| 1 | |
| 2 | * Scatterlist Cryptographic API.
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| 3 | *
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| 4 | * Procfs information.
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| 5 | *
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| 6 | * Copyright (c) 2002 James Morris <[email protected]>
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| 7 | * Copyright (c) 2005 Herbert Xu <[email protected]>
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| 8 | *
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| 9 | * This program is free software; you can redistribute it and/or modify it
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| 10 | * under the terms of the GNU General Public License as published by the Free
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| 11 | * Software Foundation; either version 2 of the License, or (at your option)
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| 12 | * any later version.
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| 13 | *
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| 14 |
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| 15 |
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| 16 | #include <asm/atomic.h>
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| 17 | #include <linux/init.h>
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| 18 | #include <linux/crypto.h>
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| 19 | #include <linux/rwsem.h>
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| 20 | #include <linux/proc_fs.h>
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| 21 | #include <linux/seq_file.h>
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| 22 | #include "internal.h"
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| 23 |
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| 24 | static void *c_start(struct seq_file *m, loff_t *pos)
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| 25 | {
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| 26 | struct list_head *v;
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| 27 | loff_t n = *pos;
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| 28 |
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| 29 | down_read(&crypto_alg_sem);
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| 30 | list_for_each(v, &crypto_alg_list)
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| 31 | if (!n--)
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| 32 | return list_entry(v, struct crypto_alg, cra_list);
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| 33 | return NULL;
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| 34 | }
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| 35 |
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| 36 | static void *c_next(struct seq_file *m, void *p, loff_t *pos)
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| 37 | {
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| 38 | struct list_head *v = p;
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| 39 |
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| 40 | (*pos)++;
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| 41 | v = v->next;
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| 42 | return (v == &crypto_alg_list) ?
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| 43 | NULL : list_entry(v, struct crypto_alg, cra_list);
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| 44 | }
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| 45 |
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| 46 | static void c_stop(struct seq_file *m, void *p)
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| 47 | {
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| 48 | up_read(&crypto_alg_sem);
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| 49 | }
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| 50 |
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| 51 | static int c_show(struct seq_file *m, void *p)
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| 52 | {
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| 53 | struct crypto_alg *alg = (struct crypto_alg *)p;
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| 54 |
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| 55 | seq_printf(m, "name : %s\n", alg->cra_name);
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| 56 | seq_printf(m, "driver : %s\n", alg->cra_driver_name);
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| 57 | seq_printf(m, "module : %s\n", module_name(alg->cra_module));
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| 58 | seq_printf(m, "priority : %d\n", alg->cra_priority);
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| 59 | seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
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| 60 |
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| 61 | switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
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| 62 | case CRYPTO_ALG_TYPE_CIPHER:
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| 63 | seq_printf(m, "type : cipher\n");
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| 64 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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| 65 | seq_printf(m, "min keysize : %u\n",
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| 66 | alg->cra_cipher.cia_min_keysize);
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| 67 | seq_printf(m, "max keysize : %u\n",
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| 68 | alg->cra_cipher.cia_max_keysize);
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| 69 | break;
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| 70 |
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| 71 | case CRYPTO_ALG_TYPE_DIGEST:
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| 72 | seq_printf(m, "type : digest\n");
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| 73 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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| 74 | seq_printf(m, "digestsize : %u\n",
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| 75 | alg->cra_digest.dia_digestsize);
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| 76 | break;
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| 77 | case CRYPTO_ALG_TYPE_COMPRESS:
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| 78 | seq_printf(m, "type : compression\n");
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| 79 | break;
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| 80 | default:
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| 81 | if (alg->cra_type && alg->cra_type->show)
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| 82 | alg->cra_type->show(m, alg);
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| 83 | else
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| 84 | seq_printf(m, "type : unknown\n");
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| 85 | break;
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| 86 | }
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| 87 |
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| 88 | seq_putc(m, '\n');
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| 89 | return 0;
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| 90 | }
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| 91 |
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| 92 | static struct seq_operations crypto_seq_ops = {
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| 93 | .start = c_start,
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| 94 | .next = c_next,
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| 95 | .stop = c_stop,
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| 96 | .show = c_show
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| 97 | };
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| 98 |
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| 99 | static int crypto_info_open(struct inode *inode, struct file *file)
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| 100 | {
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| 101 | return seq_open(file, &crypto_seq_ops);
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| 102 | }
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| 103 |
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| 104 | static const struct file_operations proc_crypto_ops = {
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| 105 | .open = crypto_info_open,
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| 106 | .read = seq_read,
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| 107 | .llseek = seq_lseek,
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| 108 | .release = seq_release
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| 109 | };
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| 110 |
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| 111 | void __init crypto_init_proc(void)
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| 112 | {
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| 113 | struct proc_dir_entry *proc;
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| 114 |
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| 115 | proc = create_proc_entry("crypto", 0, NULL);
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| 116 | if (proc)
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| 117 | proc->proc_fops = &proc_crypto_ops;
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| 118 | }
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| 119 |
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| 120 | void __exit crypto_exit_proc(void)
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| 121 | {
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| 122 | remove_proc_entry("crypto", NULL);
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| 123 | }
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