diff options
| -rw-r--r-- | crypto/authenc.c | 66 |
1 files changed, 28 insertions, 38 deletions
diff --git a/crypto/authenc.c b/crypto/authenc.c index aa442dea5c43..394e73308e31 100644 --- a/crypto/authenc.c +++ b/crypto/authenc.c @@ -87,17 +87,18 @@ badkey: goto out; } -static int crypto_authenc_hash(struct aead_request *req) +static u8 *crypto_authenc_hash(struct aead_request *req, unsigned int flags, + struct scatterlist *cipher, + unsigned int cryptlen) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); struct crypto_hash *auth = ctx->auth; struct hash_desc desc = { .tfm = auth, + .flags = aead_request_flags(req) & flags, }; u8 *hash = aead_request_ctx(req); - struct scatterlist *dst = req->dst; - unsigned int cryptlen = req->cryptlen; int err; hash = (u8 *)ALIGN((unsigned long)hash + crypto_hash_alignmask(auth), @@ -112,7 +113,7 @@ static int crypto_authenc_hash(struct aead_request *req) if (err) goto auth_unlock; - err = crypto_hash_update(&desc, dst, cryptlen); + err = crypto_hash_update(&desc, cipher, cryptlen); if (err) goto auth_unlock; @@ -121,7 +122,21 @@ auth_unlock: spin_unlock_bh(&ctx->auth_lock); if (err) - return err; + return ERR_PTR(err); + + return hash; +} + +static int crypto_authenc_genicv(struct aead_request *req, unsigned int flags) +{ + struct crypto_aead *authenc = crypto_aead_reqtfm(req); + struct scatterlist *dst = req->dst; + unsigned int cryptlen = req->cryptlen; + u8 *hash; + + hash = crypto_authenc_hash(req, flags, dst, cryptlen); + if (IS_ERR(hash)) + return PTR_ERR(hash); scatterwalk_map_and_copy(hash, dst, cryptlen, crypto_aead_authsize(authenc), 1); @@ -132,7 +147,7 @@ static void crypto_authenc_encrypt_done(struct crypto_async_request *req, int err) { if (!err) - err = crypto_authenc_hash(req->data); + err = crypto_authenc_genicv(req->data, 0); aead_request_complete(req->data, err); } @@ -154,50 +169,25 @@ static int crypto_authenc_encrypt(struct aead_request *req) if (err) return err; - return crypto_authenc_hash(req); + return crypto_authenc_genicv(req, CRYPTO_TFM_REQ_MAY_SLEEP); } static int crypto_authenc_verify(struct aead_request *req, unsigned int cryptlen) { struct crypto_aead *authenc = crypto_aead_reqtfm(req); - struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc); - struct crypto_hash *auth = ctx->auth; - struct hash_desc desc = { - .tfm = auth, - .flags = aead_request_flags(req), - }; - u8 *ohash = aead_request_ctx(req); + u8 *ohash; u8 *ihash; struct scatterlist *src = req->src; unsigned int authsize; - int err; - ohash = (u8 *)ALIGN((unsigned long)ohash + crypto_hash_alignmask(auth), - crypto_hash_alignmask(auth) + 1); - ihash = ohash + crypto_hash_digestsize(auth); - - spin_lock_bh(&ctx->auth_lock); - err = crypto_hash_init(&desc); - if (err) - goto auth_unlock; - - err = crypto_hash_update(&desc, req->assoc, req->assoclen); - if (err) - goto auth_unlock; - - err = crypto_hash_update(&desc, src, cryptlen); - if (err) - goto auth_unlock; - - err = crypto_hash_final(&desc, ohash); -auth_unlock: - spin_unlock_bh(&ctx->auth_lock); - - if (err) - return err; + ohash = crypto_authenc_hash(req, CRYPTO_TFM_REQ_MAY_SLEEP, src, + cryptlen); + if (IS_ERR(ohash)) + return PTR_ERR(ohash); authsize = crypto_aead_authsize(authenc); + ihash = ohash + authsize; scatterwalk_map_and_copy(ihash, src, cryptlen, authsize, 0); return memcmp(ihash, ohash, authsize) ? -EBADMSG: 0; } |