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(&crypto_alg_sem); 24 return seq_list_start(&crypto_alg_list, *pos); 25 } 26 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 32 static void c_stop(struct seq_file *m, void *p) 33 { 34 up_read(&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, "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 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