| 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/module.h> /* for module_name() */ |
| 15 | #include <linux/rwsem.h> |
| 16 | #include <linux/proc_fs.h> |
| 17 | #include <linux/seq_file.h> |
| 18 | #include "internal.h" |
| 19 | |
| 20 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 21 | { |
| 22 | down_read(&crypto_alg_sem); |
| 23 | return seq_list_start(&crypto_alg_list, *pos); |
| 24 | } |
| 25 | |
| 26 | static void *c_next(struct seq_file *m, void *p, loff_t *pos) |
| 27 | { |
| 28 | return seq_list_next(p, &crypto_alg_list, pos); |
| 29 | } |
| 30 | |
| 31 | static void c_stop(struct seq_file *m, void *p) |
| 32 | { |
| 33 | up_read(&crypto_alg_sem); |
| 34 | } |
| 35 | |
| 36 | static int c_show(struct seq_file *m, void *p) |
| 37 | { |
| 38 | struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list); |
| 39 | |
| 40 | seq_printf(m, "name : %s\n", alg->cra_name); |
| 41 | seq_printf(m, "driver : %s\n", alg->cra_driver_name); |
| 42 | seq_printf(m, "module : %s\n", module_name(alg->cra_module)); |
| 43 | seq_printf(m, "priority : %d\n", alg->cra_priority); |
| 44 | seq_printf(m, "refcnt : %u\n", refcount_read(&alg->cra_refcnt)); |
| 45 | seq_printf(m, "selftest : %s\n", |
| 46 | (alg->cra_flags & CRYPTO_ALG_TESTED) ? |
| 47 | "passed" : "unknown"); |
| 48 | seq_printf(m, "internal : %s\n", |
| 49 | (alg->cra_flags & CRYPTO_ALG_INTERNAL) ? |
| 50 | "yes" : "no"); |
| 51 | |
| 52 | if (alg->cra_flags & CRYPTO_ALG_LARVAL) { |
| 53 | seq_printf(m, "type : larval\n"); |
| 54 | seq_printf(m, "flags : 0x%x\n", alg->cra_flags); |
| 55 | goto out; |
| 56 | } |
| 57 | |
| 58 | if (alg->cra_type && alg->cra_type->show) { |
| 59 | alg->cra_type->show(m, alg); |
| 60 | goto out; |
| 61 | } |
| 62 | |
| 63 | switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { |
| 64 | case CRYPTO_ALG_TYPE_CIPHER: |
| 65 | seq_printf(m, "type : cipher\n"); |
| 66 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 67 | seq_printf(m, "min keysize : %u\n", |
| 68 | alg->cra_cipher.cia_min_keysize); |
| 69 | seq_printf(m, "max keysize : %u\n", |
| 70 | alg->cra_cipher.cia_max_keysize); |
| 71 | break; |
| 72 | case CRYPTO_ALG_TYPE_COMPRESS: |
| 73 | seq_printf(m, "type : compression\n"); |
| 74 | break; |
| 75 | default: |
| 76 | seq_printf(m, "type : unknown\n"); |
| 77 | break; |
| 78 | } |
| 79 | |
| 80 | out: |
| 81 | seq_putc(m, '\n'); |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static const struct seq_operations crypto_seq_ops = { |
| 86 | .start = c_start, |
| 87 | .next = c_next, |
| 88 | .stop = c_stop, |
| 89 | .show = c_show |
| 90 | }; |
| 91 | |
| 92 | void __init crypto_init_proc(void) |
| 93 | { |
| 94 | proc_create_seq("crypto", 0, NULL, &crypto_seq_ops); |
| 95 | } |
| 96 | |
| 97 | void __exit crypto_exit_proc(void) |
| 98 | { |
| 99 | remove_proc_entry("crypto", NULL); |
| 100 | } |