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
|
#include <openssl/err.h>
#include <openssl/ssl.h>
#include <openssl/conf.h>
int main(int argc, char **argv)
{
BIO *sbio = NULL, *out = NULL;
int i, len, rv;
char tmpbuf[1024];
SSL_CTX *ctx = NULL;
SSL_CONF_CTX *cctx = NULL;
SSL *ssl = NULL;
CONF *conf = NULL;
STACK_OF(CONF_VALUE) *sect = NULL;
CONF_VALUE *cnf;
const char *connect_str = "localhost:4433";
long errline = -1;
ERR_load_crypto_strings();
ERR_load_SSL_strings();
SSL_library_init();
conf = NCONF_new(NULL);
if (NCONF_load(conf, "connect.cnf", &errline) <= 0)
{
if (errline <= 0)
fprintf(stderr, "Error processing config file\n");
else
fprintf(stderr, "Error on line %ld\n", errline);
goto end;
}
sect = NCONF_get_section(conf, "default");
if (sect == NULL)
{
fprintf(stderr, "Error retrieving default section\n");
goto end;
}
ctx = SSL_CTX_new(SSLv23_client_method());
cctx = SSL_CONF_CTX_new();
SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CLIENT);
SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_FILE);
SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
{
cnf = sk_CONF_VALUE_value(sect, i);
rv = SSL_CONF_cmd(cctx, cnf->name, cnf->value);
if (rv > 0)
continue;
if (rv != -2)
{
fprintf(stderr, "Error processing %s = %s\n",
cnf->name, cnf->value);
ERR_print_errors_fp(stderr);
goto end;
}
if (!strcmp(cnf->name, "Connect"))
{
connect_str = cnf->value;
}
else
{
fprintf(stderr, "Unknown configuration option %s\n",
cnf->name);
goto end;
}
}
/* We'd normally set some stuff like the verify paths and
* mode here because as things stand this will connect to
* any server whose certificate is signed by any CA.
*/
sbio = BIO_new_ssl_connect(ctx);
BIO_get_ssl(sbio, &ssl);
if(!ssl)
{
fprintf(stderr, "Can't locate SSL pointer\n");
goto end;
}
/* Don't want any retries */
SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
/* We might want to do other things with ssl here */
BIO_set_conn_hostname(sbio, connect_str);
out = BIO_new_fp(stdout, BIO_NOCLOSE);
if(BIO_do_connect(sbio) <= 0)
{
fprintf(stderr, "Error connecting to server\n");
ERR_print_errors_fp(stderr);
goto end;
}
if(BIO_do_handshake(sbio) <= 0)
{
fprintf(stderr, "Error establishing SSL connection\n");
ERR_print_errors_fp(stderr);
goto end;
}
/* Could examine ssl here to get connection info */
BIO_puts(sbio, "GET / HTTP/1.0\n\n");
for(;;)
{
len = BIO_read(sbio, tmpbuf, 1024);
if(len <= 0) break;
BIO_write(out, tmpbuf, len);
}
end:
SSL_CONF_CTX_free(cctx);
BIO_free_all(sbio);
BIO_free(out);
NCONF_free(conf);
return 0;
}
|
