Adds CryptoAPI support to the Skein Hashing Algorithm driver.
Signed-off-by: Eric Rost <eric.rost@xxxxxxxxxxxxx>
---
drivers/staging/skein/Makefile | 3 +-
drivers/staging/skein/skein_base.h | 5 +
drivers/staging/skein/skein_generic.c | 199 ++++++++++++++++++++++++++++++++++
3 files changed, 206 insertions(+), 1 deletion(-)
create mode 100644 drivers/staging/skein/skein_generic.c
diff --git a/drivers/staging/skein/Makefile b/drivers/staging/skein/Makefile
index ca746a9..d8177cc 100644
--- a/drivers/staging/skein/Makefile
+++ b/drivers/staging/skein/Makefile
@@ -5,4 +5,5 @@ obj-$(CONFIG_CRYPTO_SKEIN) += skein_base.o \
skein_api.o \
skein_block.o \
threefish_block.o \
- threefish_api.o
+ threefish_api.o \
+ skein_generic.o
diff --git a/drivers/staging/skein/skein_base.h b/drivers/staging/skein/skein_base.h
index e6669f1..9f10af9 100644
--- a/drivers/staging/skein/skein_base.h
+++ b/drivers/staging/skein/skein_base.h
@@ -28,6 +28,11 @@
**
***************************************************************************/
+/*Skein digest sizes for crypto api*/
+#define SKEIN256_DIGEST_BIT_SIZE 256
+#define SKEIN512_DIGEST_BIT_SIZE 512
+#define SKEIN1024_DIGEST_BIT_SIZE 1024
+
#ifndef rotl_64
#define rotl_64(x, N) (((x) << (N)) | ((x) >> (64-(N))))
#endif
diff --git a/drivers/staging/skein/skein_generic.c b/drivers/staging/skein/skein_generic.c
new file mode 100644
index 0000000..f2d6dfb
--- /dev/null
+++ b/drivers/staging/skein/skein_generic.c
@@ -0,0 +1,199 @@
+/*
+ * Cryptographic API.
+ *
+ * Skein256 Hash Algorithm.
+ *
+ * Derived from cryptoapi implementation, adapted for in-place
+ * scatterlist interface.
+ *
+ * Copyright (c) Eric Rost <eric.rost@xxxxxxxxxxxxx>
+ *
+ * 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/types.h>
+#include <linux/init.h>
+#include <crypto/internal/hash.h>
+#include "skein_base.h"
+
+
+static int skein256_init(struct shash_desc *desc)
+{
+ return skein_256_init((struct skein_256_ctx *) shash_desc_ctx(desc),
+ SKEIN256_DIGEST_BIT_SIZE);
+}
+
+int skein256_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return skein_256_update((struct skein_256_ctx *)shash_desc_ctx(desc),
+ data, len);
+}
+
+static int skein256_final(struct shash_desc *desc, u8 *out)
+{
+ return skein_256_final((struct skein_256_ctx *)shash_desc_ctx(desc),
+ out);
+}
+
+static int skein256_export(struct shash_desc *desc, void *out)
+{
+ struct skein_256_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+static int skein256_import(struct shash_desc *desc, const void *in)
+{
+ struct skein_256_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+static int skein512_init(struct shash_desc *desc)
+{
+ return skein_512_init((struct skein_512_ctx *)shash_desc_ctx(desc),
+ SKEIN512_DIGEST_BIT_SIZE);
+}
+
+int skein512_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return skein_512_update((struct skein_512_ctx *)shash_desc_ctx(desc),
+ data, len);
+}
+
+static int skein512_final(struct shash_desc *desc, u8 *out)
+{
+ return skein_512_final((struct skein_512_ctx *)shash_desc_ctx(desc),
+ out);
+}
+
+static int skein512_export(struct shash_desc *desc, void *out)
+{
+ struct skein_512_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+static int skein512_import(struct shash_desc *desc, const void *in)
+{
+ struct skein_512_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+static int skein1024_init(struct shash_desc *desc)
+{
+ return skein_1024_init((struct skein_1024_ctx *)shash_desc_ctx(desc),
+ SKEIN1024_DIGEST_BIT_SIZE);
+}
+
+int skein1024_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return skein_1024_update((struct skein_1024_ctx *)shash_desc_ctx(desc),
+ data, len);
+}
+
+static int skein1024_final(struct shash_desc *desc, u8 *out)
+{
+ return skein_1024_final((struct skein_1024_ctx *)shash_desc_ctx(desc),
+ out);
+}
+
+static int skein1024_export(struct shash_desc *desc, void *out)
+{
+ struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+static int skein1024_import(struct shash_desc *desc, const void *in)
+{
+ struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+static struct shash_alg alg256 = {
+ .digestsize = (SKEIN256_DIGEST_BIT_SIZE / 8),
+ .init = skein256_init,
+ .update = skein256_update,
+ .final = skein256_final,
+ .export = skein256_export,
+ .import = skein256_import,
+ .descsize = sizeof(struct skein_256_ctx),
+ .statesize = sizeof(struct skein_256_ctx),
+ .base = {
+ .cra_name = "skein256",
+ .cra_driver_name = "skein",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_256_BLOCK_BYTES,
+ }
+};
+
+static struct shash_alg alg512 = {
+ .digestsize = (SKEIN512_DIGEST_BIT_SIZE / 8),
+ .init = skein512_init,
+ .update = skein512_update,
+ .final = skein512_final,
+ .export = skein512_export,
+ .import = skein512_import,
+ .descsize = sizeof(struct skein_512_ctx),
+ .statesize = sizeof(struct skein_512_ctx),
+ .base = {
+ .cra_name = "skein512",
+ .cra_driver_name = "skein",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_512_BLOCK_BYTES,
+ }
+};
+
+static struct shash_alg alg1024 = {
+ .digestsize = (SKEIN1024_DIGEST_BIT_SIZE / 8),
+ .init = skein1024_init,
+ .update = skein1024_update,
+ .final = skein1024_final,
+ .export = skein1024_export,
+ .import = skein1024_import,
+ .descsize = sizeof(struct skein_1024_ctx),
+ .statesize = sizeof(struct skein_1024_ctx),
+ .base = {
+ .cra_name = "skein1024",
+ .cra_driver_name = "skein",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_1024_BLOCK_BYTES,
+ }
+};
+
+static int __init skein_generic_init(void)
+{
+ if (crypto_register_shash(&alg256))
+ goto out;
+ if (crypto_register_shash(&alg512))
+ goto unreg256;
+ if (crypto_register_shash(&alg1024))
+ goto unreg512;
+
+ return 0;
+
+
+unreg512:
+ crypto_unregister_shash(&alg512);
+unreg256:
+ crypto_unregister_shash(&alg256);
+out:
+ return -1;
+}
+
+device_initcall(skein_generic_init);
--
2.1.1
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