[mirror_ubuntu-artful-kernel.git] / crypto / proc.c

/*
 * Scatterlist Cryptographic API.
 *
 * Procfs information.
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.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 <asm/atomic.h>
#include <linux/init.h>
#include <linux/crypto.h>
#include <linux/rwsem.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sysctl.h>
#include "internal.h"

#ifdef CONFIG_CRYPTO_FIPS
static struct ctl_table crypto_sysctl_table[] = {
	{
		.ctl_name       = CTL_UNNUMBERED,
		.procname       = "fips_enabled",
		.data           = &fips_enabled,
		.maxlen         = sizeof(int),
		.mode           = 0444,
		.proc_handler   = &proc_dointvec
	},
	{
		.ctl_name = 0,
	},
};

static struct ctl_table crypto_dir_table[] = {
	{
		.ctl_name       = CTL_UNNUMBERED,
		.procname       = "crypto",
		.mode           = 0555,
		.child          = crypto_sysctl_table
	},
	{
		.ctl_name = 0,
	},
};

static struct ctl_table_header *crypto_sysctls;

static void crypto_proc_fips_init(void)
{
	crypto_sysctls = register_sysctl_table(crypto_dir_table);
}

static void crypto_proc_fips_exit(void)
{
	if (crypto_sysctls)
		unregister_sysctl_table(crypto_sysctls);
}
#else
#define crypto_proc_fips_init()
#define crypto_proc_fips_exit()
#endif

static void *c_start(struct seq_file *m, loff_t *pos)
{
	down_read(&crypto_alg_sem);
	return seq_list_start(&crypto_alg_list, *pos);
}

static void *c_next(struct seq_file *m, void *p, loff_t *pos)
{
	return seq_list_next(p, &crypto_alg_list, pos);
}

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 = list_entry(p, struct crypto_alg, cra_list);
	
	seq_printf(m, "name         : %s\n", alg->cra_name);
	seq_printf(m, "driver       : %s\n", alg->cra_driver_name);
	seq_printf(m, "module       : %s\n", module_name(alg->cra_module));
	seq_printf(m, "priority     : %d\n", alg->cra_priority);
	seq_printf(m, "refcnt       : %d\n", atomic_read(&alg->cra_refcnt));
	seq_printf(m, "selftest     : %s\n",
		   (alg->cra_flags & CRYPTO_ALG_TESTED) ?
		   "passed" : "unknown");
	
	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
	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:
		if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
			seq_printf(m, "type         : larval\n");
			seq_printf(m, "flags        : 0x%x\n", alg->cra_flags);
		} else if (alg->cra_type && alg->cra_type->show)
			alg->cra_type->show(m, alg);
		else
			seq_printf(m, "type         : unknown\n");
		break;
	}

	seq_putc(m, '\n');
	return 0;
}

static const 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 const 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)
{
	proc_create("crypto", 0, NULL, &proc_crypto_ops);
	crypto_proc_fips_init();
}

void __exit crypto_exit_proc(void)
{
	crypto_proc_fips_exit();
	remove_proc_entry("crypto", NULL);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Scatterlist Cryptographic API.
	3	*
	4	* Procfs information.
	5	*
	6	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5cb1454b	7	* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
1da177e4 LT	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the Free
	11	* Software Foundation; either version 2 of the License, or (at your option)
	12	* any later version.
	13	*
	14	*/
6521f302 HX	15
6521f302 HX	16	#include <asm/atomic.h>
1da177e4 LT	17	#include <linux/init.h>
	18	#include <linux/crypto.h>
	19	#include <linux/rwsem.h>
	20	#include <linux/proc_fs.h>
	21	#include <linux/seq_file.h>
ccb778e1	22	#include <linux/sysctl.h>
1da177e4 LT	23	#include "internal.h"
1da177e4 LT	24
ccb778e1 NH	25	#ifdef CONFIG_CRYPTO_FIPS
	26	static struct ctl_table crypto_sysctl_table[] = {
	27	{
	28	.ctl_name = CTL_UNNUMBERED,
	29	.procname = "fips_enabled",
	30	.data = &fips_enabled,
	31	.maxlen = sizeof(int),
	32	.mode = 0444,
	33	.proc_handler = &proc_dointvec
	34	},
	35	{
	36	.ctl_name = 0,
	37	},
	38	};
	39
	40	static struct ctl_table crypto_dir_table[] = {
	41	{
	42	.ctl_name = CTL_UNNUMBERED,
	43	.procname = "crypto",
	44	.mode = 0555,
	45	.child = crypto_sysctl_table
	46	},
	47	{
	48	.ctl_name = 0,
	49	},
	50	};
	51
	52	static struct ctl_table_header *crypto_sysctls;
	53
	54	static void crypto_proc_fips_init(void)
	55	{
	56	crypto_sysctls = register_sysctl_table(crypto_dir_table);
	57	}
	58
	59	static void crypto_proc_fips_exit(void)
	60	{
	61	if (crypto_sysctls)
	62	unregister_sysctl_table(crypto_sysctls);
	63	}
	64	#else
	65	#define crypto_proc_fips_init()
	66	#define crypto_proc_fips_exit()
	67	#endif
	68
1da177e4 LT	69	static void c_start(struct seq_file m, loff_t *pos)
1da177e4 LT	70	{
1da177e4	71	down_read(&crypto_alg_sem);
13d31894	72	return seq_list_start(&crypto_alg_list, *pos);
1da177e4 LT	73	}
	74
	75	static void c_next(struct seq_file m, void p, loff_t pos)
	76	{
13d31894	77	return seq_list_next(p, &crypto_alg_list, pos);
1da177e4 LT	78	}
	79
	80	static void c_stop(struct seq_file m, void p)
	81	{
	82	up_read(&crypto_alg_sem);
	83	}
	84
	85	static int c_show(struct seq_file m, void p)
	86	{
13d31894	87	struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list);
1da177e4 LT	88
1da177e4 LT	89	seq_printf(m, "name : %s\n", alg->cra_name);
5cb1454b	90	seq_printf(m, "driver : %s\n", alg->cra_driver_name);
1da177e4	91	seq_printf(m, "module : %s\n", module_name(alg->cra_module));
5cb1454b	92	seq_printf(m, "priority : %d\n", alg->cra_priority);
6521f302	93	seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt));
73d3864a HX	94	seq_printf(m, "selftest : %s\n",
	95	(alg->cra_flags & CRYPTO_ALG_TESTED) ?
	96	"passed" : "unknown");
1da177e4	97
a7581a01	98	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK \| CRYPTO_ALG_LARVAL)) {
1da177e4 LT	99	case CRYPTO_ALG_TYPE_CIPHER:
	100	seq_printf(m, "type : cipher\n");
	101	seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
	102	seq_printf(m, "min keysize : %u\n",
	103	alg->cra_cipher.cia_min_keysize);
	104	seq_printf(m, "max keysize : %u\n",
	105	alg->cra_cipher.cia_max_keysize);
	106	break;
	107
	108	case CRYPTO_ALG_TYPE_DIGEST:
	109	seq_printf(m, "type : digest\n");
	110	seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
	111	seq_printf(m, "digestsize : %u\n",
	112	alg->cra_digest.dia_digestsize);
	113	break;
	114	case CRYPTO_ALG_TYPE_COMPRESS:
	115	seq_printf(m, "type : compression\n");
	116	break;
	117	default:
a7581a01 HX	118	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
	119	seq_printf(m, "type : larval\n");
	120	seq_printf(m, "flags : 0x%x\n", alg->cra_flags);
	121	} else if (alg->cra_type && alg->cra_type->show)
e853c3cf HX	122	alg->cra_type->show(m, alg);
	123	else
	124	seq_printf(m, "type : unknown\n");
1da177e4 LT	125	break;
	126	}
	127
	128	seq_putc(m, '\n');
	129	return 0;
	130	}
	131
48c8949e	132	static const struct seq_operations crypto_seq_ops = {
1da177e4 LT	133	.start = c_start,
	134	.next = c_next,
	135	.stop = c_stop,
	136	.show = c_show
	137	};
	138
	139	static int crypto_info_open(struct inode inode, struct file file)
	140	{
	141	return seq_open(file, &crypto_seq_ops);
	142	}
	143
2b8693c0	144	static const struct file_operations proc_crypto_ops = {
1da177e4 LT	145	.open = crypto_info_open,
	146	.read = seq_read,
	147	.llseek = seq_lseek,
	148	.release = seq_release
	149	};
	150
	151	void __init crypto_init_proc(void)
	152	{
607424d8	153	proc_create("crypto", 0, NULL, &proc_crypto_ops);
ccb778e1	154	crypto_proc_fips_init();
1da177e4	155	}
cce9e06d HX	156
	157	void __exit crypto_exit_proc(void)
	158	{
ccb778e1	159	crypto_proc_fips_exit();
cce9e06d HX	160	remove_proc_entry("crypto", NULL);
cce9e06d HX	161	}