mirror of
https://github.com/koverstreet/bcachefs-tools.git
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73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* Synchronous Cryptographic Hash operations.
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*
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* Copyright (c) 2008 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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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include "internal.h"
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static int shash_finup(struct shash_desc *desc, const u8 *data,
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unsigned len, u8 *out)
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{
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return crypto_shash_update(desc, data, len) ?:
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crypto_shash_final(desc, out);
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}
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static int shash_digest(struct shash_desc *desc, const u8 *data,
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unsigned len, u8 *out)
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{
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return crypto_shash_init(desc) ?:
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crypto_shash_finup(desc, data, len, out);
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}
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static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
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{
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struct crypto_shash *hash = __crypto_shash_cast(tfm);
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hash->descsize = crypto_shash_alg(hash)->descsize;
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return 0;
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}
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static const struct crypto_type crypto_shash_type = {
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.extsize = crypto_alg_extsize,
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.init_tfm = crypto_shash_init_tfm,
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.maskclear = ~CRYPTO_ALG_TYPE_MASK,
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.maskset = CRYPTO_ALG_TYPE_MASK,
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.type = CRYPTO_ALG_TYPE_SHASH,
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.tfmsize = offsetof(struct crypto_shash, base),
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};
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struct crypto_shash *crypto_alloc_shash(const char *alg_name,
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u32 type, u32 mask)
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{
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return crypto_alloc_tfm(alg_name, &crypto_shash_type, type, mask);
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}
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int crypto_register_shash(struct shash_alg *alg)
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{
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struct crypto_alg *base = &alg->base;
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base->cra_type = &crypto_shash_type;
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base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
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base->cra_flags |= CRYPTO_ALG_TYPE_SHASH;
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if (!alg->finup)
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alg->finup = shash_finup;
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if (!alg->digest)
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alg->digest = shash_digest;
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return crypto_register_alg(base);
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}
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