mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-12 05:48:39 +08:00
b5b7f08869
This patch adds the mid-level interface for asynchronous block ciphers. It also includes a generic queueing mechanism that can be used by other asynchronous crypto operations in future. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
|
|
* Asynchronous block chaining cipher operations.
|
|
*
|
|
* This is the asynchronous version of blkcipher.c indicating completion
|
|
* via a callback.
|
|
*
|
|
* 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 <crypto/algapi.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/seq_file.h>
|
|
|
|
static int setkey(struct crypto_ablkcipher *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
|
|
|
|
if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
|
|
crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return cipher->setkey(tfm, key, keylen);
|
|
}
|
|
|
|
static unsigned int crypto_ablkcipher_ctxsize(struct crypto_alg *alg, u32 type,
|
|
u32 mask)
|
|
{
|
|
return alg->cra_ctxsize;
|
|
}
|
|
|
|
static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type,
|
|
u32 mask)
|
|
{
|
|
struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
|
|
struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
|
|
|
|
if (alg->ivsize > PAGE_SIZE / 8)
|
|
return -EINVAL;
|
|
|
|
crt->setkey = setkey;
|
|
crt->encrypt = alg->encrypt;
|
|
crt->decrypt = alg->decrypt;
|
|
crt->ivsize = alg->ivsize;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
|
|
__attribute__ ((unused));
|
|
static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
|
|
{
|
|
struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;
|
|
|
|
seq_printf(m, "type : ablkcipher\n");
|
|
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
|
|
seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize);
|
|
seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize);
|
|
seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize);
|
|
seq_printf(m, "qlen : %u\n", ablkcipher->queue->qlen);
|
|
seq_printf(m, "max qlen : %u\n", ablkcipher->queue->max_qlen);
|
|
}
|
|
|
|
const struct crypto_type crypto_ablkcipher_type = {
|
|
.ctxsize = crypto_ablkcipher_ctxsize,
|
|
.init = crypto_init_ablkcipher_ops,
|
|
#ifdef CONFIG_PROC_FS
|
|
.show = crypto_ablkcipher_show,
|
|
#endif
|
|
};
|
|
EXPORT_SYMBOL_GPL(crypto_ablkcipher_type);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Asynchronous block chaining cipher type");
|