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006fee0dad
The processing in the hmac algorithms depends on the status fields: count, dbn and started. Not all were initialised in the init method and after finishing the final method. Added missing fields to init method and call init method after finishing final. The memsets have the wrong size in the original driver and did not clear everything and are not necessary. Since no memset is done in the kernels generic implementation, memsets were removed. Signed-off-by: Daniel Kestrel <kestrel1974@t-online.de>
449 lines
13 KiB
C
449 lines
13 KiB
C
/******************************************************************************
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**
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** FILE NAME : ifxmips_sha1_hmac.c
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** PROJECT : IFX UEIP
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** MODULES : DEU Module for UEIP
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** DATE : September 8, 2009
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** AUTHOR : Mohammad Firdaus
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** DESCRIPTION : Data Encryption Unit Driver
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** COPYRIGHT : Copyright (c) 2009
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** Infineon Technologies AG
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** Am Campeon 1-12, 85579 Neubiberg, Germany
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** HISTORY
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** $Date $Author $Comment
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** 08,Sept 2009 Mohammad Firdaus Initial UEIP release
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** 21,March 2011 Mohammad Firdaus Changes for Kernel 2.6.32 and IPSec integration
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*******************************************************************************/
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/*!
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\defgroup IFX_DEU IFX_DEU_DRIVERS
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\ingroup API
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\brief ifx deu driver module
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*/
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/*!
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\file ifxmips_sha1_hmac.c
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\ingroup IFX_DEU
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\brief SHA1-HMAC deu driver file
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*/
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/*!
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\defgroup IFX_SHA1_HMAC_FUNCTIONS IFX_SHA1_HMAC_FUNCTIONS
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\ingroup IFX_DEU
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\brief ifx sha1 hmac functions
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*/
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/* Project header */
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/crypto.h>
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#include <crypto/internal/hash.h>
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#include <crypto/sha.h>
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#include <linux/types.h>
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#include <linux/scatterlist.h>
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#include <asm/byteorder.h>
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#include <linux/delay.h>
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#if defined(CONFIG_AR9)
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#include "ifxmips_deu_ar9.h"
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#elif defined(CONFIG_VR9) || defined(CONFIG_AR10)
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#include "ifxmips_deu_vr9.h"
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#else
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#error "Plaform Unknwon!"
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#endif
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#define SHA1_DIGEST_SIZE 20
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#define SHA1_BLOCK_WORDS 16
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#define SHA1_HASH_WORDS 5
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#define SHA1_HMAC_BLOCK_SIZE 64
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#define SHA1_HMAC_DBN_TEMP_SIZE 1024 // size in dword, needed for dbn workaround
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#define HASH_START IFX_HASH_CON
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#define SHA1_HMAC_MAX_KEYLEN 64
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#ifdef CRYPTO_DEBUG
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extern char debug_level;
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#define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args);
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#else
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#define DPRINTF(level, format, args...)
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#endif
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struct sha1_hmac_ctx {
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int keylen;
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u8 buffer[SHA1_HMAC_BLOCK_SIZE];
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u8 key[SHA1_HMAC_MAX_KEYLEN];
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u32 hash[SHA1_HASH_WORDS];
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u32 dbn;
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int started;
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u64 count;
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struct shash_desc *desc;
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u32 (*temp)[SHA1_BLOCK_WORDS];
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};
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extern int disable_deudma;
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static int sha1_hmac_final_impl(struct shash_desc *desc, u8 *out, bool hash_final);
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/*! \fn static void sha1_hmac_transform(struct crypto_tfm *tfm, u32 const *in)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief save input block to context
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* \param tfm linux crypto algo transform
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* \param in 64-byte block of input
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*/
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static int sha1_hmac_transform(struct shash_desc *desc, u32 const *in)
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{
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struct sha1_hmac_ctx *sctx = crypto_shash_ctx(desc->tfm);
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if ( ((sctx->dbn<<4)+1) > SHA1_HMAC_DBN_TEMP_SIZE )
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{
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//printk("SHA1_HMAC_DBN_TEMP_SIZE exceeded\n");
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sha1_hmac_final_impl(desc, (u8 *)sctx->hash, false);
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}
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memcpy(&sctx->temp[sctx->dbn], in, 64); //dbn workaround
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sctx->dbn += 1;
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return 0;
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}
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/*! \fn int sha1_hmac_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief sets sha1 hmac key
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* \param tfm linux crypto algo transform
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* \param key input key
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* \param keylen key length greater than 64 bytes IS NOT SUPPORTED
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*/
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static int sha1_hmac_setkey(struct crypto_shash *tfm, const u8 *key, unsigned int keylen)
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{
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struct sha1_hmac_ctx *sctx = crypto_shash_ctx(tfm);
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int err;
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if (keylen > SHA1_HMAC_MAX_KEYLEN) {
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char *hash_alg_name = "sha1";
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sctx->desc->tfm = crypto_alloc_shash(hash_alg_name, 0, 0);
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if (IS_ERR(sctx->desc->tfm)) return PTR_ERR(sctx->desc->tfm);
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memset(sctx->key, 0, SHA1_HMAC_MAX_KEYLEN);
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err = crypto_shash_digest(sctx->desc, key, keylen, sctx->key);
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if (err) return err;
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sctx->keylen = SHA1_DIGEST_SIZE;
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crypto_free_shash(sctx->desc->tfm);
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} else {
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memcpy(sctx->key, key, keylen);
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sctx->keylen = keylen;
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}
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memset(sctx->key + sctx->keylen, 0, SHA1_HMAC_MAX_KEYLEN - sctx->keylen);
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//printk("Setting keys of len: %d\n", keylen);
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return 0;
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}
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/*! \fn int sha1_hmac_setkey_hw(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief sets sha1 hmac key into hw registers
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* \param tfm linux crypto algo transform
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* \param key input key
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* \param keylen key length greater than 64 bytes IS NOT SUPPORTED
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*/
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static int sha1_hmac_setkey_hw(const u8 *key, unsigned int keylen)
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{
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volatile struct deu_hash_t *hash = (struct deu_hash_t *) HASH_START;
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int i, j;
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u32 *in_key = (u32 *)key;
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j = 0;
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hash->KIDX |= 0x80000000; //reset keys back to 0
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for (i = 0; i < keylen; i+=4)
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{
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hash->KIDX = j;
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asm("sync");
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hash->KEY = *((u32 *) in_key + j);
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j++;
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}
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return 0;
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}
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/*! \fn void sha1_hmac_init(struct crypto_tfm *tfm)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief initialize sha1 hmac context
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* \param tfm linux crypto algo transform
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*/
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static int sha1_hmac_init(struct shash_desc *desc)
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{
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struct sha1_hmac_ctx *sctx = crypto_shash_ctx(desc->tfm);
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//printk("debug ln: %d, fn: %s\n", __LINE__, __func__);
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sctx->dbn = 0; //dbn workaround
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sctx->started = 0;
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sctx->count = 0;
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return 0;
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}
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/*! \fn static void sha1_hmac_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief on-the-fly sha1 hmac computation
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* \param tfm linux crypto algo transform
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* \param data input data
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* \param len size of input data
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*/
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static int sha1_hmac_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct sha1_hmac_ctx *sctx = crypto_shash_ctx(desc->tfm);
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unsigned int i, j;
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j = (sctx->count >> 3) & 0x3f;
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sctx->count += len << 3;
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// printk("sctx->count = %d\n", sctx->count);
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if ((j + len) > 63) {
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memcpy (&sctx->buffer[j], data, (i = 64 - j));
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sha1_hmac_transform (desc, (const u32 *)sctx->buffer);
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for (; i + 63 < len; i += 64) {
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sha1_hmac_transform (desc, (const u32 *)&data[i]);
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}
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j = 0;
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}
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else
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i = 0;
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memcpy (&sctx->buffer[j], &data[i], len - i);
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return 0;
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}
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/*! \fn static int sha1_hmac_final(struct crypto_tfm *tfm, u8 *out)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief call sha1_hmac_final_impl with hash_final true
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* \param tfm linux crypto algo transform
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* \param out final sha1 hmac output value
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*/
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static int sha1_hmac_final(struct shash_desc *desc, u8 *out)
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{
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return sha1_hmac_final_impl(desc, out, true);
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}
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/*! \fn static int sha1_hmac_final_impl(struct crypto_tfm *tfm, u8 *out, bool hash_final)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief ompute final or intermediate sha1 hmac value
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* \param tfm linux crypto algo transform
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* \param out final sha1 hmac output value
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* \param in finalize or intermediate processing
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*/
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static int sha1_hmac_final_impl(struct shash_desc *desc, u8 *out, bool hash_final)
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{
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struct sha1_hmac_ctx *sctx = crypto_shash_ctx(desc->tfm);
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u32 index, padlen;
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u64 t;
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u8 bits[8] = { 0, };
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static const u8 padding[64] = { 0x80, };
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volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START;
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unsigned long flag;
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int i = 0;
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int dbn;
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u32 *in = sctx->temp[0];
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if (hash_final) {
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t = sctx->count + 512; // need to add 512 bit of the IPAD operation
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bits[7] = 0xff & t;
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t >>= 8;
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bits[6] = 0xff & t;
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t >>= 8;
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bits[5] = 0xff & t;
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t >>= 8;
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bits[4] = 0xff & t;
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t >>= 8;
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bits[3] = 0xff & t;
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t >>= 8;
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bits[2] = 0xff & t;
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t >>= 8;
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bits[1] = 0xff & t;
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t >>= 8;
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bits[0] = 0xff & t;
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/* Pad out to 56 mod 64 */
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index = (sctx->count >> 3) & 0x3f;
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padlen = (index < 56) ? (56 - index) : ((64 + 56) - index);
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sha1_hmac_update (desc, padding, padlen);
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/* Append length */
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sha1_hmac_update (desc, bits, sizeof bits);
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}
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CRTCL_SECT_HASH_START;
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SHA_HASH_INIT;
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sha1_hmac_setkey_hw(sctx->key, sctx->keylen);
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if (hash_final) {
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hashs->DBN = sctx->dbn;
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} else {
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hashs->DBN = sctx->dbn + 5;
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}
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asm("sync");
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//for vr9 change, ENDI = 1
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*IFX_HASH_CON = HASH_CON_VALUE;
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//wait for processing
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while (hashs->controlr.BSY) {
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// this will not take long
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}
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if (sctx->started) {
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hashs->D1R = *((u32 *) sctx->hash + 0);
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hashs->D2R = *((u32 *) sctx->hash + 1);
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hashs->D3R = *((u32 *) sctx->hash + 2);
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hashs->D4R = *((u32 *) sctx->hash + 3);
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hashs->D5R = *((u32 *) sctx->hash + 4);
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} else {
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sctx->started = 1;
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}
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for (dbn = 0; dbn < sctx->dbn; dbn++)
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{
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for (i = 0; i < 16; i++) {
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hashs->MR = in[i];
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};
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hashs->controlr.GO = 1;
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asm("sync");
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//wait for processing
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while (hashs->controlr.BSY) {
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// this will not take long
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}
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in += 16;
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}
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#if 1
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if (hash_final) {
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//wait for digest ready
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while (! hashs->controlr.DGRY) {
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// this will not take long
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}
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}
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#endif
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*((u32 *) out + 0) = hashs->D1R;
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*((u32 *) out + 1) = hashs->D2R;
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*((u32 *) out + 2) = hashs->D3R;
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*((u32 *) out + 3) = hashs->D4R;
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*((u32 *) out + 4) = hashs->D5R;
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CRTCL_SECT_HASH_END;
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if (hash_final) {
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sha1_hmac_init(desc);
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} else {
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sctx->dbn = 0;
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}
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//printk("debug ln: %d, fn: %s\n", __LINE__, __func__);
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return 0;
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}
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/*! \fn void sha1_hmac_init_tfm(struct crypto_tfm *tfm)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief initialize pointers in sha1_hmac_ctx
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* \param tfm linux crypto algo transform
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*/
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static int sha1_hmac_init_tfm(struct crypto_tfm *tfm)
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{
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struct sha1_hmac_ctx *sctx = crypto_tfm_ctx(tfm);
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sctx->temp = kzalloc(4 * SHA1_HMAC_DBN_TEMP_SIZE, GFP_KERNEL);
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if (IS_ERR(sctx->temp)) return PTR_ERR(sctx->temp);
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sctx->desc = kzalloc(sizeof(struct shash_desc), GFP_KERNEL);
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if (IS_ERR(sctx->desc)) return PTR_ERR(sctx->desc);
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return 0;
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}
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/*! \fn void sha1_hmac_exit_tfm(struct crypto_tfm *tfm)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief free pointers in sha1_hmac_ctx
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* \param tfm linux crypto algo transform
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*/
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static void sha1_hmac_exit_tfm(struct crypto_tfm *tfm)
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{
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struct sha1_hmac_ctx *sctx = crypto_tfm_ctx(tfm);
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kfree(sctx->temp);
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kfree(sctx->desc);
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}
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/*
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* \brief SHA1_HMAC function mappings
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*/
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static struct shash_alg ifxdeu_sha1_hmac_alg = {
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.digestsize = SHA1_DIGEST_SIZE,
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.init = sha1_hmac_init,
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.update = sha1_hmac_update,
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.final = sha1_hmac_final,
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.setkey = sha1_hmac_setkey,
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.descsize = sizeof(struct sha1_hmac_ctx),
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.base = {
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.cra_name = "hmac(sha1)",
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.cra_driver_name= "ifxdeu-sha1_hmac",
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.cra_priority = 400,
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.cra_ctxsize = sizeof(struct sha1_hmac_ctx),
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.cra_flags = CRYPTO_ALG_TYPE_HASH | CRYPTO_ALG_KERN_DRIVER_ONLY,
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.cra_blocksize = SHA1_HMAC_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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.cra_init = sha1_hmac_init_tfm,
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.cra_exit = sha1_hmac_exit_tfm,
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}
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};
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/*! \fn int ifxdeu_init_sha1_hmac (void)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief initialize sha1 hmac driver
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*/
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int ifxdeu_init_sha1_hmac (void)
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{
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int ret = -ENOSYS;
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if ((ret = crypto_register_shash(&ifxdeu_sha1_hmac_alg)))
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goto sha1_err;
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printk (KERN_NOTICE "IFX DEU SHA1_HMAC initialized%s.\n", disable_deudma ? "" : " (DMA)");
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return ret;
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sha1_err:
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printk(KERN_ERR "IFX DEU SHA1_HMAC initialization failed!\n");
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return ret;
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}
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/*! \fn void ifxdeu_fini_sha1_hmac (void)
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* \ingroup IFX_SHA1_HMAC_FUNCTIONS
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* \brief unregister sha1 hmac driver
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*/
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void ifxdeu_fini_sha1_hmac (void)
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{
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crypto_unregister_shash(&ifxdeu_sha1_hmac_alg);
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}
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