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|
/*
* Copyright (C) 2004-2012 Free Software Foundation, Inc.
* Copyright (C) 2001,2002 Paul Sheer
* 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 <http://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 "serv-args.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 <gnutls/openpgp.h>
#include <sys/time.h>
#include <sys/select.h>
#include <fcntl.h>
#include <list.h>
#include <netdb.h>
#include <unistd.h>
#include <socket.h>
/* Gnulib portability files. */
#include "read-file.h"
#include "minmax.h"
#include "sockets.h"
#include "udp-serv.h"
/* konqueror cannot handle sending the page in multiple
* pieces.
*/
/* global stuff */
static int generate = 0;
static int http = 0;
static int x509ctype;
static int debug = 0;
unsigned int verbose = 1;
static int nodb;
static int noticket;
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 *pgp_keyring = NULL;
const char *pgp_keyfile = NULL;
const char *pgp_certfile = NULL;
const char *x509_keyfile = NULL;
const char *x509_certfile = NULL;
const char *x509_dsakeyfile = NULL;
const char *x509_dsacertfile = NULL;
const char *x509_ecckeyfile = NULL;
const char *x509_ecccertfile = NULL;
const char *x509_cafile = NULL;
const char *dh_params_file = NULL;
const char *x509_crlfile = NULL;
const char *priorities = NULL;
const char *status_response_ocsp = NULL;
const char *sni_hostname = NULL;
int sni_hostname_fatal = 0;
gnutls_datum_t session_ticket_key;
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(stdout, "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;
gnutls_anon_server_credentials_t dh_cred = NULL;
gnutls_certificate_credentials_t 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_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 void cmd_parser(int argc, char **argv);
#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 listen_socket; int fd;
gnutls_session_t tls_session;
int handshake_ok;
int no_close;
time_t start;
);
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)
{
free(j->http_request);
free(j->http_response);
if (j->fd >= 0) {
if (j->no_close == 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_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 *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 = (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 char pkcs3[] =
"-----BEGIN DH PARAMETERS-----\n"
"MIGGAoGAtkxw2jlsVCsrfLqxrN+IrF/3W8vVFvDzYbLmxi2GQv9s/PQGWP1d9i22\n"
"P2DprfcJknWt7KhCI1SaYseOQIIIAYP78CfyIpGScW/vS8khrw0rlQiyeCvQgF3O\n"
"GeGOEywcw+oQT4SmFOD7H0smJe2CNyjYpexBXQ/A0mbTF9QKm1cCAQU=\n"
"-----END DH PARAMETERS-----\n";
static int static_dh_params(void)
{
gnutls_datum_t params = { (void *) pkcs3, sizeof(pkcs3) };
int ret;
if (gnutls_dh_params_init(&dh_params) < 0) {
fprintf(stderr, "Error in dh parameter initialization\n");
exit(1);
}
ret = gnutls_dh_params_import_pkcs3(dh_params, ¶ms,
GNUTLS_X509_FMT_PEM);
if (ret < 0) {
fprintf(stderr, "Error parsing dh params: %s\n",
safe_strerror(ret));
exit(1);
}
printf
("Set static Diffie-Hellman parameters, consider --dhparams.\n");
return 0;
}
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;
}
LIST_DECLARE_INIT(listener_list, listener_item, listener_free);
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 (require_cert || 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;
}
gnutls_session_t initialize_session(int dtls)
{
gnutls_session_t session;
int ret;
const char *err;
if (priorities == NULL)
priorities = "NORMAL";
if (dtls)
gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
else
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);
}
#ifdef ENABLE_SESSION_TICKETS
if (noticket == 0)
gnutls_session_ticket_enable_server(session,
&session_ticket_key);
#endif
if (sni_hostname != NULL)
gnutls_handshake_set_post_client_hello_function(session,
&post_client_hello);
if (gnutls_priority_set_direct(session, priorities, &err) < 0) {
fprintf(stderr, "Syntax error at: %s\n", err);
exit(1);
}
gnutls_credentials_set(session, GNUTLS_CRD_ANON, dh_cred);
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);
}
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=\"http://www.gnutls.org/\">http://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;
gnutls_kx_algorithm_t kx_alg;
size_t len = 20 * 1024 + strlen(header);
char *crtinfo = NULL, *crtinfo_old = NULL;
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_get(session) == 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;
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>";
crtinfo_old = crtinfo;
crtinfo =
realloc(crtinfo,
ncrtinfo + info.size +
strlen(post) + 1);
if (crtinfo == NULL) {
free(crtinfo_old);
return NULL;
}
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);
}
}
}
http_buffer = malloc(len);
if (http_buffer == NULL) {
free(crtinfo);
return NULL;
}
strcpy(http_buffer, HTTP_BEGIN);
/* 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 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) {
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) {
snprintf(tmp_buffer, tmp_buffer_size,
"<p>Connected as user '%s'.</p>\n",
gnutls_psk_server_get_username(session));
}
#endif
#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 (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));
}
/* print session information */
strcat(http_buffer, "<P>\n");
tmp =
gnutls_protocol_get_name(gnutls_protocol_get_version(session));
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);
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;
snprintf(tmp_buffer, tmp_buffer_size,
"<TR><TD>Certificate Type:</TD><TD>%s</TD></TR>\n",
tmp);
}
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);
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_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);
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></p></TABLE>\n",
tmp);
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;
}
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)
{
listener_item *j;
fd_set rd, wr;
int n, sock = -1;
FD_ZERO(&rd);
FD_ZERO(&wr);
n = 0;
lloopstart(listener_list, j) {
if (j->listen_socket) {
FD_SET(j->fd, &rd);
n = MAX(n, j->fd);
}
}
lloopend(listener_list, j);
/* 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 */
lloopstart(listener_list, j) {
/* a new connection has arrived */
if (FD_ISSET(j->fd, &rd) && j->listen_socket) {
sock = j->fd;
break;
}
}
lloopend(listener_list, j);
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
#ifdef AI_ADDRCONFIG
| AI_ADDRCONFIG
#endif
;
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: */
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 */
lappend(listener_list);
j = listener_list.tail;
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 + 1] == 0) {
data[i] = '\n';
data[i + 1] = 0;
break;
}
}
}
static void
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';
}
/* *response = peer_print_info(session, request+4, h, response_length); */
if (http != 0) {
*response = peer_print_info(session, response_length, h);
} else {
strip(request);
fprintf(stderr, "received: %s\n", request);
if (check_command(session, request)) {
*response = NULL;
*response_length = 0;
return;
}
*response = strdup(request);
*response_length = ((*response) ? strlen(*response) : 0);
}
return;
unimplemented:
*response = strdup(HTTP_UNIMPLEMENTED);
*response_length = ((*response) ? strlen(*response) : 0);
}
static void terminate(int sig) __attribute__ ((noreturn));
static void terminate(int sig)
{
fprintf(stderr, "Exiting via signal %d\n", sig);
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;
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();
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 {
static_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);
}
}
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);
}
}
#ifdef ENABLE_OPENPGP
if (pgp_keyring != NULL) {
ret =
gnutls_certificate_set_openpgp_keyring_file(cert_cred,
pgp_keyring,
GNUTLS_OPENPGP_FMT_BASE64);
if (ret < 0) {
fprintf(stderr,
"Error setting the OpenPGP keyring file\n");
GERR(ret);
}
}
if (pgp_certfile != NULL && pgp_keyfile != NULL) {
if (HAVE_OPT(PGPSUBKEY))
ret = gnutls_certificate_set_openpgp_key_file2
(cert_cred, pgp_certfile, pgp_keyfile,
OPT_ARG(PGPSUBKEY),
GNUTLS_OPENPGP_FMT_BASE64);
else
ret = gnutls_certificate_set_openpgp_key_file
(cert_cred, pgp_certfile, pgp_keyfile,
GNUTLS_OPENPGP_FMT_BASE64);
if (ret < 0) {
fprintf(stderr,
"Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
ret, pgp_certfile, pgp_keyfile);
GERR(ret);
} else
cert_set = 1;
}
#endif
if (x509_certfile != NULL && x509_keyfile != NULL) {
ret = gnutls_certificate_set_x509_key_file
(cert_cred, x509_certfile, x509_keyfile, x509ctype);
if (ret < 0) {
fprintf(stderr,
"Error reading '%s' or '%s'\n",
x509_certfile, x509_keyfile);
GERR(ret);
exit(1);
} else
cert_set = 1;
}
if (x509_dsacertfile != NULL && x509_dsakeyfile != NULL) {
ret = gnutls_certificate_set_x509_key_file
(cert_cred, x509_dsacertfile, x509_dsakeyfile,
x509ctype);
if (ret < 0) {
fprintf(stderr,
"Error reading '%s' or '%s'\n",
x509_dsacertfile, x509_dsakeyfile);
GERR(ret);
exit(1);
} else
cert_set = 1;
}
if (x509_ecccertfile != NULL && x509_ecckeyfile != NULL) {
ret = gnutls_certificate_set_x509_key_file
(cert_cred, x509_ecccertfile, x509_ecckeyfile,
x509ctype);
if (ret < 0) {
fprintf(stderr,
"Error reading '%s' or '%s'\n",
x509_ecccertfile, x509_ecckeyfile);
GERR(ret);
exit(1);
} else
cert_set = 1;
}
if (cert_set == 0) {
fprintf(stderr,
"Warning: no private key and certificate pairs were set.\n");
}
/* OCSP status-request TLS extension */
if (status_response_ocsp) {
if (gnutls_certificate_set_ocsp_status_request_file
(cert_cred, status_response_ocsp, 0) < 0) {
fprintf(stderr,
"Cannot set OCSP status request file: %s\n",
gnutls_strerror(ret));
exit(1);
}
}
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
/* 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);
}
}
gnutls_psk_set_server_params_function(psk_cred,
get_params);
}
#endif
#ifdef ENABLE_ANON
gnutls_anon_allocate_server_credentials(&dh_cred);
gnutls_anon_set_server_params_function(dh_cred, get_params);
/* gnutls_anon_set_server_dh_params(dh_cred, dh_params); */
#endif
#ifdef ENABLE_SESSION_TICKETS
if (noticket == 0)
gnutls_session_ticket_key_generate(&session_ticket_key);
#endif
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\n");
GERR(r);
do {
ret = gnutls_alert_send_appropriate(j->tls_session, r);
} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
j->no_close = 1;
} 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);
}
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);
GERR(r);
j->http_state = HTTP_STATE_CLOSING;
} else {
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 (;;) {
listener_item *j;
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 */
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->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);
}
}
lloopend(listener_list, j);
/* 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 */
lloopstart(listener_list, j) {
/* 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 {
time_t tt = time(0);
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->start = tt;
j->tls_session = initialize_session(0);
gnutls_session_set_ptr(j->tls_session, j);
gnutls_transport_set_int
(j->tls_session, accept_fd);
set_read_funcs(j->tls_session);
j->handshake_ok = 0;
j->no_close = 0;
if (verbose != 0) {
ctt = ctime(&tt);
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[1024];
int r;
if (j->handshake_ok == 0) {
retry_handshake(j);
}
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) {
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->no_close = 1;
}
}
} 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")) {
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) {
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->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;
}
}
}
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
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 (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);
if (HAVE_OPT(ECHO))
http = 0;
else
http = 1;
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(X509KEYFILE))
x509_keyfile = OPT_ARG(X509KEYFILE);
if (HAVE_OPT(X509CERTFILE))
x509_certfile = OPT_ARG(X509CERTFILE);
if (HAVE_OPT(X509DSAKEYFILE))
x509_dsakeyfile = OPT_ARG(X509DSAKEYFILE);
if (HAVE_OPT(X509DSACERTFILE))
x509_dsacertfile = OPT_ARG(X509DSACERTFILE);
if (HAVE_OPT(X509ECCKEYFILE))
x509_ecckeyfile = OPT_ARG(X509ECCKEYFILE);
if (HAVE_OPT(X509ECCCERTFILE))
x509_ecccertfile = OPT_ARG(X509ECCCERTFILE);
if (HAVE_OPT(X509CAFILE))
x509_cafile = OPT_ARG(X509CAFILE);
if (HAVE_OPT(X509CRLFILE))
x509_crlfile = OPT_ARG(X509CRLFILE);
if (HAVE_OPT(PGPKEYFILE))
pgp_keyfile = OPT_ARG(PGPKEYFILE);
if (HAVE_OPT(PGPCERTFILE))
pgp_certfile = OPT_ARG(PGPCERTFILE);
if (HAVE_OPT(PGPKEYRING))
pgp_keyring = OPT_ARG(PGPKEYRING);
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))
status_response_ocsp = OPT_ARG(OCSP_RESPONSE);
if (HAVE_OPT(SNI_HOSTNAME))
sni_hostname = OPT_ARG(SNI_HOSTNAME);
if (HAVE_OPT(SNI_HOSTNAME_FATAL))
sni_hostname_fatal = 1;
}
/* 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_t key, gnutls_datum_t 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_t wrap_db_fetch(void *dbf, gnutls_datum_t key)
{
gnutls_datum_t 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_t 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;
}
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