diff options
Diffstat (limited to 'target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_md5_hmac.c')
-rwxr-xr-x | target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_md5_hmac.c | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_md5_hmac.c b/target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_md5_hmac.c new file mode 100755 index 0000000..fcd118e --- /dev/null +++ b/target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_md5_hmac.c @@ -0,0 +1,307 @@ +/* + * 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_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 <asm/byteorder.h> +#include "ifxmips_deu.h" + +#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) + +struct md5_hmac_ctx { + u32 hash[MD5_HASH_WORDS]; + u32 block[MD5_BLOCK_WORDS]; + u64 byte_count; + u32 dbn; + 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 crypto_tfm *tfm, u32 const *in) +{ + struct md5_hmac_ctx *mctx = crypto_tfm_ctx(tfm); + + memcpy(&mctx->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 +*/ +int md5_hmac_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) +{ + volatile struct deu_hash_t *hash = (struct deu_hash_t *) HASH_START; + int i, j; + u32 *in_key = (u32 *)key; + + hash->KIDX = 0x80000000; // reset all 16 words of the key to '0' + asm("sync"); + + j = 0; + for (i = 0; i < keylen; i+=4) + { + hash->KIDX = j; + asm("sync"); + hash->KEY = *((u32 *) in_key + j); + j++; + } + + 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 +*/ +void md5_hmac_init(struct crypto_tfm *tfm) +{ + struct md5_hmac_ctx *mctx = crypto_tfm_ctx(tfm); + + memset(mctx, 0, sizeof(struct md5_hmac_ctx)); + mctx->dbn = 0; //dbn workaround +} + +/*! \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 +*/ +void md5_hmac_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) +{ + struct md5_hmac_ctx *mctx = crypto_tfm_ctx(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; + } + + memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), + data, avail); + + md5_hmac_transform(tfm, mctx->block); + data += avail; + len -= avail; + + while (len >= sizeof(mctx->block)) { + memcpy(mctx->block, data, sizeof(mctx->block)); + md5_hmac_transform(tfm, mctx->block); + data += sizeof(mctx->block); + len -= sizeof(mctx->block); + } + + memcpy(mctx->block, data, len); + +} + +/*! \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 +*/ +void md5_hmac_final(struct crypto_tfm *tfm, u8 *out) +{ + struct md5_hmac_ctx *mctx = crypto_tfm_ctx(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; + u32 flag; + int i = 0; + int dbn; + u32 *in = &mctx->temp[0]; + + *p++ = 0x80; + if (padding < 0) { + memset(p, 0x00, padding + sizeof (u64)); + md5_hmac_transform(tfm, 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(tfm, mctx->block); + + CRTCL_SECT_START; + + printk("dbn = %d\n", mctx->dbn); + hashs->DBN = mctx->dbn; + + *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; + + CRTCL_SECT_END; +} + +/* + * \brief MD5_HMAC function mappings +*/ + +static struct crypto_alg ifxdeu_md5_hmac_alg = { + .cra_name = "hmac(md5)", + .cra_driver_name = "ifxdeu-md5_hmac", + .cra_flags = CRYPTO_ALG_TYPE_DIGEST, + .cra_blocksize = MD5_HMAC_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct md5_hmac_ctx), + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(ifxdeu_md5_hmac_alg.cra_list), + .cra_u = { .digest = { + .dia_digestsize = MD5_DIGEST_SIZE, + .dia_setkey = md5_hmac_setkey, + .dia_init = md5_hmac_init, + .dia_update = md5_hmac_update, + .dia_final = md5_hmac_final } } +}; + +/*! \fn int __init ifxdeu_init_md5_hmac (void) + * \ingroup IFX_MD5_HMAC_FUNCTIONS + * \brief initialize md5 hmac driver +*/ +int __init ifxdeu_init_md5_hmac (void) +{ + int ret; + + if ((ret = crypto_register_alg(&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 __exit ifxdeu_fini_md5_hmac (void) + * \ingroup IFX_MD5_HMAC_FUNCTIONS + * \brief unregister md5 hmac driver +*/ +void __exit ifxdeu_fini_md5_hmac (void) +{ + crypto_unregister_alg (&ifxdeu_md5_hmac_alg); +} + |