Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Glue Code for AVX assembler versions of Serpent Cipher |
| 3 | * |
| 4 | * Copyright (C) 2012 Johannes Goetzfried |
| 5 | * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> |
| 6 | * |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 7 | * Copyright © 2011-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 22 | * USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/hardirq.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/crypto.h> |
| 30 | #include <linux/err.h> |
Ard Biesheuvel | 801201a | 2013-09-20 09:55:41 +0200 | [diff] [blame] | 31 | #include <crypto/ablk_helper.h> |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 32 | #include <crypto/algapi.h> |
| 33 | #include <crypto/serpent.h> |
| 34 | #include <crypto/cryptd.h> |
| 35 | #include <crypto/b128ops.h> |
| 36 | #include <crypto/ctr.h> |
| 37 | #include <crypto/lrw.h> |
| 38 | #include <crypto/xts.h> |
Ingo Molnar | c1c23f7 | 2015-04-28 10:11:24 +0200 | [diff] [blame] | 39 | #include <asm/fpu/api.h> |
Jussi Kivilinna | d4af0e9 | 2012-06-18 14:07:45 +0300 | [diff] [blame] | 40 | #include <asm/crypto/serpent-avx.h> |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 41 | #include <asm/crypto/glue_helper.h> |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 42 | |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 43 | /* 8-way parallel cipher functions */ |
| 44 | asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst, |
| 45 | const u8 *src); |
| 46 | EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx); |
| 47 | |
| 48 | asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst, |
| 49 | const u8 *src); |
| 50 | EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx); |
| 51 | |
| 52 | asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst, |
| 53 | const u8 *src); |
| 54 | EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx); |
| 55 | |
| 56 | asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx *ctx, u8 *dst, |
| 57 | const u8 *src, le128 *iv); |
| 58 | EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx); |
| 59 | |
| 60 | asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst, |
| 61 | const u8 *src, le128 *iv); |
| 62 | EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx); |
| 63 | |
| 64 | asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst, |
| 65 | const u8 *src, le128 *iv); |
| 66 | EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx); |
| 67 | |
| 68 | void __serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 69 | { |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 70 | be128 ctrblk; |
| 71 | |
Jussi Kivilinna | 5899098 | 2012-10-20 15:06:36 +0300 | [diff] [blame] | 72 | le128_to_be128(&ctrblk, iv); |
| 73 | le128_inc(iv); |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 74 | |
| 75 | __serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk); |
| 76 | u128_xor(dst, src, (u128 *)&ctrblk); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 77 | } |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 78 | EXPORT_SYMBOL_GPL(__serpent_crypt_ctr); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 79 | |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 80 | void serpent_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 81 | { |
| 82 | glue_xts_crypt_128bit_one(ctx, dst, src, iv, |
| 83 | GLUE_FUNC_CAST(__serpent_encrypt)); |
| 84 | } |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 85 | EXPORT_SYMBOL_GPL(serpent_xts_enc); |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 86 | |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 87 | void serpent_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv) |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 88 | { |
| 89 | glue_xts_crypt_128bit_one(ctx, dst, src, iv, |
| 90 | GLUE_FUNC_CAST(__serpent_decrypt)); |
| 91 | } |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 92 | EXPORT_SYMBOL_GPL(serpent_xts_dec); |
| 93 | |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 94 | |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 95 | static const struct common_glue_ctx serpent_enc = { |
| 96 | .num_funcs = 2, |
| 97 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, |
| 98 | |
| 99 | .funcs = { { |
| 100 | .num_blocks = SERPENT_PARALLEL_BLOCKS, |
Jussi Kivilinna | facd416 | 2012-10-20 15:06:51 +0300 | [diff] [blame] | 101 | .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) } |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 102 | }, { |
| 103 | .num_blocks = 1, |
| 104 | .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) } |
| 105 | } } |
| 106 | }; |
| 107 | |
| 108 | static const struct common_glue_ctx serpent_ctr = { |
| 109 | .num_funcs = 2, |
| 110 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, |
| 111 | |
| 112 | .funcs = { { |
| 113 | .num_blocks = SERPENT_PARALLEL_BLOCKS, |
Jussi Kivilinna | facd416 | 2012-10-20 15:06:51 +0300 | [diff] [blame] | 114 | .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) } |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 115 | }, { |
| 116 | .num_blocks = 1, |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 117 | .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) } |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 118 | } } |
| 119 | }; |
| 120 | |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 121 | static const struct common_glue_ctx serpent_enc_xts = { |
| 122 | .num_funcs = 2, |
| 123 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, |
| 124 | |
| 125 | .funcs = { { |
| 126 | .num_blocks = SERPENT_PARALLEL_BLOCKS, |
| 127 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) } |
| 128 | }, { |
| 129 | .num_blocks = 1, |
| 130 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) } |
| 131 | } } |
| 132 | }; |
| 133 | |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 134 | static const struct common_glue_ctx serpent_dec = { |
| 135 | .num_funcs = 2, |
| 136 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, |
| 137 | |
| 138 | .funcs = { { |
| 139 | .num_blocks = SERPENT_PARALLEL_BLOCKS, |
Jussi Kivilinna | facd416 | 2012-10-20 15:06:51 +0300 | [diff] [blame] | 140 | .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) } |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 141 | }, { |
| 142 | .num_blocks = 1, |
| 143 | .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) } |
| 144 | } } |
| 145 | }; |
| 146 | |
| 147 | static const struct common_glue_ctx serpent_dec_cbc = { |
| 148 | .num_funcs = 2, |
| 149 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, |
| 150 | |
| 151 | .funcs = { { |
| 152 | .num_blocks = SERPENT_PARALLEL_BLOCKS, |
Jussi Kivilinna | facd416 | 2012-10-20 15:06:51 +0300 | [diff] [blame] | 153 | .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) } |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 154 | }, { |
| 155 | .num_blocks = 1, |
| 156 | .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) } |
| 157 | } } |
| 158 | }; |
| 159 | |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 160 | static const struct common_glue_ctx serpent_dec_xts = { |
| 161 | .num_funcs = 2, |
| 162 | .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS, |
| 163 | |
| 164 | .funcs = { { |
| 165 | .num_blocks = SERPENT_PARALLEL_BLOCKS, |
| 166 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) } |
| 167 | }, { |
| 168 | .num_blocks = 1, |
| 169 | .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) } |
| 170 | } } |
| 171 | }; |
| 172 | |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 173 | static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 174 | struct scatterlist *src, unsigned int nbytes) |
| 175 | { |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 176 | return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 180 | struct scatterlist *src, unsigned int nbytes) |
| 181 | { |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 182 | return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 186 | struct scatterlist *src, unsigned int nbytes) |
| 187 | { |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 188 | return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc, |
| 189 | dst, src, nbytes); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 193 | struct scatterlist *src, unsigned int nbytes) |
| 194 | { |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 195 | return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src, |
| 196 | nbytes); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 200 | struct scatterlist *src, unsigned int nbytes) |
| 201 | { |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 202 | return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes); |
| 203 | } |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 204 | |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 205 | static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes) |
| 206 | { |
| 207 | return glue_fpu_begin(SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS, |
| 208 | NULL, fpu_enabled, nbytes); |
| 209 | } |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 210 | |
Jussi Kivilinna | 1d0debb | 2012-06-18 14:07:24 +0300 | [diff] [blame] | 211 | static inline void serpent_fpu_end(bool fpu_enabled) |
| 212 | { |
| 213 | glue_fpu_end(fpu_enabled); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | struct crypt_priv { |
| 217 | struct serpent_ctx *ctx; |
| 218 | bool fpu_enabled; |
| 219 | }; |
| 220 | |
| 221 | static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |
| 222 | { |
| 223 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 224 | struct crypt_priv *ctx = priv; |
| 225 | int i; |
| 226 | |
| 227 | ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); |
| 228 | |
| 229 | if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) { |
Jussi Kivilinna | facd416 | 2012-10-20 15:06:51 +0300 | [diff] [blame] | 230 | serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 231 | return; |
| 232 | } |
| 233 | |
| 234 | for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
| 235 | __serpent_encrypt(ctx->ctx, srcdst, srcdst); |
| 236 | } |
| 237 | |
| 238 | static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |
| 239 | { |
| 240 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 241 | struct crypt_priv *ctx = priv; |
| 242 | int i; |
| 243 | |
| 244 | ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); |
| 245 | |
| 246 | if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) { |
Jussi Kivilinna | facd416 | 2012-10-20 15:06:51 +0300 | [diff] [blame] | 247 | serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 248 | return; |
| 249 | } |
| 250 | |
| 251 | for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
| 252 | __serpent_decrypt(ctx->ctx, srcdst, srcdst); |
| 253 | } |
| 254 | |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 255 | int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 256 | unsigned int keylen) |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 257 | { |
| 258 | struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm); |
| 259 | int err; |
| 260 | |
| 261 | err = __serpent_setkey(&ctx->serpent_ctx, key, keylen - |
| 262 | SERPENT_BLOCK_SIZE); |
| 263 | if (err) |
| 264 | return err; |
| 265 | |
| 266 | return lrw_init_table(&ctx->lrw_table, key + keylen - |
| 267 | SERPENT_BLOCK_SIZE); |
| 268 | } |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 269 | EXPORT_SYMBOL_GPL(lrw_serpent_setkey); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 270 | |
| 271 | static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 272 | struct scatterlist *src, unsigned int nbytes) |
| 273 | { |
| 274 | struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 275 | be128 buf[SERPENT_PARALLEL_BLOCKS]; |
| 276 | struct crypt_priv crypt_ctx = { |
| 277 | .ctx = &ctx->serpent_ctx, |
| 278 | .fpu_enabled = false, |
| 279 | }; |
| 280 | struct lrw_crypt_req req = { |
| 281 | .tbuf = buf, |
| 282 | .tbuflen = sizeof(buf), |
| 283 | |
| 284 | .table_ctx = &ctx->lrw_table, |
| 285 | .crypt_ctx = &crypt_ctx, |
| 286 | .crypt_fn = encrypt_callback, |
| 287 | }; |
| 288 | int ret; |
| 289 | |
| 290 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 291 | ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| 292 | serpent_fpu_end(crypt_ctx.fpu_enabled); |
| 293 | |
| 294 | return ret; |
| 295 | } |
| 296 | |
| 297 | static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 298 | struct scatterlist *src, unsigned int nbytes) |
| 299 | { |
| 300 | struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 301 | be128 buf[SERPENT_PARALLEL_BLOCKS]; |
| 302 | struct crypt_priv crypt_ctx = { |
| 303 | .ctx = &ctx->serpent_ctx, |
| 304 | .fpu_enabled = false, |
| 305 | }; |
| 306 | struct lrw_crypt_req req = { |
| 307 | .tbuf = buf, |
| 308 | .tbuflen = sizeof(buf), |
| 309 | |
| 310 | .table_ctx = &ctx->lrw_table, |
| 311 | .crypt_ctx = &crypt_ctx, |
| 312 | .crypt_fn = decrypt_callback, |
| 313 | }; |
| 314 | int ret; |
| 315 | |
| 316 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 317 | ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| 318 | serpent_fpu_end(crypt_ctx.fpu_enabled); |
| 319 | |
| 320 | return ret; |
| 321 | } |
| 322 | |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 323 | void lrw_serpent_exit_tfm(struct crypto_tfm *tfm) |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 324 | { |
| 325 | struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm); |
| 326 | |
| 327 | lrw_free_table(&ctx->lrw_table); |
| 328 | } |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 329 | EXPORT_SYMBOL_GPL(lrw_serpent_exit_tfm); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 330 | |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 331 | int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 332 | unsigned int keylen) |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 333 | { |
| 334 | struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 335 | int err; |
| 336 | |
Stephan Mueller | 28856a9 | 2016-02-09 15:37:47 +0100 | [diff] [blame] | 337 | err = xts_check_key(tfm, key, keylen); |
| 338 | if (err) |
| 339 | return err; |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 340 | |
| 341 | /* first half of xts-key is for crypt */ |
| 342 | err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2); |
| 343 | if (err) |
| 344 | return err; |
| 345 | |
| 346 | /* second half of xts-key is for tweak */ |
| 347 | return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2); |
| 348 | } |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 349 | EXPORT_SYMBOL_GPL(xts_serpent_setkey); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 350 | |
| 351 | static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 352 | struct scatterlist *src, unsigned int nbytes) |
| 353 | { |
| 354 | struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 355 | |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 356 | return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes, |
| 357 | XTS_TWEAK_CAST(__serpent_encrypt), |
| 358 | &ctx->tweak_ctx, &ctx->crypt_ctx); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 362 | struct scatterlist *src, unsigned int nbytes) |
| 363 | { |
| 364 | struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 365 | |
Jussi Kivilinna | a05248e | 2013-04-08 21:50:55 +0300 | [diff] [blame] | 366 | return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes, |
| 367 | XTS_TWEAK_CAST(__serpent_encrypt), |
| 368 | &ctx->tweak_ctx, &ctx->crypt_ctx); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 369 | } |
| 370 | |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 371 | static struct crypto_alg serpent_algs[10] = { { |
| 372 | .cra_name = "__ecb-serpent-avx", |
| 373 | .cra_driver_name = "__driver-ecb-serpent-avx", |
| 374 | .cra_priority = 0, |
Stephan Mueller | 65aed53 | 2015-03-30 22:07:05 +0200 | [diff] [blame] | 375 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| 376 | CRYPTO_ALG_INTERNAL, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 377 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 378 | .cra_ctxsize = sizeof(struct serpent_ctx), |
| 379 | .cra_alignmask = 0, |
| 380 | .cra_type = &crypto_blkcipher_type, |
| 381 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 382 | .cra_u = { |
| 383 | .blkcipher = { |
| 384 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 385 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 386 | .setkey = serpent_setkey, |
| 387 | .encrypt = ecb_encrypt, |
| 388 | .decrypt = ecb_decrypt, |
| 389 | }, |
| 390 | }, |
| 391 | }, { |
| 392 | .cra_name = "__cbc-serpent-avx", |
| 393 | .cra_driver_name = "__driver-cbc-serpent-avx", |
| 394 | .cra_priority = 0, |
Stephan Mueller | 65aed53 | 2015-03-30 22:07:05 +0200 | [diff] [blame] | 395 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| 396 | CRYPTO_ALG_INTERNAL, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 397 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 398 | .cra_ctxsize = sizeof(struct serpent_ctx), |
| 399 | .cra_alignmask = 0, |
| 400 | .cra_type = &crypto_blkcipher_type, |
| 401 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 402 | .cra_u = { |
| 403 | .blkcipher = { |
| 404 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 405 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 406 | .setkey = serpent_setkey, |
| 407 | .encrypt = cbc_encrypt, |
| 408 | .decrypt = cbc_decrypt, |
| 409 | }, |
| 410 | }, |
| 411 | }, { |
| 412 | .cra_name = "__ctr-serpent-avx", |
| 413 | .cra_driver_name = "__driver-ctr-serpent-avx", |
| 414 | .cra_priority = 0, |
Stephan Mueller | 65aed53 | 2015-03-30 22:07:05 +0200 | [diff] [blame] | 415 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| 416 | CRYPTO_ALG_INTERNAL, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 417 | .cra_blocksize = 1, |
| 418 | .cra_ctxsize = sizeof(struct serpent_ctx), |
| 419 | .cra_alignmask = 0, |
| 420 | .cra_type = &crypto_blkcipher_type, |
| 421 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 422 | .cra_u = { |
| 423 | .blkcipher = { |
| 424 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 425 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 426 | .ivsize = SERPENT_BLOCK_SIZE, |
| 427 | .setkey = serpent_setkey, |
| 428 | .encrypt = ctr_crypt, |
| 429 | .decrypt = ctr_crypt, |
| 430 | }, |
| 431 | }, |
| 432 | }, { |
| 433 | .cra_name = "__lrw-serpent-avx", |
| 434 | .cra_driver_name = "__driver-lrw-serpent-avx", |
| 435 | .cra_priority = 0, |
Stephan Mueller | 65aed53 | 2015-03-30 22:07:05 +0200 | [diff] [blame] | 436 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| 437 | CRYPTO_ALG_INTERNAL, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 438 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 439 | .cra_ctxsize = sizeof(struct serpent_lrw_ctx), |
| 440 | .cra_alignmask = 0, |
| 441 | .cra_type = &crypto_blkcipher_type, |
| 442 | .cra_module = THIS_MODULE, |
Jussi Kivilinna | 56d76c9 | 2013-04-13 13:46:55 +0300 | [diff] [blame] | 443 | .cra_exit = lrw_serpent_exit_tfm, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 444 | .cra_u = { |
| 445 | .blkcipher = { |
| 446 | .min_keysize = SERPENT_MIN_KEY_SIZE + |
| 447 | SERPENT_BLOCK_SIZE, |
| 448 | .max_keysize = SERPENT_MAX_KEY_SIZE + |
| 449 | SERPENT_BLOCK_SIZE, |
| 450 | .ivsize = SERPENT_BLOCK_SIZE, |
| 451 | .setkey = lrw_serpent_setkey, |
| 452 | .encrypt = lrw_encrypt, |
| 453 | .decrypt = lrw_decrypt, |
| 454 | }, |
| 455 | }, |
| 456 | }, { |
| 457 | .cra_name = "__xts-serpent-avx", |
| 458 | .cra_driver_name = "__driver-xts-serpent-avx", |
| 459 | .cra_priority = 0, |
Stephan Mueller | 65aed53 | 2015-03-30 22:07:05 +0200 | [diff] [blame] | 460 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| 461 | CRYPTO_ALG_INTERNAL, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 462 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 463 | .cra_ctxsize = sizeof(struct serpent_xts_ctx), |
| 464 | .cra_alignmask = 0, |
| 465 | .cra_type = &crypto_blkcipher_type, |
| 466 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 467 | .cra_u = { |
| 468 | .blkcipher = { |
| 469 | .min_keysize = SERPENT_MIN_KEY_SIZE * 2, |
| 470 | .max_keysize = SERPENT_MAX_KEY_SIZE * 2, |
| 471 | .ivsize = SERPENT_BLOCK_SIZE, |
| 472 | .setkey = xts_serpent_setkey, |
| 473 | .encrypt = xts_encrypt, |
| 474 | .decrypt = xts_decrypt, |
| 475 | }, |
| 476 | }, |
| 477 | }, { |
| 478 | .cra_name = "ecb(serpent)", |
| 479 | .cra_driver_name = "ecb-serpent-avx", |
| 480 | .cra_priority = 500, |
| 481 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 482 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
Jussi Kivilinna | ffaf915 | 2012-06-18 14:06:58 +0300 | [diff] [blame] | 483 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 484 | .cra_alignmask = 0, |
| 485 | .cra_type = &crypto_ablkcipher_type, |
| 486 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 487 | .cra_init = ablk_init, |
| 488 | .cra_exit = ablk_exit, |
| 489 | .cra_u = { |
| 490 | .ablkcipher = { |
| 491 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 492 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 493 | .setkey = ablk_set_key, |
| 494 | .encrypt = ablk_encrypt, |
| 495 | .decrypt = ablk_decrypt, |
| 496 | }, |
| 497 | }, |
| 498 | }, { |
| 499 | .cra_name = "cbc(serpent)", |
| 500 | .cra_driver_name = "cbc-serpent-avx", |
| 501 | .cra_priority = 500, |
| 502 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 503 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
Jussi Kivilinna | ffaf915 | 2012-06-18 14:06:58 +0300 | [diff] [blame] | 504 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 505 | .cra_alignmask = 0, |
| 506 | .cra_type = &crypto_ablkcipher_type, |
| 507 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 508 | .cra_init = ablk_init, |
| 509 | .cra_exit = ablk_exit, |
| 510 | .cra_u = { |
| 511 | .ablkcipher = { |
| 512 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 513 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 514 | .ivsize = SERPENT_BLOCK_SIZE, |
| 515 | .setkey = ablk_set_key, |
| 516 | .encrypt = __ablk_encrypt, |
| 517 | .decrypt = ablk_decrypt, |
| 518 | }, |
| 519 | }, |
| 520 | }, { |
| 521 | .cra_name = "ctr(serpent)", |
| 522 | .cra_driver_name = "ctr-serpent-avx", |
| 523 | .cra_priority = 500, |
| 524 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 525 | .cra_blocksize = 1, |
Jussi Kivilinna | ffaf915 | 2012-06-18 14:06:58 +0300 | [diff] [blame] | 526 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 527 | .cra_alignmask = 0, |
| 528 | .cra_type = &crypto_ablkcipher_type, |
| 529 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 530 | .cra_init = ablk_init, |
| 531 | .cra_exit = ablk_exit, |
| 532 | .cra_u = { |
| 533 | .ablkcipher = { |
| 534 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 535 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 536 | .ivsize = SERPENT_BLOCK_SIZE, |
| 537 | .setkey = ablk_set_key, |
| 538 | .encrypt = ablk_encrypt, |
| 539 | .decrypt = ablk_encrypt, |
| 540 | .geniv = "chainiv", |
| 541 | }, |
| 542 | }, |
| 543 | }, { |
| 544 | .cra_name = "lrw(serpent)", |
| 545 | .cra_driver_name = "lrw-serpent-avx", |
| 546 | .cra_priority = 500, |
| 547 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 548 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
Jussi Kivilinna | ffaf915 | 2012-06-18 14:06:58 +0300 | [diff] [blame] | 549 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 550 | .cra_alignmask = 0, |
| 551 | .cra_type = &crypto_ablkcipher_type, |
| 552 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 553 | .cra_init = ablk_init, |
| 554 | .cra_exit = ablk_exit, |
| 555 | .cra_u = { |
| 556 | .ablkcipher = { |
| 557 | .min_keysize = SERPENT_MIN_KEY_SIZE + |
| 558 | SERPENT_BLOCK_SIZE, |
| 559 | .max_keysize = SERPENT_MAX_KEY_SIZE + |
| 560 | SERPENT_BLOCK_SIZE, |
| 561 | .ivsize = SERPENT_BLOCK_SIZE, |
| 562 | .setkey = ablk_set_key, |
| 563 | .encrypt = ablk_encrypt, |
| 564 | .decrypt = ablk_decrypt, |
| 565 | }, |
| 566 | }, |
| 567 | }, { |
| 568 | .cra_name = "xts(serpent)", |
| 569 | .cra_driver_name = "xts-serpent-avx", |
| 570 | .cra_priority = 500, |
| 571 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 572 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
Jussi Kivilinna | ffaf915 | 2012-06-18 14:06:58 +0300 | [diff] [blame] | 573 | .cra_ctxsize = sizeof(struct async_helper_ctx), |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 574 | .cra_alignmask = 0, |
| 575 | .cra_type = &crypto_ablkcipher_type, |
| 576 | .cra_module = THIS_MODULE, |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 577 | .cra_init = ablk_init, |
| 578 | .cra_exit = ablk_exit, |
| 579 | .cra_u = { |
| 580 | .ablkcipher = { |
| 581 | .min_keysize = SERPENT_MIN_KEY_SIZE * 2, |
| 582 | .max_keysize = SERPENT_MAX_KEY_SIZE * 2, |
| 583 | .ivsize = SERPENT_BLOCK_SIZE, |
| 584 | .setkey = ablk_set_key, |
| 585 | .encrypt = ablk_encrypt, |
| 586 | .decrypt = ablk_decrypt, |
| 587 | }, |
| 588 | }, |
| 589 | } }; |
| 590 | |
| 591 | static int __init serpent_init(void) |
| 592 | { |
Ingo Molnar | c1c23f7 | 2015-04-28 10:11:24 +0200 | [diff] [blame] | 593 | const char *feature_name; |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 594 | |
Dave Hansen | d91cab7 | 2015-09-02 16:31:26 -0700 | [diff] [blame] | 595 | if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, |
| 596 | &feature_name)) { |
Ingo Molnar | c1c23f7 | 2015-04-28 10:11:24 +0200 | [diff] [blame] | 597 | pr_info("CPU feature '%s' is not supported.\n", feature_name); |
Johannes Goetzfried | 7efe407 | 2012-06-12 16:47:43 +0800 | [diff] [blame] | 598 | return -ENODEV; |
| 599 | } |
| 600 | |
| 601 | return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs)); |
| 602 | } |
| 603 | |
| 604 | static void __exit serpent_exit(void) |
| 605 | { |
| 606 | crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs)); |
| 607 | } |
| 608 | |
| 609 | module_init(serpent_init); |
| 610 | module_exit(serpent_exit); |
| 611 | |
| 612 | MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized"); |
| 613 | MODULE_LICENSE("GPL"); |
Kees Cook | 5d26a10 | 2014-11-20 17:05:53 -0800 | [diff] [blame] | 614 | MODULE_ALIAS_CRYPTO("serpent"); |