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|
/*
* Copyright (C) 2001,2002 Paul Sheer
* Portions Copyright (C) 2002,2003 Nikos Mavroyanopoulos
* Copyright (C) 2004 Free Software Foundation
*
* This file is part of GNUTLS.
*
* GNUTLS is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNUTLS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* This server is heavily modified for GNUTLS by Nikos Mavroyanopoulos
* (which means it is quite unreadable)
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include <gnutls/extra.h>
#include "common.h"
#include "serv-gaa.h"
#include <sys/time.h>
#include <fcntl.h>
#include <config.h>
#include <list.h>
/* konqueror cannot handle sending the page in multiple
* pieces.
*/
/* global stuff */
static int generate = 0;
static int http = 0;
static int port = 0;
static int x509ctype;
static int debug;
int verbose;
static int nodb;
char *srp_passwd;
char *srp_passwd_conf;
char *pgp_keyring;
char *pgp_trustdb;
char *pgp_keyfile;
char *pgp_certfile;
char *x509_keyfile;
char *x509_certfile;
char *x509_dsakeyfile;
char *x509_dsacertfile;
char *x509_cafile;
char *dh_params_file;
char *x509_crlfile = NULL;
/* end of globals */
/* This is a sample TCP echo server.
* This will behave as an http server if any argument in the
* command line is present
*/
#define SMALL_READ_TEST (2147483647)
#define SA struct sockaddr
#define ERR(err,s) if(err==-1) {perror(s);return(1);}
#define GERR(ret) fprintf(stdout, "Error: %s\n", safe_strerror(ret))
#define MAX_BUF 1024
#undef max
#define max(x,y) ((x) > (y) ? (x) : (y))
#undef min
#define min(x,y) ((x) < (y) ? (x) : (y))
#define HTTP_END "</BODY></HTML>\n\n"
#define HTTP_UNIMPLEMENTED "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n<HTML><HEAD>\r\n<TITLE>501 Method Not Implemented</TITLE>\r\n</HEAD><BODY>\r\n<H1>Method Not Implemented</H1>\r\n<HR>\r\n</BODY></HTML>\r\n"
#define HTTP_OK "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
#define HTTP_BEGIN HTTP_OK \
"\n" \
"<HTML><BODY>\n" \
"<CENTER><H1>This is <a href=\"http://www.gnu.org/software/gnutls\">" \
"GNUTLS</a></H1></CENTER>\n\n"
#define RENEGOTIATE
/* These are global */
gnutls_srp_server_credentials srp_cred = NULL;
gnutls_anon_server_credentials dh_cred = NULL;
gnutls_certificate_credentials cert_cred = NULL;
const int ssl_session_cache = 128;
static void wrap_db_init(void);
static void wrap_db_deinit(void);
static int wrap_db_store(void *dbf, gnutls_datum key, gnutls_datum data);
static gnutls_datum wrap_db_fetch(void *dbf, gnutls_datum key);
static int wrap_db_delete(void *dbf, gnutls_datum key);
#define HTTP_STATE_REQUEST 1
#define HTTP_STATE_RESPONSE 2
#define HTTP_STATE_CLOSING 3
LIST_TYPE_DECLARE(listener_item, char *http_request; char *http_response;
int request_length;
int response_length;
int response_written; int http_state; int fd;
gnutls_session tls_session;
int handshake_ok;
);
static const char *safe_strerror(int value)
{
const char *ret = gnutls_strerror(value);
if (ret == NULL)
ret = str_unknown;
return ret;
}
static void listener_free(listener_item * j)
{
if (j->http_request)
free(j->http_request);
if (j->http_response)
free(j->http_response);
if (j->fd >= 0) {
gnutls_bye(j->tls_session, GNUTLS_SHUT_WR);
shutdown(j->fd, 2);
close(j->fd);
gnutls_deinit(j->tls_session);
}
}
/* we use primes up to 1024 in this server.
* otherwise we should add them here.
*/
gnutls_dh_params dh_params = NULL;
gnutls_rsa_params rsa_params = NULL;
static int generate_dh_primes(void)
{
int prime_bits = 768;
if (gnutls_dh_params_init(&dh_params) < 0) {
fprintf(stderr, "Error in dh parameter initialization\n");
exit(1);
}
/* Generate Diffie Hellman parameters - for use with DHE
* kx algorithms. These should be discarded and regenerated
* once a day, once a week or once a month. Depends on the
* security requirements.
*/
printf
("Generating Diffie Hellman parameters [%d]. Please wait...\n",
prime_bits);
fflush(stdout);
if (gnutls_dh_params_generate2(dh_params, prime_bits) < 0) {
fprintf(stderr, "Error in prime generation\n");
exit(1);
}
return 0;
}
static void read_dh_params(void)
{
char tmpdata[2048];
int size;
gnutls_datum params;
FILE *fd;
if (gnutls_dh_params_init(&dh_params) < 0) {
fprintf(stderr, "Error in dh parameter initialization\n");
exit(1);
}
/* read the params file
*/
fd = fopen(dh_params_file, "r");
if (fd == NULL) {
fprintf(stderr, "Could not open %s\n", dh_params_file);
exit(1);
}
size = fread(tmpdata, 1, sizeof(tmpdata) - 1, fd);
tmpdata[size] = 0;
fclose(fd);
params.data = tmpdata;
params.size = size;
size =
gnutls_dh_params_import_pkcs3(dh_params, ¶ms,
GNUTLS_X509_FMT_PEM);
if (size < 0) {
fprintf(stderr, "Error parsing dh params: %s\n",
safe_strerror(size));
exit(1);
}
printf("Read Diffie Hellman parameters.\n");
fflush(stdout);
}
static int get_params(gnutls_session session, gnutls_params_type type,
gnutls_params_st * st)
{
if (type == GNUTLS_PARAMS_RSA_EXPORT)
st->params.rsa_export = rsa_params;
else if (type == GNUTLS_PARAMS_DH)
st->params.dh = dh_params;
else
return -1;
st->type = type;
st->deinit = 0;
return 0;
}
static int generate_rsa_params(void)
{
if (gnutls_rsa_params_init(&rsa_params) < 0) {
fprintf(stderr, "Error in rsa parameter initialization\n");
exit(1);
}
/* Generate RSA parameters - for use with RSA-export
* cipher suites. These should be discarded and regenerated
* once a day, once every 500 transactions etc. Depends on the
* security requirements.
*/
printf("Generating temporary RSA parameters. Please wait...\n");
fflush(stdout);
if (gnutls_rsa_params_generate2(rsa_params, 512) < 0) {
fprintf(stderr, "Error in rsa parameter generation\n");
exit(1);
}
return 0;
}
int protocol_priority[PRI_MAX] =
{ GNUTLS_TLS1_1, GNUTLS_TLS1, GNUTLS_SSL3, 0 };
int kx_priority[PRI_MAX] =
{ GNUTLS_KX_DHE_DSS, GNUTLS_KX_RSA, GNUTLS_KX_DHE_RSA, GNUTLS_KX_SRP,
/* Do not use anonymous authentication, unless you know what that means */
GNUTLS_KX_SRP_DSS, GNUTLS_KX_SRP_RSA, GNUTLS_KX_ANON_DH,
GNUTLS_KX_RSA_EXPORT, 0
};
int cipher_priority[PRI_MAX] =
{ GNUTLS_CIPHER_AES_128_CBC, GNUTLS_CIPHER_3DES_CBC,
GNUTLS_CIPHER_ARCFOUR_128, GNUTLS_CIPHER_ARCFOUR_40, 0
};
int comp_priority[PRI_MAX] =
{ GNUTLS_COMP_ZLIB, GNUTLS_COMP_LZO, GNUTLS_COMP_NULL, 0 };
int mac_priority[PRI_MAX] =
{ GNUTLS_MAC_SHA, GNUTLS_MAC_MD5, GNUTLS_MAC_RMD160, 0 };
int cert_type_priority[PRI_MAX] =
{ GNUTLS_CRT_X509, GNUTLS_CRT_OPENPGP, 0 };
LIST_DECLARE_INIT(listener_list, listener_item, listener_free);
gnutls_session initialize_session(void)
{
gnutls_session session;
gnutls_init(&session, GNUTLS_SERVER);
/* allow the use of private ciphersuites.
*/
gnutls_handshake_set_private_extensions(session, 1);
if (nodb == 0) {
gnutls_db_set_retrieve_function(session, wrap_db_fetch);
gnutls_db_set_remove_function(session, wrap_db_delete);
gnutls_db_set_store_function(session, wrap_db_store);
gnutls_db_set_ptr(session, NULL);
}
/* gnutls_dh_set_prime_bits( session, prime_bits); */
gnutls_cipher_set_priority(session, cipher_priority);
gnutls_compression_set_priority(session, comp_priority);
gnutls_kx_set_priority(session, kx_priority);
gnutls_protocol_set_priority(session, protocol_priority);
gnutls_mac_set_priority(session, mac_priority);
gnutls_certificate_type_set_priority(session, cert_type_priority);
gnutls_credentials_set(session, GNUTLS_CRD_ANON, dh_cred);
if (srp_cred != NULL)
gnutls_credentials_set(session, GNUTLS_CRD_SRP, srp_cred);
if (cert_cred != NULL)
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, cert_cred);
gnutls_certificate_server_set_request(session, GNUTLS_CERT_REQUEST);
return session;
}
static const char DEFAULT_DATA[] = "This is the default message reported "
"by GnuTLS TLS version 1.0 implementation. For more information "
"please visit http://www.gnutls.org or even http://www.gnu.org/software/gnutls.";
/* Creates html with the current session information.
*/
#define tmp2 &http_buffer[strlen(http_buffer)]
char *peer_print_info(gnutls_session session, int *ret_length,
const char *header)
{
const char *tmp;
unsigned char sesid[32];
int sesid_size, i;
char *http_buffer = malloc(5 * 1024 + strlen(header));
gnutls_kx_algorithm kx_alg;
if (http_buffer == NULL)
return NULL;
if (verbose != 0) {
strcpy(http_buffer, HTTP_BEGIN);
strcpy(&http_buffer[sizeof(HTTP_BEGIN) - 1], DEFAULT_DATA);
strcpy(&http_buffer[sizeof(HTTP_BEGIN) + sizeof(DEFAULT_DATA) - 2],
HTTP_END);
*ret_length =
sizeof(DEFAULT_DATA) + sizeof(HTTP_BEGIN) + sizeof(HTTP_END) -
3;
return http_buffer;
}
strcpy(http_buffer, HTTP_BEGIN);
/* print session_id */
gnutls_session_get_id(session, sesid, &sesid_size);
sprintf(tmp2, "\n<p>Session ID: <i>");
for (i = 0; i < sesid_size; i++)
sprintf(tmp2, "%.2X", sesid[i]);
sprintf(tmp2, "</i></p>\n");
sprintf(tmp2,
"<h5>If your browser supports session resuming, then you should see the "
"same session ID, when you press the <b>reload</b> button.</h5>\n");
/* Here unlike print_info() we use the kx algorithm to distinguish
* the functions to call.
*/
{
char dns[256];
size_t dns_size = sizeof(dns);
unsigned int type;
if (gnutls_server_name_get(session, dns, &dns_size, &type, 0) == 0) {
sprintf(tmp2, "\n<p>Server Name: %s</p>\n", dns);
}
}
kx_alg = gnutls_kx_get(session);
/* print srp specific data */
#ifdef ENABLE_SRP
if (kx_alg == GNUTLS_KX_SRP) {
sprintf(tmp2, "<p>Connected as user '%s'.</p>\n",
gnutls_srp_server_get_username(session));
}
#endif
#ifdef ENABLE_ANON
if (kx_alg == GNUTLS_KX_ANON_DH) {
sprintf(tmp2,
"<p> Connect using anonymous DH (prime of %d bits)</p>\n",
gnutls_dh_get_prime_bits(session));
}
#endif
if (kx_alg == GNUTLS_KX_DHE_RSA || kx_alg == GNUTLS_KX_DHE_DSS) {
sprintf(tmp2,
"Ephemeral DH using prime of <b>%d</b> bits.<br>\n",
gnutls_dh_get_prime_bits(session));
}
/* print session information */
strcat(http_buffer, "<P>\n");
tmp = gnutls_protocol_get_name(gnutls_protocol_get_version(session));
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2,
"<TABLE border=1><TR><TD>Protocol version:</TD><TD>%s</TD></TR>\n",
tmp);
if (gnutls_auth_get_type(session) == GNUTLS_CRD_CERTIFICATE) {
tmp =
gnutls_certificate_type_get_name(gnutls_certificate_type_get
(session));
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2, "<TR><TD>Certificate Type:</TD><TD>%s</TD></TR>\n",
tmp);
}
tmp = gnutls_kx_get_name(kx_alg);
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2, "<TR><TD>Key Exchange:</TD><TD>%s</TD></TR>\n", tmp);
tmp = gnutls_compression_get_name(gnutls_compression_get(session));
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2, "<TR><TD>Compression</TD><TD>%s</TD></TR>\n", tmp);
tmp = gnutls_cipher_get_name(gnutls_cipher_get(session));
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2, "<TR><TD>Cipher</TD><TD>%s</TD></TR>\n", tmp);
tmp = gnutls_mac_get_name(gnutls_mac_get(session));
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2, "<TR><TD>MAC</TD><TD>%s</TD></TR>\n", tmp);
tmp = gnutls_cipher_suite_get_name(kx_alg,
gnutls_cipher_get(session),
gnutls_mac_get(session));
if (tmp == NULL)
tmp = str_unknown;
sprintf(tmp2, "<TR><TD>Ciphersuite</TD><TD>%s</TD></TR></p></TABLE>\n",
tmp);
strcat(http_buffer, "<hr><P>Your header was:<PRE>");
strcat(http_buffer, header);
strcat(http_buffer, "</PRE></P>");
strcat(http_buffer, "\n" HTTP_END);
*ret_length = strlen(http_buffer);
return http_buffer;
}
static int listen_socket(const char *name, int listen_port)
{
struct sockaddr_in a;
int s;
int yes;
if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket() failed");
return -1;
}
yes = 1;
if (setsockopt
(s, SOL_SOCKET, SO_REUSEADDR, (const void *) &yes, sizeof(yes))
< 0) {
perror("setsockopt() failed");
failed:
close(s);
return -1;
}
memset(&a, 0, sizeof(a));
a.sin_port = htons(listen_port);
a.sin_family = AF_INET;
if (bind(s, (struct sockaddr *) &a, sizeof(a)) < 0) {
perror("bind() failed");
goto failed;
}
if (listen(s, 10) < 0) {
perror("listen() failed");
goto failed;
}
printf("%s ready. Listening to port '%d'.\n\n", name, listen_port);
return s;
}
static void get_response(gnutls_session session, char *request,
char **response, int *response_length)
{
char *p, *h;
if (http != 0) {
if (strncmp(request, "GET ", 4))
goto unimplemented;
if (!(h = strchr(request, '\n')))
goto unimplemented;
*h++ = '\0';
while (*h == '\r' || *h == '\n')
h++;
if (!(p = strchr(request + 4, ' ')))
goto unimplemented;
*p = '\0';
}
/* *response = peer_print_info(session, request+4, h, response_length); */
if (http != 0) {
*response = peer_print_info(session, response_length, h);
} else {
*response = strdup(request);
*response_length = ((*response) ? strlen(*response) : 0);
}
return;
unimplemented:
*response = strdup(HTTP_UNIMPLEMENTED);
*response_length = ((*response) ? strlen(*response) : 0);
}
void terminate(int sig)
{
fprintf(stderr, "Exiting via signal %d\n", sig);
exit(1);
}
static void check_alert(gnutls_session session, int ret)
{
if (ret == GNUTLS_E_WARNING_ALERT_RECEIVED
|| ret == GNUTLS_E_FATAL_ALERT_RECEIVED) {
int last_alert = gnutls_alert_get(session);
if (last_alert == GNUTLS_A_NO_RENEGOTIATION &&
ret == GNUTLS_E_WARNING_ALERT_RECEIVED)
printf
("* Received NO_RENEGOTIATION alert. Client does not support renegotiation.\n");
else
printf("* Received alert '%d': %s.\n", last_alert,
gnutls_alert_get_name(last_alert));
}
}
static void tls_log_func(int level, const char *str)
{
fprintf(stderr, "|<%d>| %s", level, str);
}
static void gaa_parser(int argc, char **argv);
int main(int argc, char **argv)
{
int ret, n, h;
char topbuf[512];
char name[256];
int accept_fd;
struct sockaddr_in client_address;
#ifndef _WIN32
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
signal(SIGTERM, terminate);
if (signal(SIGINT, terminate) == SIG_IGN)
signal(SIGINT, SIG_IGN); /* e.g. background process */
#endif
sockets_init();
gaa_parser(argc, argv);
if (nodb == 0)
wrap_db_init();
if (http == 1) {
strcpy(name, "HTTP Server");
} else {
strcpy(name, "Echo Server");
}
if ((ret = gnutls_global_init()) < 0) {
fprintf(stderr, "global_init: %s\n", gnutls_strerror(ret));
exit(1);
}
gnutls_global_set_log_function(tls_log_func);
gnutls_global_set_log_level(debug);
if ((ret = gnutls_global_init_extra()) < 0) {
fprintf(stderr, "global_init_extra: %s\n", gnutls_strerror(ret));
exit(1);
}
/* Note that servers must generate parameters for
* Diffie Hellman. See gnutls_dh_params_generate(), and
* gnutls_dh_params_set().
*/
if (generate != 0) {
generate_rsa_params();
generate_dh_primes();
}
if (dh_params_file) {
read_dh_params();
}
if (gnutls_certificate_allocate_credentials(&cert_cred) < 0) {
fprintf(stderr, "memory error\n");
exit(1);
}
if (x509_cafile != NULL) {
if ((ret = gnutls_certificate_set_x509_trust_file
(cert_cred, x509_cafile, x509ctype)) < 0) {
fprintf(stderr, "Error reading '%s'\n", x509_cafile);
GERR(ret);
exit(1);
} else {
printf("Processed %d CA certificate(s).\n", ret);
}
}
#ifdef ENABLE_PKI
if (x509_crlfile != NULL) {
if ((ret = gnutls_certificate_set_x509_crl_file
(cert_cred, x509_crlfile, x509ctype)) < 0) {
fprintf(stderr, "Error reading '%s'\n", x509_crlfile);
GERR(ret);
exit(1);
} else {
printf("Processed %d CRL(s).\n", ret);
}
}
#endif
#ifdef USE_OPENPGP
if (pgp_keyring != NULL) {
ret =
gnutls_certificate_set_openpgp_keyring_file(cert_cred,
pgp_keyring);
if (ret < 0) {
fprintf(stderr, "Error setting the OpenPGP keyring file\n");
GERR(ret);
}
}
if (pgp_trustdb != NULL) {
ret =
gnutls_certificate_set_openpgp_trustdb(cert_cred, pgp_trustdb);
if (ret < 0) {
fprintf(stderr, "Error setting the OpenPGP trustdb file\n");
GERR(ret);
}
}
if (pgp_certfile != NULL)
if ((ret = gnutls_certificate_set_openpgp_key_file
(cert_cred, pgp_certfile, pgp_keyfile)) < 0) {
fprintf(stderr,
"Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
ret, pgp_certfile, pgp_keyfile);
GERR(ret);
}
#endif
if (x509_certfile != NULL)
if ((ret = gnutls_certificate_set_x509_key_file
(cert_cred, x509_certfile, x509_keyfile, x509ctype)) < 0) {
fprintf(stderr,
"Error reading '%s' or '%s'\n", x509_certfile,
x509_keyfile);
GERR(ret);
exit(1);
}
if (x509_dsacertfile != NULL)
if ((ret = gnutls_certificate_set_x509_key_file
(cert_cred, x509_dsacertfile, x509_dsakeyfile,
x509ctype)) < 0) {
fprintf(stderr, "Error reading '%s' or '%s'\n",
x509_dsacertfile, x509_dsakeyfile);
GERR(ret);
exit(1);
}
if (generate != 0 || read_dh_params != NULL) {
gnutls_certificate_set_params_function(cert_cred, get_params);
/* gnutls_certificate_set_dh_params(cert_cred, dh_params);
* gnutls_certificate_set_rsa_export_params(cert_cred, rsa_params);
*/
}
/* this is a password file (created with the included srpcrypt utility)
* Read README.crypt prior to using SRP.
*/
#ifdef ENABLE_SRP
if (srp_passwd != NULL) {
gnutls_srp_allocate_server_credentials(&srp_cred);
if ((ret =
gnutls_srp_set_server_credentials_file(srp_cred, srp_passwd,
srp_passwd_conf)) <
0) {
/* only exit is this function is not disabled
*/
fprintf(stderr, "Error while setting SRP parameters\n");
GERR(ret);
}
}
#endif
#ifdef ENABLE_ANON
gnutls_anon_allocate_server_credentials(&dh_cred);
if (generate != 0)
gnutls_anon_set_params_function(dh_cred, get_params);
/* gnutls_anon_set_server_dh_params(dh_cred, dh_params); */
#endif
h = listen_socket(name, port);
if (h < 0)
exit(1);
for (;;) {
listener_item *j;
fd_set rd, wr;
int val;
FD_ZERO(&rd);
FD_ZERO(&wr);
n = 0;
/* check for new incoming connections */
FD_SET(h, &rd);
n = max(n, h);
/* flag which connections we are reading or writing to within the fd sets */
lloopstart(listener_list, j) {
#ifndef _WIN32
val = fcntl(j->fd, F_GETFL, 0);
if ((val == -1)
|| (fcntl(j->fd, F_SETFL, val | O_NONBLOCK) < 0)) {
perror("fcntl()");
exit(1);
}
#endif
if (j->http_state == HTTP_STATE_REQUEST) {
FD_SET(j->fd, &rd);
n = max(n, j->fd);
}
if (j->http_state == HTTP_STATE_RESPONSE) {
FD_SET(j->fd, &wr);
n = max(n, j->fd);
}
}
lloopend(listener_list, j);
/* core operation */
n = select(n + 1, &rd, &wr, NULL, NULL);
if (n == -1 && errno == EINTR)
continue;
if (n < 0) {
perror("select()");
exit(1);
}
/* a new connection has arrived */
if (FD_ISSET(h, &rd)) {
unsigned int l;
gnutls_session tls_session;
tls_session = initialize_session();
l = sizeof(client_address);
memset(&client_address, 0, l);
accept_fd = accept(h, (struct sockaddr *) &client_address, &l);
if (accept_fd < 0) {
perror("accept()");
} else {
time_t tt;
char *ctt;
/* new list entry for the connection */
lappend(listener_list);
j = listener_list.tail;
j->http_request = (char *) strdup("");
j->http_state = HTTP_STATE_REQUEST;
j->fd = accept_fd;
j->tls_session = tls_session;
gnutls_transport_set_ptr(tls_session,
(gnutls_transport_ptr) accept_fd);
j->handshake_ok = 0;
if (verbose == 0) {
tt = time(0);
ctt = ctime(&tt);
ctt[strlen(ctt) - 1] = 0;
/*
printf("\n* connection from %s, port %d\n",
inet_ntop(AF_INET, &client_address.sin_addr, topbuf,
sizeof(topbuf)), ntohs(client_address.sin_port));
*/
}
}
}
/* read or write to each connection as indicated by select()'s return argument */
lloopstart(listener_list, j) {
if (FD_ISSET(j->fd, &rd)) {
/* read partial GET request */
char buf[1024];
int r, ret;
if (j->handshake_ok == 0) {
r = gnutls_handshake(j->tls_session);
if (r < 0 && gnutls_error_is_fatal(r) == 0) {
check_alert(j->tls_session, r);
/* nothing */
} else if (r < 0 && gnutls_error_is_fatal(r) == 1) {
fprintf(stderr, "Error in handshake\n");
GERR(r);
do {
ret =
gnutls_alert_send_appropriate(j->
tls_session,
r);
} while (ret == GNUTLS_E_AGAIN);
j->http_state = HTTP_STATE_CLOSING;
} else if (r == 0) {
if (gnutls_session_is_resumed(j->tls_session) != 0
&& verbose == 0)
printf("*** This is a resumed session\n");
if (verbose == 0) {
printf("\n* connection from %s, port %d\n",
inet_ntop(AF_INET,
&client_address.sin_addr,
topbuf, sizeof(topbuf)),
ntohs(client_address.sin_port));
print_info(j->tls_session, NULL);
}
j->handshake_ok = 1;
}
}
if (j->handshake_ok == 1) {
r = gnutls_record_recv(j->tls_session, buf,
min(1024, SMALL_READ_TEST));
if (r == GNUTLS_E_INTERRUPTED || r == GNUTLS_E_AGAIN) {
/* do nothing */
} else if (r <= 0) {
j->http_state = HTTP_STATE_CLOSING;
if (r < 0
&& r != GNUTLS_E_UNEXPECTED_PACKET_LENGTH) {
check_alert(j->tls_session, r);
fprintf(stderr,
"Error while receiving data\n");
GERR(r);
}
} else {
j->http_request =
realloc(j->http_request,
j->request_length + r + 1);
if (j->http_request != NULL) {
memcpy(j->http_request + j->request_length,
buf, r);
j->request_length += r;
j->http_request[j->request_length] = '\0';
} else
j->http_state = HTTP_STATE_CLOSING;
}
/* check if we have a full HTTP header */
j->http_response = NULL;
if (j->http_request != NULL) {
if ((http == 0 && strchr(j->http_request, '\n'))
|| strstr(j->http_request, "\r\n\r\n")
|| strstr(j->http_request, "\n\n")) {
get_response(j->tls_session, j->http_request,
&j->http_response,
&j->response_length);
j->http_state = HTTP_STATE_RESPONSE;
j->response_written = 0;
}
}
}
}
if (FD_ISSET(j->fd, &wr)) {
/* write partial response request */
int r;
if (j->handshake_ok == 0) {
r = gnutls_handshake(j->tls_session);
if (r < 0 && gnutls_error_is_fatal(r) == 0) {
check_alert(j->tls_session, r);
/* nothing */
} else if (r < 0 && gnutls_error_is_fatal(r) == 1) {
int ret;
j->http_state = HTTP_STATE_CLOSING;
fprintf(stderr, "Error in handshake\n");
GERR(r);
do {
ret =
gnutls_alert_send_appropriate(j->
tls_session,
r);
} while (ret == GNUTLS_E_AGAIN);
} else if (r == 0) {
if (gnutls_session_is_resumed(j->tls_session) != 0
&& verbose == 0)
printf("*** This is a resumed session\n");
if (verbose == 0) {
printf("- connection from %s, port %d\n",
inet_ntop(AF_INET,
&client_address.sin_addr,
topbuf, sizeof(topbuf)),
ntohs(client_address.sin_port));
print_info(j->tls_session, NULL);
}
j->handshake_ok = 1;
}
}
if (j->handshake_ok == 1) {
/* FIXME if j->http_response == NULL? */
r = gnutls_record_send(j->tls_session,
j->http_response +
j->response_written,
min(j->response_length -
j->response_written,
SMALL_READ_TEST));
if (r == GNUTLS_E_INTERRUPTED || r == GNUTLS_E_AGAIN) {
/* do nothing */
} else if (r <= 0) {
if (http != 0)
j->http_state = HTTP_STATE_CLOSING;
else {
j->http_state = HTTP_STATE_REQUEST;
free(j->http_response);
j->response_length = 0;
j->request_length = 0;
j->http_request[0] = 0;
}
if (r < 0) {
fprintf(stderr, "Error while sending data\n");
GERR(r);
}
check_alert(j->tls_session, r);
} else {
j->response_written += r;
/* check if we have written a complete response */
if (j->response_written == j->response_length) {
if (http != 0)
j->http_state = HTTP_STATE_CLOSING;
else {
j->http_state = HTTP_STATE_REQUEST;
free(j->http_response);
j->response_length = 0;
j->request_length = 0;
j->http_request[0] = 0;
}
}
}
}
}
}
lloopend(listener_list, j);
/* loop through all connections, closing those that are in error */
lloopstart(listener_list, j) {
if (j->http_state == HTTP_STATE_CLOSING) {
ldeleteinc(listener_list, j);
}
}
lloopend(listener_list, j);
}
gnutls_certificate_free_credentials(cert_cred);
#ifdef ENABLE_SRP
gnutls_srp_free_server_credentials(srp_cred);
#endif
#ifdef ENABLE_ANON
gnutls_anon_free_server_credentials(dh_cred);
#endif
if (nodb == 0)
wrap_db_deinit();
gnutls_global_deinit();
return 0;
}
static gaainfo info;
void gaa_parser(int argc, char **argv)
{
if (gaa(argc, argv, &info) != -1) {
fprintf(stderr,
"Error in the arguments. Use the --help or -h parameters to get more information.\n");
exit(1);
}
debug = info.debug;
verbose = info.quiet;
nodb = info.nodb;
if (info.http == 0)
http = 0;
else
http = 1;
if (info.fmtder == 0)
x509ctype = GNUTLS_X509_FMT_PEM;
else
x509ctype = GNUTLS_X509_FMT_DER;
if (info.generate == 0)
generate = 0;
else
generate = 1;
dh_params_file = info.dh_params_file;
port = info.port;
x509_certfile = info.x509_certfile;
x509_keyfile = info.x509_keyfile;
x509_dsacertfile = info.x509_dsacertfile;
x509_dsakeyfile = info.x509_dsakeyfile;
x509_cafile = info.x509_cafile;
x509_crlfile = info.x509_crlfile;
pgp_certfile = info.pgp_certfile;
pgp_keyfile = info.pgp_keyfile;
srp_passwd = info.srp_passwd;
srp_passwd_conf = info.srp_passwd_conf;
pgp_keyring = info.pgp_keyring;
pgp_trustdb = info.pgp_trustdb;
parse_protocols(info.proto, info.nproto, protocol_priority);
parse_ciphers(info.ciphers, info.nciphers, cipher_priority);
parse_macs(info.macs, info.nmacs, mac_priority);
parse_ctypes(info.ctype, info.nctype, cert_type_priority);
parse_kx(info.kx, info.nkx, kx_priority);
parse_comp(info.comp, info.ncomp, comp_priority);
}
void serv_version(void)
{
fprintf(stderr, "GNU TLS test server, ");
fprintf(stderr, "version %s. Libgnutls %s.\n", LIBGNUTLS_VERSION,
gnutls_check_version(NULL));
}
/* session resuming support */
#define SESSION_ID_SIZE 32
#define SESSION_DATA_SIZE 1024
typedef struct {
char session_id[SESSION_ID_SIZE];
unsigned int session_id_size;
char session_data[SESSION_DATA_SIZE];
unsigned int session_data_size;
} CACHE;
static CACHE *cache_db;
int cache_db_ptr = 0;
static void wrap_db_init(void)
{
/* allocate cache_db */
cache_db = calloc(1, ssl_session_cache * sizeof(CACHE));
}
static void wrap_db_deinit(void)
{
}
static int wrap_db_store(void *dbf, gnutls_datum key, gnutls_datum data)
{
if (cache_db == NULL)
return -1;
if (key.size > SESSION_ID_SIZE)
return -1;
if (data.size > SESSION_DATA_SIZE)
return -1;
memcpy(cache_db[cache_db_ptr].session_id, key.data, key.size);
cache_db[cache_db_ptr].session_id_size = key.size;
memcpy(cache_db[cache_db_ptr].session_data, data.data, data.size);
cache_db[cache_db_ptr].session_data_size = data.size;
cache_db_ptr++;
cache_db_ptr %= ssl_session_cache;
return 0;
}
static gnutls_datum wrap_db_fetch(void *dbf, gnutls_datum key)
{
gnutls_datum res = { NULL, 0 };
int i;
if (cache_db == NULL)
return res;
for (i = 0; i < ssl_session_cache; i++) {
if (key.size == cache_db[i].session_id_size &&
memcmp(key.data, cache_db[i].session_id, key.size) == 0) {
res.size = cache_db[i].session_data_size;
res.data = gnutls_malloc(res.size);
if (res.data == NULL)
return res;
memcpy(res.data, cache_db[i].session_data, res.size);
return res;
}
}
return res;
}
static int wrap_db_delete(void *dbf, gnutls_datum key)
{
int i;
if (cache_db == NULL)
return -1;
for (i = 0; i < ssl_session_cache; i++) {
if (key.size == (unsigned int) cache_db[i].session_id_size &&
memcmp(key.data, cache_db[i].session_id, key.size) == 0) {
cache_db[i].session_id_size = 0;
cache_db[i].session_data_size = 0;
return 0;
}
}
return -1;
}
void print_serv_license(void)
{
fputs("\nCopyright (C) 2001-2003 Paul Sheer, Nikos Mavroyanopoulos\n"
"\nCopyright (C) 2004 Free Software Foundation\n"
"This program is free software; you can redistribute it and/or modify \n"
"it under the terms of the GNU General Public License as published by \n"
"the Free Software Foundation; either version 2 of the License, or \n"
"(at your option) any later version. \n" "\n"
"This program is distributed in the hope that it will be useful, \n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of \n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \n"
"GNU General Public License for more details. \n" "\n"
"You should have received a copy of the GNU General Public License \n"
"along with this program; if not, write to the Free Software \n"
"Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n\n",
stdout);
}
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