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 | |
21 | static void *c_start(struct seq_file *m, loff_t *pos) |
22 | { |
23 | down_read(sem: &crypto_alg_sem); |
24 | return seq_list_start(head: &crypto_alg_list, pos: *pos); |
25 | } |
26 | |
27 | static void *c_next(struct seq_file *m, void *p, loff_t *pos) |
28 | { |
29 | return seq_list_next(v: p, head: &crypto_alg_list, ppos: pos); |
30 | } |
31 | |
32 | static void c_stop(struct seq_file *m, void *p) |
33 | { |
34 | up_read(sem: &crypto_alg_sem); |
35 | } |
36 | |
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, fmt: "name : %s\n" , alg->cra_name); |
42 | seq_printf(m, fmt: "driver : %s\n" , alg->cra_driver_name); |
43 | seq_printf(m, fmt: "module : %s\n" , module_name(alg->cra_module)); |
44 | seq_printf(m, fmt: "priority : %d\n" , alg->cra_priority); |
45 | seq_printf(m, fmt: "refcnt : %u\n" , refcount_read(r: &alg->cra_refcnt)); |
46 | seq_printf(m, fmt: "selftest : %s\n" , |
47 | (alg->cra_flags & CRYPTO_ALG_TESTED) ? |
48 | "passed" : "unknown" ); |
49 | seq_printf(m, fmt: "internal : %s\n" , |
50 | (alg->cra_flags & CRYPTO_ALG_INTERNAL) ? |
51 | "yes" : "no" ); |
52 | if (fips_enabled) { |
53 | seq_printf(m, fmt: "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, fmt: "type : larval\n" ); |
60 | seq_printf(m, fmt: "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, fmt: "type : cipher\n" ); |
72 | seq_printf(m, fmt: "blocksize : %u\n" , alg->cra_blocksize); |
73 | seq_printf(m, fmt: "min keysize : %u\n" , |
74 | alg->cra_cipher.cia_min_keysize); |
75 | seq_printf(m, fmt: "max keysize : %u\n" , |
76 | alg->cra_cipher.cia_max_keysize); |
77 | break; |
78 | case CRYPTO_ALG_TYPE_COMPRESS: |
79 | seq_printf(m, fmt: "type : compression\n" ); |
80 | break; |
81 | default: |
82 | seq_printf(m, fmt: "type : unknown\n" ); |
83 | break; |
84 | } |
85 | |
86 | out: |
87 | seq_putc(m, c: '\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 | |
98 | void __init crypto_init_proc(void) |
99 | { |
100 | proc_create_seq("crypto" , 0, NULL, &crypto_seq_ops); |
101 | } |
102 | |
103 | void __exit crypto_exit_proc(void) |
104 | { |
105 | remove_proc_entry("crypto" , NULL); |
106 | } |
107 | |