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Subject[PATCH 6/7] crypto: octeon - add SHA512 module
Date
Add OCTEON SHA512 module.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
---
arch/mips/cavium-octeon/crypto/Makefile | 1 +
arch/mips/cavium-octeon/crypto/octeon-sha512.c | 277 +++++++++++++++++++++++++
2 files changed, 278 insertions(+)
create mode 100644 arch/mips/cavium-octeon/crypto/octeon-sha512.c

diff --git a/arch/mips/cavium-octeon/crypto/Makefile b/arch/mips/cavium-octeon/crypto/Makefile
index 47806a5..f7aa9d5 100644
--- a/arch/mips/cavium-octeon/crypto/Makefile
+++ b/arch/mips/cavium-octeon/crypto/Makefile
@@ -7,3 +7,4 @@ obj-y += octeon-crypto.o
obj-$(CONFIG_CRYPTO_MD5_OCTEON) += octeon-md5.o
obj-$(CONFIG_CRYPTO_SHA1_OCTEON) += octeon-sha1.o
obj-$(CONFIG_CRYPTO_SHA256_OCTEON) += octeon-sha256.o
+obj-$(CONFIG_CRYPTO_SHA512_OCTEON) += octeon-sha512.o
diff --git a/arch/mips/cavium-octeon/crypto/octeon-sha512.c b/arch/mips/cavium-octeon/crypto/octeon-sha512.c
new file mode 100644
index 0000000..d5fb3c6
--- /dev/null
+++ b/arch/mips/cavium-octeon/crypto/octeon-sha512.c
@@ -0,0 +1,277 @@
+/*
+ * Cryptographic API.
+ *
+ * SHA-512 and SHA-384 Secure Hash Algorithm.
+ *
+ * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
+ *
+ * Based on crypto/sha512_generic.c, which is:
+ *
+ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
+ *
+ * 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, or (at your option) any
+ * later version.
+ */
+
+#include <linux/mm.h>
+#include <crypto/sha.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <asm/byteorder.h>
+#include <asm/octeon/octeon.h>
+#include <crypto/internal/hash.h>
+
+#include "octeon-crypto.h"
+
+/*
+ * We pass everything as 64-bit. OCTEON can handle misaligned data.
+ */
+
+static void octeon_sha512_store_hash(struct sha512_state *sctx)
+{
+ write_octeon_64bit_hash_sha512(sctx->state[0], 0);
+ write_octeon_64bit_hash_sha512(sctx->state[1], 1);
+ write_octeon_64bit_hash_sha512(sctx->state[2], 2);
+ write_octeon_64bit_hash_sha512(sctx->state[3], 3);
+ write_octeon_64bit_hash_sha512(sctx->state[4], 4);
+ write_octeon_64bit_hash_sha512(sctx->state[5], 5);
+ write_octeon_64bit_hash_sha512(sctx->state[6], 6);
+ write_octeon_64bit_hash_sha512(sctx->state[7], 7);
+}
+
+static void octeon_sha512_read_hash(struct sha512_state *sctx)
+{
+ sctx->state[0] = read_octeon_64bit_hash_sha512(0);
+ sctx->state[1] = read_octeon_64bit_hash_sha512(1);
+ sctx->state[2] = read_octeon_64bit_hash_sha512(2);
+ sctx->state[3] = read_octeon_64bit_hash_sha512(3);
+ sctx->state[4] = read_octeon_64bit_hash_sha512(4);
+ sctx->state[5] = read_octeon_64bit_hash_sha512(5);
+ sctx->state[6] = read_octeon_64bit_hash_sha512(6);
+ sctx->state[7] = read_octeon_64bit_hash_sha512(7);
+}
+
+static void octeon_sha512_transform(const void *_block)
+{
+ const u64 *block = _block;
+
+ write_octeon_64bit_block_sha512(block[0], 0);
+ write_octeon_64bit_block_sha512(block[1], 1);
+ write_octeon_64bit_block_sha512(block[2], 2);
+ write_octeon_64bit_block_sha512(block[3], 3);
+ write_octeon_64bit_block_sha512(block[4], 4);
+ write_octeon_64bit_block_sha512(block[5], 5);
+ write_octeon_64bit_block_sha512(block[6], 6);
+ write_octeon_64bit_block_sha512(block[7], 7);
+ write_octeon_64bit_block_sha512(block[8], 8);
+ write_octeon_64bit_block_sha512(block[9], 9);
+ write_octeon_64bit_block_sha512(block[10], 10);
+ write_octeon_64bit_block_sha512(block[11], 11);
+ write_octeon_64bit_block_sha512(block[12], 12);
+ write_octeon_64bit_block_sha512(block[13], 13);
+ write_octeon_64bit_block_sha512(block[14], 14);
+ octeon_sha512_start(block[15]);
+}
+
+static int octeon_sha512_init(struct shash_desc *desc)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+
+ sctx->state[0] = SHA512_H0;
+ sctx->state[1] = SHA512_H1;
+ sctx->state[2] = SHA512_H2;
+ sctx->state[3] = SHA512_H3;
+ sctx->state[4] = SHA512_H4;
+ sctx->state[5] = SHA512_H5;
+ sctx->state[6] = SHA512_H6;
+ sctx->state[7] = SHA512_H7;
+ sctx->count[0] = sctx->count[1] = 0;
+
+ return 0;
+}
+
+static int octeon_sha384_init(struct shash_desc *desc)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+
+ sctx->state[0] = SHA384_H0;
+ sctx->state[1] = SHA384_H1;
+ sctx->state[2] = SHA384_H2;
+ sctx->state[3] = SHA384_H3;
+ sctx->state[4] = SHA384_H4;
+ sctx->state[5] = SHA384_H5;
+ sctx->state[6] = SHA384_H6;
+ sctx->state[7] = SHA384_H7;
+ sctx->count[0] = sctx->count[1] = 0;
+
+ return 0;
+}
+
+static void __octeon_sha512_update(struct sha512_state *sctx, const u8 *data,
+ unsigned int len)
+{
+ unsigned int part_len;
+ unsigned int index;
+ unsigned int i;
+
+ /* Compute number of bytes mod 128. */
+ index = sctx->count[0] % SHA512_BLOCK_SIZE;
+
+ /* Update number of bytes. */
+ if ((sctx->count[0] += len) < len)
+ sctx->count[1]++;
+
+ part_len = SHA512_BLOCK_SIZE - index;
+
+ /* Transform as many times as possible. */
+ if (len >= part_len) {
+ memcpy(&sctx->buf[index], data, part_len);
+ octeon_sha512_transform(sctx->buf);
+
+ for (i = part_len; i + SHA512_BLOCK_SIZE <= len;
+ i += SHA512_BLOCK_SIZE)
+ octeon_sha512_transform(&data[i]);
+
+ index = 0;
+ } else {
+ i = 0;
+ }
+
+ /* Buffer remaining input. */
+ memcpy(&sctx->buf[index], &data[i], len - i);
+}
+
+static int octeon_sha512_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ struct octeon_cop2_state state;
+ unsigned long flags;
+
+ /*
+ * Small updates never reach the crypto engine, so the generic sha512 is
+ * faster because of the heavyweight octeon_crypto_enable() /
+ * octeon_crypto_disable().
+ */
+ if ((sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
+ return crypto_sha512_update(desc, data, len);
+
+ flags = octeon_crypto_enable(&state);
+ octeon_sha512_store_hash(sctx);
+
+ __octeon_sha512_update(sctx, data, len);
+
+ octeon_sha512_read_hash(sctx);
+ octeon_crypto_disable(&state, flags);
+
+ return 0;
+}
+
+static int octeon_sha512_final(struct shash_desc *desc, u8 *hash)
+{
+ struct sha512_state *sctx = shash_desc_ctx(desc);
+ static u8 padding[128] = { 0x80, };
+ struct octeon_cop2_state state;
+ __be64 *dst = (__be64 *)hash;
+ unsigned int pad_len;
+ unsigned long flags;
+ unsigned int index;
+ __be64 bits[2];
+ int i;
+
+ /* Save number of bits. */
+ bits[1] = cpu_to_be64(sctx->count[0] << 3);
+ bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
+
+ /* Pad out to 112 mod 128. */
+ index = sctx->count[0] & 0x7f;
+ pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
+
+ flags = octeon_crypto_enable(&state);
+ octeon_sha512_store_hash(sctx);
+
+ __octeon_sha512_update(sctx, padding, pad_len);
+
+ /* Append length (before padding). */
+ __octeon_sha512_update(sctx, (const u8 *)bits, sizeof(bits));
+
+ octeon_sha512_read_hash(sctx);
+ octeon_crypto_disable(&state, flags);
+
+ /* Store state in digest. */
+ for (i = 0; i < 8; i++)
+ dst[i] = cpu_to_be64(sctx->state[i]);
+
+ /* Zeroize sensitive information. */
+ memset(sctx, 0, sizeof(struct sha512_state));
+
+ return 0;
+}
+
+static int octeon_sha384_final(struct shash_desc *desc, u8 *hash)
+{
+ u8 D[64];
+
+ octeon_sha512_final(desc, D);
+
+ memcpy(hash, D, 48);
+ memzero_explicit(D, 64);
+
+ return 0;
+}
+
+static struct shash_alg octeon_sha512_algs[2] = { {
+ .digestsize = SHA512_DIGEST_SIZE,
+ .init = octeon_sha512_init,
+ .update = octeon_sha512_update,
+ .final = octeon_sha512_final,
+ .descsize = sizeof(struct sha512_state),
+ .base = {
+ .cra_name = "sha512",
+ .cra_driver_name= "octeon-sha512",
+ .cra_priority = OCTEON_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA512_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+}, {
+ .digestsize = SHA384_DIGEST_SIZE,
+ .init = octeon_sha384_init,
+ .update = octeon_sha512_update,
+ .final = octeon_sha384_final,
+ .descsize = sizeof(struct sha512_state),
+ .base = {
+ .cra_name = "sha384",
+ .cra_driver_name= "octeon-sha384",
+ .cra_priority = OCTEON_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA384_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+} };
+
+static int __init octeon_sha512_mod_init(void)
+{
+ if (!octeon_has_crypto())
+ return -ENOTSUPP;
+ return crypto_register_shashes(octeon_sha512_algs,
+ ARRAY_SIZE(octeon_sha512_algs));
+}
+
+static void __exit octeon_sha512_mod_fini(void)
+{
+ crypto_unregister_shashes(octeon_sha512_algs,
+ ARRAY_SIZE(octeon_sha512_algs));
+}
+
+module_init(octeon_sha512_mod_init);
+module_exit(octeon_sha512_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms (OCTEON)");
+MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
--
2.2.0


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