/*
- * Copyright (c) 2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2008-2016 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
* 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,
* 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@
*/
struct secasvar *, const struct esp_algorithm *, int);
static int esp_cbc_encrypt(struct mbuf *, size_t, size_t,
struct secasvar *, const struct esp_algorithm *, int);
+static int esp_gcm_mature(struct secasvar *);
#define MAXIVLEN 16
+#define ESP_AESGCM_KEYLEN128 160 // 16-bytes key + 4 bytes salt
+#define ESP_AESGCM_KEYLEN192 224 // 24-bytes key + 4 bytes salt
+#define ESP_AESGCM_KEYLEN256 288 // 32-bytes key + 4 bytes salt
+
static const struct esp_algorithm des_cbc =
{ 8, -1, esp_descbc_mature, 64, 64, esp_des_schedlen,
"des-cbc",
esp_descbc_ivlen, esp_cbc_decrypt,
esp_cbc_encrypt, esp_des_schedule,
- esp_des_blockdecrypt, esp_des_blockencrypt, };
+ esp_des_blockdecrypt, esp_des_blockencrypt,
+ 0, 0, 0 };
static const struct esp_algorithm des3_cbc =
{ 8, 8, esp_cbc_mature, 192, 192, esp_3des_schedlen,
"3des-cbc",
esp_common_ivlen, esp_cbc_decrypt,
esp_cbc_encrypt, esp_3des_schedule,
- esp_3des_blockdecrypt, esp_3des_blockencrypt, };
+ esp_3des_blockdecrypt, esp_3des_blockencrypt,
+ 0, 0, 0 };
static const struct esp_algorithm null_esp =
{ 1, 0, esp_null_mature, 0, 2048, 0, "null",
esp_common_ivlen, esp_null_decrypt,
- esp_null_encrypt, NULL, NULL, NULL };
+ esp_null_encrypt, NULL, NULL, NULL,
+ 0, 0, 0 };
static const struct esp_algorithm aes_cbc =
{ 16, 16, esp_cbc_mature, 128, 256, esp_aes_schedlen,
"aes-cbc",
esp_common_ivlen, esp_cbc_decrypt_aes,
esp_cbc_encrypt_aes, esp_aes_schedule,
- 0, 0 };
+ 0, 0,
+ 0, 0, 0 };
+static const struct esp_algorithm aes_gcm =
+ { 4, 8, esp_gcm_mature, ESP_AESGCM_KEYLEN128, ESP_AESGCM_KEYLEN256, esp_gcm_schedlen,
+ "aes-gcm",
+ esp_common_ivlen, esp_gcm_decrypt_aes,
+ esp_gcm_encrypt_aes, esp_gcm_schedule,
+ 0, 0,
+ 16, esp_gcm_decrypt_finalize, esp_gcm_encrypt_finalize};
static const struct esp_algorithm *esp_algorithms[] = {
&des_cbc,
&des3_cbc,
&null_esp,
- &aes_cbc
+ &aes_cbc,
+ &aes_gcm,
};
const struct esp_algorithm *
-esp_algorithm_lookup(idx)
- int idx;
+esp_algorithm_lookup(int idx)
{
switch (idx) {
case SADB_EALG_DESCBC:
return &null_esp;
case SADB_X_EALG_RIJNDAELCBC:
return &aes_cbc;
+ case SADB_X_EALG_AES_GCM:
+ return &aes_gcm;
default:
return NULL;
}
}
int
-esp_max_ivlen()
+esp_max_ivlen(void)
{
int idx;
int ivlen;
}
int
-esp_schedule(algo, sav)
- const struct esp_algorithm *algo;
- struct secasvar *sav;
+esp_schedule(const struct esp_algorithm *algo, struct secasvar *sav)
{
int error;
}
static int
-esp_descbc_mature(sav)
- struct secasvar *sav;
+esp_descbc_mature(struct secasvar *sav)
{
const struct esp_algorithm *algo;
}
static int
-esp_cbc_mature(sav)
- struct secasvar *sav;
+esp_cbc_mature(struct secasvar *sav)
{
int keylen;
const struct esp_algorithm *algo;
return 0;
}
+static int
+esp_gcm_mature(struct secasvar *sav)
+{
+ int keylen;
+ const struct esp_algorithm *algo;
+
+ if (sav->flags & SADB_X_EXT_OLD) {
+ ipseclog((LOG_ERR,
+ "esp_gcm_mature: algorithm incompatible with esp-old\n"));
+ return 1;
+ }
+ if (sav->flags & SADB_X_EXT_DERIV) {
+ ipseclog((LOG_ERR,
+ "esp_gcm_mature: algorithm incompatible with derived\n"));
+ return 1;
+ }
+
+ if (!sav->key_enc) {
+ ipseclog((LOG_ERR, "esp_gcm_mature: no key is given.\n"));
+ return 1;
+ }
+
+ algo = esp_algorithm_lookup(sav->alg_enc);
+ if (!algo) {
+ ipseclog((LOG_ERR,
+ "esp_gcm_mature: unsupported algorithm.\n"));
+ return 1;
+ }
+
+ keylen = sav->key_enc->sadb_key_bits;
+ if (keylen < algo->keymin || algo->keymax < keylen) {
+ ipseclog((LOG_ERR,
+ "esp_gcm_mature %s: invalid key length %d.\n",
+ algo->name, sav->key_enc->sadb_key_bits));
+ return 1;
+ }
+ switch (sav->alg_enc) {
+ case SADB_X_EALG_AES_GCM:
+ /* allows specific key sizes only */
+ if (!(keylen == ESP_AESGCM_KEYLEN128 || keylen == ESP_AESGCM_KEYLEN192 || keylen == ESP_AESGCM_KEYLEN256)) {
+ ipseclog((LOG_ERR,
+ "esp_gcm_mature %s: invalid key length %d.\n",
+ algo->name, keylen));
+ return 1;
+ }
+ break;
+ default:
+ ipseclog((LOG_ERR,
+ "esp_gcm_mature %s: invalid algo %d.\n", sav->alg_enc));
+ return 1;
+ }
+
+ return 0;
+}
+
static int
esp_3des_schedlen(
__unused const struct esp_algorithm *algo)
}
static int
-esp_cbc_decrypt(m, off, sav, algo, ivlen)
- struct mbuf *m;
- size_t off;
- struct secasvar *sav;
- const struct esp_algorithm *algo;
- int ivlen;
+esp_cbc_decrypt(struct mbuf *m, size_t off, struct secasvar *sav,
+ const struct esp_algorithm *algo, int ivlen)
{
struct mbuf *s;
struct mbuf *d, *d0, *dp;
/* does not free m0 on error */
int
-esp_auth(m0, skip, length, sav, sum)
- struct mbuf *m0;
- size_t skip; /* offset to ESP header */
- size_t length; /* payload length */
- struct secasvar *sav;
- u_char *sum;
+esp_auth(
+ struct mbuf *m0,
+ size_t skip, /* offset to ESP header */
+ size_t length, /* payload length */
+ struct secasvar *sav,
+ u_char *sum)
{
struct mbuf *m;
size_t off;
projects / apple / xnu.git / blobdiff