| 1 | /* |
| 2 | * arch/ubicom32/crypto/des_ubicom32.c |
| 3 | * Ubicom32 implementation of the DES Cipher Algorithm. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #include <crypto/algapi.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/module.h> |
| 31 | |
| 32 | #include "crypto_ubicom32.h" |
| 33 | extern int crypto_des_check_key(const u8 *key, unsigned int keylen, u32 *flags); |
| 34 | |
| 35 | #define DES_BLOCK_SIZE 8 |
| 36 | #define DES_KEY_SIZE 8 |
| 37 | |
| 38 | #define DES3_192_KEY_SIZE (3 * DES_KEY_SIZE) |
| 39 | #define DES3_192_BLOCK_SIZE DES_BLOCK_SIZE |
| 40 | |
| 41 | #define DES3_SUB_KEY(key, i) (((u8 *)key) + (i * DES_KEY_SIZE)) |
| 42 | |
| 43 | enum des_ops { |
| 44 | DES_ENCRYPT, |
| 45 | DES_DECRYPT, |
| 46 | |
| 47 | DES3_EDE_ENCRYPT, |
| 48 | DES3_EDE_DECRYPT, |
| 49 | |
| 50 | #ifdef DES3_EEE |
| 51 | DES3_EEE_ENCRYPT, |
| 52 | DES3_EEE_DECRYPT, |
| 53 | #endif |
| 54 | }; |
| 55 | |
| 56 | struct ubicom32_des_ctx { |
| 57 | u8 key[3 * DES_KEY_SIZE]; |
| 58 | u32 ctrl; |
| 59 | int key_len; |
| 60 | }; |
| 61 | |
| 62 | static inline void des_hw_set_key(const u8 *key, u8 key_len) |
| 63 | { |
| 64 | /* |
| 65 | * HW 3DES is not tested yet, use DES just as ipOS |
| 66 | */ |
| 67 | DES_SET_KEY(key); |
| 68 | } |
| 69 | |
| 70 | static inline void des_hw_cipher(u8 *out, const u8 *in) |
| 71 | { |
| 72 | SEC_SET_INPUT_2W(in); |
| 73 | |
| 74 | asm volatile ( |
| 75 | " ; start DES by writing 0x38(SECURITY_BASE) \n\t" |
| 76 | " move.4 0x38(%0), #0x01 \n\t" |
| 77 | " pipe_flush 0 \n\t" |
| 78 | " \n\t" |
| 79 | " ; wait for the module to calculate the output \n\t" |
| 80 | " btst 0x04(%0), #0 \n\t" |
| 81 | " jmpne.f .-4 \n\t" |
| 82 | : |
| 83 | : "a" (SEC_BASE) |
| 84 | : "cc" |
| 85 | ); |
| 86 | |
| 87 | SEC_GET_OUTPUT_2W(out); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | static void inline des3_hw_ede_encrypt(u8 *keys, u8 *out, const u8 *in) |
| 92 | { |
| 93 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 94 | des_hw_set_key(DES3_SUB_KEY(keys, 0), DES_KEY_SIZE); |
| 95 | des_hw_cipher(out, in); |
| 96 | |
| 97 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 98 | des_hw_set_key(DES3_SUB_KEY(keys, 1), DES_KEY_SIZE); |
| 99 | des_hw_cipher(out, out); |
| 100 | |
| 101 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 102 | des_hw_set_key(DES3_SUB_KEY(keys, 2), DES_KEY_SIZE); |
| 103 | des_hw_cipher(out, out); |
| 104 | } |
| 105 | |
| 106 | static void inline des3_hw_ede_decrypt(u8 *keys, u8 *out, const u8 *in) |
| 107 | { |
| 108 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 109 | des_hw_set_key(DES3_SUB_KEY(keys, 2), DES_KEY_SIZE); |
| 110 | des_hw_cipher(out, in); |
| 111 | |
| 112 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 113 | des_hw_set_key(DES3_SUB_KEY(keys, 1), DES_KEY_SIZE); |
| 114 | des_hw_cipher(out, out); |
| 115 | |
| 116 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 117 | des_hw_set_key(DES3_SUB_KEY(keys, 0), DES_KEY_SIZE); |
| 118 | des_hw_cipher(out, out); |
| 119 | } |
| 120 | |
| 121 | #ifdef DES3_EEE |
| 122 | static void inline des3_hw_eee_encrypt(u8 *keys, u8 *out, const u8 *in) |
| 123 | { |
| 124 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 125 | des_hw_set_key(DES3_SUB_KEY(keys, 0), 2); |
| 126 | des_hw_cipher(out, in); |
| 127 | |
| 128 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 129 | des_hw_set_key(DES3_SUB_KEY(keys, 1), 2); |
| 130 | des_hw_cipher(out, out); |
| 131 | |
| 132 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 133 | des_hw_set_key(DES3_SUB_KEY(keys, 2), 2); |
| 134 | des_hw_cipher(out, out); |
| 135 | } |
| 136 | |
| 137 | static void inline des3_hw_eee_decrypt(u8 *keys, u8 *out, const u8 *in) |
| 138 | { |
| 139 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 140 | des_hw_set_key(DES3_SUB_KEY(keys, 2), 2); |
| 141 | des_hw_cipher(out, in); |
| 142 | |
| 143 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 144 | des_hw_set_key(DES3_SUB_KEY(keys, 1), 2); |
| 145 | des_hw_cipher(out, out); |
| 146 | |
| 147 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 148 | des_hw_set_key(DES3_SUB_KEY(keys, 0), 2); |
| 149 | des_hw_cipher(out, out); |
| 150 | } |
| 151 | #endif |
| 152 | |
| 153 | static int des_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 154 | unsigned int keylen) |
| 155 | { |
| 156 | struct ubicom32_des_ctx *dctx = crypto_tfm_ctx(tfm); |
| 157 | u32 *flags = &tfm->crt_flags; |
| 158 | int ret; |
| 159 | |
| 160 | /* test if key is valid (not a weak key) */ |
| 161 | ret = crypto_des_check_key(key, keylen, flags); |
| 162 | if (ret == 0) { |
| 163 | memcpy(dctx->key, key, keylen); |
| 164 | dctx->key_len = keylen; |
| 165 | //dctx->ctrl = (keylen == DES_KEY_SIZE) ? SEC_ALG_DES : SEC_ALG_3DES |
| 166 | /* 2DES and 3DES are both implemented with DES hw function */ |
| 167 | dctx->ctrl = SEC_ALG_DES; |
| 168 | } |
| 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | static inline void des_cipher_1b(struct crypto_tfm *tfm, u8 *out, const u8 *in, u32 extra_flags) |
| 173 | { |
| 174 | const struct ubicom32_des_ctx *uctx = crypto_tfm_ctx(tfm); |
| 175 | |
| 176 | hw_crypto_lock(); |
| 177 | hw_crypto_check(); |
| 178 | hw_crypto_set_ctrl(uctx->ctrl | extra_flags); |
| 179 | |
| 180 | des_hw_set_key(uctx->key, uctx->key_len); |
| 181 | des_hw_cipher(out, in); |
| 182 | |
| 183 | hw_crypto_unlock(); |
| 184 | } |
| 185 | |
| 186 | static void des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| 187 | { |
| 188 | des_cipher_1b(tfm, out, in, SEC_DIR_ENCRYPT); |
| 189 | } |
| 190 | |
| 191 | static void des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| 192 | { |
| 193 | des_cipher_1b(tfm, out, in, SEC_DIR_DECRYPT); |
| 194 | } |
| 195 | |
| 196 | static struct crypto_alg des_alg = { |
| 197 | .cra_name = "des", |
| 198 | .cra_driver_name = "des-ubicom32", |
| 199 | .cra_priority = CRYPTO_UBICOM32_PRIORITY, |
| 200 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 201 | .cra_blocksize = DES_BLOCK_SIZE, |
| 202 | .cra_ctxsize = sizeof(struct ubicom32_des_ctx), |
| 203 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 204 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 205 | .cra_module = THIS_MODULE, |
| 206 | .cra_list = LIST_HEAD_INIT(des_alg.cra_list), |
| 207 | .cra_u = { |
| 208 | .cipher = { |
| 209 | .cia_min_keysize = DES_KEY_SIZE, |
| 210 | .cia_max_keysize = DES_KEY_SIZE, |
| 211 | .cia_setkey = des_setkey, |
| 212 | .cia_encrypt = des_encrypt, |
| 213 | .cia_decrypt = des_decrypt, |
| 214 | } |
| 215 | } |
| 216 | }; |
| 217 | |
| 218 | static void ecb_des_ciper_loop(u8 *out, u8 *in, unsigned int n) |
| 219 | { |
| 220 | while (likely(n)) { |
| 221 | des_hw_cipher(out, in); |
| 222 | out += DES_BLOCK_SIZE; |
| 223 | in += DES_BLOCK_SIZE; |
| 224 | n -= DES_BLOCK_SIZE; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | static void ecb_des3_ede_encrypt_loop(u8 *keys, u8 *out, u8 *in, unsigned int n) |
| 229 | { |
| 230 | while (likely(n)) { |
| 231 | des3_hw_ede_encrypt(keys, out, in); |
| 232 | |
| 233 | out += DES_BLOCK_SIZE; |
| 234 | in += DES_BLOCK_SIZE; |
| 235 | n -= DES_BLOCK_SIZE; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | static void ecb_des3_ede_decrypt_loop(u8 *keys, u8 *out, u8 *in, unsigned int n) |
| 240 | { |
| 241 | while (likely(n)) { |
| 242 | des3_hw_ede_decrypt(keys, out, in); |
| 243 | |
| 244 | out += DES_BLOCK_SIZE; |
| 245 | in += DES_BLOCK_SIZE; |
| 246 | n -= DES_BLOCK_SIZE; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | #ifdef DES3_EEE |
| 251 | static void ecb_des3_eee_encrypt_loop(u8 *keys, u8 *out, u8 *in, unsigned int n) |
| 252 | { |
| 253 | while (likely(n)) { |
| 254 | des3_hw_eee_encrypt(keys, out, in); |
| 255 | |
| 256 | out += DES_BLOCK_SIZE; |
| 257 | in += DES_BLOCK_SIZE; |
| 258 | n -= DES_BLOCK_SIZE; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | static void ecb_des3_eee_decrypt_loop(u8 *keys, u8 *out, u8 *in, unsigned int n) |
| 263 | { |
| 264 | while (likely(n)) { |
| 265 | des3_hw_eee_decrypt(keys, out, in); |
| 266 | |
| 267 | out += DES_BLOCK_SIZE; |
| 268 | in += DES_BLOCK_SIZE; |
| 269 | n -= DES_BLOCK_SIZE; |
| 270 | } |
| 271 | } |
| 272 | #endif |
| 273 | |
| 274 | static inline void ecb_des_cipher_n(struct ubicom32_des_ctx *uctx, enum des_ops op, u8 *out, u8 *in, unsigned int n) |
| 275 | { |
| 276 | switch (op) { |
| 277 | case DES_ENCRYPT: |
| 278 | case DES_DECRYPT: |
| 279 | /* set the right algo, direction and key once */ |
| 280 | hw_crypto_set_ctrl(SEC_ALG_DES | (op == DES_ENCRYPT ? SEC_DIR_ENCRYPT : 0)); |
| 281 | des_hw_set_key(uctx->key, uctx->key_len); |
| 282 | ecb_des_ciper_loop(out, in, n); |
| 283 | break; |
| 284 | |
| 285 | case DES3_EDE_ENCRYPT: |
| 286 | ecb_des3_ede_encrypt_loop(uctx->key, out, in, n); |
| 287 | break; |
| 288 | |
| 289 | case DES3_EDE_DECRYPT: |
| 290 | ecb_des3_ede_decrypt_loop(uctx->key, out, in, n); |
| 291 | break; |
| 292 | |
| 293 | #ifdef DES3_EEE |
| 294 | case DES3_EEE_ENCRYPT: |
| 295 | ecb_des3_eee_encrypt_loop(uctx->key, out, in, n); |
| 296 | break; |
| 297 | |
| 298 | case DES3_EEE_DECRYPT: |
| 299 | ecb_des3_eee_decrypt_loop(uctx->key, out, in, n); |
| 300 | break; |
| 301 | #endif |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | static inline void des_xor_2w(u32 *data, u32 *iv) |
| 306 | { |
| 307 | data[0] ^= iv[0]; |
| 308 | data[1] ^= iv[1]; |
| 309 | } |
| 310 | |
| 311 | static void cbc_des_encrypt_loop(u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 312 | { |
| 313 | while (likely(n)) { |
| 314 | des_xor_2w((u32 *)in, (u32 *)iv); |
| 315 | des_hw_cipher(out, in); |
| 316 | SEC_COPY_2W(iv, out); |
| 317 | out += DES_BLOCK_SIZE; |
| 318 | in += DES_BLOCK_SIZE; |
| 319 | n -= DES_BLOCK_SIZE; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | static void cbc_des_decrypt_loop(u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 324 | { |
| 325 | u8 next_iv[DES_BLOCK_SIZE]; |
| 326 | while (likely(n)) { |
| 327 | SEC_COPY_2W(next_iv, in); |
| 328 | des_hw_cipher(out, in); |
| 329 | des_xor_2w((u32 *)out, (u32 *)iv); |
| 330 | SEC_COPY_2W(iv, next_iv); |
| 331 | |
| 332 | out += DES_BLOCK_SIZE; |
| 333 | in += DES_BLOCK_SIZE; |
| 334 | n -= DES_BLOCK_SIZE; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | static void cbc_des3_ede_encrypt_loop(u8 *keys, u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 339 | { |
| 340 | while (likely(n)) { |
| 341 | des_xor_2w((u32 *)in, (u32 *)iv); |
| 342 | des3_hw_ede_encrypt(keys, out, in); |
| 343 | SEC_COPY_2W(iv, out); |
| 344 | |
| 345 | out += DES_BLOCK_SIZE; |
| 346 | in += DES_BLOCK_SIZE; |
| 347 | n -= DES_BLOCK_SIZE; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | static void cbc_des3_ede_decrypt_loop(u8 *keys, u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 352 | { |
| 353 | u8 next_iv[DES_BLOCK_SIZE]; |
| 354 | while (likely(n)) { |
| 355 | SEC_COPY_2W(next_iv, in); |
| 356 | des3_hw_ede_decrypt(keys, out, in); |
| 357 | des_xor_2w((u32 *)out, (u32 *)iv); |
| 358 | SEC_COPY_2W(iv, next_iv); |
| 359 | |
| 360 | out += DES_BLOCK_SIZE; |
| 361 | in += DES_BLOCK_SIZE; |
| 362 | n -= DES_BLOCK_SIZE; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | #ifdef DES3_EEE |
| 367 | static void cbc_des3_eee_encrypt_loop(u8 *keys, u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 368 | { |
| 369 | while (likely(n)) { |
| 370 | des_xor_2w((u32 *)in, (u32 *)iv); |
| 371 | des3_hw_eee_encrypt(keys, out, in); |
| 372 | SEC_COPY_2W(iv, out); |
| 373 | |
| 374 | out += DES_BLOCK_SIZE; |
| 375 | in += DES_BLOCK_SIZE; |
| 376 | n -= DES_BLOCK_SIZE; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | static void cbc_des3_eee_decrypt_loop(u8 *keys, u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 381 | { |
| 382 | u8 next_iv[DES_BLOCK_SIZE]; |
| 383 | while (likely(n)) { |
| 384 | SEC_COPY_2W(next_iv, in); |
| 385 | des3_hw_eee_decrypt(keys, out, in); |
| 386 | des_xor_2w((u32 *)out, (u32 *)iv); |
| 387 | SEC_COPY_2W(iv, next_iv); |
| 388 | |
| 389 | out += DES_BLOCK_SIZE; |
| 390 | in += DES_BLOCK_SIZE; |
| 391 | n -= DES_BLOCK_SIZE; |
| 392 | } |
| 393 | } |
| 394 | #endif |
| 395 | |
| 396 | static inline void cbc_des_cipher_n(struct ubicom32_des_ctx *uctx, enum des_ops op, u8 *out, u8 *in, u8 *iv, unsigned int n) |
| 397 | { |
| 398 | switch (op) { |
| 399 | case DES_ENCRYPT: |
| 400 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_ENCRYPT); |
| 401 | des_hw_set_key(uctx->key, uctx->key_len); |
| 402 | cbc_des_encrypt_loop(out, in, iv, n); |
| 403 | break; |
| 404 | |
| 405 | case DES_DECRYPT: |
| 406 | /* set the right algo, direction and key once */ |
| 407 | hw_crypto_set_ctrl(SEC_ALG_DES | SEC_DIR_DECRYPT); |
| 408 | des_hw_set_key(uctx->key, uctx->key_len); |
| 409 | cbc_des_decrypt_loop(out, in, iv, n); |
| 410 | break; |
| 411 | |
| 412 | case DES3_EDE_ENCRYPT: |
| 413 | cbc_des3_ede_encrypt_loop(uctx->key, out, in, iv, n); |
| 414 | break; |
| 415 | |
| 416 | case DES3_EDE_DECRYPT: |
| 417 | cbc_des3_ede_decrypt_loop(uctx->key, out, in, iv, n); |
| 418 | break; |
| 419 | |
| 420 | #ifdef DES3_EEE |
| 421 | case DES3_EEE_ENCRYPT: |
| 422 | cbc_des3_eee_encrypt_loop(uctx->key, out, in, iv, n); |
| 423 | break; |
| 424 | |
| 425 | case DES3_EEE_DECRYPT: |
| 426 | cbc_des3_eee_decrypt_loop(uctx->key, out, in, iv, n); |
| 427 | break; |
| 428 | #endif |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | static int des_cipher(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 433 | struct scatterlist *src, unsigned int nbytes, u32 extra_flags, enum des_ops op) |
| 434 | { |
| 435 | struct ubicom32_des_ctx *uctx = crypto_blkcipher_ctx(desc->tfm); |
| 436 | int ret; |
| 437 | |
| 438 | struct blkcipher_walk walk; |
| 439 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 440 | ret = blkcipher_walk_virt(desc, &walk); |
| 441 | if (ret) { |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | hw_crypto_lock(); |
| 446 | hw_crypto_check(); |
| 447 | |
| 448 | while ((nbytes = walk.nbytes)) { |
| 449 | /* only use complete blocks */ |
| 450 | unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1); |
| 451 | u8 *out = walk.dst.virt.addr; |
| 452 | u8 *in = walk.src.virt.addr; |
| 453 | |
| 454 | /* finish n/16 blocks */ |
| 455 | if (extra_flags & SEC_CBC_SET) { |
| 456 | cbc_des_cipher_n(uctx, op, out, in, walk.iv, n); |
| 457 | } else { |
| 458 | ecb_des_cipher_n(uctx, op, out, in, n); |
| 459 | } |
| 460 | |
| 461 | nbytes &= DES_BLOCK_SIZE - 1; |
| 462 | ret = blkcipher_walk_done(desc, &walk, nbytes); |
| 463 | } |
| 464 | |
| 465 | hw_crypto_unlock(); |
| 466 | return ret; |
| 467 | } |
| 468 | |
| 469 | static int ecb_des_encrypt(struct blkcipher_desc *desc, |
| 470 | struct scatterlist *dst, struct scatterlist *src, |
| 471 | unsigned int nbytes) |
| 472 | { |
| 473 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_NONE, DES_ENCRYPT); |
| 474 | } |
| 475 | |
| 476 | static int ecb_des_decrypt(struct blkcipher_desc *desc, |
| 477 | struct scatterlist *dst, struct scatterlist *src, |
| 478 | unsigned int nbytes) |
| 479 | { |
| 480 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_NONE, DES_DECRYPT); |
| 481 | } |
| 482 | |
| 483 | static struct crypto_alg ecb_des_alg = { |
| 484 | .cra_name = "ecb(des)", |
| 485 | .cra_driver_name = "ecb-des-ubicom32", |
| 486 | .cra_priority = CRYPTO_UBICOM32_COMPOSITE_PRIORITY, |
| 487 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 488 | .cra_blocksize = DES_BLOCK_SIZE, |
| 489 | .cra_ctxsize = sizeof(struct ubicom32_des_ctx), |
| 490 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 491 | .cra_type = &crypto_blkcipher_type, |
| 492 | .cra_module = THIS_MODULE, |
| 493 | .cra_list = LIST_HEAD_INIT(ecb_des_alg.cra_list), |
| 494 | .cra_u = { |
| 495 | .blkcipher = { |
| 496 | .min_keysize = DES_KEY_SIZE, |
| 497 | .max_keysize = DES_KEY_SIZE, |
| 498 | .setkey = des_setkey, |
| 499 | .encrypt = ecb_des_encrypt, |
| 500 | .decrypt = ecb_des_decrypt, |
| 501 | } |
| 502 | } |
| 503 | }; |
| 504 | |
| 505 | static int cbc_des_encrypt(struct blkcipher_desc *desc, |
| 506 | struct scatterlist *dst, struct scatterlist *src, |
| 507 | unsigned int nbytes) |
| 508 | { |
| 509 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_SET, DES_ENCRYPT); |
| 510 | } |
| 511 | |
| 512 | static int cbc_des_decrypt(struct blkcipher_desc *desc, |
| 513 | struct scatterlist *dst, struct scatterlist *src, |
| 514 | unsigned int nbytes) |
| 515 | { |
| 516 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_SET, DES_DECRYPT); |
| 517 | } |
| 518 | |
| 519 | static struct crypto_alg cbc_des_alg = { |
| 520 | .cra_name = "cbc(des)", |
| 521 | .cra_driver_name = "cbc-des-ubicom32", |
| 522 | .cra_priority = CRYPTO_UBICOM32_COMPOSITE_PRIORITY, |
| 523 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 524 | .cra_blocksize = DES_BLOCK_SIZE, |
| 525 | .cra_ctxsize = sizeof(struct ubicom32_des_ctx), |
| 526 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 527 | .cra_type = &crypto_blkcipher_type, |
| 528 | .cra_module = THIS_MODULE, |
| 529 | .cra_list = LIST_HEAD_INIT(cbc_des_alg.cra_list), |
| 530 | .cra_u = { |
| 531 | .blkcipher = { |
| 532 | .min_keysize = DES_KEY_SIZE, |
| 533 | .max_keysize = DES_KEY_SIZE, |
| 534 | .ivsize = DES_BLOCK_SIZE, |
| 535 | .setkey = des_setkey, |
| 536 | .encrypt = cbc_des_encrypt, |
| 537 | .decrypt = cbc_des_decrypt, |
| 538 | } |
| 539 | } |
| 540 | }; |
| 541 | |
| 542 | /* |
| 543 | * RFC2451: |
| 544 | * |
| 545 | * For DES-EDE3, there is no known need to reject weak or |
| 546 | * complementation keys. Any weakness is obviated by the use of |
| 547 | * multiple keys. |
| 548 | * |
| 549 | * However, if the first two or last two independent 64-bit keys are |
| 550 | * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the |
| 551 | * same as DES. Implementers MUST reject keys that exhibit this |
| 552 | * property. |
| 553 | * |
| 554 | */ |
| 555 | static int des3_192_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 556 | unsigned int keylen) |
| 557 | { |
| 558 | int i, ret; |
| 559 | struct ubicom32_des_ctx *dctx = crypto_tfm_ctx(tfm); |
| 560 | const u8 *temp_key = key; |
| 561 | u32 *flags = &tfm->crt_flags; |
| 562 | |
| 563 | if (!(memcmp(key, &key[DES_KEY_SIZE], DES_KEY_SIZE) && |
| 564 | memcmp(&key[DES_KEY_SIZE], &key[DES_KEY_SIZE * 2], |
| 565 | DES_KEY_SIZE))) { |
| 566 | |
| 567 | *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED; |
| 568 | return -EINVAL; |
| 569 | } |
| 570 | for (i = 0; i < 3; i++, temp_key += DES_KEY_SIZE) { |
| 571 | ret = crypto_des_check_key(temp_key, DES_KEY_SIZE, flags); |
| 572 | if (ret < 0) |
| 573 | return ret; |
| 574 | } |
| 575 | memcpy(dctx->key, key, keylen); |
| 576 | dctx->ctrl = SEC_ALG_DES; //hw 3DES not working yet |
| 577 | dctx->key_len = keylen; |
| 578 | return 0; |
| 579 | } |
| 580 | |
| 581 | static void des3_192_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 582 | { |
| 583 | struct ubicom32_des_ctx *uctx = crypto_tfm_ctx(tfm); |
| 584 | |
| 585 | hw_crypto_lock(); |
| 586 | hw_crypto_check(); |
| 587 | |
| 588 | des3_hw_ede_encrypt(uctx->key, dst, src); |
| 589 | |
| 590 | hw_crypto_unlock(); |
| 591 | } |
| 592 | |
| 593 | static void des3_192_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 594 | { |
| 595 | struct ubicom32_des_ctx *uctx = crypto_tfm_ctx(tfm); |
| 596 | |
| 597 | hw_crypto_lock(); |
| 598 | hw_crypto_check(); |
| 599 | |
| 600 | des3_hw_ede_decrypt(uctx->key, dst, src); |
| 601 | |
| 602 | hw_crypto_unlock(); |
| 603 | } |
| 604 | |
| 605 | static struct crypto_alg des3_192_alg = { |
| 606 | .cra_name = "des3_ede", |
| 607 | .cra_driver_name = "des3_ede-ubicom32", |
| 608 | .cra_priority = CRYPTO_UBICOM32_PRIORITY, |
| 609 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 610 | .cra_blocksize = DES3_192_BLOCK_SIZE, |
| 611 | .cra_ctxsize = sizeof(struct ubicom32_des_ctx), |
| 612 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 613 | .cra_module = THIS_MODULE, |
| 614 | .cra_list = LIST_HEAD_INIT(des3_192_alg.cra_list), |
| 615 | .cra_u = { |
| 616 | .cipher = { |
| 617 | .cia_min_keysize = DES3_192_KEY_SIZE, |
| 618 | .cia_max_keysize = DES3_192_KEY_SIZE, |
| 619 | .cia_setkey = des3_192_setkey, |
| 620 | .cia_encrypt = des3_192_encrypt, |
| 621 | .cia_decrypt = des3_192_decrypt, |
| 622 | } |
| 623 | } |
| 624 | }; |
| 625 | |
| 626 | static int ecb_des3_192_encrypt(struct blkcipher_desc *desc, |
| 627 | struct scatterlist *dst, |
| 628 | struct scatterlist *src, unsigned int nbytes) |
| 629 | { |
| 630 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_NONE, DES3_EDE_ENCRYPT); |
| 631 | } |
| 632 | |
| 633 | static int ecb_des3_192_decrypt(struct blkcipher_desc *desc, |
| 634 | struct scatterlist *dst, |
| 635 | struct scatterlist *src, unsigned int nbytes) |
| 636 | { |
| 637 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_NONE, DES3_EDE_DECRYPT); |
| 638 | } |
| 639 | |
| 640 | static struct crypto_alg ecb_des3_192_alg = { |
| 641 | .cra_name = "ecb(des3_ede)", |
| 642 | .cra_driver_name = "ecb-des3_ede-ubicom32", |
| 643 | .cra_priority = CRYPTO_UBICOM32_COMPOSITE_PRIORITY, |
| 644 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 645 | .cra_blocksize = DES3_192_BLOCK_SIZE, |
| 646 | .cra_ctxsize = sizeof(struct ubicom32_des_ctx), |
| 647 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 648 | .cra_type = &crypto_blkcipher_type, |
| 649 | .cra_module = THIS_MODULE, |
| 650 | .cra_list = LIST_HEAD_INIT( |
| 651 | ecb_des3_192_alg.cra_list), |
| 652 | .cra_u = { |
| 653 | .blkcipher = { |
| 654 | .min_keysize = DES3_192_KEY_SIZE, |
| 655 | .max_keysize = DES3_192_KEY_SIZE, |
| 656 | .setkey = des3_192_setkey, |
| 657 | .encrypt = ecb_des3_192_encrypt, |
| 658 | .decrypt = ecb_des3_192_decrypt, |
| 659 | } |
| 660 | } |
| 661 | }; |
| 662 | |
| 663 | static int cbc_des3_192_encrypt(struct blkcipher_desc *desc, |
| 664 | struct scatterlist *dst, |
| 665 | struct scatterlist *src, unsigned int nbytes) |
| 666 | { |
| 667 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_SET, DES3_EDE_ENCRYPT); |
| 668 | } |
| 669 | |
| 670 | static int cbc_des3_192_decrypt(struct blkcipher_desc *desc, |
| 671 | struct scatterlist *dst, |
| 672 | struct scatterlist *src, unsigned int nbytes) |
| 673 | { |
| 674 | return des_cipher(desc, dst, src, nbytes, SEC_CBC_SET, DES3_EDE_DECRYPT); |
| 675 | } |
| 676 | |
| 677 | static struct crypto_alg cbc_des3_192_alg = { |
| 678 | .cra_name = "cbc(des3_ede)", |
| 679 | .cra_driver_name = "cbc-des3_ede-ubicom32", |
| 680 | .cra_priority = CRYPTO_UBICOM32_COMPOSITE_PRIORITY, |
| 681 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 682 | .cra_blocksize = DES3_192_BLOCK_SIZE, |
| 683 | .cra_ctxsize = sizeof(struct ubicom32_des_ctx), |
| 684 | .cra_alignmask = CRYPTO_UBICOM32_ALIGNMENT - 1, |
| 685 | .cra_type = &crypto_blkcipher_type, |
| 686 | .cra_module = THIS_MODULE, |
| 687 | .cra_list = LIST_HEAD_INIT( |
| 688 | cbc_des3_192_alg.cra_list), |
| 689 | .cra_u = { |
| 690 | .blkcipher = { |
| 691 | .min_keysize = DES3_192_KEY_SIZE, |
| 692 | .max_keysize = DES3_192_KEY_SIZE, |
| 693 | .ivsize = DES3_192_BLOCK_SIZE, |
| 694 | .setkey = des3_192_setkey, |
| 695 | .encrypt = cbc_des3_192_encrypt, |
| 696 | .decrypt = cbc_des3_192_decrypt, |
| 697 | } |
| 698 | } |
| 699 | }; |
| 700 | |
| 701 | static int init(void) |
| 702 | { |
| 703 | int ret = 0; |
| 704 | |
| 705 | hw_crypto_init(); |
| 706 | |
| 707 | ret = crypto_register_alg(&des_alg); |
| 708 | if (ret) |
| 709 | goto des_err; |
| 710 | ret = crypto_register_alg(&ecb_des_alg); |
| 711 | if (ret) |
| 712 | goto ecb_des_err; |
| 713 | ret = crypto_register_alg(&cbc_des_alg); |
| 714 | if (ret) |
| 715 | goto cbc_des_err; |
| 716 | |
| 717 | ret = crypto_register_alg(&des3_192_alg); |
| 718 | if (ret) |
| 719 | goto des3_192_err; |
| 720 | ret = crypto_register_alg(&ecb_des3_192_alg); |
| 721 | if (ret) |
| 722 | goto ecb_des3_192_err; |
| 723 | ret = crypto_register_alg(&cbc_des3_192_alg); |
| 724 | if (ret) |
| 725 | goto cbc_des3_192_err; |
| 726 | |
| 727 | out: |
| 728 | return ret; |
| 729 | |
| 730 | cbc_des3_192_err: |
| 731 | crypto_unregister_alg(&ecb_des3_192_alg); |
| 732 | ecb_des3_192_err: |
| 733 | crypto_unregister_alg(&des3_192_alg); |
| 734 | des3_192_err: |
| 735 | crypto_unregister_alg(&cbc_des_alg); |
| 736 | cbc_des_err: |
| 737 | crypto_unregister_alg(&ecb_des_alg); |
| 738 | ecb_des_err: |
| 739 | crypto_unregister_alg(&des_alg); |
| 740 | des_err: |
| 741 | goto out; |
| 742 | } |
| 743 | |
| 744 | static void __exit fini(void) |
| 745 | { |
| 746 | crypto_unregister_alg(&cbc_des3_192_alg); |
| 747 | crypto_unregister_alg(&ecb_des3_192_alg); |
| 748 | crypto_unregister_alg(&des3_192_alg); |
| 749 | crypto_unregister_alg(&cbc_des_alg); |
| 750 | crypto_unregister_alg(&ecb_des_alg); |
| 751 | crypto_unregister_alg(&des_alg); |
| 752 | } |
| 753 | |
| 754 | module_init(init); |
| 755 | module_exit(fini); |
| 756 | |
| 757 | MODULE_ALIAS("des"); |
| 758 | MODULE_ALIAS("des3_ede"); |
| 759 | |
| 760 | MODULE_LICENSE("GPL"); |
| 761 | MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms"); |
| 762 | |
