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/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <openssl/base.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "internal.h"
#include "transport_common.h"
static const struct argument kArguments[] = {
{
"-accept", kRequiredArgument,
"The port of the server to bind on; eg 45102",
},
{
"-cipher", kOptionalArgument,
"An OpenSSL-style cipher suite string that configures the offered ciphers",
},
{
"-key", kOptionalArgument,
"Private-key file to use (default is server.pem)",
},
{
"-ocsp-response", kOptionalArgument,
"OCSP response file to send",
},
{
"", kOptionalArgument, "",
},
};
static bool LoadOCSPResponse(SSL_CTX *ctx, const char *filename) {
void *data = NULL;
bool ret = false;
size_t bytes_read;
long length;
FILE *f = fopen(filename, "rb");
if (f == NULL ||
fseek(f, 0, SEEK_END) != 0) {
goto out;
}
length = ftell(f);
if (length < 0) {
goto out;
}
data = malloc(length);
if (data == NULL) {
goto out;
}
rewind(f);
bytes_read = fread(data, 1, length, f);
if (ferror(f) != 0 ||
bytes_read != (size_t)length ||
!SSL_CTX_set_ocsp_response(ctx, (uint8_t*)data, bytes_read)) {
goto out;
}
ret = true;
out:
if (f != NULL) {
fclose(f);
}
free(data);
return ret;
}
bool Server(const std::vector<std::string> &args) {
if (!InitSocketLibrary()) {
return false;
}
std::map<std::string, std::string> args_map;
if (!ParseKeyValueArguments(&args_map, args, kArguments)) {
PrintUsage(kArguments);
return false;
}
SSL_CTX *ctx = SSL_CTX_new(SSLv23_server_method());
SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3);
// Server authentication is required.
std::string key_file = "server.pem";
if (args_map.count("-key") != 0) {
key_file = args_map["-key"];
}
if (SSL_CTX_use_PrivateKey_file(ctx, key_file.c_str(), SSL_FILETYPE_PEM) <= 0) {
fprintf(stderr, "Failed to load private key: %s\n", key_file.c_str());
return false;
}
if (SSL_CTX_use_certificate_chain_file(ctx, key_file.c_str()) != 1) {
fprintf(stderr, "Failed to load cert chain: %s\n", key_file.c_str());
return false;
}
if (args_map.count("-cipher") != 0 &&
!SSL_CTX_set_cipher_list(ctx, args_map["-cipher"].c_str())) {
fprintf(stderr, "Failed setting cipher list\n");
return false;
}
if (args_map.count("-ocsp-response") != 0 &&
!LoadOCSPResponse(ctx, args_map["-ocsp-response"].c_str())) {
fprintf(stderr, "Failed to load OCSP response: %s\n", args_map["-ocsp-response"].c_str());
return false;
}
int sock = -1;
if (!Accept(&sock, args_map["-accept"])) {
return false;
}
BIO *bio = BIO_new_socket(sock, BIO_CLOSE);
SSL *ssl = SSL_new(ctx);
SSL_set_bio(ssl, bio, bio);
int ret = SSL_accept(ssl);
if (ret != 1) {
int ssl_err = SSL_get_error(ssl, ret);
fprintf(stderr, "Error while connecting: %d\n", ssl_err);
ERR_print_errors_cb(PrintErrorCallback, stderr);
return false;
}
fprintf(stderr, "Connected.\n");
PrintConnectionInfo(ssl);
bool ok = TransferData(ssl, sock);
SSL_free(ssl);
SSL_CTX_free(ctx);
return ok;
}
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