149 lines
4.1 KiB
C
149 lines
4.1 KiB
C
/*
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* Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* A minimal program to serve an SSL connection. It uses blocking. It use the
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* SSL_CONF API with the command line. cc -I../../include server-arg.c
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* -L../.. -lssl -lcrypto -ldl
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <openssl/err.h>
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#include <openssl/ssl.h>
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int main(int argc, char *argv[])
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{
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char *port = "*:4433";
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BIO *ssl_bio, *tmp;
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SSL_CTX *ctx;
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SSL_CONF_CTX *cctx;
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char buf[512];
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BIO *in = NULL;
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int ret = 1, i;
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char **args = argv + 1;
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int nargs = argc - 1;
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SSL_load_error_strings();
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/* Add ciphers and message digests */
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OpenSSL_add_ssl_algorithms();
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ctx = SSL_CTX_new(TLS_server_method());
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cctx = SSL_CONF_CTX_new();
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SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_SERVER);
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SSL_CONF_CTX_set_flags(cctx, SSL_CONF_FLAG_CERTIFICATE);
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SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
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while (*args && **args == '-') {
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int rv;
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/* Parse standard arguments */
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rv = SSL_CONF_cmd_argv(cctx, &nargs, &args);
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if (rv == -3) {
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fprintf(stderr, "Missing argument for %s\n", *args);
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goto err;
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}
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if (rv < 0) {
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fprintf(stderr, "Error in command %s\n", *args);
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ERR_print_errors_fp(stderr);
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goto err;
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}
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/* If rv > 0 we processed something so proceed to next arg */
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if (rv > 0)
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continue;
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/* Otherwise application specific argument processing */
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if (strcmp(*args, "-port") == 0) {
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port = args[1];
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if (port == NULL) {
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fprintf(stderr, "Missing -port argument\n");
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goto err;
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}
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args += 2;
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nargs -= 2;
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continue;
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} else {
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fprintf(stderr, "Unknown argument %s\n", *args);
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goto err;
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}
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}
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if (!SSL_CONF_CTX_finish(cctx)) {
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fprintf(stderr, "Finish error\n");
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ERR_print_errors_fp(stderr);
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goto err;
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}
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#ifdef ITERATE_CERTS
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/*
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* Demo of how to iterate over all certificates in an SSL_CTX structure.
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*/
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{
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X509 *x;
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int rv;
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rv = SSL_CTX_set_current_cert(ctx, SSL_CERT_SET_FIRST);
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while (rv) {
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X509 *x = SSL_CTX_get0_certificate(ctx);
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X509_NAME_print_ex_fp(stdout, X509_get_subject_name(x), 0,
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XN_FLAG_ONELINE);
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printf("\n");
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rv = SSL_CTX_set_current_cert(ctx, SSL_CERT_SET_NEXT);
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}
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fflush(stdout);
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}
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#endif
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/* Setup server side SSL bio */
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ssl_bio = BIO_new_ssl(ctx, 0);
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if ((in = BIO_new_accept(port)) == NULL)
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goto err;
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/*
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* This means that when a new connection is accepted on 'in', The ssl_bio
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* will be 'duplicated' and have the new socket BIO push into it.
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* Basically it means the SSL BIO will be automatically setup
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*/
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BIO_set_accept_bios(in, ssl_bio);
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again:
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/*
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* The first call will setup the accept socket, and the second will get a
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* socket. In this loop, the first actual accept will occur in the
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* BIO_read() function.
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*/
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if (BIO_do_accept(in) <= 0)
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goto err;
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for (;;) {
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i = BIO_read(in, buf, 512);
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if (i == 0) {
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/*
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* If we have finished, remove the underlying BIO stack so the
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* next time we call any function for this BIO, it will attempt
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* to do an accept
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*/
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printf("Done\n");
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tmp = BIO_pop(in);
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BIO_free_all(tmp);
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goto again;
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}
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if (i < 0)
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goto err;
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fwrite(buf, 1, i, stdout);
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fflush(stdout);
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}
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ret = 0;
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err:
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if (ret) {
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ERR_print_errors_fp(stderr);
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}
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BIO_free(in);
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exit(ret);
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return (!ret);
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}
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