Demo code for SSL_CONF API

Two example programs one for command line argument processing and one for configuration file processing. (cherry picked from commit 3646578ae7)
2013-02-26 16:33:05 +00:00
parent 1510b1f4c2
commit c46990b13b
5 changed files with 260 additions and 2 deletions
--- a/demos/bio/client-conf.c
+++ b/demos/bio/client-conf.c
@@ -0,0 +1,125 @@
+#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;
+	}
+