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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
26static 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
40static 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
52static struct ctl_table_header *crypto_sysctls;
53
54static void crypto_proc_fips_init(void)
55{
56 crypto_sysctls = register_sysctl_table(crypto_dir_table);
57}
58
59static 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
69static 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
75static 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
80static void c_stop(struct seq_file *m, void *p)
81{
82 up_read(&crypto_alg_sem);
83}
84
85static 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 switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
99 case CRYPTO_ALG_TYPE_CIPHER:
100 seq_printf(m, "type : cipher\n");
101 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
102 seq_printf(m, "min keysize : %u\n",
103 alg->cra_cipher.cia_min_keysize);
104 seq_printf(m, "max keysize : %u\n",
105 alg->cra_cipher.cia_max_keysize);
106 break;
107
108 case CRYPTO_ALG_TYPE_DIGEST:
109 seq_printf(m, "type : digest\n");
110 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
111 seq_printf(m, "digestsize : %u\n",
112 alg->cra_digest.dia_digestsize);
113 break;
114 case CRYPTO_ALG_TYPE_COMPRESS:
115 seq_printf(m, "type : compression\n");
116 break;
117 default:
118 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
119 seq_printf(m, "type : larval\n");
120 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
121 } else if (alg->cra_type && alg->cra_type->show)
122 alg->cra_type->show(m, alg);
123 else
124 seq_printf(m, "type : unknown\n");
125 break;
126 }
127
128 seq_putc(m, '\n');
129 return 0;
130}
131
132static const struct seq_operations crypto_seq_ops = {
133 .start = c_start,
134 .next = c_next,
135 .stop = c_stop,
136 .show = c_show
137};
138
139static int crypto_info_open(struct inode *inode, struct file *file)
140{
141 return seq_open(file, &crypto_seq_ops);
142}
143
144static const struct file_operations proc_crypto_ops = {
145 .open = crypto_info_open,
146 .read = seq_read,
147 .llseek = seq_lseek,
148 .release = seq_release
149};
150
151void __init crypto_init_proc(void)
152{
153 proc_create("crypto", 0, NULL, &proc_crypto_ops);
154 crypto_proc_fips_init();
155}
156
157void __exit crypto_exit_proc(void)
158{
159 crypto_proc_fips_exit();
160 remove_proc_entry("crypto", NULL);
161}
162
