1#include <openssl/err.h>
2#include <openssl/ssl.h>
3#include <openssl/conf.h>
4
5int main(int argc, char **argv)
6{
7    BIO *sbio = NULL, *out = NULL;
8    int i, len, rv;
9    char tmpbuf[1024];
10    SSL_CTX *ctx = NULL;
11    SSL_CONF_CTX *cctx = NULL;
12    SSL *ssl = NULL;
13    CONF *conf = NULL;
14    STACK_OF(CONF_VALUE) *sect = NULL;
15    CONF_VALUE *cnf;
16    const char *connect_str = "localhost:4433";
17    long errline = -1;
18
19    ERR_load_crypto_strings();
20    ERR_load_SSL_strings();
21    SSL_library_init();
22
23    conf = NCONF_new(NULL);
24
25    if (NCONF_load(conf, "connect.cnf", &errline) <= 0) {
26        if (errline <= 0)
27            fprintf(stderr, "Error processing config file\n");
28        else
29            fprintf(stderr, "Error on line %ld\n", errline);
30        goto end;
31    }
32
33    sect = NCONF_get_section(conf, "default");
34
35    if (sect == NULL) {
36        fprintf(stderr, "Error retrieving default section\n");
37        goto end;
38    }
39
40    ctx = SSL_CTX_new(SSLv23_client_method());
41    cctx = SSL_CONF_CTX_new();
42    SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT);
43    SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE);
44    SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
45    for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
46        cnf = sk_CONF_VALUE_value(sect, i);
47        rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value);
48        if (rv > 0)
49            continue;
50        if (rv != -2) {
51            fprintf(stderr, "Error processing %s = %s\n",
52                    cnf->name, cnf->value);
53            ERR_print_errors_fp(stderr);
54            goto end;
55        }
56        if (!strcmp(cnf->name, "Connect")) {
57            connect_str = cnf->value;
58        } else {
59            fprintf(stderr, "Unknown configuration option %s\n", cnf->name);
60            goto end;
61        }
62    }
63
64    if (!SSL_CONF_CTX_finish(cctx)) {
65        fprintf(stderr, "Finish error\n");
66        ERR_print_errors_fp(stderr);
67        goto err;
68    }
69
70    /*
71     * We'd normally set some stuff like the verify paths and * mode here
72     * because as things stand this will connect to * any server whose
73     * certificate is signed by any CA.
74     */
75
76    sbio = BIO_new_ssl_connect(ctx);
77
78    BIO_get_ssl(sbio, &ssl);
79
80    if (!ssl) {
81        fprintf(stderr, "Can't locate SSL pointer\n");
82        goto end;
83    }
84
85    /* Don't want any retries */
86    SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
87
88    /* We might want to do other things with ssl here */
89
90    BIO_set_conn_hostname(sbio, connect_str);
91
92    out = BIO_new_fp(stdout, BIO_NOCLOSE);
93    if (BIO_do_connect(sbio) <= 0) {
94        fprintf(stderr, "Error connecting to server\n");
95        ERR_print_errors_fp(stderr);
96        goto end;
97    }
98
99    if (BIO_do_handshake(sbio) <= 0) {
100        fprintf(stderr, "Error establishing SSL connection\n");
101        ERR_print_errors_fp(stderr);
102        goto end;
103    }
104
105    /* Could examine ssl here to get connection info */
106
107    BIO_puts(sbio, "GET / HTTP/1.0\n\n");
108    for (;;) {
109        len = BIO_read(sbio, tmpbuf, 1024);
110        if (len <= 0)
111            break;
112        BIO_write(out, tmpbuf, len);
113    }
114 end:
115    SSL_CONF_CTX_free(cctx);
116    BIO_free_all(sbio);
117    BIO_free(out);
118    NCONF_free(conf);
119    return 0;
120}
121