1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
|
/*
*------------------------------------------------------------------
* 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;
int iv_len;
if (op->op == VNET_CRYPTO_OP_3DES_CBC_ENC)
iv_len = 8;
else
iv_len = 16;
if (op->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
RAND_bytes (op->iv, iv_len);
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);
int len;
if (op->flags & VNET_CRYPTO_OP_FLAG_INIT_IV)
RAND_bytes (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, op->iv);
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_BAD_HMAC;
}
}
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;
time_t t;
pid_t pid;
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;
}
/* *INDENT-OFF* */
VLIB_INIT_FUNCTION (crypto_openssl_init) =
{
.runs_after = VLIB_INITS ("vnet_crypto_init"),
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "OpenSSL Crypto Engine",
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
