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crypto_null.c
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Jonas Rabenstein / Linux
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Jussi Kivilinna authored
Combine all crypto_alg to be registered and use new crypto_[un]register_algs functions. This simplifies init/exit code. Signed-off-by:
Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
Jussi Kivilinna authoredCombine all crypto_alg to be registered and use new crypto_[un]register_algs functions. This simplifies init/exit code. Signed-off-by:
Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
crypto_null.c 4.37 KiB
/*
* Cryptographic API.
*
* Null algorithms, aka Much Ado About Nothing.
*
* These are needed for IPsec, and may be useful in general for
* testing & debugging.
*
* The null cipher is compliant with RFC2410.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
*
* 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 <crypto/internal/hash.h>
#include <crypto/internal/skcipher.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/string.h>
#define NULL_KEY_SIZE 0
#define NULL_BLOCK_SIZE 1
#define NULL_DIGEST_SIZE 0
#define NULL_IV_SIZE 0
static int null_compress(struct crypto_tfm *tfm, const u8 *src,
unsigned int slen, u8 *dst, unsigned int *dlen)
{
if (slen > *dlen)
return -EINVAL;
memcpy(dst, src, slen);
*dlen = slen;
return 0;
}
static int null_init(struct shash_desc *desc)
{
return 0;
}
static int null_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return 0;
}
static int null_final(struct shash_desc *desc, u8 *out)
{
return 0;
}
static int null_digest(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
return 0;
}
static int null_hash_setkey(struct crypto_shash *tfm, const u8 *key,
unsigned int keylen)
{ return 0; }
static int null_setkey(struct crypto_tfm *tfm, const u8 *key,
unsigned int keylen)
{ return 0; }