1 files changed, 93 insertions, 0 deletions

diff --git a/sys/dev/random/randomdev_soft.h b/sys/dev/random/randomdev_soft.h
new file mode 100644
index 000000000000..46bb006f4664
--- /dev/null
+++ b/sys/dev/random/randomdev_soft.h
@@ -0,0 +1,93 @@
+/*-
+ * Copyright (c) 2000-2004 Mark R V Murray
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer
+ *    in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/* This header contains only those definitions that are global
+ * and harvester-specific for the entropy processor
+ */
+
+/* #define ENTROPYSOURCE nn	   entropy sources (actually classes)
+ *					This is properly defined in
+ *					an enum in sys/random.h
+ */
+
+/* Cryptographic block size in bits */
+#define	BLOCKSIZE	256
+
+/* The ring size _MUST_ be a power of 2 */
+#define HARVEST_RING_SIZE	1024	/* harvest ring buffer size */
+#define HARVEST_RING_MASK	(HARVEST_RING_SIZE - 1)
+
+#define HARVESTSIZE	16	/* max size of each harvested entropy unit */
+
+MALLOC_DECLARE(M_ENTROPY);
+
+/* These are used to queue harvested packets of entropy. The entropy
+ * buffer size is pretty arbitrary.
+ */
+struct harvest {
+	uintmax_t somecounter;		/* fast counter for clock jitter */
+	u_char entropy[HARVESTSIZE];	/* the harvested entropy */
+	u_int size, bits, frac;		/* stats about the entropy */
+	enum esource source;		/* stats about the entropy */
+	STAILQ_ENTRY(harvest) next;	/* next item on the list */
+};
+
+void random_yarrow_init(void);
+void random_yarrow_deinit(void);
+
+int random_yarrow_read(void *, int);
+void random_yarrow_write(void *, int);
+
+void random_yarrow_init_harvester(void (*)(u_int64_t, const void *, u_int,
+	u_int, u_int, enum esource), int (*)(void *, int));
+void random_yarrow_deinit_harvester(void);
+
+void random_set_wakeup_exit(void *);
+void random_process_event(struct harvest *event);
+void random_yarrow_reseed(void);
+void random_yarrow_unblock(void);
+
+void random_yarrow_init_alg(struct sysctl_ctx_list *, struct sysctl_oid *);
+void random_yarrow_deinit_alg(void);
+
+extern struct random_systat random_yarrow;
+
+/* If this was c++, this would be a template */
+#define RANDOM_CHECK_UINT(name, min, max)				\
+static int								\
+random_check_uint_##name(SYSCTL_HANDLER_ARGS)				\
+{									\
+	if (oidp->oid_arg1 != NULL) {					\
+		 if (*(u_int *)(oidp->oid_arg1) <= (min))		\
+			*(u_int *)(oidp->oid_arg1) = (min);		\
+		 else if (*(u_int *)(oidp->oid_arg1) > (max))		\
+			*(u_int *)(oidp->oid_arg1) = (max);		\
+	}								\
+        return sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2,	\
+		req);							\
+}