Add demo for SSL server using SSL_CONF.

demos/bio/accept.cnf

+# Example configuration file
+# Connects to the default port of s_server
+Port = localhost:4433
+# Disable TLS v1.2 for test.
+# Protocol = ALL, -TLSv1.2
+# Only support 3 curves
+Curves = P-521:P-384:P-256
+ECDHParameters = Automatic
+# Restricted signature algorithms
+SignatureAlgorithms = RSA+SHA512:ECDSA+SHA512 
+Certificate=server.pem
+PrivateKey=server.pem

demos/bio/client-arg.c

@@ -60,6 +60,13 @@ int main(int argc, char **argv)
 			}
 		}
 
+	if (!SSL_CONF_CTX_finish(cctx))
+		{
+		fprintf(stderr, "Finish error\n");
+		ERR_print_errors_fp(stderr);
+		goto err;
+		}
+
 	/* 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.

demos/bio/client-conf.c

@@ -68,6 +68,13 @@ int main(int argc, char **argv)
 			goto end;
 			}
 		}
+
+	if (!SSL_CONF_CTX_finish(cctx))
+		{
+		fprintf(stderr, "Finish error\n");
+		ERR_print_errors_fp(stderr);
+		goto err;
+		}
 			
 	/* We'd normally set some stuff like the verify paths and
 	* mode here because as things stand this will connect to

demos/bio/server-arg.c

+/* 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>
+
+
+int main(int argc, char *argv[])
+	{
+	char *port = "*:4433";
+	BIO *ssl_bio,*tmp;
+	SSL_CTX *ctx;
+	SSL_CONF_CTX *cctx;
+	char buf[512];
+	BIO *in=NULL;
+	int ret=1,i;
+	char **args = argv + 1;
+	int nargs = argc - 1;
+
+	SSL_load_error_strings();
+
+	/* Add ciphers and message digests */
+	OpenSSL_add_ssl_algorithms();
+
+	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_ssl_ctx(cctx, ctx);
+	while(*args && **args == '-')
+		{
+		int rv;
+		/* Parse standard arguments */
+		rv = SSL_CONF_cmd_argv(cctx, &nargs, &args);
+		if (rv == -3)
+			{
+			fprintf(stderr, "Missing argument for %s\n", *args);
+			goto err;
+			}
+		if (rv < 0)
+			{
+			fprintf(stderr, "Error in command %s\n", *args);
+			ERR_print_errors_fp(stderr);
+			goto err;
+			}
+		/* If rv > 0 we processed something so proceed to next arg */
+		if (rv > 0)
+			continue;
+		/* Otherwise application specific argument processing */
+		if (!strcmp(*args, "-port"))
+			{
+			port = args[1];
+			if (port == NULL)
+				{
+				fprintf(stderr, "Missing -port argument\n");
+				goto err;
+				}
+			args += 2;
+			nargs -= 2;
+			continue;
+			}
+		else
+			{
+			fprintf(stderr, "Unknown argument %s\n", *args);
+			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);
+	}
+

demos/bio/server-conf.c

+/* 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);
+	}
+