Blame view
crypto/algif_hash.c
9.59 KB
2874c5fd2 treewide: Replace... |
1 |
// SPDX-License-Identifier: GPL-2.0-or-later |
fe869cdb8 crypto: algif_has... |
2 3 4 5 6 7 |
/* * algif_hash: User-space interface for hash algorithms * * This file provides the user-space API for hash algorithms. * * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> |
fe869cdb8 crypto: algif_has... |
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
*/ #include <crypto/hash.h> #include <crypto/if_alg.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/net.h> #include <net/sock.h> struct hash_ctx { struct af_alg_sgl sgl; u8 *result; |
2c3f8b162 crypto: algif - m... |
23 |
struct crypto_wait wait; |
fe869cdb8 crypto: algif_has... |
24 25 26 27 28 29 |
unsigned int len; bool more; struct ahash_request req; }; |
493b2ed3f crypto: algif_has... |
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 |
static int hash_alloc_result(struct sock *sk, struct hash_ctx *ctx) { unsigned ds; if (ctx->result) return 0; ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); ctx->result = sock_kmalloc(sk, ds, GFP_KERNEL); if (!ctx->result) return -ENOMEM; memset(ctx->result, 0, ds); return 0; } static void hash_free_result(struct sock *sk, struct hash_ctx *ctx) { unsigned ds; if (!ctx->result) return; ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); sock_kzfree_s(sk, ctx->result, ds); ctx->result = NULL; } |
1b7841404 net: Remove iocb ... |
60 61 |
static int hash_sendmsg(struct socket *sock, struct msghdr *msg, size_t ignored) |
fe869cdb8 crypto: algif_has... |
62 63 64 65 66 |
{ int limit = ALG_MAX_PAGES * PAGE_SIZE; struct sock *sk = sock->sk; struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; |
fe869cdb8 crypto: algif_has... |
67 68 69 70 71 72 73 74 |
long copied = 0; int err; if (limit > sk->sk_sndbuf) limit = sk->sk_sndbuf; lock_sock(sk); if (!ctx->more) { |
493b2ed3f crypto: algif_has... |
75 76 |
if ((msg->msg_flags & MSG_MORE)) hash_free_result(sk, ctx); |
2c3f8b162 crypto: algif - m... |
77 |
err = crypto_wait_req(crypto_ahash_init(&ctx->req), &ctx->wait); |
fe869cdb8 crypto: algif_has... |
78 79 80 81 82 |
if (err) goto unlock; } ctx->more = 0; |
01e97e651 new helper: msg_d... |
83 84 |
while (msg_data_left(msg)) { int len = msg_data_left(msg); |
fe869cdb8 crypto: algif_has... |
85 |
|
1d10eb2f1 crypto: switch af... |
86 87 |
if (len > limit) len = limit; |
fe869cdb8 crypto: algif_has... |
88 |
|
1d10eb2f1 crypto: switch af... |
89 90 91 92 93 |
len = af_alg_make_sg(&ctx->sgl, &msg->msg_iter, len); if (len < 0) { err = copied ? 0 : len; goto unlock; } |
fe869cdb8 crypto: algif_has... |
94 |
|
1d10eb2f1 crypto: switch af... |
95 |
ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL, len); |
fe869cdb8 crypto: algif_has... |
96 |
|
2c3f8b162 crypto: algif - m... |
97 98 |
err = crypto_wait_req(crypto_ahash_update(&ctx->req), &ctx->wait); |
1d10eb2f1 crypto: switch af... |
99 100 101 |
af_alg_free_sg(&ctx->sgl); if (err) goto unlock; |
fe869cdb8 crypto: algif_has... |
102 |
|
1d10eb2f1 crypto: switch af... |
103 104 |
copied += len; iov_iter_advance(&msg->msg_iter, len); |
fe869cdb8 crypto: algif_has... |
105 106 107 108 109 110 |
} err = 0; ctx->more = msg->msg_flags & MSG_MORE; if (!ctx->more) { |
493b2ed3f crypto: algif_has... |
111 112 113 |
err = hash_alloc_result(sk, ctx); if (err) goto unlock; |
fe869cdb8 crypto: algif_has... |
114 |
ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); |
2c3f8b162 crypto: algif - m... |
115 116 |
err = crypto_wait_req(crypto_ahash_final(&ctx->req), &ctx->wait); |
fe869cdb8 crypto: algif_has... |
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 |
} unlock: release_sock(sk); return err ?: copied; } static ssize_t hash_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) { struct sock *sk = sock->sk; struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; int err; |
d3f7d56a7 net: update consu... |
132 133 |
if (flags & MSG_SENDPAGE_NOTLAST) flags |= MSG_MORE; |
fe869cdb8 crypto: algif_has... |
134 135 136 |
lock_sock(sk); sg_init_table(ctx->sgl.sg, 1); sg_set_page(ctx->sgl.sg, page, size, offset); |
493b2ed3f crypto: algif_has... |
137 138 139 140 141 142 |
if (!(flags & MSG_MORE)) { err = hash_alloc_result(sk, ctx); if (err) goto unlock; } else if (!ctx->more) hash_free_result(sk, ctx); |
fe869cdb8 crypto: algif_has... |
143 144 145 146 147 148 149 150 151 152 |
ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, ctx->result, size); if (!(flags & MSG_MORE)) { if (ctx->more) err = crypto_ahash_finup(&ctx->req); else err = crypto_ahash_digest(&ctx->req); } else { if (!ctx->more) { err = crypto_ahash_init(&ctx->req); |
2c3f8b162 crypto: algif - m... |
153 |
err = crypto_wait_req(err, &ctx->wait); |
fe869cdb8 crypto: algif_has... |
154 155 156 157 158 159 |
if (err) goto unlock; } err = crypto_ahash_update(&ctx->req); } |
2c3f8b162 crypto: algif - m... |
160 |
err = crypto_wait_req(err, &ctx->wait); |
fe869cdb8 crypto: algif_has... |
161 162 163 164 165 166 167 168 169 170 |
if (err) goto unlock; ctx->more = flags & MSG_MORE; unlock: release_sock(sk); return err ?: size; } |
1b7841404 net: Remove iocb ... |
171 172 |
static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, int flags) |
fe869cdb8 crypto: algif_has... |
173 174 175 176 177 |
{ struct sock *sk = sock->sk; struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; unsigned ds = crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)); |
493b2ed3f crypto: algif_has... |
178 |
bool result; |
fe869cdb8 crypto: algif_has... |
179 180 181 182 183 184 185 186 |
int err; if (len > ds) len = ds; else if (len < ds) msg->msg_flags |= MSG_TRUNC; lock_sock(sk); |
493b2ed3f crypto: algif_has... |
187 188 189 190 191 192 |
result = ctx->result; err = hash_alloc_result(sk, ctx); if (err) goto unlock; ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); |
8acf7a106 crypto: algif_has... |
193 |
if (!result && !ctx->more) { |
2c3f8b162 crypto: algif - m... |
194 195 |
err = crypto_wait_req(crypto_ahash_init(&ctx->req), &ctx->wait); |
a8348bca2 crypto: algif_has... |
196 197 198 199 200 |
if (err) goto unlock; } if (!result || ctx->more) { |
fe869cdb8 crypto: algif_has... |
201 |
ctx->more = 0; |
2c3f8b162 crypto: algif - m... |
202 203 |
err = crypto_wait_req(crypto_ahash_final(&ctx->req), &ctx->wait); |
fe869cdb8 crypto: algif_has... |
204 205 206 |
if (err) goto unlock; } |
7eab8d9e8 new helper: memcp... |
207 |
err = memcpy_to_msg(msg, ctx->result, len); |
fe869cdb8 crypto: algif_has... |
208 209 |
unlock: |
a8348bca2 crypto: algif_has... |
210 |
hash_free_result(sk, ctx); |
fe869cdb8 crypto: algif_has... |
211 212 213 214 |
release_sock(sk); return err ?: len; } |
cdfbabfb2 net: Work around ... |
215 216 |
static int hash_accept(struct socket *sock, struct socket *newsock, int flags, bool kern) |
fe869cdb8 crypto: algif_has... |
217 218 219 220 221 |
{ struct sock *sk = sock->sk; struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; struct ahash_request *req = &ctx->req; |
b68a7ec1e crypto: hash - Re... |
222 |
char state[HASH_MAX_STATESIZE]; |
fe869cdb8 crypto: algif_has... |
223 224 225 |
struct sock *sk2; struct alg_sock *ask2; struct hash_ctx *ctx2; |
4afa5f961 crypto: algif_has... |
226 |
bool more; |
fe869cdb8 crypto: algif_has... |
227 |
int err; |
4afa5f961 crypto: algif_has... |
228 229 230 231 |
lock_sock(sk); more = ctx->more; err = more ? crypto_ahash_export(req, state) : 0; release_sock(sk); |
fe869cdb8 crypto: algif_has... |
232 233 |
if (err) return err; |
cdfbabfb2 net: Work around ... |
234 |
err = af_alg_accept(ask->parent, newsock, kern); |
fe869cdb8 crypto: algif_has... |
235 236 237 238 239 240 |
if (err) return err; sk2 = newsock->sk; ask2 = alg_sk(sk2); ctx2 = ask2->private; |
4afa5f961 crypto: algif_has... |
241 242 243 244 |
ctx2->more = more; if (!more) return err; |
fe869cdb8 crypto: algif_has... |
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 |
err = crypto_ahash_import(&ctx2->req, state); if (err) { sock_orphan(sk2); sock_put(sk2); } return err; } static struct proto_ops algif_hash_ops = { .family = PF_ALG, .connect = sock_no_connect, .socketpair = sock_no_socketpair, .getname = sock_no_getname, .ioctl = sock_no_ioctl, .listen = sock_no_listen, .shutdown = sock_no_shutdown, .getsockopt = sock_no_getsockopt, .mmap = sock_no_mmap, .bind = sock_no_bind, .setsockopt = sock_no_setsockopt, |
fe869cdb8 crypto: algif_has... |
268 269 270 271 272 273 274 |
.release = af_alg_release, .sendmsg = hash_sendmsg, .sendpage = hash_sendpage, .recvmsg = hash_recvmsg, .accept = hash_accept, }; |
6de62f15b crypto: algif_has... |
275 276 |
static int hash_check_key(struct socket *sock) { |
ad46d7e33 crypto: algif_has... |
277 |
int err = 0; |
6de62f15b crypto: algif_has... |
278 279 |
struct sock *psk; struct alg_sock *pask; |
9fa68f620 crypto: hash - pr... |
280 |
struct crypto_ahash *tfm; |
6de62f15b crypto: algif_has... |
281 282 |
struct sock *sk = sock->sk; struct alg_sock *ask = alg_sk(sk); |
ad46d7e33 crypto: algif_has... |
283 |
lock_sock(sk); |
cc0f67835 crypto: af_alg - ... |
284 |
if (!atomic_read(&ask->nokey_refcnt)) |
ad46d7e33 crypto: algif_has... |
285 |
goto unlock_child; |
6de62f15b crypto: algif_has... |
286 287 288 289 290 291 |
psk = ask->parent; pask = alg_sk(ask->parent); tfm = pask->private; err = -ENOKEY; |
ad46d7e33 crypto: algif_has... |
292 |
lock_sock_nested(psk, SINGLE_DEPTH_NESTING); |
9fa68f620 crypto: hash - pr... |
293 |
if (crypto_ahash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) |
6de62f15b crypto: algif_has... |
294 |
goto unlock; |
cc0f67835 crypto: af_alg - ... |
295 296 |
atomic_dec(&pask->nokey_refcnt); atomic_set(&ask->nokey_refcnt, 0); |
6de62f15b crypto: algif_has... |
297 298 299 300 301 |
err = 0; unlock: release_sock(psk); |
ad46d7e33 crypto: algif_has... |
302 303 |
unlock_child: release_sock(sk); |
6de62f15b crypto: algif_has... |
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 |
return err; } static int hash_sendmsg_nokey(struct socket *sock, struct msghdr *msg, size_t size) { int err; err = hash_check_key(sock); if (err) return err; return hash_sendmsg(sock, msg, size); } static ssize_t hash_sendpage_nokey(struct socket *sock, struct page *page, int offset, size_t size, int flags) { int err; err = hash_check_key(sock); if (err) return err; return hash_sendpage(sock, page, offset, size, flags); } static int hash_recvmsg_nokey(struct socket *sock, struct msghdr *msg, size_t ignored, int flags) { int err; err = hash_check_key(sock); if (err) return err; return hash_recvmsg(sock, msg, ignored, flags); } static int hash_accept_nokey(struct socket *sock, struct socket *newsock, |
cdfbabfb2 net: Work around ... |
345 |
int flags, bool kern) |
6de62f15b crypto: algif_has... |
346 347 348 349 350 351 |
{ int err; err = hash_check_key(sock); if (err) return err; |
cdfbabfb2 net: Work around ... |
352 |
return hash_accept(sock, newsock, flags, kern); |
6de62f15b crypto: algif_has... |
353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 |
} static struct proto_ops algif_hash_ops_nokey = { .family = PF_ALG, .connect = sock_no_connect, .socketpair = sock_no_socketpair, .getname = sock_no_getname, .ioctl = sock_no_ioctl, .listen = sock_no_listen, .shutdown = sock_no_shutdown, .getsockopt = sock_no_getsockopt, .mmap = sock_no_mmap, .bind = sock_no_bind, .setsockopt = sock_no_setsockopt, |
6de62f15b crypto: algif_has... |
368 369 370 371 372 373 374 |
.release = af_alg_release, .sendmsg = hash_sendmsg_nokey, .sendpage = hash_sendpage_nokey, .recvmsg = hash_recvmsg_nokey, .accept = hash_accept_nokey, }; |
fe869cdb8 crypto: algif_has... |
375 376 |
static void *hash_bind(const char *name, u32 type, u32 mask) { |
9fa68f620 crypto: hash - pr... |
377 |
return crypto_alloc_ahash(name, type, mask); |
fe869cdb8 crypto: algif_has... |
378 379 380 381 |
} static void hash_release(void *private) { |
9fa68f620 crypto: hash - pr... |
382 |
crypto_free_ahash(private); |
fe869cdb8 crypto: algif_has... |
383 384 385 386 |
} static int hash_setkey(void *private, const u8 *key, unsigned int keylen) { |
9fa68f620 crypto: hash - pr... |
387 |
return crypto_ahash_setkey(private, key, keylen); |
fe869cdb8 crypto: algif_has... |
388 |
} |
f1d84af18 crypto: algif_has... |
389 |
static void hash_sock_destruct(struct sock *sk) |
fe869cdb8 crypto: algif_has... |
390 391 392 |
{ struct alg_sock *ask = alg_sk(sk); struct hash_ctx *ctx = ask->private; |
493b2ed3f crypto: algif_has... |
393 |
hash_free_result(sk, ctx); |
fe869cdb8 crypto: algif_has... |
394 |
sock_kfree_s(sk, ctx, ctx->len); |
6de62f15b crypto: algif_has... |
395 396 |
af_alg_release_parent(sk); } |
f1d84af18 crypto: algif_has... |
397 |
static int hash_accept_parent_nokey(void *private, struct sock *sk) |
fe869cdb8 crypto: algif_has... |
398 |
{ |
9fa68f620 crypto: hash - pr... |
399 |
struct crypto_ahash *tfm = private; |
fe869cdb8 crypto: algif_has... |
400 |
struct alg_sock *ask = alg_sk(sk); |
9fa68f620 crypto: hash - pr... |
401 402 |
struct hash_ctx *ctx; unsigned int len = sizeof(*ctx) + crypto_ahash_reqsize(tfm); |
fe869cdb8 crypto: algif_has... |
403 404 405 406 |
ctx = sock_kmalloc(sk, len, GFP_KERNEL); if (!ctx) return -ENOMEM; |
493b2ed3f crypto: algif_has... |
407 |
ctx->result = NULL; |
fe869cdb8 crypto: algif_has... |
408 409 |
ctx->len = len; ctx->more = 0; |
2c3f8b162 crypto: algif - m... |
410 |
crypto_init_wait(&ctx->wait); |
fe869cdb8 crypto: algif_has... |
411 412 |
ask->private = ctx; |
9fa68f620 crypto: hash - pr... |
413 |
ahash_request_set_tfm(&ctx->req, tfm); |
fe869cdb8 crypto: algif_has... |
414 |
ahash_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG, |
2c3f8b162 crypto: algif - m... |
415 |
crypto_req_done, &ctx->wait); |
fe869cdb8 crypto: algif_has... |
416 417 418 419 420 |
sk->sk_destruct = hash_sock_destruct; return 0; } |
6de62f15b crypto: algif_has... |
421 422 |
static int hash_accept_parent(void *private, struct sock *sk) { |
9fa68f620 crypto: hash - pr... |
423 |
struct crypto_ahash *tfm = private; |
6de62f15b crypto: algif_has... |
424 |
|
9fa68f620 crypto: hash - pr... |
425 |
if (crypto_ahash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY) |
6de62f15b crypto: algif_has... |
426 |
return -ENOKEY; |
f1d84af18 crypto: algif_has... |
427 |
return hash_accept_parent_nokey(private, sk); |
6de62f15b crypto: algif_has... |
428 |
} |
fe869cdb8 crypto: algif_has... |
429 430 431 432 433 |
static const struct af_alg_type algif_type_hash = { .bind = hash_bind, .release = hash_release, .setkey = hash_setkey, .accept = hash_accept_parent, |
6de62f15b crypto: algif_has... |
434 |
.accept_nokey = hash_accept_parent_nokey, |
fe869cdb8 crypto: algif_has... |
435 |
.ops = &algif_hash_ops, |
6de62f15b crypto: algif_has... |
436 |
.ops_nokey = &algif_hash_ops_nokey, |
fe869cdb8 crypto: algif_has... |
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 |
.name = "hash", .owner = THIS_MODULE }; static int __init algif_hash_init(void) { return af_alg_register_type(&algif_type_hash); } static void __exit algif_hash_exit(void) { int err = af_alg_unregister_type(&algif_type_hash); BUG_ON(err); } module_init(algif_hash_init); module_exit(algif_hash_exit); MODULE_LICENSE("GPL"); |