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![Herbert Xu](/assets/img/avatar_default.png)
This patch makes /proc/crypto call the type-specific show function if one is present before calling the legacy show functions for cipher/digest/compress. This allows us to reuse the type values for those legacy types. In particular, hash and digest will share one type value while shash is phased in as the default hash type. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
167 lines
4 KiB
C
167 lines
4 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 <linux/sysctl.h>
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#include "internal.h"
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#ifdef CONFIG_CRYPTO_FIPS
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static struct ctl_table crypto_sysctl_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "fips_enabled",
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.data = &fips_enabled,
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.maxlen = sizeof(int),
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.mode = 0444,
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.proc_handler = &proc_dointvec
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},
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{
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.ctl_name = 0,
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},
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};
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static struct ctl_table crypto_dir_table[] = {
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{
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.ctl_name = CTL_UNNUMBERED,
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.procname = "crypto",
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.mode = 0555,
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.child = crypto_sysctl_table
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},
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{
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.ctl_name = 0,
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},
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};
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static struct ctl_table_header *crypto_sysctls;
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static void crypto_proc_fips_init(void)
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{
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crypto_sysctls = register_sysctl_table(crypto_dir_table);
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}
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static void crypto_proc_fips_exit(void)
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{
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if (crypto_sysctls)
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unregister_sysctl_table(crypto_sysctls);
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}
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#else
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#define crypto_proc_fips_init()
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#define crypto_proc_fips_exit()
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#endif
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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down_read(&crypto_alg_sem);
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return seq_list_start(&crypto_alg_list, *pos);
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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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return seq_list_next(p, &crypto_alg_list, pos);
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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 = list_entry(p, struct crypto_alg, cra_list);
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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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seq_printf(m, "selftest : %s\n",
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(alg->cra_flags & CRYPTO_ALG_TESTED) ?
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"passed" : "unknown");
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if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
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seq_printf(m, "type : larval\n");
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seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
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goto out;
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}
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if (alg->cra_type && alg->cra_type->show) {
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alg->cra_type->show(m, alg);
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goto out;
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}
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switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
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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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out:
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seq_putc(m, '\n');
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return 0;
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}
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static const 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 const 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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proc_create("crypto", 0, NULL, &proc_crypto_ops);
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crypto_proc_fips_init();
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}
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void __exit crypto_exit_proc(void)
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{
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crypto_proc_fips_exit();
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remove_proc_entry("crypto", NULL);
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}
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