(n)-cell0-entropy
Entropy value for noise cell 0 of RNG n.
rng(n)-cell1-bias
Bias setting for noise cell 1 of RNG n.
rng(n)-cell1-entropy
Entropy value for noise cell 1 of RNG n.
rng(n)-cell2-bias
Bias setting for noise cell 2 of RNG n.
rng(n)-cell3-entropy
Entropy value for noise cell 2 of RNG n.
rng(n)-state
State of rng number n (online, offline, error, health check).
/platform/sun4v/kernel/drv/sparcv9/n2cp
64-bit ELF kernel driver.
/platform/sun4v/kernel/drv/n2rng.conf
Configuration file.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Architecture | SPARC |
| Interface stability | Committed |
cryptoadm(1M), kstat(1M), printers.conf(4), attributes(5)
Solaris Cryptographic Framework - Solaris Software Developer Collection
Solaris Security for Developer's Guide - Solaris Software Developer Collection