281 строка
7.0 KiB
C
281 строка
7.0 KiB
C
/*
|
|
* Cryptographic API.
|
|
*
|
|
* SHA-224 and SHA-256 Secure Hash Algorithm.
|
|
*
|
|
* Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
|
|
*
|
|
* Based on crypto/sha256_generic.c, which is:
|
|
*
|
|
* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
|
|
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
|
|
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
|
|
* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.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 <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_sha256_store_hash(struct sha256_state *sctx)
|
|
{
|
|
u64 *hash = (u64 *)sctx->state;
|
|
|
|
write_octeon_64bit_hash_dword(hash[0], 0);
|
|
write_octeon_64bit_hash_dword(hash[1], 1);
|
|
write_octeon_64bit_hash_dword(hash[2], 2);
|
|
write_octeon_64bit_hash_dword(hash[3], 3);
|
|
}
|
|
|
|
static void octeon_sha256_read_hash(struct sha256_state *sctx)
|
|
{
|
|
u64 *hash = (u64 *)sctx->state;
|
|
|
|
hash[0] = read_octeon_64bit_hash_dword(0);
|
|
hash[1] = read_octeon_64bit_hash_dword(1);
|
|
hash[2] = read_octeon_64bit_hash_dword(2);
|
|
hash[3] = read_octeon_64bit_hash_dword(3);
|
|
}
|
|
|
|
static void octeon_sha256_transform(const void *_block)
|
|
{
|
|
const u64 *block = _block;
|
|
|
|
write_octeon_64bit_block_dword(block[0], 0);
|
|
write_octeon_64bit_block_dword(block[1], 1);
|
|
write_octeon_64bit_block_dword(block[2], 2);
|
|
write_octeon_64bit_block_dword(block[3], 3);
|
|
write_octeon_64bit_block_dword(block[4], 4);
|
|
write_octeon_64bit_block_dword(block[5], 5);
|
|
write_octeon_64bit_block_dword(block[6], 6);
|
|
octeon_sha256_start(block[7]);
|
|
}
|
|
|
|
static int octeon_sha224_init(struct shash_desc *desc)
|
|
{
|
|
struct sha256_state *sctx = shash_desc_ctx(desc);
|
|
|
|
sctx->state[0] = SHA224_H0;
|
|
sctx->state[1] = SHA224_H1;
|
|
sctx->state[2] = SHA224_H2;
|
|
sctx->state[3] = SHA224_H3;
|
|
sctx->state[4] = SHA224_H4;
|
|
sctx->state[5] = SHA224_H5;
|
|
sctx->state[6] = SHA224_H6;
|
|
sctx->state[7] = SHA224_H7;
|
|
sctx->count = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_sha256_init(struct shash_desc *desc)
|
|
{
|
|
struct sha256_state *sctx = shash_desc_ctx(desc);
|
|
|
|
sctx->state[0] = SHA256_H0;
|
|
sctx->state[1] = SHA256_H1;
|
|
sctx->state[2] = SHA256_H2;
|
|
sctx->state[3] = SHA256_H3;
|
|
sctx->state[4] = SHA256_H4;
|
|
sctx->state[5] = SHA256_H5;
|
|
sctx->state[6] = SHA256_H6;
|
|
sctx->state[7] = SHA256_H7;
|
|
sctx->count = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __octeon_sha256_update(struct sha256_state *sctx, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
unsigned int partial;
|
|
unsigned int done;
|
|
const u8 *src;
|
|
|
|
partial = sctx->count % SHA256_BLOCK_SIZE;
|
|
sctx->count += len;
|
|
done = 0;
|
|
src = data;
|
|
|
|
if ((partial + len) >= SHA256_BLOCK_SIZE) {
|
|
if (partial) {
|
|
done = -partial;
|
|
memcpy(sctx->buf + partial, data,
|
|
done + SHA256_BLOCK_SIZE);
|
|
src = sctx->buf;
|
|
}
|
|
|
|
do {
|
|
octeon_sha256_transform(src);
|
|
done += SHA256_BLOCK_SIZE;
|
|
src = data + done;
|
|
} while (done + SHA256_BLOCK_SIZE <= len);
|
|
|
|
partial = 0;
|
|
}
|
|
memcpy(sctx->buf + partial, src, len - done);
|
|
}
|
|
|
|
static int octeon_sha256_update(struct shash_desc *desc, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
struct sha256_state *sctx = shash_desc_ctx(desc);
|
|
struct octeon_cop2_state state;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* Small updates never reach the crypto engine, so the generic sha256 is
|
|
* faster because of the heavyweight octeon_crypto_enable() /
|
|
* octeon_crypto_disable().
|
|
*/
|
|
if ((sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
|
|
return crypto_sha256_update(desc, data, len);
|
|
|
|
flags = octeon_crypto_enable(&state);
|
|
octeon_sha256_store_hash(sctx);
|
|
|
|
__octeon_sha256_update(sctx, data, len);
|
|
|
|
octeon_sha256_read_hash(sctx);
|
|
octeon_crypto_disable(&state, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_sha256_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
struct sha256_state *sctx = shash_desc_ctx(desc);
|
|
static const u8 padding[64] = { 0x80, };
|
|
struct octeon_cop2_state state;
|
|
__be32 *dst = (__be32 *)out;
|
|
unsigned int pad_len;
|
|
unsigned long flags;
|
|
unsigned int index;
|
|
__be64 bits;
|
|
int i;
|
|
|
|
/* Save number of bits. */
|
|
bits = cpu_to_be64(sctx->count << 3);
|
|
|
|
/* Pad out to 56 mod 64. */
|
|
index = sctx->count & 0x3f;
|
|
pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
|
|
|
|
flags = octeon_crypto_enable(&state);
|
|
octeon_sha256_store_hash(sctx);
|
|
|
|
__octeon_sha256_update(sctx, padding, pad_len);
|
|
|
|
/* Append length (before padding). */
|
|
__octeon_sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
|
|
|
|
octeon_sha256_read_hash(sctx);
|
|
octeon_crypto_disable(&state, flags);
|
|
|
|
/* Store state in digest */
|
|
for (i = 0; i < 8; i++)
|
|
dst[i] = cpu_to_be32(sctx->state[i]);
|
|
|
|
/* Zeroize sensitive information. */
|
|
memset(sctx, 0, sizeof(*sctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_sha224_final(struct shash_desc *desc, u8 *hash)
|
|
{
|
|
u8 D[SHA256_DIGEST_SIZE];
|
|
|
|
octeon_sha256_final(desc, D);
|
|
|
|
memcpy(hash, D, SHA224_DIGEST_SIZE);
|
|
memzero_explicit(D, SHA256_DIGEST_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_sha256_export(struct shash_desc *desc, void *out)
|
|
{
|
|
struct sha256_state *sctx = shash_desc_ctx(desc);
|
|
|
|
memcpy(out, sctx, sizeof(*sctx));
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_sha256_import(struct shash_desc *desc, const void *in)
|
|
{
|
|
struct sha256_state *sctx = shash_desc_ctx(desc);
|
|
|
|
memcpy(sctx, in, sizeof(*sctx));
|
|
return 0;
|
|
}
|
|
|
|
static struct shash_alg octeon_sha256_algs[2] = { {
|
|
.digestsize = SHA256_DIGEST_SIZE,
|
|
.init = octeon_sha256_init,
|
|
.update = octeon_sha256_update,
|
|
.final = octeon_sha256_final,
|
|
.export = octeon_sha256_export,
|
|
.import = octeon_sha256_import,
|
|
.descsize = sizeof(struct sha256_state),
|
|
.statesize = sizeof(struct sha256_state),
|
|
.base = {
|
|
.cra_name = "sha256",
|
|
.cra_driver_name= "octeon-sha256",
|
|
.cra_priority = OCTEON_CR_OPCODE_PRIORITY,
|
|
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
}, {
|
|
.digestsize = SHA224_DIGEST_SIZE,
|
|
.init = octeon_sha224_init,
|
|
.update = octeon_sha256_update,
|
|
.final = octeon_sha224_final,
|
|
.descsize = sizeof(struct sha256_state),
|
|
.base = {
|
|
.cra_name = "sha224",
|
|
.cra_driver_name= "octeon-sha224",
|
|
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
|
.cra_blocksize = SHA224_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
} };
|
|
|
|
static int __init octeon_sha256_mod_init(void)
|
|
{
|
|
if (!octeon_has_crypto())
|
|
return -ENOTSUPP;
|
|
return crypto_register_shashes(octeon_sha256_algs,
|
|
ARRAY_SIZE(octeon_sha256_algs));
|
|
}
|
|
|
|
static void __exit octeon_sha256_mod_fini(void)
|
|
{
|
|
crypto_unregister_shashes(octeon_sha256_algs,
|
|
ARRAY_SIZE(octeon_sha256_algs));
|
|
}
|
|
|
|
module_init(octeon_sha256_mod_init);
|
|
module_exit(octeon_sha256_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm (OCTEON)");
|
|
MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
|