1/*
2 * Copyright 1998-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/*-
11 * A minimal program to do SSL to a passed host and port.
12 * It is actually using non-blocking IO but in a very simple manner
13 * sconnect host:port - it does a 'GET / HTTP/1.0'
14 *
15 * cc -I../../include sconnect.c -L../.. -lssl -lcrypto
16 */
17#include <stdio.h>
18#include <stdlib.h>
19#include <unistd.h>
20#include <string.h>
21#include <errno.h>
22#include <openssl/err.h>
23#include <openssl/ssl.h>
24
25#define HOSTPORT "localhost:4433"
26#define CAFILE "root.pem"
27
28int main(int argc, char *argv[])
29{
30    const char *hostport = HOSTPORT;
31    const char *CAfile = CAFILE;
32    const char *hostname;
33    char *cp;
34    BIO *out = NULL;
35    char buf[1024 * 10], *p;
36    SSL_CTX *ssl_ctx = NULL;
37    SSL *ssl;
38    BIO *ssl_bio;
39    int i, len, off, ret = EXIT_FAILURE;
40
41    if (argc > 1)
42        hostport = argv[1];
43    if (argc > 2)
44        CAfile = argv[2];
45
46#ifdef WATT32
47    dbug_init();
48    sock_init();
49#endif
50
51    ssl_ctx = SSL_CTX_new(TLS_client_method());
52
53    /* Enable trust chain verification */
54    SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL);
55    SSL_CTX_load_verify_locations(ssl_ctx, CAfile, NULL);
56
57    /* Lets make a SSL structure */
58    ssl = SSL_new(ssl_ctx);
59    SSL_set_connect_state(ssl);
60
61
62    /* Use it inside an SSL BIO */
63    ssl_bio = BIO_new(BIO_f_ssl());
64    BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
65
66    /* Lets use a connect BIO under the SSL BIO */
67    out = BIO_new(BIO_s_connect());
68    BIO_set_conn_hostname(out, hostport);
69
70    /* The BIO has parsed the host:port and even IPv6 literals in [] */
71    hostname = BIO_get_conn_hostname(out);
72    if (!hostname || SSL_set1_host(ssl, hostname) <= 0)
73        goto err;
74
75    BIO_set_nbio(out, 1);
76    out = BIO_push(ssl_bio, out);
77
78    p = "GET / HTTP/1.0\r\n\r\n";
79    len = strlen(p);
80
81    off = 0;
82    for (;;) {
83        i = BIO_write(out, &(p[off]), len);
84        if (i <= 0) {
85            if (BIO_should_retry(out)) {
86                fprintf(stderr, "write DELAY\n");
87                sleep(1);
88                continue;
89            } else {
90                goto err;
91            }
92        }
93        off += i;
94        len -= i;
95        if (len <= 0)
96            break;
97    }
98
99    for (;;) {
100        i = BIO_read(out, buf, sizeof(buf));
101        if (i == 0)
102            break;
103        if (i < 0) {
104            if (BIO_should_retry(out)) {
105                fprintf(stderr, "read DELAY\n");
106                sleep(1);
107                continue;
108            }
109            goto err;
110        }
111        fwrite(buf, 1, i, stdout);
112    }
113
114    ret = EXIT_SUCCESS;
115    goto done;
116
117 err:
118    if (ERR_peek_error() == 0) { /* system call error */
119        fprintf(stderr, "errno=%d ", errno);
120        perror("error");
121    } else {
122        ERR_print_errors_fp(stderr);
123    }
124 done:
125    BIO_free_all(out);
126    SSL_CTX_free(ssl_ctx);
127    return ret;
128}
129