crypto: authencesn - Convert to new AEAD interface
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
Родитель
0e91657e33
Коммит
104880a6b4
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@ -4,6 +4,7 @@
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*
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* Copyright (C) 2010 secunet Security Networks AG
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* Copyright (C) 2010 Steffen Klassert <steffen.klassert@secunet.com>
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* Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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@ -16,6 +17,7 @@
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#include <crypto/internal/hash.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/authenc.h>
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#include <crypto/null.h>
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#include <crypto/scatterwalk.h>
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#include <linux/err.h>
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#include <linux/init.h>
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@ -34,19 +36,12 @@ struct crypto_authenc_esn_ctx {
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unsigned int reqoff;
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struct crypto_ahash *auth;
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struct crypto_ablkcipher *enc;
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struct crypto_blkcipher *null;
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};
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struct authenc_esn_request_ctx {
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unsigned int cryptlen;
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unsigned int headlen;
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unsigned int trailen;
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struct scatterlist *sg;
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struct scatterlist hsg[2];
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struct scatterlist tsg[1];
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struct scatterlist cipher[2];
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crypto_completion_t complete;
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crypto_completion_t update_complete;
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crypto_completion_t update_complete2;
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struct scatterlist src[2];
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struct scatterlist dst[2];
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char tail[];
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};
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@ -56,6 +51,15 @@ static void authenc_esn_request_complete(struct aead_request *req, int err)
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aead_request_complete(req, err);
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}
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static int crypto_authenc_esn_setauthsize(struct crypto_aead *authenc_esn,
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unsigned int authsize)
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{
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if (authsize > 0 && authsize < 4)
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return -EINVAL;
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return 0;
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}
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static int crypto_authenc_esn_setkey(struct crypto_aead *authenc_esn, const u8 *key,
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unsigned int keylen)
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{
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@ -93,349 +97,73 @@ badkey:
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goto out;
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}
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static void authenc_esn_geniv_ahash_update_done(struct crypto_async_request *areq,
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int err)
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static int crypto_authenc_esn_genicv_tail(struct aead_request *req,
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unsigned int flags)
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{
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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struct crypto_ahash *auth = ctx->auth;
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u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail,
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crypto_ahash_alignmask(auth) + 1);
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unsigned int authsize = crypto_aead_authsize(authenc_esn);
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unsigned int assoclen = req->assoclen;
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unsigned int cryptlen = req->cryptlen;
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struct scatterlist *dst = req->dst;
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u32 tmp[2];
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if (err)
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goto out;
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/* Move high-order bits of sequence number back. */
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scatterwalk_map_and_copy(tmp, dst, 4, 4, 0);
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scatterwalk_map_and_copy(tmp + 1, dst, assoclen + cryptlen, 4, 0);
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scatterwalk_map_and_copy(tmp, dst, 0, 8, 1);
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ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result,
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areq_ctx->cryptlen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->update_complete2, req);
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err = crypto_ahash_update(ahreq);
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if (err)
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goto out;
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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areq_ctx->trailen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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if (err)
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goto out;
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scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
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areq_ctx->cryptlen,
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crypto_aead_authsize(authenc_esn), 1);
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out:
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authenc_esn_request_complete(req, err);
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scatterwalk_map_and_copy(hash, dst, assoclen + cryptlen, authsize, 1);
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return 0;
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}
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static void authenc_esn_geniv_ahash_update_done2(struct crypto_async_request *areq,
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int err)
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{
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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if (err)
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goto out;
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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areq_ctx->trailen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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if (err)
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goto out;
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scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
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areq_ctx->cryptlen,
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crypto_aead_authsize(authenc_esn), 1);
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out:
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authenc_esn_request_complete(req, err);
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}
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static void authenc_esn_geniv_ahash_done(struct crypto_async_request *areq,
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int err)
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{
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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if (err)
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goto out;
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scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
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areq_ctx->cryptlen,
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crypto_aead_authsize(authenc_esn), 1);
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out:
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err = err ?: crypto_authenc_esn_genicv_tail(req, 0);
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aead_request_complete(req, err);
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}
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static void authenc_esn_verify_ahash_update_done(struct crypto_async_request *areq,
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int err)
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{
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u8 *ihash;
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unsigned int authsize;
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struct ablkcipher_request *abreq;
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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unsigned int cryptlen = req->cryptlen;
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if (err)
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goto out;
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ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result,
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areq_ctx->cryptlen);
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ahash_request_set_callback(ahreq,
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aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->update_complete2, req);
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err = crypto_ahash_update(ahreq);
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if (err)
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goto out;
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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areq_ctx->trailen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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if (err)
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goto out;
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authsize = crypto_aead_authsize(authenc_esn);
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cryptlen -= authsize;
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ihash = ahreq->result + authsize;
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scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
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authsize, 0);
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err = crypto_memneq(ihash, ahreq->result, authsize) ? -EBADMSG : 0;
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if (err)
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goto out;
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abreq = aead_request_ctx(req);
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ablkcipher_request_set_tfm(abreq, ctx->enc);
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ablkcipher_request_set_callback(abreq, aead_request_flags(req),
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req->base.complete, req->base.data);
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ablkcipher_request_set_crypt(abreq, req->src, req->dst,
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cryptlen, req->iv);
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err = crypto_ablkcipher_decrypt(abreq);
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out:
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authenc_esn_request_complete(req, err);
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}
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static void authenc_esn_verify_ahash_update_done2(struct crypto_async_request *areq,
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int err)
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{
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u8 *ihash;
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unsigned int authsize;
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struct ablkcipher_request *abreq;
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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unsigned int cryptlen = req->cryptlen;
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if (err)
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goto out;
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, ahreq->result,
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areq_ctx->trailen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) &
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CRYPTO_TFM_REQ_MAY_SLEEP,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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if (err)
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goto out;
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authsize = crypto_aead_authsize(authenc_esn);
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cryptlen -= authsize;
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ihash = ahreq->result + authsize;
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scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
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authsize, 0);
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err = crypto_memneq(ihash, ahreq->result, authsize) ? -EBADMSG : 0;
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if (err)
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goto out;
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abreq = aead_request_ctx(req);
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ablkcipher_request_set_tfm(abreq, ctx->enc);
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ablkcipher_request_set_callback(abreq, aead_request_flags(req),
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req->base.complete, req->base.data);
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ablkcipher_request_set_crypt(abreq, req->src, req->dst,
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cryptlen, req->iv);
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err = crypto_ablkcipher_decrypt(abreq);
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out:
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authenc_esn_request_complete(req, err);
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}
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static void authenc_esn_verify_ahash_done(struct crypto_async_request *areq,
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int err)
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{
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u8 *ihash;
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unsigned int authsize;
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struct ablkcipher_request *abreq;
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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unsigned int cryptlen = req->cryptlen;
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if (err)
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goto out;
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authsize = crypto_aead_authsize(authenc_esn);
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cryptlen -= authsize;
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ihash = ahreq->result + authsize;
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scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
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authsize, 0);
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err = crypto_memneq(ihash, ahreq->result, authsize) ? -EBADMSG : 0;
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if (err)
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goto out;
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abreq = aead_request_ctx(req);
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ablkcipher_request_set_tfm(abreq, ctx->enc);
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ablkcipher_request_set_callback(abreq, aead_request_flags(req),
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req->base.complete, req->base.data);
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ablkcipher_request_set_crypt(abreq, req->src, req->dst,
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cryptlen, req->iv);
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err = crypto_ablkcipher_decrypt(abreq);
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out:
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authenc_esn_request_complete(req, err);
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}
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static u8 *crypto_authenc_esn_ahash(struct aead_request *req,
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unsigned int flags)
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{
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct crypto_ahash *auth = ctx->auth;
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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u8 *hash = areq_ctx->tail;
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int err;
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hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth),
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crypto_ahash_alignmask(auth) + 1);
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ahash_request_set_tfm(ahreq, auth);
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err = crypto_ahash_init(ahreq);
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if (err)
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return ERR_PTR(err);
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ahash_request_set_crypt(ahreq, areq_ctx->hsg, hash, areq_ctx->headlen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
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areq_ctx->update_complete, req);
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err = crypto_ahash_update(ahreq);
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if (err)
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return ERR_PTR(err);
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ahash_request_set_crypt(ahreq, areq_ctx->sg, hash, areq_ctx->cryptlen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
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areq_ctx->update_complete2, req);
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err = crypto_ahash_update(ahreq);
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if (err)
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return ERR_PTR(err);
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ahash_request_set_crypt(ahreq, areq_ctx->tsg, hash,
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areq_ctx->trailen);
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ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
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areq_ctx->complete, req);
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err = crypto_ahash_finup(ahreq);
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if (err)
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return ERR_PTR(err);
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return hash;
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}
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static int crypto_authenc_esn_genicv(struct aead_request *req, u8 *iv,
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static int crypto_authenc_esn_genicv(struct aead_request *req,
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unsigned int flags)
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{
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struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
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struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
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struct scatterlist *dst = req->dst;
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struct scatterlist *assoc = req->assoc;
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struct scatterlist *cipher = areq_ctx->cipher;
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struct scatterlist *hsg = areq_ctx->hsg;
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struct scatterlist *tsg = areq_ctx->tsg;
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unsigned int ivsize = crypto_aead_ivsize(authenc_esn);
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struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
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struct crypto_ahash *auth = ctx->auth;
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u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail,
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crypto_ahash_alignmask(auth) + 1);
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struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
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unsigned int authsize = crypto_aead_authsize(authenc_esn);
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unsigned int assoclen = req->assoclen;
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unsigned int cryptlen = req->cryptlen;
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struct page *dstp;
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u8 *vdst;
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u8 *hash;
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struct scatterlist *dst = req->dst;
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u32 tmp[2];
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dstp = sg_page(dst);
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vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset;
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if (!authsize)
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return 0;
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|
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if (ivsize) {
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sg_init_table(cipher, 2);
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sg_set_buf(cipher, iv, ivsize);
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scatterwalk_crypto_chain(cipher, dst, vdst == iv + ivsize, 2);
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dst = cipher;
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cryptlen += ivsize;
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}
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/* Move high-order bits of sequence number to the end. */
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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);
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||||
|
||||
if (assoc->length < 12)
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return -EINVAL;
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||||
sg_init_table(areq_ctx->dst, 2);
|
||||
dst = scatterwalk_ffwd(areq_ctx->dst, dst, 4);
|
||||
|
||||
sg_init_table(hsg, 2);
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||||
sg_set_page(hsg, sg_page(assoc), 4, assoc->offset);
|
||||
sg_set_page(hsg + 1, sg_page(assoc), 4, assoc->offset + 8);
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||||
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);
|
||||
|
||||
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;
|
||||
return crypto_ahash_digest(ahreq) ?:
|
||||
crypto_authenc_esn_genicv_tail(req, aead_request_flags(req));
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -444,185 +172,167 @@ static void crypto_authenc_esn_encrypt_done(struct crypto_async_request *req,
|
|||
{
|
||||
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);
|
||||
}
|
||||
if (!err)
|
||||
err = crypto_authenc_esn_genicv(areq, 0);
|
||||
|
||||
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)
|
||||
{
|
||||
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 crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
|
||||
struct ablkcipher_request *abreq = (void *)(areq_ctx->tail
|
||||
+ 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;
|
||||
|
||||
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_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);
|
||||
}
|
||||
|
||||
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_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 aead_request *areq = &req->areq;
|
||||
struct skcipher_givcrypt_request *greq = aead_request_ctx(areq);
|
||||
u8 *iv = req->giv;
|
||||
int err;
|
||||
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];
|
||||
|
||||
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);
|
||||
/* 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);
|
||||
|
||||
err = crypto_skcipher_givencrypt(greq);
|
||||
if (err)
|
||||
return err;
|
||||
if (crypto_memneq(ihash, ohash, authsize))
|
||||
return -EBADMSG;
|
||||
|
||||
return crypto_authenc_esn_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
|
||||
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 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;
|
||||
struct aead_request *req = areq->data;
|
||||
|
||||
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);
|
||||
err = err ?: crypto_authenc_esn_decrypt_tail(req, 0);
|
||||
aead_request_complete(req, err);
|
||||
}
|
||||
|
||||
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 crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
|
||||
struct ablkcipher_request *abreq = aead_request_ctx(req);
|
||||
unsigned int cryptlen = req->cryptlen;
|
||||
struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
|
||||
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;
|
||||
|
||||
if (cryptlen < authsize)
|
||||
return -EINVAL;
|
||||
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)
|
||||
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 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;
|
||||
|
|
@ -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.cra_aead.ivsize = enc->cra_ablkcipher.ivsize;
|
||||
inst->alg.cra_aead.maxauthsize = auth->digestsize;
|
||||
inst->alg.ivsize = enc->cra_ablkcipher.ivsize;
|
||||
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.cra_exit = crypto_authenc_esn_exit_tfm;
|
||||
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_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;
|
||||
inst->free = crypto_authenc_esn_free,
|
||||
|
||||
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,
|
||||
};
|
||||
|
||||
|
|
|
|||
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Ссылка в новой задаче