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Diffstat (limited to 'package/platform/lantiq/ltq-deu/src/ifxmips_aes.c')
| -rw-r--r-- | package/platform/lantiq/ltq-deu/src/ifxmips_aes.c | 904 |
1 files changed, 0 insertions, 904 deletions
diff --git a/package/platform/lantiq/ltq-deu/src/ifxmips_aes.c b/package/platform/lantiq/ltq-deu/src/ifxmips_aes.c deleted file mode 100644 index bf77537940..0000000000 --- a/package/platform/lantiq/ltq-deu/src/ifxmips_aes.c +++ /dev/null @@ -1,904 +0,0 @@ -/****************************************************************************** -** -** FILE NAME : ifxmips_aes.c -** PROJECT : IFX UEIP -** MODULES : DEU Module -** -** DATE : September 8, 2009 -** AUTHOR : Mohammad Firdaus -** DESCRIPTION : Data Encryption Unit Driver for AES Algorithm -** 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 -*******************************************************************************/ -/*! - \defgroup IFX_DEU IFX_DEU_DRIVERS - \ingroup API - \brief ifx DEU driver module -*/ - -/*! - \file ifxmips_aes.c - \ingroup IFX_DEU - \brief AES Encryption Driver main file -*/ - -/*! - \defgroup IFX_AES_FUNCTIONS IFX_AES_FUNCTIONS - \ingroup IFX_DEU - \brief IFX AES driver Functions -*/ - - -/* Project Header Files */ -#if defined(CONFIG_MODVERSIONS) -#define MODVERSIONS -#include <linux/modeversions> -#endif - -#include <linux/version.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/proc_fs.h> -#include <linux/fs.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/crypto.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <asm/byteorder.h> -#include <crypto/algapi.h> - -#include "ifxmips_deu.h" - -#if defined(CONFIG_DANUBE) -#include "ifxmips_deu_danube.h" -extern int ifx_danube_pre_1_4; -#elif defined(CONFIG_AR9) -#include "ifxmips_deu_ar9.h" -#elif defined(CONFIG_VR9) || defined(CONFIG_AR10) -#include "ifxmips_deu_vr9.h" -#else -#error "Unkown platform" -#endif - -/* DMA related header and variables */ - -spinlock_t aes_lock; -#define CRTCL_SECT_INIT spin_lock_init(&aes_lock) -#define CRTCL_SECT_START spin_lock_irqsave(&aes_lock, flag) -#define CRTCL_SECT_END spin_unlock_irqrestore(&aes_lock, flag) - -/* Definition of constants */ -#define AES_START IFX_AES_CON -#define AES_MIN_KEY_SIZE 16 -#define AES_MAX_KEY_SIZE 32 -#define AES_BLOCK_SIZE 16 -#define CTR_RFC3686_NONCE_SIZE 4 -#define CTR_RFC3686_IV_SIZE 8 -#define CTR_RFC3686_MAX_KEY_SIZE (AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE) - -#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 /* CRYPTO_DEBUG */ - -/* Function decleration */ -int aes_chip_init(void); -u32 endian_swap(u32 input); -u32 input_swap(u32 input); -u32* memory_alignment(const u8 *arg, u32 *buff_alloc, int in_out, int nbytes); -void aes_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); -void des_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); -int aes_memory_allocate(int value); -int des_memory_allocate(int value); -void memory_release(u32 *addr); - - -extern void ifx_deu_aes (void *ctx_arg, uint8_t *out_arg, const uint8_t *in_arg, - uint8_t *iv_arg, size_t nbytes, int encdec, int mode); -/* End of function decleration */ - -struct aes_ctx { - int key_length; - u32 buf[AES_MAX_KEY_SIZE]; - u8 nonce[CTR_RFC3686_NONCE_SIZE]; -}; - -extern int disable_deudma; -extern int disable_multiblock; - -/*! \fn int aes_set_key (struct crypto_tfm *tfm, const uint8_t *in_key, unsigned int key_len) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets the AES keys - * \param tfm linux crypto algo transform - * \param in_key input key - * \param key_len key lengths of 16, 24 and 32 bytes supported - * \return -EINVAL - bad key length, 0 - SUCCESS -*/ -int aes_set_key (struct crypto_tfm *tfm, const u8 *in_key, unsigned int key_len) -{ - struct aes_ctx *ctx = crypto_tfm_ctx(tfm); - unsigned long *flags = (unsigned long *) &tfm->crt_flags; - - //printk("set_key in %s\n", __FILE__); - - //aes_chip_init(); - - if (key_len != 16 && key_len != 24 && key_len != 32) { - *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; - return -EINVAL; - } - - ctx->key_length = key_len; - DPRINTF(0, "ctx @%p, key_len %d, ctx->key_length %d\n", ctx, key_len, ctx->key_length); - memcpy ((u8 *) (ctx->buf), in_key, key_len); - - return 0; -} - - -/*! \fn void ifx_deu_aes (void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, size_t nbytes, int encdec, int mode) - * \ingroup IFX_AES_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 - * -*/ -void ifx_deu_aes (void *ctx_arg, u8 *out_arg, const u8 *in_arg, - u8 *iv_arg, size_t nbytes, int encdec, int mode) - -{ - /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - volatile struct aes_t *aes = (volatile struct aes_t *) AES_START; - struct aes_ctx *ctx = (struct aes_ctx *)ctx_arg; - u32 *in_key = ctx->buf; - unsigned long flag; - /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - int key_len = ctx->key_length; - - int i = 0; - int byte_cnt = nbytes; - - - CRTCL_SECT_START; - /* 128, 192 or 256 bit key length */ - aes->controlr.K = key_len / 8 - 2; - if (key_len == 128 / 8) { - aes->K3R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 0)); - aes->K2R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 1)); - aes->K1R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 2)); - aes->K0R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 3)); - } - else if (key_len == 192 / 8) { - aes->K5R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 0)); - aes->K4R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 1)); - aes->K3R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 2)); - aes->K2R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 3)); - aes->K1R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 4)); - aes->K0R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 5)); - } - else if (key_len == 256 / 8) { - aes->K7R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 0)); - aes->K6R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 1)); - aes->K5R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 2)); - aes->K4R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 3)); - aes->K3R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 4)); - aes->K2R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 5)); - aes->K1R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 6)); - aes->K0R = DEU_ENDIAN_SWAP(*((u32 *) in_key + 7)); - } - else { - printk (KERN_ERR "[%s %s %d]: Invalid key_len : %d\n", __FILE__, __func__, __LINE__, key_len); - CRTCL_SECT_END; - return;// -EINVAL; - } - - /* let HW pre-process DEcryption key in any case (even if - ENcryption is used). Key Valid (KV) bit is then only - checked in decryption routine! */ - aes->controlr.PNK = 1; - - - aes->controlr.E_D = !encdec; //encryption - aes->controlr.O = mode; //0 ECB 1 CBC 2 OFB 3 CFB 4 CTR - - //aes->controlr.F = 128; //default; only for CFB and OFB modes; change only for customer-specific apps - if (mode > 0) { - aes->IV3R = DEU_ENDIAN_SWAP(*(u32 *) iv_arg); - aes->IV2R = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 1)); - aes->IV1R = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 2)); - aes->IV0R = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 3)); - }; - - - i = 0; - while (byte_cnt >= 16) { - - aes->ID3R = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + (i * 4) + 0)); - aes->ID2R = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + (i * 4) + 1)); - aes->ID1R = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + (i * 4) + 2)); - aes->ID0R = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + (i * 4) + 3)); /* start crypto */ - - while (aes->controlr.BUS) { - // this will not take long - } - - *((volatile u32 *) out_arg + (i * 4) + 0) = aes->OD3R; - *((volatile u32 *) out_arg + (i * 4) + 1) = aes->OD2R; - *((volatile u32 *) out_arg + (i * 4) + 2) = aes->OD1R; - *((volatile u32 *) out_arg + (i * 4) + 3) = aes->OD0R; - - i++; - byte_cnt -= 16; - } - - - //tc.chen : copy iv_arg back - if (mode > 0) { - *((u32 *) iv_arg) = DEU_ENDIAN_SWAP(*((u32 *) iv_arg)); - *((u32 *) iv_arg + 1) = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 1)); - *((u32 *) iv_arg + 2) = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 2)); - *((u32 *) iv_arg + 3) = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 3)); - } - - CRTCL_SECT_END; -} - -/*! - * \fn int ctr_rfc3686_aes_set_key (struct crypto_tfm *tfm, const uint8_t *in_key, unsigned int key_len) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets RFC3686 key - * \param tfm linux crypto algo transform - * \param in_key input key - * \param key_len key lengths of 20, 28 and 36 bytes supported; last 4 bytes is nonce - * \return 0 - SUCCESS - * -EINVAL - bad key length -*/ -int ctr_rfc3686_aes_set_key (struct crypto_tfm *tfm, const uint8_t *in_key, unsigned int key_len) -{ - struct aes_ctx *ctx = crypto_tfm_ctx(tfm); - unsigned long *flags = (unsigned long *)&tfm->crt_flags; - - //printk("ctr_rfc3686_aes_set_key in %s\n", __FILE__); - - memcpy(ctx->nonce, in_key + (key_len - CTR_RFC3686_NONCE_SIZE), - CTR_RFC3686_NONCE_SIZE); - - key_len -= CTR_RFC3686_NONCE_SIZE; // remove 4 bytes of nonce - - if (key_len != 16 && key_len != 24 && key_len != 32) { - *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; - return -EINVAL; - } - - ctx->key_length = key_len; - - memcpy ((u8 *) (ctx->buf), in_key, key_len); - - return 0; -} - -/*! \fn void ifx_deu_aes (void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) - * \ingroup IFX_AES_FUNCTIONS - * \brief main interface with deu hardware in DMA mode - * \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 -*/ - - -//definitions from linux/include/crypto.h: -//#define CRYPTO_TFM_MODE_ECB 0x00000001 -//#define CRYPTO_TFM_MODE_CBC 0x00000002 -//#define CRYPTO_TFM_MODE_CFB 0x00000004 -//#define CRYPTO_TFM_MODE_CTR 0x00000008 -//#define CRYPTO_TFM_MODE_OFB 0x00000010 // not even defined -//but hardware definition: 0 ECB 1 CBC 2 OFB 3 CFB 4 CTR - -/*! \fn void ifx_deu_aes_ecb (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets AES 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 -*/ -void ifx_deu_aes_ecb (void *ctx, uint8_t *dst, const uint8_t *src, - uint8_t *iv, size_t nbytes, int encdec, int inplace) -{ - ifx_deu_aes (ctx, dst, src, NULL, nbytes, encdec, 0); -} - -/*! \fn void ifx_deu_aes_cbc (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets AES hardware to CBC 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 -*/ -void ifx_deu_aes_cbc (void *ctx, uint8_t *dst, const uint8_t *src, - uint8_t *iv, size_t nbytes, int encdec, int inplace) -{ - ifx_deu_aes (ctx, dst, src, iv, nbytes, encdec, 1); -} - -/*! \fn void ifx_deu_aes_ofb (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets AES hardware to OFB 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 -*/ -void ifx_deu_aes_ofb (void *ctx, uint8_t *dst, const uint8_t *src, - uint8_t *iv, size_t nbytes, int encdec, int inplace) -{ - ifx_deu_aes (ctx, dst, src, iv, nbytes, encdec, 2); -} - -/*! \fn void ifx_deu_aes_cfb (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets AES hardware to CFB 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 -*/ -void ifx_deu_aes_cfb (void *ctx, uint8_t *dst, const uint8_t *src, - uint8_t *iv, size_t nbytes, int encdec, int inplace) -{ - ifx_deu_aes (ctx, dst, src, iv, nbytes, encdec, 3); -} - -/*! \fn void ifx_deu_aes_ctr (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) - * \ingroup IFX_AES_FUNCTIONS - * \brief sets AES hardware to CTR 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 -*/ -void ifx_deu_aes_ctr (void *ctx, uint8_t *dst, const uint8_t *src, - uint8_t *iv, size_t nbytes, int encdec, int inplace) -{ - ifx_deu_aes (ctx, dst, src, iv, nbytes, encdec, 4); -} - -/*! \fn void aes_encrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) - * \ingroup IFX_AES_FUNCTIONS - * \brief encrypt AES_BLOCK_SIZE of data - * \param tfm linux crypto algo transform - * \param out output bytestream - * \param in input bytestream -*/ -void aes_encrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) -{ - struct aes_ctx *ctx = crypto_tfm_ctx(tfm); - ifx_deu_aes (ctx, out, in, NULL, AES_BLOCK_SIZE, - CRYPTO_DIR_ENCRYPT, 0); -} - -/*! \fn void aes_decrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) - * \ingroup IFX_AES_FUNCTIONS - * \brief decrypt AES_BLOCK_SIZE of data - * \param tfm linux crypto algo transform - * \param out output bytestream - * \param in input bytestream -*/ -void aes_decrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) -{ - struct aes_ctx *ctx = crypto_tfm_ctx(tfm); - ifx_deu_aes (ctx, out, in, NULL, AES_BLOCK_SIZE, - CRYPTO_DIR_DECRYPT, 0); -} - -/* - * \brief AES function mappings -*/ -struct crypto_alg ifxdeu_aes_alg = { - .cra_name = "aes", - .cra_driver_name = "ifxdeu-aes", - .cra_flags = CRYPTO_ALG_TYPE_CIPHER, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct aes_ctx), - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_aes_alg.cra_list), - .cra_u = { - .cipher = { - .cia_min_keysize = AES_MIN_KEY_SIZE, - .cia_max_keysize = AES_MAX_KEY_SIZE, - .cia_setkey = aes_set_key, - .cia_encrypt = aes_encrypt, - .cia_decrypt = aes_decrypt, - } - } -}; - -/*! \fn int ecb_aes_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief ECB AES encrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int ecb_aes_encrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, - NULL, nbytes, CRYPTO_DIR_ENCRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/*! \fn int ecb_aes_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief ECB AES decrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int ecb_aes_decrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, - NULL, nbytes, CRYPTO_DIR_DECRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/* - * \brief AES function mappings -*/ -struct crypto_alg ifxdeu_ecb_aes_alg = { - .cra_name = "ecb(aes)", - .cra_driver_name = "ifxdeu-ecb(aes)", - .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct aes_ctx), - .cra_type = &crypto_blkcipher_type, - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_ecb_aes_alg.cra_list), - .cra_u = { - .blkcipher = { - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .setkey = aes_set_key, - .encrypt = ecb_aes_encrypt, - .decrypt = ecb_aes_decrypt, - } - } -}; - - -/*! \fn int cbc_aes_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief CBC AES encrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int cbc_aes_encrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - u8 *iv = walk.iv; - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_cbc(ctx, walk.dst.virt.addr, walk.src.virt.addr, - iv, nbytes, CRYPTO_DIR_ENCRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/*! \fn int cbc_aes_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief CBC AES decrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int cbc_aes_decrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - u8 *iv = walk.iv; - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_cbc(ctx, walk.dst.virt.addr, walk.src.virt.addr, - iv, nbytes, CRYPTO_DIR_DECRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/* - * \brief AES function mappings -*/ -struct crypto_alg ifxdeu_cbc_aes_alg = { - .cra_name = "cbc(aes)", - .cra_driver_name = "ifxdeu-cbc(aes)", - .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct aes_ctx), - .cra_type = &crypto_blkcipher_type, - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_cbc_aes_alg.cra_list), - .cra_u = { - .blkcipher = { - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .ivsize = AES_BLOCK_SIZE, - .setkey = aes_set_key, - .encrypt = cbc_aes_encrypt, - .decrypt = cbc_aes_decrypt, - } - } -}; - - -/*! \fn int ctr_basic_aes_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief Counter mode AES encrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int ctr_basic_aes_encrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - u8 *iv = walk.iv; - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_ctr(ctx, walk.dst.virt.addr, walk.src.virt.addr, - iv, nbytes, CRYPTO_DIR_ENCRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/*! \fn int ctr_basic_aes_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief Counter mode AES decrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int ctr_basic_aes_decrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - while ((nbytes = walk.nbytes)) { - u8 *iv = walk.iv; - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_ctr(ctx, walk.dst.virt.addr, walk.src.virt.addr, - iv, nbytes, CRYPTO_DIR_DECRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/* - * \brief AES function mappings -*/ -struct crypto_alg ifxdeu_ctr_basic_aes_alg = { - .cra_name = "ctr(aes)", - .cra_driver_name = "ifxdeu-ctr(aes)", - .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct aes_ctx), - .cra_type = &crypto_blkcipher_type, - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_ctr_basic_aes_alg.cra_list), - .cra_u = { - .blkcipher = { - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .ivsize = AES_BLOCK_SIZE, - .setkey = aes_set_key, - .encrypt = ctr_basic_aes_encrypt, - .decrypt = ctr_basic_aes_decrypt, - } - } -}; - - -/*! \fn int ctr_rfc3686_aes_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief Counter mode AES (rfc3686) encrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int ctr_rfc3686_aes_encrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - u8 rfc3686_iv[16]; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - /* set up counter block */ - memcpy(rfc3686_iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE); - memcpy(rfc3686_iv + CTR_RFC3686_NONCE_SIZE, walk.iv, CTR_RFC3686_IV_SIZE); - - /* initialize counter portion of counter block */ - *(__be32 *)(rfc3686_iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) = - cpu_to_be32(1); - - while ((nbytes = walk.nbytes)) { - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_ctr(ctx, walk.dst.virt.addr, walk.src.virt.addr, - rfc3686_iv, nbytes, CRYPTO_DIR_ENCRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/*! \fn int ctr_rfc3686_aes_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) - * \ingroup IFX_AES_FUNCTIONS - * \brief Counter mode AES (rfc3686) decrypt using linux crypto blkcipher - * \param desc blkcipher descriptor - * \param dst output scatterlist - * \param src input scatterlist - * \param nbytes data size in bytes - * \return err -*/ -int ctr_rfc3686_aes_decrypt(struct blkcipher_desc *desc, - struct scatterlist *dst, struct scatterlist *src, - unsigned int nbytes) -{ - struct aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); - struct blkcipher_walk walk; - int err; - u8 rfc3686_iv[16]; - - blkcipher_walk_init(&walk, dst, src, nbytes); - err = blkcipher_walk_virt(desc, &walk); - - /* set up counter block */ - memcpy(rfc3686_iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE); - memcpy(rfc3686_iv + CTR_RFC3686_NONCE_SIZE, walk.iv, CTR_RFC3686_IV_SIZE); - - /* initialize counter portion of counter block */ - *(__be32 *)(rfc3686_iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) = - cpu_to_be32(1); - - while ((nbytes = walk.nbytes)) { - nbytes -= (nbytes % AES_BLOCK_SIZE); - ifx_deu_aes_ctr(ctx, walk.dst.virt.addr, walk.src.virt.addr, - rfc3686_iv, nbytes, CRYPTO_DIR_DECRYPT, 0); - nbytes &= AES_BLOCK_SIZE - 1; - err = blkcipher_walk_done(desc, &walk, nbytes); - } - - return err; -} - -/* - * \brief AES function mappings -*/ -struct crypto_alg ifxdeu_ctr_rfc3686_aes_alg = { - .cra_name = "rfc3686(ctr(aes))", - .cra_driver_name = "ifxdeu-ctr-rfc3686(aes)", - .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct aes_ctx), - .cra_type = &crypto_blkcipher_type, - .cra_module = THIS_MODULE, - .cra_list = LIST_HEAD_INIT(ifxdeu_ctr_rfc3686_aes_alg.cra_list), - .cra_u = { - .blkcipher = { - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = CTR_RFC3686_MAX_KEY_SIZE, - .ivsize = CTR_RFC3686_IV_SIZE, - .setkey = ctr_rfc3686_aes_set_key, - .encrypt = ctr_rfc3686_aes_encrypt, - .decrypt = ctr_rfc3686_aes_decrypt, - } - } -}; - - -/*! \fn int __init ifxdeu_init_aes (void) - * \ingroup IFX_AES_FUNCTIONS - * \brief function to initialize AES driver - * \return ret -*/ -int __init ifxdeu_init_aes (void) -{ - int ret = -ENOSYS; - - - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) - if (!disable_multiblock) { - ifxdeu_aes_alg.cra_u.cipher.cia_max_nbytes = AES_BLOCK_SIZE; //(size_t)-1; - ifxdeu_aes_alg.cra_u.cipher.cia_req_align = 16; - ifxdeu_aes_alg.cra_u.cipher.cia_ecb = ifx_deu_aes_ecb; - ifxdeu_aes_alg.cra_u.cipher.cia_cbc = ifx_deu_aes_cbc; - ifxdeu_aes_alg.cra_u.cipher.cia_cfb = ifx_deu_aes_cfb; - ifxdeu_aes_alg.cra_u.cipher.cia_ofb = ifx_deu_aes_ofb; - } -#endif - - if ((ret = crypto_register_alg(&ifxdeu_aes_alg))) - goto aes_err; - - if ((ret = crypto_register_alg(&ifxdeu_ecb_aes_alg))) - goto ecb_aes_err; - - if ((ret = crypto_register_alg(&ifxdeu_cbc_aes_alg))) - goto cbc_aes_err; - - if ((ret = crypto_register_alg(&ifxdeu_ctr_basic_aes_alg))) - goto ctr_basic_aes_err; - - if ((ret = crypto_register_alg(&ifxdeu_ctr_rfc3686_aes_alg))) - goto ctr_rfc3686_aes_err; - - aes_chip_init (); - - CRTCL_SECT_INIT; - - - printk (KERN_NOTICE "IFX DEU AES initialized%s%s.\n", disable_multiblock ? "" : " (multiblock)", disable_deudma ? "" : " (DMA)"); - return ret; - -ctr_rfc3686_aes_err: - crypto_unregister_alg(&ifxdeu_ctr_rfc3686_aes_alg); - printk (KERN_ERR "IFX ctr_rfc3686_aes initialization failed!\n"); - return ret; -ctr_basic_aes_err: - crypto_unregister_alg(&ifxdeu_ctr_basic_aes_alg); - printk (KERN_ERR "IFX ctr_basic_aes initialization failed!\n"); - return ret; -cbc_aes_err: - crypto_unregister_alg(&ifxdeu_cbc_aes_alg); - printk (KERN_ERR "IFX cbc_aes initialization failed!\n"); - return ret; -ecb_aes_err: - crypto_unregister_alg(&ifxdeu_ecb_aes_alg); - printk (KERN_ERR "IFX aes initialization failed!\n"); - return ret; -aes_err: - printk(KERN_ERR "IFX DEU AES initialization failed!\n"); - - return ret; -} - -/*! \fn void __exit ifxdeu_fini_aes (void) - * \ingroup IFX_AES_FUNCTIONS - * \brief unregister aes driver -*/ -void __exit ifxdeu_fini_aes (void) -{ - crypto_unregister_alg (&ifxdeu_aes_alg); - crypto_unregister_alg (&ifxdeu_ecb_aes_alg); - crypto_unregister_alg (&ifxdeu_cbc_aes_alg); - crypto_unregister_alg (&ifxdeu_ctr_basic_aes_alg); - crypto_unregister_alg (&ifxdeu_ctr_rfc3686_aes_alg); - -} - - |