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Date: Wed, 22 Oct 2014 21:24:37 -0500
From: Eric Rost <eric.rost@...abylon.net>
To: gregkh@...uxfoundation.org, jason@...edaemon.net, jake@....net,
antonysaraev@...il.com
Cc: devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] staging: skein: Add Loadable Module Support
Adds loadable module support for skein_mod, containing skein256,
skein512, and skein1024 algorithms.
Signed-off-by: Eric Rost <eric.rost@...abylon.net>
---
drivers/staging/skein/Kconfig | 2 +-
drivers/staging/skein/skein_generic.c | 122 ++++++++++++++++++++++++++++++++++
2 files changed, 123 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/skein/Kconfig b/drivers/staging/skein/Kconfig
index de8bdd7..012a823 100644
--- a/drivers/staging/skein/Kconfig
+++ b/drivers/staging/skein/Kconfig
@@ -1,5 +1,5 @@
config CRYPTO_SKEIN
- bool "Skein digest algorithm"
+ tristate "Skein digest algorithm"
depends on (X86 || UML_X86) && 64BIT && CRYPTO
select CRYPTO_HASH
select CRYPTO_ALGAPI
diff --git a/drivers/staging/skein/skein_generic.c b/drivers/staging/skein/skein_generic.c
index 14cc5bd..43e3cdf 100644
--- a/drivers/staging/skein/skein_generic.c
+++ b/drivers/staging/skein/skein_generic.c
@@ -16,6 +16,7 @@
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
+#include <linux/module.h>
#include <linux/mm.h>
#include <linux/cryptohash.h>
#include <linux/types.h>
@@ -50,6 +51,22 @@ static int skein256_final(struct shash_desc *desc, u8 *out)
return ret;
}
+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)
{
struct skein_512_ctx *sctx = shash_desc_ctx(desc);
@@ -78,6 +95,22 @@ static int skein512_final(struct shash_desc *desc, u8 *out)
return ret;
}
+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)
{
struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
@@ -106,4 +139,93 @@ static int skein1024_final(struct shash_desc *desc, u8 *out)
return ret;
}
+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-mod",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_256_BLOCK_BYTES,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+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-mod",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_512_BLOCK_BYTES,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+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-mod",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_1024_BLOCK_BYTES,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static int __init skein_generic_mod_init(void)
+{
+ return crypto_register_shash(&alg256) || crypto_register_shash(&alg512)
+ || crypto_register_shash(&alg1024);
+}
+
+static void __exit skein_generic_mod_fini(void)
+{
+ crypto_unregister_shash(&alg256);
+ crypto_unregister_shash(&alg512);
+ crypto_unregister_shash(&alg1024);
+}
+
+module_init(skein_generic_mod_init);
+module_exit(skein_generic_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Skein Hash Algorithm");
+MODULE_ALIAS("skein");
--
2.1.1
--
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