+/*
+ * Copyright (c) 2008 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/* $FreeBSD: src/sys/netinet6/ah_core.c,v 1.2.2.4 2001/07/03 11:01:49 ume Exp $ */
+/* $KAME: ah_core.c,v 1.44 2001/03/12 11:24:39 itojun Exp $ */
+
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
/*
* RFC1826/2402 authentication header.
*/
-#define _IP_VHL
-#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
-#include "opt_inet.h"
-#if __NetBSD__ /*XXX*/
-#include "opt_ipsec.h"
-#endif
-#endif
-/* Some of operating systems have standard crypto checksum library */
-#if __NetBSD__
-#define HAVE_MD5
-#define HAVE_SHA1
-#endif
-#if defined(__FreeBSD__) || defined(__APPLE__)
-#define HAVE_MD5 1
-#endif
+/* TODO: have shared routines for hmac-* algorithms */
#include <sys/param.h>
#include <sys/systm.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>
#endif
#include <netinet6/ipsec.h>
+#if INET6
+#include <netinet6/ipsec6.h>
+#endif
#include <netinet6/ah.h>
+#if INET6
+#include <netinet6/ah6.h>
+#endif
#if IPSEC_ESP
#include <netinet6/esp.h>
+#if INET6
+#include <netinet6/esp6.h>
+#endif
#endif
#include <net/pfkeyv2.h>
#include <netkey/keydb.h>
-#if HAVE_MD5
-#include <sys/md5.h>
-#else
-#include <crypto/md5.h>
-#endif
-#if HAVE_SHA1
-#include <sys/sha1.h>
-#define SHA1_RESULTLEN 20
-#else
-#include <crypto/sha1.h>
-#endif
+#include <libkern/crypto/md5.h>
+#include <libkern/crypto/sha1.h>
+#include <crypto/sha2/sha2.h>
#include <net/net_osdep.h>
#define HMACSIZE 16
-static int ah_sumsiz_1216 __P((struct secasvar *));
-static int ah_sumsiz_zero __P((struct secasvar *));
-static int ah_none_mature __P((struct secasvar *));
-static void ah_none_init __P((struct ah_algorithm_state *,
- struct secasvar *));
-static void ah_none_loop __P((struct ah_algorithm_state *, caddr_t, size_t));
-static void ah_none_result __P((struct ah_algorithm_state *, caddr_t));
-static int ah_keyed_md5_mature __P((struct secasvar *));
-static void ah_keyed_md5_init __P((struct ah_algorithm_state *,
- struct secasvar *));
-static void ah_keyed_md5_loop __P((struct ah_algorithm_state *, caddr_t,
- size_t));
-static void ah_keyed_md5_result __P((struct ah_algorithm_state *, caddr_t));
-static int ah_keyed_sha1_mature __P((struct secasvar *));
-static void ah_keyed_sha1_init __P((struct ah_algorithm_state *,
- struct secasvar *));
-static void ah_keyed_sha1_loop __P((struct ah_algorithm_state *, caddr_t,
- size_t));
-static void ah_keyed_sha1_result __P((struct ah_algorithm_state *, caddr_t));
-static int ah_hmac_md5_mature __P((struct secasvar *));
-static void ah_hmac_md5_init __P((struct ah_algorithm_state *,
- struct secasvar *));
-static void ah_hmac_md5_loop __P((struct ah_algorithm_state *, caddr_t,
- size_t));
-static void ah_hmac_md5_result __P((struct ah_algorithm_state *, caddr_t));
-static int ah_hmac_sha1_mature __P((struct secasvar *));
-static void ah_hmac_sha1_init __P((struct ah_algorithm_state *,
- struct secasvar *));
-static void ah_hmac_sha1_loop __P((struct ah_algorithm_state *, caddr_t,
- size_t));
-static void ah_hmac_sha1_result __P((struct ah_algorithm_state *, caddr_t));
-
-static void ah_update_mbuf __P((struct mbuf *, int, int, struct ah_algorithm *,
- struct ah_algorithm_state *));
-
-/* checksum algorithms */
-/* NOTE: The order depends on SADB_AALG_x in net/pfkeyv2.h */
-struct ah_algorithm ah_algorithms[] = {
- { 0, 0, 0, 0, 0, 0, },
- { ah_sumsiz_1216, ah_hmac_md5_mature, 128, 128,
- ah_hmac_md5_init, ah_hmac_md5_loop, ah_hmac_md5_result, },
- { ah_sumsiz_1216, ah_hmac_sha1_mature, 160, 160,
- ah_hmac_sha1_init, ah_hmac_sha1_loop, ah_hmac_sha1_result, },
- { ah_sumsiz_1216, ah_keyed_md5_mature, 128, 128,
- ah_keyed_md5_init, ah_keyed_md5_loop, ah_keyed_md5_result, },
- { ah_sumsiz_1216, ah_keyed_sha1_mature, 160, 160,
- ah_keyed_sha1_init, ah_keyed_sha1_loop, ah_keyed_sha1_result, },
- { ah_sumsiz_zero, ah_none_mature, 0, 2048,
- ah_none_init, ah_none_loop, ah_none_result, },
-};
+static int ah_sumsiz_1216(struct secasvar *);
+static int ah_sumsiz_zero(struct secasvar *);
+static int ah_none_mature(struct secasvar *);
+static int ah_none_init(struct ah_algorithm_state *, struct secasvar *);
+static void ah_none_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_none_result(struct ah_algorithm_state *, caddr_t, size_t);
+static int ah_keyed_md5_mature(struct secasvar *);
+static int ah_keyed_md5_init(struct ah_algorithm_state *, struct secasvar *);
+static void ah_keyed_md5_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_keyed_md5_result(struct ah_algorithm_state *, caddr_t, size_t);
+static int ah_keyed_sha1_mature(struct secasvar *);
+static int ah_keyed_sha1_init(struct ah_algorithm_state *, struct secasvar *);
+static void ah_keyed_sha1_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_keyed_sha1_result(struct ah_algorithm_state *, caddr_t, size_t);
+static int ah_hmac_md5_mature(struct secasvar *);
+static int ah_hmac_md5_init(struct ah_algorithm_state *, struct secasvar *);
+static void ah_hmac_md5_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_hmac_md5_result(struct ah_algorithm_state *, caddr_t, size_t);
+static int ah_hmac_sha1_mature(struct secasvar *);
+static int ah_hmac_sha1_init(struct ah_algorithm_state *, struct secasvar *);
+static void ah_hmac_sha1_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_hmac_sha1_result(struct ah_algorithm_state *, caddr_t, size_t);
+#if ALLCRYPTO
+static int ah_sumsiz_sha2_256(struct secasvar *);
+static int ah_hmac_sha2_256_mature(struct secasvar *);
+static int ah_hmac_sha2_256_init(struct ah_algorithm_state *,
+ struct secasvar *);
+static void ah_hmac_sha2_256_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_hmac_sha2_256_result(struct ah_algorithm_state *, caddr_t, size_t);
+static int ah_sumsiz_sha2_384(struct secasvar *);
+static int ah_hmac_sha2_384_mature(struct secasvar *);
+static int ah_hmac_sha2_384_init(struct ah_algorithm_state *,
+ struct secasvar *);
+static void ah_hmac_sha2_384_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_hmac_sha2_384_result(struct ah_algorithm_state *, caddr_t, size_t);
+static int ah_sumsiz_sha2_512(struct secasvar *);
+static int ah_hmac_sha2_512_mature(struct secasvar *);
+static int ah_hmac_sha2_512_init(struct ah_algorithm_state *,
+ struct secasvar *);
+static void ah_hmac_sha2_512_loop(struct ah_algorithm_state *, caddr_t, size_t);
+static void ah_hmac_sha2_512_result(struct ah_algorithm_state *, caddr_t, size_t);
+#endif /* ALLCRYPTO */
+
+static void ah_update_mbuf(struct mbuf *, int, int,
+ const struct ah_algorithm *, struct ah_algorithm_state *);
+
+const struct ah_algorithm *
+ah_algorithm_lookup(idx)
+ int idx;
+{
+ /* checksum algorithms */
+ static struct ah_algorithm hmac_md5 =
+ { ah_sumsiz_1216, ah_hmac_md5_mature, 128, 128, "hmac-md5",
+ ah_hmac_md5_init, ah_hmac_md5_loop,
+ ah_hmac_md5_result, };
+ static struct ah_algorithm keyed_md5 =
+ { ah_sumsiz_1216, ah_keyed_md5_mature, 128, 128, "keyed-md5",
+ ah_keyed_md5_init, ah_keyed_md5_loop,
+ ah_keyed_md5_result, };
+ static struct ah_algorithm hmac_sha1 =
+ { ah_sumsiz_1216, ah_hmac_sha1_mature, 160, 160, "hmac-sha1",
+ ah_hmac_sha1_init, ah_hmac_sha1_loop,
+ ah_hmac_sha1_result, };
+ static struct ah_algorithm keyed_sha1 =
+ { ah_sumsiz_1216, ah_keyed_sha1_mature, 160, 160, "keyed-sha1",
+ ah_keyed_sha1_init, ah_keyed_sha1_loop,
+ ah_keyed_sha1_result, };
+ static struct ah_algorithm ah_none =
+ { ah_sumsiz_zero, ah_none_mature, 0, 2048, "none",
+ ah_none_init, ah_none_loop, ah_none_result, };
+#if ALLCRYPTO
+ static struct ah_algorithm hmac_sha2_256 =
+ { ah_sumsiz_sha2_256, ah_hmac_sha2_256_mature, 256, 256,
+ "hmac-sha2-256",
+ ah_hmac_sha2_256_init, ah_hmac_sha2_256_loop,
+ ah_hmac_sha2_256_result, };
+ static struct ah_algorithm hmac_sha2_384 =
+ { ah_sumsiz_sha2_384, ah_hmac_sha2_384_mature, 384, 384,
+ "hmac-sha2-384",
+ ah_hmac_sha2_384_init, ah_hmac_sha2_384_loop,
+ ah_hmac_sha2_384_result, };
+ static struct ah_algorithm hmac_sha2_512 =
+ { ah_sumsiz_sha2_512, ah_hmac_sha2_512_mature, 512, 512,
+ "hmac-sha2-512",
+ ah_hmac_sha2_512_init, ah_hmac_sha2_512_loop,
+ ah_hmac_sha2_512_result, };
+#endif /* ALLCRYPTO */
+
+ switch (idx) {
+ case SADB_AALG_MD5HMAC:
+ return &hmac_md5;
+ case SADB_AALG_SHA1HMAC:
+ return &hmac_sha1;
+ case SADB_X_AALG_MD5:
+ return &keyed_md5;
+ case SADB_X_AALG_SHA:
+ return &keyed_sha1;
+ case SADB_X_AALG_NULL:
+ return &ah_none;
+#if ALLCRYPTO
+ case SADB_X_AALG_SHA2_256:
+ return &hmac_sha2_256;
+ case SADB_X_AALG_SHA2_384:
+ return &hmac_sha2_384;
+ case SADB_X_AALG_SHA2_512:
+ return &hmac_sha2_512;
+#endif /* ALLCRYPTO */
+ default:
+ return NULL;
+ }
+}
+
static int
ah_sumsiz_1216(sav)
return 0;
}
-static void
-ah_none_init(state, sav)
- struct ah_algorithm_state *state;
- struct secasvar *sav;
+static int
+ah_none_init(
+ struct ah_algorithm_state *state,
+ __unused struct secasvar *sav)
{
state->foo = NULL;
+ return 0;
}
static void
-ah_none_loop(state, addr, len)
- struct ah_algorithm_state *state;
- caddr_t addr;
- size_t len;
+ah_none_loop(
+ __unused struct ah_algorithm_state *state,
+ __unused caddr_t addr,
+ __unused size_t len)
{
}
static void
-ah_none_result(state, addr)
- struct ah_algorithm_state *state;
- caddr_t addr;
+ah_none_result(
+ __unused struct ah_algorithm_state *state,
+ __unused caddr_t addr,
+ __unused size_t l)
{
}
static int
-ah_keyed_md5_mature(sav)
- struct secasvar *sav;
+ah_keyed_md5_mature(
+ __unused struct secasvar *sav)
{
/* anything is okay */
return 0;
}
-static void
+static int
ah_keyed_md5_init(state, sav)
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_WAITOK);
+ state->foo = (void *)_MALLOC(sizeof(MD5_CTX), M_TEMP, M_NOWAIT);
if (state->foo == NULL)
- panic("ah_keyed_md5_init: what?");
+ 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.
*/
- size_t padlen;
- size_t keybitlen;
- u_int8_t buf[32];
-
if (_KEYLEN(state->sav->key_auth) < 56)
padlen = 64 - 8 - _KEYLEN(state->sav->key_auth);
else
buf[2] = (keybitlen >> 16) & 0xff;
buf[3] = (keybitlen >> 24) & 0xff;
MD5Update((MD5_CTX *)state->foo, buf, 8);
- }
}
+
+ return 0;
}
static void
}
static void
-ah_keyed_md5_result(state, addr)
+ah_keyed_md5_result(state, addr, l)
struct ah_algorithm_state *state;
caddr_t addr;
+ size_t l;
{
u_char digest[16];
(u_int)_KEYLEN(state->sav->key_auth));
}
MD5Final(&digest[0], (MD5_CTX *)state->foo);
- _FREE(state->foo, M_TEMP);
- bcopy(&digest[0], (void *)addr, sizeof(digest));
+ FREE(state->foo, M_TEMP);
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
}
static int
ah_keyed_sha1_mature(sav)
struct secasvar *sav;
{
- struct ah_algorithm *algo;
+ const struct ah_algorithm *algo;
if (!sav->key_auth) {
ipseclog((LOG_ERR, "ah_keyed_sha1_mature: no key is given.\n"));
return 1;
}
- algo = &ah_algorithms[sav->alg_auth];
+
+ algo = ah_algorithm_lookup(sav->alg_auth);
+ if (!algo) {
+ ipseclog((LOG_ERR, "ah_keyed_sha1_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,
return 0;
}
-static void
+static int
ah_keyed_sha1_init(state, sav)
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_WAITOK);
+ state->foo = (void *)_MALLOC(sizeof(SHA1_CTX), M_TEMP, M_NOWAIT);
if (!state->foo)
- panic("ah_keyed_sha1_init: what?");
+ return ENOBUFS;
ctxt = (SHA1_CTX *)state->foo;
SHA1Init(ctxt);
SHA1Update(ctxt, (u_int8_t *)_KEYBUF(state->sav->key_auth),
(u_int)_KEYLEN(state->sav->key_auth));
- {
/*
* Pad after the key.
*/
- size_t padlen;
- size_t keybitlen;
- u_int8_t buf[32];
-
if (_KEYLEN(state->sav->key_auth) < 56)
padlen = 64 - 8 - _KEYLEN(state->sav->key_auth);
else
buf[2] = (keybitlen >> 16) & 0xff;
buf[3] = (keybitlen >> 24) & 0xff;
SHA1Update(ctxt, buf, 8);
- }
}
+
+ return 0;
}
static void
}
static void
-ah_keyed_sha1_result(state, addr)
+ah_keyed_sha1_result(state, addr, l)
struct ah_algorithm_state *state;
caddr_t addr;
+ size_t l;
{
u_char digest[SHA1_RESULTLEN]; /* SHA-1 generates 160 bits */
SHA1_CTX *ctxt;
(u_int)_KEYLEN(state->sav->key_auth));
}
SHA1Final((caddr_t)&digest[0], ctxt);
- bcopy(&digest[0], (void *)addr, HMACSIZE);
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
- _FREE(state->foo, M_TEMP);
+ FREE(state->foo, M_TEMP);
}
static int
ah_hmac_md5_mature(sav)
struct secasvar *sav;
{
- struct ah_algorithm *algo;
+ const struct ah_algorithm *algo;
if (!sav->key_auth) {
ipseclog((LOG_ERR, "ah_hmac_md5_mature: no key is given.\n"));
return 1;
}
- algo = &ah_algorithms[sav->alg_auth];
+
+ algo = ah_algorithm_lookup(sav->alg_auth);
+ if (!algo) {
+ ipseclog((LOG_ERR, "ah_hmac_md5_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,
return 0;
}
-static void
+static int
ah_hmac_md5_init(state, sav)
struct ah_algorithm_state *state;
struct secasvar *sav;
panic("ah_hmac_md5_init: what?");
state->sav = sav;
- state->foo = (void *)_MALLOC(64 + 64 + sizeof(MD5_CTX), M_TEMP, M_WAITOK);
+ state->foo = (void *)_MALLOC(64 + 64 + sizeof(MD5_CTX), M_TEMP, M_NOWAIT);
if (!state->foo)
- panic("ah_hmac_md5_init: what?");
+ return ENOBUFS;
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
key = &tk[0];
keylen = 16;
} else {
- key = _KEYBUF(state->sav->key_auth);
+ key = (u_char *) _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
MD5Init(ctxt);
MD5Update(ctxt, ipad, 64);
+
+ return 0;
}
static void
}
static void
-ah_hmac_md5_result(state, addr)
+ah_hmac_md5_result(state, addr, l)
struct ah_algorithm_state *state;
caddr_t addr;
+ size_t l;
{
u_char digest[16];
u_char *ipad;
MD5Update(ctxt, &digest[0], sizeof(digest));
MD5Final(&digest[0], ctxt);
- bcopy(&digest[0], (void *)addr, HMACSIZE);
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
- _FREE(state->foo, M_TEMP);
+ FREE(state->foo, M_TEMP);
}
static int
ah_hmac_sha1_mature(sav)
struct secasvar *sav;
{
- struct ah_algorithm *algo;
+ const struct ah_algorithm *algo;
if (!sav->key_auth) {
ipseclog((LOG_ERR, "ah_hmac_sha1_mature: no key is given.\n"));
return 1;
}
- algo = &ah_algorithms[sav->alg_auth];
+
+ algo = ah_algorithm_lookup(sav->alg_auth);
+ if (!algo) {
+ ipseclog((LOG_ERR, "ah_hmac_sha1_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,
return 0;
}
-static void
+static int
ah_hmac_sha1_init(state, sav)
struct ah_algorithm_state *state;
struct secasvar *sav;
state->sav = sav;
state->foo = (void *)_MALLOC(64 + 64 + sizeof(SHA1_CTX),
- M_TEMP, M_WAITOK);
+ M_TEMP, M_NOWAIT);
if (!state->foo)
- panic("ah_hmac_sha1_init: what?");
+ return ENOBUFS;
ipad = (u_char *)state->foo;
opad = (u_char *)(ipad + 64);
key = &tk[0];
keylen = SHA1_RESULTLEN;
} else {
- key = _KEYBUF(state->sav->key_auth);
+ key = (u_char *) _KEYBUF(state->sav->key_auth);
keylen = _KEYLEN(state->sav->key_auth);
}
SHA1Init(ctxt);
SHA1Update(ctxt, ipad, 64);
+
+ return 0;
}
static void
}
static void
-ah_hmac_sha1_result(state, addr)
+ah_hmac_sha1_result(state, addr, l)
struct ah_algorithm_state *state;
caddr_t addr;
+ size_t l;
{
u_char digest[SHA1_RESULTLEN]; /* SHA-1 generates 160 bits */
u_char *ipad;
SHA1Update(ctxt, (caddr_t)&digest[0], sizeof(digest));
SHA1Final((caddr_t)&digest[0], ctxt);
- bcopy(&digest[0], (void *)addr, HMACSIZE);
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
- _FREE(state->foo, M_TEMP);
+ FREE(state->foo, M_TEMP);
}
+#if ALLCRYPTO
+static int
+ah_sumsiz_sha2_256(sav)
+ struct secasvar *sav;
+{
+ if (!sav)
+ return -1;
+ // return half the output size (in bytes), as per rfc 4868
+ return 16; // 256/(8*2)
+}
+
+static int
+ah_hmac_sha2_256_mature(sav)
+ struct secasvar *sav;
+{
+ const struct ah_algorithm *algo;
+
+ if (!sav->key_auth) {
+ ipseclog((LOG_ERR,
+ "ah_hmac_sha2_256_mature: no key is given.\n"));
+ return 1;
+ }
+
+ algo = ah_algorithm_lookup(sav->alg_auth);
+ if (!algo) {
+ ipseclog((LOG_ERR,
+ "ah_hmac_sha2_256_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_hmac_sha2_256_mature: invalid key length %d.\n",
+ sav->key_auth->sadb_key_bits));
+ return 1;
+ }
+
+ return 0;
+}
+
+static int
+ah_hmac_sha2_256_init(state, sav)
+ 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));
+ bzero(ctxt, sizeof(*ctxt));
+ SHA256_Init(ctxt);
+ SHA256_Update(ctxt, (const u_int8_t *) _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 = (u_char *) _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;
+ }
+
+ bzero(ctxt, sizeof(*ctxt));
+ SHA256_Init(ctxt);
+ SHA256_Update(ctxt, ipad, 64);
+
+ return 0;
+}
+
+static void
+ah_hmac_sha2_256_loop(state, addr, len)
+ struct ah_algorithm_state *state;
+ caddr_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, (const u_int8_t *)addr, (size_t)len);
+}
+
+static void
+ah_hmac_sha2_256_result(state, addr, l)
+ struct ah_algorithm_state *state;
+ caddr_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((u_int8_t *)digest, ctxt);
+
+ SHA256_Init(ctxt);
+ SHA256_Update(ctxt, opad, 64);
+ SHA256_Update(ctxt, (const u_int8_t *)digest, sizeof(digest));
+ SHA256_Final((u_int8_t *)digest, ctxt);
+
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
+
+ FREE(state->foo, M_TEMP);
+}
+
+static int
+ah_sumsiz_sha2_384(sav)
+ struct secasvar *sav;
+{
+ if (!sav)
+ return -1;
+ // return half the output size (in bytes), as per rfc 4868
+ return 24; // 384/(8*2)
+}
+
+static int
+ah_hmac_sha2_384_mature(sav)
+ struct secasvar *sav;
+{
+ const struct ah_algorithm *algo;
+
+ if (!sav->key_auth) {
+ ipseclog((LOG_ERR,
+ "ah_hmac_sha2_384_mature: no key is given.\n"));
+ return 1;
+ }
+
+ algo = ah_algorithm_lookup(sav->alg_auth);
+ if (!algo) {
+ ipseclog((LOG_ERR,
+ "ah_hmac_sha2_384_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_hmac_sha2_384_mature: invalid key length %d.\n",
+ sav->key_auth->sadb_key_bits));
+ return 1;
+ }
+
+ return 0;
+}
+
+static int
+ah_hmac_sha2_384_init(state, sav)
+ 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(128 + 128 + sizeof(SHA384_CTX),
+ M_TEMP, M_NOWAIT);
+ if (!state->foo)
+ return ENOBUFS;
+ bzero(state->foo, 128 + 128 + sizeof(SHA384_CTX));
+
+ ipad = (u_char *)state->foo;
+ opad = (u_char *)(ipad + 128);
+ ctxt = (SHA384_CTX *)(opad + 128);
+
+ /* compress the key if necessery */
+ if (128 < _KEYLEN(state->sav->key_auth)) {
+ bzero(tk, sizeof(tk));
+ bzero(ctxt, sizeof(*ctxt));
+ SHA384_Init(ctxt);
+ SHA384_Update(ctxt, (const u_int8_t *) _KEYBUF(state->sav->key_auth),
+ _KEYLEN(state->sav->key_auth));
+ SHA384_Final(&tk[0], ctxt);
+ key = &tk[0];
+ keylen = sizeof(tk) < 128 ? sizeof(tk) : 128;
+ } else {
+ key = (u_char *) _KEYBUF(state->sav->key_auth);
+ keylen = _KEYLEN(state->sav->key_auth);
+ }
+
+ bzero(ipad, 128);
+ bzero(opad, 128);
+ bcopy(key, ipad, keylen);
+ bcopy(key, opad, keylen);
+ for (i = 0; i < 128; i++) {
+ ipad[i] ^= 0x36;
+ opad[i] ^= 0x5c;
+ }
+
+ bzero(ctxt, sizeof(*ctxt));
+ SHA384_Init(ctxt);
+ SHA384_Update(ctxt, ipad, 128);
+
+ return 0;
+}
+
+static void
+ah_hmac_sha2_384_loop(state, addr, len)
+ struct ah_algorithm_state *state;
+ caddr_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) + 256);
+ SHA384_Update(ctxt, (const u_int8_t *)addr, (size_t)len);
+}
+
+static void
+ah_hmac_sha2_384_result(state, addr, l)
+ struct ah_algorithm_state *state;
+ caddr_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 + 128);
+ ctxt = (SHA384_CTX *)(opad + 128);
+
+ SHA384_Final((u_int8_t *)digest, ctxt);
+
+ SHA384_Init(ctxt);
+ SHA384_Update(ctxt, opad, 128);
+ SHA384_Update(ctxt, (const u_int8_t *)digest, sizeof(digest));
+ SHA384_Final((u_int8_t *)digest, ctxt);
+
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
+
+ FREE(state->foo, M_TEMP);
+}
+
+static int
+ah_sumsiz_sha2_512(sav)
+ struct secasvar *sav;
+{
+ if (!sav)
+ return -1;
+ // return half the output size (in bytes), as per rfc 4868
+ return 32; // 512/(8*2)
+}
+
+static int
+ah_hmac_sha2_512_mature(sav)
+ struct secasvar *sav;
+{
+ const struct ah_algorithm *algo;
+
+ if (!sav->key_auth) {
+ ipseclog((LOG_ERR,
+ "ah_hmac_sha2_512_mature: no key is given.\n"));
+ return 1;
+ }
+
+ algo = ah_algorithm_lookup(sav->alg_auth);
+ if (!algo) {
+ ipseclog((LOG_ERR,
+ "ah_hmac_sha2_512_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_hmac_sha2_512_mature: invalid key length %d.\n",
+ sav->key_auth->sadb_key_bits));
+ return 1;
+ }
+
+ return 0;
+}
+
+static int
+ah_hmac_sha2_512_init(state, sav)
+ 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(128 + 128 + sizeof(SHA512_CTX),
+ M_TEMP, M_NOWAIT);
+ if (!state->foo)
+ return ENOBUFS;
+ bzero(state->foo, 128 + 128 + sizeof(SHA512_CTX));
+
+ ipad = (u_char *)state->foo;
+ opad = (u_char *)(ipad + 128);
+ ctxt = (SHA512_CTX *)(opad + 128);
+
+ /* compress the key if necessery */
+ if (128 < _KEYLEN(state->sav->key_auth)) {
+ bzero(tk, sizeof(tk));
+ bzero(ctxt, sizeof(*ctxt));
+ SHA512_Init(ctxt);
+ SHA512_Update(ctxt, (const u_int8_t *) _KEYBUF(state->sav->key_auth),
+ _KEYLEN(state->sav->key_auth));
+ SHA512_Final(&tk[0], ctxt);
+ key = &tk[0];
+ keylen = sizeof(tk) < 128 ? sizeof(tk) : 128;
+ } else {
+ key = (u_char *) _KEYBUF(state->sav->key_auth);
+ keylen = _KEYLEN(state->sav->key_auth);
+ }
+
+ bzero(ipad, 128);
+ bzero(opad, 128);
+ bcopy(key, ipad, keylen);
+ bcopy(key, opad, keylen);
+ for (i = 0; i < 128; i++) {
+ ipad[i] ^= 0x36;
+ opad[i] ^= 0x5c;
+ }
+
+ bzero(ctxt, sizeof(*ctxt));
+ SHA512_Init(ctxt);
+ SHA512_Update(ctxt, ipad, 128);
+
+ return 0;
+}
+
+static void
+ah_hmac_sha2_512_loop(state, addr, len)
+ struct ah_algorithm_state *state;
+ caddr_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) + 256);
+ SHA512_Update(ctxt, (const u_int8_t *) addr, (size_t)len);
+}
+
+static void
+ah_hmac_sha2_512_result(state, addr, l)
+ struct ah_algorithm_state *state;
+ caddr_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 + 128);
+ ctxt = (SHA512_CTX *)(opad + 128);
+
+ SHA512_Final((u_int8_t *)digest, ctxt);
+
+ SHA512_Init(ctxt);
+ SHA512_Update(ctxt, opad, 128);
+ SHA512_Update(ctxt, (const u_int8_t *)digest, sizeof(digest));
+ SHA512_Final((u_int8_t *)digest, ctxt);
+
+ bcopy(&digest[0], (void *)addr, sizeof(digest) > l ? l : sizeof(digest));
+
+ FREE(state->foo, M_TEMP);
+}
+#endif /* ALLCRYPTO */
+
/*------------------------------------------------------------*/
/*
struct mbuf *m;
int off;
int len;
- struct ah_algorithm *algo;
+ const struct ah_algorithm *algo;
struct ah_algorithm_state *algos;
{
struct mbuf *n;
}
}
+#if INET
/*
* Go generate the checksum. This function won't modify the mbuf chain
* except AH itself.
* Don't use m_copy(), it will try to share cluster mbuf by using refcnt.
*/
int
-ah4_calccksum(m, ahdat, algo, sav)
+ah4_calccksum(m, ahdat, len, algo, sav)
struct mbuf *m;
caddr_t ahdat;
- struct ah_algorithm *algo;
+ size_t len;
+ const struct ah_algorithm *algo;
struct secasvar *sav;
{
int off;
off = 0;
- (algo->init)(&algos, sav);
+ error = (algo->init)(&algos, sav);
+ if (error)
+ return error;
advancewidth = 0; /*safety*/
size_t hlen;
m_copydata(m, off, sizeof(iphdr), (caddr_t)&iphdr);
-#ifdef _IP_VHL
+#if _IP_VHL
hlen = IP_VHL_HL(iphdr.ip_vhl) << 2;
#else
hlen = iphdr.ip_hl << 2;
p = mtod(n, u_char *);
i = sizeof(struct ip);
while (i < hlen) {
+ if (i + IPOPT_OPTVAL >= hlen) {
+ ipseclog((LOG_ERR, "ah4_calccksum: "
+ "invalid IP option\n"));
+ error = EINVAL;
+ goto fail;
+ }
+ if (p[i + IPOPT_OPTVAL] == IPOPT_EOL ||
+ p[i + IPOPT_OPTVAL] == IPOPT_NOP ||
+ i + IPOPT_OLEN < hlen)
+ ;
+ else {
+ ipseclog((LOG_ERR,
+ "ah4_calccksum: invalid IP option "
+ "(type=%02x)\n",
+ p[i + IPOPT_OPTVAL]));
+ error = EINVAL;
+ goto fail;
+ }
+
skip = 1;
switch (p[i + IPOPT_OPTVAL]) {
case IPOPT_EOL:
case 0x94: /* Router alert */
case 0x95: /* RFC1770 */
l = p[i + IPOPT_OLEN];
+ if (l < 2)
+ goto invalopt;
skip = 0;
break;
default:
l = p[i + IPOPT_OLEN];
+ if (l < 2)
+ goto invalopt;
skip = 1;
break;
}
- if (l <= 0 || hlen - i < l) {
+ if (l < 1 || hlen - i < l) {
+ invalopt:
ipseclog((LOG_ERR,
"ah4_calccksum: invalid IP option "
"(type=%02x len=%02x)\n",
p[i + IPOPT_OPTVAL],
p[i + IPOPT_OLEN]));
- m_free(n);
- n = NULL;
error = EINVAL;
goto fail;
}
break;
i += l;
}
+
p = mtod(n, u_char *) + sizeof(struct ip);
- (algo->update)(&algos, p, hlen - sizeof(struct ip));
+ (algo->update)(&algos, (caddr_t)p, hlen - sizeof(struct ip));
m_free(n);
n = NULL;
if (off < m->m_pkthdr.len)
goto again;
- (algo->result)(&algos, &sumbuf[0]);
+ if (len < (*algo->sumsiz)(sav)) {
+ error = EINVAL;
+ goto fail;
+ }
+
+ (algo->result)(&algos, (caddr_t) &sumbuf[0], sizeof(sumbuf));
bcopy(&sumbuf[0], ahdat, (*algo->sumsiz)(sav));
if (n)
m_free(n);
return error;
}
+#endif
#if INET6
/*
* Don't use m_copy(), it will try to share cluster mbuf by using refcnt.
*/
int
-ah6_calccksum(m, ahdat, algo, sav)
+ah6_calccksum(m, ahdat, len, algo, sav)
struct mbuf *m;
caddr_t ahdat;
- struct ah_algorithm *algo;
+ size_t len;
+ const struct ah_algorithm *algo;
struct secasvar *sav;
{
int newoff, off;
if ((m->m_flags & M_PKTHDR) == 0)
return EINVAL;
- (algo->init)(&algos, sav);
+ error = (algo->init)(&algos, sav);
+ if (error)
+ return error;
off = 0;
proto = IPPROTO_IPV6;
goto again;
}
- (algo->result)(&algos, &sumbuf[0]);
+ if (len < (*algo->sumsiz)(sav)) {
+ error = EINVAL;
+ goto fail;
+ }
+
+ (algo->result)(&algos, (caddr_t) &sumbuf[0], sizeof(sumbuf));
bcopy(&sumbuf[0], ahdat, (*algo->sumsiz)(sav));
/* just in case */
projects / apple / xnu.git / blobdiff