2 * A minimal program to do SSL to a passed host and port.
3 * It is actually using non-blocking IO but in a very simple manner
4 * sconnect host:port - it does a 'GET / HTTP/1.0'
6 * cc -I../../include sconnect.c -L../.. -lssl -lcrypto
12 #include <openssl/err.h>
13 #include <openssl/ssl.h>
15 #define HOSTPORT "localhost:4433"
16 #define CAFILE "root.pem"
24 const char *hostport = HOSTPORT;
25 const char *CAfile = CAFILE;
29 char buf[1024 * 10], *p;
30 SSL_CTX *ssl_ctx = NULL;
33 int i, len, off, ret = 1;
40 hostname = OPENSSL_strdup(hostport);
41 if ((cp = strchr(hostname, ':')) != NULL)
49 /* Lets get nice error messages */
50 SSL_load_error_strings();
52 /* Setup all the global SSL stuff */
53 OpenSSL_add_ssl_algorithms();
54 ssl_ctx = SSL_CTX_new(TLS_client_method());
56 /* Enable trust chain verification */
57 SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL);
58 SSL_CTX_load_verify_locations(ssl_ctx, CAfile, NULL);
60 /* Lets make a SSL structure */
61 ssl = SSL_new(ssl_ctx);
62 SSL_set_connect_state(ssl);
64 /* Enable peername verification */
65 if (SSL_set1_host(ssl, hostname) <= 0)
68 /* Use it inside an SSL BIO */
69 ssl_bio = BIO_new(BIO_f_ssl());
70 BIO_set_ssl(ssl_bio, ssl, BIO_CLOSE);
72 /* Lets use a connect BIO under the SSL BIO */
73 out = BIO_new(BIO_s_connect());
74 BIO_set_conn_hostname(out, hostport);
76 out = BIO_push(ssl_bio, out);
78 p = "GET / HTTP/1.0\r\n\r\n";
83 i = BIO_write(out, &(p[off]), len);
85 if (BIO_should_retry(out)) {
86 fprintf(stderr, "write DELAY\n");
100 i = BIO_read(out, buf, sizeof(buf));
104 if (BIO_should_retry(out)) {
105 fprintf(stderr, "read DELAY\n");
111 fwrite(buf, 1, i, stdout);
118 if (ERR_peek_error() == 0) { /* system call error */
119 fprintf(stderr, "errno=%d ", errno);
122 ERR_print_errors_fp(stderr);
125 SSL_CTX_free(ssl_ctx);