Blame view
crypto/authenc.c
19.6 KB
3c09f17c3 [CRYPTO] aead: Ad... |
1 2 3 4 5 6 7 8 9 10 11 |
/* * Authenc: Simple AEAD wrapper for IPsec * * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ |
e56dd5641 [CRYPTO] authenc:... |
12 |
#include <crypto/aead.h> |
5f7082ed4 crypto: hash - Ex... |
13 |
#include <crypto/internal/hash.h> |
9ffde35a8 [CRYPTO] authenc:... |
14 |
#include <crypto/internal/skcipher.h> |
e236d4a89 [CRYPTO] authenc:... |
15 |
#include <crypto/authenc.h> |
42c271c6c [CRYPTO] scatterw... |
16 |
#include <crypto/scatterwalk.h> |
3c09f17c3 [CRYPTO] aead: Ad... |
17 18 19 20 |
#include <linux/err.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> |
e236d4a89 [CRYPTO] authenc:... |
21 |
#include <linux/rtnetlink.h> |
3c09f17c3 [CRYPTO] aead: Ad... |
22 23 |
#include <linux/slab.h> #include <linux/spinlock.h> |
cbdcf80d8 crypto: authenc -... |
24 |
typedef u8 *(*authenc_ahash_t)(struct aead_request *req, unsigned int flags); |
3c09f17c3 [CRYPTO] aead: Ad... |
25 |
struct authenc_instance_ctx { |
cbdcf80d8 crypto: authenc -... |
26 |
struct crypto_ahash_spawn auth; |
9ffde35a8 [CRYPTO] authenc:... |
27 |
struct crypto_skcipher_spawn enc; |
3c09f17c3 [CRYPTO] aead: Ad... |
28 29 30 |
}; struct crypto_authenc_ctx { |
cbdcf80d8 crypto: authenc -... |
31 32 |
unsigned int reqoff; struct crypto_ahash *auth; |
3c09f17c3 [CRYPTO] aead: Ad... |
33 34 |
struct crypto_ablkcipher *enc; }; |
cbdcf80d8 crypto: authenc -... |
35 36 37 38 39 40 41 42 43 |
struct authenc_request_ctx { unsigned int cryptlen; struct scatterlist *sg; struct scatterlist asg[2]; struct scatterlist cipher[2]; crypto_completion_t complete; crypto_completion_t update_complete; char tail[]; }; |
180ce7e81 crypto: authenc -... |
44 45 46 47 48 |
static void authenc_request_complete(struct aead_request *req, int err) { if (err != -EINPROGRESS) aead_request_complete(req, err); } |
3c09f17c3 [CRYPTO] aead: Ad... |
49 50 51 |
static int crypto_authenc_setkey(struct crypto_aead *authenc, const u8 *key, unsigned int keylen) { |
3c09f17c3 [CRYPTO] aead: Ad... |
52 |
unsigned int authkeylen; |
e236d4a89 [CRYPTO] authenc:... |
53 |
unsigned int enckeylen; |
3c09f17c3 [CRYPTO] aead: Ad... |
54 |
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); |
cbdcf80d8 crypto: authenc -... |
55 |
struct crypto_ahash *auth = ctx->auth; |
3c09f17c3 [CRYPTO] aead: Ad... |
56 |
struct crypto_ablkcipher *enc = ctx->enc; |
e236d4a89 [CRYPTO] authenc:... |
57 58 |
struct rtattr *rta = (void *)key; struct crypto_authenc_key_param *param; |
3c09f17c3 [CRYPTO] aead: Ad... |
59 |
int err = -EINVAL; |
12dc5e62b [CRYPTO] authenc:... |
60 |
if (!RTA_OK(rta, keylen)) |
e236d4a89 [CRYPTO] authenc:... |
61 62 63 64 65 66 67 68 69 70 71 72 73 74 |
goto badkey; if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) goto badkey; if (RTA_PAYLOAD(rta) < sizeof(*param)) goto badkey; param = RTA_DATA(rta); enckeylen = be32_to_cpu(param->enckeylen); key += RTA_ALIGN(rta->rta_len); keylen -= RTA_ALIGN(rta->rta_len); if (keylen < enckeylen) goto badkey; |
3c09f17c3 [CRYPTO] aead: Ad... |
75 |
authkeylen = keylen - enckeylen; |
cbdcf80d8 crypto: authenc -... |
76 77 |
crypto_ahash_clear_flags(auth, CRYPTO_TFM_REQ_MASK); crypto_ahash_set_flags(auth, crypto_aead_get_flags(authenc) & |
3c09f17c3 [CRYPTO] aead: Ad... |
78 |
CRYPTO_TFM_REQ_MASK); |
cbdcf80d8 crypto: authenc -... |
79 80 |
err = crypto_ahash_setkey(auth, key, authkeylen); crypto_aead_set_flags(authenc, crypto_ahash_get_flags(auth) & |
3c09f17c3 [CRYPTO] aead: Ad... |
81 82 83 84 85 86 87 88 89 90 91 92 93 94 |
CRYPTO_TFM_RES_MASK); if (err) goto out; crypto_ablkcipher_clear_flags(enc, CRYPTO_TFM_REQ_MASK); crypto_ablkcipher_set_flags(enc, crypto_aead_get_flags(authenc) & CRYPTO_TFM_REQ_MASK); err = crypto_ablkcipher_setkey(enc, key + authkeylen, enckeylen); crypto_aead_set_flags(authenc, crypto_ablkcipher_get_flags(enc) & CRYPTO_TFM_RES_MASK); out: return err; |
e236d4a89 [CRYPTO] authenc:... |
95 96 97 98 |
badkey: crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN); goto out; |
3c09f17c3 [CRYPTO] aead: Ad... |
99 |
} |
cbdcf80d8 crypto: authenc -... |
100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 |
static void authenc_geniv_ahash_update_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); if (err) goto out; ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result, areq_ctx->cryptlen); ahash_request_set_callback(ahreq, aead_request_flags(req) & CRYPTO_TFM_REQ_MAY_SLEEP, areq_ctx->complete, req); err = crypto_ahash_finup(ahreq); if (err) goto out; scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg, areq_ctx->cryptlen, crypto_aead_authsize(authenc), 1); out: |
180ce7e81 crypto: authenc -... |
127 |
authenc_request_complete(req, err); |
cbdcf80d8 crypto: authenc -... |
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 |
} static void authenc_geniv_ahash_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); if (err) goto out; scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg, areq_ctx->cryptlen, crypto_aead_authsize(authenc), 1); out: aead_request_complete(req, err); } static void authenc_verify_ahash_update_done(struct crypto_async_request *areq, int err) |
3c09f17c3 [CRYPTO] aead: Ad... |
151 |
{ |
cbdcf80d8 crypto: authenc -... |
152 153 154 155 |
u8 *ihash; unsigned int authsize; struct ablkcipher_request *abreq; struct aead_request *req = areq->data; |
3c09f17c3 [CRYPTO] aead: Ad... |
156 |
struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
3c09f17c3 [CRYPTO] aead: Ad... |
157 |
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); |
cbdcf80d8 crypto: authenc -... |
158 159 |
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); |
921bae546 crypto: authenc -... |
160 |
unsigned int cryptlen = req->cryptlen; |
cbdcf80d8 crypto: authenc -... |
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 |
if (err) goto out; ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result, areq_ctx->cryptlen); ahash_request_set_callback(ahreq, aead_request_flags(req) & CRYPTO_TFM_REQ_MAY_SLEEP, areq_ctx->complete, req); err = crypto_ahash_finup(ahreq); if (err) goto out; authsize = crypto_aead_authsize(authenc); |
921bae546 crypto: authenc -... |
176 |
cryptlen -= authsize; |
cbdcf80d8 crypto: authenc -... |
177 178 179 |
ihash = ahreq->result + authsize; scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, authsize, 0); |
f3542e6d7 crypto: authenc -... |
180 |
err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG : 0; |
cbdcf80d8 crypto: authenc -... |
181 182 183 184 185 186 187 188 |
if (err) goto out; abreq = aead_request_ctx(req); ablkcipher_request_set_tfm(abreq, ctx->enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), req->base.complete, req->base.data); ablkcipher_request_set_crypt(abreq, req->src, req->dst, |
921bae546 crypto: authenc -... |
189 |
cryptlen, req->iv); |
cbdcf80d8 crypto: authenc -... |
190 191 192 193 |
err = crypto_ablkcipher_decrypt(abreq); out: |
180ce7e81 crypto: authenc -... |
194 |
authenc_request_complete(req, err); |
cbdcf80d8 crypto: authenc -... |
195 196 197 198 199 200 201 202 203 204 205 206 207 |
} static void authenc_verify_ahash_done(struct crypto_async_request *areq, int err) { u8 *ihash; unsigned int authsize; struct ablkcipher_request *abreq; struct aead_request *req = areq->data; struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); |
921bae546 crypto: authenc -... |
208 |
unsigned int cryptlen = req->cryptlen; |
cbdcf80d8 crypto: authenc -... |
209 210 211 212 213 |
if (err) goto out; authsize = crypto_aead_authsize(authenc); |
921bae546 crypto: authenc -... |
214 |
cryptlen -= authsize; |
cbdcf80d8 crypto: authenc -... |
215 216 217 |
ihash = ahreq->result + authsize; scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, authsize, 0); |
f3542e6d7 crypto: authenc -... |
218 |
err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG : 0; |
cbdcf80d8 crypto: authenc -... |
219 220 221 222 223 224 225 226 |
if (err) goto out; abreq = aead_request_ctx(req); ablkcipher_request_set_tfm(abreq, ctx->enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), req->base.complete, req->base.data); ablkcipher_request_set_crypt(abreq, req->src, req->dst, |
921bae546 crypto: authenc -... |
227 |
cryptlen, req->iv); |
cbdcf80d8 crypto: authenc -... |
228 229 230 231 |
err = crypto_ablkcipher_decrypt(abreq); out: |
180ce7e81 crypto: authenc -... |
232 |
authenc_request_complete(req, err); |
cbdcf80d8 crypto: authenc -... |
233 234 235 236 237 238 239 240 241 242 |
} static u8 *crypto_authenc_ahash_fb(struct aead_request *req, unsigned int flags) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct crypto_ahash *auth = ctx->auth; struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); u8 *hash = areq_ctx->tail; |
3c09f17c3 [CRYPTO] aead: Ad... |
243 |
int err; |
cbdcf80d8 crypto: authenc -... |
244 245 246 247 |
hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), crypto_ahash_alignmask(auth) + 1); ahash_request_set_tfm(ahreq, auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
248 |
|
cbdcf80d8 crypto: authenc -... |
249 |
err = crypto_ahash_init(ahreq); |
3c09f17c3 [CRYPTO] aead: Ad... |
250 |
if (err) |
cbdcf80d8 crypto: authenc -... |
251 252 253 254 255 |
return ERR_PTR(err); ahash_request_set_crypt(ahreq, req->assoc, hash, req->assoclen); ahash_request_set_callback(ahreq, aead_request_flags(req) & flags, areq_ctx->update_complete, req); |
3c09f17c3 [CRYPTO] aead: Ad... |
256 |
|
cbdcf80d8 crypto: authenc -... |
257 |
err = crypto_ahash_update(ahreq); |
3c09f17c3 [CRYPTO] aead: Ad... |
258 |
if (err) |
cbdcf80d8 crypto: authenc -... |
259 260 261 262 263 264 |
return ERR_PTR(err); ahash_request_set_crypt(ahreq, areq_ctx->sg, hash, areq_ctx->cryptlen); ahash_request_set_callback(ahreq, aead_request_flags(req) & flags, areq_ctx->complete, req); |
3c09f17c3 [CRYPTO] aead: Ad... |
265 |
|
cbdcf80d8 crypto: authenc -... |
266 |
err = crypto_ahash_finup(ahreq); |
3c09f17c3 [CRYPTO] aead: Ad... |
267 |
if (err) |
cbdcf80d8 crypto: authenc -... |
268 |
return ERR_PTR(err); |
3c09f17c3 [CRYPTO] aead: Ad... |
269 |
|
cbdcf80d8 crypto: authenc -... |
270 271 272 273 274 275 276 277 278 279 280 281 |
return hash; } static u8 *crypto_authenc_ahash(struct aead_request *req, unsigned int flags) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct crypto_ahash *auth = ctx->auth; struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); u8 *hash = areq_ctx->tail; int err; |
3c09f17c3 [CRYPTO] aead: Ad... |
282 |
|
cbdcf80d8 crypto: authenc -... |
283 284 285 286 287 288 289 290 291 292 |
hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), crypto_ahash_alignmask(auth) + 1); ahash_request_set_tfm(ahreq, auth); ahash_request_set_crypt(ahreq, areq_ctx->sg, hash, areq_ctx->cryptlen); ahash_request_set_callback(ahreq, aead_request_flags(req) & flags, areq_ctx->complete, req); err = crypto_ahash_digest(ahreq); |
3c09f17c3 [CRYPTO] aead: Ad... |
293 |
if (err) |
7c3d703fa [CRYPTO] authenc:... |
294 295 296 297 |
return ERR_PTR(err); return hash; } |
e56dd5641 [CRYPTO] authenc:... |
298 299 |
static int crypto_authenc_genicv(struct aead_request *req, u8 *iv, unsigned int flags) |
7c3d703fa [CRYPTO] authenc:... |
300 301 |
{ struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
cbdcf80d8 crypto: authenc -... |
302 |
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); |
7c3d703fa [CRYPTO] authenc:... |
303 |
struct scatterlist *dst = req->dst; |
cbdcf80d8 crypto: authenc -... |
304 305 306 |
struct scatterlist *assoc = req->assoc; struct scatterlist *cipher = areq_ctx->cipher; struct scatterlist *asg = areq_ctx->asg; |
e56dd5641 [CRYPTO] authenc:... |
307 |
unsigned int ivsize = crypto_aead_ivsize(authenc); |
cbdcf80d8 crypto: authenc -... |
308 309 310 |
unsigned int cryptlen = req->cryptlen; authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb; struct page *dstp; |
e56dd5641 [CRYPTO] authenc:... |
311 |
u8 *vdst; |
7c3d703fa [CRYPTO] authenc:... |
312 |
u8 *hash; |
e56dd5641 [CRYPTO] authenc:... |
313 314 |
dstp = sg_page(dst); vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset; |
29b37f421 crypto: authenc -... |
315 316 317 |
if (ivsize) { sg_init_table(cipher, 2); sg_set_buf(cipher, iv, ivsize); |
c920fa605 crypto: Use scatt... |
318 |
scatterwalk_crypto_chain(cipher, dst, vdst == iv + ivsize, 2); |
29b37f421 crypto: authenc -... |
319 |
dst = cipher; |
cbdcf80d8 crypto: authenc -... |
320 |
cryptlen += ivsize; |
29b37f421 crypto: authenc -... |
321 |
} |
e56dd5641 [CRYPTO] authenc:... |
322 |
|
9b2f4cb65 crypto: authenc -... |
323 |
if (req->assoclen && sg_is_last(assoc)) { |
cbdcf80d8 crypto: authenc -... |
324 325 326 |
authenc_ahash_fn = crypto_authenc_ahash; sg_init_table(asg, 2); sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset); |
c920fa605 crypto: Use scatt... |
327 |
scatterwalk_crypto_chain(asg, dst, 0, 2); |
cbdcf80d8 crypto: authenc -... |
328 329 330 331 332 333 334 335 336 337 338 |
dst = asg; cryptlen += req->assoclen; } areq_ctx->cryptlen = cryptlen; areq_ctx->sg = dst; areq_ctx->complete = authenc_geniv_ahash_done; areq_ctx->update_complete = authenc_geniv_ahash_update_done; hash = authenc_ahash_fn(req, flags); |
7c3d703fa [CRYPTO] authenc:... |
339 340 |
if (IS_ERR(hash)) return PTR_ERR(hash); |
3c09f17c3 [CRYPTO] aead: Ad... |
341 |
|
29b37f421 crypto: authenc -... |
342 |
scatterwalk_map_and_copy(hash, dst, cryptlen, |
7ba683a6d [CRYPTO] aead: Ma... |
343 |
crypto_aead_authsize(authenc), 1); |
3c09f17c3 [CRYPTO] aead: Ad... |
344 345 346 347 348 349 |
return 0; } static void crypto_authenc_encrypt_done(struct crypto_async_request *req, int err) { |
a697690be crypto: authenc -... |
350 |
struct aead_request *areq = req->data; |
e56dd5641 [CRYPTO] authenc:... |
351 |
if (!err) { |
e56dd5641 [CRYPTO] authenc:... |
352 353 354 355 356 357 358 359 |
struct crypto_aead *authenc = crypto_aead_reqtfm(areq); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct ablkcipher_request *abreq = aead_request_ctx(areq); u8 *iv = (u8 *)(abreq + 1) + crypto_ablkcipher_reqsize(ctx->enc); err = crypto_authenc_genicv(areq, iv, 0); } |
3c09f17c3 [CRYPTO] aead: Ad... |
360 |
|
180ce7e81 crypto: authenc -... |
361 |
authenc_request_complete(areq, err); |
3c09f17c3 [CRYPTO] aead: Ad... |
362 363 364 365 366 367 |
} static int crypto_authenc_encrypt(struct aead_request *req) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); |
50beceba7 crypto: authenc -... |
368 |
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); |
e56dd5641 [CRYPTO] authenc:... |
369 370 371 |
struct crypto_ablkcipher *enc = ctx->enc; struct scatterlist *dst = req->dst; unsigned int cryptlen = req->cryptlen; |
50beceba7 crypto: authenc -... |
372 373 374 |
struct ablkcipher_request *abreq = (void *)(areq_ctx->tail + ctx->reqoff); u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(enc); |
3c09f17c3 [CRYPTO] aead: Ad... |
375 |
int err; |
e56dd5641 [CRYPTO] authenc:... |
376 |
ablkcipher_request_set_tfm(abreq, enc); |
3c09f17c3 [CRYPTO] aead: Ad... |
377 378 |
ablkcipher_request_set_callback(abreq, aead_request_flags(req), crypto_authenc_encrypt_done, req); |
e56dd5641 [CRYPTO] authenc:... |
379 380 381 |
ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv); memcpy(iv, req->iv, crypto_aead_ivsize(authenc)); |
3c09f17c3 [CRYPTO] aead: Ad... |
382 383 384 385 |
err = crypto_ablkcipher_encrypt(abreq); if (err) return err; |
e56dd5641 [CRYPTO] authenc:... |
386 387 388 389 390 391 |
return crypto_authenc_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP); } static void crypto_authenc_givencrypt_done(struct crypto_async_request *req, int err) { |
a697690be crypto: authenc -... |
392 |
struct aead_request *areq = req->data; |
e56dd5641 [CRYPTO] authenc:... |
393 |
if (!err) { |
161613293 [CRYPTO] authenc:... |
394 |
struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); |
e56dd5641 [CRYPTO] authenc:... |
395 |
|
161613293 [CRYPTO] authenc:... |
396 |
err = crypto_authenc_genicv(areq, greq->giv, 0); |
e56dd5641 [CRYPTO] authenc:... |
397 |
} |
180ce7e81 crypto: authenc -... |
398 |
authenc_request_complete(areq, err); |
e56dd5641 [CRYPTO] authenc:... |
399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 |
} static int crypto_authenc_givencrypt(struct aead_givcrypt_request *req) { struct crypto_aead *authenc = aead_givcrypt_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct aead_request *areq = &req->areq; struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); u8 *iv = req->giv; int err; skcipher_givcrypt_set_tfm(greq, ctx->enc); skcipher_givcrypt_set_callback(greq, aead_request_flags(areq), crypto_authenc_givencrypt_done, areq); skcipher_givcrypt_set_crypt(greq, areq->src, areq->dst, areq->cryptlen, areq->iv); skcipher_givcrypt_set_giv(greq, iv, req->seq); err = crypto_skcipher_givencrypt(greq); if (err) return err; return crypto_authenc_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP); |
3c09f17c3 [CRYPTO] aead: Ad... |
422 |
} |
481f34ae7 [CRYPTO] authenc:... |
423 |
static int crypto_authenc_verify(struct aead_request *req, |
cbdcf80d8 crypto: authenc -... |
424 |
authenc_ahash_t authenc_ahash_fn) |
3c09f17c3 [CRYPTO] aead: Ad... |
425 426 |
{ struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
cbdcf80d8 crypto: authenc -... |
427 |
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); |
7c3d703fa [CRYPTO] authenc:... |
428 |
u8 *ohash; |
3c09f17c3 [CRYPTO] aead: Ad... |
429 |
u8 *ihash; |
3c09f17c3 [CRYPTO] aead: Ad... |
430 |
unsigned int authsize; |
3c09f17c3 [CRYPTO] aead: Ad... |
431 |
|
cbdcf80d8 crypto: authenc -... |
432 |
areq_ctx->complete = authenc_verify_ahash_done; |
77ba115c4 crypto: authenc -... |
433 |
areq_ctx->update_complete = authenc_verify_ahash_update_done; |
cbdcf80d8 crypto: authenc -... |
434 435 |
ohash = authenc_ahash_fn(req, CRYPTO_TFM_REQ_MAY_SLEEP); |
7c3d703fa [CRYPTO] authenc:... |
436 437 |
if (IS_ERR(ohash)) return PTR_ERR(ohash); |
3c09f17c3 [CRYPTO] aead: Ad... |
438 |
|
7ba683a6d [CRYPTO] aead: Ma... |
439 |
authsize = crypto_aead_authsize(authenc); |
7c3d703fa [CRYPTO] authenc:... |
440 |
ihash = ohash + authsize; |
cbdcf80d8 crypto: authenc -... |
441 442 |
scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, authsize, 0); |
f3542e6d7 crypto: authenc -... |
443 |
return memcmp(ihash, ohash, authsize) ? -EBADMSG : 0; |
3c09f17c3 [CRYPTO] aead: Ad... |
444 |
} |
e56dd5641 [CRYPTO] authenc:... |
445 446 |
static int crypto_authenc_iverify(struct aead_request *req, u8 *iv, unsigned int cryptlen) |
3c09f17c3 [CRYPTO] aead: Ad... |
447 |
{ |
e56dd5641 [CRYPTO] authenc:... |
448 |
struct crypto_aead *authenc = crypto_aead_reqtfm(req); |
cbdcf80d8 crypto: authenc -... |
449 |
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); |
e56dd5641 [CRYPTO] authenc:... |
450 |
struct scatterlist *src = req->src; |
cbdcf80d8 crypto: authenc -... |
451 452 453 |
struct scatterlist *assoc = req->assoc; struct scatterlist *cipher = areq_ctx->cipher; struct scatterlist *asg = areq_ctx->asg; |
e56dd5641 [CRYPTO] authenc:... |
454 |
unsigned int ivsize = crypto_aead_ivsize(authenc); |
cbdcf80d8 crypto: authenc -... |
455 456 |
authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb; struct page *srcp; |
e56dd5641 [CRYPTO] authenc:... |
457 458 459 460 |
u8 *vsrc; srcp = sg_page(src); vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset; |
29b37f421 crypto: authenc -... |
461 462 463 |
if (ivsize) { sg_init_table(cipher, 2); sg_set_buf(cipher, iv, ivsize); |
c920fa605 crypto: Use scatt... |
464 |
scatterwalk_crypto_chain(cipher, src, vsrc == iv + ivsize, 2); |
29b37f421 crypto: authenc -... |
465 |
src = cipher; |
cbdcf80d8 crypto: authenc -... |
466 467 |
cryptlen += ivsize; } |
9b2f4cb65 crypto: authenc -... |
468 |
if (req->assoclen && sg_is_last(assoc)) { |
cbdcf80d8 crypto: authenc -... |
469 470 471 |
authenc_ahash_fn = crypto_authenc_ahash; sg_init_table(asg, 2); sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset); |
c920fa605 crypto: Use scatt... |
472 |
scatterwalk_crypto_chain(asg, src, 0, 2); |
cbdcf80d8 crypto: authenc -... |
473 474 |
src = asg; cryptlen += req->assoclen; |
29b37f421 crypto: authenc -... |
475 |
} |
e56dd5641 [CRYPTO] authenc:... |
476 |
|
cbdcf80d8 crypto: authenc -... |
477 478 479 480 |
areq_ctx->cryptlen = cryptlen; areq_ctx->sg = src; return crypto_authenc_verify(req, authenc_ahash_fn); |
3c09f17c3 [CRYPTO] aead: Ad... |
481 482 483 484 485 486 487 |
} static int crypto_authenc_decrypt(struct aead_request *req) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct ablkcipher_request *abreq = aead_request_ctx(req); |
481f34ae7 [CRYPTO] authenc:... |
488 489 |
unsigned int cryptlen = req->cryptlen; unsigned int authsize = crypto_aead_authsize(authenc); |
e56dd5641 [CRYPTO] authenc:... |
490 |
u8 *iv = req->iv; |
3c09f17c3 [CRYPTO] aead: Ad... |
491 |
int err; |
481f34ae7 [CRYPTO] authenc:... |
492 493 494 |
if (cryptlen < authsize) return -EINVAL; cryptlen -= authsize; |
e56dd5641 [CRYPTO] authenc:... |
495 |
err = crypto_authenc_iverify(req, iv, cryptlen); |
3c09f17c3 [CRYPTO] aead: Ad... |
496 497 498 499 500 |
if (err) return err; ablkcipher_request_set_tfm(abreq, ctx->enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), |
e56dd5641 [CRYPTO] authenc:... |
501 502 |
req->base.complete, req->base.data); ablkcipher_request_set_crypt(abreq, req->src, req->dst, cryptlen, iv); |
3c09f17c3 [CRYPTO] aead: Ad... |
503 504 505 506 507 508 |
return crypto_ablkcipher_decrypt(abreq); } static int crypto_authenc_init_tfm(struct crypto_tfm *tfm) { |
cbdcf80d8 crypto: authenc -... |
509 |
struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); |
3c09f17c3 [CRYPTO] aead: Ad... |
510 511 |
struct authenc_instance_ctx *ictx = crypto_instance_ctx(inst); struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm); |
cbdcf80d8 crypto: authenc -... |
512 |
struct crypto_ahash *auth; |
3c09f17c3 [CRYPTO] aead: Ad... |
513 |
struct crypto_ablkcipher *enc; |
3c09f17c3 [CRYPTO] aead: Ad... |
514 |
int err; |
cbdcf80d8 crypto: authenc -... |
515 |
auth = crypto_spawn_ahash(&ictx->auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
516 517 |
if (IS_ERR(auth)) return PTR_ERR(auth); |
9ffde35a8 [CRYPTO] authenc:... |
518 |
enc = crypto_spawn_skcipher(&ictx->enc); |
3c09f17c3 [CRYPTO] aead: Ad... |
519 520 |
err = PTR_ERR(enc); if (IS_ERR(enc)) |
cbdcf80d8 crypto: authenc -... |
521 |
goto err_free_ahash; |
3c09f17c3 [CRYPTO] aead: Ad... |
522 523 524 |
ctx->auth = auth; ctx->enc = enc; |
f3542e6d7 crypto: authenc -... |
525 |
|
50beceba7 crypto: authenc -... |
526 527 528 529 530 531 532 533 534 |
ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth) + crypto_ahash_alignmask(auth), crypto_ahash_alignmask(auth) + 1) + crypto_ablkcipher_ivsize(enc); tfm->crt_aead.reqsize = sizeof(struct authenc_request_ctx) + ctx->reqoff + max_t(unsigned int, crypto_ahash_reqsize(auth) + |
f3542e6d7 crypto: authenc -... |
535 |
sizeof(struct ahash_request), |
cbdcf80d8 crypto: authenc -... |
536 |
sizeof(struct skcipher_givcrypt_request) + |
50beceba7 crypto: authenc -... |
537 |
crypto_ablkcipher_reqsize(enc)); |
3c09f17c3 [CRYPTO] aead: Ad... |
538 539 |
return 0; |
cbdcf80d8 crypto: authenc -... |
540 541 |
err_free_ahash: crypto_free_ahash(auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
542 543 544 545 546 547 |
return err; } static void crypto_authenc_exit_tfm(struct crypto_tfm *tfm) { struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm); |
cbdcf80d8 crypto: authenc -... |
548 |
crypto_free_ahash(ctx->auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
549 550 551 552 553 |
crypto_free_ablkcipher(ctx->enc); } static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb) { |
9ffde35a8 [CRYPTO] authenc:... |
554 |
struct crypto_attr_type *algt; |
3c09f17c3 [CRYPTO] aead: Ad... |
555 |
struct crypto_instance *inst; |
cbdcf80d8 crypto: authenc -... |
556 557 |
struct hash_alg_common *auth; struct crypto_alg *auth_base; |
3c09f17c3 [CRYPTO] aead: Ad... |
558 559 |
struct crypto_alg *enc; struct authenc_instance_ctx *ctx; |
9ffde35a8 [CRYPTO] authenc:... |
560 |
const char *enc_name; |
3c09f17c3 [CRYPTO] aead: Ad... |
561 |
int err; |
9ffde35a8 [CRYPTO] authenc:... |
562 |
algt = crypto_get_attr_type(tb); |
9ffde35a8 [CRYPTO] authenc:... |
563 |
if (IS_ERR(algt)) |
3e8afe35c crypto: use ERR_CAST |
564 |
return ERR_CAST(algt); |
3c09f17c3 [CRYPTO] aead: Ad... |
565 |
|
9ffde35a8 [CRYPTO] authenc:... |
566 567 |
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) return ERR_PTR(-EINVAL); |
cbdcf80d8 crypto: authenc -... |
568 569 |
auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH, CRYPTO_ALG_TYPE_AHASH_MASK); |
3c09f17c3 [CRYPTO] aead: Ad... |
570 |
if (IS_ERR(auth)) |
8db050786 crypto: Use ERR_CAST |
571 |
return ERR_CAST(auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
572 |
|
cbdcf80d8 crypto: authenc -... |
573 |
auth_base = &auth->base; |
9ffde35a8 [CRYPTO] authenc:... |
574 575 576 |
enc_name = crypto_attr_alg_name(tb[2]); err = PTR_ERR(enc_name); if (IS_ERR(enc_name)) |
3c09f17c3 [CRYPTO] aead: Ad... |
577 |
goto out_put_auth; |
3c09f17c3 [CRYPTO] aead: Ad... |
578 579 580 |
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); err = -ENOMEM; if (!inst) |
9ffde35a8 [CRYPTO] authenc:... |
581 |
goto out_put_auth; |
3c09f17c3 [CRYPTO] aead: Ad... |
582 583 |
ctx = crypto_instance_ctx(inst); |
3c09f17c3 [CRYPTO] aead: Ad... |
584 |
|
cbdcf80d8 crypto: authenc -... |
585 |
err = crypto_init_ahash_spawn(&ctx->auth, auth, inst); |
3c09f17c3 [CRYPTO] aead: Ad... |
586 587 |
if (err) goto err_free_inst; |
9ffde35a8 [CRYPTO] authenc:... |
588 589 590 591 |
crypto_set_skcipher_spawn(&ctx->enc, inst); err = crypto_grab_skcipher(&ctx->enc, enc_name, 0, crypto_requires_sync(algt->type, algt->mask)); |
3c09f17c3 [CRYPTO] aead: Ad... |
592 593 |
if (err) goto err_drop_auth; |
9ffde35a8 [CRYPTO] authenc:... |
594 595 596 597 |
enc = crypto_skcipher_spawn_alg(&ctx->enc); err = -ENAMETOOLONG; if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, |
cbdcf80d8 crypto: authenc -... |
598 |
"authenc(%s,%s)", auth_base->cra_name, enc->cra_name) >= |
9ffde35a8 [CRYPTO] authenc:... |
599 600 601 602 |
CRYPTO_MAX_ALG_NAME) goto err_drop_enc; if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
cbdcf80d8 crypto: authenc -... |
603 |
"authenc(%s,%s)", auth_base->cra_driver_name, |
9ffde35a8 [CRYPTO] authenc:... |
604 605 606 607 608 |
enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) goto err_drop_enc; inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD; inst->alg.cra_flags |= enc->cra_flags & CRYPTO_ALG_ASYNC; |
cbdcf80d8 crypto: authenc -... |
609 610 |
inst->alg.cra_priority = enc->cra_priority * 10 + auth_base->cra_priority; |
3c09f17c3 [CRYPTO] aead: Ad... |
611 |
inst->alg.cra_blocksize = enc->cra_blocksize; |
cbdcf80d8 crypto: authenc -... |
612 |
inst->alg.cra_alignmask = auth_base->cra_alignmask | enc->cra_alignmask; |
3c09f17c3 [CRYPTO] aead: Ad... |
613 |
inst->alg.cra_type = &crypto_aead_type; |
c2c61f513 [CRYPTO] authenc:... |
614 |
inst->alg.cra_aead.ivsize = enc->cra_ablkcipher.ivsize; |
cbdcf80d8 crypto: authenc -... |
615 |
inst->alg.cra_aead.maxauthsize = auth->digestsize; |
3c09f17c3 [CRYPTO] aead: Ad... |
616 617 618 619 620 621 622 623 624 |
inst->alg.cra_ctxsize = sizeof(struct crypto_authenc_ctx); inst->alg.cra_init = crypto_authenc_init_tfm; inst->alg.cra_exit = crypto_authenc_exit_tfm; inst->alg.cra_aead.setkey = crypto_authenc_setkey; inst->alg.cra_aead.encrypt = crypto_authenc_encrypt; inst->alg.cra_aead.decrypt = crypto_authenc_decrypt; |
e56dd5641 [CRYPTO] authenc:... |
625 |
inst->alg.cra_aead.givencrypt = crypto_authenc_givencrypt; |
3c09f17c3 [CRYPTO] aead: Ad... |
626 627 |
out: |
cbdcf80d8 crypto: authenc -... |
628 |
crypto_mod_put(auth_base); |
3c09f17c3 [CRYPTO] aead: Ad... |
629 |
return inst; |
9ffde35a8 [CRYPTO] authenc:... |
630 631 |
err_drop_enc: crypto_drop_skcipher(&ctx->enc); |
3c09f17c3 [CRYPTO] aead: Ad... |
632 |
err_drop_auth: |
cbdcf80d8 crypto: authenc -... |
633 |
crypto_drop_ahash(&ctx->auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
634 635 |
err_free_inst: kfree(inst); |
9ffde35a8 [CRYPTO] authenc:... |
636 |
out_put_auth: |
3c09f17c3 [CRYPTO] aead: Ad... |
637 638 639 640 641 642 643 |
inst = ERR_PTR(err); goto out; } static void crypto_authenc_free(struct crypto_instance *inst) { struct authenc_instance_ctx *ctx = crypto_instance_ctx(inst); |
9ffde35a8 [CRYPTO] authenc:... |
644 |
crypto_drop_skcipher(&ctx->enc); |
cbdcf80d8 crypto: authenc -... |
645 |
crypto_drop_ahash(&ctx->auth); |
3c09f17c3 [CRYPTO] aead: Ad... |
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 |
kfree(inst); } static struct crypto_template crypto_authenc_tmpl = { .name = "authenc", .alloc = crypto_authenc_alloc, .free = crypto_authenc_free, .module = THIS_MODULE, }; static int __init crypto_authenc_module_init(void) { return crypto_register_template(&crypto_authenc_tmpl); } static void __exit crypto_authenc_module_exit(void) { crypto_unregister_template(&crypto_authenc_tmpl); } module_init(crypto_authenc_module_init); module_exit(crypto_authenc_module_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Simple AEAD wrapper for IPsec"); |