Add demo for SSL server using SSL_CONF.

2013-10-18 16:28:38 +01:00
parent ec2f7e568e
commit ebd14bfce9
5 changed files with 304 additions and 0 deletions
--- a/demos/bio/server-conf.c
+++ b/demos/bio/server-conf.c
@@ -0,0 +1,143 @@
+/* NOCW */
+/* demos/bio/saccept.c */
+
+/* A minimal program to server an SSL connection.
+ * It uses blocking.
+ * saccept host:port
+ * host is the interface IP to use.  If any interface, use *:port
+ * The default it *:4433
+ *
+ * cc -I../../include saccept.c -L../.. -lssl -lcrypto
+ */
+
+#include <stdio.h>
+#include <signal.h>
+#include <openssl/err.h>
+#include <openssl/ssl.h>
+#include <openssl/conf.h>
+
+int main(int argc, char *argv[])
+	{
+	char *port = "*:4433";
+	BIO *in=NULL;
+	BIO *ssl_bio,*tmp;
+	SSL_CTX *ctx;
+	SSL_CONF_CTX *cctx = NULL;
+	CONF *conf = NULL;
+	STACK_OF(CONF_VALUE) *sect = NULL;
+	CONF_VALUE *cnf;
+	long errline = -1;
+	char buf[512];
+	int ret=1,i;
+
+	SSL_load_error_strings();
+
+	/* Add ciphers and message digests */
+	OpenSSL_add_ssl_algorithms();
+
+	conf = NCONF_new(NULL);
+
+	if (NCONF_load(conf, "accept.cnf", &errline) <= 0)
+		{
+		if (errline <= 0)
+			fprintf(stderr, "Error processing config file\n");
+		else
+			fprintf(stderr, "Error on line %ld\n", errline);
+		goto err;
+		}
+
+	sect = NCONF_get_section(conf, "default");
+
+	if (sect == NULL)
+		{
+		fprintf(stderr, "Error retrieving default section\n");
+		goto err;
+		}
+
+	ctx=SSL_CTX_new(SSLv23_server_method());
+	cctx = SSL_CONF_CTX_new();
+	SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_SERVER);
+	SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CERTIFICATE);
+	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++)
+		{
+		int rv;
+		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 err;
+			}
+		if (!strcmp(cnf->name, "Port"))
+			{
+			port = cnf->value;
+			}
+		else
+			{
+			fprintf(stderr, "Unknown configuration option %s\n",
+							cnf->name);
+			goto err;
+			}
+		}
+
+	if (!SSL_CONF_CTX_finish(cctx))
+		{
+		fprintf(stderr, "Finish error\n");
+		ERR_print_errors_fp(stderr);
+		goto err;
+		}
+
+	/* Setup server side SSL bio */
+	ssl_bio=BIO_new_ssl(ctx,0);
+
+	if ((in=BIO_new_accept(port)) == NULL) goto err;
+
+	/* This means that when a new connection is acceptede on 'in',
+	 * The ssl_bio will be 'dupilcated' and have the new socket
+	 * BIO push into it.  Basically it means the SSL BIO will be
+	 * automatically setup */
+	BIO_set_accept_bios(in,ssl_bio);
+
+again:
+	/* The first call will setup the accept socket, and the second
+	 * will get a socket.  In this loop, the first actual accept
+	 * will occur in the BIO_read() function. */
+
+	if (BIO_do_accept(in) <= 0) goto err;
+
+	for (;;)
+		{
+		i=BIO_read(in,buf,512);
+		if (i == 0)
+			{
+			/* If we have finished, remove the underlying
+			 * BIO stack so the next time we call any function
+			 * for this BIO, it will attempt to do an
+			 * accept */
+			printf("Done\n");
+			tmp=BIO_pop(in);
+			BIO_free_all(tmp);
+			goto again;
+			}
+		if (i < 0) goto err;
+		fwrite(buf,1,i,stdout);
+		fflush(stdout);
+		}
+
+	ret=0;
+err:
+	if (ret)
+		{
+		ERR_print_errors_fp(stderr);
+		}
+	if (in != NULL) BIO_free(in);
+	exit(ret);
+	return(!ret);
+	}
+