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
|
/*
* Copyright 1998-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*-
* A minimal program to do SSL to a passed host and port.
* It is actually using non-blocking IO but in a very simple manner
* sconnect host:port - it does a 'GET / HTTP/1.0'
*
* cc -I../../include sconnect.c -L../.. -lssl -lcrypto
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#if !defined(OPENSSL_SYS_WINDOWS)
#include <unistd.h>
#else
#include <windows.h>
# define sleep(x) Sleep(x*1000)
#endif
#define HOSTPORT "localhost:4433"
#define CAFILE "root.pem"
int main(int argc, char *argv[])
{
const char *hostport = HOSTPORT;
const char *CAfile = CAFILE;
const char *hostname;
BIO *out = NULL;
char buf[1024 * 10], *p;
SSL_CTX *ssl_ctx = NULL;
SSL *ssl;
BIO *ssl_bio;
int i, len, off, ret = EXIT_FAILURE;
if (argc > 1)
hostport = argv[1];
if (argc > 2)
CAfile = argv[2];
#ifdef WATT32
dbug_init();
sock_init();
#endif
ssl_ctx = SSL_CTX_new(TLS_client_method());
/* Enable trust chain verification */
SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL);
if (!SSL_CTX_load_verify_locations(ssl_ctx, CAfile, NULL))
goto err;
/* Lets make a SSL structure */
ssl = SSL_new(ssl_ctx);
SSL_set_connect_state(ssl);
/* Use it inside an SSL BIO */
ssl_bio = BIO_new(BIO_f_ssl());
BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
/* Lets use a connect BIO under the SSL BIO */
out = BIO_new(BIO_s_connect());
BIO_set_conn_hostname(out, hostport);
/* The BIO has parsed the host:port and even IPv6 literals in [] */
hostname = BIO_get_conn_hostname(out);
if (!hostname || SSL_set1_host(ssl, hostname) <= 0)
goto err;
BIO_set_nbio(out, 1);
out = BIO_push(ssl_bio, out);
p = "GET / HTTP/1.0\r\n\r\n";
len = strlen(p);
off = 0;
for (;;) {
i = BIO_write(out, &(p[off]), len);
if (i <= 0) {
if (BIO_should_retry(out)) {
fprintf(stderr, "write DELAY\n");
sleep(1);
continue;
} else {
goto err;
}
}
off += i;
len -= i;
if (len <= 0)
break;
}
for (;;) {
i = BIO_read(out, buf, sizeof(buf));
if (i == 0)
break;
if (i < 0) {
if (BIO_should_retry(out)) {
fprintf(stderr, "read DELAY\n");
sleep(1);
continue;
}
goto err;
}
fwrite(buf, 1, i, stdout);
}
ret = EXIT_SUCCESS;
goto done;
err:
if (ERR_peek_error() == 0) { /* system call error */
fprintf(stderr, "errno=%d ", errno);
perror("error");
} else {
ERR_print_errors_fp(stderr);
}
done:
BIO_free_all(out);
SSL_CTX_free(ssl_ctx);
return ret;
}
|
