You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
388 lines
11 KiB
C
388 lines
11 KiB
C
/******************************************************************************
|
|
**
|
|
** FILE NAME : ifxmips_md5_hmac.c
|
|
** PROJECT : IFX UEIP
|
|
** MODULES : DEU Module for UEIP
|
|
**
|
|
** DATE : September 8, 2009
|
|
** AUTHOR : Mohammad Firdaus
|
|
** DESCRIPTION : Data Encryption Unit Driver
|
|
** COPYRIGHT : Copyright (c) 2009
|
|
** Infineon Technologies AG
|
|
** Am Campeon 1-12, 85579 Neubiberg, Germany
|
|
**
|
|
** 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.
|
|
**
|
|
** HISTORY
|
|
** $Date $Author $Comment
|
|
** 08,Sept 2009 Mohammad Firdaus Initial UEIP release
|
|
** 21,March 2011 Mohammad Firdaus Changes for Kernel 2.6.32 and IPSec integration
|
|
*******************************************************************************/
|
|
/*!
|
|
\defgroup IFX_DEU IFX_DEU_DRIVERS
|
|
\ingroup API
|
|
\brief ifx deu driver module
|
|
*/
|
|
|
|
/*!
|
|
\file ifxmips_md5_hmac.c
|
|
\ingroup IFX_DEU
|
|
\brief MD5-HMAC encryption deu driver file
|
|
*/
|
|
|
|
/*!
|
|
\defgroup IFX_MD5_HMAC_FUNCTIONS IFX_MD5_HMAC_FUNCTIONS
|
|
\ingroup IFX_DEU
|
|
\brief ifx md5-hmac driver functions
|
|
*/
|
|
|
|
/* Project Header files */
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/types.h>
|
|
#include <crypto/internal/hash.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
#if defined(CONFIG_AR9)
|
|
#include "ifxmips_deu_ar9.h"
|
|
#elif defined(CONFIG_VR9) || defined(CONFIG_AR10)
|
|
#include "ifxmips_deu_vr9.h"
|
|
#else
|
|
#error "Plaform Unknwon!"
|
|
#endif
|
|
|
|
#define MD5_DIGEST_SIZE 16
|
|
#define MD5_HMAC_BLOCK_SIZE 64
|
|
#define MD5_BLOCK_WORDS 16
|
|
#define MD5_HASH_WORDS 4
|
|
#define MD5_HMAC_DBN_TEMP_SIZE 1024 // size in dword, needed for dbn workaround
|
|
#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)
|
|
|
|
//#define CRYPTO_DEBUG
|
|
#ifdef CRYPTO_DEBUG
|
|
extern char debug_level;
|
|
#define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args);
|
|
#else
|
|
#define DPRINTF(level, format, args...)
|
|
#endif
|
|
|
|
#define MAX_HASH_KEYLEN 64
|
|
|
|
struct md5_hmac_ctx {
|
|
u8 key[MAX_HASH_KEYLEN];
|
|
u32 hash[MD5_HASH_WORDS];
|
|
u32 block[MD5_BLOCK_WORDS];
|
|
u64 byte_count;
|
|
u32 dbn;
|
|
unsigned int keylen;
|
|
};
|
|
|
|
static u32 temp[MD5_HMAC_DBN_TEMP_SIZE];
|
|
|
|
extern int disable_deudma;
|
|
|
|
/*! \fn static u32 endian_swap(u32 input)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief perform dword level endian swap
|
|
* \param input value of dword that requires to be swapped
|
|
*/
|
|
static u32 endian_swap(u32 input)
|
|
{
|
|
u8 *ptr = (u8 *)&input;
|
|
|
|
return ((ptr[3] << 24) | (ptr[2] << 16) | (ptr[1] << 8) | ptr[0]);
|
|
}
|
|
|
|
/*! \fn static void md5_hmac_transform(struct crypto_tfm *tfm, u32 const *in)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief save input block to context
|
|
* \param tfm linux crypto algo transform
|
|
* \param in 64-byte block of input
|
|
*/
|
|
static void md5_hmac_transform(struct shash_desc *desc, u32 const *in)
|
|
{
|
|
struct md5_hmac_ctx *mctx = crypto_shash_ctx(desc->tfm);
|
|
|
|
memcpy(&temp[mctx->dbn<<4], in, 64); //dbn workaround
|
|
mctx->dbn += 1;
|
|
|
|
if ( (mctx->dbn<<4) > MD5_HMAC_DBN_TEMP_SIZE )
|
|
{
|
|
printk("MD5_HMAC_DBN_TEMP_SIZE exceeded\n");
|
|
}
|
|
|
|
}
|
|
|
|
/*! \fn int md5_hmac_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief sets md5 hmac key
|
|
* \param tfm linux crypto algo transform
|
|
* \param key input key
|
|
* \param keylen key length greater than 64 bytes IS NOT SUPPORTED
|
|
*/
|
|
static int md5_hmac_setkey(struct crypto_shash *tfm, const u8 *key, unsigned int keylen)
|
|
{
|
|
struct md5_hmac_ctx *mctx = crypto_shash_ctx(tfm);
|
|
volatile struct deu_hash_t *hash = (struct deu_hash_t *) HASH_START;
|
|
//printk("copying keys to context with length %d\n", keylen);
|
|
|
|
if (keylen > MAX_HASH_KEYLEN) {
|
|
printk("Key length more than what DEU hash can handle\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
hash->KIDX |= 0x80000000; // reset all 16 words of the key to '0'
|
|
memcpy(&mctx->key, key, keylen);
|
|
mctx->keylen = keylen;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
/*! \fn int md5_hmac_setkey_hw(const u8 *key, unsigned int keylen)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief sets md5 hmac key into the hardware registers
|
|
* \param key input key
|
|
* \param keylen key length greater than 64 bytes IS NOT SUPPORTED
|
|
*/
|
|
|
|
static int md5_hmac_setkey_hw(const u8 *key, unsigned int keylen)
|
|
{
|
|
volatile struct deu_hash_t *hash = (struct deu_hash_t *) HASH_START;
|
|
unsigned long flag;
|
|
int i, j;
|
|
u32 *in_key = (u32 *)key;
|
|
|
|
//printk("\nsetkey keylen: %d\n key: ", keylen);
|
|
|
|
CRTCL_SECT_START;
|
|
j = 0;
|
|
for (i = 0; i < keylen; i+=4)
|
|
{
|
|
hash->KIDX = j;
|
|
asm("sync");
|
|
hash->KEY = *((u32 *) in_key + j);
|
|
asm("sync");
|
|
j++;
|
|
}
|
|
CRTCL_SECT_END;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! \fn void md5_hmac_init(struct crypto_tfm *tfm)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief initialize md5 hmac context
|
|
* \param tfm linux crypto algo transform
|
|
*/
|
|
static int md5_hmac_init(struct shash_desc *desc)
|
|
{
|
|
|
|
struct md5_hmac_ctx *mctx = crypto_shash_ctx(desc->tfm);
|
|
|
|
|
|
mctx->dbn = 0; //dbn workaround
|
|
md5_hmac_setkey_hw(mctx->key, mctx->keylen);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(md5_hmac_init);
|
|
|
|
/*! \fn void md5_hmac_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief on-the-fly md5 hmac computation
|
|
* \param tfm linux crypto algo transform
|
|
* \param data input data
|
|
* \param len size of input data
|
|
*/
|
|
static int md5_hmac_update(struct shash_desc *desc, const u8 *data, unsigned int len)
|
|
{
|
|
struct md5_hmac_ctx *mctx = crypto_shash_ctx(desc->tfm);
|
|
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
|
|
|
|
mctx->byte_count += len;
|
|
|
|
if (avail > len) {
|
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
|
data, len);
|
|
return 0;
|
|
}
|
|
|
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
|
data, avail);
|
|
|
|
md5_hmac_transform(desc, mctx->block);
|
|
data += avail;
|
|
len -= avail;
|
|
|
|
while (len >= sizeof(mctx->block)) {
|
|
memcpy(mctx->block, data, sizeof(mctx->block));
|
|
md5_hmac_transform(desc, mctx->block);
|
|
data += sizeof(mctx->block);
|
|
len -= sizeof(mctx->block);
|
|
}
|
|
|
|
memcpy(mctx->block, data, len);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(md5_hmac_update);
|
|
|
|
/*! \fn void md5_hmac_final(struct crypto_tfm *tfm, u8 *out)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief compute final md5 hmac value
|
|
* \param tfm linux crypto algo transform
|
|
* \param out final md5 hmac output value
|
|
*/
|
|
static int md5_hmac_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
struct md5_hmac_ctx *mctx = crypto_shash_ctx(desc->tfm);
|
|
const unsigned int offset = mctx->byte_count & 0x3f;
|
|
char *p = (char *)mctx->block + offset;
|
|
int padding = 56 - (offset + 1);
|
|
volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START;
|
|
unsigned long flag;
|
|
int i = 0;
|
|
int dbn;
|
|
u32 *in = &temp[0];
|
|
|
|
|
|
*p++ = 0x80;
|
|
if (padding < 0) {
|
|
memset(p, 0x00, padding + sizeof (u64));
|
|
md5_hmac_transform(desc, mctx->block);
|
|
p = (char *)mctx->block;
|
|
padding = 56;
|
|
}
|
|
|
|
memset(p, 0, padding);
|
|
mctx->block[14] = endian_swap((mctx->byte_count + 64) << 3); // need to add 512 bit of the IPAD operation
|
|
mctx->block[15] = 0x00000000;
|
|
|
|
md5_hmac_transform(desc, mctx->block);
|
|
|
|
CRTCL_SECT_START;
|
|
|
|
//printk("\ndbn = %d\n", mctx->dbn);
|
|
hashs->DBN = mctx->dbn;
|
|
asm("sync");
|
|
|
|
*IFX_HASH_CON = 0x0703002D; //khs, go, init, ndc, endi, kyue, hmen, md5
|
|
|
|
//wait for processing
|
|
while (hashs->controlr.BSY) {
|
|
// this will not take long
|
|
}
|
|
|
|
for (dbn = 0; dbn < mctx->dbn; dbn++)
|
|
{
|
|
for (i = 0; i < 16; i++) {
|
|
hashs->MR = in[i];
|
|
};
|
|
|
|
hashs->controlr.GO = 1;
|
|
asm("sync");
|
|
|
|
//wait for processing
|
|
while (hashs->controlr.BSY) {
|
|
// this will not take long
|
|
}
|
|
|
|
in += 16;
|
|
}
|
|
|
|
|
|
#if 1
|
|
//wait for digest ready
|
|
while (! hashs->controlr.DGRY) {
|
|
// this will not take long
|
|
}
|
|
#endif
|
|
|
|
*((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;
|
|
|
|
/* reset the context after we finish with the hash */
|
|
mctx->byte_count = 0;
|
|
memset(&mctx->hash[0], 0, sizeof(MD5_HASH_WORDS));
|
|
memset(&mctx->block[0], 0, sizeof(MD5_BLOCK_WORDS));
|
|
memset(&temp[0], 0, MD5_HMAC_DBN_TEMP_SIZE);
|
|
|
|
CRTCL_SECT_END;
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(md5_hmac_final);
|
|
|
|
/*
|
|
* \brief MD5_HMAC function mappings
|
|
*/
|
|
|
|
static struct shash_alg ifxdeu_md5_hmac_alg = {
|
|
.digestsize = MD5_DIGEST_SIZE,
|
|
.init = md5_hmac_init,
|
|
.update = md5_hmac_update,
|
|
.final = md5_hmac_final,
|
|
.setkey = md5_hmac_setkey,
|
|
.descsize = sizeof(struct md5_hmac_ctx),
|
|
.base = {
|
|
.cra_name = "hmac(md5)",
|
|
.cra_driver_name= "ifxdeu-md5_hmac",
|
|
.cra_priority = 400,
|
|
.cra_ctxsize = sizeof(struct md5_hmac_ctx),
|
|
.cra_flags = CRYPTO_ALG_TYPE_HASH,
|
|
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
|
|
.cra_module = THIS_MODULE,
|
|
}
|
|
};
|
|
|
|
/*! \fn int ifxdeu_init_md5_hmac (void)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief initialize md5 hmac driver
|
|
*/
|
|
int ifxdeu_init_md5_hmac (void)
|
|
{
|
|
|
|
int ret = -ENOSYS;
|
|
|
|
|
|
if ((ret = crypto_register_shash(&ifxdeu_md5_hmac_alg)))
|
|
goto md5_hmac_err;
|
|
|
|
CRTCL_SECT_INIT;
|
|
|
|
printk (KERN_NOTICE "IFX DEU MD5_HMAC initialized%s.\n", disable_deudma ? "" : " (DMA)");
|
|
return ret;
|
|
|
|
md5_hmac_err:
|
|
printk(KERN_ERR "IFX DEU MD5_HMAC initialization failed!\n");
|
|
return ret;
|
|
}
|
|
|
|
/** \fn void ifxdeu_fini_md5_hmac (void)
|
|
* \ingroup IFX_MD5_HMAC_FUNCTIONS
|
|
* \brief unregister md5 hmac driver
|
|
*/
|
|
void ifxdeu_fini_md5_hmac (void)
|
|
{
|
|
crypto_unregister_shash(&ifxdeu_md5_hmac_alg);
|
|
}
|
|
|
|
|