/* * Scatterlist Cryptographic API. * * Procfs information. * * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ #include <linux/init.h> #include <linux/crypto.h> #include <linux/rwsem.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include "internal.h" extern struct list_head crypto_alg_list; extern struct rw_semaphore crypto_alg_sem; static void *c_start(struct seq_file *m, loff_t *pos) { struct list_head *v; loff_t n = *pos; down_read(&crypto_alg_sem); list_for_each(v, &crypto_alg_list) if (!n--) return list_entry(v, struct crypto_alg, cra_list); return NULL; } static void *c_next(struct seq_file *m, void *p, loff_t *pos) { struct list_head *v = p; (*pos)++; v = v->next; return (v == &crypto_alg_list) ? NULL : list_entry(v, struct crypto_alg, cra_list); } static void c_stop(struct seq_file *m, void *p) { up_read(&crypto_alg_sem); } static int c_show(struct seq_file *m, void *p) { struct crypto_alg *alg = (struct crypto_alg *)p; seq_printf(m, "name : %s\n", alg->cra_name); seq_printf(m, "module : %s\n", module_name(alg->cra_module)); switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) { case CRYPTO_ALG_TYPE_CIPHER: seq_printf(m, "type : cipher\n"); seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); seq_printf(m, "min keysize : %u\n", alg->cra_cipher.cia_min_keysize); seq_printf(m, "max keysize : %u\n", alg->cra_cipher.cia_max_keysize); break; case CRYPTO_ALG_TYPE_DIGEST: seq_printf(m, "type : digest\n"); seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); seq_printf(m, "digestsize : %u\n", alg->cra_digest.dia_digestsize); break; case CRYPTO_ALG_TYPE_COMPRESS: seq_printf(m, "type : compression\n"); break; default: seq_printf(m, "type : unknown\n"); break; } seq_putc(m, '\n'); return 0; } static struct seq_operations crypto_seq_ops = { .start = c_start, .next = c_next, .stop = c_stop, .show = c_show }; static int crypto_info_open(struct inode *inode, struct file *file) { return seq_open(file, &crypto_seq_ops); } static struct file_operations proc_crypto_ops = { .open = crypto_info_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release }; void __init crypto_init_proc(void) { struct proc_dir_entry *proc; proc = create_proc_entry("crypto", 0, NULL); if (proc) proc->proc_fops = &proc_crypto_ops; }