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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "crypto_codec_adapter.h"
#include <vespa/vespalib/net/connection_auth_context.h>
#include <assert.h>
namespace vespalib::net::tls {
CryptoSocket::HandshakeResult
CryptoCodecAdapter::hs_try_flush()
{
auto flush_res = flush_all();
if (flush_res == 0) {
return HandshakeResult::DONE;
} else if (is_blocked(flush_res, errno)) {
return HandshakeResult::NEED_WRITE;
} else {
return HandshakeResult::FAIL;
}
}
CryptoSocket::HandshakeResult
CryptoCodecAdapter::hs_try_fill()
{
auto fill_res = fill_input();
if (fill_res > 0) {
return HandshakeResult::DONE;
} else if (is_blocked(fill_res, errno)) {
return HandshakeResult::NEED_READ;
} else { // eof included here
return HandshakeResult::FAIL;
}
}
ssize_t
CryptoCodecAdapter::fill_input()
{
if (_input.obtain().size < _codec->min_encode_buffer_size()) {
auto dst = _input.reserve(_codec->min_encode_buffer_size());
ssize_t res = _socket.read(dst.data, dst.size);
if (res > 0) {
_input.commit(res);
} else {
return res; // eof/error
}
}
return 1; // progress
}
ssize_t
CryptoCodecAdapter::flush_all()
{
ssize_t res = flush();
while (res > 0) {
res = flush();
}
return res;
}
void
CryptoCodecAdapter::inject_read_data(const char *buf, size_t len)
{
if (len > 0) {
auto dst = _input.reserve(len);
memcpy(dst.data, buf, len);
_input.commit(len);
}
}
CryptoSocket::HandshakeResult
CryptoCodecAdapter::handshake()
{
for (;;) {
auto in = _input.obtain();
auto out = _output.reserve(_codec->min_encode_buffer_size());
auto hs_res = _codec->handshake(in.data, in.size, out.data, out.size);
_input.evict(hs_res.bytes_consumed);
_output.commit(hs_res.bytes_produced);
switch (hs_res.state) {
case ::vespalib::net::tls::HandshakeResult::State::Failed: return HandshakeResult::FAIL;
case ::vespalib::net::tls::HandshakeResult::State::Done: return hs_try_flush();
case ::vespalib::net::tls::HandshakeResult::State::NeedsWork: return HandshakeResult::NEED_WORK;
case ::vespalib::net::tls::HandshakeResult::State::NeedsMorePeerData:
auto flush_res = hs_try_flush();
if (flush_res != HandshakeResult::DONE) {
return flush_res;
}
auto fill_res = hs_try_fill();
if (fill_res != HandshakeResult::DONE) {
return fill_res;
}
}
}
return HandshakeResult::DONE;
}
void
CryptoCodecAdapter::do_handshake_work()
{
_codec->do_handshake_work();
}
ssize_t
CryptoCodecAdapter::read(char *buf, size_t len)
{
auto drain_res = drain(buf, len);
if ((drain_res != 0) || _got_tls_close) {
return drain_res;
}
auto fill_res = fill_input();
if (fill_res <= 0) {
if (fill_res == 0) {
fill_res = -1;
errno = EIO;
}
return fill_res;
}
drain_res = drain(buf, len);
if ((drain_res != 0) || _got_tls_close) {
return drain_res;
}
errno = EWOULDBLOCK;
return -1;
}
ssize_t
CryptoCodecAdapter::drain(char *buf, size_t len)
{
auto src = _input.obtain();
auto res = _codec->decode(src.data, src.size, buf, len);
if (res.failed()) {
errno = EIO;
return -1;
}
if (res.closed()) {
_got_tls_close = true;
}
_input.evict(res.bytes_consumed);
return res.bytes_produced;
}
ssize_t
CryptoCodecAdapter::write(const char *buf, size_t len)
{
if (_output.obtain().size >= _codec->min_encode_buffer_size()) {
if (flush() < 0) {
return -1;
}
if (_output.obtain().size > 0) {
errno = EWOULDBLOCK;
return -1;
}
}
auto dst = _output.reserve(_codec->min_encode_buffer_size());
auto res = _codec->encode(buf, len, dst.data, dst.size);
if (res.failed) {
errno = EIO;
return -1;
}
_output.commit(res.bytes_produced);
return res.bytes_consumed;
}
ssize_t
CryptoCodecAdapter::flush()
{
auto pending = _output.obtain();
if (pending.size > 0) {
ssize_t res = _socket.write(pending.data, pending.size);
if (res > 0) {
_output.evict(res);
return 1; // progress
} else {
assert(res < 0);
return -1; // error
}
}
return 0; // done
}
ssize_t
CryptoCodecAdapter::half_close()
{
auto flush_res = flush_all();
if (flush_res < 0) {
return flush_res;
}
if (!_encoded_tls_close) {
auto dst = _output.reserve(_codec->min_encode_buffer_size());
auto res = _codec->half_close(dst.data, dst.size);
if (res.failed) {
errno = EIO;
return -1;
}
_output.commit(res.bytes_produced);
_encoded_tls_close = true;
}
flush_res = flush_all();
if (flush_res < 0) {
return flush_res;
}
return _socket.half_close();
}
void
CryptoCodecAdapter::drop_empty_buffers()
{
_input.drop_if_empty();
_output.drop_if_empty();
}
std::unique_ptr<net::ConnectionAuthContext>
CryptoCodecAdapter::make_auth_context()
{
return std::make_unique<net::ConnectionAuthContext>(_codec->peer_credentials(), _codec->granted_capabilities());
}
} // namespace vespalib::net::tls
|
