crypto: authenc - Convert to new AEAD interface
This patch converts authenc to the new AEAD interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
Родитель
7079ce62c0
Коммит
92d95ba917
592
crypto/authenc.c
592
crypto/authenc.c
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@ -1,7 +1,7 @@
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/*
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* Authenc: Simple AEAD wrapper for IPsec
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*
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* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
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* Copyright (c) 2007-2015 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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@ -14,6 +14,7 @@
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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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@ -23,26 +24,21 @@
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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typedef u8 *(*authenc_ahash_t)(struct aead_request *req, unsigned int flags);
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struct authenc_instance_ctx {
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struct crypto_ahash_spawn auth;
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struct crypto_skcipher_spawn enc;
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unsigned int reqoff;
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};
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struct crypto_authenc_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_request_ctx {
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unsigned int cryptlen;
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struct scatterlist *sg;
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struct scatterlist asg[2];
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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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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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@ -119,150 +115,35 @@ badkey:
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goto out;
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}
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static void authenc_geniv_ahash_update_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 = crypto_aead_reqtfm(req);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct authenc_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->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->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), 1);
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out:
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authenc_request_complete(req, err);
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}
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static void authenc_geniv_ahash_done(struct crypto_async_request *areq, int err)
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{
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struct aead_request *req = areq->data;
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct aead_instance *inst = aead_alg_instance(authenc);
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struct authenc_instance_ctx *ictx = aead_instance_ctx(inst);
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struct authenc_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 ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->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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scatterwalk_map_and_copy(ahreq->result, req->dst,
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req->assoclen + req->cryptlen,
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crypto_aead_authsize(authenc), 1);
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out:
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aead_request_complete(req, err);
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}
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static void authenc_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 = crypto_aead_reqtfm(req);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct authenc_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, 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);
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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_request_complete(req, err);
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}
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static void authenc_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 = crypto_aead_reqtfm(req);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct authenc_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);
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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_request_complete(req, err);
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}
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static u8 *crypto_authenc_ahash_fb(struct aead_request *req, unsigned int flags)
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static int crypto_authenc_genicv(struct aead_request *req, unsigned int flags)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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struct aead_instance *inst = aead_alg_instance(authenc);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct authenc_instance_ctx *ictx = aead_instance_ctx(inst);
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struct crypto_ahash *auth = ctx->auth;
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struct authenc_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 ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff);
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u8 *hash = areq_ctx->tail;
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int err;
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@ -270,105 +151,18 @@ static u8 *crypto_authenc_ahash_fb(struct aead_request *req, unsigned int flags)
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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, req->assoc, hash, req->assoclen);
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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,
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areq_ctx->cryptlen);
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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 u8 *crypto_authenc_ahash(struct aead_request *req, unsigned int flags)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct crypto_ahash *auth = ctx->auth;
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struct authenc_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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ahash_request_set_crypt(ahreq, areq_ctx->sg, hash,
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areq_ctx->cryptlen);
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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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ahash_request_set_crypt(ahreq, req->dst, hash,
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req->assoclen + req->cryptlen);
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ahash_request_set_callback(ahreq, flags,
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authenc_geniv_ahash_done, req);
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err = crypto_ahash_digest(ahreq);
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if (err)
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return ERR_PTR(err);
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return err;
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return hash;
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}
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static int crypto_authenc_genicv(struct aead_request *req, u8 *iv,
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unsigned int flags)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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struct authenc_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 *asg = areq_ctx->asg;
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unsigned int ivsize = crypto_aead_ivsize(authenc);
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unsigned int cryptlen = req->cryptlen;
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authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb;
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struct page *dstp;
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u8 *vdst;
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u8 *hash;
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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 (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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if (req->assoclen && sg_is_last(assoc)) {
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authenc_ahash_fn = crypto_authenc_ahash;
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sg_init_table(asg, 2);
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sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset);
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scatterwalk_crypto_chain(asg, dst, 0, 2);
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dst = asg;
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cryptlen += req->assoclen;
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}
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areq_ctx->cryptlen = cryptlen;
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areq_ctx->sg = dst;
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areq_ctx->complete = authenc_geniv_ahash_done;
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areq_ctx->update_complete = authenc_geniv_ahash_update_done;
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hash = authenc_ahash_fn(req, flags);
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if (IS_ERR(hash))
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return PTR_ERR(hash);
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scatterwalk_map_and_copy(hash, dst, cryptlen,
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scatterwalk_map_and_copy(hash, req->dst, req->assoclen + req->cryptlen,
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crypto_aead_authsize(authenc), 1);
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return 0;
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}
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@ -377,180 +171,155 @@ static void crypto_authenc_encrypt_done(struct crypto_async_request *req,
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{
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struct aead_request *areq = req->data;
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if (!err) {
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struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct authenc_request_ctx *areq_ctx = aead_request_ctx(areq);
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struct ablkcipher_request *abreq = (void *)(areq_ctx->tail
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+ ctx->reqoff);
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u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(ctx->enc);
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if (err)
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goto out;
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err = crypto_authenc_genicv(areq, iv, 0);
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err = crypto_authenc_genicv(areq, 0);
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out:
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authenc_request_complete(areq, err);
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}
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authenc_request_complete(areq, err);
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static int crypto_authenc_copy_assoc(struct aead_request *req)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct blkcipher_desc desc = {
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.tfm = ctx->null,
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};
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return crypto_blkcipher_encrypt(&desc, req->dst, req->src,
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req->assoclen);
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}
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static int crypto_authenc_encrypt(struct aead_request *req)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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struct aead_instance *inst = aead_alg_instance(authenc);
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struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
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struct authenc_instance_ctx *ictx = aead_instance_ctx(inst);
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struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
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struct crypto_ablkcipher *enc = ctx->enc;
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struct scatterlist *dst = req->dst;
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unsigned int cryptlen = req->cryptlen;
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struct ablkcipher_request *abreq = (void *)(areq_ctx->tail
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+ ctx->reqoff);
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u8 *iv = (u8 *)abreq - crypto_ablkcipher_ivsize(enc);
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struct ablkcipher_request *abreq = (void *)(areq_ctx->tail +
|
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ictx->reqoff);
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struct scatterlist *src, *dst;
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int err;
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|
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sg_init_table(areq_ctx->src, 2);
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src = scatterwalk_ffwd(areq_ctx->src, req->src, req->assoclen);
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dst = src;
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if (req->src != req->dst) {
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err = crypto_authenc_copy_assoc(req);
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if (err)
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return err;
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sg_init_table(areq_ctx->dst, 2);
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dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, req->assoclen);
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}
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|
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ablkcipher_request_set_tfm(abreq, enc);
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ablkcipher_request_set_callback(abreq, aead_request_flags(req),
|
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crypto_authenc_encrypt_done, req);
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ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv);
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memcpy(iv, req->iv, crypto_aead_ivsize(authenc));
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ablkcipher_request_set_crypt(abreq, src, dst, cryptlen, req->iv);
|
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|
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err = crypto_ablkcipher_encrypt(abreq);
|
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if (err)
|
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return err;
|
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|
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return crypto_authenc_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
|
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return crypto_authenc_genicv(req, aead_request_flags(req));
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}
|
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|
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static void crypto_authenc_givencrypt_done(struct crypto_async_request *req,
|
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static int crypto_authenc_decrypt_tail(struct aead_request *req,
|
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unsigned int flags)
|
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{
|
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
||||
struct aead_instance *inst = aead_alg_instance(authenc);
|
||||
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
|
||||
struct authenc_instance_ctx *ictx = aead_instance_ctx(inst);
|
||||
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
|
||||
struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff);
|
||||
struct ablkcipher_request *abreq = (void *)(areq_ctx->tail +
|
||||
ictx->reqoff);
|
||||
unsigned int authsize = crypto_aead_authsize(authenc);
|
||||
u8 *ihash = ahreq->result + authsize;
|
||||
struct scatterlist *src, *dst;
|
||||
|
||||
scatterwalk_map_and_copy(ihash, req->src, ahreq->nbytes, authsize, 0);
|
||||
|
||||
if (crypto_memneq(ihash, ahreq->result, authsize))
|
||||
return -EBADMSG;
|
||||
|
||||
sg_init_table(areq_ctx->src, 2);
|
||||
src = scatterwalk_ffwd(areq_ctx->src, req->src, req->assoclen);
|
||||
dst = src;
|
||||
|
||||
if (req->src != req->dst) {
|
||||
sg_init_table(areq_ctx->dst, 2);
|
||||
dst = scatterwalk_ffwd(areq_ctx->dst, req->dst, req->assoclen);
|
||||
}
|
||||
|
||||
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, src, dst,
|
||||
req->cryptlen - authsize, req->iv);
|
||||
|
||||
return crypto_ablkcipher_decrypt(abreq);
|
||||
}
|
||||
|
||||
static void authenc_verify_ahash_done(struct crypto_async_request *areq,
|
||||
int err)
|
||||
{
|
||||
struct aead_request *areq = req->data;
|
||||
struct aead_request *req = areq->data;
|
||||
|
||||
if (!err) {
|
||||
struct skcipher_givcrypt_request *greq = aead_request_ctx(areq);
|
||||
|
||||
err = crypto_authenc_genicv(areq, greq->giv, 0);
|
||||
}
|
||||
|
||||
authenc_request_complete(areq, err);
|
||||
}
|
||||
|
||||
static int crypto_authenc_givencrypt(struct aead_givcrypt_request *req)
|
||||
{
|
||||
struct crypto_aead *authenc = aead_givcrypt_reqtfm(req);
|
||||
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
|
||||
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_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;
|
||||
goto out;
|
||||
|
||||
return crypto_authenc_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
|
||||
}
|
||||
err = crypto_authenc_decrypt_tail(req, 0);
|
||||
|
||||
static int crypto_authenc_verify(struct aead_request *req,
|
||||
authenc_ahash_t authenc_ahash_fn)
|
||||
{
|
||||
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
||||
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
|
||||
u8 *ohash;
|
||||
u8 *ihash;
|
||||
unsigned int authsize;
|
||||
|
||||
areq_ctx->complete = authenc_verify_ahash_done;
|
||||
areq_ctx->update_complete = authenc_verify_ahash_update_done;
|
||||
|
||||
ohash = authenc_ahash_fn(req, CRYPTO_TFM_REQ_MAY_SLEEP);
|
||||
if (IS_ERR(ohash))
|
||||
return PTR_ERR(ohash);
|
||||
|
||||
authsize = crypto_aead_authsize(authenc);
|
||||
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_iverify(struct aead_request *req, u8 *iv,
|
||||
unsigned int cryptlen)
|
||||
{
|
||||
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
||||
struct authenc_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 *asg = areq_ctx->asg;
|
||||
unsigned int ivsize = crypto_aead_ivsize(authenc);
|
||||
authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb;
|
||||
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 (req->assoclen && sg_is_last(assoc)) {
|
||||
authenc_ahash_fn = crypto_authenc_ahash;
|
||||
sg_init_table(asg, 2);
|
||||
sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset);
|
||||
scatterwalk_crypto_chain(asg, src, 0, 2);
|
||||
src = asg;
|
||||
cryptlen += req->assoclen;
|
||||
}
|
||||
|
||||
areq_ctx->cryptlen = cryptlen;
|
||||
areq_ctx->sg = src;
|
||||
|
||||
return crypto_authenc_verify(req, authenc_ahash_fn);
|
||||
out:
|
||||
authenc_request_complete(req, err);
|
||||
}
|
||||
|
||||
static int crypto_authenc_decrypt(struct aead_request *req)
|
||||
{
|
||||
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
|
||||
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
|
||||
struct ablkcipher_request *abreq = aead_request_ctx(req);
|
||||
unsigned int cryptlen = req->cryptlen;
|
||||
unsigned int authsize = crypto_aead_authsize(authenc);
|
||||
u8 *iv = req->iv;
|
||||
struct aead_instance *inst = aead_alg_instance(authenc);
|
||||
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
|
||||
struct authenc_instance_ctx *ictx = aead_instance_ctx(inst);
|
||||
struct crypto_ahash *auth = ctx->auth;
|
||||
struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
|
||||
struct ahash_request *ahreq = (void *)(areq_ctx->tail + ictx->reqoff);
|
||||
u8 *hash = areq_ctx->tail;
|
||||
int err;
|
||||
|
||||
if (cryptlen < authsize)
|
||||
return -EINVAL;
|
||||
cryptlen -= authsize;
|
||||
hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth),
|
||||
crypto_ahash_alignmask(auth) + 1);
|
||||
|
||||
err = crypto_authenc_iverify(req, iv, cryptlen);
|
||||
ahash_request_set_tfm(ahreq, auth);
|
||||
ahash_request_set_crypt(ahreq, req->src, hash,
|
||||
req->assoclen + req->cryptlen - authsize);
|
||||
ahash_request_set_callback(ahreq, aead_request_flags(req),
|
||||
authenc_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);
|
||||
return crypto_authenc_decrypt_tail(req, aead_request_flags(req));
|
||||
}
|
||||
|
||||
static int crypto_authenc_init_tfm(struct crypto_tfm *tfm)
|
||||
static int crypto_authenc_init_tfm(struct crypto_aead *tfm)
|
||||
{
|
||||
struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
|
||||
struct authenc_instance_ctx *ictx = crypto_instance_ctx(inst);
|
||||
struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct aead_instance *inst = aead_alg_instance(tfm);
|
||||
struct authenc_instance_ctx *ictx = aead_instance_ctx(inst);
|
||||
struct crypto_authenc_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);
|
||||
|
|
@ -562,42 +331,57 @@ static int crypto_authenc_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);
|
||||
|
||||
crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
|
||||
crypto_aead_set_reqsize(
|
||||
tfm,
|
||||
sizeof(struct authenc_request_ctx) +
|
||||
ctx->reqoff +
|
||||
ictx->reqoff +
|
||||
max_t(unsigned int,
|
||||
crypto_ahash_reqsize(auth) +
|
||||
sizeof(struct ahash_request),
|
||||
sizeof(struct skcipher_givcrypt_request) +
|
||||
sizeof(struct ablkcipher_request) +
|
||||
crypto_ablkcipher_reqsize(enc)));
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_skcipher:
|
||||
crypto_free_ablkcipher(enc);
|
||||
err_free_ahash:
|
||||
crypto_free_ahash(auth);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void crypto_authenc_exit_tfm(struct crypto_tfm *tfm)
|
||||
static void crypto_authenc_exit_tfm(struct crypto_aead *tfm)
|
||||
{
|
||||
struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct crypto_authenc_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_alloc(struct rtattr **tb)
|
||||
static void crypto_authenc_free(struct aead_instance *inst)
|
||||
{
|
||||
struct authenc_instance_ctx *ctx = aead_instance_ctx(inst);
|
||||
|
||||
crypto_drop_skcipher(&ctx->enc);
|
||||
crypto_drop_ahash(&ctx->auth);
|
||||
kfree(inst);
|
||||
}
|
||||
|
||||
static int crypto_authenc_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;
|
||||
|
|
@ -607,15 +391,16 @@ static struct crypto_instance *crypto_authenc_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;
|
||||
|
||||
|
|
@ -629,13 +414,14 @@ static struct crypto_instance *crypto_authenc_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));
|
||||
|
|
@ -644,41 +430,48 @@ static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb)
|
|||
|
||||
enc = crypto_skcipher_spawn_alg(&ctx->enc);
|
||||
|
||||
ctx->reqoff = ALIGN(2 * auth->digestsize + auth_base->cra_alignmask,
|
||||
auth_base->cra_alignmask + 1);
|
||||
|
||||
err = -ENAMETOOLONG;
|
||||
if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
|
||||
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
|
||||
"authenc(%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,
|
||||
"authenc(%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_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_ctx);
|
||||
inst->alg.init = crypto_authenc_init_tfm;
|
||||
inst->alg.exit = crypto_authenc_exit_tfm;
|
||||
|
||||
inst->alg.cra_init = crypto_authenc_init_tfm;
|
||||
inst->alg.cra_exit = crypto_authenc_exit_tfm;
|
||||
inst->alg.setkey = crypto_authenc_setkey;
|
||||
inst->alg.encrypt = crypto_authenc_encrypt;
|
||||
inst->alg.decrypt = crypto_authenc_decrypt;
|
||||
|
||||
inst->alg.cra_aead.setkey = crypto_authenc_setkey;
|
||||
inst->alg.cra_aead.encrypt = crypto_authenc_encrypt;
|
||||
inst->alg.cra_aead.decrypt = crypto_authenc_decrypt;
|
||||
inst->alg.cra_aead.givencrypt = crypto_authenc_givencrypt;
|
||||
inst->free = crypto_authenc_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);
|
||||
|
|
@ -687,23 +480,12 @@ err_drop_auth:
|
|||
err_free_inst:
|
||||
kfree(inst);
|
||||
out_put_auth:
|
||||
inst = ERR_PTR(err);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void crypto_authenc_free(struct crypto_instance *inst)
|
||||
{
|
||||
struct authenc_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_tmpl = {
|
||||
.name = "authenc",
|
||||
.alloc = crypto_authenc_alloc,
|
||||
.free = crypto_authenc_free,
|
||||
.create = crypto_authenc_create,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
|
|
|
|||
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