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/*
*------------------------------------------------------------------
* Copyright (c) 2019 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 <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/rand.h>
#include <vlib/vlib.h>
#include <vnet/plugin/plugin.h>
#include <vnet/crypto/crypto.h>
#include <vpp/app/version.h>
typedef struct
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
EVP_CIPHER_CTX *evp_cipher_ctx;
HMAC_CTX *hmac_ctx;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
HMAC_CTX _hmac_ctx;
#endif
} openssl_per_thread_data_t;
static openssl_per_thread_data_t *per_thread_data = 0;
#define foreach_openssl_evp_op \
_(cbc, DES_CBC, EVP_des_cbc) \
_(cbc, 3DES_CBC, EVP_des_ede3_cbc) \
_(cbc, AES_128_CBC, EVP_aes_128_cbc) \
_(cbc, AES_192_CBC, EVP_aes_192_cbc) \
_(cbc, AES_256_CBC, EVP_aes_256_cbc) \
_(gcm, AES_128_GCM, EVP_aes_128_gcm) \
_(gcm, AES_192_GCM, EVP_aes_192_gcm) \
_(gcm, AES_256_GCM, EVP_aes_256_gcm) \
_(cbc, AES_128_CTR, EVP_aes_128_ctr) \
_(cbc, AES_192_CTR, EVP_aes_192_ctr) \
_(cbc, AES_256_CTR, EVP_aes_256_ctr) \
#define foreach_openssl_hmac_op \
_(MD5, EVP_md5) \
_(SHA1, EVP_sha1) \
_(SHA224, EVP_sha224) \
_(SHA256, EVP_sha256) \
_(SHA384, EVP_sha384) \
_(SHA512, EVP_sha512)
static_always_inline u32
openssl_ops_enc_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
const EVP_CIPHER * cipher)
{
openssl_per_thread_data_t *ptd = vec_elt_at_index (per_thread_data,
vm->thread_index);
EVP_CIPHER_CTX *ctx = ptd->evp_cipher_ctx;
u32 i;
for (i = 0; i < n_ops; i++)
{
vnet_crypto_op_t *op = ops[i];
vnet_crypto_key_t *key = vnet_crypto_get_key (op->key_index);
int out_len;
if (op->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
RAND_bytes (op->iv, 16);
EVP_EncryptInit_ex (ctx, cipher, NULL, key->data, op->iv);
EVP_EncryptUpdate (ctx, op->dst, &out_len, op->src, op->len);
if (out_len < op->len)
EVP_EncryptFinal_ex (ctx, op->dst + out_len, &out_len);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
}
return n_ops;
}
static_always_inline u32
openssl_ops_dec_cbc (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
const EVP_CIPHER * cipher)
{
openssl_per_thread_data_t *ptd = vec_elt_at_index (per_thread_data,
vm->thread_index);
EVP_CIPHER_CTX *ctx = ptd->evp_cipher_ctx;
u32 i;
for (i = 0; i < n_ops; i++)
{
vnet_crypto_op_t *op = ops[i];
vnet_crypto_key_t *key = vnet_crypto_get_key (op->key_index);
int out_len;
EVP_DecryptInit_ex (ctx, cipher, NULL, key->data, op->iv);
EVP_DecryptUpdate (ctx, op->dst, &out_len, op->src, op->len);
if (out_len < op->len)
EVP_DecryptFinal_ex (ctx, op->dst + out_len, &out_len);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
}
return n_ops;
}
static_always_inline u32
openssl_ops_enc_gcm (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
const EVP_CIPHER * cipher)
{
openssl_per_thread_data_t *ptd = vec_elt_at_index (per_thread_data,
vm->thread_index);
EVP_CIPHER_CTX *ctx = ptd->evp_cipher_ctx;
u32 i;
for (i = 0; i < n_ops; i++)
{
vnet_crypto_op_t *op = ops[i];
vnet_crypto_key_t *key = vnet_crypto_get_key (op->key_index);
u32 nonce[3];
int len;
if (op->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
RAND_bytes (op->iv, 8);
nonce[0] = op->salt;
clib_memcpy_fast (nonce + 1, op->iv, 8);
EVP_EncryptInit_ex (ctx, cipher, 0, 0, 0);
EVP_CIPHER_CTX_ctrl (ctx, EVP_CTRL_GCM_SET_IVLEN, 12, NULL);
EVP_EncryptInit_ex (ctx, 0, 0, key->data, (u8 *) nonce);
if (op->aad_len)
EVP_EncryptUpdate (ctx, NULL, &len, op->aad, op->aad_len);
EVP_EncryptUpdate (ctx, op->dst, &len, op->src, op->len);
EVP_EncryptFinal_ex (ctx, op->dst + len, &len);
EVP_CIPHER_CTX_ctrl (ctx, EVP_CTRL_GCM_GET_TAG, op->tag_len, op->tag);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
}
return n_ops;
}
static_always_inline u32
openssl_ops_dec_gcm (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
const EVP_CIPHER * cipher)
{
openssl_per_thread_data_t *ptd = vec_elt_at_index (per_thread_data,
vm->thread_index);
EVP_CIPHER_CTX *ctx = ptd->evp_cipher_ctx;
u32 i, n_fail = 0;
for (i = 0; i < n_ops; i++)
{
vnet_crypto_op_t *op = ops[i];
vnet_crypto_key_t *key = vnet_crypto_get_key (op->key_index);
int len;
EVP_DecryptInit_ex (ctx, cipher, 0, 0, 0);
EVP_CIPHER_CTX_ctrl (ctx, EVP_CTRL_GCM_SET_IVLEN, 12, 0);
EVP_DecryptInit_ex (ctx, 0, 0, key->data, op->iv);
if (op->aad_len)
EVP_DecryptUpdate (ctx, 0, &len, op->aad, op->aad_len);
EVP_DecryptUpdate (ctx, op->dst, &len, op->src, op->len);
EVP_CIPHER_CTX_ctrl (ctx, EVP_CTRL_GCM_SET_TAG, op->tag_len, op->tag);
if (EVP_DecryptFinal_ex (ctx, op->dst + len, &len) > 0)
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
else
{
n_fail++;
op->status = VNET_CRYPTO_OP_STATUS_FAIL_DECRYPT;
}
}
return n_ops - n_fail;
}
static_always_inline u32
openssl_ops_hmac (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops,
const EVP_MD * md)
{
u8 buffer[64];
openssl_per_thread_data_t *ptd = vec_elt_at_index (per_thread_data,
vm->thread_index);
HMAC_CTX *ctx = ptd->hmac_ctx;
u32 i, n_fail = 0;
for (i = 0; i < n_ops; i++)
{
vnet_crypto_op_t *op = ops[i];
vnet_crypto_key_t *key = vnet_crypto_get_key (op->key_index);
unsigned int out_len;
size_t sz = op->digest_len ? op->digest_len : EVP_MD_size (md);
HMAC_Init_ex (ctx, key->data, vec_len (key->data), md, NULL);
HMAC_Update (ctx, op->src, op->len);
HMAC_Final (ctx, buffer, &out_len);
if (op->flags & VNET_CRYPTO_OP_FLAG_HMAC_CHECK)
{
if ((memcmp (op->digest, buffer, sz)))
{
n_fail++;
op->status = VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC;
continue;
}
}
else
clib_memcpy_fast (op->digest, buffer, sz);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
}
return n_ops - n_fail;
}
#define _(m, a, b) \
static u32 \
openssl_ops_enc_##a (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
{ return openssl_ops_enc_##m (vm, ops, n_ops, b ()); } \
\
u32 \
openssl_ops_dec_##a (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
{ return openssl_ops_dec_##m (vm, ops, n_ops, b ()); }
foreach_openssl_evp_op;
#undef _
#define _(a, b) \
static u32 \
openssl_ops_hmac_##a (vlib_main_t * vm, vnet_crypto_op_t * ops[], u32 n_ops) \
{ return openssl_ops_hmac (vm, ops, n_ops, b ()); } \
foreach_openssl_hmac_op;
#undef _
clib_error_t *
crypto_openssl_init (vlib_main_t * vm)
{
vlib_thread_main_t *tm = vlib_get_thread_main ();
openssl_per_thread_data_t *ptd;
u8 *seed_data = 0;
clib_error_t *error;
time_t t;
pid_t pid;
if ((error = vlib_call_init_function (vm, vnet_crypto_init)))
return error;
u32 eidx = vnet_crypto_register_engine (vm, "openssl", 50, "OpenSSL");
#define _(m, a, b) \
vnet_crypto_register_ops_handler (vm, eidx, VNET_CRYPTO_OP_##a##_ENC, \
openssl_ops_enc_##a); \
vnet_crypto_register_ops_handler (vm, eidx, VNET_CRYPTO_OP_##a##_DEC, \
openssl_ops_dec_##a);
foreach_openssl_evp_op;
#undef _
#define _(a, b) \
vnet_crypto_register_ops_handler (vm, eidx, VNET_CRYPTO_OP_##a##_HMAC, \
openssl_ops_hmac_##a); \
foreach_openssl_hmac_op;
#undef _
vec_validate_aligned (per_thread_data, tm->n_vlib_mains - 1,
CLIB_CACHE_LINE_BYTES);
vec_foreach (ptd, per_thread_data)
{
ptd->evp_cipher_ctx = EVP_CIPHER_CTX_new ();
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
ptd->hmac_ctx = HMAC_CTX_new ();
#else
HMAC_CTX_init (&(ptd->_hmac_ctx));
ptd->hmac_ctx = &ptd->_hmac_ctx;
#endif
}
t = time (NULL);
pid = getpid ();
vec_add (seed_data, &t, sizeof (t));
vec_add (seed_data, &pid, sizeof (pid));
vec_add (seed_data, seed_data, sizeof (seed_data));
RAND_seed ((const void *) seed_data, vec_len (seed_data));
vec_free (seed_data);
return 0;
}
VLIB_INIT_FUNCTION (crypto_openssl_init);
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "OpenSSL Crypto Engine Plugin",
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
