1 files changed, 72 insertions, 0 deletions
diff --git a/sys/dev/random/fenestrasX/fx_hash.h b/sys/dev/random/fenestrasX/fx_hash.h
new file mode 100644
index 000000000000..226958623b52
--- /dev/null
+++ b/sys/dev/random/fenestrasX/fx_hash.h
@@ -0,0 +1,72 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>
+ *
+ * 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.
+ * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ *
+ * $FreeBSD$
+ */
+#pragma once
+
+#include <dev/random/fenestrasX/fx_priv.h>
+#define	blake2b_init	blake2b_init_ref
+#define	blake2b_update	blake2b_update_ref
+#define	blake2b_final	blake2b_final_ref
+#include <contrib/libb2/blake2.h>
+
+#define	FXRNG_HASH_SZ	BLAKE2B_OUTBYTES	/* 64 */
+
+/*
+ * Wrappers for hash function abstraction.
+ */
+struct fxrng_hash {
+	blake2b_state	state;
+};
+
+static inline void
+fxrng_hash_init(struct fxrng_hash *h)
+{
+	int rc;
+
+	rc = blake2b_init(&h->state, FXRNG_HASH_SZ);
+	ASSERT(rc == 0, "blake2b_init");
+}
+
+static inline void
+fxrng_hash_update(struct fxrng_hash *h, const void *buf, size_t sz)
+{
+	int rc;
+
+	rc = blake2b_update(&h->state, buf, sz);
+	ASSERT(rc == 0, "blake2b_update");
+}
+
+static inline void
+fxrng_hash_finish(struct fxrng_hash *h, uint8_t buf[static FXRNG_HASH_SZ], size_t sz)
+{
+	int rc;
+
+	rc = blake2b_final(&h->state, buf, sz);
+	ASSERT(rc == 0, "blake2b_final(sz=%zu)", sz);
+	explicit_bzero(h, sizeof(*h));
+}