2 * Copyright 1998-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
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'
15 * cc -I../../include sconnect.c -L../.. -lssl -lcrypto
22 #include <openssl/err.h>
23 #include <openssl/ssl.h>
25 #define HOSTPORT "localhost:4433"
26 #define CAFILE "root.pem"
28 int main(int argc, char *argv[])
30 const char *hostport = HOSTPORT;
31 const char *CAfile = CAFILE;
35 char buf[1024 * 10], *p;
36 SSL_CTX *ssl_ctx = NULL;
39 int i, len, off, ret = EXIT_FAILURE;
46 hostname = OPENSSL_strdup(hostport);
47 if ((cp = strchr(hostname, ':')) != NULL)
55 ssl_ctx = SSL_CTX_new(TLS_client_method());
57 /* Enable trust chain verification */
58 SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL);
59 SSL_CTX_load_verify_locations(ssl_ctx, CAfile, NULL);
61 /* Lets make a SSL structure */
62 ssl = SSL_new(ssl_ctx);
63 SSL_set_connect_state(ssl);
65 /* Enable peername verification */
66 if (SSL_set1_host(ssl, hostname) <= 0)
69 /* Use it inside an SSL BIO */
70 ssl_bio = BIO_new(BIO_f_ssl());
71 BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
73 /* Lets use a connect BIO under the SSL BIO */
74 out = BIO_new(BIO_s_connect());
75 BIO_set_conn_hostname(out, hostport);
77 out = BIO_push(ssl_bio, out);
79 p = "GET / HTTP/1.0\r\n\r\n";
84 i = BIO_write(out, &(p[off]), len);
86 if (BIO_should_retry(out)) {
87 fprintf(stderr, "write DELAY\n");
101 i = BIO_read(out, buf, sizeof(buf));
105 if (BIO_should_retry(out)) {
106 fprintf(stderr, "read DELAY\n");
112 fwrite(buf, 1, i, stdout);
119 if (ERR_peek_error() == 0) { /* system call error */
120 fprintf(stderr, "errno=%d ", errno);
123 ERR_print_errors_fp(stderr);
127 SSL_CTX_free(ssl_ctx);