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This patch adds the helpers crypto_clone_ahash and crypto_clone_shash. They are the hash-specific counterparts of crypto_clone_tfm. This allows code paths that cannot otherwise allocate a hash tfm object to do so. Once a new tfm has been obtained its key could then be changed without impacting other users. Note that only algorithms that implement clone_tfm can be cloned. However, all keyless hashes can be cloned by simply reusing the tfm object. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Cryptographic API.
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*
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* Copyright (c) 2023 Herbert Xu <herbert@gondor.apana.org.au>
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*/
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#ifndef _LOCAL_CRYPTO_HASH_H
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#define _LOCAL_CRYPTO_HASH_H
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#include <crypto/internal/hash.h>
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#include <linux/cryptouser.h>
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#include "internal.h"
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static inline int crypto_hash_report_stat(struct sk_buff *skb,
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struct crypto_alg *alg,
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const char *type)
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{
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struct hash_alg_common *halg = __crypto_hash_alg_common(alg);
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struct crypto_istat_hash *istat = hash_get_stat(halg);
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struct crypto_stat_hash rhash;
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memset(&rhash, 0, sizeof(rhash));
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strscpy(rhash.type, type, sizeof(rhash.type));
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rhash.stat_hash_cnt = atomic64_read(&istat->hash_cnt);
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rhash.stat_hash_tlen = atomic64_read(&istat->hash_tlen);
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rhash.stat_err_cnt = atomic64_read(&istat->err_cnt);
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return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
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}
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int crypto_init_shash_ops_async(struct crypto_tfm *tfm);
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struct crypto_ahash *crypto_clone_shash_ops_async(struct crypto_ahash *nhash,
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struct crypto_ahash *hash);
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int hash_prepare_alg(struct hash_alg_common *alg);
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#endif /* _LOCAL_CRYPTO_HASH_H */
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