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+/*
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+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of the
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+ * License, or any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ */
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+
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+/**
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+ * @file
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+ *
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+ * Null crypto algorithm
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+ */
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+
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+#include <gpxe/crypto.h>
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+
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+static void null_init ( void *ctx __unused ) {
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+ /* Do nothing */
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+}
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+
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+static int null_setkey ( void *ctx __unused, void *key __unused,
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+ size_t keylen __unused ) {
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+ /* Do nothing */
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+ return 0;
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+}
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+
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+static void null_encode ( void *ctx __unused, const void *src __unused,
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+ void *dst __unused, size_t len __unused ) {
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+ /* Do nothing */
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+}
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+
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+static void null_decode ( void *ctx __unused, const void *src __unused,
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+ void *dst __unused, size_t len __unused ) {
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+ /* Do nothing */
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+}
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+
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+static void null_final ( void *ctx __unused, void *out __unused ) {
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+ /* Do nothing */
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+}
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+
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+struct crypto_algorithm crypto_null = {
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+ .name = "null",
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+ .ctxsize = 0,
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+ .blocksize = 1,
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+ .digestsize = 0,
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+ .init = null_init,
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+ .setkey = null_setkey,
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+ .encode = null_encode,
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+ .decode = null_decode,
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+ .final = null_final,
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+};
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