| 1 | /****************************************************************************** |
| 2 | ** |
| 3 | ** FILE NAME : ifxmips_des.c |
| 4 | ** PROJECT : IFX UEIP |
| 5 | ** MODULES : DEU Module |
| 6 | ** |
| 7 | ** DATE : September 8, 2009 |
| 8 | ** AUTHOR : Mohammad Firdaus |
| 9 | ** DESCRIPTION : Data Encryption Unit Driver for DES Algorithm |
| 10 | ** COPYRIGHT : Copyright (c) 2009 |
| 11 | ** Infineon Technologies AG |
| 12 | ** Am Campeon 1-12, 85579 Neubiberg, Germany |
| 13 | ** |
| 14 | ** This program is free software; you can redistribute it and/or modify |
| 15 | ** it under the terms of the GNU General Public License as published by |
| 16 | ** the Free Software Foundation; either version 2 of the License, or |
| 17 | ** (at your option) any later version. |
| 18 | ** |
| 19 | ** HISTORY |
| 20 | ** $Date $Author $Comment |
| 21 | ** 08 Sept 2009 Mohammad Firdaus Initial UEIP release |
| 22 | *******************************************************************************/ |
| 23 | |
| 24 | /*! |
| 25 | \defgroup IFX_DEU IFX_DEU_DRIVERS |
| 26 | \ingroup API |
| 27 | \brief ifx deu driver |
| 28 | */ |
| 29 | |
| 30 | /*! |
| 31 | \file ifxmips_des.c |
| 32 | \ingroup IFX_DEU |
| 33 | \brief DES encryption DEU driver file |
| 34 | */ |
| 35 | |
| 36 | /*! |
| 37 | \defgroup IFX_DES_FUNCTIONS IFX_DES_FUNCTIONS |
| 38 | \ingroup IFX_DEU |
| 39 | \brief IFX DES Encryption functions |
| 40 | */ |
| 41 | |
| 42 | /* Project Header Files */ |
| 43 | #include <linux/version.h> |
| 44 | #include <linux/module.h> |
| 45 | #include <linux/init.h> |
| 46 | #include <linux/types.h> |
| 47 | #include <linux/errno.h> |
| 48 | #include <linux/crypto.h> |
| 49 | #include <linux/interrupt.h> |
| 50 | #include <linux/delay.h> |
| 51 | #include <asm/byteorder.h> |
| 52 | #include <crypto/algapi.h> |
| 53 | #include "ifxmips_deu.h" |
| 54 | |
| 55 | #if defined(CONFIG_DANUBE) |
| 56 | #include "ifxmips_deu_danube.h" |
| 57 | extern int ifx_danube_pre_1_4; |
| 58 | #elif defined(CONFIG_AR9) |
| 59 | #include "ifxmips_deu_ar9.h" |
| 60 | #elif defined(CONFIG_VR9) || defined(CONFIG_AR10) |
| 61 | #include "ifxmips_deu_vr9.h" |
| 62 | #else |
| 63 | #error "Unkown platform" |
| 64 | #endif |
| 65 | |
| 66 | /* DMA specific header and variables */ |
| 67 | |
| 68 | #if 0 |
| 69 | #define CRTCL_SECT_INIT |
| 70 | #define CRTCL_SECT_START |
| 71 | #define CRTCL_SECT_END |
| 72 | #else |
| 73 | spinlock_t des_lock; |
| 74 | #define CRTCL_SECT_INIT spin_lock_init(&des_lock) |
| 75 | #define CRTCL_SECT_START spin_lock_irqsave(&des_lock, flag) |
| 76 | #define CRTCL_SECT_END spin_unlock_irqrestore(&des_lock, flag) |
| 77 | #endif |
| 78 | |
| 79 | /* Preprocessor declerations */ |
| 80 | #ifdef CRYPTO_DEBUG |
| 81 | extern char debug_level; |
| 82 | #define DPRINTF(level, format, args...) if (level < debug_level) printk(KERN_INFO "[%s %s %d]: " format, __FILE__, __func__, __LINE__, ##args); |
| 83 | #else |
| 84 | #define DPRINTF(level, format, args...) |
| 85 | #endif |
| 86 | #define DES_3DES_START IFX_DES_CON |
| 87 | #define DES_KEY_SIZE 8 |
| 88 | #define DES_EXPKEY_WORDS 32 |
| 89 | #define DES_BLOCK_SIZE 8 |
| 90 | #define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE) |
| 91 | #define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS) |
| 92 | #define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE |
| 93 | |
| 94 | /* Function Declaration to prevent warning messages */ |
| 95 | void des_chip_init (void); |
| 96 | u32 endian_swap(u32 input); |
| 97 | u32 input_swap(u32 input); |
| 98 | int aes_memory_allocate(int value); |
| 99 | int des_memory_allocate(int value); |
| 100 | void memory_release(u32 *buffer); |
| 101 | u32* memory_alignment(const u8 *arg, u32 *buff_alloc, int in_out, int nbytes); |
| 102 | void aes_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); |
| 103 | void des_dma_memory_copy(u32 *outcopy, u32 *out_dma, u8 *out_arg, int nbytes); |
| 104 | |
| 105 | void ifx_deu_des (void *ctx_arg, u8 *out_arg, const u8 *in_arg, |
| 106 | u8 *iv_arg, u32 nbytes, int encdec, int mode); |
| 107 | |
| 108 | struct des_ctx { |
| 109 | int controlr_M; |
| 110 | int key_length; |
| 111 | u8 iv[DES_BLOCK_SIZE]; |
| 112 | u32 expkey[DES3_EDE_EXPKEY_WORDS]; |
| 113 | }; |
| 114 | |
| 115 | extern int disable_multiblock; |
| 116 | extern int disable_deudma; |
| 117 | |
| 118 | |
| 119 | /*! \fn int des_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) |
| 120 | * \ingroup IFX_DES_FUNCTIONS |
| 121 | * \brief sets DES key |
| 122 | * \param tfm linux crypto algo transform |
| 123 | * \param key input key |
| 124 | * \param keylen key length |
| 125 | */ |
| 126 | int des_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 127 | unsigned int keylen) |
| 128 | { |
| 129 | struct des_ctx *dctx = crypto_tfm_ctx(tfm); |
| 130 | |
| 131 | //printk("setkey in %s\n", __FILE__); |
| 132 | |
| 133 | dctx->controlr_M = 0; // des |
| 134 | dctx->key_length = keylen; |
| 135 | |
| 136 | memcpy ((u8 *) (dctx->expkey), key, keylen); |
| 137 | |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | /*! \fn void ifx_deu_des(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) |
| 143 | * \ingroup IFX_DES_FUNCTIONS |
| 144 | * \brief main interface to DES hardware |
| 145 | * \param ctx_arg crypto algo context |
| 146 | * \param out_arg output bytestream |
| 147 | * \param in_arg input bytestream |
| 148 | * \param iv_arg initialization vector |
| 149 | * \param nbytes length of bytestream |
| 150 | * \param encdec 1 for encrypt; 0 for decrypt |
| 151 | * \param mode operation mode such as ebc, cbc |
| 152 | */ |
| 153 | |
| 154 | void ifx_deu_des (void *ctx_arg, u8 *out_arg, const u8 *in_arg, |
| 155 | u8 *iv_arg, u32 nbytes, int encdec, int mode) |
| 156 | { |
| 157 | volatile struct des_t *des = (struct des_t *) DES_3DES_START; |
| 158 | struct des_ctx *dctx = ctx_arg; |
| 159 | u32 *key = dctx->expkey; |
| 160 | unsigned long flag; |
| 161 | |
| 162 | int i = 0; |
| 163 | int nblocks = 0; |
| 164 | |
| 165 | CRTCL_SECT_START; |
| 166 | |
| 167 | des->controlr.M = dctx->controlr_M; |
| 168 | if (dctx->controlr_M == 0) // des |
| 169 | { |
| 170 | des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0)); |
| 171 | des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1)); |
| 172 | |
| 173 | } |
| 174 | else { |
| 175 | /* Hardware Section */ |
| 176 | switch (dctx->key_length) { |
| 177 | case 24: |
| 178 | des->K3HR = DEU_ENDIAN_SWAP(*((u32 *) key + 4)); |
| 179 | des->K3LR = DEU_ENDIAN_SWAP(*((u32 *) key + 5)); |
| 180 | /* no break; */ |
| 181 | |
| 182 | case 16: |
| 183 | des->K2HR = DEU_ENDIAN_SWAP(*((u32 *) key + 2)); |
| 184 | des->K2LR = DEU_ENDIAN_SWAP(*((u32 *) key + 3)); |
| 185 | |
| 186 | /* no break; */ |
| 187 | case 8: |
| 188 | des->K1HR = DEU_ENDIAN_SWAP(*((u32 *) key + 0)); |
| 189 | des->K1LR = DEU_ENDIAN_SWAP(*((u32 *) key + 1)); |
| 190 | break; |
| 191 | |
| 192 | default: |
| 193 | CRTCL_SECT_END; |
| 194 | return; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | des->controlr.E_D = !encdec; //encryption |
| 199 | des->controlr.O = mode; //0 ECB 1 CBC 2 OFB 3 CFB 4 CTR hexdump(prin,sizeof(*des)); |
| 200 | |
| 201 | if (mode > 0) { |
| 202 | des->IVHR = DEU_ENDIAN_SWAP(*(u32 *) iv_arg); |
| 203 | des->IVLR = DEU_ENDIAN_SWAP(*((u32 *) iv_arg + 1)); |
| 204 | }; |
| 205 | |
| 206 | nblocks = nbytes / 4; |
| 207 | |
| 208 | for (i = 0; i < nblocks; i += 2) { |
| 209 | /* wait for busy bit to clear */ |
| 210 | |
| 211 | /*--- Workaround ---------------------------------------------------- |
| 212 | do a dummy read to the busy flag because it is not raised early |
| 213 | enough in CFB/OFB 3DES modes */ |
| 214 | #ifdef CRYPTO_DEBUG |
| 215 | printk ("ihr: %x\n", (*((u32 *) in_arg + i))); |
| 216 | printk ("ilr: %x\n", (*((u32 *) in_arg + 1 + i))); |
| 217 | #endif |
| 218 | des->IHR = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + i)); |
| 219 | des->ILR = INPUT_ENDIAN_SWAP(*((u32 *) in_arg + 1 + i)); /* start crypto */ |
| 220 | |
| 221 | while (des->controlr.BUS) { |
| 222 | // this will not take long |
| 223 | } |
| 224 | |
| 225 | *((u32 *) out_arg + 0 + i) = des->OHR; |
| 226 | *((u32 *) out_arg + 1 + i) = des->OLR; |
| 227 | |
| 228 | } |
| 229 | |
| 230 | |
| 231 | |
| 232 | if (mode > 0) { |
| 233 | *(u32 *) iv_arg = DEU_ENDIAN_SWAP(des->IVHR); |
| 234 | *((u32 *) iv_arg + 1) = DEU_ENDIAN_SWAP(des->IVLR); |
| 235 | }; |
| 236 | |
| 237 | CRTCL_SECT_END; |
| 238 | } |
| 239 | |
| 240 | //definitions from linux/include/crypto.h: |
| 241 | //#define CRYPTO_TFM_MODE_ECB 0x00000001 |
| 242 | //#define CRYPTO_TFM_MODE_CBC 0x00000002 |
| 243 | //#define CRYPTO_TFM_MODE_CFB 0x00000004 |
| 244 | //#define CRYPTO_TFM_MODE_CTR 0x00000008 |
| 245 | //#define CRYPTO_TFM_MODE_OFB 0x00000010 // not even defined |
| 246 | //but hardware definition: 0 ECB 1 CBC 2 OFB 3 CFB 4 CTR |
| 247 | |
| 248 | /*! \fn void ifx_deu_des(void *ctx_arg, u8 *out_arg, const u8 *in_arg, u8 *iv_arg, u32 nbytes, int encdec, int mode) |
| 249 | * \ingroup IFX_DES_FUNCTIONS |
| 250 | * \brief main interface to DES hardware |
| 251 | * \param ctx_arg crypto algo context |
| 252 | * \param out_arg output bytestream |
| 253 | * \param in_arg input bytestream |
| 254 | * \param iv_arg initialization vector |
| 255 | * \param nbytes length of bytestream |
| 256 | * \param encdec 1 for encrypt; 0 for decrypt |
| 257 | * \param mode operation mode such as ebc, cbc |
| 258 | */ |
| 259 | |
| 260 | |
| 261 | |
| 262 | /*! \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) |
| 263 | * \ingroup IFX_DES_FUNCTIONS |
| 264 | * \brief sets DES hardware to ECB mode |
| 265 | * \param ctx crypto algo context |
| 266 | * \param dst output bytestream |
| 267 | * \param src input bytestream |
| 268 | * \param iv initialization vector |
| 269 | * \param nbytes length of bytestream |
| 270 | * \param encdec 1 for encrypt; 0 for decrypt |
| 271 | * \param inplace not used |
| 272 | */ |
| 273 | |
| 274 | void ifx_deu_des_ecb (void *ctx, uint8_t *dst, const uint8_t *src, |
| 275 | uint8_t *iv, size_t nbytes, int encdec, int inplace) |
| 276 | { |
| 277 | ifx_deu_des (ctx, dst, src, NULL, nbytes, encdec, 0); |
| 278 | } |
| 279 | |
| 280 | /*! \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) |
| 281 | * \ingroup IFX_DES_FUNCTIONS |
| 282 | * \brief sets DES hardware to CBC mode |
| 283 | * \param ctx crypto algo context |
| 284 | * \param dst output bytestream |
| 285 | * \param src input bytestream |
| 286 | * \param iv initialization vector |
| 287 | * \param nbytes length of bytestream |
| 288 | * \param encdec 1 for encrypt; 0 for decrypt |
| 289 | * \param inplace not used |
| 290 | */ |
| 291 | void ifx_deu_des_cbc (void *ctx, uint8_t *dst, const uint8_t *src, |
| 292 | uint8_t *iv, size_t nbytes, int encdec, int inplace) |
| 293 | { |
| 294 | ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 1); |
| 295 | } |
| 296 | |
| 297 | /*! \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) |
| 298 | * \ingroup IFX_DES_FUNCTIONS |
| 299 | * \brief sets DES hardware to OFB mode |
| 300 | * \param ctx crypto algo context |
| 301 | * \param dst output bytestream |
| 302 | * \param src input bytestream |
| 303 | * \param iv initialization vector |
| 304 | * \param nbytes length of bytestream |
| 305 | * \param encdec 1 for encrypt; 0 for decrypt |
| 306 | * \param inplace not used |
| 307 | */ |
| 308 | void ifx_deu_des_ofb (void *ctx, uint8_t *dst, const uint8_t *src, |
| 309 | uint8_t *iv, size_t nbytes, int encdec, int inplace) |
| 310 | { |
| 311 | ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 2); |
| 312 | } |
| 313 | |
| 314 | /*! \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) |
| 315 | \ingroup IFX_DES_FUNCTIONS |
| 316 | \brief sets DES hardware to CFB mode |
| 317 | \param ctx crypto algo context |
| 318 | \param dst output bytestream |
| 319 | \param src input bytestream |
| 320 | \param iv initialization vector |
| 321 | \param nbytes length of bytestream |
| 322 | \param encdec 1 for encrypt; 0 for decrypt |
| 323 | \param inplace not used |
| 324 | */ |
| 325 | void ifx_deu_des_cfb (void *ctx, uint8_t *dst, const uint8_t *src, |
| 326 | uint8_t *iv, size_t nbytes, int encdec, int inplace) |
| 327 | { |
| 328 | ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 3); |
| 329 | } |
| 330 | |
| 331 | /*! \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) |
| 332 | * \ingroup IFX_DES_FUNCTIONS |
| 333 | * \brief sets DES hardware to CTR mode |
| 334 | * \param ctx crypto algo context |
| 335 | * \param dst output bytestream |
| 336 | * \param src input bytestream |
| 337 | * \param iv initialization vector |
| 338 | * \param nbytes length of bytestream |
| 339 | * \param encdec 1 for encrypt; 0 for decrypt |
| 340 | * \param inplace not used |
| 341 | */ |
| 342 | void ifx_deu_des_ctr (void *ctx, uint8_t *dst, const uint8_t *src, |
| 343 | uint8_t *iv, size_t nbytes, int encdec, int inplace) |
| 344 | { |
| 345 | ifx_deu_des (ctx, dst, src, iv, nbytes, encdec, 4); |
| 346 | } |
| 347 | |
| 348 | /*! \fn void des_encrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) |
| 349 | * \ingroup IFX_DES_FUNCTIONS |
| 350 | * \brief encrypt DES_BLOCK_SIZE of data |
| 351 | * \param tfm linux crypto algo transform |
| 352 | * \param out output bytestream |
| 353 | * \param in input bytestream |
| 354 | */ |
| 355 | void des_encrypt (struct crypto_tfm *tfm, uint8_t * out, const uint8_t * in) |
| 356 | { |
| 357 | struct des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 358 | ifx_deu_des (ctx, out, in, NULL, DES_BLOCK_SIZE, |
| 359 | CRYPTO_DIR_ENCRYPT, 0); |
| 360 | |
| 361 | } |
| 362 | |
| 363 | /*! \fn void des_decrypt (struct crypto_tfm *tfm, uint8_t *out, const uint8_t *in) |
| 364 | * \ingroup IFX_DES_FUNCTIONS |
| 365 | * \brief encrypt DES_BLOCK_SIZE of data |
| 366 | * \param tfm linux crypto algo transform |
| 367 | * \param out output bytestream |
| 368 | * \param in input bytestream |
| 369 | */ |
| 370 | void des_decrypt (struct crypto_tfm *tfm, uint8_t * out, const uint8_t * in) |
| 371 | { |
| 372 | struct des_ctx *ctx = crypto_tfm_ctx(tfm); |
| 373 | ifx_deu_des (ctx, out, in, NULL, DES_BLOCK_SIZE, |
| 374 | CRYPTO_DIR_DECRYPT, 0); |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * \brief RFC2451: |
| 379 | * |
| 380 | * For DES-EDE3, there is no known need to reject weak or |
| 381 | * complementation keys. Any weakness is obviated by the use of |
| 382 | * multiple keys. |
| 383 | * |
| 384 | * However, if the first two or last two independent 64-bit keys are |
| 385 | * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the |
| 386 | * same as DES. Implementers MUST reject keys that exhibit this |
| 387 | * property. |
| 388 | * |
| 389 | */ |
| 390 | |
| 391 | /*! \fn int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) |
| 392 | * \ingroup IFX_DES_FUNCTIONS |
| 393 | * \brief sets 3DES key |
| 394 | * \param tfm linux crypto algo transform |
| 395 | * \param key input key |
| 396 | * \param keylen key length |
| 397 | */ |
| 398 | int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 399 | unsigned int keylen) |
| 400 | { |
| 401 | struct des_ctx *dctx = crypto_tfm_ctx(tfm); |
| 402 | |
| 403 | //printk("setkey in %s\n", __FILE__); |
| 404 | |
| 405 | dctx->controlr_M = keylen / 8 + 1; // 3DES EDE1 / EDE2 / EDE3 Mode |
| 406 | dctx->key_length = keylen; |
| 407 | |
| 408 | memcpy ((u8 *) (dctx->expkey), key, keylen); |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * \brief DES function mappings |
| 415 | */ |
| 416 | struct crypto_alg ifxdeu_des_alg = { |
| 417 | .cra_name = "des", |
| 418 | .cra_driver_name = "ifxdeu-des", |
| 419 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 420 | .cra_blocksize = DES_BLOCK_SIZE, |
| 421 | .cra_ctxsize = sizeof(struct des_ctx), |
| 422 | .cra_module = THIS_MODULE, |
| 423 | .cra_alignmask = 3, |
| 424 | .cra_list = LIST_HEAD_INIT(ifxdeu_des_alg.cra_list), |
| 425 | .cra_u = { .cipher = { |
| 426 | .cia_min_keysize = DES_KEY_SIZE, |
| 427 | .cia_max_keysize = DES_KEY_SIZE, |
| 428 | .cia_setkey = des_setkey, |
| 429 | .cia_encrypt = des_encrypt, |
| 430 | .cia_decrypt = des_decrypt } } |
| 431 | }; |
| 432 | |
| 433 | /* |
| 434 | * \brief DES function mappings |
| 435 | */ |
| 436 | struct crypto_alg ifxdeu_des3_ede_alg = { |
| 437 | .cra_name = "des3_ede", |
| 438 | .cra_driver_name = "ifxdeu-des3_ede", |
| 439 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 440 | .cra_blocksize = DES_BLOCK_SIZE, |
| 441 | .cra_ctxsize = sizeof(struct des_ctx), |
| 442 | .cra_module = THIS_MODULE, |
| 443 | .cra_alignmask = 3, |
| 444 | .cra_list = LIST_HEAD_INIT(ifxdeu_des3_ede_alg.cra_list), |
| 445 | .cra_u = { .cipher = { |
| 446 | .cia_min_keysize = DES_KEY_SIZE, |
| 447 | .cia_max_keysize = DES_KEY_SIZE, |
| 448 | .cia_setkey = des3_ede_setkey, |
| 449 | .cia_encrypt = des_encrypt, |
| 450 | .cia_decrypt = des_decrypt } } |
| 451 | }; |
| 452 | |
| 453 | /*! \fn int ecb_des_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) |
| 454 | * \ingroup IFX_DES_FUNCTIONS |
| 455 | * \brief ECB DES encrypt using linux crypto blkcipher |
| 456 | * \param desc blkcipher descriptor |
| 457 | * \param dst output scatterlist |
| 458 | * \param src input scatterlist |
| 459 | * \param nbytes data size in bytes |
| 460 | */ |
| 461 | int ecb_des_encrypt(struct blkcipher_desc *desc, |
| 462 | struct scatterlist *dst, struct scatterlist *src, |
| 463 | unsigned int nbytes) |
| 464 | { |
| 465 | struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 466 | struct blkcipher_walk walk; |
| 467 | int err; |
| 468 | |
| 469 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 470 | err = blkcipher_walk_virt(desc, &walk); |
| 471 | |
| 472 | while ((nbytes = walk.nbytes)) { |
| 473 | nbytes -= (nbytes % DES_BLOCK_SIZE); |
| 474 | ifx_deu_des_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| 475 | NULL, nbytes, CRYPTO_DIR_ENCRYPT, 0); |
| 476 | nbytes &= DES_BLOCK_SIZE - 1; |
| 477 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 478 | } |
| 479 | |
| 480 | return err; |
| 481 | } |
| 482 | |
| 483 | /*! \fn int ecb_des_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) |
| 484 | * \ingroup IFX_DES_FUNCTIONS |
| 485 | * \brief ECB DES decrypt using linux crypto blkcipher |
| 486 | * \param desc blkcipher descriptor |
| 487 | * \param dst output scatterlist |
| 488 | * \param src input scatterlist |
| 489 | * \param nbytes data size in bytes |
| 490 | * \return err |
| 491 | */ |
| 492 | int ecb_des_decrypt(struct blkcipher_desc *desc, |
| 493 | struct scatterlist *dst, struct scatterlist *src, |
| 494 | unsigned int nbytes) |
| 495 | { |
| 496 | struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 497 | struct blkcipher_walk walk; |
| 498 | int err; |
| 499 | |
| 500 | DPRINTF(1, "\n"); |
| 501 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 502 | err = blkcipher_walk_virt(desc, &walk); |
| 503 | |
| 504 | while ((nbytes = walk.nbytes)) { |
| 505 | nbytes -= (nbytes % DES_BLOCK_SIZE); |
| 506 | ifx_deu_des_ecb(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| 507 | NULL, nbytes, CRYPTO_DIR_DECRYPT, 0); |
| 508 | nbytes &= DES_BLOCK_SIZE - 1; |
| 509 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 510 | } |
| 511 | |
| 512 | return err; |
| 513 | } |
| 514 | |
| 515 | /* |
| 516 | * \brief DES function mappings |
| 517 | */ |
| 518 | struct crypto_alg ifxdeu_ecb_des_alg = { |
| 519 | .cra_name = "ecb(des)", |
| 520 | .cra_driver_name = "ifxdeu-ecb(des)", |
| 521 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 522 | .cra_blocksize = DES_BLOCK_SIZE, |
| 523 | .cra_ctxsize = sizeof(struct des_ctx), |
| 524 | .cra_type = &crypto_blkcipher_type, |
| 525 | .cra_module = THIS_MODULE, |
| 526 | .cra_list = LIST_HEAD_INIT(ifxdeu_ecb_des_alg.cra_list), |
| 527 | .cra_u = { |
| 528 | .blkcipher = { |
| 529 | .min_keysize = DES_KEY_SIZE, |
| 530 | .max_keysize = DES_KEY_SIZE, |
| 531 | .setkey = des_setkey, |
| 532 | .encrypt = ecb_des_encrypt, |
| 533 | .decrypt = ecb_des_decrypt, |
| 534 | } |
| 535 | } |
| 536 | }; |
| 537 | |
| 538 | /* |
| 539 | * \brief DES function mappings |
| 540 | */ |
| 541 | struct crypto_alg ifxdeu_ecb_des3_ede_alg = { |
| 542 | .cra_name = "ecb(des3_ede)", |
| 543 | .cra_driver_name = "ifxdeu-ecb(des3_ede)", |
| 544 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 545 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 546 | .cra_ctxsize = sizeof(struct des_ctx), |
| 547 | .cra_type = &crypto_blkcipher_type, |
| 548 | .cra_module = THIS_MODULE, |
| 549 | .cra_list = LIST_HEAD_INIT(ifxdeu_ecb_des3_ede_alg.cra_list), |
| 550 | .cra_u = { |
| 551 | .blkcipher = { |
| 552 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 553 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 554 | .setkey = des3_ede_setkey, |
| 555 | .encrypt = ecb_des_encrypt, |
| 556 | .decrypt = ecb_des_decrypt, |
| 557 | } |
| 558 | } |
| 559 | }; |
| 560 | |
| 561 | /*! \fn int cbc_des_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) |
| 562 | * \ingroup IFX_DES_FUNCTIONS |
| 563 | * \brief CBC DES encrypt using linux crypto blkcipher |
| 564 | * \param desc blkcipher descriptor |
| 565 | * \param dst output scatterlist |
| 566 | * \param src input scatterlist |
| 567 | * \param nbytes data size in bytes |
| 568 | * \return err |
| 569 | */ |
| 570 | int cbc_des_encrypt(struct blkcipher_desc *desc, |
| 571 | struct scatterlist *dst, struct scatterlist *src, |
| 572 | unsigned int nbytes) |
| 573 | { |
| 574 | struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 575 | struct blkcipher_walk walk; |
| 576 | int err; |
| 577 | |
| 578 | DPRINTF(1, "\n"); |
| 579 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 580 | err = blkcipher_walk_virt(desc, &walk); |
| 581 | |
| 582 | while ((nbytes = walk.nbytes)) { |
| 583 | u8 *iv = walk.iv; |
| 584 | nbytes -= (nbytes % DES_BLOCK_SIZE); |
| 585 | ifx_deu_des_cbc(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| 586 | iv, nbytes, CRYPTO_DIR_ENCRYPT, 0); |
| 587 | nbytes &= DES_BLOCK_SIZE - 1; |
| 588 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 589 | } |
| 590 | |
| 591 | return err; |
| 592 | } |
| 593 | |
| 594 | /*! \fn int cbc_des_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) |
| 595 | * \ingroup IFX_DES_FUNCTIONS |
| 596 | * \brief CBC DES decrypt using linux crypto blkcipher |
| 597 | * \param desc blkcipher descriptor |
| 598 | * \param dst output scatterlist |
| 599 | * \param src input scatterlist |
| 600 | * \param nbytes data size in bytes |
| 601 | * \return err |
| 602 | */ |
| 603 | int cbc_des_decrypt(struct blkcipher_desc *desc, |
| 604 | struct scatterlist *dst, struct scatterlist *src, |
| 605 | unsigned int nbytes) |
| 606 | { |
| 607 | struct des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 608 | struct blkcipher_walk walk; |
| 609 | int err; |
| 610 | |
| 611 | DPRINTF(1, "\n"); |
| 612 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 613 | err = blkcipher_walk_virt(desc, &walk); |
| 614 | |
| 615 | while ((nbytes = walk.nbytes)) { |
| 616 | u8 *iv = walk.iv; |
| 617 | nbytes -= (nbytes % DES_BLOCK_SIZE); |
| 618 | ifx_deu_des_cbc(ctx, walk.dst.virt.addr, walk.src.virt.addr, |
| 619 | iv, nbytes, CRYPTO_DIR_DECRYPT, 0); |
| 620 | nbytes &= DES_BLOCK_SIZE - 1; |
| 621 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 622 | } |
| 623 | |
| 624 | return err; |
| 625 | } |
| 626 | |
| 627 | /* |
| 628 | * \brief DES function mappings |
| 629 | */ |
| 630 | struct crypto_alg ifxdeu_cbc_des_alg = { |
| 631 | .cra_name = "cbc(des)", |
| 632 | .cra_driver_name = "ifxdeu-cbc(des)", |
| 633 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 634 | .cra_blocksize = DES_BLOCK_SIZE, |
| 635 | .cra_ctxsize = sizeof(struct des_ctx), |
| 636 | .cra_type = &crypto_blkcipher_type, |
| 637 | .cra_module = THIS_MODULE, |
| 638 | .cra_list = LIST_HEAD_INIT(ifxdeu_cbc_des_alg.cra_list), |
| 639 | .cra_u = { |
| 640 | .blkcipher = { |
| 641 | .min_keysize = DES_KEY_SIZE, |
| 642 | .max_keysize = DES_KEY_SIZE, |
| 643 | .ivsize = DES_BLOCK_SIZE, |
| 644 | .setkey = des_setkey, |
| 645 | .encrypt = cbc_des_encrypt, |
| 646 | .decrypt = cbc_des_decrypt, |
| 647 | } |
| 648 | } |
| 649 | }; |
| 650 | |
| 651 | /* |
| 652 | * \brief DES function mappings |
| 653 | */ |
| 654 | struct crypto_alg ifxdeu_cbc_des3_ede_alg = { |
| 655 | .cra_name = "cbc(des3_ede)", |
| 656 | .cra_driver_name = "ifxdeu-cbc(des3_ede)", |
| 657 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 658 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 659 | .cra_ctxsize = sizeof(struct des_ctx), |
| 660 | .cra_type = &crypto_blkcipher_type, |
| 661 | .cra_module = THIS_MODULE, |
| 662 | .cra_list = LIST_HEAD_INIT(ifxdeu_cbc_des3_ede_alg.cra_list), |
| 663 | .cra_u = { |
| 664 | .blkcipher = { |
| 665 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 666 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 667 | .ivsize = DES_BLOCK_SIZE, |
| 668 | .setkey = des3_ede_setkey, |
| 669 | .encrypt = cbc_des_encrypt, |
| 670 | .decrypt = cbc_des_decrypt, |
| 671 | } |
| 672 | } |
| 673 | }; |
| 674 | |
| 675 | /*! \fn int __init ifxdeu_init_des (void) |
| 676 | * \ingroup IFX_DES_FUNCTIONS |
| 677 | * \brief initialize des driver |
| 678 | */ |
| 679 | int __init ifxdeu_init_des (void) |
| 680 | { |
| 681 | int ret = -ENOSYS; |
| 682 | |
| 683 | |
| 684 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)) |
| 685 | if (!disable_multiblock) { |
| 686 | ifxdeu_des_alg.cra_u.cipher.cia_max_nbytes = DES_BLOCK_SIZE; //(size_t)-1; |
| 687 | ifxdeu_des_alg.cra_u.cipher.cia_req_align = 16; |
| 688 | ifxdeu_des_alg.cra_u.cipher.cia_ecb = ifx_deu_des_ecb; |
| 689 | ifxdeu_des_alg.cra_u.cipher.cia_cbc = ifx_deu_des_cbc; |
| 690 | ifxdeu_des_alg.cra_u.cipher.cia_cfb = ifx_deu_des_cfb; |
| 691 | ifxdeu_des_alg.cra_u.cipher.cia_ofb = ifx_deu_des_ofb; |
| 692 | } |
| 693 | #endif |
| 694 | |
| 695 | ret = crypto_register_alg(&ifxdeu_des_alg); |
| 696 | if (ret < 0) |
| 697 | goto des_err; |
| 698 | |
| 699 | ret = crypto_register_alg(&ifxdeu_ecb_des_alg); |
| 700 | if (ret < 0) |
| 701 | goto ecb_des_err; |
| 702 | |
| 703 | ret = crypto_register_alg(&ifxdeu_cbc_des_alg); |
| 704 | if (ret < 0) |
| 705 | goto cbc_des_err; |
| 706 | |
| 707 | ret = crypto_register_alg(&ifxdeu_des3_ede_alg); |
| 708 | if (ret < 0) |
| 709 | goto des3_ede_err; |
| 710 | |
| 711 | ret = crypto_register_alg(&ifxdeu_ecb_des3_ede_alg); |
| 712 | if (ret < 0) |
| 713 | goto ecb_des3_ede_err; |
| 714 | |
| 715 | ret = crypto_register_alg(&ifxdeu_cbc_des3_ede_alg); |
| 716 | if (ret < 0) |
| 717 | goto cbc_des3_ede_err; |
| 718 | |
| 719 | des_chip_init(); |
| 720 | CRTCL_SECT_INIT; |
| 721 | |
| 722 | |
| 723 | |
| 724 | printk (KERN_NOTICE "IFX DEU DES initialized%s%s.\n", disable_multiblock ? "" : " (multiblock)", disable_deudma ? "" : " (DMA)"); |
| 725 | return ret; |
| 726 | |
| 727 | des_err: |
| 728 | crypto_unregister_alg(&ifxdeu_des_alg); |
| 729 | printk(KERN_ERR "IFX des initialization failed!\n"); |
| 730 | return ret; |
| 731 | ecb_des_err: |
| 732 | crypto_unregister_alg(&ifxdeu_ecb_des_alg); |
| 733 | printk (KERN_ERR "IFX ecb_des initialization failed!\n"); |
| 734 | return ret; |
| 735 | cbc_des_err: |
| 736 | crypto_unregister_alg(&ifxdeu_cbc_des_alg); |
| 737 | printk (KERN_ERR "IFX cbc_des initialization failed!\n"); |
| 738 | return ret; |
| 739 | des3_ede_err: |
| 740 | crypto_unregister_alg(&ifxdeu_des3_ede_alg); |
| 741 | printk(KERN_ERR "IFX des3_ede initialization failed!\n"); |
| 742 | return ret; |
| 743 | ecb_des3_ede_err: |
| 744 | crypto_unregister_alg(&ifxdeu_ecb_des3_ede_alg); |
| 745 | printk (KERN_ERR "IFX ecb_des3_ede initialization failed!\n"); |
| 746 | return ret; |
| 747 | cbc_des3_ede_err: |
| 748 | crypto_unregister_alg(&ifxdeu_cbc_des3_ede_alg); |
| 749 | printk (KERN_ERR "IFX cbc_des3_ede initialization failed!\n"); |
| 750 | return ret; |
| 751 | |
| 752 | } |
| 753 | |
| 754 | /*! \fn void __exit ifxdeu_fini_des (void) |
| 755 | * \ingroup IFX_DES_FUNCTIONS |
| 756 | * \brief unregister des driver |
| 757 | */ |
| 758 | void __exit ifxdeu_fini_des (void) |
| 759 | { |
| 760 | crypto_unregister_alg (&ifxdeu_des_alg); |
| 761 | crypto_unregister_alg (&ifxdeu_ecb_des_alg); |
| 762 | crypto_unregister_alg (&ifxdeu_cbc_des_alg); |
| 763 | crypto_unregister_alg (&ifxdeu_des3_ede_alg); |
| 764 | crypto_unregister_alg (&ifxdeu_ecb_des3_ede_alg); |
| 765 | crypto_unregister_alg (&ifxdeu_cbc_des3_ede_alg); |
| 766 | |
| 767 | } |
| 768 | |
| 769 | |
