root/crypto/proc.c

DEFINITIONS

1. crypto_proc_fips_init
2. crypto_proc_fips_exit
3. c_start
4. c_next
5. c_stop
6. c_show
7. crypto_info_open
8. crypto_init_proc
9. crypto_exit_proc

/*
 * 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 <asm/atomic.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/rwsem.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sysctl.h>
#include "internal.h"

#ifdef CONFIG_CRYPTO_FIPS
static struct ctl_table crypto_sysctl_table[] = {
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "fips_enabled",
                .data           = &fips_enabled,
                .maxlen         = sizeof(int),
                .mode           = 0444,
                .proc_handler   = &proc_dointvec
        },
        {
                .ctl_name = 0,
        },
};

static struct ctl_table crypto_dir_table[] = {
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "crypto",
                .mode           = 0555,
                .child          = crypto_sysctl_table
        },
        {
                .ctl_name = 0,
        },
};

static struct ctl_table_header *crypto_sysctls;

static void crypto_proc_fips_init(void)
{
        crypto_sysctls = register_sysctl_table(crypto_dir_table);
}

static void crypto_proc_fips_exit(void)
{
        if (crypto_sysctls)
                unregister_sysctl_table(crypto_sysctls);
}
#else
#define crypto_proc_fips_init()
#define crypto_proc_fips_exit()
#endif

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       : %d\n", atomic_read(&alg->cra_refcnt));
        seq_printf(m, "selftest     : %s\n",
                   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
                   "passed" : "unknown");
        
        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_DIGEST:
                seq_printf(m, "type         : digest\n");
                seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
                seq_printf(m, "digestsize   : %u\n",
                           alg->cra_digest.dia_digestsize);
                break;
        case CRYPTO_ALG_TYPE_COMPRESS:
                seq_printf(m, "type         : compression\n");
                break;
        default:
                if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
                        seq_printf(m, "type         : larval\n");
                        seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
                } else if (alg->cra_type && alg->cra_type->show)
                        alg->cra_type->show(m, alg);
                else
                        seq_printf(m, "type         : unknown\n");
                break;
        }

        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);
        crypto_proc_fips_init();
}

void __exit crypto_exit_proc(void)
{
        crypto_proc_fips_exit();
        remove_proc_entry("crypto", NULL);
}