mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
ce8614a312
Reference counters should use refcount_t rather than atomic_t, since the refcount_t implementation can prevent overflows, reducing the exploitability of reference leak bugs. crypto_alg.cra_refcount is a reference counter with the usual semantics, so switch it over to refcount_t. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
|
|
* Scatterlist Cryptographic API.
|
|
*
|
|
* Procfs information.
|
|
*
|
|
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
|
|
* Copyright (c) 2005 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/atomic.h>
|
|
#include <linux/init.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/module.h> /* for module_name() */
|
|
#include <linux/rwsem.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include "internal.h"
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
down_read(&crypto_alg_sem);
|
|
return seq_list_start(&crypto_alg_list, *pos);
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *p, loff_t *pos)
|
|
{
|
|
return seq_list_next(p, &crypto_alg_list, pos);
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *p)
|
|
{
|
|
up_read(&crypto_alg_sem);
|
|
}
|
|
|
|
static int c_show(struct seq_file *m, void *p)
|
|
{
|
|
struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
|
|
|
|
seq_printf(m, "name : %s\n", alg->cra_name);
|
|
seq_printf(m, "driver : %s\n", alg->cra_driver_name);
|
|
seq_printf(m, "module : %s\n", module_name(alg->cra_module));
|
|
seq_printf(m, "priority : %d\n", alg->cra_priority);
|
|
seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
|
|
seq_printf(m, "selftest : %s\n",
|
|
(alg->cra_flags & CRYPTO_ALG_TESTED) ?
|
|
"passed" : "unknown");
|
|
seq_printf(m, "internal : %s\n",
|
|
(alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
|
|
"yes" : "no");
|
|
|
|
if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
|
|
seq_printf(m, "type : larval\n");
|
|
seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
|
|
goto out;
|
|
}
|
|
|
|
if (alg->cra_type && alg->cra_type->show) {
|
|
alg->cra_type->show(m, alg);
|
|
goto out;
|
|
}
|
|
|
|
switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
|
|
case CRYPTO_ALG_TYPE_CIPHER:
|
|
seq_printf(m, "type : cipher\n");
|
|
seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
|
|
seq_printf(m, "min keysize : %u\n",
|
|
alg->cra_cipher.cia_min_keysize);
|
|
seq_printf(m, "max keysize : %u\n",
|
|
alg->cra_cipher.cia_max_keysize);
|
|
break;
|
|
case CRYPTO_ALG_TYPE_COMPRESS:
|
|
seq_printf(m, "type : compression\n");
|
|
break;
|
|
default:
|
|
seq_printf(m, "type : unknown\n");
|
|
break;
|
|
}
|
|
|
|
out:
|
|
seq_putc(m, '\n');
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations crypto_seq_ops = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = c_show
|
|
};
|
|
|
|
static int crypto_info_open(struct inode *inode, struct file *file)
|
|
{
|
|
return seq_open(file, &crypto_seq_ops);
|
|
}
|
|
|
|
static const struct file_operations proc_crypto_ops = {
|
|
.open = crypto_info_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release
|
|
};
|
|
|
|
void __init crypto_init_proc(void)
|
|
{
|
|
proc_create("crypto", 0, NULL, &proc_crypto_ops);
|
|
}
|
|
|
|
void __exit crypto_exit_proc(void)
|
|
{
|
|
remove_proc_entry("crypto", NULL);
|
|
}
|