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) { 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 } 101