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