mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Herbert Xu](/assets/img/avatar_default.png)
This patch ensures that kernel.h and slab.h are included for the setkey_unaligned function. It also breaks a couple of long lines. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
99 lines
2.7 KiB
C
99 lines
2.7 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/slab.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 hash_setkey_unaligned(struct crypto_hash *crt, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_hash_tfm(crt);
|
|
struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
|
|
unsigned long alignmask = crypto_hash_alignmask(crt);
|
|
int ret;
|
|
u8 *buffer, *alignbuffer;
|
|
unsigned long absize;
|
|
|
|
absize = keylen + alignmask;
|
|
buffer = kmalloc(absize, GFP_ATOMIC);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
|
|
memcpy(alignbuffer, key, keylen);
|
|
ret = alg->setkey(crt, alignbuffer, keylen);
|
|
memset(alignbuffer, 0, keylen);
|
|
kfree(buffer);
|
|
return ret;
|
|
}
|
|
|
|
static int hash_setkey(struct crypto_hash *crt, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_hash_tfm(crt);
|
|
struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
|
|
unsigned long alignmask = crypto_hash_alignmask(crt);
|
|
|
|
if ((unsigned long)key & alignmask)
|
|
return hash_setkey_unaligned(crt, key, keylen);
|
|
|
|
return alg->setkey(crt, key, keylen);
|
|
}
|
|
|
|
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 = hash_setkey;
|
|
crt->digestsize = alg->digestsize;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
|
|
__attribute__ ((unused));
|
|
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");
|