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/*
* Cryptographic API.
*
* SHA-256, as specified in
* http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
*
* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
*
* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <linux/bitops.h>
#include <linux/byteorder.h>
#include <linux/types.h>
#include <asm/unaligned.h>
#include <linux/crypto.h>
#include <crypto/hash.h>
#include <sodium/crypto_hash_sha256.h>
static struct shash_alg sha256_alg;
static int sha256_init(struct shash_desc *desc)
{
crypto_hash_sha256_state *state = (void *) desc->ctx;
return crypto_hash_sha256_init(state);
}
static int sha256_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
crypto_hash_sha256_state *state = (void *) desc->ctx;
return crypto_hash_sha256_update(state, data, len);
}
static int sha256_final(struct shash_desc *desc, u8 *out)
{
crypto_hash_sha256_state *state = (void *) desc->ctx;
return crypto_hash_sha256_final(state, out);
}
static void *sha256_alloc_tfm(void)
{
struct crypto_shash *tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
if (!tfm)
return NULL;
tfm->base.alg = &sha256_alg.base;
tfm->descsize = sizeof(crypto_hash_sha256_state);
return tfm;
}
static struct shash_alg sha256_alg = {
.digestsize = crypto_hash_sha256_BYTES,
.init = sha256_init,
.update = sha256_update,
.final = sha256_final,
.descsize = sizeof(crypto_hash_sha256_state),
.base.cra_name = "sha256",
.base.alloc_tfm = sha256_alloc_tfm,
};
__attribute__((constructor(110)))
static int __init sha256_generic_mod_init(void)
{
return crypto_register_shash(&sha256_alg);
}
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