@@ -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 +407,16 @@ 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;
@@ -721,13 +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));
@@ -737,40 +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);
@@ -779,23 +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,
};
This patch converts authencesn to the new AEAD interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>