Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Scatterlist Cryptographic API. |
| 3 | * |
| 4 | * Procfs information. |
| 5 | * |
| 6 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 7 | * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 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 Xu | 6521f30 | 2006-08-06 20:28:44 +1000 | [diff] [blame] | 15 | |
Arun Sharma | 6006349 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 16 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/init.h> |
| 18 | #include <linux/crypto.h> |
Paul Gortmaker | 4bb33cc | 2011-05-27 14:41:48 -0400 | [diff] [blame^] | 19 | #include <linux/module.h> /* for module_name() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/rwsem.h> |
| 21 | #include <linux/proc_fs.h> |
| 22 | #include <linux/seq_file.h> |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 23 | #include <linux/sysctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "internal.h" |
| 25 | |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 26 | #ifdef CONFIG_CRYPTO_FIPS |
| 27 | static struct ctl_table crypto_sysctl_table[] = { |
| 28 | { |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 29 | .procname = "fips_enabled", |
| 30 | .data = &fips_enabled, |
| 31 | .maxlen = sizeof(int), |
| 32 | .mode = 0444, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 33 | .proc_handler = proc_dointvec |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 34 | }, |
Eric W. Biederman | c2a86a6 | 2009-04-03 05:29:19 -0700 | [diff] [blame] | 35 | {} |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 36 | }; |
| 37 | |
| 38 | static struct ctl_table crypto_dir_table[] = { |
| 39 | { |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 40 | .procname = "crypto", |
| 41 | .mode = 0555, |
| 42 | .child = crypto_sysctl_table |
| 43 | }, |
Eric W. Biederman | c2a86a6 | 2009-04-03 05:29:19 -0700 | [diff] [blame] | 44 | {} |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 45 | }; |
| 46 | |
| 47 | static struct ctl_table_header *crypto_sysctls; |
| 48 | |
| 49 | static void crypto_proc_fips_init(void) |
| 50 | { |
| 51 | crypto_sysctls = register_sysctl_table(crypto_dir_table); |
| 52 | } |
| 53 | |
| 54 | static void crypto_proc_fips_exit(void) |
| 55 | { |
| 56 | if (crypto_sysctls) |
| 57 | unregister_sysctl_table(crypto_sysctls); |
| 58 | } |
| 59 | #else |
| 60 | #define crypto_proc_fips_init() |
| 61 | #define crypto_proc_fips_exit() |
| 62 | #endif |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 65 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | down_read(&crypto_alg_sem); |
Pavel Emelianov | 13d3189 | 2007-07-15 23:39:53 -0700 | [diff] [blame] | 67 | return seq_list_start(&crypto_alg_list, *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | static void *c_next(struct seq_file *m, void *p, loff_t *pos) |
| 71 | { |
Pavel Emelianov | 13d3189 | 2007-07-15 23:39:53 -0700 | [diff] [blame] | 72 | return seq_list_next(p, &crypto_alg_list, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | static void c_stop(struct seq_file *m, void *p) |
| 76 | { |
| 77 | up_read(&crypto_alg_sem); |
| 78 | } |
| 79 | |
| 80 | static int c_show(struct seq_file *m, void *p) |
| 81 | { |
Pavel Emelianov | 13d3189 | 2007-07-15 23:39:53 -0700 | [diff] [blame] | 82 | struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | seq_printf(m, "name : %s\n", alg->cra_name); |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 85 | seq_printf(m, "driver : %s\n", alg->cra_driver_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | seq_printf(m, "module : %s\n", module_name(alg->cra_module)); |
Herbert Xu | 5cb1454 | 2005-11-05 16:58:14 +1100 | [diff] [blame] | 87 | seq_printf(m, "priority : %d\n", alg->cra_priority); |
Herbert Xu | 6521f30 | 2006-08-06 20:28:44 +1000 | [diff] [blame] | 88 | seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt)); |
Herbert Xu | 73d3864 | 2008-08-03 21:15:23 +0800 | [diff] [blame] | 89 | seq_printf(m, "selftest : %s\n", |
| 90 | (alg->cra_flags & CRYPTO_ALG_TESTED) ? |
| 91 | "passed" : "unknown"); |
Herbert Xu | 67cd080 | 2008-11-06 14:39:16 +0800 | [diff] [blame] | 92 | |
| 93 | if (alg->cra_flags & CRYPTO_ALG_LARVAL) { |
| 94 | seq_printf(m, "type : larval\n"); |
| 95 | seq_printf(m, "flags : 0x%x\n", alg->cra_flags); |
| 96 | goto out; |
| 97 | } |
| 98 | |
| 99 | if (alg->cra_type && alg->cra_type->show) { |
| 100 | alg->cra_type->show(m, alg); |
| 101 | goto out; |
| 102 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Herbert Xu | a7581a0 | 2008-08-04 14:22:29 +0800 | [diff] [blame] | 104 | switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | case CRYPTO_ALG_TYPE_CIPHER: |
| 106 | seq_printf(m, "type : cipher\n"); |
| 107 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 108 | seq_printf(m, "min keysize : %u\n", |
| 109 | alg->cra_cipher.cia_min_keysize); |
| 110 | seq_printf(m, "max keysize : %u\n", |
| 111 | alg->cra_cipher.cia_max_keysize); |
| 112 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | case CRYPTO_ALG_TYPE_COMPRESS: |
| 114 | seq_printf(m, "type : compression\n"); |
| 115 | break; |
| 116 | default: |
Herbert Xu | 67cd080 | 2008-11-06 14:39:16 +0800 | [diff] [blame] | 117 | seq_printf(m, "type : unknown\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | break; |
| 119 | } |
| 120 | |
Herbert Xu | 67cd080 | 2008-11-06 14:39:16 +0800 | [diff] [blame] | 121 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | seq_putc(m, '\n'); |
| 123 | return 0; |
| 124 | } |
| 125 | |
Jan Engelhardt | 48c8949 | 2008-03-13 19:37:45 +0800 | [diff] [blame] | 126 | static const struct seq_operations crypto_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | .start = c_start, |
| 128 | .next = c_next, |
| 129 | .stop = c_stop, |
| 130 | .show = c_show |
| 131 | }; |
| 132 | |
| 133 | static int crypto_info_open(struct inode *inode, struct file *file) |
| 134 | { |
| 135 | return seq_open(file, &crypto_seq_ops); |
| 136 | } |
| 137 | |
Arjan van de Ven | 2b8693c | 2007-02-12 00:55:32 -0800 | [diff] [blame] | 138 | static const struct file_operations proc_crypto_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | .open = crypto_info_open, |
| 140 | .read = seq_read, |
| 141 | .llseek = seq_lseek, |
| 142 | .release = seq_release |
| 143 | }; |
| 144 | |
| 145 | void __init crypto_init_proc(void) |
| 146 | { |
Alexey Dobriyan | 607424d | 2008-03-05 19:27:51 +0800 | [diff] [blame] | 147 | proc_create("crypto", 0, NULL, &proc_crypto_ops); |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 148 | crypto_proc_fips_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 150 | |
| 151 | void __exit crypto_exit_proc(void) |
| 152 | { |
Neil Horman | ccb778e | 2008-08-05 14:13:08 +0800 | [diff] [blame] | 153 | crypto_proc_fips_exit(); |
Herbert Xu | cce9e06 | 2006-08-21 21:08:13 +1000 | [diff] [blame] | 154 | remove_proc_entry("crypto", NULL); |
| 155 | } |