244 lines
6.1 KiB
C
244 lines
6.1 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) 2010 Ralph Hempel <ralph.hempel@lantiq.com>
|
|
* Copyright (C) 2009 Mohammad Firdaus
|
|
*/
|
|
|
|
/*!
|
|
\defgroup IFX_DEU IFX_DEU_DRIVERS
|
|
\ingroup API
|
|
\brief ifx deu driver module
|
|
*/
|
|
|
|
/*!
|
|
\file ifxmips_sha1.c
|
|
\ingroup IFX_DEU
|
|
\brief SHA1 encryption deu driver file
|
|
*/
|
|
|
|
/*!
|
|
\defgroup IFX_SHA1_FUNCTIONS IFX_SHA1_FUNCTIONS
|
|
\ingroup IFX_DEU
|
|
\brief ifx deu sha1 functions
|
|
*/
|
|
|
|
|
|
/* Project header */
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/cryptohash.h>
|
|
#include <linux/types.h>
|
|
#include <asm/scatterlist.h>
|
|
#include <asm/byteorder.h>
|
|
#include "ifxmips_deu.h"
|
|
|
|
#define SHA1_DIGEST_SIZE 20
|
|
#define SHA1_HMAC_BLOCK_SIZE 64
|
|
#define HASH_START IFX_HASH_CON
|
|
|
|
static spinlock_t lock;
|
|
#define CRTCL_SECT_INIT spin_lock_init(&lock)
|
|
#define CRTCL_SECT_START spin_lock_irqsave(&lock, flag)
|
|
#define CRTCL_SECT_END spin_unlock_irqrestore(&lock, flag)
|
|
|
|
/*
|
|
* \brief SHA1 private structure
|
|
*/
|
|
struct sha1_ctx {
|
|
u64 count;
|
|
u32 state[5];
|
|
u8 buffer[64];
|
|
};
|
|
|
|
extern int disable_deudma;
|
|
|
|
|
|
/*! \fn static void sha1_transform (u32 *state, const u32 *in)
|
|
* \ingroup IFX_SHA1_FUNCTIONS
|
|
* \brief main interface to sha1 hardware
|
|
* \param state current state
|
|
* \param in 64-byte block of input
|
|
*/
|
|
static void sha1_transform (u32 *state, const u32 *in)
|
|
{
|
|
int i = 0;
|
|
volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START;
|
|
u32 flag;
|
|
|
|
CRTCL_SECT_START;
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
hashs->MR = in[i];
|
|
};
|
|
|
|
//wait for processing
|
|
while (hashs->controlr.BSY) {
|
|
// this will not take long
|
|
}
|
|
|
|
CRTCL_SECT_END;
|
|
}
|
|
|
|
/*! \fn static void sha1_init(struct crypto_tfm *tfm)
|
|
* \ingroup IFX_SHA1_FUNCTIONS
|
|
* \brief initialize sha1 hardware
|
|
* \param tfm linux crypto algo transform
|
|
*/
|
|
static void sha1_init(struct crypto_tfm *tfm)
|
|
{
|
|
struct sha1_ctx *sctx = crypto_tfm_ctx(tfm);
|
|
|
|
SHA_HASH_INIT;
|
|
|
|
sctx->count = 0;
|
|
}
|
|
|
|
/*! \fn static void sha1_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
|
|
* \ingroup IFX_SHA1_FUNCTIONS
|
|
* \brief on-the-fly sha1 computation
|
|
* \param tfm linux crypto algo transform
|
|
* \param data input data
|
|
* \param len size of input data
|
|
*/
|
|
static void sha1_update(struct crypto_tfm *tfm, const u8 *data,
|
|
unsigned int len)
|
|
{
|
|
struct sha1_ctx *sctx = crypto_tfm_ctx(tfm);
|
|
unsigned int i, j;
|
|
|
|
j = (sctx->count >> 3) & 0x3f;
|
|
sctx->count += len << 3;
|
|
|
|
if ((j + len) > 63) {
|
|
memcpy (&sctx->buffer[j], data, (i = 64 - j));
|
|
sha1_transform (sctx->state, (const u32 *)sctx->buffer);
|
|
for (; i + 63 < len; i += 64) {
|
|
sha1_transform (sctx->state, (const u32 *)&data[i]);
|
|
}
|
|
|
|
j = 0;
|
|
}
|
|
else
|
|
i = 0;
|
|
|
|
memcpy (&sctx->buffer[j], &data[i], len - i);
|
|
}
|
|
|
|
/*! \fn static void sha1_final(struct crypto_tfm *tfm, u8 *out)
|
|
* \ingroup IFX_SHA1_FUNCTIONS
|
|
* \brief compute final sha1 value
|
|
* \param tfm linux crypto algo transform
|
|
* \param out final md5 output value
|
|
*/
|
|
static void sha1_final(struct crypto_tfm *tfm, u8 *out)
|
|
{
|
|
struct sha1_ctx *sctx = crypto_tfm_ctx(tfm);
|
|
u32 index, padlen;
|
|
u64 t;
|
|
u8 bits[8] = { 0, };
|
|
static const u8 padding[64] = { 0x80, };
|
|
volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START;
|
|
ulong flag;
|
|
|
|
t = sctx->count;
|
|
bits[7] = 0xff & t;
|
|
t >>= 8;
|
|
bits[6] = 0xff & t;
|
|
t >>= 8;
|
|
bits[5] = 0xff & t;
|
|
t >>= 8;
|
|
bits[4] = 0xff & t;
|
|
t >>= 8;
|
|
bits[3] = 0xff & t;
|
|
t >>= 8;
|
|
bits[2] = 0xff & t;
|
|
t >>= 8;
|
|
bits[1] = 0xff & t;
|
|
t >>= 8;
|
|
bits[0] = 0xff & t;
|
|
|
|
/* Pad out to 56 mod 64 */
|
|
index = (sctx->count >> 3) & 0x3f;
|
|
padlen = (index < 56) ? (56 - index) : ((64 + 56) - index);
|
|
sha1_update (tfm, padding, padlen);
|
|
|
|
/* Append length */
|
|
sha1_update (tfm, bits, sizeof bits);
|
|
|
|
CRTCL_SECT_START;
|
|
|
|
*((u32 *) out + 0) = hashs->D1R;
|
|
*((u32 *) out + 1) = hashs->D2R;
|
|
*((u32 *) out + 2) = hashs->D3R;
|
|
*((u32 *) out + 3) = hashs->D4R;
|
|
*((u32 *) out + 4) = hashs->D5R;
|
|
|
|
CRTCL_SECT_END;
|
|
|
|
// Wipe context
|
|
memset (sctx, 0, sizeof *sctx);
|
|
}
|
|
|
|
/*
|
|
* \brief SHA1 function mappings
|
|
*/
|
|
struct crypto_alg ifxdeu_sha1_alg = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name= "ifxdeu-sha1",
|
|
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
|
|
.cra_blocksize = SHA1_HMAC_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sha1_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_alignmask = 3,
|
|
.cra_list = LIST_HEAD_INIT(ifxdeu_sha1_alg.cra_list),
|
|
.cra_u = { .digest = {
|
|
.dia_digestsize = SHA1_DIGEST_SIZE,
|
|
.dia_init = sha1_init,
|
|
.dia_update = sha1_update,
|
|
.dia_final = sha1_final } }
|
|
};
|
|
|
|
/*! \fn int __init ifxdeu_init_sha1 (void)
|
|
* \ingroup IFX_SHA1_FUNCTIONS
|
|
* \brief initialize sha1 driver
|
|
*/
|
|
int __init ifxdeu_init_sha1 (void)
|
|
{
|
|
int ret;
|
|
|
|
if ((ret = crypto_register_alg(&ifxdeu_sha1_alg)))
|
|
goto sha1_err;
|
|
|
|
CRTCL_SECT_INIT;
|
|
|
|
printk (KERN_NOTICE "IFX DEU SHA1 initialized%s.\n", disable_deudma ? "" : " (DMA)");
|
|
return ret;
|
|
|
|
sha1_err:
|
|
printk(KERN_ERR "IFX DEU SHA1 initialization failed!\n");
|
|
return ret;
|
|
}
|
|
|
|
/*! \fn void __exit ifxdeu_fini_sha1 (void)
|
|
* \ingroup IFX_SHA1_FUNCTIONS
|
|
* \brief unregister sha1 driver
|
|
*/
|
|
void __exit ifxdeu_fini_sha1 (void)
|
|
{
|
|
crypto_unregister_alg (&ifxdeu_sha1_alg);
|
|
}
|