Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Asynchronous block chaining cipher operations. |
Richard Hartmann | c4ede64 | 2010-02-16 20:23:37 +0800 | [diff] [blame] | 3 | * |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 4 | * This is the asynchronous version of blkcipher.c indicating completion |
| 5 | * via a callback. |
| 6 | * |
| 7 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| 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 |
Richard Hartmann | c4ede64 | 2010-02-16 20:23:37 +0800 | [diff] [blame] | 11 | * Software Foundation; either version 2 of the License, or (at your option) |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 12 | * any later version. |
| 13 | * |
| 14 | */ |
| 15 | |
Herbert Xu | 378f4f5 | 2007-12-17 20:07:31 +0800 | [diff] [blame] | 16 | #include <crypto/internal/skcipher.h> |
| 17 | #include <linux/err.h> |
Herbert Xu | 791b4d5 | 2007-08-23 16:23:01 +0800 | [diff] [blame] | 18 | #include <linux/kernel.h> |
Herbert Xu | 791b4d5 | 2007-08-23 16:23:01 +0800 | [diff] [blame] | 19 | #include <linux/slab.h> |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 20 | #include <linux/seq_file.h> |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 21 | #include <linux/cryptouser.h> |
Gideon Israel Dsouza | d8c34b9 | 2016-12-31 21:26:23 +0530 | [diff] [blame] | 22 | #include <linux/compiler.h> |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 23 | #include <net/netlink.h> |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 24 | |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 25 | #include <crypto/scatterwalk.h> |
| 26 | |
Herbert Xu | 378f4f5 | 2007-12-17 20:07:31 +0800 | [diff] [blame] | 27 | #include "internal.h" |
| 28 | |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 29 | struct ablkcipher_buffer { |
| 30 | struct list_head entry; |
| 31 | struct scatter_walk dst; |
| 32 | unsigned int len; |
| 33 | void *data; |
| 34 | }; |
| 35 | |
| 36 | enum { |
| 37 | ABLKCIPHER_WALK_SLOW = 1 << 0, |
| 38 | }; |
| 39 | |
| 40 | static inline void ablkcipher_buffer_write(struct ablkcipher_buffer *p) |
| 41 | { |
| 42 | scatterwalk_copychunks(p->data, &p->dst, p->len, 1); |
| 43 | } |
| 44 | |
| 45 | void __ablkcipher_walk_complete(struct ablkcipher_walk *walk) |
| 46 | { |
| 47 | struct ablkcipher_buffer *p, *tmp; |
| 48 | |
| 49 | list_for_each_entry_safe(p, tmp, &walk->buffers, entry) { |
| 50 | ablkcipher_buffer_write(p); |
| 51 | list_del(&p->entry); |
| 52 | kfree(p); |
| 53 | } |
| 54 | } |
| 55 | EXPORT_SYMBOL_GPL(__ablkcipher_walk_complete); |
| 56 | |
| 57 | static inline void ablkcipher_queue_write(struct ablkcipher_walk *walk, |
| 58 | struct ablkcipher_buffer *p) |
| 59 | { |
| 60 | p->dst = walk->out; |
| 61 | list_add_tail(&p->entry, &walk->buffers); |
| 62 | } |
| 63 | |
| 64 | /* Get a spot of the specified length that does not straddle a page. |
| 65 | * The caller needs to ensure that there is enough space for this operation. |
| 66 | */ |
| 67 | static inline u8 *ablkcipher_get_spot(u8 *start, unsigned int len) |
| 68 | { |
| 69 | u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK); |
Joshua I. James | a861afb | 2014-12-05 14:06:16 +0900 | [diff] [blame] | 70 | |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 71 | return max(start, end_page); |
| 72 | } |
| 73 | |
| 74 | static inline unsigned int ablkcipher_done_slow(struct ablkcipher_walk *walk, |
| 75 | unsigned int bsize) |
| 76 | { |
| 77 | unsigned int n = bsize; |
| 78 | |
| 79 | for (;;) { |
| 80 | unsigned int len_this_page = scatterwalk_pagelen(&walk->out); |
| 81 | |
| 82 | if (len_this_page > n) |
| 83 | len_this_page = n; |
| 84 | scatterwalk_advance(&walk->out, n); |
| 85 | if (n == len_this_page) |
| 86 | break; |
| 87 | n -= len_this_page; |
Cristian Stoica | 5be4d4c | 2015-01-20 10:06:16 +0200 | [diff] [blame] | 88 | scatterwalk_start(&walk->out, sg_next(walk->out.sg)); |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | return bsize; |
| 92 | } |
| 93 | |
| 94 | static inline unsigned int ablkcipher_done_fast(struct ablkcipher_walk *walk, |
| 95 | unsigned int n) |
| 96 | { |
| 97 | scatterwalk_advance(&walk->in, n); |
| 98 | scatterwalk_advance(&walk->out, n); |
| 99 | |
| 100 | return n; |
| 101 | } |
| 102 | |
| 103 | static int ablkcipher_walk_next(struct ablkcipher_request *req, |
| 104 | struct ablkcipher_walk *walk); |
| 105 | |
| 106 | int ablkcipher_walk_done(struct ablkcipher_request *req, |
| 107 | struct ablkcipher_walk *walk, int err) |
| 108 | { |
| 109 | struct crypto_tfm *tfm = req->base.tfm; |
| 110 | unsigned int nbytes = 0; |
| 111 | |
| 112 | if (likely(err >= 0)) { |
| 113 | unsigned int n = walk->nbytes - err; |
| 114 | |
| 115 | if (likely(!(walk->flags & ABLKCIPHER_WALK_SLOW))) |
| 116 | n = ablkcipher_done_fast(walk, n); |
| 117 | else if (WARN_ON(err)) { |
| 118 | err = -EINVAL; |
| 119 | goto err; |
| 120 | } else |
| 121 | n = ablkcipher_done_slow(walk, n); |
| 122 | |
| 123 | nbytes = walk->total - n; |
| 124 | err = 0; |
| 125 | } |
| 126 | |
| 127 | scatterwalk_done(&walk->in, 0, nbytes); |
| 128 | scatterwalk_done(&walk->out, 1, nbytes); |
| 129 | |
| 130 | err: |
| 131 | walk->total = nbytes; |
| 132 | walk->nbytes = nbytes; |
| 133 | |
| 134 | if (nbytes) { |
| 135 | crypto_yield(req->base.flags); |
| 136 | return ablkcipher_walk_next(req, walk); |
| 137 | } |
| 138 | |
| 139 | if (walk->iv != req->info) |
| 140 | memcpy(req->info, walk->iv, tfm->crt_ablkcipher.ivsize); |
Davidlohr Bueso | 33c7c0f | 2011-01-29 15:09:43 +1100 | [diff] [blame] | 141 | kfree(walk->iv_buffer); |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 142 | |
| 143 | return err; |
| 144 | } |
| 145 | EXPORT_SYMBOL_GPL(ablkcipher_walk_done); |
| 146 | |
| 147 | static inline int ablkcipher_next_slow(struct ablkcipher_request *req, |
| 148 | struct ablkcipher_walk *walk, |
| 149 | unsigned int bsize, |
| 150 | unsigned int alignmask, |
| 151 | void **src_p, void **dst_p) |
| 152 | { |
| 153 | unsigned aligned_bsize = ALIGN(bsize, alignmask + 1); |
| 154 | struct ablkcipher_buffer *p; |
| 155 | void *src, *dst, *base; |
| 156 | unsigned int n; |
| 157 | |
| 158 | n = ALIGN(sizeof(struct ablkcipher_buffer), alignmask + 1); |
| 159 | n += (aligned_bsize * 3 - (alignmask + 1) + |
| 160 | (alignmask & ~(crypto_tfm_ctx_alignment() - 1))); |
| 161 | |
| 162 | p = kmalloc(n, GFP_ATOMIC); |
| 163 | if (!p) |
Jiri Slaby | 2716fbf | 2010-06-23 20:01:45 +1000 | [diff] [blame] | 164 | return ablkcipher_walk_done(req, walk, -ENOMEM); |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 165 | |
| 166 | base = p + 1; |
| 167 | |
| 168 | dst = (u8 *)ALIGN((unsigned long)base, alignmask + 1); |
| 169 | src = dst = ablkcipher_get_spot(dst, bsize); |
| 170 | |
| 171 | p->len = bsize; |
| 172 | p->data = dst; |
| 173 | |
| 174 | scatterwalk_copychunks(src, &walk->in, bsize, 0); |
| 175 | |
| 176 | ablkcipher_queue_write(walk, p); |
| 177 | |
| 178 | walk->nbytes = bsize; |
| 179 | walk->flags |= ABLKCIPHER_WALK_SLOW; |
| 180 | |
| 181 | *src_p = src; |
| 182 | *dst_p = dst; |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static inline int ablkcipher_copy_iv(struct ablkcipher_walk *walk, |
| 188 | struct crypto_tfm *tfm, |
| 189 | unsigned int alignmask) |
| 190 | { |
| 191 | unsigned bs = walk->blocksize; |
| 192 | unsigned int ivsize = tfm->crt_ablkcipher.ivsize; |
| 193 | unsigned aligned_bs = ALIGN(bs, alignmask + 1); |
| 194 | unsigned int size = aligned_bs * 2 + ivsize + max(aligned_bs, ivsize) - |
| 195 | (alignmask + 1); |
| 196 | u8 *iv; |
| 197 | |
| 198 | size += alignmask & ~(crypto_tfm_ctx_alignment() - 1); |
| 199 | walk->iv_buffer = kmalloc(size, GFP_ATOMIC); |
| 200 | if (!walk->iv_buffer) |
| 201 | return -ENOMEM; |
| 202 | |
| 203 | iv = (u8 *)ALIGN((unsigned long)walk->iv_buffer, alignmask + 1); |
| 204 | iv = ablkcipher_get_spot(iv, bs) + aligned_bs; |
| 205 | iv = ablkcipher_get_spot(iv, bs) + aligned_bs; |
| 206 | iv = ablkcipher_get_spot(iv, ivsize); |
| 207 | |
| 208 | walk->iv = memcpy(iv, walk->iv, ivsize); |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static inline int ablkcipher_next_fast(struct ablkcipher_request *req, |
| 213 | struct ablkcipher_walk *walk) |
| 214 | { |
| 215 | walk->src.page = scatterwalk_page(&walk->in); |
| 216 | walk->src.offset = offset_in_page(walk->in.offset); |
| 217 | walk->dst.page = scatterwalk_page(&walk->out); |
| 218 | walk->dst.offset = offset_in_page(walk->out.offset); |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int ablkcipher_walk_next(struct ablkcipher_request *req, |
| 224 | struct ablkcipher_walk *walk) |
| 225 | { |
| 226 | struct crypto_tfm *tfm = req->base.tfm; |
| 227 | unsigned int alignmask, bsize, n; |
| 228 | void *src, *dst; |
| 229 | int err; |
| 230 | |
| 231 | alignmask = crypto_tfm_alg_alignmask(tfm); |
| 232 | n = walk->total; |
| 233 | if (unlikely(n < crypto_tfm_alg_blocksize(tfm))) { |
| 234 | req->base.flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; |
| 235 | return ablkcipher_walk_done(req, walk, -EINVAL); |
| 236 | } |
| 237 | |
| 238 | walk->flags &= ~ABLKCIPHER_WALK_SLOW; |
| 239 | src = dst = NULL; |
| 240 | |
| 241 | bsize = min(walk->blocksize, n); |
| 242 | n = scatterwalk_clamp(&walk->in, n); |
| 243 | n = scatterwalk_clamp(&walk->out, n); |
| 244 | |
| 245 | if (n < bsize || |
| 246 | !scatterwalk_aligned(&walk->in, alignmask) || |
| 247 | !scatterwalk_aligned(&walk->out, alignmask)) { |
| 248 | err = ablkcipher_next_slow(req, walk, bsize, alignmask, |
| 249 | &src, &dst); |
| 250 | goto set_phys_lowmem; |
| 251 | } |
| 252 | |
| 253 | walk->nbytes = n; |
| 254 | |
| 255 | return ablkcipher_next_fast(req, walk); |
| 256 | |
| 257 | set_phys_lowmem: |
| 258 | if (err >= 0) { |
| 259 | walk->src.page = virt_to_page(src); |
| 260 | walk->dst.page = virt_to_page(dst); |
| 261 | walk->src.offset = ((unsigned long)src & (PAGE_SIZE - 1)); |
| 262 | walk->dst.offset = ((unsigned long)dst & (PAGE_SIZE - 1)); |
| 263 | } |
| 264 | |
| 265 | return err; |
| 266 | } |
| 267 | |
| 268 | static int ablkcipher_walk_first(struct ablkcipher_request *req, |
| 269 | struct ablkcipher_walk *walk) |
| 270 | { |
| 271 | struct crypto_tfm *tfm = req->base.tfm; |
| 272 | unsigned int alignmask; |
| 273 | |
| 274 | alignmask = crypto_tfm_alg_alignmask(tfm); |
| 275 | if (WARN_ON_ONCE(in_irq())) |
| 276 | return -EDEADLK; |
| 277 | |
Jason A. Donenfeld | 70d906b | 2015-12-06 02:51:37 +0100 | [diff] [blame] | 278 | walk->iv = req->info; |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 279 | walk->nbytes = walk->total; |
| 280 | if (unlikely(!walk->total)) |
| 281 | return 0; |
| 282 | |
| 283 | walk->iv_buffer = NULL; |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 284 | if (unlikely(((unsigned long)walk->iv & alignmask))) { |
| 285 | int err = ablkcipher_copy_iv(walk, tfm, alignmask); |
Joshua I. James | a861afb | 2014-12-05 14:06:16 +0900 | [diff] [blame] | 286 | |
David S. Miller | bf06099 | 2010-05-19 14:13:07 +1000 | [diff] [blame] | 287 | if (err) |
| 288 | return err; |
| 289 | } |
| 290 | |
| 291 | scatterwalk_start(&walk->in, walk->in.sg); |
| 292 | scatterwalk_start(&walk->out, walk->out.sg); |
| 293 | |
| 294 | return ablkcipher_walk_next(req, walk); |
| 295 | } |
| 296 | |
| 297 | int ablkcipher_walk_phys(struct ablkcipher_request *req, |
| 298 | struct ablkcipher_walk *walk) |
| 299 | { |
| 300 | walk->blocksize = crypto_tfm_alg_blocksize(req->base.tfm); |
| 301 | return ablkcipher_walk_first(req, walk); |
| 302 | } |
| 303 | EXPORT_SYMBOL_GPL(ablkcipher_walk_phys); |
| 304 | |
Herbert Xu | 791b4d5 | 2007-08-23 16:23:01 +0800 | [diff] [blame] | 305 | static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key, |
| 306 | unsigned int keylen) |
Sebastian Siewior | ca7c393 | 2007-05-19 19:51:21 +1000 | [diff] [blame] | 307 | { |
| 308 | struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm); |
| 309 | unsigned long alignmask = crypto_ablkcipher_alignmask(tfm); |
| 310 | int ret; |
| 311 | u8 *buffer, *alignbuffer; |
| 312 | unsigned long absize; |
| 313 | |
| 314 | absize = keylen + alignmask; |
| 315 | buffer = kmalloc(absize, GFP_ATOMIC); |
| 316 | if (!buffer) |
| 317 | return -ENOMEM; |
| 318 | |
| 319 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
| 320 | memcpy(alignbuffer, key, keylen); |
| 321 | ret = cipher->setkey(tfm, alignbuffer, keylen); |
Sebastian Siewior | 0681717 | 2007-08-03 20:33:47 +0800 | [diff] [blame] | 322 | memset(alignbuffer, 0, keylen); |
Sebastian Siewior | ca7c393 | 2007-05-19 19:51:21 +1000 | [diff] [blame] | 323 | kfree(buffer); |
| 324 | return ret; |
| 325 | } |
| 326 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 327 | static int setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
| 328 | unsigned int keylen) |
| 329 | { |
| 330 | struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm); |
Sebastian Siewior | ca7c393 | 2007-05-19 19:51:21 +1000 | [diff] [blame] | 331 | unsigned long alignmask = crypto_ablkcipher_alignmask(tfm); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 332 | |
| 333 | if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) { |
| 334 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| 335 | return -EINVAL; |
| 336 | } |
| 337 | |
Sebastian Siewior | ca7c393 | 2007-05-19 19:51:21 +1000 | [diff] [blame] | 338 | if ((unsigned long)key & alignmask) |
| 339 | return setkey_unaligned(tfm, key, keylen); |
| 340 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 341 | return cipher->setkey(tfm, key, keylen); |
| 342 | } |
| 343 | |
| 344 | static unsigned int crypto_ablkcipher_ctxsize(struct crypto_alg *alg, u32 type, |
| 345 | u32 mask) |
| 346 | { |
| 347 | return alg->cra_ctxsize; |
| 348 | } |
| 349 | |
| 350 | static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type, |
| 351 | u32 mask) |
| 352 | { |
| 353 | struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher; |
| 354 | struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher; |
| 355 | |
| 356 | if (alg->ivsize > PAGE_SIZE / 8) |
| 357 | return -EINVAL; |
| 358 | |
| 359 | crt->setkey = setkey; |
| 360 | crt->encrypt = alg->encrypt; |
| 361 | crt->decrypt = alg->decrypt; |
Herbert Xu | ecfc432 | 2007-12-05 21:08:36 +1100 | [diff] [blame] | 362 | crt->base = __crypto_ablkcipher_cast(tfm); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 363 | crt->ivsize = alg->ivsize; |
| 364 | |
| 365 | return 0; |
| 366 | } |
| 367 | |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 368 | #ifdef CONFIG_NET |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 369 | static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 370 | { |
| 371 | struct crypto_report_blkcipher rblkcipher; |
| 372 | |
Mathias Krause | 9a5467bf | 2013-02-05 18:19:13 +0100 | [diff] [blame] | 373 | strncpy(rblkcipher.type, "ablkcipher", sizeof(rblkcipher.type)); |
| 374 | strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<default>", |
| 375 | sizeof(rblkcipher.geniv)); |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 376 | |
| 377 | rblkcipher.blocksize = alg->cra_blocksize; |
| 378 | rblkcipher.min_keysize = alg->cra_ablkcipher.min_keysize; |
| 379 | rblkcipher.max_keysize = alg->cra_ablkcipher.max_keysize; |
| 380 | rblkcipher.ivsize = alg->cra_ablkcipher.ivsize; |
| 381 | |
David S. Miller | 6662df3 | 2012-04-01 20:19:05 -0400 | [diff] [blame] | 382 | if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER, |
| 383 | sizeof(struct crypto_report_blkcipher), &rblkcipher)) |
| 384 | goto nla_put_failure; |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 385 | return 0; |
| 386 | |
| 387 | nla_put_failure: |
| 388 | return -EMSGSIZE; |
| 389 | } |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 390 | #else |
| 391 | static int crypto_ablkcipher_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 392 | { |
| 393 | return -ENOSYS; |
| 394 | } |
| 395 | #endif |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 396 | |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 397 | static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg) |
Gideon Israel Dsouza | d8c34b9 | 2016-12-31 21:26:23 +0530 | [diff] [blame] | 398 | __maybe_unused; |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 399 | static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg) |
| 400 | { |
| 401 | struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher; |
| 402 | |
| 403 | seq_printf(m, "type : ablkcipher\n"); |
Herbert Xu | 189ed66 | 2007-12-14 22:29:37 +0800 | [diff] [blame] | 404 | seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ? |
| 405 | "yes" : "no"); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 406 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 407 | seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize); |
| 408 | seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize); |
| 409 | seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize); |
Herbert Xu | 23508e1 | 2007-11-27 21:33:24 +0800 | [diff] [blame] | 410 | seq_printf(m, "geniv : %s\n", ablkcipher->geniv ?: "<default>"); |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | const struct crypto_type crypto_ablkcipher_type = { |
| 414 | .ctxsize = crypto_ablkcipher_ctxsize, |
| 415 | .init = crypto_init_ablkcipher_ops, |
| 416 | #ifdef CONFIG_PROC_FS |
| 417 | .show = crypto_ablkcipher_show, |
| 418 | #endif |
Steffen Klassert | 29ffc87 | 2011-09-27 07:42:32 +0200 | [diff] [blame] | 419 | .report = crypto_ablkcipher_report, |
Herbert Xu | b5b7f08 | 2007-04-16 20:48:54 +1000 | [diff] [blame] | 420 | }; |
| 421 | EXPORT_SYMBOL_GPL(crypto_ablkcipher_type); |
| 422 | |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 423 | static int crypto_init_givcipher_ops(struct crypto_tfm *tfm, u32 type, |
| 424 | u32 mask) |
| 425 | { |
| 426 | struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher; |
| 427 | struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher; |
| 428 | |
| 429 | if (alg->ivsize > PAGE_SIZE / 8) |
| 430 | return -EINVAL; |
| 431 | |
Herbert Xu | ecfc432 | 2007-12-05 21:08:36 +1100 | [diff] [blame] | 432 | crt->setkey = tfm->__crt_alg->cra_flags & CRYPTO_ALG_GENIV ? |
| 433 | alg->setkey : setkey; |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 434 | crt->encrypt = alg->encrypt; |
| 435 | crt->decrypt = alg->decrypt; |
Herbert Xu | ecfc432 | 2007-12-05 21:08:36 +1100 | [diff] [blame] | 436 | crt->base = __crypto_ablkcipher_cast(tfm); |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 437 | crt->ivsize = alg->ivsize; |
| 438 | |
| 439 | return 0; |
| 440 | } |
| 441 | |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 442 | #ifdef CONFIG_NET |
Steffen Klassert | 3e29c10 | 2011-09-27 07:43:24 +0200 | [diff] [blame] | 443 | static int crypto_givcipher_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 444 | { |
| 445 | struct crypto_report_blkcipher rblkcipher; |
| 446 | |
Mathias Krause | 9a5467bf | 2013-02-05 18:19:13 +0100 | [diff] [blame] | 447 | strncpy(rblkcipher.type, "givcipher", sizeof(rblkcipher.type)); |
| 448 | strncpy(rblkcipher.geniv, alg->cra_ablkcipher.geniv ?: "<built-in>", |
| 449 | sizeof(rblkcipher.geniv)); |
Steffen Klassert | 3e29c10 | 2011-09-27 07:43:24 +0200 | [diff] [blame] | 450 | |
| 451 | rblkcipher.blocksize = alg->cra_blocksize; |
| 452 | rblkcipher.min_keysize = alg->cra_ablkcipher.min_keysize; |
| 453 | rblkcipher.max_keysize = alg->cra_ablkcipher.max_keysize; |
| 454 | rblkcipher.ivsize = alg->cra_ablkcipher.ivsize; |
| 455 | |
David S. Miller | 6662df3 | 2012-04-01 20:19:05 -0400 | [diff] [blame] | 456 | if (nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER, |
| 457 | sizeof(struct crypto_report_blkcipher), &rblkcipher)) |
| 458 | goto nla_put_failure; |
Steffen Klassert | 3e29c10 | 2011-09-27 07:43:24 +0200 | [diff] [blame] | 459 | return 0; |
| 460 | |
| 461 | nla_put_failure: |
| 462 | return -EMSGSIZE; |
| 463 | } |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 464 | #else |
| 465 | static int crypto_givcipher_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 466 | { |
| 467 | return -ENOSYS; |
| 468 | } |
| 469 | #endif |
Steffen Klassert | 3e29c10 | 2011-09-27 07:43:24 +0200 | [diff] [blame] | 470 | |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 471 | static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg) |
Gideon Israel Dsouza | d8c34b9 | 2016-12-31 21:26:23 +0530 | [diff] [blame] | 472 | __maybe_unused; |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 473 | static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg) |
| 474 | { |
| 475 | struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher; |
| 476 | |
| 477 | seq_printf(m, "type : givcipher\n"); |
Herbert Xu | 189ed66 | 2007-12-14 22:29:37 +0800 | [diff] [blame] | 478 | seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ? |
| 479 | "yes" : "no"); |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 480 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 481 | seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize); |
| 482 | seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize); |
| 483 | seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize); |
Herbert Xu | 23508e1 | 2007-11-27 21:33:24 +0800 | [diff] [blame] | 484 | seq_printf(m, "geniv : %s\n", ablkcipher->geniv ?: "<built-in>"); |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | const struct crypto_type crypto_givcipher_type = { |
| 488 | .ctxsize = crypto_ablkcipher_ctxsize, |
| 489 | .init = crypto_init_givcipher_ops, |
| 490 | #ifdef CONFIG_PROC_FS |
| 491 | .show = crypto_givcipher_show, |
| 492 | #endif |
Steffen Klassert | 3e29c10 | 2011-09-27 07:43:24 +0200 | [diff] [blame] | 493 | .report = crypto_givcipher_report, |
Herbert Xu | 61da88e | 2007-12-17 21:51:27 +0800 | [diff] [blame] | 494 | }; |
| 495 | EXPORT_SYMBOL_GPL(crypto_givcipher_type); |