1 /* 2 * Scatterlist Cryptographic API. 3 * 4 * Procfs information. 5 * 6 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 7 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the Free 11 * Software Foundation; either version 2 of the License, or (at your option) 12 * any later version. 13 * 14 */ 15 #include <linux/init.h> 16 #include <linux/crypto.h> 17 #include <linux/rwsem.h> 18 #include <linux/proc_fs.h> 19 #include <linux/seq_file.h> 20 #include "internal.h" 21 22 static void *c_start(struct seq_file *m, loff_t *pos) 23 { 24 struct list_head *v; 25 loff_t n = *pos; 26 27 down_read(&crypto_alg_sem); 28 list_for_each(v, &crypto_alg_list) 29 if (!n--) 30 return list_entry(v, struct crypto_alg, cra_list); 31 return NULL; 32 } 33 34 static void *c_next(struct seq_file *m, void *p, loff_t *pos) 35 { 36 struct list_head *v = p; 37 38 (*pos)++; 39 v = v->next; 40 return (v == &crypto_alg_list) ? 41 NULL : list_entry(v, struct crypto_alg, cra_list); 42 } 43 44 static void c_stop(struct seq_file *m, void *p) 45 { 46 up_read(&crypto_alg_sem); 47 } 48 49 static int c_show(struct seq_file *m, void *p) 50 { 51 struct crypto_alg *alg = (struct crypto_alg *)p; 52 53 seq_printf(m, "name : %s\n", alg->cra_name); 54 seq_printf(m, "driver : %s\n", alg->cra_driver_name); 55 seq_printf(m, "module : %s\n", module_name(alg->cra_module)); 56 seq_printf(m, "priority : %d\n", alg->cra_priority); 57 58 switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { 59 case CRYPTO_ALG_TYPE_CIPHER: 60 seq_printf(m, "type : cipher\n"); 61 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 62 seq_printf(m, "min keysize : %u\n", 63 alg->cra_cipher.cia_min_keysize); 64 seq_printf(m, "max keysize : %u\n", 65 alg->cra_cipher.cia_max_keysize); 66 break; 67 68 case CRYPTO_ALG_TYPE_DIGEST: 69 seq_printf(m, "type : digest\n"); 70 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 71 seq_printf(m, "digestsize : %u\n", 72 alg->cra_digest.dia_digestsize); 73 break; 74 case CRYPTO_ALG_TYPE_COMPRESS: 75 seq_printf(m, "type : compression\n"); 76 break; 77 default: 78 seq_printf(m, "type : unknown\n"); 79 break; 80 } 81 82 seq_putc(m, '\n'); 83 return 0; 84 } 85 86 static struct seq_operations crypto_seq_ops = { 87 .start = c_start, 88 .next = c_next, 89 .stop = c_stop, 90 .show = c_show 91 }; 92 93 static int crypto_info_open(struct inode *inode, struct file *file) 94 { 95 return seq_open(file, &crypto_seq_ops); 96 } 97 98 static struct file_operations proc_crypto_ops = { 99 .open = crypto_info_open, 100 .read = seq_read, 101 .llseek = seq_lseek, 102 .release = seq_release 103 }; 104 105 void __init crypto_init_proc(void) 106 { 107 struct proc_dir_entry *proc; 108 109 proc = create_proc_entry("crypto", 0, NULL); 110 if (proc) 111 proc->proc_fops = &proc_crypto_ops; 112 } 113