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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 | .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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od-2011-09-04
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