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 str_yes_no(alg->cra_flags & CRYPTO_ALG_INTERNAL)); 51 if (fips_enabled) 52 seq_printf(m, "fips : %s\n", 53 str_no_yes(alg->cra_flags & CRYPTO_ALG_FIPS_INTERNAL)); 54 55 if (alg->cra_flags & CRYPTO_ALG_LARVAL) { 56 seq_printf(m, "type : larval\n"); 57 seq_printf(m, "flags : 0x%x\n", alg->cra_flags); 58 goto out; 59 } 60 61 if (alg->cra_type && alg->cra_type->show) { 62 alg->cra_type->show(m, alg); 63 goto out; 64 } 65 66 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { 67 case CRYPTO_ALG_TYPE_CIPHER: 68 seq_printf(m, "type : cipher\n"); 69 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 70 seq_printf(m, "min keysize : %u\n", 71 alg->cra_cipher.cia_min_keysize); 72 seq_printf(m, "max keysize : %u\n", 73 alg->cra_cipher.cia_max_keysize); 74 break; 75 case CRYPTO_ALG_TYPE_COMPRESS: 76 seq_printf(m, "type : compression\n"); 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 95 void __init crypto_init_proc(void) 96 { 97 proc_create_seq("crypto", 0, NULL, &crypto_seq_ops); 98 } 99 100 void __exit crypto_exit_proc(void) 101 { 102 remove_proc_entry("crypto", NULL); 103 } 104