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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 | .procname = "fips_enabled", | |
29 | .data = &fips_enabled, | |
30 | .maxlen = sizeof(int), | |
31 | .mode = 0444, | |
32 | .proc_handler = proc_dointvec | |
33 | }, | |
34 | {} | |
35 | }; | |
36 | ||
37 | static struct ctl_table crypto_dir_table[] = { | |
38 | { | |
39 | .procname = "crypto", | |
40 | .mode = 0555, | |
41 | .child = crypto_sysctl_table | |
42 | }, | |
43 | {} | |
44 | }; | |
45 | ||
46 | static struct ctl_table_header *crypto_sysctls; | |
47 | ||
48 | static void crypto_proc_fips_init(void) | |
49 | { | |
50 | crypto_sysctls = register_sysctl_table(crypto_dir_table); | |
51 | } | |
52 | ||
53 | static 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 | ||
63 | static void *c_start(struct seq_file *m, loff_t *pos) | |
64 | { | |
65 | down_read(&crypto_alg_sem); | |
66 | return seq_list_start(&crypto_alg_list, *pos); | |
67 | } | |
68 | ||
69 | static void *c_next(struct seq_file *m, void *p, loff_t *pos) | |
70 | { | |
71 | return seq_list_next(p, &crypto_alg_list, pos); | |
72 | } | |
73 | ||
74 | static void c_stop(struct seq_file *m, void *p) | |
75 | { | |
76 | up_read(&crypto_alg_sem); | |
77 | } | |
78 | ||
79 | static int c_show(struct seq_file *m, void *p) | |
80 | { | |
81 | struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list); | |
82 | ||
83 | seq_printf(m, "name : %s\n", alg->cra_name); | |
84 | seq_printf(m, "driver : %s\n", alg->cra_driver_name); | |
85 | seq_printf(m, "module : %s\n", module_name(alg->cra_module)); | |
86 | seq_printf(m, "priority : %d\n", alg->cra_priority); | |
87 | seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt)); | |
88 | seq_printf(m, "selftest : %s\n", | |
89 | (alg->cra_flags & CRYPTO_ALG_TESTED) ? | |
90 | "passed" : "unknown"); | |
91 | ||
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 | } | |
102 | ||
103 | switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { | |
104 | 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; | |
112 | case CRYPTO_ALG_TYPE_COMPRESS: | |
113 | seq_printf(m, "type : compression\n"); | |
114 | break; | |
115 | default: | |
116 | seq_printf(m, "type : unknown\n"); | |
117 | break; | |
118 | } | |
119 | ||
120 | out: | |
121 | seq_putc(m, '\n'); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static const struct seq_operations crypto_seq_ops = { | |
126 | .start = c_start, | |
127 | .next = c_next, | |
128 | .stop = c_stop, | |
129 | .show = c_show | |
130 | }; | |
131 | ||
132 | static int crypto_info_open(struct inode *inode, struct file *file) | |
133 | { | |
134 | return seq_open(file, &crypto_seq_ops); | |
135 | } | |
136 | ||
137 | static const struct file_operations proc_crypto_ops = { | |
138 | .open = crypto_info_open, | |
139 | .read = seq_read, | |
140 | .llseek = seq_lseek, | |
141 | .release = seq_release | |
142 | }; | |
143 | ||
144 | void __init crypto_init_proc(void) | |
145 | { | |
146 | proc_create("crypto", 0, NULL, &proc_crypto_ops); | |
147 | crypto_proc_fips_init(); | |
148 | } | |
149 | ||
150 | void __exit crypto_exit_proc(void) | |
151 | { | |
152 | crypto_proc_fips_exit(); | |
153 | remove_proc_entry("crypto", NULL); | |
154 | } |