From 92d95ba91772279b6ef9c6e09661f67abcf27259 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 30 Jul 2015 17:53:16 +0800 Subject: [PATCH] crypto: authenc - Convert to new AEAD interface This patch converts authenc to the new AEAD interface. Signed-off-by: Herbert Xu --- crypto/authenc.c | 584 +++++++++++++++++-------------------------------------- 1 file changed, 183 insertions(+), 401 deletions(-) diff --git a/crypto/authenc.c b/crypto/authenc.c index 3e85229..bca3835 100644 --- a/crypto/authenc.c +++ b/crypto/authenc.c @@ -1,7 +1,7 @@ /* * Authenc: Simple AEAD wrapper for IPsec * - * Copyright (c) 2007 Herbert Xu + * Copyright (c) 2007-2015 Herbert Xu * * 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 @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -23,26 +24,21 @@ #include #include -typedef u8 *(*authenc_ahash_t)(struct aead_request *req, unsigned int flags); - struct authenc_instance_ctx { struct crypto_ahash_spawn auth; struct crypto_skcipher_spawn enc; + unsigned int reqoff; }; struct crypto_authenc_ctx { - unsigned int reqoff; struct crypto_ahash *auth; struct crypto_ablkcipher *enc; + struct crypto_blkcipher *null; }; 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; + struct scatterlist src[2]; + struct scatterlist dst[2]; char tail[]; }; @@ -119,189 +115,35 @@ badkey: goto out; } -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: - authenc_request_complete(req, err); -} - 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 aead_instance *inst = aead_alg_instance(authenc); + struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); - struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); + struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); if (err) goto out; - scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg, - areq_ctx->cryptlen, + scatterwalk_map_and_copy(ahreq->result, req->dst, + req->assoclen + req->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) -{ - 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); - 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->complete, req); - - err = crypto_ahash_finup(ahreq); - if (err) - goto out; - - authsize = crypto_aead_authsize(authenc); - 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_request_complete(req, err); -} - -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); - unsigned int cryptlen = req->cryptlen; - - if (err) - goto out; - - authsize = crypto_aead_authsize(authenc); - 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_request_complete(req, err); -} - -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; - int err; - - hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), - crypto_ahash_alignmask(auth) + 1); - - ahash_request_set_tfm(ahreq, auth); - - err = crypto_ahash_init(ahreq); - if (err) - 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); - - 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->complete, req); - - err = crypto_ahash_finup(ahreq); - if (err) - return ERR_PTR(err); - - return hash; -} - -static u8 *crypto_authenc_ahash(struct aead_request *req, unsigned int flags) +static int crypto_authenc_genicv(struct aead_request *req, unsigned int flags) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct aead_instance *inst = aead_alg_instance(authenc); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); + struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); 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); + struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); u8 *hash = areq_ctx->tail; int err; @@ -309,66 +151,18 @@ static u8 *crypto_authenc_ahash(struct aead_request *req, unsigned int flags) 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); + ahash_request_set_crypt(ahreq, req->dst, hash, + req->assoclen + req->cryptlen); + ahash_request_set_callback(ahreq, flags, + authenc_geniv_ahash_done, req); err = crypto_ahash_digest(ahreq); if (err) - return ERR_PTR(err); - - return hash; -} - -static int crypto_authenc_genicv(struct aead_request *req, u8 *iv, - unsigned int flags) -{ - struct crypto_aead *authenc = crypto_aead_reqtfm(req); - struct authenc_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 *asg = areq_ctx->asg; - unsigned int ivsize = crypto_aead_ivsize(authenc); - unsigned int cryptlen = req->cryptlen; - authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb; - 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 (req->assoclen && sg_is_last(assoc)) { - authenc_ahash_fn = crypto_authenc_ahash; - sg_init_table(asg, 2); - sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset); - scatterwalk_crypto_chain(asg, dst, 0, 2); - 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); - if (IS_ERR(hash)) - return PTR_ERR(hash); + return err; - scatterwalk_map_and_copy(hash, dst, cryptlen, + scatterwalk_map_and_copy(hash, req->dst, req->assoclen + req->cryptlen, crypto_aead_authsize(authenc), 1); + return 0; } @@ -377,180 +171,155 @@ static void crypto_authenc_encrypt_done(struct crypto_async_request *req, { struct aead_request *areq = req->data; - if (!err) { - struct crypto_aead *authenc = crypto_aead_reqtfm(areq); - struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); - struct authenc_request_ctx *areq_ctx = aead_request_ctx(areq); - struct ablkcipher_request *abreq = (void *)(areq_ctx->tail - + ctx->reqoff); - u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(ctx->enc); + if (err) + goto out; - err = crypto_authenc_genicv(areq, iv, 0); - } + err = crypto_authenc_genicv(areq, 0); +out: authenc_request_complete(areq, err); } +static int crypto_authenc_copy_assoc(struct aead_request *req) +{ + struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); + struct blkcipher_desc desc = { + .tfm = ctx->null, + }; + + return crypto_blkcipher_encrypt(&desc, req->dst, req->src, + req->assoclen); +} + static int crypto_authenc_encrypt(struct aead_request *req) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct aead_instance *inst = aead_alg_instance(authenc); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); + struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); struct authenc_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); + struct ablkcipher_request *abreq = (void *)(areq_ctx->tail + + ictx->reqoff); + struct scatterlist *src, *dst; int err; + sg_init_table(areq_ctx->src, 2); + src = scatterwalk_ffwd(areq_ctx->src, req->src, req->assoclen); + dst = src; + + if (req->src != req->dst) { + err = crypto_authenc_copy_assoc(req); + if (err) + return err; + + sg_init_table(areq_ctx->dst, 2); + dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, req->assoclen); + } + ablkcipher_request_set_tfm(abreq, enc); ablkcipher_request_set_callback(abreq, aead_request_flags(req), crypto_authenc_encrypt_done, req); - ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv); - - memcpy(iv, req->iv, crypto_aead_ivsize(authenc)); + ablkcipher_request_set_crypt(abreq, src, dst, cryptlen, req->iv); err = crypto_ablkcipher_encrypt(abreq); if (err) return err; - return crypto_authenc_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP); + return crypto_authenc_genicv(req, aead_request_flags(req)); } -static void crypto_authenc_givencrypt_done(struct crypto_async_request *req, - int err) +static int crypto_authenc_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_genicv(areq, greq->giv, 0); - } + struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct aead_instance *inst = aead_alg_instance(authenc); + struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); + struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); + struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); + struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); + struct ablkcipher_request *abreq = (void *)(areq_ctx->tail + + ictx->reqoff); + unsigned int authsize = crypto_aead_authsize(authenc); + u8 *ihash = ahreq->result + authsize; + struct scatterlist *src, *dst; - authenc_request_complete(areq, err); -} + scatterwalk_map_and_copy(ihash, req->src, ahreq->nbytes, authsize, 0); -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; + if (crypto_memneq(ihash, ahreq->result, authsize)) + return -EBADMSG; - 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); + sg_init_table(areq_ctx->src, 2); + src = scatterwalk_ffwd(areq_ctx->src, req->src, req->assoclen); + dst = src; - err = crypto_skcipher_givencrypt(greq); - if (err) - return err; + if (req->src != req->dst) { + sg_init_table(areq_ctx->dst, 2); + dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, req->assoclen); + } - return crypto_authenc_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP); -} + 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, src, dst, + req->cryptlen - authsize, req->iv); -static int crypto_authenc_verify(struct aead_request *req, - authenc_ahash_t authenc_ahash_fn) -{ - struct crypto_aead *authenc = crypto_aead_reqtfm(req); - struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); - u8 *ohash; - u8 *ihash; - unsigned int authsize; - - areq_ctx->complete = authenc_verify_ahash_done; - areq_ctx->update_complete = authenc_verify_ahash_update_done; - - ohash = authenc_ahash_fn(req, CRYPTO_TFM_REQ_MAY_SLEEP); - if (IS_ERR(ohash)) - return PTR_ERR(ohash); - - authsize = crypto_aead_authsize(authenc); - ihash = ohash + authsize; - scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen, - authsize, 0); - return crypto_memneq(ihash, ohash, authsize) ? -EBADMSG : 0; + return crypto_ablkcipher_decrypt(abreq); } -static int crypto_authenc_iverify(struct aead_request *req, u8 *iv, - unsigned int cryptlen) +static void authenc_verify_ahash_done(struct crypto_async_request *areq, + int err) { - struct crypto_aead *authenc = crypto_aead_reqtfm(req); - struct authenc_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 *asg = areq_ctx->asg; - unsigned int ivsize = crypto_aead_ivsize(authenc); - authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb; - 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; - } + struct aead_request *req = areq->data; - if (req->assoclen && sg_is_last(assoc)) { - authenc_ahash_fn = crypto_authenc_ahash; - sg_init_table(asg, 2); - sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset); - scatterwalk_crypto_chain(asg, src, 0, 2); - src = asg; - cryptlen += req->assoclen; - } + if (err) + goto out; - areq_ctx->cryptlen = cryptlen; - areq_ctx->sg = src; + err = crypto_authenc_decrypt_tail(req, 0); - return crypto_authenc_verify(req, authenc_ahash_fn); +out: + authenc_request_complete(req, err); } 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); - unsigned int cryptlen = req->cryptlen; unsigned int authsize = crypto_aead_authsize(authenc); - u8 *iv = req->iv; + struct aead_instance *inst = aead_alg_instance(authenc); + struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); + struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); + struct crypto_ahash *auth = ctx->auth; + struct authenc_request_ctx *areq_ctx = aead_request_ctx(req); + struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff); + u8 *hash = areq_ctx->tail; int err; - if (cryptlen < authsize) - return -EINVAL; - cryptlen -= authsize; + hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth), + crypto_ahash_alignmask(auth) + 1); - err = crypto_authenc_iverify(req, iv, cryptlen); + ahash_request_set_tfm(ahreq, auth); + ahash_request_set_crypt(ahreq, req->src, hash, + req->assoclen + req->cryptlen - authsize); + ahash_request_set_callback(ahreq, aead_request_flags(req), + authenc_verify_ahash_done, req); + + 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); + return crypto_authenc_decrypt_tail(req, aead_request_flags(req)); } -static int crypto_authenc_init_tfm(struct crypto_tfm *tfm) +static int crypto_authenc_init_tfm(struct crypto_aead *tfm) { - struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); - struct authenc_instance_ctx *ictx = crypto_instance_ctx(inst); - struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm); + struct aead_instance *inst = aead_alg_instance(tfm); + struct authenc_instance_ctx *ictx = aead_instance_ctx(inst); + struct crypto_authenc_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); @@ -562,42 +331,57 @@ static int crypto_authenc_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); - - crypto_aead_set_reqsize(__crypto_aead_cast(tfm), + crypto_aead_set_reqsize( + tfm, sizeof(struct authenc_request_ctx) + - ctx->reqoff + + ictx->reqoff + max_t(unsigned int, - crypto_ahash_reqsize(auth) + - sizeof(struct ahash_request), - sizeof(struct skcipher_givcrypt_request) + - crypto_ablkcipher_reqsize(enc))); + crypto_ahash_reqsize(auth) + + sizeof(struct ahash_request), + sizeof(struct ablkcipher_request) + + crypto_ablkcipher_reqsize(enc))); return 0; +err_free_skcipher: + crypto_free_ablkcipher(enc); err_free_ahash: crypto_free_ahash(auth); return err; } -static void crypto_authenc_exit_tfm(struct crypto_tfm *tfm) +static void crypto_authenc_exit_tfm(struct crypto_aead *tfm) { - struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_authenc_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_alloc(struct rtattr **tb) +static void crypto_authenc_free(struct aead_instance *inst) +{ + struct authenc_instance_ctx *ctx = aead_instance_ctx(inst); + + crypto_drop_skcipher(&ctx->enc); + crypto_drop_ahash(&ctx->auth); + kfree(inst); +} + +static int crypto_authenc_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; @@ -607,15 +391,16 @@ static struct crypto_instance *crypto_authenc_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); + if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_AEAD_NEW)) & + algt->mask) + 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; @@ -629,13 +414,14 @@ static struct crypto_instance *crypto_authenc_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)); @@ -644,41 +430,48 @@ static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb) enc = crypto_skcipher_spawn_alg(&ctx->enc); + ctx->reqoff = ALIGN(2 * auth->digestsize + auth_base->cra_alignmask, + auth_base->cra_alignmask + 1); + err = -ENAMETOOLONG; - if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, + if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, "authenc(%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, "authenc(%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_flags |= CRYPTO_ALG_AEAD_NEW; + 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_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_init_tfm; + inst->alg.exit = crypto_authenc_exit_tfm; - inst->alg.cra_ctxsize = sizeof(struct crypto_authenc_ctx); + inst->alg.setkey = crypto_authenc_setkey; + inst->alg.encrypt = crypto_authenc_encrypt; + inst->alg.decrypt = crypto_authenc_decrypt; - inst->alg.cra_init = crypto_authenc_init_tfm; - inst->alg.cra_exit = crypto_authenc_exit_tfm; + inst->free = crypto_authenc_free; - inst->alg.cra_aead.setkey = crypto_authenc_setkey; - inst->alg.cra_aead.encrypt = crypto_authenc_encrypt; - inst->alg.cra_aead.decrypt = crypto_authenc_decrypt; - inst->alg.cra_aead.givencrypt = crypto_authenc_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); @@ -687,23 +480,12 @@ err_drop_auth: err_free_inst: kfree(inst); out_put_auth: - inst = ERR_PTR(err); goto out; } -static void crypto_authenc_free(struct crypto_instance *inst) -{ - struct authenc_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_tmpl = { .name = "authenc", - .alloc = crypto_authenc_alloc, - .free = crypto_authenc_free, + .create = crypto_authenc_create, .module = THIS_MODULE, }; -- 2.7.4