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crypto: authencesn - Convert to new AEAD interface

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This patch converts authencesn to the new AEAD interface.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2015-08-07 16:42:59 +08:00
parent 0e91657e33
commit 104880a6b4
1 changed files with 229 additions and 505 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

748
crypto/authencesn.c
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@ -4,6 +4,7 @@
* *
* Copyright (C) 2010 secunet Security Networks AG * Copyright (C) 2010 secunet Security Networks AG
* Copyright (C) 2010 Steffen Klassert <steffen.klassert@secunet.com> * 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 * 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 * 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/hash.h>
#include <crypto/internal/skcipher.h> #include <crypto/internal/skcipher.h>
#include <crypto/authenc.h> #include <crypto/authenc.h>
#include <crypto/null.h>
#include <crypto/scatterwalk.h> #include <crypto/scatterwalk.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/init.h> #include <linux/init.h>
@ -34,19 +36,12 @@ struct crypto_authenc_esn_ctx {
unsigned int reqoff; unsigned int reqoff;
struct crypto_ahash *auth; struct crypto_ahash *auth;
struct crypto_ablkcipher *enc; struct crypto_ablkcipher *enc;
struct crypto_blkcipher *null;
}; };
struct authenc_esn_request_ctx { struct authenc_esn_request_ctx {
unsigned int cryptlen; struct scatterlist src[2];
unsigned int headlen; struct scatterlist dst[2];
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;
char tail[]; char tail[];
}; };
@ -56,6 +51,15 @@ static void authenc_esn_request_complete(struct aead_request *req, int err)
aead_request_complete(req, 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, static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *key,
unsigned int keylen) unsigned int keylen)
{ {
@ -93,349 +97,73 @@ static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *
goto out; goto out;
} }
static void authenc_esn_geniv_ahash_update_done(struct crypto_async_request *areq, static int crypto_authenc_esn_genicv_tail(struct aead_request *req,
int err) unsigned int flags)
{ {
struct aead_request *req = areq->data;
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff); 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];
if (err) /* Move high-order bits of sequence number back. */
goto out; 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);
ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result, scatterwalk_map_and_copy(hash, dst, assoclen + cryptlen, authsize, 1);
areq_ctx->cryptlen); return 0;
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;
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_done(struct crypto_async_request *areq, static void authenc_esn_geniv_ahash_done(struct crypto_async_request *areq,
int err) int err)
{ {
struct aead_request *req = areq->data; 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) err = err ?: crypto_authenc_esn_genicv_tail(req, 0);
goto out;
scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
areq_ctx->cryptlen,
crypto_aead_authsize(authenc_esn), 1);
out:
aead_request_complete(req, err); aead_request_complete(req, err);
} }
static int crypto_authenc_esn_genicv(struct aead_request *req,
static void authenc_esn_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_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 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->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_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_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);
err = crypto_ablkcipher_decrypt(abreq);
out:
authenc_esn_request_complete(req, err);
}
static u8 *crypto_authenc_esn_ahash(struct aead_request *req,
unsigned int flags) unsigned int flags)
{ {
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
struct crypto_ahash *auth = ctx->auth; struct crypto_ahash *auth = ctx->auth;
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req); u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail,
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); 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 (!authsize)
return 0;
/* 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);
sg_init_table(areq_ctx->dst, 2);
dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4);
ahash_request_set_tfm(ahreq, auth); 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);
err = crypto_ahash_init(ahreq); return crypto_ahash_digest(ahreq) ?:
if (err) crypto_authenc_esn_genicv_tail(req, aead_request_flags(req));
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;
}
static int crypto_authenc_esn_genicv(struct aead_request *req, u8 *iv,
unsigned int flags)
{
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);
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);
scatterwalk_map_and_copy(hash, dst, cryptlen,
crypto_aead_authsize(authenc_esn), 1);
return 0;
} }
@ -444,185 +172,167 @@ static void crypto_authenc_esn_encrypt_done(struct crypto_async_request *req,
{ {
struct aead_request *areq = req->data; struct aead_request *areq = req->data;
if (!err) { if (!err)
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(areq); err = crypto_authenc_esn_genicv(areq, 0);
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);
}
authenc_esn_request_complete(areq, err); authenc_esn_request_complete(areq, err);
} }
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 blkcipher_desc desc = {
.tfm = ctx->null,
};
return crypto_blkcipher_encrypt(&desc, req->dst, req->src, len);
}
static int crypto_authenc_esn_encrypt(struct aead_request *req) static int crypto_authenc_esn_encrypt(struct aead_request *req)
{ {
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(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 authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
struct crypto_ablkcipher *enc = ctx->enc; struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
struct scatterlist *dst = req->dst;
unsigned int cryptlen = req->cryptlen;
struct ablkcipher_request *abreq = (void *)(areq_ctx->tail struct ablkcipher_request *abreq = (void *)(areq_ctx->tail
+ ctx->reqoff); + ctx->reqoff);
u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(enc); struct crypto_ablkcipher *enc = ctx->enc;
unsigned int assoclen = req->assoclen;
unsigned int cryptlen = req->cryptlen;
struct scatterlist *src, *dst;
int err; int err;
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;
sg_init_table(areq_ctx->dst, 2);
dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, assoclen);
}
ablkcipher_request_set_tfm(abreq, enc); ablkcipher_request_set_tfm(abreq, enc);
ablkcipher_request_set_callback(abreq, aead_request_flags(req), ablkcipher_request_set_callback(abreq, aead_request_flags(req),
crypto_authenc_esn_encrypt_done, req); crypto_authenc_esn_encrypt_done, req);
ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv); ablkcipher_request_set_crypt(abreq, src, dst, cryptlen, req->iv);
memcpy(iv, req->iv, crypto_aead_ivsize(authenc_esn));
err = crypto_ablkcipher_encrypt(abreq); err = crypto_ablkcipher_encrypt(abreq);
if (err) if (err)
return 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, static int crypto_authenc_esn_decrypt_tail(struct aead_request *req,
unsigned int flags)
{
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];
/* 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);
if (crypto_memneq(ihash, ohash, authsize))
return -EBADMSG;
sg_init_table(areq_ctx->dst, 2);
dst = scatterwalk_ffwd(areq_ctx->dst, dst, assoclen);
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_ablkcipher_decrypt(abreq);
}
static void authenc_esn_verify_ahash_done(struct crypto_async_request *areq,
int err) int err)
{ {
struct aead_request *areq = req->data; struct aead_request *req = areq->data;
if (!err) { err = err ?: crypto_authenc_esn_decrypt_tail(req, 0);
struct skcipher_givcrypt_request *greq = aead_request_ctx(areq); aead_request_complete(req, err);
err = crypto_authenc_esn_genicv(areq, greq->giv, 0);
}
authenc_esn_request_complete(areq, err);
}
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;
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);
err = crypto_skcipher_givencrypt(greq);
if (err)
return err;
return crypto_authenc_esn_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
}
static int crypto_authenc_esn_verify(struct aead_request *req)
{
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);
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;
}
static int crypto_authenc_esn_iverify(struct aead_request *req, u8 *iv,
unsigned int cryptlen)
{
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;
}
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 = src;
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;
return crypto_authenc_esn_verify(req);
} }
static int crypto_authenc_esn_decrypt(struct aead_request *req) static int crypto_authenc_esn_decrypt(struct aead_request *req)
{ {
struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req); struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
struct ablkcipher_request *abreq = aead_request_ctx(req); struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
unsigned int cryptlen = req->cryptlen;
unsigned int authsize = crypto_aead_authsize(authenc_esn); unsigned int authsize = crypto_aead_authsize(authenc_esn);
u8 *iv = req->iv; 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; int err;
if (cryptlen < authsize)
return -EINVAL;
cryptlen -= authsize; cryptlen -= authsize;
err = crypto_authenc_esn_iverify(req, iv, cryptlen); if (req->src != dst) {
err = crypto_authenc_esn_copy(req, assoclen + cryptlen);
if (err)
return err;
}
scatterwalk_map_and_copy(ihash, req->src, assoclen + cryptlen,
authsize, 0);
if (!authsize)
goto tail;
/* 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);
sg_init_table(areq_ctx->dst, 2);
dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4);
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_ahash_digest(ahreq);
if (err) if (err)
return err; return err;
ablkcipher_request_set_tfm(abreq, ctx->enc); tail:
ablkcipher_request_set_callback(abreq, aead_request_flags(req), return crypto_authenc_esn_decrypt_tail(req, 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);
} }
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 aead_instance *inst = aead_alg_instance(tfm);
struct authenc_esn_instance_ctx *ictx = crypto_instance_ctx(inst); struct authenc_esn_instance_ctx *ictx = aead_instance_ctx(inst);
struct crypto_authenc_esn_ctx *ctx = crypto_tfm_ctx(tfm); struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(tfm);
struct crypto_ahash *auth; struct crypto_ahash *auth;
struct crypto_ablkcipher *enc; struct crypto_ablkcipher *enc;
struct crypto_blkcipher *null;
int err; int err;
auth = crypto_spawn_ahash(&ictx->auth); 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)) if (IS_ERR(enc))
goto err_free_ahash; 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->auth = auth;
ctx->enc = enc; ctx->enc = enc;
ctx->null = null;
ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth) + ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth),
crypto_ahash_alignmask(auth), crypto_ahash_alignmask(auth) + 1);
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_esn_request_ctx) + sizeof(struct authenc_esn_request_ctx) +
ctx->reqoff + ctx->reqoff +
max_t(unsigned int, max_t(unsigned int,
@ -653,23 +368,36 @@ static int crypto_authenc_esn_init_tfm(struct crypto_tfm *tfm)
return 0; return 0;
err_free_skcipher:
crypto_free_ablkcipher(enc);
err_free_ahash: err_free_ahash:
crypto_free_ahash(auth); crypto_free_ahash(auth);
return err; 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_ahash(ctx->auth);
crypto_free_ablkcipher(ctx->enc); 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_attr_type *algt;
struct crypto_instance *inst; struct aead_instance *inst;
struct hash_alg_common *auth; struct hash_alg_common *auth;
struct crypto_alg *auth_base; struct crypto_alg *auth_base;
struct crypto_alg *enc; 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); algt = crypto_get_attr_type(tb);
if (IS_ERR(algt)) if (IS_ERR(algt))
return ERR_CAST(algt); return PTR_ERR(algt);
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_AEAD_NEW)) &
return ERR_PTR(-EINVAL); algt->mask)
return -EINVAL;
auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH, auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
CRYPTO_ALG_TYPE_AHASH_MASK); CRYPTO_ALG_TYPE_AHASH_MASK);
if (IS_ERR(auth)) if (IS_ERR(auth))
return ERR_CAST(auth); return PTR_ERR(auth);
auth_base = &auth->base; auth_base = &auth->base;
@ -701,13 +430,14 @@ static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb)
if (!inst) if (!inst)
goto out_put_auth; 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) if (err)
goto err_free_inst; 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, err = crypto_grab_skcipher(&ctx->enc, enc_name, 0,
crypto_requires_sync(algt->type, crypto_requires_sync(algt->type,
algt->mask)); algt->mask));
@ -717,40 +447,45 @@ static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb)
enc = crypto_skcipher_spawn_alg(&ctx->enc); enc = crypto_skcipher_spawn_alg(&ctx->enc);
err = -ENAMETOOLONG; err = -ENAMETOOLONG;
if (snprintf(inst->alg.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) >= "authencesn(%s,%s)", auth_base->cra_name,
CRYPTO_MAX_ALG_NAME) enc->cra_name) >= CRYPTO_MAX_ALG_NAME)
goto err_drop_enc; 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, "authencesn(%s,%s)", auth_base->cra_driver_name,
enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME) enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
goto err_drop_enc; goto err_drop_enc;
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD; inst->alg.base.cra_flags = enc->cra_flags & CRYPTO_ALG_ASYNC;
inst->alg.cra_flags |= enc->cra_flags & CRYPTO_ALG_ASYNC; inst->alg.base.cra_flags |= CRYPTO_ALG_AEAD_NEW;
inst->alg.cra_priority = enc->cra_priority * inst->alg.base.cra_priority = enc->cra_priority * 10 +
10 + auth_base->cra_priority; auth_base->cra_priority;
inst->alg.cra_blocksize = enc->cra_blocksize; inst->alg.base.cra_blocksize = enc->cra_blocksize;
inst->alg.cra_alignmask = auth_base->cra_alignmask | enc->cra_alignmask; inst->alg.base.cra_alignmask = auth_base->cra_alignmask |
inst->alg.cra_type = &crypto_aead_type; enc->cra_alignmask;
inst->alg.base.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx);
inst->alg.cra_aead.ivsize = enc->cra_ablkcipher.ivsize; inst->alg.ivsize = enc->cra_ablkcipher.ivsize;
inst->alg.cra_aead.maxauthsize = auth->digestsize; inst->alg.maxauthsize = auth->digestsize;
inst->alg.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx); inst->alg.init = crypto_authenc_esn_init_tfm;
inst->alg.exit = crypto_authenc_esn_exit_tfm;
inst->alg.cra_init = crypto_authenc_esn_init_tfm; inst->alg.setkey = crypto_authenc_esn_setkey;
inst->alg.cra_exit = crypto_authenc_esn_exit_tfm; inst->alg.setauthsize = crypto_authenc_esn_setauthsize;
inst->alg.encrypt = crypto_authenc_esn_encrypt;
inst->alg.decrypt = crypto_authenc_esn_decrypt;
inst->alg.cra_aead.setkey = crypto_authenc_esn_setkey; inst->free = crypto_authenc_esn_free,
inst->alg.cra_aead.encrypt = crypto_authenc_esn_encrypt;
inst->alg.cra_aead.decrypt = crypto_authenc_esn_decrypt; err = aead_register_instance(tmpl, inst);
inst->alg.cra_aead.givencrypt = crypto_authenc_esn_givencrypt; if (err)
goto err_drop_enc;
out: out:
crypto_mod_put(auth_base); crypto_mod_put(auth_base);
return inst; return err;
err_drop_enc: err_drop_enc:
crypto_drop_skcipher(&ctx->enc); crypto_drop_skcipher(&ctx->enc);
@ -759,23 +494,12 @@ static struct crypto_instance *crypto_authenc_esn_alloc(struct rtattr **tb)
err_free_inst: err_free_inst:
kfree(inst); kfree(inst);
out_put_auth: out_put_auth:
inst = ERR_PTR(err);
goto out; 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 = { static struct crypto_template crypto_authenc_esn_tmpl = {
.name = "authencesn", .name = "authencesn",
.alloc = crypto_authenc_esn_alloc, .create = crypto_authenc_esn_create,
.free = crypto_authenc_esn_free,
.module = THIS_MODULE, .module = THIS_MODULE,
}; };