blob: 61c036c7eb568122d80621757f200cf64cd26656 (
plain)
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
|
/*
*
* Copyright 2018 gRPC authors.
*
* 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 <grpc/support/port_platform.h>
#include "src/core/tsi/ssl/session_cache/ssl_session.h"
#include <grpc/support/log.h>
#ifndef OPENSSL_IS_BORINGSSL
// OpenSSL invalidates SSL_SESSION on SSL destruction making it pointless
// to cache sessions. The workaround is to serialize (relatively expensive)
// session into binary blob and re-create it from blob on every handshake.
// Note that it's safe to keep serialized session outside of SSL lifetime
// as openssl performs all necessary validation while attempting to use a
// session and creates a new one if something is wrong (e.g. server changed
// set of allowed codecs).
namespace tsi {
namespace {
class OpenSslCachedSession : public SslCachedSession {
public:
OpenSslCachedSession(SslSessionPtr session) {
int size = i2d_SSL_SESSION(session.get(), nullptr);
GPR_ASSERT(size > 0);
grpc_slice slice = grpc_slice_malloc(size_t(size));
unsigned char* start = GRPC_SLICE_START_PTR(slice);
int second_size = i2d_SSL_SESSION(session.get(), &start);
GPR_ASSERT(size == second_size);
serialized_session_ = slice;
}
virtual ~OpenSslCachedSession() { grpc_slice_unref(serialized_session_); }
SslSessionPtr CopySession() const override {
const unsigned char* data = GRPC_SLICE_START_PTR(serialized_session_);
size_t length = GRPC_SLICE_LENGTH(serialized_session_);
SSL_SESSION* session = d2i_SSL_SESSION(nullptr, &data, length);
if (session == nullptr) {
return SslSessionPtr();
}
return SslSessionPtr(session);
}
private:
grpc_slice serialized_session_;
};
} // namespace
grpc_core::UniquePtr<SslCachedSession> SslCachedSession::Create(
SslSessionPtr session) {
return grpc_core::UniquePtr<SslCachedSession>(
grpc_core::New<OpenSslCachedSession>(std::move(session)));
}
} // namespace tsi
#endif /* OPENSSL_IS_BORINGSSL */
|
