diff options
Diffstat (limited to 'target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_arc4.c')
| -rwxr-xr-x | target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_arc4.c | 388 |
1 files changed, 0 insertions, 388 deletions
diff --git a/target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_arc4.c b/target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_arc4.c deleted file mode 100755 index b33a19de95..0000000000 --- a/target/linux/ifxmips/files/drivers/crypto/ifxmips/ifxmips_arc4.c +++ /dev/null @@ -1,388 +0,0 @@ -/* - * 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_arc4.c - \ingroup IFX_DEU - \brief ARC4 encryption DEU driver file -*/ - -/*! - \defgroup IFX_ARC4_FUNCTIONS IFX_ARC4_FUNCTIONS - \ingroup IFX_DEU - \brief IFX deu driver functions -*/ - -/* Project header */ -#include <linux/version.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/crypto.h> -#include <crypto/algapi.h> -#include <linux/interrupt.h> -#include <asm/byteorder.h> -#include <linux/delay.h> -#include "ifxmips_deu.h" - -#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_DMA - -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) - -/* Preprocessor declerations */ -#define ARC4_MIN_KEY_SIZE 1 -//#define ARC4_MAX_KEY_SIZE 256 -#define ARC4_MAX_KEY_SIZE 16 -#define ARC4_BLOCK_SIZE 1 -#define ARC4_START IFX_ARC4_CON - -/* - * \brief arc4 private structure -*/ -struct arc4_ctx { - int key_length; - u8 buf[120]; -}; - -extern int disable_deudma; - -/*! \fn static void _deu_arc4 (void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) - \ingroup IFX_ARC4_FUNCTIONS - \brief main interface to AES hardware - \param ctx_arg crypto algo context - \param out_arg output bytestream - \param in_arg input bytestream - \param iv_arg initialization vector - \param nbytes length of bytestream - \param encdec 1 for encrypt; 0 for decrypt - \param mode operation mode such as ebc, cbc, ctr -*/ -static void _deu_arc4 (void *ctx_arg, u8 *out_arg, const u8 *in_arg, - u8 *iv_arg, u32 nbytes, int encdec, int mode) -{ - volatile struct arc4_t *arc4 = (struct arc4_t *) ARC4_START; - int i = 0; - ulong flag; - -#if 1 // need to handle nbytes not multiple of 16 - volatile u32 tmp_array32[4]; - volatile u8 *tmp_ptr8; - int remaining_bytes, j; -#endif - - CRTCL_SECT_START; - - arc4->IDLEN = nbytes; - -#if 1 - while (i < nbytes) { - arc4->ID3R = *((u32 *) in_arg + (i>>2) + 0); - arc4->ID2R = *((u32 *) in_arg + (i>>2) + 1); - arc4->ID1R = *((u32 *) in_arg + (i>>2) + 2); - arc4->ID0R = *((u32 *) in_arg + (i>>2) + 3); - - arc4->controlr.GO = 1; - - while (arc4->controlr.BUS) { - // this will not take long - } - -#if 1 - // need to handle nbytes not multiple of 16 - tmp_array32[0] = arc4->OD3R; - tmp_array32[1] = arc4->OD2R; - tmp_array32[2] = arc4->OD1R; - tmp_array32[3] = arc4->OD0R; - - remaining_bytes = nbytes - i; - if (remaining_bytes > 16) - remaining_bytes = 16; - - tmp_ptr8 = (u8 *)&tmp_array32[0]; - for (j = 0; j < remaining_bytes; j++) - *out_arg++ = *tmp_ptr8++; -#else - *((u32 *) out_arg + (i>>2) + 0) = arc4->OD3R; - *((u32 *) out_arg + (i>>2) + 1) = arc4->OD2R; - *((u32 *) out_arg + (i>>2) + 2) = arc4->OD1R; - *((u32 *) out_arg + (i>>2) + 3) = arc4->OD0R; -#endif - - i += 16; - } -#else // dma - - -#endif // dma - - CRTCL_SECT_END; -} - -/*! \fn arc4_chip_init (void) - \ingroup IFX_ARC4_FUNCTIONS - \brief initialize arc4 hardware -*/ -static void arc4_chip_init (void) -{ - //do nothing -} - -/*! \fn static int arc4_set_key(struct crypto_tfm *tfm, const u8 *in_key, unsigned int key_len) - \ingroup IFX_ARC4_FUNCTIONS - \brief sets ARC4 key - \param tfm linux crypto algo transform - \param in_key input key - \param key_len key lengths less than or equal to 16 bytes supported -*/ -static int arc4_set_key(struct crypto_tfm *tfm, const u8 *inkey, - unsigned int key_len) -{ - //struct arc4_ctx *ctx = crypto_tfm_ctx(tfm); - volatile struct arc4_t *arc4 = (struct arc4_t *) ARC4_START; - - u32 *in_key = (u32 *)inkey; - - // must program all bits at one go?!!! -#if 1 -//#ifndef CONFIG_CRYPTO_DEV_VR9_DMA - *IFX_ARC4_CON = ( (1<<31) | ((key_len - 1)<<27) | (1<<26) | (3<<16) ); - //NDC=1,ENDI=1,GO=0,KSAE=1,SM=0 - - arc4->K3R = *((u32 *) in_key + 0); - arc4->K2R = *((u32 *) in_key + 1); - arc4->K1R = *((u32 *) in_key + 2); - arc4->K0R = *((u32 *) in_key + 3); -#else //dma - *AMAZONS_ARC4_CON = ( (1<<31) | ((key_len - 1)<<27) | (1<<26) | (3<<16) | (1<<4) ); - //NDC=1,ENDI=1,GO=0,KSAE=1,SM=1 - - arc4->K3R = *((u32 *) in_key + 0); - arc4->K2R = *((u32 *) in_key + 1); - arc4->K1R = *((u32 *) in_key + 2); - arc4->K0R = *((u32 *) in_key + 3); - -#if 0 - arc4->K3R = endian_swap(*((u32 *) in_key + 0)); - arc4->K2R = endian_swap(*((u32 *) in_key + 1)); - arc4->K1R = endian_swap(*((u32 *) in_key + 2)); - arc4->K0R = endian_swap(*((u32 *) in_key + 3)); -#endif - -#endif - -#if 0 // arc4 is a ugly state machine, KSAE can only be set once per session - ctx->key_length = key_len; - - memcpy ((u8 *) (ctx->buf), in_key, key_len); -#endif - - return 0; -} - -/*! \fn static void _deu_arc4_ecb(void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) - \ingroup IFX_ARC4_FUNCTIONS - \brief sets ARC4 hardware to ECB mode - \param ctx crypto algo context - \param dst output bytestream - \param src input bytestream - \param iv initialization vector - \param nbytes length of bytestream - \param encdec 1 for encrypt; 0 for decrypt - \param inplace not used -*/ -static void _deu_arc4_ecb(void *ctx, uint8_t *dst, const uint8_t *src, - uint8_t *iv, size_t nbytes, int encdec, int inplace) -{ - _deu_arc4 (ctx, dst, src, NULL, nbytes, encdec, 0); -} - -/*! \fn static void arc4_crypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) - \ingroup IFX_ARC4_FUNCTIONS - \brief encrypt/decrypt ARC4_BLOCK_SIZE of data - \param tfm linux crypto algo transform - \param out output bytestream - \param in input bytestream -*/ -static void arc4_crypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) -{ - struct arc4_ctx *ctx = crypto_tfm_ctx(tfm); - - _deu_arc4 (ctx, out, in, NULL, ARC4_BLOCK_SIZE, - CRYPTO_DIR_DECRYPT, CRYPTO_TFM_MODE_ECB); - -} - -/* - * \brief ARC4 function mappings -*/ -static struct crypto_alg ifxdeu_arc4_alg = { - .cra_name = "arc4", - .cra_driver_name = "ifxdeu-arc4", - .cra_flags = CRYPTO_ALG_TYPE_CIPHER, - .cra_blocksize = ARC4_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct arc4_ctx), - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_arc4_alg.cra_list), - .cra_u = { - .cipher = { - .cia_min_keysize = ARC4_MIN_KEY_SIZE, - .cia_max_keysize = ARC4_MAX_KEY_SIZE, - .cia_setkey = arc4_set_key, - .cia_encrypt = arc4_crypt, - .cia_decrypt = arc4_crypt, - } - } -}; - -/*! \fn static int ecb_arc4_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - \ingroup IFX_ARC4_FUNCTIONS - \brief ECB ARC4 encrypt using linux crypto blkcipher - \param desc blkcipher descriptor - \param dst output scatterlist - \param src input scatterlist - \param nbytes data size in bytes -*/ -static int ecb_arc4_encrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct arc4_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - DPRINTF(1, "\n"); - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - _deu_arc4_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, - NULL, nbytes, CRYPTO_DIR_ENCRYPT, 0); - nbytes &= ARC4_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/*! \fn static int ecb_arc4_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - \ingroup IFX_ARC4_FUNCTIONS - \brief ECB ARC4 decrypt using linux crypto blkcipher - \param desc blkcipher descriptor - \param dst output scatterlist - \param src input scatterlist - \param nbytes data size in bytes -*/ -static int ecb_arc4_decrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct arc4_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - DPRINTF(1, "\n"); - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - _deu_arc4_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, - NULL, nbytes, CRYPTO_DIR_DECRYPT, 0); - nbytes &= ARC4_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/* - * \brief ARC4 function mappings -*/ -static struct crypto_alg ifxdeu_ecb_arc4_alg = { - .cra_name = "ecb(arc4)", - .cra_driver_name = "ifxdeu-ecb(arc4)", - .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, - .cra_blocksize = ARC4_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct arc4_ctx), - .cra_type = &crypto_blkcipher_type, - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_ecb_arc4_alg.cra_list), - .cra_u = { - .blkcipher = { - .min_keysize = ARC4_MIN_KEY_SIZE, - .max_keysize = ARC4_MAX_KEY_SIZE, - .setkey = arc4_set_key, - .encrypt = ecb_arc4_encrypt, - .decrypt = ecb_arc4_decrypt, - } - } -}; - -/*! \fn int __init ifxdeu_init_arc4(void) - \ingroup IFX_ARC4_FUNCTIONS - \brief initialize arc4 driver -*/ -int __init ifxdeu_init_arc4(void) -{ - int ret; - - if ((ret = crypto_register_alg(&ifxdeu_arc4_alg))) - goto arc4_err; - - if ((ret = crypto_register_alg(&ifxdeu_ecb_arc4_alg))) - goto ecb_arc4_err; - - arc4_chip_init (); - - CRTCL_SECT_INIT; - - printk (KERN_NOTICE "IFX DEU ARC4 initialized %s.\n", disable_deudma ? "" : " (DMA)"); - return ret; - -arc4_err: - crypto_unregister_alg(&ifxdeu_arc4_alg); - printk(KERN_ERR "IFX arc4 initialization failed!\n"); - return ret; -ecb_arc4_err: - crypto_unregister_alg(&ifxdeu_ecb_arc4_alg); - printk (KERN_ERR "IFX ecb_arc4 initialization failed!\n"); - return ret; - -} - -/*! \fn void __exit ifxdeu_fini_arc4(void) - \ingroup IFX_ARC4_FUNCTIONS - \brief unregister arc4 driver -*/ -void __exit ifxdeu_fini_arc4(void) -{ - crypto_unregister_alg (&ifxdeu_arc4_alg); - crypto_unregister_alg (&ifxdeu_ecb_arc4_alg); -} - -#endif |