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In the quest to remove all stack VLA usage from the kernel[1], this replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(), which uses a fixed stack size. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Cc: Himanshu Jha <himanshujha199640@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _CIPHER_H_
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#define _CIPHER_H_
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#include "common.h"
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#include "core.h"
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#define QCE_MAX_KEY_SIZE 64
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struct qce_cipher_ctx {
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u8 enc_key[QCE_MAX_KEY_SIZE];
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unsigned int enc_keylen;
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struct crypto_sync_skcipher *fallback;
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};
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/**
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* struct qce_cipher_reqctx - holds private cipher objects per request
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* @flags: operation flags
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* @iv: pointer to the IV
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* @ivsize: IV size
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* @src_nents: source entries
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* @dst_nents: destination entries
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* @result_sg: scatterlist used for result buffer
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* @dst_tbl: destination sg table
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* @dst_sg: destination sg pointer table beginning
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* @src_tbl: source sg table
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* @src_sg: source sg pointer table beginning;
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* @cryptlen: crypto length
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*/
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struct qce_cipher_reqctx {
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unsigned long flags;
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u8 *iv;
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unsigned int ivsize;
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int src_nents;
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int dst_nents;
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struct scatterlist result_sg;
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struct sg_table dst_tbl;
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struct scatterlist *dst_sg;
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struct sg_table src_tbl;
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struct scatterlist *src_sg;
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unsigned int cryptlen;
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};
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static inline struct qce_alg_template *to_cipher_tmpl(struct crypto_tfm *tfm)
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{
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struct crypto_alg *alg = tfm->__crt_alg;
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return container_of(alg, struct qce_alg_template, alg.crypto);
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}
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extern const struct qce_algo_ops ablkcipher_ops;
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#endif /* _CIPHER_H_ */
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