diff options
Diffstat (limited to 'target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_des.c')
| -rwxr-xr-x | target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_des.c | 893 |
1 files changed, 893 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_des.c b/target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_des.c new file mode 100755 index 000000000..ffceb2868 --- /dev/null +++ b/target/linux/ifxmips/files-2.6.33/drivers/crypto/ifxmips/ifxmips_des.c @@ -0,0 +1,893 @@ +/* + * 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 +*/ + +/*! + \file ifxmips_des.c + \ingroup IFX_DEU + \brief DES encryption DEU driver file +*/ + +/*! + \defgroup IFX_DES_FUNCTIONS IFX_DES_FUNCTIONS + \ingroup IFX_DEU + \brief IFX DES Encryption functions +*/ + +/* Project Header Files */ +#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 <linux/interrupt.h> +#include <linux/delay.h> +#include <asm/byteorder.h> +#include <crypto/algapi.h> +#include "ifxmips_deu.h" + +/* DMA specific header and variables */ +#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_DMA +#include "ifxmips_deu_dma.h" +#include <asm/ifx/irq.h> +#include <asm/ifx/ifx_dma_core.h> +extern _ifx_deu_device ifx_deu[1]; +extern u32 *des_buff_in; +extern u32 *des_buff_out; +#ifndef CONFIG_CRYPTO_DEV_IFXMIPS_POLL_DMA +#define CONFIG_CRYPTO_DEV_IFXMIPS_POLL_DMA +#endif /* CONFIG_CRYPTO_DEV_IFXMIPS_POLL_DMA */ +#endif /* CONFIG_CRYPTO_DEV_IFXMIPS_DMA */ + +spinlock_t des_lock; +#define CRTCL_SECT_INIT spin_lock_init(&des_lock) +#define CRTCL_SECT_START spin_lock_irqsave(&des_lock, flag) +#define CRTCL_SECT_END spin_unlock_irqrestore(&des_lock, flag) + +/* Preprocessor declarations */ +#define DES_3DES_START IFX_DES_CON +#define DES_KEY_SIZE 8 +#define DES_EXPKEY_WORDS 32 +#define DES_BLOCK_SIZE 8 +#define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE) +#define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS) +#define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE + +/* Function Declaration to prevent warning messages */ +void des_chip_init (void); +u32 endian_swap(u32 input); +u32 input_swap(u32 input); +int aes_memory_allocate(int value); +int des_memory_allocate(int value); +void memory_release(u32 *buffer); +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); + +#ifndef CONFIG_CRYPTO_DEV_IFXMIPS_DMA +void ifx_deu_des (void *ctx_arg, u8 *out_arg, const u8 *in_arg, + u8 *iv_arg, u32 nbytes, int encdec, int mode); +#else +void ifx_deu_des_core (void *ctx_arg, u8 *out_arg, const u8 *in_arg, + u8 *iv_arg, u32 nbytes, int encdec, int mode); +#endif /* CONFIG_CRYPTO_DEV_IFXMIPS_DMA */ + +struct des_ctx { + int controlr_M; + int key_length; + u8 iv[DES_BLOCK_SIZE]; + u32 expkey[DES3_EDE_EXPKEY_WORDS]; +}; + +extern int disable_deudma; + +/*! \fn int des_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len) + * \ingroup IFX_DES_FUNCTIONS + * \brief sets DES key + * \param tfm linux crypto algo transform + * \param key input key + * \param key_len key length +*/ +int des_setkey(struct crypto_tfm *tfm, const u8 *key, + unsigned int key_len) +{ + struct des_ctx *ctx = crypto_tfm_ctx(tfm); + + DPRINTF(0, "ctx @%p, key_len %d %d\n", ctx, key_len); + + ctx->controlr_M = 0; /* des */ + ctx->key_length = key_len; + + memcpy ((u8 *) (ctx->expkey), key, key_len); + + return 0; +} + +#ifndef CONFIG_CRYPTO_DEV_IFXMIPS_DMA +/*! \fn void ifx_deu_des(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) + * \ingroup IFX_DES_FUNCTIONS + * \brief main interface to DES 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 +*/ + +void ifx_deu_des (void *ctx_arg, u8 *out_arg, const u8 *in_arg, + u8 *iv_arg, u32 nbytes, int encdec, int mode) +#else +/*! \fn void ifx_deu_des_core(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) + * \ingroup IFX_DES_FUNCTIONS + * \brief main interface to DES 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 +*/ + +void ifx_deu_des_core (void *ctx_arg, u8 *out_arg, const u8 *in_arg, + u8 *iv_arg, u32 nbytes, int encdec, int mode) +#endif +{ + volatile struct des_t *des = (struct des_t *) DES_3DES_START; + struct des_ctx *dctx = ctx_arg; + u32 *key = dctx->expkey; + ulong flag; + +#ifndef CONFIG_CRYPTO_DEV_IFXMIPS_DMA + int i = 0; + int nblocks = 0; +#else + volatile struct deu_dma_t *dma = (struct deu_dma_t *) IFX_DEU_DMA_CON; + struct dma_device_info *dma_device = ifx_deu[0].dma_device; + //deu_drv_priv_t *deu_priv = (deu_drv_priv_t *)dma_device->priv; + int wlen = 0; + u32 *outcopy = NULL; + u32 *dword_mem_aligned_in = NULL; + +#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_POLL_DMA + u32 timeout = 0; + u32 *out_dma = NULL; +#endif + +#endif + + DPRINTF(0, "ctx @%p, mode %d, encdec %d\n", dctx, mode, encdec); + + CRTCL_SECT_START; + + des->controlr.E_D = !encdec; /* encryption */ + des->controlr.O = mode; /* 0 ECB, 1 CBC, 2 OFB, 3 CFB, 4 CTR */ + des->controlr.SM = 1; /* start after writing input register */ + des->controlr.DAU = 0; /* Disable Automatic Update of init vector */ + des->controlr.ARS = 1; /* Autostart Select - write to IHR */ + + des->controlr.M = dctx->controlr_M; + /* write keys */ + if (dctx->controlr_M == 0) { + /* DES mode */ + des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0)); + des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1)); +#ifdef CRYPTO_DEBUG + printk ("key1: %x\n", (*((u32 *) key + 0))); + printk ("key2: %x\n", (*((u32 *) key + 1))); +#endif + } else { + /* 3DES mode (EDE-x) */ + switch (dctx->key_length) { + case 24: + des->K3HR = DEU_ENDIAN_SWAP(*((u32 *) key + 4)); + des->K3LR = DEU_ENDIAN_SWAP(*((u32 *) key + 5)); + /* no break; */ + case 16: + des->K2HR = DEU_ENDIAN_SWAP(*((u32 *) key + 2)); + des->K2LR = DEU_ENDIAN_SWAP(*((u32 *) key + 3)); + /* no break; */ + case 8: + des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0)); + des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1)); + break; + default: + CRTCL_SECT_END; + return; + } + } + + /* write init vector (not required for ECB mode) */ + if (mode > 0) { + des->IVHR = DEU_ENDIAN_SWAP(*(u32 *) iv_arg); + des->IVLR = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 1)); + } + +#ifndef CONFIG_CRYPTO_DEV_IFXMIPS_DMA + nblocks = nbytes / 4; + + for (i = 0; i < nblocks; i += 2) { + /* wait for busy bit to clear */ + + /*--- Workaround ---------------------------------------------------- + do a dummy read to the busy flag because it is not raised early + enough in CFB/OFB 3DES modes */ +#ifdef CRYPTO_DEBUG + printk ("ihr: %x\n", (*((u32 *) in_arg + i))); + printk ("ilr: %x\n", (*((u32 *) in_arg + 1 + i))); +#endif + des->IHR = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + i)); + des->ILR = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + 1 + i)); /* start crypto */ + + while (des->controlr.BUS) { + /* this will not take long */ + } + + *((u32 *) out_arg + 0 + i) = des->OHR; + *((u32 *) out_arg + 1 + i) = des->OLR; + +#ifdef CRYPTO_DEBUG + printk ("ohr: %x\n", (*((u32 *) out_arg + i))); + printk ("olr: %x\n", (*((u32 *) out_arg + 1 + i))); +#endif + } + +#else /* dma mode */ + + /* Prepare Rx buf length used in dma psuedo interrupt */ + //deu_priv->deu_rx_buf = out_arg; + //deu_priv->deu_rx_len = nbytes; + + /* memory alignment issue */ + dword_mem_aligned_in = (u32 *) DEU_DWORD_REORDERING(in_arg, des_buff_in, BUFFER_IN, nbytes); + + dma->controlr.ALGO = 0; //DES + des->controlr.DAU = 0; + dma->controlr.BS = 0; + dma->controlr.EN = 1; + + while (des->controlr.BUS) { + // wait for AES to be ready + }; + + wlen = dma_device_write (dma_device, (u8 *) dword_mem_aligned_in, nbytes, NULL); + if (wlen != nbytes) { + dma->controlr.EN = 0; + CRTCL_SECT_END; + printk (KERN_ERR "[%s %s %d]: dma_device_write fail!\n", __FILE__, __func__, __LINE__); + return; // -EINVAL; + } + + WAIT_DES_DMA_READY(); + +#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_POLL_DMA + + outcopy = (u32 *) DEU_DWORD_REORDERING(out_arg, des_buff_out, BUFFER_OUT, nbytes); + + // polling DMA rx channel + while ((dma_device_read (dma_device, (u8 **) &out_dma, NULL)) == 0) { + timeout++; + + if (timeout >= 333000) { + dma->controlr.EN = 0; + CRTCL_SECT_END; + printk (KERN_ERR "[%s %s %d]: timeout!!\n", __FILE__, __func__, __LINE__); + return; // -EINVAL; + } + } + + WAIT_DES_DMA_READY(); + + DES_MEMORY_COPY(outcopy, out_dma, out_arg, nbytes); + +#else + + CRTCL_SECT_END; /* Sleep and wait for Rx finished */ + DEU_WAIT_EVENT(deu_priv->deu_thread_wait, DEU_EVENT, deu_priv->deu_event_flags); + CRTCL_SECT_START; + +#endif + +#endif /* dma mode */ + + if (mode > 0) { + *(u32 *) iv_arg = DEU_ENDIAN_SWAP(des->IVHR); + *((u32 *) iv_arg + 1) = DEU_ENDIAN_SWAP(des->IVLR); + }; + + CRTCL_SECT_END; +} + +//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_des(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) + * \ingroup IFX_DES_FUNCTIONS + * \brief main interface to DES 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 +*/ + +#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_DMA +void ifx_deu_des (void *ctx_arg, u8 *out_arg, const u8 *in_arg, + u8 *iv_arg, u32 nbytes, int encdec, int mode) +{ + u32 remain = nbytes; + u32 inc; + + DPRINTF(0, "\n"); + + while (remain > 0) + { + if (remain >= DEU_MAX_PACKET_SIZE) + { + inc = DEU_MAX_PACKET_SIZE; + } + else + { + inc = remain; + } + + remain -= inc; + + ifx_deu_des_core(ctx_arg, out_arg, in_arg, iv_arg, inc, encdec, mode); + + out_arg += inc; + in_arg += inc; + } +} +#endif + + +/*! \fn void ifx_deu_des_ecb (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) + * \ingroup IFX_DES_FUNCTIONS + * \brief sets DES 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_des_ecb (void *ctx, uint8_t *dst, const uint8_t *src, + uint8_t *iv, size_t nbytes, int encdec, int inplace) +{ + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, dst, src, NULL, nbytes, encdec, 0); +} + +/*! \fn void ifx_deu_des_cbc (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) + * \ingroup IFX_DES_FUNCTIONS + * \brief sets DES 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_des_cbc (void *ctx, uint8_t *dst, const uint8_t *src, + uint8_t *iv, size_t nbytes, int encdec, int inplace) +{ + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 1); +} + +/*! \fn void ifx_deu_des_ofb (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) + * \ingroup IFX_DES_FUNCTIONS + * \brief sets DES 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_des_ofb (void *ctx, uint8_t *dst, const uint8_t *src, + uint8_t *iv, size_t nbytes, int encdec, int inplace) +{ + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 2); +} + +/*! \fn void ifx_deu_des_cfb (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) + \ingroup IFX_DES_FUNCTIONS + \brief sets DES 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_des_cfb (void *ctx, uint8_t *dst, const uint8_t *src, + uint8_t *iv, size_t nbytes, int encdec, int inplace) +{ + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 3); +} + +/*! \fn void ifx_deu_des_ctr (void *ctx, uint8_t *dst, const uint8_t *src, uint8_t *iv, size_t nbytes, int encdec, int inplace) + * \ingroup IFX_DES_FUNCTIONS + * \brief sets DES 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_des_ctr (void *ctx, uint8_t *dst, const uint8_t *src, + uint8_t *iv, size_t nbytes, int encdec, int inplace) +{ + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 4); +} + +/*! \fn void des_encrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) + * \ingroup IFX_DES_FUNCTIONS + * \brief encrypt DES_BLOCK_SIZE of data + * \param tfm linux crypto algo transform + * \param out output bytestream + * \param in input bytestream +*/ +void des_encrypt (struct crypto_tfm *tfm, uint8_t * out, const uint8_t * in) +{ + struct des_ctx *ctx = crypto_tfm_ctx(tfm); + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, out, in, NULL, DES_BLOCK_SIZE, CRYPTO_DIR_ENCRYPT, 0); +} + +/*! \fn void des_decrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) + * \ingroup IFX_DES_FUNCTIONS + * \brief encrypt DES_BLOCK_SIZE of data + * \param tfm linux crypto algo transform + * \param out output bytestream + * \param in input bytestream +*/ +void des_decrypt (struct crypto_tfm *tfm, uint8_t * out, const uint8_t * in) +{ + struct des_ctx *ctx = crypto_tfm_ctx(tfm); + DPRINTF(0, "ctx @%p\n", ctx); + ifx_deu_des (ctx, out, in, NULL, DES_BLOCK_SIZE, CRYPTO_DIR_DECRYPT, 0); +} + +/* + * \brief RFC2451: + * + * For DES-EDE3, there is no known need to reject weak or + * complementation keys. Any weakness is obviated by the use of + * multiple keys. + * + * However, if the first two or last two independent 64-bit keys are + * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the + * same as DES. Implementers MUST reject keys that exhibit this + * property. + * + */ + +/*! \fn int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) + * \ingroup IFX_DES_FUNCTIONS + * \brief sets 3DES key + * \param tfm linux crypto algo transform + * \param key input key + * \param keylen key length +*/ +int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key, + unsigned int key_len) +{ + struct des_ctx *ctx = crypto_tfm_ctx(tfm); + + DPRINTF(0, "ctx @%p, key_len %d\n", ctx, key_len); + + ctx->controlr_M = key_len / 8 + 1; // 3DES EDE1 / EDE2 / EDE3 Mode + ctx->key_length = key_len; + + memcpy ((u8 *) (ctx->expkey), key, key_len); + + return 0; +} + +/* + * \brief DES function mappings +*/ +struct crypto_alg ifxdeu_des_alg = { + .cra_name = "des", + .cra_driver_name = "ifxdeu-des", + .cra_flags = CRYPTO_ALG_TYPE_CIPHER, + .cra_blocksize = DES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct des_ctx), + .cra_module = THIS_MODULE, + .cra_alignmask = 3, + .cra_list = LIST_HEAD_INIT(ifxdeu_des_alg.cra_list), + .cra_u = { .cipher = { + .cia_min_keysize = DES_KEY_SIZE, + .cia_max_keysize = DES_KEY_SIZE, + .cia_setkey = des_setkey, + .cia_encrypt = des_encrypt, + .cia_decrypt = des_decrypt } } +}; + +/* + * \brief DES function mappings +*/ +struct crypto_alg ifxdeu_des3_ede_alg = { + .cra_name = "des3_ede", + .cra_driver_name = "ifxdeu-des3_ede", + .cra_flags = CRYPTO_ALG_TYPE_CIPHER, + .cra_blocksize = DES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct des_ctx), + .cra_module = THIS_MODULE, + .cra_alignmask = 3, + .cra_list = LIST_HEAD_INIT(ifxdeu_des3_ede_alg.cra_list), + .cra_u = { .cipher = { + .cia_min_keysize = DES_KEY_SIZE, + .cia_max_keysize = DES_KEY_SIZE, + .cia_setkey = des3_ede_setkey, + .cia_encrypt = des_encrypt, + .cia_decrypt = des_decrypt } } +}; + +/*! \fn int ecb_des_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) + * \ingroup IFX_DES_FUNCTIONS + * \brief ECB DES encrypt using linux crypto blkcipher + * \param desc blkcipher descriptor + * \param dst output scatterlist + * \param src input scatterlist + * \param nbytes data size in bytes +*/ +int ecb_des_encrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err; + + DPRINTF(0, "ctx @%p\n", ctx); + + blkcipher_walk_init(&walk, dst, src, nbytes); + err = blkcipher_walk_virt(desc, &walk); + + while ((nbytes = walk.nbytes)) { + nbytes -= (nbytes % DES_BLOCK_SIZE); + ifx_deu_des_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, + NULL, nbytes, CRYPTO_DIR_ENCRYPT, 0); + nbytes &= DES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } + + return err; +} + +/*! \fn int ecb_des_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) + * \ingroup IFX_DES_FUNCTIONS + * \brief ECB DES 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_des_decrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err; + + DPRINTF(0, "ctx @%p\n", ctx); + + blkcipher_walk_init(&walk, dst, src, nbytes); + err = blkcipher_walk_virt(desc, &walk); + + while ((nbytes = walk.nbytes)) { + nbytes -= (nbytes % DES_BLOCK_SIZE); + ifx_deu_des_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, + NULL, nbytes, CRYPTO_DIR_DECRYPT, 0); + nbytes &= DES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } + + return err; +} + +/* + * \brief DES function mappings +*/ +struct crypto_alg ifxdeu_ecb_des_alg = { + .cra_name = "ecb(des)", + .cra_driver_name = "ifxdeu-ecb(des)", + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = DES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct des_ctx), + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(ifxdeu_ecb_des_alg.cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = DES_KEY_SIZE, + .max_keysize = DES_KEY_SIZE, + .setkey = des_setkey, + .encrypt = ecb_des_encrypt, + .decrypt = ecb_des_decrypt, + } + } +}; + +/* + * \brief DES function mappings +*/ +struct crypto_alg ifxdeu_ecb_des3_ede_alg = { + .cra_name = "ecb(des3_ede)", + .cra_driver_name = "ifxdeu-ecb(des3_ede)", + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = DES3_EDE_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct des_ctx), + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(ifxdeu_ecb_des3_ede_alg.cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = DES3_EDE_KEY_SIZE, + .max_keysize = DES3_EDE_KEY_SIZE, + .setkey = des3_ede_setkey, + .encrypt = ecb_des_encrypt, + .decrypt = ecb_des_decrypt, + } + } +}; + +/*! \fn int cbc_des_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) + * \ingroup IFX_DES_FUNCTIONS + * \brief CBC DES 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_des_encrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err; + + DPRINTF(0, "ctx @%p\n", ctx); + + blkcipher_walk_init(&walk, dst, src, nbytes); + err = blkcipher_walk_virt(desc, &walk); + + while ((nbytes = walk.nbytes)) { + u8 *iv = walk.iv; + //printk("iv = %08x\n", *(u32 *)iv); + nbytes -= (nbytes % DES_BLOCK_SIZE); + ifx_deu_des_cbc(ctx, walk.dst.virt.addr, walk.src.virt.addr, + iv, nbytes, CRYPTO_DIR_ENCRYPT, 0); + nbytes &= DES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } + + return err; +} + +/*! \fn int cbc_des_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) + * \ingroup IFX_DES_FUNCTIONS + * \brief CBC DES 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_des_decrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes) +{ + struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); + struct blkcipher_walk walk; + int err; + + DPRINTF(0, "ctx @%p\n", ctx); + + blkcipher_walk_init(&walk, dst, src, nbytes); + err = blkcipher_walk_virt(desc, &walk); + + while ((nbytes = walk.nbytes)) { + u8 *iv = walk.iv; + //printk("iv = %08x\n", *(u32 *)iv); + nbytes -= (nbytes % DES_BLOCK_SIZE); + ifx_deu_des_cbc(ctx, walk.dst.virt.addr, walk.src.virt.addr, + iv, nbytes, CRYPTO_DIR_DECRYPT, 0); + nbytes &= DES_BLOCK_SIZE - 1; + err = blkcipher_walk_done(desc, &walk, nbytes); + } + + return err; +} + +/* + * \brief DES function mappings +*/ +struct crypto_alg ifxdeu_cbc_des_alg = { + .cra_name = "cbc(des)", + .cra_driver_name = "ifxdeu-cbc(des)", + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = DES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct des_ctx), + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(ifxdeu_cbc_des_alg.cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = DES_KEY_SIZE, + .max_keysize = DES_KEY_SIZE, + .ivsize = DES_BLOCK_SIZE, + .setkey = des_setkey, + .encrypt = cbc_des_encrypt, + .decrypt = cbc_des_decrypt, + } + } +}; + +/* + * \brief DES function mappings +*/ +struct crypto_alg ifxdeu_cbc_des3_ede_alg = { + .cra_name = "cbc(des3_ede)", + .cra_driver_name = "ifxdeu-cbc(des3_ede)", + .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, + .cra_blocksize = DES3_EDE_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct des_ctx), + .cra_type = &crypto_blkcipher_type, + .cra_module = THIS_MODULE, + .cra_list = LIST_HEAD_INIT(ifxdeu_cbc_des3_ede_alg.cra_list), + .cra_u = { + .blkcipher = { + .min_keysize = DES3_EDE_KEY_SIZE, + .max_keysize = DES3_EDE_KEY_SIZE, + .ivsize = DES_BLOCK_SIZE, + .setkey = des3_ede_setkey, + .encrypt = cbc_des_encrypt, + .decrypt = cbc_des_decrypt, + } + } +}; + +/*! \fn int __init ifxdeu_init_des (void) + * \ingroup IFX_DES_FUNCTIONS + * \brief initialize des driver +*/ +int __init ifxdeu_init_des (void) +{ + int ret = 0; + + ret = crypto_register_alg(&ifxdeu_des_alg); + if (ret < 0) + goto des_err; + + ret = crypto_register_alg(&ifxdeu_ecb_des_alg); + if (ret < 0) + goto ecb_des_err; + + ret = crypto_register_alg(&ifxdeu_cbc_des_alg); + if (ret < 0) + goto cbc_des_err; + + ret = crypto_register_alg(&ifxdeu_des3_ede_alg); + if (ret < 0) + goto des3_ede_err; + + ret = crypto_register_alg(&ifxdeu_ecb_des3_ede_alg); + if (ret < 0) + goto ecb_des3_ede_err; + + ret = crypto_register_alg(&ifxdeu_cbc_des3_ede_alg); + if (ret < 0) + goto cbc_des3_ede_err; + + des_chip_init(); + + CRTCL_SECT_INIT; + +#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_DMA + if (ALLOCATE_MEMORY(BUFFER_IN, DES_ALGO) < 0) { + printk(KERN_ERR "[%s %s %d]: malloc memory fail!\n", __FILE__, __func__, __LINE__); + goto cbc_des3_ede_err; + } + if (ALLOCATE_MEMORY(BUFFER_OUT, DES_ALGO) < 0) { + printk(KERN_ERR "[%s %s %d]: malloc memory fail!\n", __FILE__, __func__, __LINE__); + goto cbc_des3_ede_err; + } +#endif + + printk (KERN_NOTICE "IFX DEU DES initialized %s.\n", disable_deudma ? "" : " (DMA)"); + return ret; + +des_err: + crypto_unregister_alg(&ifxdeu_des_alg); + printk(KERN_ERR "IFX des initialization failed!\n"); + return ret; +ecb_des_err: + crypto_unregister_alg(&ifxdeu_ecb_des_alg); + printk (KERN_ERR "IFX ecb_des initialization failed!\n"); + return ret; +cbc_des_err: + crypto_unregister_alg(&ifxdeu_cbc_des_alg); + printk (KERN_ERR "IFX cbc_des initialization failed!\n"); + return ret; +des3_ede_err: + crypto_unregister_alg(&ifxdeu_des3_ede_alg); + printk(KERN_ERR "IFX des3_ede initialization failed!\n"); + return ret; +ecb_des3_ede_err: + crypto_unregister_alg(&ifxdeu_ecb_des3_ede_alg); + printk (KERN_ERR "IFX ecb_des3_ede initialization failed!\n"); + return ret; +cbc_des3_ede_err: + crypto_unregister_alg(&ifxdeu_cbc_des3_ede_alg); + printk (KERN_ERR "IFX cbc_des3_ede initialization failed!\n"); + return ret; +} + +/*! \fn void __exit ifxdeu_fini_des (void) + * \ingroup IFX_DES_FUNCTIONS + * \brief unregister des driver +*/ +void __exit ifxdeu_fini_des (void) +{ + crypto_unregister_alg (&ifxdeu_des_alg); + crypto_unregister_alg (&ifxdeu_ecb_des_alg); + crypto_unregister_alg (&ifxdeu_cbc_des_alg); + crypto_unregister_alg (&ifxdeu_des3_ede_alg); + crypto_unregister_alg (&ifxdeu_ecb_des3_ede_alg); + crypto_unregister_alg (&ifxdeu_cbc_des3_ede_alg); + +#ifdef CONFIG_CRYPTO_DEV_IFXMIPS_DMA + FREE_MEMORY(des_buff_in); + FREE_MEMORY(des_buff_out); +#endif /* CONFIG_CRYPTO_DEV_IFXMIPS_DMA_DANUBE */ +} |