crypto: authencesn - Convert to new AEAD interface
authorHerbert Xu <herbert@gondor.apana.org.au>
Fri, 7 Aug 2015 08:42:59 +0000 (16:42 +0800)
committerHerbert Xu <herbert@gondor.apana.org.au>
Mon, 10 Aug 2015 15:20:13 +0000 (23:20 +0800)
This patch converts authencesn to the new AEAD interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
crypto/authencesn.c

index b8efe36ce1142d0c6b0b8e45ec23965ec7135c40..c30393e2ad225062a936df3545cf5effe41b8413 100644 (file)
@@ -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)
 {
@@ -93,536 +97,242 @@ badkey:
        goto out;
 }
 
-static void authenc_esn_geniv_ahash_update_done(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->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)
-{
-       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;
+       if (!authsize)
+               return 0;
 
-       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);
+       /* 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);
 
-       err = crypto_ahash_finup(ahreq);
-       if (err)
-               goto out;
+       sg_init_table(areq_ctx->dst, 2);
+       dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4);
 
-       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);
+       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;
+       struct blkcipher_desc desc = {
+               .tfm = ctx->null,
+       };
 
-       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, 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;
-       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 (assoc->length < 12)
-               return -EINVAL;
-
-       sg_init_table(hsg, 2);
-       sg_set_page(hsg, sg_page(assoc), 4, assoc->offset);
-       sg_set_page(hsg + 1, sg_page(assoc), 4, assoc->offset + 8);
-
-       sg_init_table(tsg, 1);
-       sg_set_page(tsg, sg_page(assoc), 4, assoc->offset + 4);
-
-       areq_ctx->cryptlen = cryptlen;
-       areq_ctx->headlen = 8;
-       areq_ctx->trailen = 4;
-       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;
-
-       hash = crypto_authenc_esn_ahash(req, flags);
-       if (IS_ERR(hash))
-               return PTR_ERR(hash);
+       struct scatterlist *src, *dst;
+       int err;
 
-       scatterwalk_map_and_copy(hash, dst, cryptlen,
-                                crypto_aead_authsize(authenc_esn), 1);
-       return 0;
-}
+       sg_init_table(areq_ctx->src, 2);
+       src = scatterwalk_ffwd(areq_ctx->src, req->src, assoclen);
+       dst = src;
 
+       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;
-       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;
-       }
+       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;
 
-       if (assoc->length < 12)
-               return -EINVAL;
+       cryptlen -= authsize;
 
-       sg_init_table(hsg, 2);
-       sg_set_page(hsg, sg_page(assoc), 4, assoc->offset);
-       sg_set_page(hsg + 1, sg_page(assoc), 4, assoc->offset + 8);
+       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(assoc), 4, assoc->offset + 4);
+       scatterwalk_map_and_copy(ihash, req->src, assoclen + cryptlen,
+                                authsize, 0);
 
-       areq_ctx->cryptlen = cryptlen;
-       areq_ctx->headlen = 8;
-       areq_ctx->trailen = 4;
-       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);
@@ -634,15 +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,
@@ -653,23 +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 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 struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb)
+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;
@@ -679,15 +407,16 @@ 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);
+       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;
 
@@ -701,13 +430,14 @@ 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));
@@ -717,40 +447,45 @@ 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_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_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);
@@ -759,23 +494,12 @@ 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,
 };