blob: 3808697814d720aed2f9f5639791376586782be6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Scatterlist Cryptographic API.
3 *
4 * Procfs information.
5 *
6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
Herbert Xu5cb14542005-11-05 16:58:14 +11007 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 *
14 */
Herbert Xu6521f302006-08-06 20:28:44 +100015
Arun Sharma60063492011-07-26 16:09:06 -070016#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/init.h>
18#include <linux/crypto.h>
19#include <linux/rwsem.h>
20#include <linux/proc_fs.h>
21#include <linux/seq_file.h>
Neil Hormanccb778e2008-08-05 14:13:08 +080022#include <linux/sysctl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "internal.h"
24
Neil Hormanccb778e2008-08-05 14:13:08 +080025#ifdef CONFIG_CRYPTO_FIPS
26static struct ctl_table crypto_sysctl_table[] = {
27 {
Neil Hormanccb778e2008-08-05 14:13:08 +080028 .procname = "fips_enabled",
29 .data = &fips_enabled,
30 .maxlen = sizeof(int),
31 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -080032 .proc_handler = proc_dointvec
Neil Hormanccb778e2008-08-05 14:13:08 +080033 },
Eric W. Biedermanc2a86a62009-04-03 05:29:19 -070034 {}
Neil Hormanccb778e2008-08-05 14:13:08 +080035};
36
37static struct ctl_table crypto_dir_table[] = {
38 {
Neil Hormanccb778e2008-08-05 14:13:08 +080039 .procname = "crypto",
40 .mode = 0555,
41 .child = crypto_sysctl_table
42 },
Eric W. Biedermanc2a86a62009-04-03 05:29:19 -070043 {}
Neil Hormanccb778e2008-08-05 14:13:08 +080044};
45
46static struct ctl_table_header *crypto_sysctls;
47
48static void crypto_proc_fips_init(void)
49{
50 crypto_sysctls = register_sysctl_table(crypto_dir_table);
51}
52
53static void crypto_proc_fips_exit(void)
54{
55 if (crypto_sysctls)
56 unregister_sysctl_table(crypto_sysctls);
57}
58#else
59#define crypto_proc_fips_init()
60#define crypto_proc_fips_exit()
61#endif
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static void *c_start(struct seq_file *m, loff_t *pos)
64{
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 down_read(&crypto_alg_sem);
Pavel Emelianov13d31892007-07-15 23:39:53 -070066 return seq_list_start(&crypto_alg_list, *pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067}
68
69static void *c_next(struct seq_file *m, void *p, loff_t *pos)
70{
Pavel Emelianov13d31892007-07-15 23:39:53 -070071 return seq_list_next(p, &crypto_alg_list, pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072}
73
74static void c_stop(struct seq_file *m, void *p)
75{
76 up_read(&crypto_alg_sem);
77}
78
79static int c_show(struct seq_file *m, void *p)
80{
Pavel Emelianov13d31892007-07-15 23:39:53 -070081 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83 seq_printf(m, "name : %s\n", alg->cra_name);
Herbert Xu5cb14542005-11-05 16:58:14 +110084 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
Herbert Xu5cb14542005-11-05 16:58:14 +110086 seq_printf(m, "priority : %d\n", alg->cra_priority);
Herbert Xu6521f302006-08-06 20:28:44 +100087 seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
Herbert Xu73d38642008-08-03 21:15:23 +080088 seq_printf(m, "selftest : %s\n",
89 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
90 "passed" : "unknown");
Herbert Xu67cd0802008-11-06 14:39:16 +080091
92 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
93 seq_printf(m, "type : larval\n");
94 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
95 goto out;
96 }
97
98 if (alg->cra_type && alg->cra_type->show) {
99 alg->cra_type->show(m, alg);
100 goto out;
101 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Herbert Xua7581a02008-08-04 14:22:29 +0800103 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 case CRYPTO_ALG_TYPE_CIPHER:
105 seq_printf(m, "type : cipher\n");
106 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
107 seq_printf(m, "min keysize : %u\n",
108 alg->cra_cipher.cia_min_keysize);
109 seq_printf(m, "max keysize : %u\n",
110 alg->cra_cipher.cia_max_keysize);
111 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 case CRYPTO_ALG_TYPE_COMPRESS:
113 seq_printf(m, "type : compression\n");
114 break;
115 default:
Herbert Xu67cd0802008-11-06 14:39:16 +0800116 seq_printf(m, "type : unknown\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 break;
118 }
119
Herbert Xu67cd0802008-11-06 14:39:16 +0800120out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 seq_putc(m, '\n');
122 return 0;
123}
124
Jan Engelhardt48c89492008-03-13 19:37:45 +0800125static const struct seq_operations crypto_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 .start = c_start,
127 .next = c_next,
128 .stop = c_stop,
129 .show = c_show
130};
131
132static int crypto_info_open(struct inode *inode, struct file *file)
133{
134 return seq_open(file, &crypto_seq_ops);
135}
136
Arjan van de Ven2b8693c2007-02-12 00:55:32 -0800137static const struct file_operations proc_crypto_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 .open = crypto_info_open,
139 .read = seq_read,
140 .llseek = seq_lseek,
141 .release = seq_release
142};
143
144void __init crypto_init_proc(void)
145{
Alexey Dobriyan607424d2008-03-05 19:27:51 +0800146 proc_create("crypto", 0, NULL, &proc_crypto_ops);
Neil Hormanccb778e2008-08-05 14:13:08 +0800147 crypto_proc_fips_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148}
Herbert Xucce9e062006-08-21 21:08:13 +1000149
150void __exit crypto_exit_proc(void)
151{
Neil Hormanccb778e2008-08-05 14:13:08 +0800152 crypto_proc_fips_exit();
Herbert Xucce9e062006-08-21 21:08:13 +1000153 remove_proc_entry("crypto", NULL);
154}