Markus Stockhausen | 8a28a1a | 2015-02-22 10:00:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Glue code for AES implementation for SPE instructions (PPC) |
| 3 | * |
| 4 | * Based on generic implementation. The assembler module takes care |
| 5 | * about the SPE registers so it can run from interrupt context. |
| 6 | * |
| 7 | * Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.de> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the Free |
| 11 | * Software Foundation; either version 2 of the License, or (at your option) |
| 12 | * any later version. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <crypto/aes.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/crypto.h> |
| 22 | #include <asm/byteorder.h> |
| 23 | #include <asm/switch_to.h> |
| 24 | #include <crypto/algapi.h> |
| 25 | |
| 26 | /* |
| 27 | * MAX_BYTES defines the number of bytes that are allowed to be processed |
| 28 | * between preempt_disable() and preempt_enable(). e500 cores can issue two |
| 29 | * instructions per clock cycle using one 32/64 bit unit (SU1) and one 32 |
| 30 | * bit unit (SU2). One of these can be a memory access that is executed via |
| 31 | * a single load and store unit (LSU). XTS-AES-256 takes ~780 operations per |
| 32 | * 16 byte block block or 25 cycles per byte. Thus 768 bytes of input data |
| 33 | * will need an estimated maximum of 20,000 cycles. Headroom for cache misses |
| 34 | * included. Even with the low end model clocked at 667 MHz this equals to a |
Adam Buchbinder | 446957b | 2016-02-24 10:51:11 -0800 | [diff] [blame^] | 35 | * critical time window of less than 30us. The value has been chosen to |
Markus Stockhausen | 8a28a1a | 2015-02-22 10:00:05 +0100 | [diff] [blame] | 36 | * process a 512 byte disk block in one or a large 1400 bytes IPsec network |
| 37 | * packet in two runs. |
| 38 | * |
| 39 | */ |
| 40 | #define MAX_BYTES 768 |
| 41 | |
| 42 | struct ppc_aes_ctx { |
| 43 | u32 key_enc[AES_MAX_KEYLENGTH_U32]; |
| 44 | u32 key_dec[AES_MAX_KEYLENGTH_U32]; |
| 45 | u32 rounds; |
| 46 | }; |
| 47 | |
| 48 | struct ppc_xts_ctx { |
| 49 | u32 key_enc[AES_MAX_KEYLENGTH_U32]; |
| 50 | u32 key_dec[AES_MAX_KEYLENGTH_U32]; |
| 51 | u32 key_twk[AES_MAX_KEYLENGTH_U32]; |
| 52 | u32 rounds; |
| 53 | }; |
| 54 | |
| 55 | extern void ppc_encrypt_aes(u8 *out, const u8 *in, u32 *key_enc, u32 rounds); |
| 56 | extern void ppc_decrypt_aes(u8 *out, const u8 *in, u32 *key_dec, u32 rounds); |
| 57 | extern void ppc_encrypt_ecb(u8 *out, const u8 *in, u32 *key_enc, u32 rounds, |
| 58 | u32 bytes); |
| 59 | extern void ppc_decrypt_ecb(u8 *out, const u8 *in, u32 *key_dec, u32 rounds, |
| 60 | u32 bytes); |
| 61 | extern void ppc_encrypt_cbc(u8 *out, const u8 *in, u32 *key_enc, u32 rounds, |
| 62 | u32 bytes, u8 *iv); |
| 63 | extern void ppc_decrypt_cbc(u8 *out, const u8 *in, u32 *key_dec, u32 rounds, |
| 64 | u32 bytes, u8 *iv); |
| 65 | extern void ppc_crypt_ctr (u8 *out, const u8 *in, u32 *key_enc, u32 rounds, |
| 66 | u32 bytes, u8 *iv); |
| 67 | extern void ppc_encrypt_xts(u8 *out, const u8 *in, u32 *key_enc, u32 rounds, |
| 68 | u32 bytes, u8 *iv, u32 *key_twk); |
| 69 | extern void ppc_decrypt_xts(u8 *out, const u8 *in, u32 *key_dec, u32 rounds, |
| 70 | u32 bytes, u8 *iv, u32 *key_twk); |
| 71 | |
| 72 | extern void ppc_expand_key_128(u32 *key_enc, const u8 *key); |
| 73 | extern void ppc_expand_key_192(u32 *key_enc, const u8 *key); |
| 74 | extern void ppc_expand_key_256(u32 *key_enc, const u8 *key); |
| 75 | |
| 76 | extern void ppc_generate_decrypt_key(u32 *key_dec,u32 *key_enc, |
| 77 | unsigned int key_len); |
| 78 | |
| 79 | static void spe_begin(void) |
| 80 | { |
| 81 | /* disable preemption and save users SPE registers if required */ |
| 82 | preempt_disable(); |
| 83 | enable_kernel_spe(); |
| 84 | } |
| 85 | |
| 86 | static void spe_end(void) |
| 87 | { |
Anton Blanchard | dc4fbba | 2015-10-29 11:44:05 +1100 | [diff] [blame] | 88 | disable_kernel_spe(); |
Markus Stockhausen | 8a28a1a | 2015-02-22 10:00:05 +0100 | [diff] [blame] | 89 | /* reenable preemption */ |
| 90 | preempt_enable(); |
| 91 | } |
| 92 | |
| 93 | static int ppc_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key, |
| 94 | unsigned int key_len) |
| 95 | { |
| 96 | struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 97 | |
| 98 | if (key_len != AES_KEYSIZE_128 && |
| 99 | key_len != AES_KEYSIZE_192 && |
| 100 | key_len != AES_KEYSIZE_256) { |
| 101 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 102 | return -EINVAL; |
| 103 | } |
| 104 | |
| 105 | switch (key_len) { |
| 106 | case AES_KEYSIZE_128: |
| 107 | ctx->rounds = 4; |
| 108 | ppc_expand_key_128(ctx->key_enc, in_key); |
| 109 | break; |
| 110 | case AES_KEYSIZE_192: |
| 111 | ctx->rounds = 5; |
| 112 | ppc_expand_key_192(ctx->key_enc, in_key); |
| 113 | break; |
| 114 | case AES_KEYSIZE_256: |
| 115 | ctx->rounds = 6; |
| 116 | ppc_expand_key_256(ctx->key_enc, in_key); |
| 117 | break; |
| 118 | } |
| 119 | |
| 120 | ppc_generate_decrypt_key(ctx->key_dec, ctx->key_enc, key_len); |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static int ppc_xts_setkey(struct crypto_tfm *tfm, const u8 *in_key, |
| 126 | unsigned int key_len) |
| 127 | { |
| 128 | struct ppc_xts_ctx *ctx = crypto_tfm_ctx(tfm); |
| 129 | |
| 130 | key_len >>= 1; |
| 131 | |
| 132 | if (key_len != AES_KEYSIZE_128 && |
| 133 | key_len != AES_KEYSIZE_192 && |
| 134 | key_len != AES_KEYSIZE_256) { |
| 135 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 136 | return -EINVAL; |
| 137 | } |
| 138 | |
| 139 | switch (key_len) { |
| 140 | case AES_KEYSIZE_128: |
| 141 | ctx->rounds = 4; |
| 142 | ppc_expand_key_128(ctx->key_enc, in_key); |
| 143 | ppc_expand_key_128(ctx->key_twk, in_key + AES_KEYSIZE_128); |
| 144 | break; |
| 145 | case AES_KEYSIZE_192: |
| 146 | ctx->rounds = 5; |
| 147 | ppc_expand_key_192(ctx->key_enc, in_key); |
| 148 | ppc_expand_key_192(ctx->key_twk, in_key + AES_KEYSIZE_192); |
| 149 | break; |
| 150 | case AES_KEYSIZE_256: |
| 151 | ctx->rounds = 6; |
| 152 | ppc_expand_key_256(ctx->key_enc, in_key); |
| 153 | ppc_expand_key_256(ctx->key_twk, in_key + AES_KEYSIZE_256); |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | ppc_generate_decrypt_key(ctx->key_dec, ctx->key_enc, key_len); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static void ppc_aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| 163 | { |
| 164 | struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 165 | |
| 166 | spe_begin(); |
| 167 | ppc_encrypt_aes(out, in, ctx->key_enc, ctx->rounds); |
| 168 | spe_end(); |
| 169 | } |
| 170 | |
| 171 | static void ppc_aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| 172 | { |
| 173 | struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 174 | |
| 175 | spe_begin(); |
| 176 | ppc_decrypt_aes(out, in, ctx->key_dec, ctx->rounds); |
| 177 | spe_end(); |
| 178 | } |
| 179 | |
| 180 | static int ppc_ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 181 | struct scatterlist *src, unsigned int nbytes) |
| 182 | { |
| 183 | struct ppc_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 184 | struct blkcipher_walk walk; |
| 185 | unsigned int ubytes; |
| 186 | int err; |
| 187 | |
| 188 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 189 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 190 | err = blkcipher_walk_virt(desc, &walk); |
| 191 | |
| 192 | while ((nbytes = walk.nbytes)) { |
| 193 | ubytes = nbytes > MAX_BYTES ? |
| 194 | nbytes - MAX_BYTES : nbytes & (AES_BLOCK_SIZE - 1); |
| 195 | nbytes -= ubytes; |
| 196 | |
| 197 | spe_begin(); |
| 198 | ppc_encrypt_ecb(walk.dst.virt.addr, walk.src.virt.addr, |
| 199 | ctx->key_enc, ctx->rounds, nbytes); |
| 200 | spe_end(); |
| 201 | |
| 202 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 203 | } |
| 204 | |
| 205 | return err; |
| 206 | } |
| 207 | |
| 208 | static int ppc_ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 209 | struct scatterlist *src, unsigned int nbytes) |
| 210 | { |
| 211 | struct ppc_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 212 | struct blkcipher_walk walk; |
| 213 | unsigned int ubytes; |
| 214 | int err; |
| 215 | |
| 216 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 217 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 218 | err = blkcipher_walk_virt(desc, &walk); |
| 219 | |
| 220 | while ((nbytes = walk.nbytes)) { |
| 221 | ubytes = nbytes > MAX_BYTES ? |
| 222 | nbytes - MAX_BYTES : nbytes & (AES_BLOCK_SIZE - 1); |
| 223 | nbytes -= ubytes; |
| 224 | |
| 225 | spe_begin(); |
| 226 | ppc_decrypt_ecb(walk.dst.virt.addr, walk.src.virt.addr, |
| 227 | ctx->key_dec, ctx->rounds, nbytes); |
| 228 | spe_end(); |
| 229 | |
| 230 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 231 | } |
| 232 | |
| 233 | return err; |
| 234 | } |
| 235 | |
| 236 | static int ppc_cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 237 | struct scatterlist *src, unsigned int nbytes) |
| 238 | { |
| 239 | struct ppc_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 240 | struct blkcipher_walk walk; |
| 241 | unsigned int ubytes; |
| 242 | int err; |
| 243 | |
| 244 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 245 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 246 | err = blkcipher_walk_virt(desc, &walk); |
| 247 | |
| 248 | while ((nbytes = walk.nbytes)) { |
| 249 | ubytes = nbytes > MAX_BYTES ? |
| 250 | nbytes - MAX_BYTES : nbytes & (AES_BLOCK_SIZE - 1); |
| 251 | nbytes -= ubytes; |
| 252 | |
| 253 | spe_begin(); |
| 254 | ppc_encrypt_cbc(walk.dst.virt.addr, walk.src.virt.addr, |
| 255 | ctx->key_enc, ctx->rounds, nbytes, walk.iv); |
| 256 | spe_end(); |
| 257 | |
| 258 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 259 | } |
| 260 | |
| 261 | return err; |
| 262 | } |
| 263 | |
| 264 | static int ppc_cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 265 | struct scatterlist *src, unsigned int nbytes) |
| 266 | { |
| 267 | struct ppc_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 268 | struct blkcipher_walk walk; |
| 269 | unsigned int ubytes; |
| 270 | int err; |
| 271 | |
| 272 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 273 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 274 | err = blkcipher_walk_virt(desc, &walk); |
| 275 | |
| 276 | while ((nbytes = walk.nbytes)) { |
| 277 | ubytes = nbytes > MAX_BYTES ? |
| 278 | nbytes - MAX_BYTES : nbytes & (AES_BLOCK_SIZE - 1); |
| 279 | nbytes -= ubytes; |
| 280 | |
| 281 | spe_begin(); |
| 282 | ppc_decrypt_cbc(walk.dst.virt.addr, walk.src.virt.addr, |
| 283 | ctx->key_dec, ctx->rounds, nbytes, walk.iv); |
| 284 | spe_end(); |
| 285 | |
| 286 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 287 | } |
| 288 | |
| 289 | return err; |
| 290 | } |
| 291 | |
| 292 | static int ppc_ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 293 | struct scatterlist *src, unsigned int nbytes) |
| 294 | { |
| 295 | struct ppc_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 296 | struct blkcipher_walk walk; |
| 297 | unsigned int pbytes, ubytes; |
| 298 | int err; |
| 299 | |
| 300 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 301 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 302 | err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); |
| 303 | |
| 304 | while ((pbytes = walk.nbytes)) { |
| 305 | pbytes = pbytes > MAX_BYTES ? MAX_BYTES : pbytes; |
| 306 | pbytes = pbytes == nbytes ? |
| 307 | nbytes : pbytes & ~(AES_BLOCK_SIZE - 1); |
| 308 | ubytes = walk.nbytes - pbytes; |
| 309 | |
| 310 | spe_begin(); |
| 311 | ppc_crypt_ctr(walk.dst.virt.addr, walk.src.virt.addr, |
| 312 | ctx->key_enc, ctx->rounds, pbytes , walk.iv); |
| 313 | spe_end(); |
| 314 | |
| 315 | nbytes -= pbytes; |
| 316 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 317 | } |
| 318 | |
| 319 | return err; |
| 320 | } |
| 321 | |
| 322 | static int ppc_xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 323 | struct scatterlist *src, unsigned int nbytes) |
| 324 | { |
| 325 | struct ppc_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 326 | struct blkcipher_walk walk; |
| 327 | unsigned int ubytes; |
| 328 | int err; |
| 329 | u32 *twk; |
| 330 | |
| 331 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 332 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 333 | err = blkcipher_walk_virt(desc, &walk); |
| 334 | twk = ctx->key_twk; |
| 335 | |
| 336 | while ((nbytes = walk.nbytes)) { |
| 337 | ubytes = nbytes > MAX_BYTES ? |
| 338 | nbytes - MAX_BYTES : nbytes & (AES_BLOCK_SIZE - 1); |
| 339 | nbytes -= ubytes; |
| 340 | |
| 341 | spe_begin(); |
| 342 | ppc_encrypt_xts(walk.dst.virt.addr, walk.src.virt.addr, |
| 343 | ctx->key_enc, ctx->rounds, nbytes, walk.iv, twk); |
| 344 | spe_end(); |
| 345 | |
| 346 | twk = NULL; |
| 347 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 348 | } |
| 349 | |
| 350 | return err; |
| 351 | } |
| 352 | |
| 353 | static int ppc_xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 354 | struct scatterlist *src, unsigned int nbytes) |
| 355 | { |
| 356 | struct ppc_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 357 | struct blkcipher_walk walk; |
| 358 | unsigned int ubytes; |
| 359 | int err; |
| 360 | u32 *twk; |
| 361 | |
| 362 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 363 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 364 | err = blkcipher_walk_virt(desc, &walk); |
| 365 | twk = ctx->key_twk; |
| 366 | |
| 367 | while ((nbytes = walk.nbytes)) { |
| 368 | ubytes = nbytes > MAX_BYTES ? |
| 369 | nbytes - MAX_BYTES : nbytes & (AES_BLOCK_SIZE - 1); |
| 370 | nbytes -= ubytes; |
| 371 | |
| 372 | spe_begin(); |
| 373 | ppc_decrypt_xts(walk.dst.virt.addr, walk.src.virt.addr, |
| 374 | ctx->key_dec, ctx->rounds, nbytes, walk.iv, twk); |
| 375 | spe_end(); |
| 376 | |
| 377 | twk = NULL; |
| 378 | err = blkcipher_walk_done(desc, &walk, ubytes); |
| 379 | } |
| 380 | |
| 381 | return err; |
| 382 | } |
| 383 | |
| 384 | /* |
| 385 | * Algorithm definitions. Disabling alignment (cra_alignmask=0) was chosen |
| 386 | * because the e500 platform can handle unaligned reads/writes very efficently. |
| 387 | * This improves IPsec thoughput by another few percent. Additionally we assume |
| 388 | * that AES context is always aligned to at least 8 bytes because it is created |
| 389 | * with kmalloc() in the crypto infrastructure |
| 390 | * |
| 391 | */ |
| 392 | static struct crypto_alg aes_algs[] = { { |
| 393 | .cra_name = "aes", |
| 394 | .cra_driver_name = "aes-ppc-spe", |
| 395 | .cra_priority = 300, |
| 396 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 397 | .cra_blocksize = AES_BLOCK_SIZE, |
| 398 | .cra_ctxsize = sizeof(struct ppc_aes_ctx), |
| 399 | .cra_alignmask = 0, |
| 400 | .cra_module = THIS_MODULE, |
| 401 | .cra_u = { |
| 402 | .cipher = { |
| 403 | .cia_min_keysize = AES_MIN_KEY_SIZE, |
| 404 | .cia_max_keysize = AES_MAX_KEY_SIZE, |
| 405 | .cia_setkey = ppc_aes_setkey, |
| 406 | .cia_encrypt = ppc_aes_encrypt, |
| 407 | .cia_decrypt = ppc_aes_decrypt |
| 408 | } |
| 409 | } |
| 410 | }, { |
| 411 | .cra_name = "ecb(aes)", |
| 412 | .cra_driver_name = "ecb-ppc-spe", |
| 413 | .cra_priority = 300, |
| 414 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 415 | .cra_blocksize = AES_BLOCK_SIZE, |
| 416 | .cra_ctxsize = sizeof(struct ppc_aes_ctx), |
| 417 | .cra_alignmask = 0, |
| 418 | .cra_type = &crypto_blkcipher_type, |
| 419 | .cra_module = THIS_MODULE, |
| 420 | .cra_u = { |
| 421 | .blkcipher = { |
| 422 | .min_keysize = AES_MIN_KEY_SIZE, |
| 423 | .max_keysize = AES_MAX_KEY_SIZE, |
| 424 | .ivsize = AES_BLOCK_SIZE, |
| 425 | .setkey = ppc_aes_setkey, |
| 426 | .encrypt = ppc_ecb_encrypt, |
| 427 | .decrypt = ppc_ecb_decrypt, |
| 428 | } |
| 429 | } |
| 430 | }, { |
| 431 | .cra_name = "cbc(aes)", |
| 432 | .cra_driver_name = "cbc-ppc-spe", |
| 433 | .cra_priority = 300, |
| 434 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 435 | .cra_blocksize = AES_BLOCK_SIZE, |
| 436 | .cra_ctxsize = sizeof(struct ppc_aes_ctx), |
| 437 | .cra_alignmask = 0, |
| 438 | .cra_type = &crypto_blkcipher_type, |
| 439 | .cra_module = THIS_MODULE, |
| 440 | .cra_u = { |
| 441 | .blkcipher = { |
| 442 | .min_keysize = AES_MIN_KEY_SIZE, |
| 443 | .max_keysize = AES_MAX_KEY_SIZE, |
| 444 | .ivsize = AES_BLOCK_SIZE, |
| 445 | .setkey = ppc_aes_setkey, |
| 446 | .encrypt = ppc_cbc_encrypt, |
| 447 | .decrypt = ppc_cbc_decrypt, |
| 448 | } |
| 449 | } |
| 450 | }, { |
| 451 | .cra_name = "ctr(aes)", |
| 452 | .cra_driver_name = "ctr-ppc-spe", |
| 453 | .cra_priority = 300, |
| 454 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 455 | .cra_blocksize = 1, |
| 456 | .cra_ctxsize = sizeof(struct ppc_aes_ctx), |
| 457 | .cra_alignmask = 0, |
| 458 | .cra_type = &crypto_blkcipher_type, |
| 459 | .cra_module = THIS_MODULE, |
| 460 | .cra_u = { |
| 461 | .blkcipher = { |
| 462 | .min_keysize = AES_MIN_KEY_SIZE, |
| 463 | .max_keysize = AES_MAX_KEY_SIZE, |
| 464 | .ivsize = AES_BLOCK_SIZE, |
| 465 | .setkey = ppc_aes_setkey, |
| 466 | .encrypt = ppc_ctr_crypt, |
| 467 | .decrypt = ppc_ctr_crypt, |
| 468 | } |
| 469 | } |
| 470 | }, { |
| 471 | .cra_name = "xts(aes)", |
| 472 | .cra_driver_name = "xts-ppc-spe", |
| 473 | .cra_priority = 300, |
| 474 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 475 | .cra_blocksize = AES_BLOCK_SIZE, |
| 476 | .cra_ctxsize = sizeof(struct ppc_xts_ctx), |
| 477 | .cra_alignmask = 0, |
| 478 | .cra_type = &crypto_blkcipher_type, |
| 479 | .cra_module = THIS_MODULE, |
| 480 | .cra_u = { |
| 481 | .blkcipher = { |
| 482 | .min_keysize = AES_MIN_KEY_SIZE * 2, |
| 483 | .max_keysize = AES_MAX_KEY_SIZE * 2, |
| 484 | .ivsize = AES_BLOCK_SIZE, |
| 485 | .setkey = ppc_xts_setkey, |
| 486 | .encrypt = ppc_xts_encrypt, |
| 487 | .decrypt = ppc_xts_decrypt, |
| 488 | } |
| 489 | } |
| 490 | } }; |
| 491 | |
| 492 | static int __init ppc_aes_mod_init(void) |
| 493 | { |
| 494 | return crypto_register_algs(aes_algs, ARRAY_SIZE(aes_algs)); |
| 495 | } |
| 496 | |
| 497 | static void __exit ppc_aes_mod_fini(void) |
| 498 | { |
| 499 | crypto_unregister_algs(aes_algs, ARRAY_SIZE(aes_algs)); |
| 500 | } |
| 501 | |
| 502 | module_init(ppc_aes_mod_init); |
| 503 | module_exit(ppc_aes_mod_fini); |
| 504 | |
| 505 | MODULE_LICENSE("GPL"); |
| 506 | MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS, SPE optimized"); |
| 507 | |
| 508 | MODULE_ALIAS_CRYPTO("aes"); |
| 509 | MODULE_ALIAS_CRYPTO("ecb(aes)"); |
| 510 | MODULE_ALIAS_CRYPTO("cbc(aes)"); |
| 511 | MODULE_ALIAS_CRYPTO("ctr(aes)"); |
| 512 | MODULE_ALIAS_CRYPTO("xts(aes)"); |
| 513 | MODULE_ALIAS_CRYPTO("aes-ppc-spe"); |