1 /*
2  * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
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
8  */
9 
10 #include <string.h>
11 #include <openssl/err.h>
12 #include <openssl/ssl.h>
13 #include <openssl/conf.h>
14 
15 int main(int argc, char **argv)
16 {
17     BIO *sbio = NULL, *out = NULL;
18     int i, len, rv;
19     char tmpbuf[1024];
20     SSL_CTX *ctx = NULL;
21     SSL_CONF_CTX *cctx = NULL;
22     SSL *ssl = NULL;
23     CONF *conf = NULL;
24     STACK_OF(CONF_VALUE) *sect = NULL;
25     CONF_VALUE *cnf;
26     const char *connect_str = "localhost:4433";
27     long errline = -1;
28 
29     conf = NCONF_new(NULL);
30 
31     if (NCONF_load(conf, "connect.cnf", &errline) <= 0) {
32         if (errline <= 0)
33             fprintf(stderr, "Error processing config file\n");
34         else
35             fprintf(stderr, "Error on line %ld\n", errline);
36         goto end;
37     }
38 
39     sect = NCONF_get_section(conf, "default");
40 
41     if (sect == NULL) {
42         fprintf(stderr, "Error retrieving default section\n");
43         goto end;
44     }
45 
46     ctx = SSL_CTX_new(TLS_client_method());
47     cctx = SSL_CONF_CTX_new();
48     SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT);
49     SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE);
50     SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
51     for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
52         cnf = sk_CONF_VALUE_value(sect, i);
53         rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value);
54         if (rv > 0)
55             continue;
56         if (rv != -2) {
57             fprintf(stderr, "Error processing %s = %s\n",
58                     cnf->name, cnf->value);
59             ERR_print_errors_fp(stderr);
60             goto end;
61         }
62         if (strcmp(cnf->name, "Connect") == 0) {
63             connect_str = cnf->value;
64         } else {
65             fprintf(stderr, "Unknown configuration option %s\n", cnf->name);
66             goto end;
67         }
68     }
69 
70     if (!SSL_CONF_CTX_finish(cctx)) {
71         fprintf(stderr, "Finish error\n");
72         ERR_print_errors_fp(stderr);
73         goto end;
74     }
75 
76     /*
77      * We'd normally set some stuff like the verify paths and * mode here
78      * because as things stand this will connect to * any server whose
79      * certificate is signed by any CA.
80      */
81 
82     sbio = BIO_new_ssl_connect(ctx);
83 
84     BIO_get_ssl(sbio, &ssl);
85 
86     if (!ssl) {
87         fprintf(stderr, "Can't locate SSL pointer\n");
88         goto end;
89     }
90 
91     /* Don't want any retries */
92     SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
93 
94     /* We might want to do other things with ssl here */
95 
96     BIO_set_conn_hostname(sbio, connect_str);
97 
98     out = BIO_new_fp(stdout, BIO_NOCLOSE);
99     if (BIO_do_connect(sbio) <= 0) {
100         fprintf(stderr, "Error connecting to server\n");
101         ERR_print_errors_fp(stderr);
102         goto end;
103     }
104 
105     if (BIO_do_handshake(sbio) <= 0) {
106         fprintf(stderr, "Error establishing SSL connection\n");
107         ERR_print_errors_fp(stderr);
108         goto end;
109     }
110 
111     /* Could examine ssl here to get connection info */
112 
113     BIO_puts(sbio, "GET / HTTP/1.0\n\n");
114     for (;;) {
115         len = BIO_read(sbio, tmpbuf, 1024);
116         if (len <= 0)
117             break;
118         BIO_write(out, tmpbuf, len);
119     }
120  end:
121     SSL_CONF_CTX_free(cctx);
122     BIO_free_all(sbio);
123     BIO_free(out);
124     NCONF_free(conf);
125     return 0;
126 }
127