122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
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/*
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* Copyright 1998-2017 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (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.
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* It uses blocking.
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* saccept host:port
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* host is the interface IP to use. If any interface, use *:port
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* The default it *:4433
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*
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* cc -I../../include saccept.c -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 <stdlib.h>
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#include <openssl/err.h>
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#include <openssl/ssl.h>
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#define CERT_FILE "server.pem"
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static volatile int done = 0;
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void interrupt(int sig)
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{
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done = 1;
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}
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void sigsetup(void)
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{
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struct sigaction sa;
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/*
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* Catch at most once, and don't restart the accept system call.
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*/
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sa.sa_flags = SA_RESETHAND;
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sa.sa_handler = interrupt;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGINT, &sa, NULL);
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}
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int main(int argc, char *argv[])
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{
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char *port = NULL;
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BIO *in = NULL;
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BIO *ssl_bio, *tmp;
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SSL_CTX *ctx;
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char buf[512];
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int ret = EXIT_FAILURE, i;
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if (argc <= 1)
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port = "*:4433";
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else
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port = argv[1];
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ctx = SSL_CTX_new(TLS_server_method());
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if (!SSL_CTX_use_certificate_chain_file(ctx, CERT_FILE))
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goto err;
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if (!SSL_CTX_use_PrivateKey_file(ctx, CERT_FILE, SSL_FILETYPE_PEM))
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goto err;
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if (!SSL_CTX_check_private_key(ctx))
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goto err;
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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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/* Arrange to leave server loop on interrupt */
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sigsetup();
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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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while (!done) {
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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 = EXIT_SUCCESS;
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err:
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if (ret != EXIT_SUCCESS)
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ERR_print_errors_fp(stderr);
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BIO_free(in);
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return ret;
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}
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