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/*
* ipsec_alg SHA2 hash stubs
*
* Author: JuanJo Ciarlante <jjo-ipsec@mendoza.gov.ar>
*
* $Id: ipsec_alg_sha2.c,v 1.2 2004/03/22 21:53:19 as Exp $
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
*/
#include <linux/config.h>
#include <linux/version.h>
/*
* special case: ipsec core modular with this static algo inside:
* must avoid MODULE magic for this file
*/
#if CONFIG_IPSEC_MODULE && CONFIG_IPSEC_ALG_SHA2
#undef MODULE
#endif
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h> /* printk() */
#include <linux/errno.h> /* error codes */
#include <linux/types.h> /* size_t */
#include <linux/string.h>
/* Check if __exit is defined, if not null it */
#ifndef __exit
#define __exit
#endif
/* Low freeswan header coupling */
#include "freeswan/ipsec_alg.h"
#include "libsha2/sha2.h"
#include "libsha2/hmac_sha2.h"
MODULE_AUTHOR("JuanJo Ciarlante <jjo-ipsec@mendoza.gov.ar>");
static int debug=0;
MODULE_PARM(debug, "i");
static int test=0;
MODULE_PARM(test, "i");
static int excl=0;
MODULE_PARM(excl, "i");
/* almost constants ...: draft-ietf-ipsec-ciph-aes-cbc-03.txt */
#define AH_SHA2_256 5
#define AH_SHA2_384 6
#define AH_SHA2_512 7
static int _sha256_hmac_set_key(struct ipsec_alg_auth *alg, __u8 * key_a, const __u8 * key, int keylen) {
sha256_hmac_context *hctx=(sha256_hmac_context*)(key_a);
sha256_hmac_set_key(hctx, key, keylen);
if (debug > 0)
printk(KERN_DEBUG "klips_debug: _sha256_hmac_set_key(): "
"key_a=%p key=%p keysize=%d\n",
key_a, key, keylen);
return 0;
}
static int _sha256_hmac_hash(struct ipsec_alg_auth *alg, __u8 * key_a, const __u8 * dat, int len, __u8 * hash, int hashlen) {
sha256_hmac_context *hctx=(sha256_hmac_context*)(key_a);
if (debug > 0)
printk(KERN_DEBUG "klips_debug: _sha256_hmac_hash(): "
"key_a=%p dat=%p len=%d hash=%p hashlen=%d\n",
key_a, dat, len, hash, hashlen);
sha256_hmac_hash(hctx, dat, len, hash, hashlen);
return 0;
}
static int _sha512_hmac_set_key(struct ipsec_alg_auth *alg, __u8 * key_a, const __u8 * key, int keylen) {
sha512_hmac_context *hctx=(sha512_hmac_context*)(key_a);
sha512_hmac_set_key(hctx, key, keylen);
if (debug > 0)
printk(KERN_DEBUG "klips_debug: _sha512_hmac_set_key(): "
"key_a=%p key=%p keysize=%d\n",
key_a, key, keylen);
return 0;
}
static int _sha512_hmac_hash(struct ipsec_alg_auth *alg, __u8 * key_a, const __u8 * dat, int len, __u8 * hash, int hashlen) {
sha512_hmac_context *hctx=(sha512_hmac_context*)(key_a);
if (debug > 0)
printk(KERN_DEBUG "klips_debug: _sha512_hmac_hash(): "
"key_a=%p dat=%p len=%d hash=%p hashlen=%d\n",
key_a, dat, len, hash, hashlen);
sha512_hmac_hash(hctx, dat, len, hash, hashlen);
return 0;
}
static struct ipsec_alg_auth ipsec_alg_SHA2_256 = {
ixt_version: IPSEC_ALG_VERSION,
ixt_module: THIS_MODULE,
ixt_refcnt: ATOMIC_INIT(0),
ixt_alg_type: IPSEC_ALG_TYPE_AUTH,
ixt_alg_id: AH_SHA2_256,
ixt_name: "sha2_256",
ixt_blocksize: SHA256_BLOCKSIZE,
ixt_keyminbits: 256,
ixt_keymaxbits: 256,
ixt_a_keylen: 256/8,
ixt_a_ctx_size: sizeof(sha256_hmac_context),
ixt_a_hmac_set_key: _sha256_hmac_set_key,
ixt_a_hmac_hash: _sha256_hmac_hash,
};
static struct ipsec_alg_auth ipsec_alg_SHA2_512 = {
ixt_version: IPSEC_ALG_VERSION,
ixt_module: THIS_MODULE,
ixt_refcnt: ATOMIC_INIT(0),
ixt_alg_type: IPSEC_ALG_TYPE_AUTH,
ixt_alg_id: AH_SHA2_512,
ixt_name: "sha2_512",
ixt_blocksize: SHA512_BLOCKSIZE,
ixt_keyminbits: 512,
ixt_keymaxbits: 512,
ixt_a_keylen: 512/8,
ixt_a_ctx_size: sizeof(sha512_hmac_context),
ixt_a_hmac_set_key: _sha512_hmac_set_key,
ixt_a_hmac_hash: _sha512_hmac_hash,
};
IPSEC_ALG_MODULE_INIT( ipsec_sha2_init )
{
int ret, test_ret;
if (excl) ipsec_alg_SHA2_256.ixt_state |= IPSEC_ALG_ST_EXCL;
ret=register_ipsec_alg_auth(&ipsec_alg_SHA2_256);
printk("ipsec_sha2_init(alg_type=%d alg_id=%d name=%s): ret=%d\n",
ipsec_alg_SHA2_256.ixt_alg_type,
ipsec_alg_SHA2_256.ixt_alg_id,
ipsec_alg_SHA2_256.ixt_name,
ret);
if (ret != 0)
goto out;
if (ret==0 && test) {
test_ret=ipsec_alg_test(
ipsec_alg_SHA2_256.ixt_alg_type,
ipsec_alg_SHA2_256.ixt_alg_id,
test);
printk("ipsec_sha2_init(alg_type=%d alg_id=%d): test_ret=%d\n",
ipsec_alg_SHA2_256.ixt_alg_type,
ipsec_alg_SHA2_256.ixt_alg_id,
test_ret);
}
if (excl) ipsec_alg_SHA2_512.ixt_state |= IPSEC_ALG_ST_EXCL;
ret=register_ipsec_alg_auth(&ipsec_alg_SHA2_512);
printk("ipsec_sha2_init(alg_type=%d alg_id=%d name=%s): ret=%d\n",
ipsec_alg_SHA2_512.ixt_alg_type,
ipsec_alg_SHA2_512.ixt_alg_id,
ipsec_alg_SHA2_512.ixt_name,
ret);
if (ret != 0)
goto out_256;
if (ret==0 && test) {
test_ret=ipsec_alg_test(
ipsec_alg_SHA2_512.ixt_alg_type,
ipsec_alg_SHA2_512.ixt_alg_id,
test);
printk("ipsec_sha2_init(alg_type=%d alg_id=%d): test_ret=%d\n",
ipsec_alg_SHA2_512.ixt_alg_type,
ipsec_alg_SHA2_512.ixt_alg_id,
test_ret);
}
goto out;
out_256:
unregister_ipsec_alg_auth(&ipsec_alg_SHA2_256);
out:
return ret;
}
IPSEC_ALG_MODULE_EXIT( ipsec_sha2_fini )
{
unregister_ipsec_alg_auth(&ipsec_alg_SHA2_512);
unregister_ipsec_alg_auth(&ipsec_alg_SHA2_256);
return;
}
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
EXPORT_NO_SYMBOLS;
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