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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 | } |