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 __acquires_shared(&crypto_alg_sem)
23 {
24 down_read(&crypto_alg_sem);
25 return seq_list_start(&crypto_alg_list, *pos);
26 }
27
c_next(struct seq_file * m,void * p,loff_t * pos)28 static void *c_next(struct seq_file *m, void *p, loff_t *pos)
29 __must_hold_shared(&crypto_alg_sem)
30 {
31 return seq_list_next(p, &crypto_alg_list, pos);
32 }
33
c_stop(struct seq_file * m,void * p)34 static void c_stop(struct seq_file *m, void *p)
35 __releases_shared(&crypto_alg_sem)
36 {
37 up_read(&crypto_alg_sem);
38 }
39
c_show(struct seq_file * m,void * p)40 static int c_show(struct seq_file *m, void *p)
41 {
42 struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
43
44 seq_printf(m, "name : %s\n", alg->cra_name);
45 seq_printf(m, "driver : %s\n", alg->cra_driver_name);
46 seq_printf(m, "module : %s\n", module_name(alg->cra_module));
47 seq_printf(m, "priority : %d\n", alg->cra_priority);
48 seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt));
49 seq_printf(m, "selftest : %s\n",
50 (alg->cra_flags & CRYPTO_ALG_TESTED) ?
51 "passed" : "unknown");
52 seq_printf(m, "internal : %s\n",
53 str_yes_no(alg->cra_flags & CRYPTO_ALG_INTERNAL));
54 if (fips_enabled)
55 seq_printf(m, "fips : %s\n",
56 str_no_yes(alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL));
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 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