linux/crypto/hash.c
Herbert Xu 27d2a33007 [CRYPTO] api: Allow multiple frontends per backend
This patch adds support for multiple frontend types for each backend
algorithm by passing the type and mask through to the backend type
init function.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2007-02-07 09:21:01 +11:00

62 lines
1.6 KiB
C

/*
* Cryptographic Hash operations.
*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.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 <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include "internal.h"
static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type,
u32 mask)
{
return alg->cra_ctxsize;
}
static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
{
struct hash_tfm *crt = &tfm->crt_hash;
struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
if (alg->digestsize > crypto_tfm_alg_blocksize(tfm))
return -EINVAL;
crt->init = alg->init;
crt->update = alg->update;
crt->final = alg->final;
crt->digest = alg->digest;
crt->setkey = alg->setkey;
crt->digestsize = alg->digestsize;
return 0;
}
static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
__attribute_used__;
static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : hash\n");
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
seq_printf(m, "digestsize : %u\n", alg->cra_hash.digestsize);
}
const struct crypto_type crypto_hash_type = {
.ctxsize = crypto_hash_ctxsize,
.init = crypto_init_hash_ops,
#ifdef CONFIG_PROC_FS
.show = crypto_hash_show,
#endif
};
EXPORT_SYMBOL_GPL(crypto_hash_type);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Generic cryptographic hash type");