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
|
/* $OpenBSD: tls13_lib.c,v 1.1 2019/01/21 09:10:58 jsing Exp $ */
/*
* Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <limits.h>
#include <stddef.h>
#include <openssl/evp.h>
#include "ssl_locl.h"
#include "tls13_internal.h"
const EVP_AEAD *
tls13_cipher_aead(const SSL_CIPHER *cipher)
{
if (cipher == NULL)
return NULL;
if (cipher->algorithm_ssl != SSL_TLSV1_3)
return NULL;
switch (cipher->algorithm_enc) {
case SSL_AES128GCM:
return EVP_aead_aes_128_gcm();
case SSL_AES256GCM:
return EVP_aead_aes_256_gcm();
case SSL_CHACHA20POLY1305:
return EVP_aead_chacha20_poly1305();
}
return NULL;
}
const EVP_MD *
tls13_cipher_hash(const SSL_CIPHER *cipher)
{
if (cipher == NULL)
return NULL;
if (cipher->algorithm_ssl != SSL_TLSV1_3)
return NULL;
switch (cipher->algorithm2) {
case SSL_HANDSHAKE_MAC_SHA256:
return EVP_sha256();
case SSL_HANDSHAKE_MAC_SHA384:
return EVP_sha384();
}
return NULL;
}
static ssize_t
tls13_legacy_wire_read(SSL *ssl, uint8_t *buf, size_t len)
{
int n;
if (ssl->rbio == NULL) {
SSLerror(ssl, SSL_R_BIO_NOT_SET);
return TLS13_IO_FAILURE;
}
if ((n = BIO_read(ssl->rbio, buf, len)) <= 0) {
if (BIO_should_read(ssl->rbio))
return TLS13_IO_WANT_POLLIN;
if (BIO_should_write(ssl->rbio))
return TLS13_IO_WANT_POLLOUT;
return TLS13_IO_FAILURE;
}
return n;
}
ssize_t
tls13_legacy_wire_read_cb(void *buf, size_t n, void *arg)
{
struct tls13_ctx *ctx = arg;
return tls13_legacy_wire_read(ctx->ssl, buf, n);
}
static ssize_t
tls13_legacy_wire_write(SSL *ssl, const uint8_t *buf, size_t len)
{
int n;
if (ssl->wbio == NULL) {
SSLerror(ssl, SSL_R_BIO_NOT_SET);
return TLS13_IO_FAILURE;
}
if ((n = BIO_write(ssl->wbio, buf, len)) <= 0) {
if (BIO_should_read(ssl->wbio))
return TLS13_IO_WANT_POLLIN;
if (BIO_should_write(ssl->wbio))
return TLS13_IO_WANT_POLLOUT;
return TLS13_IO_FAILURE;
}
return n;
}
ssize_t
tls13_legacy_wire_write_cb(const void *buf, size_t n, void *arg)
{
struct tls13_ctx *ctx = arg;
return tls13_legacy_wire_write(ctx->ssl, buf, n);
}
static int
tls13_legacy_return_code(SSL *ssl, ssize_t ret)
{
ssl->internal->rwstate = SSL_NOTHING;
if (ret > INT_MAX) {
SSLerror(ssl, ERR_R_INTERNAL_ERROR);
return -1;
}
/* A successful read or write. */
if (ret > 0)
return ret;
switch (ret) {
case TLS13_IO_EOF:
return 0;
case TLS13_IO_FAILURE:
/* XXX - we need to record/map internal errors. */
if (ERR_peek_error() == 0)
SSLerror(ssl, ERR_R_INTERNAL_ERROR);
return -1;
case TLS13_IO_WANT_POLLIN:
ssl->internal->rwstate = SSL_READING;
return -1;
case TLS13_IO_WANT_POLLOUT:
ssl->internal->rwstate = SSL_WRITING;
return -1;
}
SSLerror(ssl, ERR_R_INTERNAL_ERROR);
return -1;
}
int
tls13_legacy_read_bytes(SSL *ssl, int type, unsigned char *buf, int len, int peek)
{
struct tls13_ctx *ctx = ssl->internal->tls13;
ssize_t ret;
if (peek) {
/* XXX - support peek... */
SSLerror(ssl, ERR_R_INTERNAL_ERROR);
return -1;
}
if (type != SSL3_RT_APPLICATION_DATA) {
SSLerror(ssl, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return -1;
}
ret = tls13_read_application_data(ctx->rl, buf, len);
return tls13_legacy_return_code(ssl, ret);
}
int
tls13_legacy_write_bytes(SSL *ssl, int type, const void *buf, int len)
{
struct tls13_ctx *ctx = ssl->internal->tls13;
ssize_t ret;
if (type != SSL3_RT_APPLICATION_DATA) {
SSLerror(ssl, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return -1;
}
ret = tls13_write_application_data(ctx->rl, buf, len);
return tls13_legacy_return_code(ssl, ret);
}
|
