Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 2 | /* |
Ingo Molnar | a97673a | 2018-12-03 10:47:34 +0100 | [diff] [blame] | 3 | * Glue Code for the AVX assembler implementation of the Cast5 Cipher |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 2012 Johannes Goetzfried |
| 6 | * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 7 | */ |
| 8 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 9 | #include <asm/crypto/glue_helper.h> |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 10 | #include <crypto/algapi.h> |
| 11 | #include <crypto/cast5.h> |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 12 | #include <crypto/internal/simd.h> |
| 13 | #include <linux/crypto.h> |
| 14 | #include <linux/err.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/types.h> |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 17 | |
| 18 | #define CAST5_PARALLEL_BLOCKS 16 |
| 19 | |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 20 | asmlinkage void cast5_ecb_enc_16way(struct cast5_ctx *ctx, u8 *dst, |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 21 | const u8 *src); |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 22 | asmlinkage void cast5_ecb_dec_16way(struct cast5_ctx *ctx, u8 *dst, |
| 23 | const u8 *src); |
| 24 | asmlinkage void cast5_cbc_dec_16way(struct cast5_ctx *ctx, u8 *dst, |
| 25 | const u8 *src); |
| 26 | asmlinkage void cast5_ctr_16way(struct cast5_ctx *ctx, u8 *dst, const u8 *src, |
| 27 | __be64 *iv); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 28 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 29 | static int cast5_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key, |
| 30 | unsigned int keylen) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 31 | { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 32 | return cast5_setkey(&tfm->base, key, keylen); |
| 33 | } |
| 34 | |
| 35 | static inline bool cast5_fpu_begin(bool fpu_enabled, struct skcipher_walk *walk, |
| 36 | unsigned int nbytes) |
| 37 | { |
Eric Biggers | 75d8a55 | 2018-02-19 23:48:27 -0800 | [diff] [blame] | 38 | return glue_fpu_begin(CAST5_BLOCK_SIZE, CAST5_PARALLEL_BLOCKS, |
| 39 | walk, fpu_enabled, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | static inline void cast5_fpu_end(bool fpu_enabled) |
| 43 | { |
| 44 | return glue_fpu_end(fpu_enabled); |
| 45 | } |
| 46 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 47 | static int ecb_crypt(struct skcipher_request *req, bool enc) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 48 | { |
| 49 | bool fpu_enabled = false; |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 50 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| 51 | struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm); |
| 52 | struct skcipher_walk walk; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 53 | const unsigned int bsize = CAST5_BLOCK_SIZE; |
| 54 | unsigned int nbytes; |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 55 | void (*fn)(struct cast5_ctx *ctx, u8 *dst, const u8 *src); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 56 | int err; |
| 57 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 58 | err = skcipher_walk_virt(&walk, req, false); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 59 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 60 | while ((nbytes = walk.nbytes)) { |
| 61 | u8 *wsrc = walk.src.virt.addr; |
| 62 | u8 *wdst = walk.dst.virt.addr; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 63 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 64 | fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 65 | |
| 66 | /* Process multi-block batch */ |
| 67 | if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) { |
Eric Biggers | 8f461b1 | 2018-02-19 23:48:12 -0800 | [diff] [blame] | 68 | fn = (enc) ? cast5_ecb_enc_16way : cast5_ecb_dec_16way; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 69 | do { |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 70 | fn(ctx, wdst, wsrc); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 71 | |
| 72 | wsrc += bsize * CAST5_PARALLEL_BLOCKS; |
| 73 | wdst += bsize * CAST5_PARALLEL_BLOCKS; |
| 74 | nbytes -= bsize * CAST5_PARALLEL_BLOCKS; |
| 75 | } while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS); |
| 76 | |
| 77 | if (nbytes < bsize) |
| 78 | goto done; |
| 79 | } |
| 80 | |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 81 | fn = (enc) ? __cast5_encrypt : __cast5_decrypt; |
| 82 | |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 83 | /* Handle leftovers */ |
| 84 | do { |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 85 | fn(ctx, wdst, wsrc); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 86 | |
| 87 | wsrc += bsize; |
| 88 | wdst += bsize; |
| 89 | nbytes -= bsize; |
| 90 | } while (nbytes >= bsize); |
| 91 | |
| 92 | done: |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 93 | err = skcipher_walk_done(&walk, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | cast5_fpu_end(fpu_enabled); |
| 97 | return err; |
| 98 | } |
| 99 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 100 | static int ecb_encrypt(struct skcipher_request *req) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 101 | { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 102 | return ecb_crypt(req, true); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 103 | } |
| 104 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 105 | static int ecb_decrypt(struct skcipher_request *req) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 106 | { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 107 | return ecb_crypt(req, false); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 108 | } |
| 109 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 110 | static int cbc_encrypt(struct skcipher_request *req) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 111 | { |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 112 | const unsigned int bsize = CAST5_BLOCK_SIZE; |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 113 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| 114 | struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm); |
| 115 | struct skcipher_walk walk; |
| 116 | unsigned int nbytes; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 117 | int err; |
| 118 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 119 | err = skcipher_walk_virt(&walk, req, false); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 120 | |
| 121 | while ((nbytes = walk.nbytes)) { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 122 | u64 *src = (u64 *)walk.src.virt.addr; |
| 123 | u64 *dst = (u64 *)walk.dst.virt.addr; |
| 124 | u64 *iv = (u64 *)walk.iv; |
| 125 | |
| 126 | do { |
| 127 | *dst = *src ^ *iv; |
| 128 | __cast5_encrypt(ctx, (u8 *)dst, (u8 *)dst); |
| 129 | iv = dst; |
| 130 | src++; |
| 131 | dst++; |
| 132 | nbytes -= bsize; |
| 133 | } while (nbytes >= bsize); |
| 134 | |
| 135 | *(u64 *)walk.iv = *iv; |
| 136 | err = skcipher_walk_done(&walk, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | return err; |
| 140 | } |
| 141 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 142 | static unsigned int __cbc_decrypt(struct cast5_ctx *ctx, |
| 143 | struct skcipher_walk *walk) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 144 | { |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 145 | const unsigned int bsize = CAST5_BLOCK_SIZE; |
| 146 | unsigned int nbytes = walk->nbytes; |
| 147 | u64 *src = (u64 *)walk->src.virt.addr; |
| 148 | u64 *dst = (u64 *)walk->dst.virt.addr; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 149 | u64 last_iv; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 150 | |
| 151 | /* Start of the last block. */ |
| 152 | src += nbytes / bsize - 1; |
| 153 | dst += nbytes / bsize - 1; |
| 154 | |
| 155 | last_iv = *src; |
| 156 | |
| 157 | /* Process multi-block batch */ |
| 158 | if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) { |
| 159 | do { |
| 160 | nbytes -= bsize * (CAST5_PARALLEL_BLOCKS - 1); |
| 161 | src -= CAST5_PARALLEL_BLOCKS - 1; |
| 162 | dst -= CAST5_PARALLEL_BLOCKS - 1; |
| 163 | |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 164 | cast5_cbc_dec_16way(ctx, (u8 *)dst, (u8 *)src); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 165 | |
| 166 | nbytes -= bsize; |
| 167 | if (nbytes < bsize) |
| 168 | goto done; |
| 169 | |
| 170 | *dst ^= *(src - 1); |
| 171 | src -= 1; |
| 172 | dst -= 1; |
| 173 | } while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | /* Handle leftovers */ |
| 177 | for (;;) { |
| 178 | __cast5_decrypt(ctx, (u8 *)dst, (u8 *)src); |
| 179 | |
| 180 | nbytes -= bsize; |
| 181 | if (nbytes < bsize) |
| 182 | break; |
| 183 | |
| 184 | *dst ^= *(src - 1); |
| 185 | src -= 1; |
| 186 | dst -= 1; |
| 187 | } |
| 188 | |
| 189 | done: |
| 190 | *dst ^= *(u64 *)walk->iv; |
| 191 | *(u64 *)walk->iv = last_iv; |
| 192 | |
| 193 | return nbytes; |
| 194 | } |
| 195 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 196 | static int cbc_decrypt(struct skcipher_request *req) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 197 | { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 198 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| 199 | struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 200 | bool fpu_enabled = false; |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 201 | struct skcipher_walk walk; |
| 202 | unsigned int nbytes; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 203 | int err; |
| 204 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 205 | err = skcipher_walk_virt(&walk, req, false); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 206 | |
| 207 | while ((nbytes = walk.nbytes)) { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 208 | fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes); |
| 209 | nbytes = __cbc_decrypt(ctx, &walk); |
| 210 | err = skcipher_walk_done(&walk, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | cast5_fpu_end(fpu_enabled); |
| 214 | return err; |
| 215 | } |
| 216 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 217 | static void ctr_crypt_final(struct skcipher_walk *walk, struct cast5_ctx *ctx) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 218 | { |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 219 | u8 *ctrblk = walk->iv; |
| 220 | u8 keystream[CAST5_BLOCK_SIZE]; |
| 221 | u8 *src = walk->src.virt.addr; |
| 222 | u8 *dst = walk->dst.virt.addr; |
| 223 | unsigned int nbytes = walk->nbytes; |
| 224 | |
| 225 | __cast5_encrypt(ctx, keystream, ctrblk); |
Ard Biesheuvel | 45fe93d | 2017-07-24 11:28:04 +0100 | [diff] [blame] | 226 | crypto_xor_cpy(dst, keystream, src, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 227 | |
| 228 | crypto_inc(ctrblk, CAST5_BLOCK_SIZE); |
| 229 | } |
| 230 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 231 | static unsigned int __ctr_crypt(struct skcipher_walk *walk, |
| 232 | struct cast5_ctx *ctx) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 233 | { |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 234 | const unsigned int bsize = CAST5_BLOCK_SIZE; |
| 235 | unsigned int nbytes = walk->nbytes; |
| 236 | u64 *src = (u64 *)walk->src.virt.addr; |
| 237 | u64 *dst = (u64 *)walk->dst.virt.addr; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 238 | |
| 239 | /* Process multi-block batch */ |
| 240 | if (nbytes >= bsize * CAST5_PARALLEL_BLOCKS) { |
| 241 | do { |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 242 | cast5_ctr_16way(ctx, (u8 *)dst, (u8 *)src, |
| 243 | (__be64 *)walk->iv); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 244 | |
| 245 | src += CAST5_PARALLEL_BLOCKS; |
| 246 | dst += CAST5_PARALLEL_BLOCKS; |
| 247 | nbytes -= bsize * CAST5_PARALLEL_BLOCKS; |
| 248 | } while (nbytes >= bsize * CAST5_PARALLEL_BLOCKS); |
| 249 | |
| 250 | if (nbytes < bsize) |
| 251 | goto done; |
| 252 | } |
| 253 | |
| 254 | /* Handle leftovers */ |
| 255 | do { |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 256 | u64 ctrblk; |
| 257 | |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 258 | if (dst != src) |
| 259 | *dst = *src; |
| 260 | |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 261 | ctrblk = *(u64 *)walk->iv; |
| 262 | be64_add_cpu((__be64 *)walk->iv, 1); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 263 | |
Jussi Kivilinna | c12ab20 | 2012-10-20 15:06:56 +0300 | [diff] [blame] | 264 | __cast5_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk); |
| 265 | *dst ^= ctrblk; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 266 | |
| 267 | src += 1; |
| 268 | dst += 1; |
| 269 | nbytes -= bsize; |
| 270 | } while (nbytes >= bsize); |
| 271 | |
| 272 | done: |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 273 | return nbytes; |
| 274 | } |
| 275 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 276 | static int ctr_crypt(struct skcipher_request *req) |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 277 | { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 278 | struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
| 279 | struct cast5_ctx *ctx = crypto_skcipher_ctx(tfm); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 280 | bool fpu_enabled = false; |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 281 | struct skcipher_walk walk; |
| 282 | unsigned int nbytes; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 283 | int err; |
| 284 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 285 | err = skcipher_walk_virt(&walk, req, false); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 286 | |
| 287 | while ((nbytes = walk.nbytes) >= CAST5_BLOCK_SIZE) { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 288 | fpu_enabled = cast5_fpu_begin(fpu_enabled, &walk, nbytes); |
| 289 | nbytes = __ctr_crypt(&walk, ctx); |
| 290 | err = skcipher_walk_done(&walk, nbytes); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | cast5_fpu_end(fpu_enabled); |
| 294 | |
| 295 | if (walk.nbytes) { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 296 | ctr_crypt_final(&walk, ctx); |
| 297 | err = skcipher_walk_done(&walk, 0); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | return err; |
| 301 | } |
| 302 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 303 | static struct skcipher_alg cast5_algs[] = { |
| 304 | { |
| 305 | .base.cra_name = "__ecb(cast5)", |
| 306 | .base.cra_driver_name = "__ecb-cast5-avx", |
| 307 | .base.cra_priority = 200, |
| 308 | .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| 309 | .base.cra_blocksize = CAST5_BLOCK_SIZE, |
| 310 | .base.cra_ctxsize = sizeof(struct cast5_ctx), |
| 311 | .base.cra_module = THIS_MODULE, |
| 312 | .min_keysize = CAST5_MIN_KEY_SIZE, |
| 313 | .max_keysize = CAST5_MAX_KEY_SIZE, |
| 314 | .setkey = cast5_setkey_skcipher, |
| 315 | .encrypt = ecb_encrypt, |
| 316 | .decrypt = ecb_decrypt, |
| 317 | }, { |
| 318 | .base.cra_name = "__cbc(cast5)", |
| 319 | .base.cra_driver_name = "__cbc-cast5-avx", |
| 320 | .base.cra_priority = 200, |
| 321 | .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| 322 | .base.cra_blocksize = CAST5_BLOCK_SIZE, |
| 323 | .base.cra_ctxsize = sizeof(struct cast5_ctx), |
| 324 | .base.cra_module = THIS_MODULE, |
| 325 | .min_keysize = CAST5_MIN_KEY_SIZE, |
| 326 | .max_keysize = CAST5_MAX_KEY_SIZE, |
| 327 | .ivsize = CAST5_BLOCK_SIZE, |
| 328 | .setkey = cast5_setkey_skcipher, |
| 329 | .encrypt = cbc_encrypt, |
| 330 | .decrypt = cbc_decrypt, |
| 331 | }, { |
| 332 | .base.cra_name = "__ctr(cast5)", |
| 333 | .base.cra_driver_name = "__ctr-cast5-avx", |
| 334 | .base.cra_priority = 200, |
| 335 | .base.cra_flags = CRYPTO_ALG_INTERNAL, |
| 336 | .base.cra_blocksize = 1, |
| 337 | .base.cra_ctxsize = sizeof(struct cast5_ctx), |
| 338 | .base.cra_module = THIS_MODULE, |
| 339 | .min_keysize = CAST5_MIN_KEY_SIZE, |
| 340 | .max_keysize = CAST5_MAX_KEY_SIZE, |
| 341 | .ivsize = CAST5_BLOCK_SIZE, |
| 342 | .chunksize = CAST5_BLOCK_SIZE, |
| 343 | .setkey = cast5_setkey_skcipher, |
| 344 | .encrypt = ctr_crypt, |
| 345 | .decrypt = ctr_crypt, |
| 346 | } |
| 347 | }; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 348 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 349 | static struct simd_skcipher_alg *cast5_simd_algs[ARRAY_SIZE(cast5_algs)]; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 350 | |
| 351 | static int __init cast5_init(void) |
| 352 | { |
Ingo Molnar | d5d34d9 | 2015-04-28 10:11:24 +0200 | [diff] [blame] | 353 | const char *feature_name; |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 354 | |
Dave Hansen | d91cab7 | 2015-09-02 16:31:26 -0700 | [diff] [blame] | 355 | if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, |
| 356 | &feature_name)) { |
Ingo Molnar | d5d34d9 | 2015-04-28 10:11:24 +0200 | [diff] [blame] | 357 | pr_info("CPU feature '%s' is not supported.\n", feature_name); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 358 | return -ENODEV; |
| 359 | } |
| 360 | |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 361 | return simd_register_skciphers_compat(cast5_algs, |
| 362 | ARRAY_SIZE(cast5_algs), |
| 363 | cast5_simd_algs); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | static void __exit cast5_exit(void) |
| 367 | { |
Eric Biggers | 1e63183 | 2018-02-19 23:48:13 -0800 | [diff] [blame] | 368 | simd_unregister_skciphers(cast5_algs, ARRAY_SIZE(cast5_algs), |
| 369 | cast5_simd_algs); |
Johannes Goetzfried | 4d6d6a2 | 2012-07-11 19:37:37 +0200 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | module_init(cast5_init); |
| 373 | module_exit(cast5_exit); |
| 374 | |
| 375 | MODULE_DESCRIPTION("Cast5 Cipher Algorithm, AVX optimized"); |
| 376 | MODULE_LICENSE("GPL"); |
Kees Cook | 5d26a10 | 2014-11-20 17:05:53 -0800 | [diff] [blame] | 377 | MODULE_ALIAS_CRYPTO("cast5"); |