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cce9e06d10
The crypto API is made up of the part facing users such as IPsec and the low-level part which is used by cryptographic entities such as algorithms. This patch splits out the latter so that the two APIs are more clearly delineated. As a bonus the low-level API can now be modularised if all algorithms are built as modules. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
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* Scatterlist Cryptographic API.
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*
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* Procfs information.
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <asm/atomic.h>
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#include <linux/init.h>
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#include <linux/crypto.h>
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#include <linux/rwsem.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include "internal.h"
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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struct list_head *v;
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loff_t n = *pos;
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down_read(&crypto_alg_sem);
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list_for_each(v, &crypto_alg_list)
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if (!n--)
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return list_entry(v, struct crypto_alg, cra_list);
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return NULL;
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}
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static void *c_next(struct seq_file *m, void *p, loff_t *pos)
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{
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struct list_head *v = p;
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(*pos)++;
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v = v->next;
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return (v == &crypto_alg_list) ?
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NULL : list_entry(v, struct crypto_alg, cra_list);
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}
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static void c_stop(struct seq_file *m, void *p)
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{
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up_read(&crypto_alg_sem);
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}
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static int c_show(struct seq_file *m, void *p)
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{
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struct crypto_alg *alg = (struct crypto_alg *)p;
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seq_printf(m, "name : %s\n", alg->cra_name);
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seq_printf(m, "driver : %s\n", alg->cra_driver_name);
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seq_printf(m, "module : %s\n", module_name(alg->cra_module));
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seq_printf(m, "priority : %d\n", alg->cra_priority);
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seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
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switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
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case CRYPTO_ALG_TYPE_CIPHER:
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seq_printf(m, "type : cipher\n");
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seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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seq_printf(m, "min keysize : %u\n",
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alg->cra_cipher.cia_min_keysize);
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seq_printf(m, "max keysize : %u\n",
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alg->cra_cipher.cia_max_keysize);
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break;
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case CRYPTO_ALG_TYPE_DIGEST:
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seq_printf(m, "type : digest\n");
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seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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seq_printf(m, "digestsize : %u\n",
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alg->cra_digest.dia_digestsize);
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break;
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case CRYPTO_ALG_TYPE_COMPRESS:
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seq_printf(m, "type : compression\n");
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break;
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default:
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seq_printf(m, "type : unknown\n");
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break;
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}
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seq_putc(m, '\n');
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return 0;
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}
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static struct seq_operations crypto_seq_ops = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = c_show
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};
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static int crypto_info_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &crypto_seq_ops);
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}
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static struct file_operations proc_crypto_ops = {
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.open = crypto_info_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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void __init crypto_init_proc(void)
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{
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struct proc_dir_entry *proc;
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proc = create_proc_entry("crypto", 0, NULL);
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if (proc)
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proc->proc_fops = &proc_crypto_ops;
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}
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void __exit crypto_exit_proc(void)
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{
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remove_proc_entry("crypto", NULL);
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}
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