diff options
Diffstat (limited to 'target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_md5.c')
| -rwxr-xr-x | target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_md5.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_md5.c b/target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_md5.c new file mode 100755 index 0000000..cd484ab --- /dev/null +++ b/target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_md5.c @@ -0,0 +1,264 @@ +/* + * 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.c + \ingroup IFX_DEU + \brief MD5 encryption deu driver file +*/ + +/*! + \defgroup IFX_MD5_FUNCTIONS IFX_MD5_FUNCTIONS + \ingroup IFX_DEU + \brief ifx deu MD5 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 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_ctx { + u32 hash[MD5_HASH_WORDS]; + u32 block[MD5_BLOCK_WORDS]; + u64 byte_count; +}; + +extern int disable_deudma; + +/*! \fn static u32 endian_swap(u32 input) + * \ingroup IFX_MD5_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_transform(u32 *hash, u32 const *in) + * \ingroup IFX_MD5_FUNCTIONS + * \brief main interface to md5 hardware + * \param hash current hash value + * \param in 64-byte block of input +*/ +static void md5_transform(u32 *hash, u32 const *in) +{ + int i; + volatile struct deu_hash_t *hashs = (struct deu_hash_t *) HASH_START; + ulong flag; + + CRTCL_SECT_START; + + for (i = 0; i < 16; i++) { + hashs->MR = endian_swap(in[i]); + }; + + //wait for processing + while (hashs->controlr.BSY) { + // this will not take long + } + + CRTCL_SECT_END; +} + +/*! \fn static inline void md5_transform_helper(struct md5_ctx *ctx) + * \ingroup IFX_MD5_FUNCTIONS + * \brief interfacing function for md5_transform() + * \param ctx crypto context +*/ +static inline void md5_transform_helper(struct md5_ctx *ctx) +{ + //le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32)); + md5_transform(ctx->hash, ctx->block); +} + +/*! \fn static void md5_init(struct crypto_tfm *tfm) + * \ingroup IFX_MD5_FUNCTIONS + * \brief initialize md5 hardware + * \param tfm linux crypto algo transform +*/ +static void md5_init(struct crypto_tfm *tfm) +{ + struct md5_ctx *mctx = crypto_tfm_ctx(tfm); + volatile struct deu_hash_t *hash = (struct deu_hash_t *) HASH_START; + + hash->controlr.SM = 1; + hash->controlr.ALGO = 1; // 1 = md5 0 = sha1 + hash->controlr.INIT = 1; // Initialize the hash operation by writing a '1' to the INIT bit. + + mctx->byte_count = 0; +} + +/*! \fn static void md5_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) + * \ingroup IFX_MD5_FUNCTIONS + * \brief on-the-fly md5 computation + * \param tfm linux crypto algo transform + * \param data input data + * \param len size of input data +*/ +static void md5_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) +{ + struct md5_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_transform_helper(mctx); + data += avail; + len -= avail; + + while (len >= sizeof(mctx->block)) { + memcpy(mctx->block, data, sizeof(mctx->block)); + md5_transform_helper(mctx); + data += sizeof(mctx->block); + len -= sizeof(mctx->block); + } + + memcpy(mctx->block, data, len); +} + +/*! \fn static void md5_final(struct crypto_tfm *tfm, u8 *out) + * \ingroup IFX_MD5_FUNCTIONS + * \brief compute final md5 value + * \param tfm linux crypto algo transform + * \param out final md5 output value +*/ +static void md5_final(struct crypto_tfm *tfm, u8 *out) +{ + struct md5_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; + + *p++ = 0x80; + if (padding < 0) { + memset(p, 0x00, padding + sizeof (u64)); + md5_transform_helper(mctx); + p = (char *)mctx->block; + padding = 56; + } + + memset(p, 0, padding); + mctx->block[14] = endian_swap(mctx->byte_count << 3); + mctx->block[15] = endian_swap(mctx->byte_count >> 29); + +#if 0 + le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - + sizeof(u64)) / sizeof(u32)); +#endif + + md5_transform(mctx->hash, mctx->block); + + CRTCL_SECT_START; + + *((u32 *) out + 0) = endian_swap (hashs->D1R); + *((u32 *) out + 1) = endian_swap (hashs->D2R); + *((u32 *) out + 2) = endian_swap (hashs->D3R); + *((u32 *) out + 3) = endian_swap (hashs->D4R); + + CRTCL_SECT_END; + + // Wipe context + memset(mctx, 0, sizeof(*mctx)); +} + +/* + * \brief MD5 function mappings +*/ +static struct crypto_alg ifxdeu_md5_alg = { + .cra_name = "md5", + .cra_driver_name = "ifxdeu-md5", + .cra_flags = CRYPTO_ALG_TYPE_DIGEST, + .cra_blocksize = MD5_HMAC_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct md5_ctx), + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(ifxdeu_md5_alg.cra_list), + .cra_u = { .digest = { + .dia_digestsize = MD5_DIGEST_SIZE, + .dia_init = md5_init, + .dia_update = md5_update, + .dia_final = md5_final } } +}; + +/*! \fn int __init ifxdeu_init_md5 (void) + * \ingroup IFX_MD5_FUNCTIONS + * \brief initialize md5 driver +*/ +int __init ifxdeu_init_md5 (void) +{ + int ret; + + if ((ret = crypto_register_alg(&ifxdeu_md5_alg))) + goto md5_err; + + CRTCL_SECT_INIT; + + printk (KERN_NOTICE "IFX DEU MD5 initialized%s.\n", disable_deudma ? "" : " (DMA)"); + return ret; + +md5_err: + printk(KERN_ERR "IFX DEU MD5 initialization failed!\n"); + return ret; +} + +/*! \fn void __exit ifxdeu_fini_md5 (void) + * \ingroup IFX_MD5_FUNCTIONS + * \brief unregister md5 driver +*/ + +void __exit ifxdeu_fini_md5 (void) +{ + crypto_unregister_alg (&ifxdeu_md5_alg); +} + |