New on disk format - encryption

1 files changed, 69 insertions, 0 deletions

diff --git a/linux/crypto/sha256_generic.c b/linux/crypto/sha256_generic.c
new file mode 100644
index 00000000..0bd272f0
--- /dev/null
+++ b/linux/crypto/sha256_generic.c
@@ -0,0 +1,69 @@
+/*
+ * Cryptographic API.
+ *
+ * SHA-256, as specified in
+ * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
+ *
+ * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
+ *
+ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option) 
+ * any later version.
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/byteorder.h>
+#include <linux/types.h>
+#include <asm/unaligned.h>
+
+#include <linux/crypto.h>
+#include <crypto/internal/hash.h>
+
+#include <sodium/crypto_hash_sha256.h>
+
+static int sha256_init(struct shash_desc *desc)
+{
+	crypto_hash_sha256_state *state = shash_desc_ctx(desc);
+
+	return crypto_hash_sha256_init(state);
+}
+
+static int sha256_update(struct shash_desc *desc, const u8 *data,
+			  unsigned int len)
+{
+	crypto_hash_sha256_state *state = shash_desc_ctx(desc);
+
+	return crypto_hash_sha256_update(state, data, len);
+}
+
+static int sha256_final(struct shash_desc *desc, u8 *out)
+{
+	crypto_hash_sha256_state *state = shash_desc_ctx(desc);
+
+	return crypto_hash_sha256_final(state, out);
+}
+
+static struct shash_alg sha256_alg = {
+	.digestsize	= crypto_hash_sha256_BYTES,
+	.init		= sha256_init,
+	.update		= sha256_update,
+	.final		= sha256_final,
+	.descsize	= sizeof(crypto_hash_sha256_state),
+	.base		= {
+		.cra_name	= "sha256",
+		.cra_flags	= CRYPTO_ALG_TYPE_SHASH,
+	}
+};
+
+__attribute__((constructor(110)))
+static int __init sha256_generic_mod_init(void)
+{
+	return crypto_register_shash(&sha256_alg);
+}