1 files changed, 105 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sha256.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sha256.c
new file mode 100644
index 000000000000..34c909f0c71a
--- /dev/null
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sha256.c
@@ -0,0 +1,105 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * Copyright 2013 Saso Kiselkov. All rights reserved.
+ * Copyright (c) 2016 by Delphix. All rights reserved.
+ */
+#include <sys/zfs_context.h>
+#include <sys/zio.h>
+#ifdef _KERNEL
+#include <crypto/sha2/sha256.h>
+#include <crypto/sha2/sha512t.h>
+#else
+#include <sha256.h>
+#include <sha512t.h>
+#endif
+#include <sys/abd.h>
+
+static int
+sha256_incremental(void *buf, size_t size, void *arg)
+{
+	SHA256_CTX *ctx = arg;
+	SHA256_Update(ctx, buf, size);
+	return (0);
+}
+
+static int
+sha512_incremental(void *buf, size_t size, void *arg)
+{
+	SHA512_CTX *ctx = arg;
+	SHA512_256_Update(ctx, buf, size);
+	return (0);
+}
+
+/*ARGSUSED*/
+void
+abd_checksum_SHA256(abd_t *abd, uint64_t size,
+    const void *ctx_template, zio_cksum_t *zcp)
+{
+	SHA256_CTX ctx;
+	zio_cksum_t tmp;
+
+	SHA256_Init(&ctx);
+	(void) abd_iterate_func(abd, 0, size, sha256_incremental, &ctx);
+	SHA256_Final((unsigned char *)&tmp, &ctx);
+
+	/*
+	 * A prior implementation of this function had a
+	 * private SHA256 implementation always wrote things out in
+	 * Big Endian and there wasn't a byteswap variant of it.
+	 * To preserve on disk compatibility we need to force that
+	 * behavior.
+	 */
+	zcp->zc_word[0] = BE_64(tmp.zc_word[0]);
+	zcp->zc_word[1] = BE_64(tmp.zc_word[1]);
+	zcp->zc_word[2] = BE_64(tmp.zc_word[2]);
+	zcp->zc_word[3] = BE_64(tmp.zc_word[3]);
+}
+
+/*ARGSUSED*/
+void
+abd_checksum_SHA512_native(abd_t *abd, uint64_t size,
+    const void *ctx_template, zio_cksum_t *zcp)
+{
+	SHA512_CTX	ctx;
+
+	SHA512_256_Init(&ctx);
+	(void) abd_iterate_func(abd, 0, size, sha512_incremental, &ctx);
+	SHA512_256_Final((unsigned char *)zcp, &ctx);
+}
+
+/*ARGSUSED*/
+void
+abd_checksum_SHA512_byteswap(abd_t *abd, uint64_t size,
+    const void *ctx_template, zio_cksum_t *zcp)
+{
+	zio_cksum_t	tmp;
+
+	abd_checksum_SHA512_native(abd, size, ctx_template, &tmp);
+	zcp->zc_word[0] = BSWAP_64(tmp.zc_word[0]);
+	zcp->zc_word[1] = BSWAP_64(tmp.zc_word[1]);
+	zcp->zc_word[2] = BSWAP_64(tmp.zc_word[2]);
+	zcp->zc_word[3] = BSWAP_64(tmp.zc_word[3]);
+}