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 <jmorris@intercode.com.au>
8 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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 (alg->cra_flags & CRYPTO_ALG_INTERNAL) ?
51 "yes" : "no");
52 if (fips_enabled) {
53 seq_printf(m, "fips : %s\n",
54 (alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL) ?
55 "no" : "yes");
56 }
57
58 if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
59 seq_printf(m, "type : larval\n");
60 seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
61 goto out;
62 }
63
64 if (alg->cra_type && alg->cra_type->show) {
65 alg->cra_type->show(m, alg);
66 goto out;
67 }
68
69 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
70 case CRYPTO_ALG_TYPE_CIPHER:
71 seq_printf(m, "type : cipher\n");
72 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
73 seq_printf(m, "min keysize : %u\n",
74 alg->cra_cipher.cia_min_keysize);
75 seq_printf(m, "max keysize : %u\n",
76 alg->cra_cipher.cia_max_keysize);
77 break;
78 case CRYPTO_ALG_TYPE_COMPRESS:
79 seq_printf(m, "type : compression\n");
80 break;
81 default:
82 seq_printf(m, "type : unknown\n");
83 break;
84 }
85
86 out:
87 seq_putc(m, '\n');
88 return 0;
89 }
90
91 static const struct seq_operations crypto_seq_ops = {
92 .start = c_start,
93 .next = c_next,
94 .stop = c_stop,
95 .show = c_show
96 };
97
crypto_init_proc(void)98 void __init crypto_init_proc(void)
99 {
100 proc_create_seq("crypto", 0, NULL, &crypto_seq_ops);
101 }
102
crypto_exit_proc(void)103 void __exit crypto_exit_proc(void)
104 {
105 remove_proc_entry("crypto", NULL);
106 }
107