5cb1454b86
This is the first step on the road towards asynchronous support in the Crypto API. It adds support for having multiple crypto_alg objects for the same algorithm registered in the system. For example, each device driver would register a crypto_alg object for each algorithm that it supports. While at the same time the user may load software implementations of those same algorithms. Users of the Crypto API may then select a specific implementation by name, or choose any implementation for a given algorithm with the highest priority. The priority field is a 32-bit signed integer. In future it will be possible to modify it from user-space. This also provides a solution to the problem of selecting amongst various AES implementations, that is, aes vs. aes-i586 vs. aes-padlock. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
113 lines
2.8 KiB
C
113 lines
2.8 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 <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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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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