+#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;
+ }
+