arm/crypto: Add optimized AES and SHA1 routines
Add assembler versions of AES and SHA1 for ARM platforms. This has provided
up to a 50% improvement in IPsec/TCP throughout for tunnels using AES128/SHA1.
Platform CPU SPeed Endian Before (bps) After (bps) Improvement
IXP425 533 MHz big 11217042 15566294 ~38%
KS8695 166 MHz little 3828549 5795373 ~51%
Signed-off-by: David McCullough <ucdevel@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/arch/arm/crypto/sha1_glue.c b/arch/arm/crypto/sha1_glue.c
new file mode 100644
index 0000000..76cd976
--- /dev/null
+++ b/arch/arm/crypto/sha1_glue.c
@@ -0,0 +1,179 @@
+/*
+ * Cryptographic API.
+ * Glue code for the SHA1 Secure Hash Algorithm assembler implementation
+ *
+ * This file is based on sha1_generic.c and sha1_ssse3_glue.c
+ *
+ * Copyright (c) Alan Smithee.
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
+ * Copyright (c) Mathias Krause <minipli@googlemail.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 <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/cryptohash.h>
+#include <linux/types.h>
+#include <crypto/sha.h>
+#include <asm/byteorder.h>
+
+struct SHA1_CTX {
+ uint32_t h0,h1,h2,h3,h4;
+ u64 count;
+ u8 data[SHA1_BLOCK_SIZE];
+};
+
+asmlinkage void sha1_block_data_order(struct SHA1_CTX *digest,
+ const unsigned char *data, unsigned int rounds);
+
+
+static int sha1_init(struct shash_desc *desc)
+{
+ struct SHA1_CTX *sctx = shash_desc_ctx(desc);
+ memset(sctx, 0, sizeof(*sctx));
+ sctx->h0 = SHA1_H0;
+ sctx->h1 = SHA1_H1;
+ sctx->h2 = SHA1_H2;
+ sctx->h3 = SHA1_H3;
+ sctx->h4 = SHA1_H4;
+ return 0;
+}
+
+
+static int __sha1_update(struct SHA1_CTX *sctx, const u8 *data,
+ unsigned int len, unsigned int partial)
+{
+ unsigned int done = 0;
+
+ sctx->count += len;
+
+ if (partial) {
+ done = SHA1_BLOCK_SIZE - partial;
+ memcpy(sctx->data + partial, data, done);
+ sha1_block_data_order(sctx, sctx->data, 1);
+ }
+
+ if (len - done >= SHA1_BLOCK_SIZE) {
+ const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
+ sha1_block_data_order(sctx, data + done, rounds);
+ done += rounds * SHA1_BLOCK_SIZE;
+ }
+
+ memcpy(sctx->data, data + done, len - done);
+ return 0;
+}
+
+
+static int sha1_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ struct SHA1_CTX *sctx = shash_desc_ctx(desc);
+ unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
+ int res;
+
+ /* Handle the fast case right here */
+ if (partial + len < SHA1_BLOCK_SIZE) {
+ sctx->count += len;
+ memcpy(sctx->data + partial, data, len);
+ return 0;
+ }
+ res = __sha1_update(sctx, data, len, partial);
+ return res;
+}
+
+
+/* Add padding and return the message digest. */
+static int sha1_final(struct shash_desc *desc, u8 *out)
+{
+ struct SHA1_CTX *sctx = shash_desc_ctx(desc);
+ unsigned int i, index, padlen;
+ __be32 *dst = (__be32 *)out;
+ __be64 bits;
+ static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
+
+ bits = cpu_to_be64(sctx->count << 3);
+
+ /* Pad out to 56 mod 64 and append length */
+ index = sctx->count % SHA1_BLOCK_SIZE;
+ padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
+ /* We need to fill a whole block for __sha1_update() */
+ if (padlen <= 56) {
+ sctx->count += padlen;
+ memcpy(sctx->data + index, padding, padlen);
+ } else {
+ __sha1_update(sctx, padding, padlen, index);
+ }
+ __sha1_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
+
+ /* Store state in digest */
+ for (i = 0; i < 5; i++)
+ dst[i] = cpu_to_be32(((u32 *)sctx)[i]);
+
+ /* Wipe context */
+ memset(sctx, 0, sizeof(*sctx));
+ return 0;
+}
+
+
+static int sha1_export(struct shash_desc *desc, void *out)
+{
+ struct SHA1_CTX *sctx = shash_desc_ctx(desc);
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+
+static int sha1_import(struct shash_desc *desc, const void *in)
+{
+ struct SHA1_CTX *sctx = shash_desc_ctx(desc);
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+
+static struct shash_alg alg = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .init = sha1_init,
+ .update = sha1_update,
+ .final = sha1_final,
+ .export = sha1_export,
+ .import = sha1_import,
+ .descsize = sizeof(struct SHA1_CTX),
+ .statesize = sizeof(struct SHA1_CTX),
+ .base = {
+ .cra_name = "sha1",
+ .cra_driver_name= "sha1-asm",
+ .cra_priority = 150,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+
+static int __init sha1_mod_init(void)
+{
+ return crypto_register_shash(&alg);
+}
+
+
+static void __exit sha1_mod_fini(void)
+{
+ crypto_unregister_shash(&alg);
+}
+
+
+module_init(sha1_mod_init);
+module_exit(sha1_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm (ARM)");
+MODULE_ALIAS("sha1");
+MODULE_AUTHOR("David McCullough <ucdevel@gmail.com>");