1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Scatterlist Cryptographic API.
4 *
5 * Procfs information.
6 *
7 * Copyright (c) 2002 James Morris <[email protected]>
8 * Copyright (c) 2005 Herbert Xu <[email protected]>
9 */
10
11 #include <linux/atomic.h>
12 #include <linux/init.h>
13 #include <linux/crypto.h>
14 #include <linux/fips.h>
15 #include <linux/module.h> /* for module_name() */
16 #include <linux/rwsem.h>
17 #include <linux/proc_fs.h>
18 #include <linux/seq_file.h>
19 #include "internal.h"
20
c_start(struct seq_file * m,loff_t * pos)21 static void *c_start(struct seq_file *m, loff_t *pos)
22 {
23 down_read(&crypto_alg_sem);
24 return seq_list_start(&crypto_alg_list, *pos);
25 }
26
c_next(struct seq_file * m,void * p,loff_t * pos)27 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
28 {
29 return seq_list_next(p, &crypto_alg_list, pos);
30 }
31
c_stop(struct seq_file * m,void * p)32 static void c_stop(struct seq_file *m, void *p)
33 {
34 up_read(&crypto_alg_sem);
35 }
36
c_show(struct seq_file * m,void * p)37 static int c_show(struct seq_file *m, void *p)
38 {
39 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
40
41 seq_printf(m, "name : %s\n", alg->cra_name);
42 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
43 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
44 seq_printf(m, "priority : %d\n", alg->cra_priority);
45 seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
46 seq_printf(m, "selftest : %s\n",
47 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
48 "passed" : "unknown");
49 seq_printf(m, "internal : %s\n",
50 str_yes_no(alg->cra_flags & CRYPTO_ALG_INTERNAL));
51 if (fips_enabled)
52 seq_printf(m, "fips : %s\n",
53 str_no_yes(alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL));
54
55 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
56 seq_printf(m, "type : larval\n");
57 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
58 goto out;
59 }
60
61 if (alg->cra_type && alg->cra_type->show) {
62 alg->cra_type->show(m, alg);
63 goto out;
64 }
65
66 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
67 case CRYPTO_ALG_TYPE_CIPHER:
68 seq_printf(m, "type : cipher\n");
69 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
70 seq_printf(m, "min keysize : %u\n",
71 alg->cra_cipher.cia_min_keysize);
72 seq_printf(m, "max keysize : %u\n",
73 alg->cra_cipher.cia_max_keysize);
74 break;
75 case CRYPTO_ALG_TYPE_COMPRESS:
76 seq_printf(m, "type : compression\n");
77 break;
78 default:
79 seq_printf(m, "type : unknown\n");
80 break;
81 }
82
83 out:
84 seq_putc(m, '\n');
85 return 0;
86 }
87
88 static const struct seq_operations crypto_seq_ops = {
89 .start = c_start,
90 .next = c_next,
91 .stop = c_stop,
92 .show = c_show
93 };
94
crypto_init_proc(void)95 void __init crypto_init_proc(void)
96 {
97 proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
98 }
99
crypto_exit_proc(void)100 void __exit crypto_exit_proc(void)
101 {
102 remove_proc_entry("crypto", NULL);
103 }
104