- import of strongswan-2.7.0
- applied patch for charon
This commit is contained in:
Martin Willi
@@ -0,0 +1,139 @@
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/*
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* ipsec_alg SERPENT cipher stubs
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*
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* Author: JuanJo Ciarlante <[email protected]>
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*
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* $Id: ipsec_alg_serpent.c,v 1.2 2004/03/22 21:53:19 as Exp $
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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
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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*/
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#include <linux/config.h>
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#include <linux/version.h>
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/*
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* special case: ipsec core modular with this static algo inside:
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* must avoid MODULE magic for this file
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*/
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#if CONFIG_IPSEC_MODULE && CONFIG_IPSEC_ALG_SERPENT
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#undef MODULE
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#endif
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h> /* printk() */
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#include <linux/errno.h> /* error codes */
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#include <linux/types.h> /* size_t */
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#include <linux/string.h>
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/* Check if __exit is defined, if not null it */
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#ifndef __exit
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#define __exit
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#endif
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/* Low freeswan header coupling */
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#include "freeswan/ipsec_alg.h"
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#include "libserpent/serpent.h"
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#include "libserpent/serpent_cbc.h"
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#define ESP_SERPENT 252 /* from ipsec drafts */
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/* 128, 192 or 256 */
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#define ESP_SERPENT_KEY_SZ_MIN 16 /* 128 bit secret key */
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#define ESP_SERPENT_KEY_SZ_MAX 32 /* 256 bit secret key */
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#define ESP_SERPENT_CBC_BLK_LEN 16 /* SERPENT-CBC block size */
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MODULE_AUTHOR("JuanJo Ciarlante <[email protected]>");
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static int debug=0;
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MODULE_PARM(debug, "i");
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static int test=0;
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MODULE_PARM(test, "i");
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static int excl=0;
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MODULE_PARM(excl, "i");
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static int keyminbits=0;
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MODULE_PARM(keyminbits, "i");
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static int keymaxbits=0;
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MODULE_PARM(keymaxbits, "i");
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static int _serpent_set_key(struct ipsec_alg_enc *alg, __u8 * key_e, const __u8 * key, size_t keysize) {
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serpent_context *ctx=(serpent_context *)key_e;
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if (debug > 0)
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printk(KERN_DEBUG "klips_debug:_serpent_set_key:"
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"key_e=%p key=%p keysize=%d\n",
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key_e, key, keysize);
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serpent_set_key(ctx, key, keysize);
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return 0;
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}
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static int _serpent_cbc_encrypt(struct ipsec_alg_enc *alg, __u8 * key_e, __u8 * in, int ilen, const __u8 * iv, int encrypt) {
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serpent_context *ctx=(serpent_context *)key_e;
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if (debug > 0)
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printk(KERN_DEBUG "klips_debug:_serpent_cbc_encrypt:"
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"key_e=%p in=%p ilen=%d iv=%p encrypt=%d\n",
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key_e, in, ilen, iv, encrypt);
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serpent_cbc_encrypt(ctx, in, in, ilen, iv, encrypt);
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return ilen;
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}
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static struct ipsec_alg_enc ipsec_alg_SERPENT = {
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ixt_version: IPSEC_ALG_VERSION,
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ixt_module: THIS_MODULE,
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ixt_refcnt: ATOMIC_INIT(0),
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ixt_alg_type: IPSEC_ALG_TYPE_ENCRYPT,
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ixt_alg_id: ESP_SERPENT,
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ixt_name: "serpent",
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ixt_blocksize: ESP_SERPENT_CBC_BLK_LEN,
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ixt_keyminbits: ESP_SERPENT_KEY_SZ_MIN * 8,
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ixt_keymaxbits: ESP_SERPENT_KEY_SZ_MAX * 8,
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ixt_e_keylen: ESP_SERPENT_KEY_SZ_MAX,
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ixt_e_ctx_size: sizeof(serpent_context),
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ixt_e_set_key: _serpent_set_key,
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ixt_e_cbc_encrypt:_serpent_cbc_encrypt,
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};
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IPSEC_ALG_MODULE_INIT(ipsec_serpent_init)
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{
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int ret, test_ret;
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if (keyminbits)
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ipsec_alg_SERPENT.ixt_keyminbits=keyminbits;
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if (keymaxbits) {
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ipsec_alg_SERPENT.ixt_keymaxbits=keymaxbits;
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if (keymaxbits*8>ipsec_alg_SERPENT.ixt_keymaxbits)
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ipsec_alg_SERPENT.ixt_e_keylen=keymaxbits*8;
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}
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if (excl) ipsec_alg_SERPENT.ixt_state |= IPSEC_ALG_ST_EXCL;
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ret=register_ipsec_alg_enc(&ipsec_alg_SERPENT);
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printk("ipsec_serpent_init(alg_type=%d alg_id=%d name=%s): ret=%d\n",
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ipsec_alg_SERPENT.ixt_alg_type,
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ipsec_alg_SERPENT.ixt_alg_id,
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ipsec_alg_SERPENT.ixt_name,
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ret);
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if (ret==0 && test) {
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test_ret=ipsec_alg_test(
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ipsec_alg_SERPENT.ixt_alg_type,
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ipsec_alg_SERPENT.ixt_alg_id,
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test);
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printk("ipsec_serpent_init(alg_type=%d alg_id=%d): test_ret=%d\n",
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ipsec_alg_SERPENT.ixt_alg_type,
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ipsec_alg_SERPENT.ixt_alg_id,
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test_ret);
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}
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return ret;
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}
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IPSEC_ALG_MODULE_EXIT(ipsec_serpent_fini)
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{
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unregister_ipsec_alg_enc(&ipsec_alg_SERPENT);
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return;
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}
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#ifdef MODULE_LICENSE
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MODULE_LICENSE("GPL");
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#endif
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EXPORT_NO_SYMBOLS;
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