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
|
/* $OpenBSD: tls_server.c,v 1.7 2015/03/31 14:03:38 jsing Exp $ */
/*
* Copyright (c) 2014 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 <openssl/ec.h>
#include <openssl/ssl.h>
#include <tls.h>
#include "tls_internal.h"
struct tls *
tls_server(void)
{
struct tls *ctx;
if ((ctx = tls_new()) == NULL)
return (NULL);
ctx->flags |= TLS_SERVER;
return (ctx);
}
struct tls *
tls_server_conn(struct tls *ctx)
{
struct tls *conn_ctx;
if ((conn_ctx = tls_new()) == NULL)
return (NULL);
conn_ctx->flags |= TLS_SERVER_CONN;
return (conn_ctx);
}
int
tls_configure_server(struct tls *ctx)
{
EC_KEY *ecdh_key;
unsigned char sid[SSL_MAX_SSL_SESSION_ID_LENGTH];
if ((ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
tls_set_error(ctx, "ssl context failure");
goto err;
}
if (tls_configure_ssl(ctx) != 0)
goto err;
if (tls_configure_keypair(ctx) != 0)
goto err;
if (ctx->config->dheparams == -1)
SSL_CTX_set_dh_auto(ctx->ssl_ctx, 1);
else if (ctx->config->dheparams == 1024)
SSL_CTX_set_dh_auto(ctx->ssl_ctx, 2);
if (ctx->config->ecdhecurve == -1) {
SSL_CTX_set_ecdh_auto(ctx->ssl_ctx, 1);
} else if (ctx->config->ecdhecurve != NID_undef) {
if ((ecdh_key = EC_KEY_new_by_curve_name(
ctx->config->ecdhecurve)) == NULL) {
tls_set_error(ctx, "failed to set ECDHE curve");
goto err;
}
SSL_CTX_set_options(ctx->ssl_ctx, SSL_OP_SINGLE_ECDH_USE);
SSL_CTX_set_tmp_ecdh(ctx->ssl_ctx, ecdh_key);
EC_KEY_free(ecdh_key);
}
/*
* Set session ID context to a random value. We don't support
* persistent caching of sessions so it is OK to set a temporary
* session ID context that is valid during run time.
*/
arc4random_buf(sid, sizeof(sid));
if (!SSL_CTX_set_session_id_context(ctx->ssl_ctx, sid, sizeof(sid))) {
tls_set_error(ctx, "failed to set session id context");
goto err;
}
return (0);
err:
return (-1);
}
int
tls_accept_fds(struct tls *ctx, struct tls **cctx, int fd_read, int fd_write)
{
struct tls *conn_ctx = *cctx;
int ret, err;
if ((ctx->flags & TLS_SERVER) == 0) {
tls_set_error(ctx, "not a server context");
goto err;
}
if (conn_ctx == NULL) {
if ((conn_ctx = tls_server_conn(ctx)) == NULL) {
tls_set_error(ctx, "connection context failure");
goto err;
}
*cctx = conn_ctx;
if ((conn_ctx->ssl_conn = SSL_new(ctx->ssl_ctx)) == NULL) {
tls_set_error(ctx, "ssl failure");
goto err;
}
if (SSL_set_rfd(conn_ctx->ssl_conn, fd_read) != 1 ||
SSL_set_wfd(conn_ctx->ssl_conn, fd_write) != 1) {
tls_set_error(ctx, "ssl set fd failure");
goto err;
}
SSL_set_app_data(conn_ctx->ssl_conn, conn_ctx);
}
if ((ret = SSL_accept(conn_ctx->ssl_conn)) != 1) {
err = tls_ssl_error(ctx, conn_ctx->ssl_conn, ret, "accept");
if (err == TLS_READ_AGAIN || err == TLS_WRITE_AGAIN) {
return (err);
}
goto err;
}
return (0);
err:
return (-1);
}
int
tls_accept_socket(struct tls *ctx, struct tls **cctx, int socket)
{
int rv;
rv = tls_accept_fds(ctx, cctx, socket, socket);
if (*cctx != NULL)
(*cctx)->socket = socket;
return (rv);
}
|
