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ah_core.c
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ah_core.c
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/* $NetBSD: ah_core.c,v 1.44 2007/05/23 17:15:00 christos Exp $ */
/* $KAME: ah_core.c,v 1.57 2003/07/25 09:33:36 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* RFC1826/2402 authentication header.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ah_core.c,v 1.44 2007/05/23 17:15:00 christos Exp $");
#include "opt_inet.h"
#include "opt_ipsec.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_var.h>
#ifdef INET6
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#include <netinet6/scope6_var.h>
#endif
#include <netinet6/ipsec.h>
#include <netinet6/ah.h>
#include <netinet6/ah_aesxcbcmac.h>
#ifdef IPSEC_ESP
#include <netinet6/esp.h>
#endif
#include <net/pfkeyv2.h>
#include <netkey/keydb.h>
#include <sys/md5.h>
#define MD5_RESULTLEN 16
#include <sys/sha1.h>
#define SHA1_RESULTLEN 20
#include <sys/sha2.h>
#include <sys/rmd160.h>
#define RIPEMD160_RESULTLEN 20
#include <net/net_osdep.h>
static int ah_sumsiz_1216 __P((struct secasvar *));
static int ah_sumsiz_zero __P((struct secasvar *));
static int ah_common_mature __P((struct secasvar *));
static int ah_none_mature __P((struct secasvar *));
static int ah_none_init __P((struct ah_algorithm_state *, struct secasvar *));
static void ah_none_loop __P((struct ah_algorithm_state *, u_int8_t *, size_t));
static void ah_none_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_keyed_md5_mature __P((struct secasvar *));
static int ah_keyed_md5_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_keyed_md5_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_keyed_md5_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_keyed_sha1_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_keyed_sha1_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_keyed_sha1_result __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static int ah_hmac_md5_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_hmac_md5_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_hmac_md5_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_hmac_sha1_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_hmac_sha1_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_hmac_sha1_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_hmac_sha2_256_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_hmac_sha2_256_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_hmac_sha2_256_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_hmac_sha2_384_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_hmac_sha2_384_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_hmac_sha2_384_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_hmac_sha2_512_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_hmac_sha2_512_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_hmac_sha2_512_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static int ah_hmac_ripemd160_init __P((struct ah_algorithm_state *,
struct secasvar *));
static void ah_hmac_ripemd160_loop __P((struct ah_algorithm_state *, u_int8_t *,
size_t));
static void ah_hmac_ripemd160_result __P((struct ah_algorithm_state *,
u_int8_t *, size_t));
static void ah_update_mbuf __P((struct mbuf *, int, int,
const struct ah_algorithm *, struct ah_algorithm_state *));
/* checksum algorithms */
static const struct ah_algorithm ah_algorithms[] = {
{ ah_sumsiz_1216, ah_common_mature, 128, 128, "hmac-md5",
ah_hmac_md5_init, ah_hmac_md5_loop,
ah_hmac_md5_result, },
{ ah_sumsiz_1216, ah_common_mature, 160, 160, "hmac-sha1",
ah_hmac_sha1_init, ah_hmac_sha1_loop,
ah_hmac_sha1_result, },
{ ah_sumsiz_1216, ah_keyed_md5_mature, 128, 128, "keyed-md5",
ah_keyed_md5_init, ah_keyed_md5_loop,
ah_keyed_md5_result, },
{ ah_sumsiz_1216, ah_common_mature, 160, 160, "keyed-sha1",
ah_keyed_sha1_init, ah_keyed_sha1_loop,
ah_keyed_sha1_result, },
{ ah_sumsiz_zero, ah_none_mature, 0, 2048, "none",
ah_none_init, ah_none_loop, ah_none_result, },
{ ah_sumsiz_1216, ah_common_mature, 256, 256,
"hmac-sha2-256",
ah_hmac_sha2_256_init, ah_hmac_sha2_256_loop,
ah_hmac_sha2_256_result, },
{ ah_sumsiz_1216, ah_common_mature, 384, 384,
"hmac-sha2-384",
ah_hmac_sha2_384_init, ah_hmac_sha2_384_loop,
ah_hmac_sha2_384_result, },
{ ah_sumsiz_1216, ah_common_mature, 512, 512,
"hmac-sha2-512",
ah_hmac_sha2_512_init, ah_hmac_sha2_512_loop,
ah_hmac_sha2_512_result, },
{ ah_sumsiz_1216, ah_common_mature, 160, 160,
"hmac-ripemd160",
ah_hmac_ripemd160_init, ah_hmac_ripemd160_loop,
ah_hmac_ripemd160_result, },
{ ah_sumsiz_1216, ah_common_mature, 128, 128,
"aes-xcbc-mac",
ah_aes_xcbc_mac_init, ah_aes_xcbc_mac_loop,
ah_aes_xcbc_mac_result, },
};
const struct ah_algorithm *
ah_algorithm_lookup(int idx)
{
switch (idx) {
case SADB_AALG_MD5HMAC:
return &ah_algorithms[0];
case SADB_AALG_SHA1HMAC:
return &ah_algorithms[1];
case SADB_X_AALG_MD5:
return &ah_algorithms[2];
case SADB_X_AALG_SHA:
return &ah_algorithms[3];
case SADB_X_AALG_NULL:
return &ah_algorithms[4];
case SADB_X_AALG_SHA2_256:
return &ah_algorithms[5];
case SADB_X_AALG_SHA2_384:
return &ah_algorithms[6];
case SADB_X_AALG_SHA2_512:
return &ah_algorithms[7];
case SADB_X_AALG_RIPEMD160HMAC:
return &ah_algorithms[8];
case SADB_X_AALG_AES_XCBC_MAC:
return &ah_algorithms[9];
default:
return NULL;
}
}
static int
ah_sumsiz_1216(struct secasvar *sav)
{
if (!sav)
panic("ah_sumsiz_1216: null pointer is passed");
if (sav->flags & SADB_X_EXT_OLD)
return 16;
else
return 12;
}
static int
ah_sumsiz_zero(struct secasvar *sav)
{
if (!sav)
panic("ah_sumsiz_zero: null pointer is passed");
return 0;
}
static int
ah_common_mature(struct secasvar *sav)
{
const struct ah_algorithm *algo;
if (!sav->key_auth) {
ipseclog((LOG_ERR, "ah_common_mature: no key is given.\n"));
return 1;
}
algo = ah_algorithm_lookup(sav->alg_auth);
if (!algo) {
ipseclog((LOG_ERR, "ah_common_mature: unsupported algorithm.\n"));
return 1;
}
if (sav->key_auth->sadb_key_bits < algo->keymin ||
algo->keymax < sav->key_auth->sadb_key_bits) {
ipseclog((LOG_ERR,
"ah_common_mature: invalid key length %d for %s.\n",
sav->key_auth->sadb_key_bits, algo->name));
return 1;
}
return 0;
}
static int
ah_none_mature(struct secasvar *sav)
{
if (sav->sah->saidx.proto == IPPROTO_AH) {
ipseclog((LOG_ERR,
"ah_none_mature: protocol and algorithm mismatch.\n"));
return 1;
}
return 0;
}
static int
ah_none_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
state->foo = NULL;
return 0;
}
static void
ah_none_loop(struct ah_algorithm_state *state,
u_int8_t *addr, size_t len)
{
}
static void
ah_none_result(struct ah_algorithm_state *state,
u_int8_t *addr, size_t l)
{
}
static int
ah_keyed_md5_mature(struct secasvar *sav)
{
/* anything is okay */
return 0;
}
static int
ah_keyed_md5_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
size_t padlen;
size_t keybitlen;
u_int8_t buf[32];
if (!state)
panic("ah_keyed_md5_init: what?");
state->sav = sav;
state->foo = (void *)malloc(sizeof(MD5_CTX), M_TEMP, M_NOWAIT);
if (state->foo == NULL)
return ENOBUFS;
MD5Init((MD5_CTX *)state->foo);
if (state->sav) {
MD5Update((MD5_CTX *)state->foo,
(u_int8_t *)_KEYBUF(state->sav->key_auth),
(u_int)_KEYLEN(state->sav->key_auth));
/*
* Pad after the key.
* We cannot simply use md5_pad() since the function
* won't update the total length.
*/
if (_KEYLEN(state->sav->key_auth) < 56)
padlen = 64 - 8 - _KEYLEN(state->sav->key_auth);
else
padlen = 64 + 64 - 8 - _KEYLEN(state->sav->key_auth);
keybitlen = _KEYLEN(state->sav->key_auth);
keybitlen *= 8;
buf[0] = 0x80;
MD5Update((MD5_CTX *)state->foo, &buf[0], 1);
padlen--;
bzero(buf, sizeof(buf));
while (sizeof(buf) < padlen) {
MD5Update((MD5_CTX *)state->foo, &buf[0], sizeof(buf));
padlen -= sizeof(buf);
}
if (padlen) {
MD5Update((MD5_CTX *)state->foo, &buf[0], padlen);
}
buf[0] = (keybitlen >> 0) & 0xff;
buf[1] = (keybitlen >> 8) & 0xff;
buf[2] = (keybitlen >> 16) & 0xff;
buf[3] = (keybitlen >> 24) & 0xff;
MD5Update((MD5_CTX *)state->foo, buf, 8);
}
return 0;
}
static void
ah_keyed_md5_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
if (!state)
panic("ah_keyed_md5_loop: what?");
MD5Update((MD5_CTX *)state->foo, addr, len);
}
static void
ah_keyed_md5_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[MD5_RESULTLEN];
if (!state)
panic("ah_keyed_md5_result: what?");
if (state->sav) {
MD5Update((MD5_CTX *)state->foo,
(u_int8_t *)_KEYBUF(state->sav->key_auth),
(u_int)_KEYLEN(state->sav->key_auth));
}
MD5Final(digest, (MD5_CTX *)state->foo);
free(state->foo, M_TEMP);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
}
static int
ah_keyed_sha1_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
SHA1_CTX *ctxt;
size_t padlen;
size_t keybitlen;
u_int8_t buf[32];
if (!state)
panic("ah_keyed_sha1_init: what?");
state->sav = sav;
state->foo = (void *)malloc(sizeof(SHA1_CTX), M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
ctxt = (SHA1_CTX *)state->foo;
SHA1Init(ctxt);
if (state->sav) {
SHA1Update(ctxt, (u_int8_t *)_KEYBUF(state->sav->key_auth),
(u_int)_KEYLEN(state->sav->key_auth));
/*
* Pad after the key.
*/
if (_KEYLEN(state->sav->key_auth) < 56)
padlen = 64 - 8 - _KEYLEN(state->sav->key_auth);
else
padlen = 64 + 64 - 8 - _KEYLEN(state->sav->key_auth);
keybitlen = _KEYLEN(state->sav->key_auth);
keybitlen *= 8;
buf[0] = 0x80;
SHA1Update(ctxt, &buf[0], 1);
padlen--;
bzero(buf, sizeof(buf));
while (sizeof(buf) < padlen) {
SHA1Update(ctxt, &buf[0], sizeof(buf));
padlen -= sizeof(buf);
}
if (padlen) {
SHA1Update(ctxt, &buf[0], padlen);
}
buf[0] = (keybitlen >> 0) & 0xff;
buf[1] = (keybitlen >> 8) & 0xff;
buf[2] = (keybitlen >> 16) & 0xff;
buf[3] = (keybitlen >> 24) & 0xff;
SHA1Update(ctxt, buf, 8);
}
return 0;
}
static void
ah_keyed_sha1_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
SHA1_CTX *ctxt;
if (!state || !state->foo)
panic("ah_keyed_sha1_loop: what?");
ctxt = (SHA1_CTX *)state->foo;
SHA1Update(ctxt, (u_int8_t *)addr, (size_t)len);
}
static void
ah_keyed_sha1_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[SHA1_RESULTLEN]; /* SHA-1 generates 160 bits */
SHA1_CTX *ctxt;
if (!state || !state->foo)
panic("ah_keyed_sha1_result: what?");
ctxt = (SHA1_CTX *)state->foo;
if (state->sav) {
SHA1Update(ctxt, (u_int8_t *)_KEYBUF(state->sav->key_auth),
(u_int)_KEYLEN(state->sav->key_auth));
}
SHA1Final((u_int8_t *)digest, ctxt);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
free(state->foo, M_TEMP);
}
static int
ah_hmac_md5_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
u_char *ipad;
u_char *opad;
u_char tk[MD5_RESULTLEN];
u_char *key;
size_t keylen;
size_t i;
MD5_CTX *ctxt;
if (!state)
panic("ah_hmac_md5_init: what?");
state->sav = sav;
state->foo = (void *)malloc(64 + 64 + sizeof(MD5_CTX), M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (MD5_CTX *)(opad + 64);
/* compress the key if necessery */
if (64 < _KEYLEN(state->sav->key_auth)) {
MD5Init(ctxt);
MD5Update(ctxt, _KEYBUF(state->sav->key_auth),
_KEYLEN(state->sav->key_auth));
MD5Final(&tk[0], ctxt);
key = &tk[0];
keylen = 16;
} else {
key = _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
bzero(ipad, 64);
bzero(opad, 64);
bcopy(key, ipad, keylen);
bcopy(key, opad, keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
MD5Init(ctxt);
MD5Update(ctxt, ipad, 64);
return 0;
}
static void
ah_hmac_md5_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
MD5_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_md5_loop: what?");
ctxt = (MD5_CTX *)(((u_int8_t *)state->foo) + 128);
MD5Update(ctxt, addr, len);
}
static void
ah_hmac_md5_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[MD5_RESULTLEN];
u_char *ipad;
u_char *opad;
MD5_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_md5_result: what?");
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (MD5_CTX *)(opad + 64);
MD5Final(digest, ctxt);
MD5Init(ctxt);
MD5Update(ctxt, opad, 64);
MD5Update(ctxt, digest, sizeof(digest));
MD5Final(digest, ctxt);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
free(state->foo, M_TEMP);
}
static int
ah_hmac_sha1_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
u_char *ipad;
u_char *opad;
SHA1_CTX *ctxt;
u_char tk[SHA1_RESULTLEN]; /* SHA-1 generates 160 bits */
u_char *key;
size_t keylen;
size_t i;
if (!state)
panic("ah_hmac_sha1_init: what?");
state->sav = sav;
state->foo = (void *)malloc(64 + 64 + sizeof(SHA1_CTX),
M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA1_CTX *)(opad + 64);
/* compress the key if necessery */
if (64 < _KEYLEN(state->sav->key_auth)) {
SHA1Init(ctxt);
SHA1Update(ctxt, _KEYBUF(state->sav->key_auth),
_KEYLEN(state->sav->key_auth));
SHA1Final(&tk[0], ctxt);
key = &tk[0];
keylen = SHA1_RESULTLEN;
} else {
key = _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
bzero(ipad, 64);
bzero(opad, 64);
bcopy(key, ipad, keylen);
bcopy(key, opad, keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
SHA1Init(ctxt);
SHA1Update(ctxt, ipad, 64);
return 0;
}
static void
ah_hmac_sha1_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
SHA1_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha1_loop: what?");
ctxt = (SHA1_CTX *)(((u_char *)state->foo) + 128);
SHA1Update(ctxt, (u_int8_t *)addr, (size_t)len);
}
static void
ah_hmac_sha1_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[SHA1_RESULTLEN]; /* SHA-1 generates 160 bits */
u_char *ipad;
u_char *opad;
SHA1_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha1_result: what?");
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA1_CTX *)(opad + 64);
SHA1Final((u_int8_t *)digest, ctxt);
SHA1Init(ctxt);
SHA1Update(ctxt, opad, 64);
SHA1Update(ctxt, (u_int8_t *)digest, sizeof(digest));
SHA1Final((u_int8_t *)digest, ctxt);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
free(state->foo, M_TEMP);
}
static int
ah_hmac_sha2_256_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
u_char *ipad;
u_char *opad;
SHA256_CTX *ctxt;
u_char tk[SHA256_DIGEST_LENGTH];
u_char *key;
size_t keylen;
size_t i;
if (!state)
panic("ah_hmac_sha2_256_init: what?");
state->sav = sav;
state->foo = (void *)malloc(64 + 64 + sizeof(SHA256_CTX),
M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA256_CTX *)(opad + 64);
/* compress the key if necessery */
if (64 < _KEYLEN(state->sav->key_auth)) {
bzero(tk, sizeof(tk));
SHA256_Init(ctxt);
SHA256_Update(ctxt, _KEYBUF(state->sav->key_auth),
_KEYLEN(state->sav->key_auth));
SHA256_Final(&tk[0], ctxt);
key = &tk[0];
keylen = sizeof(tk) < 64 ? sizeof(tk) : 64;
} else {
key = _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
bzero(ipad, 64);
bzero(opad, 64);
bcopy(key, ipad, keylen);
bcopy(key, opad, keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
SHA256_Init(ctxt);
SHA256_Update(ctxt, ipad, 64);
return 0;
}
static void
ah_hmac_sha2_256_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
SHA256_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha2_256_loop: what?");
ctxt = (SHA256_CTX *)(((u_char *)state->foo) + 128);
SHA256_Update(ctxt, (void *)addr, (size_t)len);
}
static void
ah_hmac_sha2_256_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[SHA256_DIGEST_LENGTH];
u_char *ipad;
u_char *opad;
SHA256_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha2_256_result: what?");
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA256_CTX *)(opad + 64);
SHA256_Final((void *)digest, ctxt);
SHA256_Init(ctxt);
SHA256_Update(ctxt, opad, 64);
SHA256_Update(ctxt, (void *)digest, sizeof(digest));
SHA256_Final((void *)digest, ctxt);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
free(state->foo, M_TEMP);
}
static int
ah_hmac_sha2_384_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
u_char *ipad;
u_char *opad;
SHA384_CTX *ctxt;
u_char tk[SHA384_DIGEST_LENGTH];
u_char *key;
size_t keylen;
size_t i;
if (!state)
panic("ah_hmac_sha2_384_init: what?");
state->sav = sav;
state->foo = (void *)malloc(64 + 64 + sizeof(SHA384_CTX),
M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
bzero(state->foo, 64 + 64 + sizeof(SHA384_CTX));
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA384_CTX *)(opad + 64);
/* compress the key if necessery */
if (64 < _KEYLEN(state->sav->key_auth)) {
bzero(tk, sizeof(tk));
SHA384_Init(ctxt);
SHA384_Update(ctxt, _KEYBUF(state->sav->key_auth),
_KEYLEN(state->sav->key_auth));
SHA384_Final(&tk[0], ctxt);
key = &tk[0];
keylen = sizeof(tk) < 64 ? sizeof(tk) : 64;
} else {
key = _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
bzero(ipad, 64);
bzero(opad, 64);
bcopy(key, ipad, keylen);
bcopy(key, opad, keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
SHA384_Init(ctxt);
SHA384_Update(ctxt, ipad, 64);
return 0;
}
static void
ah_hmac_sha2_384_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
SHA384_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha2_384_loop: what?");
ctxt = (SHA384_CTX *)(((u_char *)state->foo) + 128);
SHA384_Update(ctxt, (void *)addr, (size_t)len);
}
static void
ah_hmac_sha2_384_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[SHA384_DIGEST_LENGTH];
u_char *ipad;
u_char *opad;
SHA384_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha2_384_result: what?");
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA384_CTX *)(opad + 64);
SHA384_Final((void *)digest, ctxt);
SHA384_Init(ctxt);
SHA384_Update(ctxt, opad, 64);
SHA384_Update(ctxt, (void *)digest, sizeof(digest));
SHA384_Final((void *)digest, ctxt);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
free(state->foo, M_TEMP);
}
static int
ah_hmac_sha2_512_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
u_char *ipad;
u_char *opad;
SHA512_CTX *ctxt;
u_char tk[SHA512_DIGEST_LENGTH];
u_char *key;
size_t keylen;
size_t i;
if (!state)
panic("ah_hmac_sha2_512_init: what?");
state->sav = sav;
state->foo = (void *)malloc(64 + 64 + sizeof(SHA512_CTX),
M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
bzero(state->foo, 64 + 64 + sizeof(SHA512_CTX));
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA512_CTX *)(opad + 64);
/* compress the key if necessery */
if (64 < _KEYLEN(state->sav->key_auth)) {
bzero(tk, sizeof(tk));
SHA512_Init(ctxt);
SHA512_Update(ctxt, _KEYBUF(state->sav->key_auth),
_KEYLEN(state->sav->key_auth));
SHA512_Final(&tk[0], ctxt);
key = &tk[0];
keylen = sizeof(tk) < 64 ? sizeof(tk) : 64;
} else {
key = _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
bzero(ipad, 64);
bzero(opad, 64);
bcopy(key, ipad, keylen);
bcopy(key, opad, keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
SHA512_Init(ctxt);
SHA512_Update(ctxt, ipad, 64);
return 0;
}
static void
ah_hmac_sha2_512_loop(struct ah_algorithm_state *state, u_int8_t *addr,
size_t len)
{
SHA512_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha2_512_loop: what?");
ctxt = (SHA512_CTX *)(((u_char *)state->foo) + 128);
SHA512_Update(ctxt, (void *)addr, (size_t)len);
}
static void
ah_hmac_sha2_512_result(struct ah_algorithm_state *state, u_int8_t *addr,
size_t l)
{
u_char digest[SHA512_DIGEST_LENGTH];
u_char *ipad;
u_char *opad;
SHA512_CTX *ctxt;
if (!state || !state->foo)
panic("ah_hmac_sha2_512_result: what?");
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (SHA512_CTX *)(opad + 64);
SHA512_Final((void *)digest, ctxt);
SHA512_Init(ctxt);
SHA512_Update(ctxt, opad, 64);
SHA512_Update(ctxt, (void *)digest, sizeof(digest));
SHA512_Final((void *)digest, ctxt);
bcopy(digest, addr, sizeof(digest) > l ? l : sizeof(digest));
free(state->foo, M_TEMP);
}
static int
ah_hmac_ripemd160_init(struct ah_algorithm_state *state, struct secasvar *sav)
{
u_char *ipad;
u_char *opad;
RMD160_CTX *ctxt;
u_char tk[RIPEMD160_RESULTLEN];
u_char *key;
size_t keylen;
size_t i;
if (!state)
panic("ah_hmac_ripemd160_init: what?");
state->sav = sav;
state->foo = (void *)malloc(64 + 64 + sizeof(RMD160_CTX),
M_TEMP, M_NOWAIT);
if (!state->foo)
return ENOBUFS;
bzero(state->foo, 64 + 64 + sizeof(RMD160_CTX));
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
ctxt = (RMD160_CTX *)(opad + 64);
/* compress the key if necessery */
if (64 < _KEYLEN(state->sav->key_auth)) {
bzero(tk, sizeof(tk));
RMD160Init(ctxt);
RMD160Update(ctxt, _KEYBUF(state->sav->key_auth),
_KEYLEN(state->sav->key_auth));
RMD160Final(&tk[0], ctxt);
key = &tk[0];
keylen = sizeof(tk) < 64 ? sizeof(tk) : 64;
} else {
key = _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
bzero(ipad, 64);
bzero(opad, 64);
bcopy(key, ipad, keylen);
bcopy(key, opad, keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
RMD160Init(ctxt);
RMD160Update(ctxt, ipad, 64);
return 0;
}
static void
ah_hmac_ripemd160_loop(struct ah_algorithm_state *state, u_int8_t *addr,