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/*
* init.c : ipsecmb common code
*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <vnet/plugin/plugin.h>
#include <vpp/app/version.h>
#include <ipsecmb/ipsecmb.h>
ipsecmb_main_t ipsecmb_main;
int
sa_expand_keys (u32 sa_index)
{
ipsecmb_main_t *imbm = &ipsecmb_main;
ipsec_sa_t *sa = pool_elt_at_index (ipsec_main.sad, sa_index);
ipsecmb_sa_t *samb = pool_elt_at_index (imbm->sad, sa_index);
if (sa->crypto_key_len > 0)
{
const keyexp_t keyexp_fn = imbm->crypto_algs[sa->crypto_alg].keyexp_fn;
keyexp_fn (sa->crypto_key, samb->aes_enc_key_expanded,
samb->aes_dec_key_expanded);
}
if (sa->integ_key_len > 0)
{
const u8 block_size = imbm->integ_algs[sa->integ_alg].block_size;
const hash_one_block_t hash_one_block_fn =
imbm->integ_algs[sa->integ_alg].hash_one_block_fn;
u8 buf[block_size];
int i = 0;
if (sa->integ_key_len > block_size)
{
return VNET_API_ERROR_SYSCALL_ERROR_1; // FIXME use correct value
}
memset (buf, 0x36, sizeof (buf));
for (i = 0; i < sa->integ_key_len; i++)
{
buf[i] ^= sa->integ_key[i];
}
hash_one_block_fn (buf, samb->ipad_hash);
memset (buf, 0x5c, sizeof (buf));
for (i = 0; i < sa->integ_key_len; i++)
{
buf[i] ^= sa->integ_key[i];
}
hash_one_block_fn (buf, samb->opad_hash);
}
return 0;
}
static clib_error_t *
ipsecmb_add_del_sa_session (u32 sa_index, u8 is_add)
{
ipsecmb_main_t *imbm = &ipsecmb_main;
if (is_add)
{
ipsecmb_sa_t *samb = NULL;
pool_get (imbm->sad, samb);
ASSERT (samb == pool_elt_at_index (imbm->sad, sa_index));
sa_expand_keys (sa_index);
}
else
{
pool_put_index (imbm->sad, sa_index);
}
return 0;
}
clib_error_t *
ipsecmb_check_esp_support (ipsec_sa_t * sa)
{
switch (sa->crypto_alg)
{
case IPSEC_CRYPTO_ALG_NONE:
break;
case IPSEC_CRYPTO_ALG_DES_CBC:
case IPSEC_CRYPTO_ALG_3DES_CBC:
return clib_error_return (0, "unsupported (3)des crypto-alg");
case IPSEC_CRYPTO_ALG_AES_CBC_128:
case IPSEC_CRYPTO_ALG_AES_CBC_192:
case IPSEC_CRYPTO_ALG_AES_CBC_256:
break;
case IPSEC_CRYPTO_ALG_AES_CTR_128:
case IPSEC_CRYPTO_ALG_AES_CTR_192:
case IPSEC_CRYPTO_ALG_AES_CTR_256:
return clib_error_return (0, "unsupported aes-ctr crypto-alg");
case IPSEC_CRYPTO_ALG_AES_GCM_128:
case IPSEC_CRYPTO_ALG_AES_GCM_192:
case IPSEC_CRYPTO_ALG_AES_GCM_256:
return clib_error_return (0, "unsupported aes-gcm crypto-alg");
case IPSEC_CRYPTO_N_ALG:
return clib_error_return (0, "invalid crypto-alg");
}
switch (sa->integ_alg)
{
case IPSEC_INTEG_ALG_NONE:
return clib_error_return (0, "unsupported none integ-alg");
case IPSEC_INTEG_ALG_MD5_96:
return clib_error_return (0, "unsupported md5 integ-alg");
case IPSEC_INTEG_ALG_SHA1_96:
case IPSEC_INTEG_ALG_SHA_256_96:
case IPSEC_INTEG_ALG_SHA_256_128:
case IPSEC_INTEG_ALG_SHA_384_192:
case IPSEC_INTEG_ALG_SHA_512_256:
break;
case IPSEC_INTEG_N_ALG:
return clib_error_return (0, "invalid integ-alg");
}
return 0;
}
clib_error_t *
ipsecmb_check_ah_support (ipsec_sa_t * sa)
{
switch (sa->integ_alg)
{
case IPSEC_INTEG_ALG_NONE:
return clib_error_return (0, "unsupported none integ-alg");
case IPSEC_INTEG_ALG_MD5_96:
return clib_error_return (0, "unsupported md5 integ-alg");
case IPSEC_INTEG_ALG_SHA1_96:
case IPSEC_INTEG_ALG_SHA_256_96:
case IPSEC_INTEG_ALG_SHA_256_128:
case IPSEC_INTEG_ALG_SHA_384_192:
case IPSEC_INTEG_ALG_SHA_512_256:
break;
case IPSEC_INTEG_N_ALG:
return clib_error_return (0, "invalid integ-alg");
}
return 0;
}
static clib_error_t *
ipsecmb_init (vlib_main_t * vm)
{
ipsecmb_main_t *imbm = &ipsecmb_main;
imbm->dev_urandom_fd = open ("/dev/urandom", O_RDONLY);
if (!imbm->dev_urandom_fd)
{
return clib_error_return_unix_fatal (0,
"Can't open /dev/urandom for read");
}
vlib_thread_main_t *tm = vlib_get_thread_main ();
imbm->crypto_algs = NULL;
imbm->integ_algs = NULL;
vec_validate (imbm->crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
vec_validate (imbm->integ_algs, IPSEC_INTEG_N_ALG - 1);
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].block_size = 16;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].block_size = 16;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].block_size = 16;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_DES_CBC].block_size = 8;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_3DES_CBC].block_size = 8;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].iv_size = 16;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].iv_size = 16;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].iv_size = 16;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_DES_CBC].iv_size = 8;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_3DES_CBC].iv_size = 8;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].cipher_mode = CBC;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].cipher_mode = CBC;
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].cipher_mode = CBC;
ipsecmb_integ_alg_t *i;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
i->hash_alg = SHA1;
i->block_size = SHA1_BLOCK_SIZE;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
i->hash_alg = SHA_256;
i->block_size = SHA_256_BLOCK_SIZE;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
i->hash_alg = SHA_256;
i->block_size = SHA_256_BLOCK_SIZE;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
i->hash_alg = SHA_384;
i->block_size = SHA_384_BLOCK_SIZE;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
i->hash_alg = SHA_512;
i->block_size = SHA_512_BLOCK_SIZE;
vec_validate (imbm->mb_mgr, tm->n_vlib_mains - 1);
MB_MGR **mgr;
#define __set_funcs(arch) \
do \
{ \
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_128].keyexp_fn = \
aes_keyexp_128_##arch; \
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_192].keyexp_fn = \
aes_keyexp_192_##arch; \
imbm->crypto_algs[IPSEC_CRYPTO_ALG_AES_CBC_256].keyexp_fn = \
aes_keyexp_256_##arch; \
imbm->integ_algs[IPSEC_INTEG_ALG_SHA1_96].hash_one_block_fn = \
sha1_one_block_##arch; \
imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_96].hash_one_block_fn = \
sha256_one_block_##arch; \
imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_128].hash_one_block_fn = \
sha256_one_block_##arch; \
imbm->integ_algs[IPSEC_INTEG_ALG_SHA_384_192].hash_one_block_fn = \
sha384_one_block_##arch; \
imbm->integ_algs[IPSEC_INTEG_ALG_SHA_512_256].hash_one_block_fn = \
sha512_one_block_##arch; \
} \
while (0);
if (clib_cpu_supports_avx512f ())
{
__set_funcs (avx512);
vec_foreach (mgr, imbm->mb_mgr)
{
*mgr = alloc_mb_mgr (0);
init_mb_mgr_avx512 (*mgr);
}
}
else if (clib_cpu_supports_avx2 ())
{
__set_funcs (avx2);
vec_foreach (mgr, imbm->mb_mgr)
{
*mgr = alloc_mb_mgr (0);
init_mb_mgr_avx2 (*mgr);
}
}
else
{
__set_funcs (sse);
vec_foreach (mgr, imbm->mb_mgr)
{
*mgr = alloc_mb_mgr (0);
init_mb_mgr_sse (*mgr);
}
}
#undef __set_funcs
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
i->hash_output_length = 12;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
i->hash_output_length = 12;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
i->hash_output_length = 16;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
i->hash_output_length = 24;
i = &imbm->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
i->hash_output_length = 32;
vec_validate (imbm->per_thread_data, tm->n_vlib_mains - 1);
return 0;
}
VLIB_INIT_FUNCTION (ipsecmb_init);
static uword
ipsecmb_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
{
ipsec_main_t *im = &ipsec_main;
ipsec_register_ah_backend (vm, im, "ipsecmb backend",
"ah4-encrypt-ipsecmb",
"ah4-decrypt-ipsecmb",
"ah6-encrypt-ipsecmb",
"ah6-decrypt-ipsecmb",
ipsecmb_check_ah_support,
ipsecmb_add_del_sa_session);
ipsec_register_esp_backend (vm, im, "ipsecmb backend",
"esp4-encrypt-ipsecmb",
"esp4-decrypt-ipsecmb",
"esp6-encrypt-ipsecmb",
"esp6-decrypt-ipsecmb",
ipsecmb_check_esp_support,
ipsecmb_add_del_sa_session);
return 0;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ipsecmb_process_node, static) = {
.function = ipsecmb_process,
.type = VLIB_NODE_TYPE_PROCESS,
.name = "ipsecmb-process",
.process_log2_n_stack_bytes = 17,
};
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "IPsecMB plugin",
.default_disabled = 1,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
