2 * Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * A minimal program to serve an SSL connection. It uses blocking. It use the
12 * SSL_CONF API with the command line. cc -I../../include server-arg.c
13 * -L../.. -lssl -lcrypto -ldl
18 #include <openssl/err.h>
19 #include <openssl/ssl.h>
21 int main(int argc, char *argv[])
23 char *port = "*:4433";
30 char **args = argv + 1;
33 SSL_load_error_strings();
35 /* Add ciphers and message digests */
36 OpenSSL_add_ssl_algorithms();
38 ctx = SSL_CTX_new(TLS_server_method());
40 cctx = SSL_CONF_CTX_new();
41 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_SERVER);
42 SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CERTIFICATE);
43 SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
44 while (*args && **args == '-') {
46 /* Parse standard arguments */
47 rv = SSL_CONF_cmd_argv(cctx, &nargs, &args);
49 fprintf(stderr, "Missing argument for %s\n", *args);
53 fprintf(stderr, "Error in command %s\n", *args);
54 ERR_print_errors_fp(stderr);
57 /* If rv > 0 we processed something so proceed to next arg */
60 /* Otherwise application specific argument processing */
61 if (strcmp(*args, "-port") == 0) {
64 fprintf(stderr, "Missing -port argument\n");
71 fprintf(stderr, "Unknown argument %s\n", *args);
76 if (!SSL_CONF_CTX_finish(cctx)) {
77 fprintf(stderr, "Finish error\n");
78 ERR_print_errors_fp(stderr);
83 * Demo of how to iterate over all certificates in an SSL_CTX structure.
88 rv = SSL_CTX_set_current_cert(ctx, SSL_CERT_SET_FIRST);
90 X509 *x = SSL_CTX_get0_certificate(ctx);
91 X509_NAME_print_ex_fp(stdout, X509_get_subject_name(x), 0,
94 rv = SSL_CTX_set_current_cert(ctx, SSL_CERT_SET_NEXT);
99 /* Setup server side SSL bio */
100 ssl_bio = BIO_new_ssl(ctx, 0);
102 if ((in = BIO_new_accept(port)) == NULL)
106 * This means that when a new connection is accepted on 'in', The ssl_bio
107 * will be 'duplicated' and have the new socket BIO push into it.
108 * Basically it means the SSL BIO will be automatically setup
110 BIO_set_accept_bios(in, ssl_bio);
114 * The first call will setup the accept socket, and the second will get a
115 * socket. In this loop, the first actual accept will occur in the
116 * BIO_read() function.
119 if (BIO_do_accept(in) <= 0)
123 i = BIO_read(in, buf, 512);
126 * If we have finished, remove the underlying BIO stack so the
127 * next time we call any function for this BIO, it will attempt
137 fwrite(buf, 1, i, stdout);
144 ERR_print_errors_fp(stderr);