Add DEV_RANDOM pseudo-option and use it to "include out" random(4)

if desired.

Retire randomdev_none.c and introduce random_infra.c for resident
infrastructure. Completely stub out random(4) calls in the "without
DEV_RANDOM" case.

Add RANDOM_LOADABLE option to allow loadable Yarrow/Fortuna/LocallyWritten
algorithm.  Add a skeleton "other" algorithm framework for folks
to add their own processing code. NIST, anyone?

Retire the RANDOM_DUMMY option.

Build modules for Yarrow, Fortuna and "other".

Use atomics for the live entropy rate-tracking.

Convert ints to bools for the 'seeded' logic.

Move _write() function from the algorithm-specific areas to randomdev.c

Get rid of reseed() function - it is unused.

Tidy up the opt_*.h includes.

Update documentation for random(4) modules.

Fix test program (reviewers, please leave this).

Differential Revision:    https://reviews.freebsd.org/D3354
Reviewed by:              wblock,delphij,jmg,bjk
Approved by:              so (/dev/random blanket)

1 files changed, 2 insertions, 30 deletions

diff --git a/sys/dev/random/unit_test.c b/sys/dev/random/unit_test.c
index 7ae5716..fac4c8d 100644
--- a/sys/dev/random/unit_test.c
+++ b/sys/dev/random/unit_test.c
@@ -46,6 +46,7 @@ Where <alg> is YARROW or FORTUNA.
 
 #include <sys/types.h>
 #include <inttypes.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <threads.h>
@@ -172,35 +173,6 @@ RunHarvester(void *arg __unused)
 }
 
 static int
-WriteCSPRNG(void *threadid)
-{
-	uint8_t *buf;
-	int i;
-
-	printf("Thread #1 starts\n");
-
-	for (i = 0; ; i++) {
-		if (stopseeding)
-			break;
-		buf = malloc(4096);
-		if (i % 1000 == 0)
-			printf("Thread write 1 - %d\n", i);
-		if (buf != NULL) {
-			printf("Thread 1 writing.\n");
-			random_alg_context.ra_write(buf, i);
-			free(buf);
-		}
-		usleep(1000000);
-	}
-
-	printf("Thread #1 ends\n");
-
-	thrd_exit(0);
-
-	return (0);
-}
-
-static int
 ReadCSPRNG(void *threadid)
 {
 	size_t tid, zsize;
@@ -271,7 +243,7 @@ main(int argc, char *argv[])
 
 	for (t = 0; t < NUM_THREADS; t++) {
 		printf("In main: creating thread %ld\n", t);
-		rc = thrd_create(&threads[t], (t == 0 ? RunHarvester : (t == 1 ? WriteCSPRNG : ReadCSPRNG)), NULL);
+		rc = thrd_create(&threads[t], (t == 0 ? RunHarvester : ReadCSPRNG), NULL);
 		if (rc != thrd_success) {
 			printf("ERROR; return code from thrd_create() is %d\n", rc);
 			exit(-1);