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* authencesn.c - AEAD wrapper for IPsec with extended sequence numbers,
3
* derived from authenc.c
5
* Copyright (C) 2010 secunet Security Networks AG
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* Copyright (C) 2010 Steffen Klassert <steffen.klassert@secunet.com>
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
15
#include <crypto/aead.h>
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#include <crypto/internal/hash.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/authenc.h>
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#include <crypto/scatterwalk.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/rtnetlink.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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struct authenc_esn_instance_ctx {
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struct crypto_ahash_spawn auth;
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struct crypto_skcipher_spawn enc;
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struct crypto_authenc_esn_ctx {
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struct crypto_ahash *auth;
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struct crypto_ablkcipher *enc;
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struct authenc_esn_request_ctx {
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unsigned int cryptlen;
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struct scatterlist *sg;
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struct scatterlist hsg[2];
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struct scatterlist tsg[1];
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struct scatterlist cipher[2];
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crypto_completion_t complete;
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crypto_completion_t update_complete;
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crypto_completion_t update_complete2;
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static void authenc_esn_request_complete(struct aead_request *req, int err)
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if (err != -EINPROGRESS)
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aead_request_complete(req, err);
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static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *key,
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unsigned int authkeylen;
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unsigned int enckeylen;
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct crypto_ahash *auth = ctx->auth;
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struct crypto_ablkcipher *enc = ctx->enc;
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struct rtattr *rta = (void *)key;
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struct crypto_authenc_key_param *param;
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if (!RTA_OK(rta, keylen))
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if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
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if (RTA_PAYLOAD(rta) < sizeof(*param))
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param = RTA_DATA(rta);
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enckeylen = be32_to_cpu(param->enckeylen);
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key += RTA_ALIGN(rta->rta_len);
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keylen -= RTA_ALIGN(rta->rta_len);
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if (keylen < enckeylen)
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authkeylen = keylen - enckeylen;
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crypto_ahash_clear_flags(auth, CRYPTO_TFM_REQ_MASK);
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crypto_ahash_set_flags(auth, crypto_aead_get_flags(authenc_esn) &
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err = crypto_ahash_setkey(auth, key, authkeylen);
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crypto_aead_set_flags(authenc_esn, crypto_ahash_get_flags(auth) &
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crypto_ablkcipher_clear_flags(enc, CRYPTO_TFM_REQ_MASK);
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crypto_ablkcipher_set_flags(enc, crypto_aead_get_flags(authenc_esn) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_ablkcipher_setkey(enc, key + authkeylen, enckeylen);
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crypto_aead_set_flags(authenc_esn, crypto_ablkcipher_get_flags(enc) &
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CRYPTO_TFM_RES_MASK);
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crypto_aead_set_flags(authenc_esn, CRYPTO_TFM_RES_BAD_KEY_LEN);
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static void authenc_esn_geniv_ahash_update_done(struct crypto_async_request *areq,
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result,
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->update_complete2, req);
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err = crypto_ahash_update(ahreq);
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
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crypto_aead_authsize(authenc_esn), 1);
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authenc_esn_request_complete(req, err);
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static void authenc_esn_geniv_ahash_update_done2(struct crypto_async_request *areq,
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
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crypto_aead_authsize(authenc_esn), 1);
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authenc_esn_request_complete(req, err);
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static void authenc_esn_geniv_ahash_done(struct crypto_async_request *areq,
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
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crypto_aead_authsize(authenc_esn), 1);
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aead_request_complete(req, err);
206
static void authenc_esn_verify_ahash_update_done(struct crypto_async_request *areq,
210
unsigned int authsize;
211
struct ablkcipher_request *abreq;
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
217
unsigned int cryptlen = req->cryptlen;
222
ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result,
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ahash_request_set_callback(ahreq,
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aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->update_complete2, req);
230
err = crypto_ahash_update(ahreq);
234
ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
236
ahash_request_set_callback(ahreq, aead_request_flags(req) &
237
CRYPTO_TFM_REQ_MAY_SLEEP,
238
areq_ctx->complete, req);
240
err = crypto_ahash_finup(ahreq);
244
authsize = crypto_aead_authsize(authenc_esn);
245
cryptlen -= authsize;
246
ihash = ahreq->result + authsize;
247
scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
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err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG : 0;
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abreq = aead_request_ctx(req);
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ablkcipher_request_set_tfm(abreq, ctx->enc);
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ablkcipher_request_set_callback(abreq, aead_request_flags(req),
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req->base.complete, req->base.data);
258
ablkcipher_request_set_crypt(abreq, req->src, req->dst,
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err = crypto_ablkcipher_decrypt(abreq);
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authenc_esn_request_complete(req, err);
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static void authenc_esn_verify_ahash_update_done2(struct crypto_async_request *areq,
271
unsigned int authsize;
272
struct ablkcipher_request *abreq;
273
struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
278
unsigned int cryptlen = req->cryptlen;
283
ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
286
CRYPTO_TFM_REQ_MAY_SLEEP,
287
areq_ctx->complete, req);
289
err = crypto_ahash_finup(ahreq);
293
authsize = crypto_aead_authsize(authenc_esn);
294
cryptlen -= authsize;
295
ihash = ahreq->result + authsize;
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scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
299
err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG : 0;
303
abreq = aead_request_ctx(req);
304
ablkcipher_request_set_tfm(abreq, ctx->enc);
305
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
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req->base.complete, req->base.data);
307
ablkcipher_request_set_crypt(abreq, req->src, req->dst,
310
err = crypto_ablkcipher_decrypt(abreq);
313
authenc_esn_request_complete(req, err);
317
static void authenc_esn_verify_ahash_done(struct crypto_async_request *areq,
321
unsigned int authsize;
322
struct ablkcipher_request *abreq;
323
struct aead_request *req = areq->data;
324
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
325
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
326
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
327
struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
328
unsigned int cryptlen = req->cryptlen;
333
authsize = crypto_aead_authsize(authenc_esn);
334
cryptlen -= authsize;
335
ihash = ahreq->result + authsize;
336
scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
339
err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG : 0;
343
abreq = aead_request_ctx(req);
344
ablkcipher_request_set_tfm(abreq, ctx->enc);
345
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
346
req->base.complete, req->base.data);
347
ablkcipher_request_set_crypt(abreq, req->src, req->dst,
350
err = crypto_ablkcipher_decrypt(abreq);
353
authenc_esn_request_complete(req, err);
356
static u8 *crypto_authenc_esn_ahash(struct aead_request *req,
359
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
360
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
361
struct crypto_ahash *auth = ctx->auth;
362
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
363
struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
364
u8 *hash = areq_ctx->tail;
367
hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth),
368
crypto_ahash_alignmask(auth) + 1);
370
ahash_request_set_tfm(ahreq, auth);
372
err = crypto_ahash_init(ahreq);
376
ahash_request_set_crypt(ahreq, areq_ctx->hsg, hash, areq_ctx->headlen);
377
ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
378
areq_ctx->update_complete, req);
380
err = crypto_ahash_update(ahreq);
384
ahash_request_set_crypt(ahreq, areq_ctx->sg, hash, areq_ctx->cryptlen);
385
ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
386
areq_ctx->update_complete2, req);
388
err = crypto_ahash_update(ahreq);
392
ahash_request_set_crypt(ahreq, areq_ctx->tsg, hash,
394
ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
395
areq_ctx->complete, req);
397
err = crypto_ahash_finup(ahreq);
404
static int crypto_authenc_esn_genicv(struct aead_request *req, u8 *iv,
407
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
408
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
409
struct scatterlist *dst = req->dst;
410
struct scatterlist *assoc = req->assoc;
411
struct scatterlist *cipher = areq_ctx->cipher;
412
struct scatterlist *hsg = areq_ctx->hsg;
413
struct scatterlist *tsg = areq_ctx->tsg;
414
struct scatterlist *assoc1;
415
struct scatterlist *assoc2;
416
unsigned int ivsize = crypto_aead_ivsize(authenc_esn);
417
unsigned int cryptlen = req->cryptlen;
423
vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset;
426
sg_init_table(cipher, 2);
427
sg_set_buf(cipher, iv, ivsize);
428
scatterwalk_crypto_chain(cipher, dst, vdst == iv + ivsize, 2);
433
if (sg_is_last(assoc))
437
if (sg_is_last(assoc1))
441
if (!sg_is_last(assoc2))
444
sg_init_table(hsg, 2);
445
sg_set_page(hsg, sg_page(assoc), assoc->length, assoc->offset);
446
sg_set_page(hsg + 1, sg_page(assoc2), assoc2->length, assoc2->offset);
448
sg_init_table(tsg, 1);
449
sg_set_page(tsg, sg_page(assoc1), assoc1->length, assoc1->offset);
451
areq_ctx->cryptlen = cryptlen;
452
areq_ctx->headlen = assoc->length + assoc2->length;
453
areq_ctx->trailen = assoc1->length;
456
areq_ctx->complete = authenc_esn_geniv_ahash_done;
457
areq_ctx->update_complete = authenc_esn_geniv_ahash_update_done;
458
areq_ctx->update_complete2 = authenc_esn_geniv_ahash_update_done2;
460
hash = crypto_authenc_esn_ahash(req, flags);
462
return PTR_ERR(hash);
464
scatterwalk_map_and_copy(hash, dst, cryptlen,
465
crypto_aead_authsize(authenc_esn), 1);
470
static void crypto_authenc_esn_encrypt_done(struct crypto_async_request *req,
473
struct aead_request *areq = req->data;
476
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(areq);
477
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
478
struct ablkcipher_request *abreq = aead_request_ctx(areq);
479
u8 *iv = (u8 *)(abreq + 1) +
480
crypto_ablkcipher_reqsize(ctx->enc);
482
err = crypto_authenc_esn_genicv(areq, iv, 0);
485
authenc_esn_request_complete(areq, err);
488
static int crypto_authenc_esn_encrypt(struct aead_request *req)
490
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
491
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
492
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
493
struct crypto_ablkcipher *enc = ctx->enc;
494
struct scatterlist *dst = req->dst;
495
unsigned int cryptlen = req->cryptlen;
496
struct ablkcipher_request *abreq = (void *)(areq_ctx->tail
498
u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(enc);
501
ablkcipher_request_set_tfm(abreq, enc);
502
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
503
crypto_authenc_esn_encrypt_done, req);
504
ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv);
506
memcpy(iv, req->iv, crypto_aead_ivsize(authenc_esn));
508
err = crypto_ablkcipher_encrypt(abreq);
512
return crypto_authenc_esn_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
515
static void crypto_authenc_esn_givencrypt_done(struct crypto_async_request *req,
518
struct aead_request *areq = req->data;
521
struct skcipher_givcrypt_request *greq = aead_request_ctx(areq);
523
err = crypto_authenc_esn_genicv(areq, greq->giv, 0);
526
authenc_esn_request_complete(areq, err);
529
static int crypto_authenc_esn_givencrypt(struct aead_givcrypt_request *req)
531
struct crypto_aead *authenc_esn = aead_givcrypt_reqtfm(req);
532
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
533
struct aead_request *areq = &req->areq;
534
struct skcipher_givcrypt_request *greq = aead_request_ctx(areq);
538
skcipher_givcrypt_set_tfm(greq, ctx->enc);
539
skcipher_givcrypt_set_callback(greq, aead_request_flags(areq),
540
crypto_authenc_esn_givencrypt_done, areq);
541
skcipher_givcrypt_set_crypt(greq, areq->src, areq->dst, areq->cryptlen,
543
skcipher_givcrypt_set_giv(greq, iv, req->seq);
545
err = crypto_skcipher_givencrypt(greq);
549
return crypto_authenc_esn_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
552
static int crypto_authenc_esn_verify(struct aead_request *req)
554
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
555
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
558
unsigned int authsize;
560
areq_ctx->complete = authenc_esn_verify_ahash_done;
561
areq_ctx->update_complete = authenc_esn_verify_ahash_update_done;
563
ohash = crypto_authenc_esn_ahash(req, CRYPTO_TFM_REQ_MAY_SLEEP);
565
return PTR_ERR(ohash);
567
authsize = crypto_aead_authsize(authenc_esn);
568
ihash = ohash + authsize;
569
scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
571
return memcmp(ihash, ohash, authsize) ? -EBADMSG : 0;
574
static int crypto_authenc_esn_iverify(struct aead_request *req, u8 *iv,
575
unsigned int cryptlen)
577
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
578
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
579
struct scatterlist *src = req->src;
580
struct scatterlist *assoc = req->assoc;
581
struct scatterlist *cipher = areq_ctx->cipher;
582
struct scatterlist *hsg = areq_ctx->hsg;
583
struct scatterlist *tsg = areq_ctx->tsg;
584
struct scatterlist *assoc1;
585
struct scatterlist *assoc2;
586
unsigned int ivsize = crypto_aead_ivsize(authenc_esn);
591
vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset;
594
sg_init_table(cipher, 2);
595
sg_set_buf(cipher, iv, ivsize);
596
scatterwalk_crypto_chain(cipher, src, vsrc == iv + ivsize, 2);
601
if (sg_is_last(assoc))
605
if (sg_is_last(assoc1))
609
if (!sg_is_last(assoc2))
612
sg_init_table(hsg, 2);
613
sg_set_page(hsg, sg_page(assoc), assoc->length, assoc->offset);
614
sg_set_page(hsg + 1, sg_page(assoc2), assoc2->length, assoc2->offset);
616
sg_init_table(tsg, 1);
617
sg_set_page(tsg, sg_page(assoc1), assoc1->length, assoc1->offset);
619
areq_ctx->cryptlen = cryptlen;
620
areq_ctx->headlen = assoc->length + assoc2->length;
621
areq_ctx->trailen = assoc1->length;
624
areq_ctx->complete = authenc_esn_verify_ahash_done;
625
areq_ctx->update_complete = authenc_esn_verify_ahash_update_done;
626
areq_ctx->update_complete2 = authenc_esn_verify_ahash_update_done2;
628
return crypto_authenc_esn_verify(req);
631
static int crypto_authenc_esn_decrypt(struct aead_request *req)
633
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
634
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
635
struct ablkcipher_request *abreq = aead_request_ctx(req);
636
unsigned int cryptlen = req->cryptlen;
637
unsigned int authsize = crypto_aead_authsize(authenc_esn);
641
if (cryptlen < authsize)
643
cryptlen -= authsize;
645
err = crypto_authenc_esn_iverify(req, iv, cryptlen);
649
ablkcipher_request_set_tfm(abreq, ctx->enc);
650
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
651
req->base.complete, req->base.data);
652
ablkcipher_request_set_crypt(abreq, req->src, req->dst, cryptlen, iv);
654
return crypto_ablkcipher_decrypt(abreq);
657
static int crypto_authenc_esn_init_tfm(struct crypto_tfm *tfm)
659
struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
660
struct authenc_esn_instance_ctx *ictx = crypto_instance_ctx(inst);
661
struct crypto_authenc_esn_ctx *ctx = crypto_tfm_ctx(tfm);
662
struct crypto_ahash *auth;
663
struct crypto_ablkcipher *enc;
666
auth = crypto_spawn_ahash(&ictx->auth);
668
return PTR_ERR(auth);
670
enc = crypto_spawn_skcipher(&ictx->enc);
678
ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth) +
679
crypto_ahash_alignmask(auth),
680
crypto_ahash_alignmask(auth) + 1) +
681
crypto_ablkcipher_ivsize(enc);
683
tfm->crt_aead.reqsize = sizeof(struct authenc_esn_request_ctx) +
686
crypto_ahash_reqsize(auth) +
687
sizeof(struct ahash_request),
688
sizeof(struct skcipher_givcrypt_request) +
689
crypto_ablkcipher_reqsize(enc));
694
crypto_free_ahash(auth);
698
static void crypto_authenc_esn_exit_tfm(struct crypto_tfm *tfm)
700
struct crypto_authenc_esn_ctx *ctx = crypto_tfm_ctx(tfm);
702
crypto_free_ahash(ctx->auth);
703
crypto_free_ablkcipher(ctx->enc);
706
static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb)
708
struct crypto_attr_type *algt;
709
struct crypto_instance *inst;
710
struct hash_alg_common *auth;
711
struct crypto_alg *auth_base;
712
struct crypto_alg *enc;
713
struct authenc_esn_instance_ctx *ctx;
714
const char *enc_name;
717
algt = crypto_get_attr_type(tb);
722
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
723
return ERR_PTR(-EINVAL);
725
auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
726
CRYPTO_ALG_TYPE_AHASH_MASK);
728
return ERR_CAST(auth);
730
auth_base = &auth->base;
732
enc_name = crypto_attr_alg_name(tb[2]);
733
err = PTR_ERR(enc_name);
734
if (IS_ERR(enc_name))
737
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
742
ctx = crypto_instance_ctx(inst);
744
err = crypto_init_ahash_spawn(&ctx->auth, auth, inst);
748
crypto_set_skcipher_spawn(&ctx->enc, inst);
749
err = crypto_grab_skcipher(&ctx->enc, enc_name, 0,
750
crypto_requires_sync(algt->type,
755
enc = crypto_skcipher_spawn_alg(&ctx->enc);
758
if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
759
"authencesn(%s,%s)", auth_base->cra_name, enc->cra_name) >=
763
if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
764
"authencesn(%s,%s)", auth_base->cra_driver_name,
765
enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
768
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
769
inst->alg.cra_flags |= enc->cra_flags & CRYPTO_ALG_ASYNC;
770
inst->alg.cra_priority = enc->cra_priority *
771
10 + auth_base->cra_priority;
772
inst->alg.cra_blocksize = enc->cra_blocksize;
773
inst->alg.cra_alignmask = auth_base->cra_alignmask | enc->cra_alignmask;
774
inst->alg.cra_type = &crypto_aead_type;
776
inst->alg.cra_aead.ivsize = enc->cra_ablkcipher.ivsize;
777
inst->alg.cra_aead.maxauthsize = auth->digestsize;
779
inst->alg.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx);
781
inst->alg.cra_init = crypto_authenc_esn_init_tfm;
782
inst->alg.cra_exit = crypto_authenc_esn_exit_tfm;
784
inst->alg.cra_aead.setkey = crypto_authenc_esn_setkey;
785
inst->alg.cra_aead.encrypt = crypto_authenc_esn_encrypt;
786
inst->alg.cra_aead.decrypt = crypto_authenc_esn_decrypt;
787
inst->alg.cra_aead.givencrypt = crypto_authenc_esn_givencrypt;
790
crypto_mod_put(auth_base);
794
crypto_drop_skcipher(&ctx->enc);
796
crypto_drop_ahash(&ctx->auth);
804
static void crypto_authenc_esn_free(struct crypto_instance *inst)
806
struct authenc_esn_instance_ctx *ctx = crypto_instance_ctx(inst);
808
crypto_drop_skcipher(&ctx->enc);
809
crypto_drop_ahash(&ctx->auth);
813
static struct crypto_template crypto_authenc_esn_tmpl = {
814
.name = "authencesn",
815
.alloc = crypto_authenc_esn_alloc,
816
.free = crypto_authenc_esn_free,
817
.module = THIS_MODULE,
820
static int __init crypto_authenc_esn_module_init(void)
822
return crypto_register_template(&crypto_authenc_esn_tmpl);
825
static void __exit crypto_authenc_esn_module_exit(void)
827
crypto_unregister_template(&crypto_authenc_esn_tmpl);
830
module_init(crypto_authenc_esn_module_init);
831
module_exit(crypto_authenc_esn_module_exit);
833
MODULE_LICENSE("GPL");
834
MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
835
MODULE_DESCRIPTION("AEAD wrapper for IPsec with extended sequence numbers");