1 /*
2 * Scatterlist Cryptographic API.
3 *
4 * Procfs information.
5 *
6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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 */
15
16 #include <asm/atomic.h>
17 #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>
22 #include <linux/sysctl.h>
23 #include "internal.h"
24
25 #ifdef CONFIG_CRYPTO_FIPS
26 static struct ctl_table crypto_sysctl_table[] = {
27 {
28 .ctl_name = CTL_UNNUMBERED,
29 .procname = "fips_enabled",
30 .data = &fips_enabled,
31 .maxlen = sizeof(int),
32 .mode = 0444,
33 .proc_handler = &proc_dointvec
34 },
35 {
36 .ctl_name = 0,
37 },
38 };
39
40 static struct ctl_table crypto_dir_table[] = {
41 {
42 .ctl_name = CTL_UNNUMBERED,
43 .procname = "crypto",
44 .mode = 0555,
45 .child = crypto_sysctl_table
46 },
47 {
48 .ctl_name = 0,
49 },
50 };
51
52 static struct ctl_table_header *crypto_sysctls;
53
54 static void crypto_proc_fips_init(void)
55 {
56 crypto_sysctls = register_sysctl_table(crypto_dir_table);
57 }
58
59 static void crypto_proc_fips_exit(void)
60 {
61 if (crypto_sysctls)
62 unregister_sysctl_table(crypto_sysctls);
63 }
64 #else
65 #define crypto_proc_fips_init()
66 #define crypto_proc_fips_exit()
67 #endif
68
69 static void *c_start(struct seq_file *m, loff_t *pos)
70 {
71 down_read(&crypto_alg_sem);
72 return seq_list_start(&crypto_alg_list, *pos);
73 }
74
75 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
76 {
77 return seq_list_next(p, &crypto_alg_list, pos);
78 }
79
80 static void c_stop(struct seq_file *m, void *p)
81 {
82 up_read(&crypto_alg_sem);
83 }
84
85 static int c_show(struct seq_file *m, void *p)
86 {
87 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
88
89 seq_printf(m, "name : %s\n", alg->cra_name);
90 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
91 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
92 seq_printf(m, "priority : %d\n", alg->cra_priority);
93 seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
94 seq_printf(m, "selftest : %s\n",
95 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
96 "passed" : "unknown");
97
98 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
99 seq_printf(m, "type : larval\n");
100 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
101 goto out;
102 }
103
104 if (alg->cra_type && alg->cra_type->show) {
105 alg->cra_type->show(m, alg);
106 goto out;
107 }
108
109 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
110 case CRYPTO_ALG_TYPE_CIPHER:
111 seq_printf(m, "type : cipher\n");
112 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
113 seq_printf(m, "min keysize : %u\n",
114 alg->cra_cipher.cia_min_keysize);
115 seq_printf(m, "max keysize : %u\n",
116 alg->cra_cipher.cia_max_keysize);
117 break;
118
119 case CRYPTO_ALG_TYPE_DIGEST:
120 seq_printf(m, "type : digest\n");
121 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
122 seq_printf(m, "digestsize : %u\n",
123 alg->cra_digest.dia_digestsize);
124 break;
125 case CRYPTO_ALG_TYPE_COMPRESS:
126 seq_printf(m, "type : compression\n");
127 break;
128 default:
129 seq_printf(m, "type : unknown\n");
130 break;
131 }
132
133 out:
134 seq_putc(m, '\n');
135 return 0;
136 }
137
138 static const struct seq_operations crypto_seq_ops = {
139 .start = c_start,
140 .next = c_next,
141 .stop = c_stop,
142 .show = c_show
143 };
144
145 static int crypto_info_open(struct inode *inode, struct file *file)
146 {
147 return seq_open(file, &crypto_seq_ops);
148 }
149
150 static const struct file_operations proc_crypto_ops = {
151 .open = crypto_info_open,
152 .read = seq_read,
153 .llseek = seq_lseek,
154 .release = seq_release
155 };
156
157 void __init crypto_init_proc(void)
158 {
159 proc_create("crypto", 0, NULL, &proc_crypto_ops);
160 crypto_proc_fips_init();
161 }
162
163 void __exit crypto_exit_proc(void)
164 {
165 crypto_proc_fips_exit();
166 remove_proc_entry("crypto", NULL);
167 }
168
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