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|
/*
* Copyright (C) 2004-2012 Free Software Foundation, Inc.
* Copyright (C) 2001,2002 Paul Sheer
* Copyright (C) 2016-2018 Red Hat, Inc.
* Portions Copyright (C) 2002,2003 Nikos Mavrogiannopoulos
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
/* This server is heavily modified for GnuTLS by Nikos Mavrogiannopoulos
* (which means it is quite unreadable)
*/
#include <config.h>
#include "common.h"
#include "gnutls-serv-options.h"
#include "udp-serv.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <string.h>
#include <gnutls/gnutls.h>
#include <gnutls/dtls.h>
#include <sys/time.h>
#include <sys/select.h>
#include <fcntl.h>
#include <netdb.h>
#include <unistd.h>
#include <socket.h>
/* Gnulib portability files. */
#include "gl_linked_list.h"
#include "gl_xlist.h"
#include "minmax.h"
#include "read-file.h"
#include "sockets.h"
#include "xalloc.h"
#include "xsize.h"
/* konqueror cannot handle sending the page in multiple
* pieces.
*/
/* global stuff */
static int generate = 0;
static int http = 0;
static int strip_crlf = 1;
static int x509ctype;
static int debug = 0;
unsigned int verbose = 1;
static int nodb;
static int noticket;
static int earlydata;
int require_cert;
int disable_client_cert;
const char *psk_passwd = NULL;
const char *srp_passwd = NULL;
const char *srp_passwd_conf = NULL;
const char **x509_keyfile = NULL;
const char **x509_certfile = NULL;
unsigned x509_certfile_size = 0;
unsigned x509_keyfile_size = 0;
const char *x509_cafile = NULL;
const char *dh_params_file = NULL;
const char *x509_crlfile = NULL;
const char *priorities = NULL;
const char **rawpk_keyfile = NULL;
const char **rawpk_file = NULL;
unsigned rawpk_keyfile_size = 0;
unsigned rawpk_file_size = 0;
const char **ocsp_responses = NULL;
unsigned ocsp_responses_size = 0;
const char *sni_hostname = NULL;
int sni_hostname_fatal = 0;
const char **alpn_protos = NULL;
unsigned alpn_protos_size = 0;
gnutls_datum_t session_ticket_key;
gnutls_anti_replay_t anti_replay;
int record_max_size;
const char *http_data_file = NULL;
static void tcp_server(const char *name, int port);
/* 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 GERR(ret) fprintf(stderr, "Error: %s\n", safe_strerror(ret))
#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"
/* These are global */
gnutls_srp_server_credentials_t srp_cred = NULL;
gnutls_psk_server_credentials_t psk_cred = NULL;
#ifdef ENABLE_ANON
gnutls_anon_server_credentials_t dh_cred = NULL;
#endif
gnutls_certificate_credentials_t cert_cred = NULL;
const int ssl_session_cache = 2048;
static void wrap_db_init(void);
static void wrap_db_deinit(void);
static int wrap_db_store(void *dbf, gnutls_datum_t key,
gnutls_datum_t data);
static gnutls_datum_t wrap_db_fetch(void *dbf, gnutls_datum_t key);
static int wrap_db_delete(void *dbf, gnutls_datum_t key);
static int anti_replay_db_add(void *dbf, time_t exp, const gnutls_datum_t *key,
const gnutls_datum_t *data);
static void cmd_parser(int argc, char **argv);
#define HTTP_STATE_REQUEST 1
#define HTTP_STATE_RESPONSE 2
#define HTTP_STATE_CLOSING 3
typedef struct {
char *http_request;
char *http_response;
int request_length;
int response_length;
int response_written;
int http_state;
int listen_socket;
int fd;
gnutls_session_t tls_session;
int handshake_ok;
int close_ok;
time_t start;
int earlydata_eof;
} listener_item;
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(const void *elt)
{
listener_item *j = (listener_item *)elt;
free(j->http_request);
free(j->http_response);
if (j->fd >= 0) {
if (j->close_ok)
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_t dh_params = NULL;
gnutls_rsa_params_t rsa_params = NULL;
static int generate_dh_primes(void)
{
int prime_bits =
gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH,
GNUTLS_SEC_PARAM_MEDIUM);
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 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_t params;
FILE *fp;
if (gnutls_dh_params_init(&dh_params) < 0) {
fprintf(stderr, "Error in dh parameter initialization\n");
exit(1);
}
/* read the params file
*/
fp = fopen(dh_params_file, "r");
if (fp == NULL) {
fprintf(stderr, "Could not open %s\n", dh_params_file);
exit(1);
}
size = fread(tmpdata, 1, sizeof(tmpdata) - 1, fp);
tmpdata[size] = 0;
fclose(fp);
params.data = (unsigned char *) 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_t session, gnutls_params_type_t type,
gnutls_params_st * st)
{
if (type == GNUTLS_PARAMS_DH) {
if (dh_params == NULL)
return -1;
st->params.dh = dh_params;
} else
return -1;
st->type = type;
st->deinit = 0;
return 0;
}
static gl_list_t listener_list;
static int cert_verify_callback(gnutls_session_t session)
{
listener_item * j = gnutls_session_get_ptr(session);
unsigned int size;
int ret;
if (gnutls_auth_get_type(session) == GNUTLS_CRD_CERTIFICATE) {
if (!require_cert && gnutls_certificate_get_peers(session, &size) == NULL)
return 0;
if (ENABLED_OPT(VERIFY_CLIENT_CERT)) {
if (cert_verify(session, NULL, NULL) == 0) {
do {
ret = gnutls_alert_send(session, GNUTLS_AL_FATAL, GNUTLS_A_ACCESS_DENIED);
} while(ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN);
j->http_state = HTTP_STATE_CLOSING;
return -1;
}
} else {
printf("- Peer's certificate was NOT verified.\n");
}
}
return 0;
}
/* callback used to verify if the host name advertised in client hello matches
* the one configured in server
*/
static int
post_client_hello(gnutls_session_t session)
{
int ret;
/* DNS names (only type supported) may be at most 256 byte long */
char *name;
size_t len = 256;
unsigned int type;
int i;
name = malloc(len);
if (name == NULL)
return GNUTLS_E_MEMORY_ERROR;
for (i=0; ; ) {
ret = gnutls_server_name_get(session, name, &len, &type, i);
if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER) {
char *new_name;
new_name = realloc(name, len);
if (new_name == NULL) {
ret = GNUTLS_E_MEMORY_ERROR;
goto end;
}
name = new_name;
continue; /* retry call with same index */
}
/* check if it is the last entry in list */
if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
break;
i++;
if (ret != GNUTLS_E_SUCCESS)
goto end;
/* unknown types need to be ignored */
if (type != GNUTLS_NAME_DNS)
continue;
if (strlen(sni_hostname) != len)
continue;
/* API guarantees that the name of type DNS will be null terminated */
if (!strncmp(name, sni_hostname, len)) {
ret = GNUTLS_E_SUCCESS;
goto end;
}
};
/* when there is no extension, we can't send the extension specific alert */
if (i == 0) {
fprintf(stderr, "Warning: client did not include SNI extension, using default host\n");
ret = GNUTLS_E_SUCCESS;
goto end;
}
if (sni_hostname_fatal == 1) {
/* abort the connection, propagate error up the stack */
ret = GNUTLS_E_UNRECOGNIZED_NAME;
goto end;
}
fprintf(stderr, "Warning: client provided unrecognized host name\n");
/* since we just want to send an alert, not abort the connection, we
* need to send it ourselves
*/
do {
ret = gnutls_alert_send(session,
GNUTLS_AL_WARNING,
GNUTLS_A_UNRECOGNIZED_NAME);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
/* continue handshake, fall through */
end:
free(name);
return ret;
}
#define MAX_ALPN_PROTOCOLS 16
gnutls_session_t initialize_session(int dtls)
{
gnutls_session_t session;
int ret;
unsigned i;
const char *err;
#ifdef ENABLE_ALPN
gnutls_datum_t alpn[MAX_ALPN_PROTOCOLS];
#endif
unsigned alpn_size;
unsigned flags = GNUTLS_SERVER | GNUTLS_POST_HANDSHAKE_AUTH | GNUTLS_ENABLE_RAWPK;
if (dtls)
flags |= GNUTLS_DATAGRAM;
if (earlydata)
flags |= GNUTLS_ENABLE_EARLY_DATA;
gnutls_init(&session, flags);
/* allow the use of private ciphersuites.
*/
gnutls_handshake_set_private_extensions(session, 1);
gnutls_handshake_set_timeout(session,
GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT);
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);
}
if (noticket == 0)
gnutls_session_ticket_enable_server(session,
&session_ticket_key);
if (earlydata) {
gnutls_anti_replay_enable(session, anti_replay);
if (HAVE_OPT(MAXEARLYDATA)) {
ret = gnutls_record_set_max_early_data_size(session, OPT_VALUE_MAXEARLYDATA);
if (ret < 0) {
fprintf(stderr, "Could not set max early data size: %s\n", gnutls_strerror(ret));
exit(1);
}
}
}
if (sni_hostname != NULL)
gnutls_handshake_set_post_client_hello_function(session,
&post_client_hello);
if (priorities == NULL) {
ret = gnutls_set_default_priority(session);
if (ret < 0) {
fprintf(stderr, "Could not set default policy: %s\n", gnutls_strerror(ret));
exit(1);
}
} else {
ret = gnutls_priority_set_direct(session, priorities, &err);
if (ret < 0) {
fprintf(stderr, "Syntax error at: %s\n", err);
exit(1);
}
}
#ifndef ENABLE_ALPN
if (alpn_protos_size != 0) {
fprintf(stderr, "ALPN is not supported\n");
exit(1);
}
#else
alpn_size = MIN(MAX_ALPN_PROTOCOLS,alpn_protos_size);
for (i=0;i<alpn_size;i++) {
alpn[i].data = (void*)alpn_protos[i];
alpn[i].size = strlen(alpn_protos[i]);
}
ret = gnutls_alpn_set_protocols(session, alpn, alpn_size, HAVE_OPT(ALPN_FATAL)?GNUTLS_ALPN_MANDATORY:0);
if (ret < 0) {
fprintf(stderr, "Error setting ALPN protocols: %s\n", gnutls_strerror(ret));
exit(1);
}
#endif
#ifdef ENABLE_ANON
gnutls_credentials_set(session, GNUTLS_CRD_ANON, dh_cred);
#endif
if (srp_cred != NULL)
gnutls_credentials_set(session, GNUTLS_CRD_SRP, srp_cred);
if (psk_cred != NULL)
gnutls_credentials_set(session, GNUTLS_CRD_PSK, psk_cred);
if (cert_cred != NULL) {
gnutls_certificate_set_verify_function(cert_cred,
cert_verify_callback);
gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
cert_cred);
}
if (disable_client_cert)
gnutls_certificate_server_set_request(session,
GNUTLS_CERT_IGNORE);
else {
if (require_cert)
gnutls_certificate_server_set_request(session,
GNUTLS_CERT_REQUIRE);
else
gnutls_certificate_server_set_request(session,
GNUTLS_CERT_REQUEST);
}
/* use the record size limit extension */
if (record_max_size > 0) {
if (gnutls_record_set_max_recv_size(session, record_max_size) <
0) {
fprintf(stderr,
"Cannot set the maximum record receive size to %d.\n",
record_max_size);
exit(1);
}
}
if (HAVE_OPT(COMPRESS_CERT)) {
ret = compress_cert_set_methods(session,
OPTS_ARRAY(COMPRESS_CERT),
OPTS_COUNT(COMPRESS_CERT));
if (ret < 0)
exit(1);
}
if (HAVE_OPT(HEARTBEAT))
gnutls_heartbeat_enable(session,
GNUTLS_HB_PEER_ALLOWED_TO_SEND);
#ifdef ENABLE_DTLS_SRTP
if (HAVE_OPT(SRTP_PROFILES)) {
ret =
gnutls_srtp_set_profile_direct(session,
OPT_ARG(SRTP_PROFILES),
&err);
if (ret == GNUTLS_E_INVALID_REQUEST)
fprintf(stderr, "Syntax error at: %s\n", err);
else if (ret != 0)
fprintf(stderr, "Error in profiles: %s\n",
gnutls_strerror(ret));
else fprintf(stderr,"DTLS profile set to %s\n",
OPT_ARG(SRTP_PROFILES));
if (ret != 0) exit(1);
}
#endif
return session;
}
#include <gnutls/x509.h>
static const char DEFAULT_DATA[] =
"This is the default message reported by the GnuTLS implementation. "
"For more information please visit "
"<a href=\"https://www.gnutls.org/\">https://www.gnutls.org/</a>.";
/* Creates html with the current session information.
*/
#define tmp_buffer &http_buffer[strlen(http_buffer)]
#define tmp_buffer_size len-strlen(http_buffer)
static char *peer_print_info(gnutls_session_t session, int *ret_length,
const char *header)
{
const char *tmp;
unsigned char sesid[32];
size_t i, sesid_size;
char *http_buffer, *desc;
gnutls_kx_algorithm_t kx_alg;
size_t len = 20 * 1024 + strlen(header);
char *crtinfo = NULL;
gnutls_protocol_t version;
size_t ncrtinfo = 0;
if (verbose == 0) {
http_buffer = malloc(len);
if (http_buffer == NULL)
return NULL;
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;
}
if (gnutls_certificate_type_get2(session, GNUTLS_CTYPE_CLIENT) == GNUTLS_CRT_X509) {
const gnutls_datum_t *cert_list;
unsigned int cert_list_size = 0;
cert_list =
gnutls_certificate_get_peers(session, &cert_list_size);
for (i = 0; i < cert_list_size; i++) {
gnutls_x509_crt_t cert = NULL;
gnutls_datum_t info;
if (gnutls_x509_crt_init(&cert) == 0 &&
gnutls_x509_crt_import(cert, &cert_list[i],
GNUTLS_X509_FMT_DER) ==
0
&& gnutls_x509_crt_print(cert,
GNUTLS_CRT_PRINT_FULL,
&info) == 0) {
const char post[] = "</PRE><P><PRE>";
char *crtinfo_new;
size_t ncrtinfo_new;
ncrtinfo_new = xsum3(ncrtinfo, info.size,
sizeof(post));
if (size_overflow_p(ncrtinfo_new)) {
free(crtinfo);
return NULL;
}
crtinfo_new = realloc(crtinfo, ncrtinfo_new);
if (crtinfo_new == NULL) {
free(crtinfo);
return NULL;
}
crtinfo = crtinfo_new;
memcpy(crtinfo + ncrtinfo, info.data,
info.size);
ncrtinfo += info.size;
memcpy(crtinfo + ncrtinfo, post,
strlen(post));
ncrtinfo += strlen(post);
crtinfo[ncrtinfo] = '\0';
gnutls_free(info.data);
}
gnutls_x509_crt_deinit(cert);
}
}
http_buffer = malloc(len);
if (http_buffer == NULL) {
free(crtinfo);
return NULL;
}
strcpy(http_buffer, HTTP_BEGIN);
version = gnutls_protocol_get_version(session);
/* print session_id */
sesid_size = sizeof(sesid);
gnutls_session_get_id(session, sesid, &sesid_size);
snprintf(tmp_buffer, tmp_buffer_size, "\n<p>Session ID: <i>");
for (i = 0; i < sesid_size; i++)
snprintf(tmp_buffer, tmp_buffer_size, "%.2X", sesid[i]);
snprintf(tmp_buffer, tmp_buffer_size, "</i></p>\n");
snprintf(tmp_buffer, tmp_buffer_size,
"<h5>If your browser supports session resumption, 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) {
snprintf(tmp_buffer, tmp_buffer_size,
"\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) {
snprintf(tmp_buffer, tmp_buffer_size,
"<p>Connected as user '%s'.</p>\n",
gnutls_srp_server_get_username(session));
}
#endif
#ifdef ENABLE_PSK
if (kx_alg == GNUTLS_KX_PSK && gnutls_psk_server_get_username(session)) {
snprintf(tmp_buffer, tmp_buffer_size,
"<p>Connected as user '%s'.</p>\n",
gnutls_psk_server_get_username(session));
}
#endif
/* print session information */
strcat(http_buffer, "<P>\n");
tmp =
gnutls_protocol_get_name(version);
if (tmp == NULL)
tmp = str_unknown;
snprintf(tmp_buffer, tmp_buffer_size,
"<TABLE border=1><TR><TD>Protocol version:</TD><TD>%s</TD></TR>\n",
tmp);
desc = gnutls_session_get_desc(session);
if (desc) {
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>Description:</TD><TD>%s</TD></TR>\n",
desc);
gnutls_free(desc);
}
if (gnutls_auth_get_type(session) == GNUTLS_CRD_CERTIFICATE &&
gnutls_certificate_type_get2(session, GNUTLS_CTYPE_CLIENT) != GNUTLS_CRT_X509) {
tmp =
gnutls_certificate_type_get_name
(gnutls_certificate_type_get2(session, GNUTLS_CTYPE_CLIENT));
if (tmp == NULL)
tmp = str_unknown;
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>Certificate Type:</TD><TD>%s</TD></TR>\n",
tmp);
}
if (version < GNUTLS_TLS1_3) {
tmp = gnutls_kx_get_name(kx_alg);
if (tmp == NULL)
tmp = str_unknown;
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>Key Exchange:</TD><TD>%s</TD></TR>\n", tmp);
#ifdef ENABLE_ANON
if (kx_alg == GNUTLS_KX_ANON_DH) {
snprintf(tmp_buffer, tmp_buffer_size,
"<p> Connect using anonymous DH (prime of %d bits)</p>\n",
gnutls_dh_get_prime_bits(session));
}
#endif
#if defined(ENABLE_DHE) || defined(ENABLE_ANON)
if (kx_alg == GNUTLS_KX_DHE_RSA || kx_alg == GNUTLS_KX_DHE_DSS) {
snprintf(tmp_buffer, tmp_buffer_size,
"Ephemeral DH using prime of <b>%d</b> bits.<br>\n",
gnutls_dh_get_prime_bits(session));
}
#endif
tmp = gnutls_compression_get_name(gnutls_compression_get(session));
if (tmp == NULL)
tmp = str_unknown;
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>Compression</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;
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>Ciphersuite</TD><TD>%s</TD></TR>\n",
tmp);
}
tmp = gnutls_cipher_get_name(gnutls_cipher_get(session));
if (tmp == NULL)
tmp = str_unknown;
snprintf(tmp_buffer, tmp_buffer_size,
"<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;
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>MAC</TD><TD>%s</TD></TR>\n", tmp);
snprintf(tmp_buffer, tmp_buffer_size,
"</TABLE></P>\n");
if (crtinfo) {
snprintf(tmp_buffer, tmp_buffer_size,
"<hr><PRE>%s\n</PRE>\n", crtinfo);
free(crtinfo);
}
snprintf(tmp_buffer, tmp_buffer_size,
"<hr><P>Your HTTP header was:<PRE>%s</PRE></P>\n"
HTTP_END, header);
*ret_length = strlen(http_buffer);
return http_buffer;
}
static char *peer_print_data(gnutls_session_t session, int *ret_length)
{
gnutls_datum_t data;
char *http_buffer;
size_t len;
int ret;
ret = gnutls_load_file(http_data_file, &data);
if (ret < 0) {
ret = asprintf(&http_buffer,
"HTTP/1.0 404 Not Found\r\n"
"Content-type: text/html\r\n"
"\r\n"
"<HTML><HEAD><TITLE>404 Not Found</TITLE></HEAD>\n"
"<BODY><H1>Couldn't read %s</H1></BODY></HTML>\n\n",
http_data_file);
if (ret < 0)
return NULL;
*ret_length = strlen(http_buffer);
return http_buffer;
}
ret = asprintf(&http_buffer,
"HTTP/1.0 200 OK\r\n"
"Content-Type: application/octet-stream\r\n"
"Content-Length: %u\r\n"
"\r\n",
data.size);
if (ret < 0)
return NULL;
len = ret;
http_buffer = realloc(http_buffer, len + data.size);
memcpy(&http_buffer[len], data.data, data.size);
gnutls_free(data.data);
*ret_length = len + data.size;
return http_buffer;
}
const char *human_addr(const struct sockaddr *sa, socklen_t salen,
char *buf, size_t buflen)
{
const char *save_buf = buf;
size_t l;
if (!buf || !buflen)
return "(error)";
*buf = 0;
switch (sa->sa_family) {
#if HAVE_IPV6
case AF_INET6:
snprintf(buf, buflen, "IPv6 ");
break;
#endif
case AF_INET:
snprintf(buf, buflen, "IPv4 ");
break;
}
l = 5;
buf += l;
buflen -= l;
if (getnameinfo(sa, salen, buf, buflen, NULL, 0, NI_NUMERICHOST) !=
0) {
return "(error)";
}
l = strlen(buf);
buf += l;
buflen -= l;
if (buflen < 8)
return save_buf;
strcat(buf, " port ");
buf += 6;
buflen -= 6;
if (getnameinfo(sa, salen, NULL, 0, buf, buflen, NI_NUMERICSERV) !=
0) {
snprintf(buf, buflen, "%s", " unknown");
}
return save_buf;
}
int wait_for_connection(void)
{
fd_set rd, wr;
int n, sock = -1;
gl_list_iterator_t iter;
const void *elt;
FD_ZERO(&rd);
FD_ZERO(&wr);
n = 0;
iter = gl_list_iterator(listener_list);
while (gl_list_iterator_next(&iter, &elt, NULL)) {
const listener_item *j = elt;
if (j->listen_socket) {
FD_SET(j->fd, &rd);
n = MAX(n, j->fd);
}
}
gl_list_iterator_free(&iter);
/* waiting part */
n = select(n + 1, &rd, &wr, NULL, NULL);
if (n == -1 && errno == EINTR)
return -1;
if (n < 0) {
perror("select()");
exit(1);
}
/* find which one is ready */
iter = gl_list_iterator(listener_list);
while (gl_list_iterator_next(&iter, &elt, NULL)) {
const listener_item *j = elt;
/* a new connection has arrived */
if (FD_ISSET(j->fd, &rd) && j->listen_socket) {
sock = j->fd;
break;
}
}
gl_list_iterator_free(&iter);
return sock;
}
int listen_socket(const char *name, int listen_port, int socktype)
{
struct addrinfo hints, *res, *ptr;
char portname[6];
int s = -1;
int yes;
listener_item *j = NULL;
snprintf(portname, sizeof(portname), "%d", listen_port);
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = socktype;
hints.ai_flags = AI_PASSIVE;
if ((s = getaddrinfo(NULL, portname, &hints, &res)) != 0) {
fprintf(stderr, "getaddrinfo() failed: %s\n",
gai_strerror(s));
return -1;
}
for (ptr = res; ptr != NULL; ptr = ptr->ai_next) {
int news;
#ifndef HAVE_IPV6
if (ptr->ai_family != AF_INET)
continue;
#endif
/* Print what we are doing. */
{
char topbuf[512];
fprintf(stderr, "%s listening on %s...",
name, human_addr(ptr->ai_addr,
ptr->ai_addrlen, topbuf,
sizeof(topbuf)));
}
if ((news = socket(ptr->ai_family, ptr->ai_socktype,
ptr->ai_protocol)) < 0) {
perror("socket() failed");
continue;
}
s = news; /* to not overwrite existing s from previous loops */
#if defined(HAVE_IPV6) && !defined(_WIN32)
if (ptr->ai_family == AF_INET6) {
yes = 1;
/* avoid listen on ipv6 addresses failing
* because already listening on ipv4 addresses: */
(void)setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
(const void *) &yes, sizeof(yes));
}
#endif
if (socktype == SOCK_STREAM) {
yes = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
(const void *) &yes,
sizeof(yes)) < 0) {
perror("setsockopt() failed");
close(s);
continue;
}
} else {
#if defined(IP_DONTFRAG)
yes = 1;
if (setsockopt(s, IPPROTO_IP, IP_DONTFRAG,
(const void *) &yes,
sizeof(yes)) < 0)
perror("setsockopt(IP_DF) failed");
#elif defined(IP_MTU_DISCOVER)
yes = IP_PMTUDISC_DO;
if (setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER,
(const void *) &yes,
sizeof(yes)) < 0)
perror("setsockopt(IP_DF) failed");
#endif
}
if (bind(s, ptr->ai_addr, ptr->ai_addrlen) < 0) {
perror("bind() failed");
close(s);
continue;
}
if (socktype == SOCK_STREAM) {
if (listen(s, 10) < 0) {
perror("listen() failed");
exit(1);
}
}
/* new list entry for the connection */
j = xzalloc(sizeof(*j));
gl_list_add_last(listener_list, j);
j->listen_socket = 1;
j->fd = s;
/* Complete earlier message. */
fprintf(stderr, "done\n");
}
fflush(stderr);
freeaddrinfo(res);
return s;
}
/* strips \r\n from the end of the string
*/
static void strip(char *data)
{
int i;
int len = strlen(data);
for (i = 0; i < len; i++) {
if (data[i] == '\r' && data[i + 1] == '\n'
&& data[i + 2] == 0) {
data[i] = '\n';
data[i + 1] = 0;
break;
}
}
}
static unsigned
get_response(gnutls_session_t 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';
}
if (http != 0) {
if (http_data_file == NULL)
*response = peer_print_info(session, response_length, h);
else
*response = peer_print_data(session, response_length);
} else {
int ret;
if (strip_crlf != 0)
strip(request);
fprintf(stderr, "received cmd: %s\n", request);
ret = check_command(session, request, disable_client_cert);
if (ret > 0) {
*response = strdup("Successfully executed command\n");
if (*response == NULL) {
fprintf(stderr, "Memory error\n");
return 0;
}
*response_length = strlen(*response);
return 1;
} else if (ret == 0) {
*response = strdup(request);
if (*response == NULL) {
fprintf(stderr, "Memory error\n");
return 0;
}
*response_length = strlen(*response);
} else {
*response = NULL;
do {
ret = gnutls_alert_send_appropriate(session, ret);
} while(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
return 0;
}
}
return 1;
unimplemented:
*response = strdup(HTTP_UNIMPLEMENTED);
if (*response == NULL)
return 0;
*response_length = ((*response) ? strlen(*response) : 0);
return 1;
}
static void terminate(int sig) __attribute__ ((__noreturn__));
static void terminate(int sig)
{
char buf[64] = { 0 };
char *p;
/* This code must be async-signal-safe. */
p = stpcpy(buf, "Exiting via signal ");
if (sig > 10)
*p++ = '0' + sig / 10;
*p++ = '0' + sig % 10;
*p++ = '\n';
write(STDERR_FILENO, buf, p - buf);
_exit(1);
}
static void check_alert(gnutls_session_t 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 tls_audit_log_func(gnutls_session_t session, const char *str)
{
fprintf(stderr, "|<%p>| %s", session, str);
}
int main(int argc, char **argv)
{
int ret, mtu, port;
char name[256];
int cert_set = 0;
unsigned use_static_dh_params = 0;
unsigned i;
cmd_parser(argc, argv);
#ifndef _WIN32
signal(SIGHUP, SIG_IGN);
signal(SIGTERM, terminate);
if (signal(SIGINT, terminate) == SIG_IGN)
signal(SIGINT, SIG_IGN); /* e.g. background process */
#endif
sockets_init();
listener_list = gl_list_create_empty(GL_LINKED_LIST,
NULL, NULL, listener_free,
true);
if (nodb == 0)
wrap_db_init();
if (HAVE_OPT(UDP))
strcpy(name, "UDP ");
else
name[0] = 0;
if (http == 1) {
strcat(name, "HTTP Server");
} else {
strcat(name, "Echo Server");
}
gnutls_global_set_log_function(tls_log_func);
gnutls_global_set_audit_log_function(tls_audit_log_func);
gnutls_global_set_log_level(debug);
if ((ret = gnutls_global_init()) < 0) {
fprintf(stderr, "global_init: %s\n", gnutls_strerror(ret));
exit(1);
}
#ifdef ENABLE_PKCS11
if (HAVE_OPT(PROVIDER)) {
ret = gnutls_pkcs11_init(GNUTLS_PKCS11_FLAG_MANUAL, NULL);
if (ret < 0)
fprintf(stderr, "pkcs11_init: %s",
gnutls_strerror(ret));
else {
ret =
gnutls_pkcs11_add_provider(OPT_ARG(PROVIDER),
NULL);
if (ret < 0) {
fprintf(stderr, "pkcs11_add_provider: %s",
gnutls_strerror(ret));
exit(1);
}
}
}
pkcs11_common(NULL);
#endif
/* Note that servers must generate parameters for
* Diffie-Hellman. See gnutls_dh_params_generate(), and
* gnutls_dh_params_set().
*/
if (generate != 0) {
generate_dh_primes();
} else if (dh_params_file) {
read_dh_params();
} else {
use_static_dh_params = 1;
}
if (gnutls_certificate_allocate_credentials(&cert_cred) < 0) {
fprintf(stderr, "memory error\n");
exit(1);
}
/* X509 credentials */
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);
}
}
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);
}
}
if (x509_certfile_size > 0 && x509_keyfile_size > 0) {
for (i = 0; i < x509_certfile_size; i++) {
ret = gnutls_certificate_set_x509_key_file
(cert_cred, x509_certfile[i], x509_keyfile[i], x509ctype);
if (ret < 0) {
fprintf(stderr,
"Error reading '%s' or '%s'\n",
x509_certfile[i], x509_keyfile[i]);
GERR(ret);
exit(1);
} else
cert_set = 1;
}
}
/* Raw public-key credentials */
if (rawpk_file_size > 0 && rawpk_keyfile_size > 0) {
for (i = 0; i < rawpk_keyfile_size; i++) {
ret = gnutls_certificate_set_rawpk_key_file(cert_cred, rawpk_file[i],
rawpk_keyfile[i],
x509ctype,
NULL, 0, NULL, 0,
0, 0);
if (ret < 0) {
fprintf(stderr, "Error reading '%s' or '%s'\n",
rawpk_file[i], rawpk_keyfile[i]);
GERR(ret);
exit(1);
} else {
cert_set = 1;
}
}
}
if (cert_set == 0) {
fprintf(stderr,
"Warning: no private key and certificate pairs were set.\n");
}
#ifndef ENABLE_OCSP
if (HAVE_OPT(IGNORE_OCSP_RESPONSE_ERRORS) || ocsp_responses_size != 0) {
fprintf(stderr, "OCSP is not supported!\n");
exit(1);
}
#else
/* OCSP status-request TLS extension */
if (HAVE_OPT(IGNORE_OCSP_RESPONSE_ERRORS))
gnutls_certificate_set_flags(cert_cred, GNUTLS_CERTIFICATE_SKIP_OCSP_RESPONSE_CHECK);
for (i = 0; i < ocsp_responses_size; i++ ) {
ret = gnutls_certificate_set_ocsp_status_request_file
(cert_cred, ocsp_responses[i], 0);
if (ret < 0) {
fprintf(stderr,
"Cannot set OCSP status request file: %s: %s\n",
ocsp_responses[i],
gnutls_strerror(ret));
exit(1);
}
}
#endif
if (use_static_dh_params) {
#if defined(ENABLE_DHE) || defined(ENABLE_ANON)
ret = gnutls_certificate_set_known_dh_params(cert_cred, GNUTLS_SEC_PARAM_MEDIUM);
if (ret < 0) {
fprintf(stderr, "Error while setting DH parameters: %s\n", gnutls_strerror(ret));
exit(1);
}
#else
fprintf(stderr, "Setting DH parameters is not supported\n");
exit(1);
#endif
} else {
gnutls_certificate_set_params_function(cert_cred, get_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
/* this is a password file
*/
#ifdef ENABLE_PSK
if (psk_passwd != NULL) {
gnutls_psk_allocate_server_credentials(&psk_cred);
if ((ret =
gnutls_psk_set_server_credentials_file(psk_cred,
psk_passwd)) <
0) {
/* only exit is this function is not disabled
*/
fprintf(stderr,
"Error while setting PSK parameters\n");
GERR(ret);
}
if (HAVE_OPT(PSKHINT)) {
ret =
gnutls_psk_set_server_credentials_hint
(psk_cred, OPT_ARG(PSKHINT));
if (ret) {
fprintf(stderr,
"Error setting PSK identity hint.\n");
GERR(ret);
}
}
if (use_static_dh_params) {
ret = gnutls_psk_set_server_known_dh_params(psk_cred, GNUTLS_SEC_PARAM_MEDIUM);
if (ret < 0) {
fprintf(stderr, "Error while setting DH parameters: %s\n", gnutls_strerror(ret));
exit(1);
}
} else {
gnutls_psk_set_server_params_function(psk_cred,
get_params);
}
}
#endif
#ifdef ENABLE_ANON
gnutls_anon_allocate_server_credentials(&dh_cred);
if (use_static_dh_params) {
ret = gnutls_anon_set_server_known_dh_params(dh_cred, GNUTLS_SEC_PARAM_MEDIUM);
if (ret < 0) {
fprintf(stderr, "Error while setting DH parameters: %s\n", gnutls_strerror(ret));
exit(1);
}
} else {
gnutls_anon_set_server_params_function(dh_cred, get_params);
}
#endif
if (noticket == 0)
gnutls_session_ticket_key_generate(&session_ticket_key);
if (earlydata) {
ret = gnutls_anti_replay_init(&anti_replay);
if (ret < 0) {
fprintf(stderr, "Error while initializing anti-replay: %s\n", gnutls_strerror(ret));
exit(1);
}
gnutls_anti_replay_set_add_function(anti_replay, anti_replay_db_add);
gnutls_anti_replay_set_ptr(anti_replay, NULL);
}
if (HAVE_OPT(MTU))
mtu = OPT_VALUE_MTU;
else
mtu = 1300;
if (HAVE_OPT(PORT))
port = OPT_VALUE_PORT;
else
port = 5556;
if (HAVE_OPT(UDP))
udp_server(name, port, mtu);
else
tcp_server(name, port);
return 0;
}
static void retry_handshake(listener_item *j)
{
int r, ret;
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) {
j->http_state = HTTP_STATE_CLOSING;
check_alert(j->tls_session, r);
fprintf(stderr, "Error in handshake: %s\n", gnutls_strerror(r));
do {
ret = gnutls_alert_send_appropriate(j->tls_session, r);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
j->close_ok = 0;
} 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) {
#if 0
printf("- connection from %s\n",
human_addr((struct sockaddr *)
&client_address,
calen,
topbuf,
sizeof(topbuf)));
#endif
print_info(j->tls_session, verbose, verbose);
if (HAVE_OPT(KEYMATEXPORT))
print_key_material(j->tls_session,
OPT_ARG(KEYMATEXPORT),
HAVE_OPT(KEYMATEXPORTSIZE) ?
OPT_VALUE_KEYMATEXPORTSIZE :
20);
}
j->close_ok = 1;
j->handshake_ok = 1;
}
}
static void try_rehandshake(listener_item *j)
{
int r, ret;
fprintf(stderr, "*** Received hello message\n");
do {
r = gnutls_handshake(j->tls_session);
} while (r == GNUTLS_E_INTERRUPTED || r == GNUTLS_E_AGAIN);
if (r < 0) {
do {
ret = gnutls_alert_send_appropriate(j->tls_session, r);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
fprintf(stderr, "Error in rehandshake: %s\n", gnutls_strerror(r));
j->http_state = HTTP_STATE_CLOSING;
} else {
j->close_ok = 1;
j->http_state = HTTP_STATE_REQUEST;
}
}
static void tcp_server(const char *name, int port)
{
int n, s;
char topbuf[512];
int accept_fd;
struct sockaddr_storage client_address;
socklen_t calen;
struct timeval tv;
s = listen_socket(name, port, SOCK_STREAM);
if (s < 0)
exit(1);
for (;;) {
gl_list_iterator_t iter;
gl_list_node_t node;
const void *elt;
gl_list_t accepted_list = gl_list_create_empty(GL_LINKED_LIST,
NULL, NULL, NULL,
true);
fd_set rd, wr;
time_t now = time(0);
#ifndef _WIN32
int val;
#endif
FD_ZERO(&rd);
FD_ZERO(&wr);
n = 0;
/* flag which connections we are reading or writing to within the fd sets */
iter = gl_list_iterator(listener_list);
while (gl_list_iterator_next(&iter, &elt, &node)) {
listener_item *j = (listener_item *)elt;
#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->start != 0 && now - j->start > 30) {
if (verbose != 0) {
fprintf(stderr, "Scheduling inactive connection for close\n");
}
j->http_state = HTTP_STATE_CLOSING;
}
if (j->listen_socket) {
FD_SET(j->fd, &rd);
n = MAX(n, j->fd);
}
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);
}
gl_list_node_set_value(listener_list, node, j);
}
gl_list_iterator_free(&iter);
/* core operation */
tv.tv_sec = 10;
tv.tv_usec = 0;
n = select(n + 1, &rd, &wr, NULL, &tv);
if (n == -1 && errno == EINTR)
continue;
if (n < 0) {
perror("select()");
exit(1);
}
/* read or write to each connection as indicated by select()'s return argument */
iter = gl_list_iterator(listener_list);
while (gl_list_iterator_next(&iter, &elt, &node)) {
listener_item *j = (listener_item *)elt;
/* a new connection has arrived */
if (FD_ISSET(j->fd, &rd) && j->listen_socket) {
calen = sizeof(client_address);
memset(&client_address, 0, calen);
accept_fd =
accept(j->fd,
(struct sockaddr *)
&client_address, &calen);
if (accept_fd < 0) {
perror("accept()");
} else {
char timebuf[SIMPLE_CTIME_BUF_SIZE];
time_t tt = time(0);
char *ctt;
listener_item *jj;
/* new list entry for the connection */
jj = xzalloc(sizeof(*jj));
gl_list_add_last(accepted_list, jj);
jj->http_request =
(char *) strdup("");
jj->http_state = HTTP_STATE_REQUEST;
jj->fd = accept_fd;
jj->start = tt;
jj->tls_session = initialize_session(0);
gnutls_session_set_ptr(jj->tls_session, jj);
gnutls_transport_set_int
(jj->tls_session, accept_fd);
set_read_funcs(jj->tls_session);
jj->handshake_ok = 0;
jj->close_ok = 0;
if (verbose != 0) {
ctt = simple_ctime(&tt, timebuf);
ctt[strlen(ctt) - 1] = 0;
printf
("\n* Accepted connection from %s on %s\n",
human_addr((struct
sockaddr
*)
&client_address,
calen,
topbuf,
sizeof
(topbuf)),
ctt);
}
}
}
if (FD_ISSET(j->fd, &rd) && !j->listen_socket) {
/* read partial GET request */
char buf[16*1024];
int r;
if (j->handshake_ok == 0) {
retry_handshake(j);
}
if (j->handshake_ok == 1) {
int earlydata_read = 0;
if (earlydata && !j->earlydata_eof) {
r = gnutls_record_recv_early_data(j->
tls_session,
buf,
MIN(sizeof(buf),
SMALL_READ_TEST));
if (r == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
j->earlydata_eof = 1;
}
if (r == 0) {
earlydata_read = 1;
}
}
if (!earlydata_read) {
r = gnutls_record_recv(j->
tls_session,
buf,
MIN(sizeof(buf),
SMALL_READ_TEST));
}
if (r == GNUTLS_E_INTERRUPTED || r == GNUTLS_E_AGAIN) {
/* do nothing */
} else if (r <= 0) {
if (r == GNUTLS_E_HEARTBEAT_PING_RECEIVED) {
gnutls_heartbeat_pong(j->tls_session, 0);
} else if (r == GNUTLS_E_REHANDSHAKE) {
try_rehandshake(j);
} else {
j->http_state = HTTP_STATE_CLOSING;
if (r < 0) {
int ret;
check_alert(j->tls_session, r);
fprintf(stderr,
"Error while receiving data\n");
do {
ret = gnutls_alert_send_appropriate(j->tls_session, r);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
GERR(r);
j->close_ok = 0;
}
}
} 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_state == HTTP_STATE_REQUEST && 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")) {
if (get_response(j->
tls_session,
j->
http_request,
&j->
http_response,
&j->
response_length)) {
j->http_state =
HTTP_STATE_RESPONSE;
j->response_written
= 0;
} else {
j->http_state = HTTP_STATE_CLOSING;
}
}
}
}
}
if (FD_ISSET(j->fd, &wr)) {
/* write partial response request */
int r;
if (j->handshake_ok == 0) {
retry_handshake(j);
}
if (j->handshake_ok == 1 && j->http_response == NULL) {
j->http_state = HTTP_STATE_CLOSING;
} else if (j->handshake_ok == 1 && 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) {
j->http_state = HTTP_STATE_CLOSING;
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->http_response = NULL;
j->response_length = 0;
j->request_length = 0;
j->http_request[0] = 0;
}
}
}
} else {
j->request_length = 0;
j->http_request[0] = 0;
j->http_state = HTTP_STATE_REQUEST;
}
}
gl_list_node_set_value(listener_list, node, j);
}
gl_list_iterator_free(&iter);
/* loop through all connections, closing those that are in error */
iter = gl_list_iterator(listener_list);
while (gl_list_iterator_next(&iter, &elt, &node)) {
const listener_item *j = elt;
if (j->http_state == HTTP_STATE_CLOSING) {
gl_list_remove_node(listener_list, node);
}
}
gl_list_iterator_free(&iter);
iter = gl_list_iterator(accepted_list);
while (gl_list_iterator_next(&iter, &elt, &node)) {
gl_list_add_last(listener_list, elt);
}
gl_list_iterator_free(&iter);
gl_list_free(accepted_list);
}
gnutls_certificate_free_credentials(cert_cred);
#ifdef ENABLE_SRP
if (srp_cred)
gnutls_srp_free_server_credentials(srp_cred);
#endif
#ifdef ENABLE_PSK
if (psk_cred)
gnutls_psk_free_server_credentials(psk_cred);
#endif
#ifdef ENABLE_ANON
gnutls_anon_free_server_credentials(dh_cred);
#endif
if (noticket == 0)
gnutls_free(session_ticket_key.data);
if (earlydata)
gnutls_anti_replay_deinit(anti_replay);
if (nodb == 0)
wrap_db_deinit();
gnutls_global_deinit();
}
static void cmd_parser(int argc, char **argv)
{
optionProcess(&gnutls_servOptions, argc, argv);
disable_client_cert = HAVE_OPT(DISABLE_CLIENT_CERT);
require_cert = ENABLED_OPT(REQUIRE_CLIENT_CERT);
if (HAVE_OPT(DEBUG))
debug = OPT_VALUE_DEBUG;
if (HAVE_OPT(QUIET))
verbose = 0;
if (HAVE_OPT(PRIORITY))
priorities = OPT_ARG(PRIORITY);
if (HAVE_OPT(LIST)) {
print_list(priorities, verbose);
exit(0);
}
nodb = HAVE_OPT(NODB);
noticket = HAVE_OPT(NOTICKET);
earlydata = HAVE_OPT(EARLYDATA);
if (HAVE_OPT(ECHO)) {
http = 0;
if (HAVE_OPT(CRLF))
strip_crlf = 0;
} else
http = 1;
record_max_size = OPT_VALUE_RECORDSIZE;
if (HAVE_OPT(X509FMTDER))
x509ctype = GNUTLS_X509_FMT_DER;
else
x509ctype = GNUTLS_X509_FMT_PEM;
generate = HAVE_OPT(GENERATE);
if (HAVE_OPT(DHPARAMS))
dh_params_file = OPT_ARG(DHPARAMS);
if (HAVE_OPT(ALPN)) {
alpn_protos = STACKLST_OPT(ALPN);
alpn_protos_size = STACKCT_OPT(ALPN);
}
if (HAVE_OPT(X509KEYFILE)) {
x509_keyfile = STACKLST_OPT(X509KEYFILE);
x509_keyfile_size = STACKCT_OPT(X509KEYFILE);
}
if (HAVE_OPT(X509CERTFILE)) {
x509_certfile = STACKLST_OPT(X509CERTFILE);
x509_certfile_size = STACKCT_OPT(X509CERTFILE);
}
if (x509_certfile_size != x509_keyfile_size) {
fprintf(stderr, "The certificate number provided (%u) doesn't match the keys (%u)\n",
x509_certfile_size, x509_keyfile_size);
exit(1);
}
if (HAVE_OPT(X509CAFILE))
x509_cafile = OPT_ARG(X509CAFILE);
if (HAVE_OPT(X509CRLFILE))
x509_crlfile = OPT_ARG(X509CRLFILE);
if (HAVE_OPT(RAWPKKEYFILE)) {
rawpk_keyfile = STACKLST_OPT(RAWPKKEYFILE);
rawpk_keyfile_size = STACKCT_OPT(RAWPKKEYFILE);
}
if (HAVE_OPT(RAWPKFILE)) {
rawpk_file = STACKLST_OPT(RAWPKFILE);
rawpk_file_size = STACKCT_OPT(RAWPKFILE);
}
if (rawpk_file_size != rawpk_keyfile_size) {
fprintf(stderr, "The number of raw public-keys provided (%u) doesn't match the number of corresponding private keys (%u)\n",
rawpk_file_size, rawpk_keyfile_size);
exit(1);
}
if (HAVE_OPT(SRPPASSWD))
srp_passwd = OPT_ARG(SRPPASSWD);
if (HAVE_OPT(SRPPASSWDCONF))
srp_passwd_conf = OPT_ARG(SRPPASSWDCONF);
if (HAVE_OPT(PSKPASSWD))
psk_passwd = OPT_ARG(PSKPASSWD);
if (HAVE_OPT(OCSP_RESPONSE)) {
ocsp_responses = STACKLST_OPT(OCSP_RESPONSE);
ocsp_responses_size = STACKCT_OPT(OCSP_RESPONSE);
}
if (HAVE_OPT(SNI_HOSTNAME))
sni_hostname = OPT_ARG(SNI_HOSTNAME);
if (HAVE_OPT(SNI_HOSTNAME_FATAL))
sni_hostname_fatal = 1;
if (HAVE_OPT(HTTPDATA))
http_data_file = OPT_ARG(HTTPDATA);
}
/* session resuming support */
#define SESSION_ID_SIZE 128
#define SESSION_DATA_SIZE (16*1024)
typedef struct {
unsigned char session_id[SESSION_ID_SIZE];
unsigned int session_id_size;
gnutls_datum_t session_data;
} CACHE;
static CACHE *cache_db;
static int cache_db_ptr;
static int cache_db_alloc;
static void wrap_db_init(void)
{
}
static void wrap_db_deinit(void)
{
int i;
for (i = 0; i < cache_db_ptr; i++)
free(cache_db[i].session_data.data);
free(cache_db);
}
static int
wrap_db_store(void *dbf, gnutls_datum_t key, gnutls_datum_t data)
{
int i;
time_t now = time(0);
if (key.size > SESSION_ID_SIZE)
return GNUTLS_E_DB_ERROR;
if (data.size > SESSION_DATA_SIZE)
return GNUTLS_E_DB_ERROR;
if (cache_db_ptr < cache_db_alloc)
i = cache_db_ptr++;
else {
/* find empty or expired slot to store the new entry */
for (i = 0; i < cache_db_ptr; i++)
if (cache_db[i].session_id_size == 0 ||
!(now <
gnutls_db_check_entry_expire_time(&cache_db[i].
session_data)))
break;
if (i == cache_db_ptr) {
/* try to allocate additional slots */
if (cache_db_ptr == ssl_session_cache) {
fprintf(stderr,
"Error: too many sessions\n");
return GNUTLS_E_DB_ERROR;
}
cache_db_alloc = cache_db_alloc * 2 + 1;
cache_db = realloc(cache_db,
cache_db_alloc * sizeof(CACHE));
if (!cache_db)
return GNUTLS_E_MEMORY_ERROR;
memset(cache_db + cache_db_ptr, 0,
(cache_db_alloc - cache_db_ptr) * sizeof(CACHE));
cache_db_ptr++;
}
}
memcpy(cache_db[i].session_id, key.data, key.size);
cache_db[i].session_id_size = key.size;
/* resize the data slot if needed */
if (cache_db[i].session_data.size < data.size) {
cache_db[i].session_data.data =
realloc(cache_db[i].session_data.data,
data.size);
if (!cache_db[i].session_data.data)
return GNUTLS_E_MEMORY_ERROR;
}
memcpy(cache_db[i].session_data.data, data.data, data.size);
cache_db[i].session_data.size = data.size;
return 0;
}
static gnutls_datum_t wrap_db_fetch(void *dbf, gnutls_datum_t key)
{
gnutls_datum_t res = { NULL, 0 };
time_t now = time(0);
int i;
for (i = 0; i < cache_db_ptr; i++) {
if (key.size == cache_db[i].session_id_size &&
memcmp(key.data, cache_db[i].session_id,
key.size) == 0 &&
now < gnutls_db_check_entry_expire_time(&cache_db[i].
session_data)) {
res.size = cache_db[i].session_data.size;
res.data = malloc(res.size);
if (res.data == NULL)
return res;
memcpy(res.data, cache_db[i].session_data.data,
res.size);
return res;
}
}
return res;
}
static int wrap_db_delete(void *dbf, gnutls_datum_t key)
{
int i;
for (i = 0; i < cache_db_ptr; i++) {
if (key.size == cache_db[i].session_id_size &&
memcmp(key.data, cache_db[i].session_id,
key.size) == 0) {
cache_db[i].session_id_size = 0;
free(cache_db[i].session_data.data);
cache_db[i].session_data.data = NULL;
cache_db[i].session_data.size = 0;
return 0;
}
}
return GNUTLS_E_DB_ERROR;
}
static int
anti_replay_db_add(void *dbf, time_t exp, const gnutls_datum_t *key, const gnutls_datum_t *data)
{
time_t now = time(0);
int i;
for (i = 0; i < cache_db_ptr; i++) {
if (key->size == cache_db[i].session_id_size &&
memcmp(key->data, cache_db[i].session_id,
key->size) == 0 &&
now < gnutls_db_check_entry_expire_time(&cache_db[i].
session_data))
return GNUTLS_E_DB_ENTRY_EXISTS;
}
return wrap_db_store(dbf, *key, *data);
}
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