Serpent SSE2 assembler implementations only provide 4-way/8-way parallel
functions and need setkey and one-block encrypt/decrypt functions.
CC: Dag Arne Osvik <osvik@xxxxxxxxx>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxxxx>
---
crypto/serpent.c | 41 ++++++++++++++++++++++-------------------
include/crypto/serpent.h | 25 +++++++++++++++++++++++++
2 files changed, 47 insertions(+), 19 deletions(-)
create mode 100644 include/crypto/serpent.h
diff --git a/crypto/serpent.c b/crypto/serpent.c
index b651a55..867ca93 100644
--- a/crypto/serpent.c
+++ b/crypto/serpent.c
@@ -21,16 +21,12 @@
#include <asm/byteorder.h>
#include <linux/crypto.h>
#include <linux/types.h>
+#include <crypto/serpent.h>
/* Key is padded to the maximum of 256 bits before round key generation.
* Any key length <= 256 bits (32 bytes) is allowed by the algorithm.
*/
-#define SERPENT_MIN_KEY_SIZE 0
-#define SERPENT_MAX_KEY_SIZE 32
-#define SERPENT_EXPKEY_WORDS 132
-#define SERPENT_BLOCK_SIZE 16
-
#define PHI 0x9e3779b9UL
#define keyiter(a,b,c,d,i,j) \
@@ -210,13 +206,7 @@
x1 ^= x4; x3 ^= x4; x4 &= x0; \
x4 ^= x2;
-struct serpent_ctx {
- u32 expkey[SERPENT_EXPKEY_WORDS];
-};
-
-
-static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen)
+int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
u32 *k = ctx->expkey;
@@ -359,12 +349,11 @@ static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
return 0;
}
+EXPORT_SYMBOL_GPL(serpent_setkey);
-static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
{
- struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
- const u32
- *k = ctx->expkey;
+ const u32 *k = ctx->expkey;
const __le32 *s = (const __le32 *)src;
__le32 *d = (__le32 *)dst;
u32 r0, r1, r2, r3, r4;
@@ -418,12 +407,18 @@ static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
d[2] = cpu_to_le32(r2);
d[3] = cpu_to_le32(r3);
}
+EXPORT_SYMBOL_GPL(__serpent_encrypt);
-static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
- const u32
- *k = ((struct serpent_ctx *)ctx)->expkey;
+
+ __serpent_encrypt(ctx, dst, src);
+}
+
+void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
+{
+ const u32 *k = ctx->expkey;
const __le32 *s = (const __le32 *)src;
__le32 *d = (__le32 *)dst;
u32 r0, r1, r2, r3, r4;
@@ -472,6 +467,14 @@ static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
d[2] = cpu_to_le32(r1);
d[3] = cpu_to_le32(r4);
}
+EXPORT_SYMBOL_GPL(__serpent_decrypt);
+
+static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ __serpent_decrypt(ctx, dst, src);
+}
static struct crypto_alg serpent_alg = {
.cra_name = "serpent",
diff --git a/include/crypto/serpent.h b/include/crypto/serpent.h
new file mode 100644
index 0000000..40df885
--- /dev/null
+++ b/include/crypto/serpent.h
@@ -0,0 +1,25 @@
+/*
+ * Common values for serpent algorithms
+ */
+
+#ifndef _CRYPTO_SERPENT_H
+#define _CRYPTO_SERPENT_H
+
+#include <linux/types.h>
+#include <linux/crypto.h>
+
+#define SERPENT_MIN_KEY_SIZE 0
+#define SERPENT_MAX_KEY_SIZE 32
+#define SERPENT_EXPKEY_WORDS 132
+#define SERPENT_BLOCK_SIZE 16
+
+struct serpent_ctx {
+ u32 expkey[SERPENT_EXPKEY_WORDS];
+};
+
+int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen);
+
+void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src);
+void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src);
+
+#endif
--
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