diff options
Diffstat (limited to 'crypto/authencesn.c')
| -rw-r--r-- | crypto/authencesn.c | 736 |
1 files changed, 219 insertions, 517 deletions
diff --git a/crypto/authencesn.c b/crypto/authencesn.c index a3da6770bc9e..0c0468869e25 100644 --- a/crypto/authencesn.c +++ b/crypto/authencesn.c @@ -4,6 +4,7 @@ * * Copyright (C) 2010 secunet Security Networks AG * Copyright (C) 2010 Steffen Klassert <steffen.klassert@secunet.com> + * Copyright (c) 2015 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 @@ -16,6 +17,7 @@ #include <crypto/internal/hash.h> #include <crypto/internal/skcipher.h> #include <crypto/authenc.h> +#include <crypto/null.h> #include <crypto/scatterwalk.h> #include <linux/err.h> #include <linux/init.h> @@ -34,19 +36,12 @@ struct crypto_authenc_esn_ctx { unsigned int reqoff; struct crypto_ahash *auth; struct crypto_ablkcipher *enc; + struct crypto_blkcipher *null; }; struct authenc_esn_request_ctx { - unsigned int cryptlen; - unsigned int headlen; - unsigned int trailen; - struct scatterlist *sg; - struct scatterlist hsg[2]; - struct scatterlist tsg[1]; - struct scatterlist cipher[2]; - crypto_completion_t complete; - crypto_completion_t update_complete; - crypto_completion_t update_complete2; + struct scatterlist src[2]; + struct scatterlist dst[2]; char tail[]; }; @@ -56,6 +51,15 @@ static void authenc_esn_request_complete(struct aead_request *req, int err) aead_request_complete(req, err); } +static int crypto_authenc_esn_setauthsize(struct crypto_aead *authenc_esn, + unsigned int authsize) +{ + if (authsize > 0 && authsize < 4) + return -EINVAL; + + return 0; +} + static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *key, unsigned int keylen) { @@ -93,556 +97,242 @@ badkey: goto out; } -static void authenc_esn_geniv_ahash_update_done(struct crypto_async_request *areq, - int err) -{ - struct aead_request *req = areq->data; - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct authenc_esn_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->update_complete2, req); - - err = crypto_ahash_update(ahreq); - if (err) - goto out; - - ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result, - areq_ctx->trailen); - 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_esn), 1); - -out: - authenc_esn_request_complete(req, err); -} - -static void authenc_esn_geniv_ahash_update_done2(struct crypto_async_request *areq, - int err) +static int crypto_authenc_esn_genicv_tail(struct aead_request *req, + unsigned int flags) { - struct aead_request *req = areq->data; struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); struct authenc_esn_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->tsg, ahreq->result, - areq_ctx->trailen); - 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; + struct crypto_ahash *auth = ctx->auth; + u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail, + crypto_ahash_alignmask(auth) + 1); + unsigned int authsize = crypto_aead_authsize(authenc_esn); + unsigned int assoclen = req->assoclen; + unsigned int cryptlen = req->cryptlen; + struct scatterlist *dst = req->dst; + u32 tmp[2]; - scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg, - areq_ctx->cryptlen, - crypto_aead_authsize(authenc_esn), 1); + /* Move high-order bits of sequence number back. */ + scatterwalk_map_and_copy(tmp, dst, 4, 4, 0); + scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0); + scatterwalk_map_and_copy(tmp, dst, 0, 8, 1); -out: - authenc_esn_request_complete(req, err); + scatterwalk_map_and_copy(hash, dst, assoclen + cryptlen, authsize, 1); + return 0; } - static void authenc_esn_geniv_ahash_done(struct crypto_async_request *areq, int err) { struct aead_request *req = areq->data; - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct authenc_esn_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_esn), 1); - -out: + err = err ?: crypto_authenc_esn_genicv_tail(req, 0); aead_request_complete(req, err); } - -static void authenc_esn_verify_ahash_update_done(struct crypto_async_request *areq, - int err) +static int crypto_authenc_esn_genicv(struct aead_request *req, + unsigned int flags) { - u8 *ihash; - unsigned int authsize; - struct ablkcipher_request *abreq; - struct aead_request *req = areq->data; struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); - struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); - unsigned int cryptlen = req->cryptlen; - - 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->update_complete2, req); - - err = crypto_ahash_update(ahreq); - if (err) - goto out; - - ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result, - areq_ctx->trailen); - 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_esn); - cryptlen -= authsize; - ihash = ahreq->result + authsize; - scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, - authsize, 0); - - err = crypto_memneq(ihash, ahreq->result, authsize) ? -EBADMSG : 0; - 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, - cryptlen, req->iv); - - err = crypto_ablkcipher_decrypt(abreq); - -out: - authenc_esn_request_complete(req, err); -} - -static void authenc_esn_verify_ahash_update_done2(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_esn = crypto_aead_reqtfm(req); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); + struct crypto_ahash *auth = ctx->auth; + u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail, + crypto_ahash_alignmask(auth) + 1); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); + unsigned int authsize = crypto_aead_authsize(authenc_esn); + unsigned int assoclen = req->assoclen; unsigned int cryptlen = req->cryptlen; + struct scatterlist *dst = req->dst; + u32 tmp[2]; - if (err) - goto out; - - ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result, - areq_ctx->trailen); - 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_esn); - cryptlen -= authsize; - ihash = ahreq->result + authsize; - scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, - authsize, 0); + if (!authsize) + return 0; - err = crypto_memneq(ihash, ahreq->result, authsize) ? -EBADMSG : 0; - if (err) - goto out; + /* Move high-order bits of sequence number to the end. */ + scatterwalk_map_and_copy(tmp, dst, 0, 8, 0); + scatterwalk_map_and_copy(tmp, dst, 4, 4, 1); + scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 1); - 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, - cryptlen, req->iv); + sg_init_table(areq_ctx->dst, 2); + dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4); - err = crypto_ablkcipher_decrypt(abreq); + ahash_request_set_tfm(ahreq, auth); + ahash_request_set_crypt(ahreq, dst, hash, assoclen + cryptlen); + ahash_request_set_callback(ahreq, flags, + authenc_esn_geniv_ahash_done, req); -out: - authenc_esn_request_complete(req, err); + return crypto_ahash_digest(ahreq) ?: + crypto_authenc_esn_genicv_tail(req, aead_request_flags(req)); } -static void authenc_esn_verify_ahash_done(struct crypto_async_request *areq, - int err) +static void crypto_authenc_esn_encrypt_done(struct crypto_async_request *req, + int err) { - u8 *ihash; - unsigned int authsize; - struct ablkcipher_request *abreq; - struct aead_request *req = areq->data; - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); - struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); - unsigned int cryptlen = req->cryptlen; - - if (err) - goto out; - - authsize = crypto_aead_authsize(authenc_esn); - cryptlen -= authsize; - ihash = ahreq->result + authsize; - scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, - authsize, 0); - - err = crypto_memneq(ihash, ahreq->result, authsize) ? -EBADMSG : 0; - 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, - cryptlen, req->iv); + struct aead_request *areq = req->data; - err = crypto_ablkcipher_decrypt(abreq); + if (!err) + err = crypto_authenc_esn_genicv(areq, 0); -out: - authenc_esn_request_complete(req, err); + authenc_esn_request_complete(areq, err); } -static u8 *crypto_authenc_esn_ahash(struct aead_request *req, - unsigned int flags) +static int crypto_authenc_esn_copy(struct aead_request *req, unsigned int len) { struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct crypto_ahash *auth = ctx->auth; - struct authenc_esn_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; - - hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), - crypto_ahash_alignmask(auth) + 1); - - ahash_request_set_tfm(ahreq, auth); + struct blkcipher_desc desc = { + .tfm = ctx->null, + }; - err = crypto_ahash_init(ahreq); - if (err) - return ERR_PTR(err); - - ahash_request_set_crypt(ahreq, areq_ctx->hsg, hash, areq_ctx->headlen); - ahash_request_set_callback(ahreq, aead_request_flags(req) & flags, - areq_ctx->update_complete, req); - - err = crypto_ahash_update(ahreq); - if (err) - 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->update_complete2, req); - - err = crypto_ahash_update(ahreq); - if (err) - return ERR_PTR(err); - - ahash_request_set_crypt(ahreq, areq_ctx->tsg, hash, - areq_ctx->trailen); - ahash_request_set_callback(ahreq, aead_request_flags(req) & flags, - areq_ctx->complete, req); - - err = crypto_ahash_finup(ahreq); - if (err) - return ERR_PTR(err); - - return hash; + return crypto_blkcipher_encrypt(&desc, req->dst, req->src, len); } -static int crypto_authenc_esn_genicv(struct aead_request *req, u8 *iv, - unsigned int flags) +static int crypto_authenc_esn_encrypt(struct aead_request *req) { struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); - struct scatterlist *dst = req->dst; - struct scatterlist *assoc = req->assoc; - struct scatterlist *cipher = areq_ctx->cipher; - struct scatterlist *hsg = areq_ctx->hsg; - struct scatterlist *tsg = areq_ctx->tsg; - struct scatterlist *assoc1; - struct scatterlist *assoc2; - unsigned int ivsize = crypto_aead_ivsize(authenc_esn); + struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); + struct ablkcipher_request *abreq = (void *)(areq_ctx->tail + + ctx->reqoff); + struct crypto_ablkcipher *enc = ctx->enc; + unsigned int assoclen = req->assoclen; unsigned int cryptlen = req->cryptlen; - struct page *dstp; - u8 *vdst; - u8 *hash; - - dstp = sg_page(dst); - vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset; - - if (ivsize) { - sg_init_table(cipher, 2); - sg_set_buf(cipher, iv, ivsize); - scatterwalk_crypto_chain(cipher, dst, vdst == iv + ivsize, 2); - dst = cipher; - cryptlen += ivsize; - } - - if (sg_is_last(assoc)) - return -EINVAL; - - assoc1 = assoc + 1; - if (sg_is_last(assoc1)) - return -EINVAL; - - assoc2 = assoc + 2; - if (!sg_is_last(assoc2)) - return -EINVAL; - - sg_init_table(hsg, 2); - sg_set_page(hsg, sg_page(assoc), assoc->length, assoc->offset); - sg_set_page(hsg + 1, sg_page(assoc2), assoc2->length, assoc2->offset); - - sg_init_table(tsg, 1); - sg_set_page(tsg, sg_page(assoc1), assoc1->length, assoc1->offset); - - areq_ctx->cryptlen = cryptlen; - areq_ctx->headlen = assoc->length + assoc2->length; - areq_ctx->trailen = assoc1->length; - areq_ctx->sg = dst; - - areq_ctx->complete = authenc_esn_geniv_ahash_done; - areq_ctx->update_complete = authenc_esn_geniv_ahash_update_done; - areq_ctx->update_complete2 = authenc_esn_geniv_ahash_update_done2; + struct scatterlist *src, *dst; + int err; - hash = crypto_authenc_esn_ahash(req, flags); - if (IS_ERR(hash)) - return PTR_ERR(hash); + sg_init_table(areq_ctx->src, 2); + src = scatterwalk_ffwd(areq_ctx->src, req->src, assoclen); + dst = src; - scatterwalk_map_and_copy(hash, dst, cryptlen, - crypto_aead_authsize(authenc_esn), 1); - return 0; -} + if (req->src != req->dst) { + err = crypto_authenc_esn_copy(req, assoclen); + if (err) + return err; - -static void crypto_authenc_esn_encrypt_done(struct crypto_async_request *req, - int err) -{ - struct aead_request *areq = req->data; - - if (!err) { - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(areq); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct ablkcipher_request *abreq = aead_request_ctx(areq); - u8 *iv = (u8 *)(abreq + 1) + - crypto_ablkcipher_reqsize(ctx->enc); - - err = crypto_authenc_esn_genicv(areq, iv, 0); + sg_init_table(areq_ctx->dst, 2); + dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, assoclen); } - authenc_esn_request_complete(areq, err); -} - -static int crypto_authenc_esn_encrypt(struct aead_request *req) -{ - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); - struct crypto_ablkcipher *enc = ctx->enc; - struct scatterlist *dst = req->dst; - unsigned int cryptlen = req->cryptlen; - struct ablkcipher_request *abreq = (void *)(areq_ctx->tail - + ctx->reqoff); - u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(enc); - int err; - ablkcipher_request_set_tfm(abreq, enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), crypto_authenc_esn_encrypt_done, req); - ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv); - - memcpy(iv, req->iv, crypto_aead_ivsize(authenc_esn)); + ablkcipher_request_set_crypt(abreq, src, dst, cryptlen, req->iv); err = crypto_ablkcipher_encrypt(abreq); if (err) return err; - return crypto_authenc_esn_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP); + return crypto_authenc_esn_genicv(req, aead_request_flags(req)); } -static void crypto_authenc_esn_givencrypt_done(struct crypto_async_request *req, - int err) +static int crypto_authenc_esn_decrypt_tail(struct aead_request *req, + unsigned int flags) { - struct aead_request *areq = req->data; - - if (!err) { - struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); - - err = crypto_authenc_esn_genicv(areq, greq->giv, 0); - } + struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); + unsigned int authsize = crypto_aead_authsize(authenc_esn); + struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); + struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); + struct ablkcipher_request *abreq = (void *)(areq_ctx->tail + + ctx->reqoff); + struct crypto_ahash *auth = ctx->auth; + u8 *ohash = PTR_ALIGN((u8 *)areq_ctx->tail, + crypto_ahash_alignmask(auth) + 1); + unsigned int cryptlen = req->cryptlen - authsize; + unsigned int assoclen = req->assoclen; + struct scatterlist *dst = req->dst; + u8 *ihash = ohash + crypto_ahash_digestsize(auth); + u32 tmp[2]; - authenc_esn_request_complete(areq, err); -} + /* Move high-order bits of sequence number back. */ + scatterwalk_map_and_copy(tmp, dst, 4, 4, 0); + scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0); + scatterwalk_map_and_copy(tmp, dst, 0, 8, 1); -static int crypto_authenc_esn_givencrypt(struct aead_givcrypt_request *req) -{ - struct crypto_aead *authenc_esn = aead_givcrypt_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct aead_request *areq = &req->areq; - struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); - u8 *iv = req->giv; - int err; + if (crypto_memneq(ihash, ohash, authsize)) + return -EBADMSG; - skcipher_givcrypt_set_tfm(greq, ctx->enc); - skcipher_givcrypt_set_callback(greq, aead_request_flags(areq), - crypto_authenc_esn_givencrypt_done, areq); - skcipher_givcrypt_set_crypt(greq, areq->src, areq->dst, areq->cryptlen, - areq->iv); - skcipher_givcrypt_set_giv(greq, iv, req->seq); + sg_init_table(areq_ctx->dst, 2); + dst = scatterwalk_ffwd(areq_ctx->dst, dst, assoclen); - err = crypto_skcipher_givencrypt(greq); - if (err) - return err; + ablkcipher_request_set_tfm(abreq, ctx->enc); + ablkcipher_request_set_callback(abreq, flags, + req->base.complete, req->base.data); + ablkcipher_request_set_crypt(abreq, dst, dst, cryptlen, req->iv); - return crypto_authenc_esn_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP); + return crypto_ablkcipher_decrypt(abreq); } -static int crypto_authenc_esn_verify(struct aead_request *req) +static void authenc_esn_verify_ahash_done(struct crypto_async_request *areq, + int err) { - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); - u8 *ohash; - u8 *ihash; - unsigned int authsize; - - areq_ctx->complete = authenc_esn_verify_ahash_done; - areq_ctx->update_complete = authenc_esn_verify_ahash_update_done; - - ohash = crypto_authenc_esn_ahash(req, CRYPTO_TFM_REQ_MAY_SLEEP); - if (IS_ERR(ohash)) - return PTR_ERR(ohash); + struct aead_request *req = areq->data; - authsize = crypto_aead_authsize(authenc_esn); - ihash = ohash + authsize; - scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, - authsize, 0); - return crypto_memneq(ihash, ohash, authsize) ? -EBADMSG : 0; + err = err ?: crypto_authenc_esn_decrypt_tail(req, 0); + aead_request_complete(req, err); } -static int crypto_authenc_esn_iverify(struct aead_request *req, u8 *iv, - unsigned int cryptlen) +static int crypto_authenc_esn_decrypt(struct aead_request *req) { struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); - struct scatterlist *src = req->src; - struct scatterlist *assoc = req->assoc; - struct scatterlist *cipher = areq_ctx->cipher; - struct scatterlist *hsg = areq_ctx->hsg; - struct scatterlist *tsg = areq_ctx->tsg; - struct scatterlist *assoc1; - struct scatterlist *assoc2; - unsigned int ivsize = crypto_aead_ivsize(authenc_esn); - struct page *srcp; - u8 *vsrc; - - srcp = sg_page(src); - vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset; - - if (ivsize) { - sg_init_table(cipher, 2); - sg_set_buf(cipher, iv, ivsize); - scatterwalk_crypto_chain(cipher, src, vsrc == iv + ivsize, 2); - src = cipher; - cryptlen += ivsize; - } - - if (sg_is_last(assoc)) - return -EINVAL; - - assoc1 = assoc + 1; - if (sg_is_last(assoc1)) - return -EINVAL; + struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); + struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); + unsigned int authsize = crypto_aead_authsize(authenc_esn); + struct crypto_ahash *auth = ctx->auth; + u8 *ohash = PTR_ALIGN((u8 *)areq_ctx->tail, + crypto_ahash_alignmask(auth) + 1); + unsigned int assoclen = req->assoclen; + unsigned int cryptlen = req->cryptlen; + u8 *ihash = ohash + crypto_ahash_digestsize(auth); + struct scatterlist *dst = req->dst; + u32 tmp[2]; + int err; - assoc2 = assoc + 2; - if (!sg_is_last(assoc2)) - return -EINVAL; + cryptlen -= authsize; - sg_init_table(hsg, 2); - sg_set_page(hsg, sg_page(assoc), assoc->length, assoc->offset); - sg_set_page(hsg + 1, sg_page(assoc2), assoc2->length, assoc2->offset); + if (req->src != dst) { + err = crypto_authenc_esn_copy(req, assoclen + cryptlen); + if (err) + return err; + } - sg_init_table(tsg, 1); - sg_set_page(tsg, sg_page(assoc1), assoc1->length, assoc1->offset); + scatterwalk_map_and_copy(ihash, req->src, assoclen + cryptlen, + authsize, 0); - areq_ctx->cryptlen = cryptlen; - areq_ctx->headlen = assoc->length + assoc2->length; - areq_ctx->trailen = assoc1->length; - areq_ctx->sg = src; + if (!authsize) + goto tail; - areq_ctx->complete = authenc_esn_verify_ahash_done; - areq_ctx->update_complete = authenc_esn_verify_ahash_update_done; - areq_ctx->update_complete2 = authenc_esn_verify_ahash_update_done2; + /* Move high-order bits of sequence number to the end. */ + scatterwalk_map_and_copy(tmp, dst, 0, 8, 0); + scatterwalk_map_and_copy(tmp, dst, 4, 4, 1); + scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 1); - return crypto_authenc_esn_verify(req); -} + sg_init_table(areq_ctx->dst, 2); + dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4); -static int crypto_authenc_esn_decrypt(struct aead_request *req) -{ - struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); - struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); - struct ablkcipher_request *abreq = aead_request_ctx(req); - unsigned int cryptlen = req->cryptlen; - unsigned int authsize = crypto_aead_authsize(authenc_esn); - u8 *iv = req->iv; - int err; - - if (cryptlen < authsize) - return -EINVAL; - cryptlen -= authsize; + ahash_request_set_tfm(ahreq, auth); + ahash_request_set_crypt(ahreq, dst, ohash, assoclen + cryptlen); + ahash_request_set_callback(ahreq, aead_request_flags(req), + authenc_esn_verify_ahash_done, req); - err = crypto_authenc_esn_iverify(req, iv, cryptlen); + err = crypto_ahash_digest(ahreq); if (err) return err; - 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, cryptlen, iv); - - return crypto_ablkcipher_decrypt(abreq); +tail: + return crypto_authenc_esn_decrypt_tail(req, aead_request_flags(req)); } -static int crypto_authenc_esn_init_tfm(struct crypto_tfm *tfm) +static int crypto_authenc_esn_init_tfm(struct crypto_aead *tfm) { - struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); - struct authenc_esn_instance_ctx *ictx = crypto_instance_ctx(inst); - struct crypto_authenc_esn_ctx *ctx = crypto_tfm_ctx(tfm); + struct aead_instance *inst = aead_alg_instance(tfm); + struct authenc_esn_instance_ctx *ictx = aead_instance_ctx(inst); + struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm); struct crypto_ahash *auth; struct crypto_ablkcipher *enc; + struct crypto_blkcipher *null; int err; auth = crypto_spawn_ahash(&ictx->auth); @@ -654,15 +344,20 @@ static int crypto_authenc_esn_init_tfm(struct crypto_tfm *tfm) if (IS_ERR(enc)) goto err_free_ahash; + null = crypto_get_default_null_skcipher(); + err = PTR_ERR(null); + if (IS_ERR(null)) + goto err_free_skcipher; + ctx->auth = auth; ctx->enc = enc; + ctx->null = null; - ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth) + - crypto_ahash_alignmask(auth), - crypto_ahash_alignmask(auth) + 1) + - crypto_ablkcipher_ivsize(enc); + ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth), + crypto_ahash_alignmask(auth) + 1); - crypto_aead_set_reqsize(__crypto_aead_cast(tfm), + crypto_aead_set_reqsize( + tfm, sizeof(struct authenc_esn_request_ctx) + ctx->reqoff + max_t(unsigned int, @@ -673,23 +368,36 @@ static int crypto_authenc_esn_init_tfm(struct crypto_tfm *tfm) return 0; +err_free_skcipher: + crypto_free_ablkcipher(enc); err_free_ahash: crypto_free_ahash(auth); return err; } -static void crypto_authenc_esn_exit_tfm(struct crypto_tfm *tfm) +static void crypto_authenc_esn_exit_tfm(struct crypto_aead *tfm) { - struct crypto_authenc_esn_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm); crypto_free_ahash(ctx->auth); crypto_free_ablkcipher(ctx->enc); + crypto_put_default_null_skcipher(); } -static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb) +static void crypto_authenc_esn_free(struct aead_instance *inst) +{ + struct authenc_esn_instance_ctx *ctx = aead_instance_ctx(inst); + + crypto_drop_skcipher(&ctx->enc); + crypto_drop_ahash(&ctx->auth); + kfree(inst); +} + +static int crypto_authenc_esn_create(struct crypto_template *tmpl, + struct rtattr **tb) { struct crypto_attr_type *algt; - struct crypto_instance *inst; + struct aead_instance *inst; struct hash_alg_common *auth; struct crypto_alg *auth_base; struct crypto_alg *enc; @@ -699,15 +407,15 @@ static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb) algt = crypto_get_attr_type(tb); if (IS_ERR(algt)) - return ERR_CAST(algt); + return PTR_ERR(algt); if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) - return ERR_PTR(-EINVAL); + return -EINVAL; auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH, CRYPTO_ALG_TYPE_AHASH_MASK); if (IS_ERR(auth)) - return ERR_CAST(auth); + return PTR_ERR(auth); auth_base = &auth->base; @@ -721,13 +429,14 @@ static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb) if (!inst) goto out_put_auth; - ctx = crypto_instance_ctx(inst); + ctx = aead_instance_ctx(inst); - err = crypto_init_ahash_spawn(&ctx->auth, auth, inst); + err = crypto_init_ahash_spawn(&ctx->auth, auth, + aead_crypto_instance(inst)); if (err) goto err_free_inst; - crypto_set_skcipher_spawn(&ctx->enc, inst); + crypto_set_skcipher_spawn(&ctx->enc, aead_crypto_instance(inst)); err = crypto_grab_skcipher(&ctx->enc, enc_name, 0, crypto_requires_sync(algt->type, algt->mask)); @@ -737,40 +446,44 @@ static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb) enc = crypto_skcipher_spawn_alg(&ctx->enc); err = -ENAMETOOLONG; - if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, - "authencesn(%s,%s)", auth_base->cra_name, enc->cra_name) >= - CRYPTO_MAX_ALG_NAME) + if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, + "authencesn(%s,%s)", auth_base->cra_name, + enc->cra_name) >= CRYPTO_MAX_ALG_NAME) goto err_drop_enc; - if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME, + if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "authencesn(%s,%s)", auth_base->cra_driver_name, 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; - inst->alg.cra_priority = enc->cra_priority * - 10 + auth_base->cra_priority; - inst->alg.cra_blocksize = enc->cra_blocksize; - inst->alg.cra_alignmask = auth_base->cra_alignmask | enc->cra_alignmask; - inst->alg.cra_type = &crypto_aead_type; + inst->alg.base.cra_flags = enc->cra_flags & CRYPTO_ALG_ASYNC; + inst->alg.base.cra_priority = enc->cra_priority * 10 + + auth_base->cra_priority; + inst->alg.base.cra_blocksize = enc->cra_blocksize; + inst->alg.base.cra_alignmask = auth_base->cra_alignmask | + enc->cra_alignmask; + inst->alg.base.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx); + + inst->alg.ivsize = enc->cra_ablkcipher.ivsize; + inst->alg.maxauthsize = auth->digestsize; - inst->alg.cra_aead.ivsize = enc->cra_ablkcipher.ivsize; - inst->alg.cra_aead.maxauthsize = auth->digestsize; + inst->alg.init = crypto_authenc_esn_init_tfm; + inst->alg.exit = crypto_authenc_esn_exit_tfm; - inst->alg.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx); + inst->alg.setkey = crypto_authenc_esn_setkey; + inst->alg.setauthsize = crypto_authenc_esn_setauthsize; + inst->alg.encrypt = crypto_authenc_esn_encrypt; + inst->alg.decrypt = crypto_authenc_esn_decrypt; - inst->alg.cra_init = crypto_authenc_esn_init_tfm; - inst->alg.cra_exit = crypto_authenc_esn_exit_tfm; + inst->free = crypto_authenc_esn_free, - inst->alg.cra_aead.setkey = crypto_authenc_esn_setkey; - inst->alg.cra_aead.encrypt = crypto_authenc_esn_encrypt; - inst->alg.cra_aead.decrypt = crypto_authenc_esn_decrypt; - inst->alg.cra_aead.givencrypt = crypto_authenc_esn_givencrypt; + err = aead_register_instance(tmpl, inst); + if (err) + goto err_drop_enc; out: crypto_mod_put(auth_base); - return inst; + return err; err_drop_enc: crypto_drop_skcipher(&ctx->enc); @@ -779,23 +492,12 @@ err_drop_auth: err_free_inst: kfree(inst); out_put_auth: - inst = ERR_PTR(err); goto out; } -static void crypto_authenc_esn_free(struct crypto_instance *inst) -{ - struct authenc_esn_instance_ctx *ctx = crypto_instance_ctx(inst); - - crypto_drop_skcipher(&ctx->enc); - crypto_drop_ahash(&ctx->auth); - kfree(inst); -} - static struct crypto_template crypto_authenc_esn_tmpl = { .name = "authencesn", - .alloc = crypto_authenc_esn_alloc, - .free = crypto_authenc_esn_free, + .create = crypto_authenc_esn_create, .module = THIS_MODULE, }; |