/*
Main
*/
int main(int argc, char ** argv)
{
struct sockaddr_in inaddr;
socklen_t inaddrlen;
struct timeval timeout;
ssl_t *ssl;
serverDtls_t *dtlsCtx;
SOCKET sock;
fd_set readfd;
unsigned char *sslBuf, *recvfromBuf, *CAstream;
#ifdef USE_DTLS_DEBUG_TRACE
unsigned char *addrstr;
#endif
#if !defined(ID_PSK) && !defined(ID_DHE_PSK)
unsigned char *keyValue, *certValue;
int32 keyLen, certLen;
#endif
sslKeys_t *keys;
int32 freeBufLen, rc, val, recvLen, err, CAstreamLen;
int32 sslBufLen, rcr, rcs, sendLen, recvfromBufLen;
sslSessOpts_t options;
#ifdef WIN32
WSADATA wsaData;
WSAStartup(MAKEWORD(1, 1), &wsaData);
#endif
rc = 0;
ssl = NULL;
dtlsCtx = NULL;
sock = INVALID_SOCKET;
/* parse input arguments */
if (0 != process_cmd_options(argc, argv)) {
usage();
return 0;
}
if (sigsetup() < 0) {
_psTrace("Init error creating signal handlers\n");
return DTLS_FATAL;
}
if (matrixSslOpen() < 0) {
_psTrace("Init error opening MatrixDTLS library\n");
return DTLS_FATAL;
}
if (matrixSslNewKeys(&keys, NULL) < 0) {
_psTrace("Init error allocating key structure\n");
matrixSslClose();
return DTLS_FATAL;
}
if ((rc = initClientList(MAX_CLIENTS)) < 0) {
_psTrace("Init error opening client list\n");
goto MATRIX_EXIT;
}
recvfromBufLen = matrixDtlsGetPmtu();
if ((recvfromBuf = psMalloc(MATRIX_NO_POOL, recvfromBufLen)) == NULL) {
rc = PS_MEM_FAIL;
_psTrace("Init error allocating receive buffer\n");
goto CLIENT_EXIT;
}
#ifdef USE_HEADER_KEYS
/*
In-memory based keys
Build the CA list first for potential client auth usage
*/
CAstreamLen = 0;
#ifdef USE_RSA
CAstreamLen += sizeof(RSACAS);
#ifdef USE_ECC
CAstreamLen += sizeof(ECDHRSACAS);
#endif
#endif
#ifdef USE_ECC
CAstreamLen += sizeof(ECCAS);
#endif
CAstream = psMalloc(NULL, CAstreamLen);
CAstreamLen = 0;
#ifdef USE_RSA
memcpy(CAstream, RSACAS, sizeof(RSACAS));
CAstreamLen += sizeof(RSACAS);
#ifdef USE_ECC
memcpy(CAstream + CAstreamLen, ECDHRSACAS, sizeof(ECDHRSACAS));
CAstreamLen += sizeof(ECDHRSACAS);
#endif
#endif
#ifdef USE_ECC
memcpy(CAstream + CAstreamLen, ECCAS, sizeof(ECCAS));
CAstreamLen += sizeof(ECCAS);
#endif
#ifdef EXAMPLE_RSA_KEYS
switch (g_rsaKeySize) {
case 1024:
certValue = (unsigned char *)RSA1024;
certLen = sizeof(RSA1024);
keyValue = (unsigned char *)RSA1024KEY;
keyLen = sizeof(RSA1024KEY);
break;
case 2048:
certValue = (unsigned char *)RSA2048;
certLen = sizeof(RSA2048);
keyValue = (unsigned char *)RSA2048KEY;
keyLen = sizeof(RSA2048KEY);
break;
case 3072:
certValue = (unsigned char *)RSA3072;
certLen = sizeof(RSA3072);
keyValue = (unsigned char *)RSA3072KEY;
keyLen = sizeof(RSA3072KEY);
break;
case 4096:
certValue = (unsigned char *)RSA4096;
certLen = sizeof(RSA4096);
keyValue = (unsigned char *)RSA4096KEY;
keyLen = sizeof(RSA4096KEY);
break;
default:
_psTraceInt("Invalid RSA key length (%d)\n", g_rsaKeySize);
return -1;
}
if ((rc = matrixSslLoadRsaKeysMem(keys, (const unsigned char *)certValue,
certLen, (const unsigned char *)keyValue, keyLen, CAstream,
CAstreamLen)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_ECDH_RSA_KEYS
switch (g_ecdhKeySize) {
case 256:
certValue = (unsigned char *)ECDHRSA256;
certLen = sizeof(ECDHRSA256);
keyValue = (unsigned char *)ECDHRSA256KEY;
keyLen = sizeof(ECDHRSA256KEY);
break;
case 521:
certValue = (unsigned char *)ECDHRSA521;
certLen = sizeof(ECDHRSA521);
keyValue = (unsigned char *)ECDHRSA521KEY;
keyLen = sizeof(ECDHRSA521KEY);
break;
default:
_psTraceInt("Invalid ECDH_RSA key length (%d)\n", g_ecdhKeySize);
return -1;
}
if ((rc = matrixSslLoadEcKeysMem(keys, (const unsigned char *)certValue,
certLen, (const unsigned char *)keyValue, keyLen, CAstream,
CAstreamLen)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_EC_KEYS
switch (g_eccKeySize) {
case 192:
certValue = (unsigned char *)EC192;
certLen = sizeof(EC192);
keyValue = (unsigned char *)EC192KEY;
keyLen = sizeof(EC192KEY);
break;
case 224:
certValue = (unsigned char *)EC224;
certLen = sizeof(EC224);
keyValue = (unsigned char *)EC224KEY;
keyLen = sizeof(EC224KEY);
break;
case 256:
certValue = (unsigned char *)EC256;
certLen = sizeof(EC256);
keyValue = (unsigned char *)EC256KEY;
keyLen = sizeof(EC256KEY);
break;
case 384:
certValue = (unsigned char *)EC384;
certLen = sizeof(EC384);
keyValue = (unsigned char *)EC384KEY;
keyLen = sizeof(EC384KEY);
break;
case 521:
certValue = (unsigned char *)EC521;
certLen = sizeof(EC521);
keyValue = (unsigned char *)EC521KEY;
keyLen = sizeof(EC521KEY);
break;
default:
_psTraceInt("Invalid ECC key length (%d)\n", g_eccKeySize);
return -1;
}
if ((rc = matrixSslLoadEcKeysMem(keys, certValue, certLen,
keyValue, keyLen, CAstream, CAstreamLen)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef REQUIRE_DH_PARAMS
if (matrixSslLoadDhParamsMem(keys, DHPARAM2048, DHPARAM2048_SIZE)
< 0) {
_psTrace("Unable to load DH parameters\n");
}
#endif /* DH_PARAMS */
psFree(CAstream, NULL);
#else /* USE_HEADER_KEYS */
/*
File based keys
Build the CA list first for potential client auth usage
*/
CAstreamLen = 0;
#ifdef USE_RSA
if (g_rsaKeySize == 3072)
CAstreamLen += (int32)strlen(rsaCA3072File) + 1;
else
CAstreamLen += (int32)strlen(rsaCAFile) + 1;
#ifdef USE_ECC
CAstreamLen += (int32)strlen(ecdhRsaCAFile) + 1;
#endif
#endif
#ifdef USE_ECC
CAstreamLen += (int32)strlen(ecCAFile) + 1;
#endif
CAstream = psMalloc(NULL, CAstreamLen);
memset(CAstream, 0x0, CAstreamLen);
CAstreamLen = 0;
#ifdef USE_RSA
if (g_rsaKeySize == 3072) {
memcpy(CAstream, rsaCA3072File, strlen(rsaCA3072File));
CAstreamLen += strlen(rsaCA3072File);
}
else {
memcpy(CAstream, rsaCAFile, strlen(rsaCAFile));
CAstreamLen += strlen(rsaCAFile);
}
#ifdef USE_ECC
memcpy(CAstream + CAstreamLen, ";", 1); CAstreamLen++;
memcpy(CAstream + CAstreamLen, ecdhRsaCAFile, strlen(ecdhRsaCAFile));
CAstreamLen += strlen(ecdhRsaCAFile);
#endif
#endif
#ifdef USE_ECC
if (CAstreamLen > 0) {
memcpy(CAstream + CAstreamLen, ";", 1); CAstreamLen++;
}
memcpy(CAstream + CAstreamLen, ecCAFile, strlen(ecCAFile));
#endif
/* Load Identiy */
#ifdef EXAMPLE_RSA_KEYS
if ((rc = matrixSslLoadRsaKeys(keys, rsaCertFile, rsaPrivkeyFile, NULL,
(char*)CAstream)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_ECDH_RSA_KEYS
if ((rc = matrixSslLoadEcKeys(keys, ecdhRsaCertFile, ecdhRsaPrivkeyFile,
NULL, (char*)CAstream)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_EC_KEYS
if ((rc = matrixSslLoadEcKeys(keys, ecCertFile, ecPrivkeyFile, NULL,
(char*)CAstream)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef REQUIRE_DH_PARAMS
if (matrixSslLoadDhParams(keys, dhParamFile) < 0) {
_psTrace("Unable to load DH parameters\n");
}
#endif
psFree(CAstream);
#endif /* USE_HEADER_KEYS */
#ifdef USE_PSK_CIPHER_SUITE
/* The first ID is considered as null-terminiated string for
compatibility with OpenSSL's s_client default client identity
"Client_identity" */
matrixSslLoadPsk(keys,
PSK_HEADER_TABLE[0].key,
sizeof(PSK_HEADER_TABLE[0].key),
PSK_HEADER_TABLE[0].id,
strlen((const char *)PSK_HEADER_TABLE[0].id));
for (rc = 1; rc < PSK_HEADER_TABLE_COUNT; rc++) {
matrixSslLoadPsk(keys,
PSK_HEADER_TABLE[rc].key,
sizeof(PSK_HEADER_TABLE[rc].key),
PSK_HEADER_TABLE[rc].id,
sizeof(PSK_HEADER_TABLE[rc].id));
}
#endif /* PSK */
if ((sock = newUdpSocket(NULL, DTLS_PORT, &err)) == INVALID_SOCKET) {
_psTrace("Error creating UDP socket\n");
goto DTLS_EXIT;
}
_psTraceInt("DTLS server running on port %d\n", DTLS_PORT);
/*
Server loop
*/
for (exitFlag = 0; exitFlag == 0;) {
timeout.tv_sec = 1;
timeout.tv_usec = 0;
FD_ZERO(&readfd);
FD_SET(sock, &readfd);
/*
Always just wait a second for any incoming data. The primary loop
mechanism reads data from one source and replies with handshake data
if needed (that reply may be a resend if reading a repeat message).
Individual client timeouts are then handled
*/
val = select(sock+1, &readfd, NULL, NULL, &timeout);
if (val > 0 && FD_ISSET(sock, &readfd)) {
psTraceIntDtls("Select woke %d\n", val);
/* recvfrom data must always go into generic buffer becuase we
don't yet know who it is from */
inaddrlen = sizeof(struct sockaddr_in);
if ((recvLen = (int32)recvfrom(sock, recvfromBuf, recvfromBufLen, 0,
(struct sockaddr *)&inaddr, &inaddrlen)) < 0) {
#ifdef WIN32
if (SOCKET_ERRNO != EWOULDBLOCK &&
SOCKET_ERRNO != WSAECONNRESET) {
#else
if (SOCKET_ERRNO != EWOULDBLOCK) {
#endif
_psTraceInt("recvfrom error %d. Exiting\n", SOCKET_ERRNO);
goto DTLS_EXIT;
}
continue;
}
#ifdef USE_DTLS_DEBUG_TRACE
/* nice for debugging */
{
const char *addrstr;
addrstr = getaddrstring((struct sockaddr *)&inaddr, 1);
psTraceIntDtls("Read %d bytes ", recvLen);
psTraceStrDtls("from %s\n", (char*)addrstr);
psFree(addrstr, NULL);
}
#endif
/* Locate the SSL context of this receive and create a new session
if not found */
if ((dtlsCtx = findClient(inaddr)) == NULL) {
memset(&options, 0x0, sizeof(sslSessOpts_t));
options.versionFlag = SSL_FLAGS_DTLS;
options.truncHmac = -1;
if (matrixSslNewServerSession(&ssl, keys,
certValidator, &options) < 0) {
rc = DTLS_FATAL; goto DTLS_EXIT;
}
if ((dtlsCtx = registerClient(inaddr, sock, ssl)) == NULL) {
/* Client list is full. Just have to ignore */
matrixSslDeleteSession(ssl);
continue;
}
}
ssl = dtlsCtx->ssl;
/* Move socket data into internal buffer */
freeBufLen = matrixSslGetReadbuf(ssl, &sslBuf);
psAssert(freeBufLen >= recvLen);
psAssert(freeBufLen == matrixDtlsGetPmtu());
memcpy(sslBuf, recvfromBuf, recvLen);
/* Notify SSL state machine that we've received more data into the
ssl buffer retreived with matrixSslGetReadbuf. */
if ((rcr = matrixSslReceivedData(ssl, recvLen, &sslBuf,
(uint32*)&freeBufLen)) < 0) {
clearClient(dtlsCtx);
continue; /* Next connection */
}
/* Update last activity time and reset timeout*/
psGetTime(&dtlsCtx->lastRecvTime, NULL);
dtlsCtx->timeout = MIN_WAIT_SECS;
PROCESS_MORE_FROM_BUFFER:
/* Process any incoming plaintext application data */
switch (rcr) {
case MATRIXSSL_HANDSHAKE_COMPLETE:
/* This is a resumed handshake case which means we are
the last to receive handshake flights and we know the
handshake is complete. However, the internal workings
will not flag us officially complete until we receive
application data from the peer so we need a local flag
to handle this case so we are not resending our final
flight */
dtlsCtx->connStatus = RESUMED_HANDSHAKE_COMPLETE;
psTraceDtls("Got HANDSHAKE_COMPLETE out of ReceivedData\n");
break;
case MATRIXSSL_APP_DATA:
/* Now safe to clear the connStatus flag that was keeping
track of the state between receiving the final flight of
a resumed handshake and receiving application data. The
reciept of app data has now internally disabled flight
resends */
dtlsCtx->connStatus = 0;
_psTrace("Client connected. Received...\n");
_psTraceStr("%s\n", (char*)sslBuf);
break;
case MATRIXSSL_REQUEST_SEND:
/* Still handshaking with this particular client */
while ((sslBufLen = matrixDtlsGetOutdata(ssl,
&sslBuf)) > 0) {
if ((sendLen = udpSend(dtlsCtx->fd, sslBuf, sslBufLen,
(struct sockaddr*)&inaddr,
sizeof(struct sockaddr_in),
dtlsCtx->timeout,
packet_loss_prob,
NULL)) < 0) {
psTraceDtls("udpSend error. Ignoring\n");
}
/* Always indicate the entire datagram was sent as
there is no way for DTLS to handle partial records.
Resends and timeouts will handle any problems */
rcs = matrixDtlsSentData(ssl, sslBufLen);
if (rcs == MATRIXSSL_REQUEST_CLOSE) {
psTraceDtls("Got REQUEST_CLOSE out of SentData\n");
clearClient(dtlsCtx);
break;
}
if (rcs == MATRIXSSL_HANDSHAKE_COMPLETE) {
/* This is the standard handshake case */
_psTrace("Got HANDSHAKE_COMPLETE from SentData\n");
break;
}
/* SSL_REQUEST_SEND is handled by loop logic */
}
break;
case MATRIXSSL_REQUEST_RECV:
psTraceDtls("Got REQUEST_RECV from ReceivedData\n");
break;
case MATRIXSSL_RECEIVED_ALERT:
/* The first byte of the buffer is the level */
/* The second byte is the description */
if (*sslBuf == SSL_ALERT_LEVEL_FATAL) {
psTraceIntDtls("Fatal alert: %d, closing connection.\n",
*(sslBuf + 1));
clearClient(dtlsCtx);
continue; /* Next connection */
}
/* Closure alert is normal (and best) way to close */
if (*(sslBuf + 1) == SSL_ALERT_CLOSE_NOTIFY) {
clearClient(dtlsCtx);
continue; /* Next connection */
}
psTraceIntDtls("Warning alert: %d\n", *(sslBuf + 1));
if ((rcr = matrixSslProcessedData(ssl, &sslBuf,
(uint32*)&freeBufLen)) == 0) {
continue;
}
goto PROCESS_MORE_FROM_BUFFER;
default:
continue; /* Next connection */
}
} else if (val < 0) {
if (SOCKET_ERRNO != EINTR) {
psTraceIntDtls("unhandled error %d from select", SOCKET_ERRNO);
}
}
/*
Have either timed out waiting for a read or have processed a single
recv. Now check to see if any timeout resends are required
*/
rc = handleResends(sock);
} /* Main Select Loop */
DTLS_EXIT:
psFree(recvfromBuf, NULL);
CLIENT_EXIT:
closeClientList();
MATRIX_EXIT:
matrixSslDeleteKeys(keys);
matrixSslClose();
if (sock != INVALID_SOCKET) close(sock);
return rc;
}
/******************************************************************************/
/*
Work through client list and resend handshake flight if haven't heard
from them in a while
*/
static int32 handleResends(SOCKET sock)
{
serverDtls_t *dtlsCtx;
ssl_t *ssl;
psTime_t now;
unsigned char *sslBuf;
int16 i;
int32 sendLen, rc;
uint32 timeout, sslBufLen, clientCount;
clientCount = 0; /* return code is number of active clients or < 0 on error */
psGetTime(&now, NULL);
for (i = 0; i < tableSize; i++) {
dtlsCtx = &clientTable[i];
if (dtlsCtx->ssl != NULL) {
clientCount++;
timeout = psDiffMsecs(dtlsCtx->lastRecvTime, now, NULL) / 1000;
/* Haven't heard from this client in a while. Might need resend */
if (timeout > dtlsCtx->timeout) {
/* if timeout is too great. clear conn */
if (dtlsCtx->timeout >= MAX_WAIT_SECS) {
clearClient(dtlsCtx);
clientCount--;
break;
}
/* Increase the timeout for next pass */
dtlsCtx->timeout *= 2;
/* If we are in a RESUMED_HANDSHAKE_COMPLETE state that means
we are positive the handshake is complete so we don't want to
resend no matter what. This is an interim state before the
internal mechaism sees an application data record and flags
us as complete officially */
if (dtlsCtx->connStatus == RESUMED_HANDSHAKE_COMPLETE) {
psTraceDtls("Connected but awaiting data\n");
continue;
}
ssl = dtlsCtx->ssl;
while ((sslBufLen = matrixDtlsGetOutdata(ssl,
&sslBuf)) > 0) {
if ((sendLen = udpSend(dtlsCtx->fd, sslBuf, sslBufLen,
(struct sockaddr*)&dtlsCtx->addr,
sizeof(struct sockaddr_in),
dtlsCtx->timeout / 2,
packet_loss_prob,
NULL)) < 0) {
psTraceDtls("udpSend error. Ignoring\n");
}
/* Always indicate the entire datagram was sent as
there is no way for DTLS to handle partial records.
Resends and timeouts will handle any problems */
if ((rc = matrixDtlsSentData(ssl, sslBufLen)) < 0) {
psTraceDtls("internal error\n");
clearClient(dtlsCtx);
clientCount--;
break;
}
if (rc == MATRIXSSL_REQUEST_CLOSE) {
psTraceDtls("Got REQUEST_CLOSE out of SentData\n");
clearClient(dtlsCtx);
clientCount--;
break;
}
if (rc == MATRIXSSL_HANDSHAKE_COMPLETE) {
/* This is the standard handshake case */
psTraceDtls("Got HANDSHAKE_COMPLETE out of SentData\n");
break;
}
/* SSL_REQUEST_SEND is handled by loop logic */
}
}
}
}
return clientCount;
}
/*
Non-blocking socket event handler
Wait one time in select for events on any socket
This will accept new connections, read and write to sockets that are
connected, and close sockets as required.
*/
static int32 selectLoop(sslKeys_t *keys, SOCKET lfd)
{
httpConn_t *cp;
psTime_t now;
DLListEntry connsTmp;
DLListEntry *pList;
fd_set readfd, writefd;
struct timeval timeout;
SOCKET fd, maxfd;
unsigned char *buf;
int32 rc, len, transferred, val;
unsigned char rSanity, wSanity, acceptSanity;
sslSessOpts_t options;
DLListInit(&connsTmp);
rc = PS_SUCCESS;
maxfd = INVALID_SOCKET;
timeout.tv_sec = SELECT_TIME / 1000;
timeout.tv_usec = (SELECT_TIME % 1000) * 1000;
FD_ZERO(&readfd);
FD_ZERO(&writefd);
/* Always set readfd for listening socket */
FD_SET(lfd, &readfd);
if (lfd > maxfd) {
maxfd = lfd;
}
/*
Check timeouts and set readfd and writefd for connections as required.
We use connsTemp so that removal on error from the active iteration list
doesn't interfere with list traversal
*/
psGetTime(&now, NULL);
while (!DLListIsEmpty(&g_conns)) {
pList = DLListGetHead(&g_conns);
cp = DLListGetContainer(pList, httpConn_t, List);
DLListInsertTail(&connsTmp, &cp->List);
/* If timeout != 0 msec ith no new data, close */
if (cp->timeout && (psDiffMsecs(cp->time, now, NULL) >
(int32)cp->timeout)) {
closeConn(cp, PS_TIMEOUT_FAIL);
continue; /* Next connection */
}
/* Always select for read */
FD_SET(cp->fd, &readfd);
/* Select for write if there's pending write data or connection */
if (matrixSslGetOutdata(cp->ssl, NULL) > 0) {
FD_SET(cp->fd, &writefd);
}
/* Housekeeping for maxsock in select call */
if (cp->fd > maxfd) {
maxfd = cp->fd;
}
}
/* Use select to check for events on the sockets */
if ((val = select(maxfd + 1, &readfd, &writefd, NULL, &timeout)) <= 0) {
/* On error, restore global connections list */
while (!DLListIsEmpty(&connsTmp)) {
pList = DLListGetHead(&connsTmp);
cp = DLListGetContainer(pList, httpConn_t, List);
DLListInsertTail(&g_conns, &cp->List);
}
/* Select timeout */
if (val == 0) {
return PS_TIMEOUT_FAIL;
}
/* Woke due to interrupt */
if (SOCKET_ERRNO == EINTR) {
return PS_TIMEOUT_FAIL;
}
/* Should attempt to handle more errnos, such as EBADF */
return PS_PLATFORM_FAIL;
}
/* Check listener for new incoming socket connections */
if (FD_ISSET(lfd, &readfd)) {
for (acceptSanity = 0; acceptSanity < ACCEPT_QUEUE; acceptSanity++) {
fd = accept(lfd, NULL, NULL);
if (fd == INVALID_SOCKET) {
break; /* Nothing more to accept; next listener */
}
setSocketOptions(fd);
cp = malloc(sizeof(httpConn_t));
memset(cp, 0x0, sizeof(httpConn_t));
memset(&options, 0x0, sizeof(sslSessOpts_t));
options.versionFlag = g_proto;
options.userPtr = keys; /* Just a test */
//options.truncHmac = -1;
//options.maxFragLen = -1;
//options.ecFlags |= SSL_OPT_SECP521R1;
//options.ecFlags |= SSL_OPT_SECP224R1;
//options.ecFlags |= SSL_OPT_SECP384R1;
if ((rc = matrixSslNewServerSession(&cp->ssl, keys, certCb,
&options)) < 0) {
close(fd); fd = INVALID_SOCKET;
continue;
}
#ifdef USE_SERVER_NAME_INDICATION
/* Register extension callbacks to manage client connection opts */
matrixSslRegisterSNICallback(cp->ssl, SNI_callback);
#endif
#ifdef USE_ALPN
matrixSslRegisterALPNCallback(cp->ssl, ALPN_callback);
#endif
cp->fd = fd;
fd = INVALID_SOCKET;
cp->timeout = SSL_TIMEOUT;
psGetTime(&cp->time, NULL);
cp->parsebuf = NULL;
cp->parsebuflen = 0;
DLListInsertTail(&connsTmp, &cp->List);
/* Fake that there is read data available, no harm if there isn't */
FD_SET(cp->fd, &readfd);
/* _psTraceInt("=== New Client %d ===\n", cp->fd); */
}
}
/* Check each connection for read/write activity */
while (!DLListIsEmpty(&connsTmp)) {
pList = DLListGetHead(&connsTmp);
cp = DLListGetContainer(pList, httpConn_t, List);
DLListInsertTail(&g_conns, &cp->List);
rSanity = wSanity = 0;
/*
See if there's pending data to send on this connection
We could use FD_ISSET, but this is more reliable for the current
state of data to send.
*/
WRITE_MORE:
if ((len = matrixSslGetOutdata(cp->ssl, &buf)) > 0) {
/* Could get a EWOULDBLOCK since we don't check FD_ISSET */
transferred = send(cp->fd, buf, len, MSG_DONTWAIT);
if (transferred <= 0) {
#ifdef WIN32
if (SOCKET_ERRNO != EWOULDBLOCK &&
SOCKET_ERRNO != WSAEWOULDBLOCK) {
#else
if (SOCKET_ERRNO != EWOULDBLOCK) {
#endif
closeConn(cp, PS_PLATFORM_FAIL);
continue; /* Next connection */
}
} else {
/* Indicate that we've written > 0 bytes of data */
if ((rc = matrixSslSentData(cp->ssl, transferred)) < 0) {
closeConn(cp, PS_ARG_FAIL);
continue; /* Next connection */
}
if (rc == MATRIXSSL_REQUEST_CLOSE) {
closeConn(cp, MATRIXSSL_REQUEST_CLOSE);
continue; /* Next connection */
} else if (rc == MATRIXSSL_HANDSHAKE_COMPLETE) {
/* If the protocol is server initiated, send data here */
#ifdef ENABLE_FALSE_START
/* OR this could be a Chrome browser using
FALSE_START and the application data is already
waiting in our inbuf for processing */
if ((rc = matrixSslReceivedData(cp->ssl, 0,
&buf, (uint32*)&len)) < 0) {
closeConn(cp, 0);
continue; /* Next connection */
}
if (rc > 0) { /* There was leftover data */
goto PROCESS_MORE;
}
#endif /* ENABLE_FALSE_START */
}
/* Update activity time */
psGetTime(&cp->time, NULL);
/* Try to send again if more data to send */
if (rc == MATRIXSSL_REQUEST_SEND || transferred < len) {
if (wSanity++ < GOTO_SANITY) goto WRITE_MORE;
}
}
} else if (len < 0) {
closeConn(cp, PS_ARG_FAIL);
continue; /* Next connection */
}
/*
Check the file descriptor returned from select to see if the connection
has data to be read
*/
if (FD_ISSET(cp->fd, &readfd)) {
READ_MORE:
/* Get the ssl buffer and how much data it can accept */
/* Note 0 is a return failure, unlike with matrixSslGetOutdata */
if ((len = matrixSslGetReadbuf(cp->ssl, &buf)) <= 0) {
closeConn(cp, PS_ARG_FAIL);
continue; /* Next connection */
}
if ((transferred = recv(cp->fd, buf, len, MSG_DONTWAIT)) < 0) {
/* We could get EWOULDBLOCK despite the FD_ISSET on goto */
#ifdef WIN32
if (SOCKET_ERRNO != EWOULDBLOCK &&
SOCKET_ERRNO != WSAEWOULDBLOCK) {
#else
if (SOCKET_ERRNO != EWOULDBLOCK) {
#endif
closeConn(cp, PS_PLATFORM_FAIL);
}
continue; /* Next connection */
}
/* If EOF, remote socket closed. This is semi-normal closure.
Officially, we should close on closure alert. */
if (transferred == 0) {
/* psTraceIntInfo("Closing connection %d on EOF\n", cp->fd); */
closeConn(cp, 0);
continue; /* Next connection */
}
/*
Notify SSL state machine that we've received more data into the
ssl buffer retreived with matrixSslGetReadbuf.
*/
if ((rc = matrixSslReceivedData(cp->ssl, (int32)transferred, &buf,
(uint32*)&len)) < 0) {
closeConn(cp, 0);
continue; /* Next connection */
}
/* Update activity time */
psGetTime(&cp->time, NULL);
PROCESS_MORE:
/* Process any incoming plaintext application data */
switch (rc) {
case MATRIXSSL_HANDSHAKE_COMPLETE:
/* If the protocol is server initiated, send data here */
goto READ_MORE;
case MATRIXSSL_APP_DATA:
case MATRIXSSL_APP_DATA_COMPRESSED:
//psTraceBytes("DATA", buf, len);
/* Remember, must handle if len == 0! */
if ((rc = httpBasicParse(cp, buf, len, 0)) < 0) {
_psTrace("Couldn't parse HTTP data. Closing conn.\n");
closeConn(cp, PS_PROTOCOL_FAIL);
continue; /* Next connection */
}
if (cp->parsebuf != NULL) {
/* Test for one of our custom testing messages */
if (strncmp((const char*)cp->parsebuf,
"MATRIX_SHUTDOWN", 15) == 0) {
g_exitFlag = 1;
matrixSslEncodeClosureAlert(cp->ssl);
_psTrace("Got MATRIX_SHUTDOWN. Exiting\n");
goto WRITE_MORE;
}
}
/* reply to /bytes?<byte count> syntax */
if (len > 11 &&
strncmp((char *)buf, "GET /bytes?", 11) == 0) {
cp->bytes_requested = atoi((char *)buf + 11);
if (cp->bytes_requested <
strlen((char *)g_httpResponseHdr) ||
cp->bytes_requested > 1073741824) {
cp->bytes_requested =
strlen((char *)g_httpResponseHdr);
}
cp->bytes_sent = 0;
}
if (rc == HTTPS_COMPLETE) {
if (httpWriteResponse(cp) < 0) {
closeConn(cp, PS_PROTOCOL_FAIL);
continue; /* Next connection */
}
/* For HTTP, we assume no pipelined requests, so we
close after parsing a single HTTP request */
/* Ignore return of closure alert, it's optional */
matrixSslEncodeClosureAlert(cp->ssl);
rc = matrixSslProcessedData(cp->ssl, &buf, (uint32*)&len);
if (rc > 0) {
/* Additional data is available, but we ignore it */
_psTrace("HTTP data parsing not supported, ignoring.\n");
closeConn(cp, PS_SUCCESS);
continue; /* Next connection */
} else if (rc < 0) {
closeConn(cp, PS_PROTOCOL_FAIL);
continue; /* Next connection */
}
/* rc == 0, write out our response and closure alert */
goto WRITE_MORE;
}
/* We processed a partial HTTP message */
if ((rc = matrixSslProcessedData(cp->ssl, &buf, (uint32*)&len)) == 0) {
goto READ_MORE;
}
goto PROCESS_MORE;
case MATRIXSSL_REQUEST_SEND:
/* Prevent us from reading again after the write,
although that wouldn't be the end of the world */
FD_CLR(cp->fd, &readfd);
if (wSanity++ < GOTO_SANITY) goto WRITE_MORE;
break;
case MATRIXSSL_REQUEST_RECV:
if (rSanity++ < GOTO_SANITY) goto READ_MORE;
break;
case MATRIXSSL_RECEIVED_ALERT:
/* The first byte of the buffer is the level */
/* The second byte is the description */
if (*buf == SSL_ALERT_LEVEL_FATAL) {
psTraceIntInfo("Fatal alert: %d, closing connection.\n",
*(buf + 1));
closeConn(cp, PS_PROTOCOL_FAIL);
continue; /* Next connection */
}
/* Closure alert is normal (and best) way to close */
if (*(buf + 1) == SSL_ALERT_CLOSE_NOTIFY) {
closeConn(cp, PS_SUCCESS);
continue; /* Next connection */
}
psTraceIntInfo("Warning alert: %d\n", *(buf + 1));
if ((rc = matrixSslProcessedData(cp->ssl, &buf, (uint32*)&len)) == 0) {
/* No more data in buffer. Might as well read for more. */
goto READ_MORE;
}
goto PROCESS_MORE;
default:
/* If rc <= 0 we fall here */
closeConn(cp, PS_PROTOCOL_FAIL);
continue; /* Next connection */
}
/* Always try to read more if we processed some data */
if (rSanity++ < GOTO_SANITY) goto READ_MORE;
} /* readfd handling */
} /* connection loop */
return PS_SUCCESS;
}
/******************************************************************************/
/*
Create an HTTP response and encode it to the SSL buffer
*/
#define TEST_SIZE 16000
static int32 httpWriteResponse(httpConn_t *conn)
{
unsigned char *buf;
ssl_t *cp;
int32 available, len, rc;
cp = conn->ssl;
if (conn->bytes_requested) {
/* The /bytes? syntax */
while (conn->bytes_sent < conn->bytes_requested) {
len = conn->bytes_requested - conn->bytes_sent;
if (len > RESPONSE_REC_LEN) {
len = RESPONSE_REC_LEN;
}
psAssert(len > 0);
rc = matrixSslGetWritebuf(cp, &buf, len);
if (rc < len) {
len = rc; /* could have been shortened due to max_frag */
}
memset(buf, 'J', len);
if (conn->bytes_sent == 0) {
/* Overwrite first N bytes with HTTP header the first time */
strncpy((char *)buf, (char *)g_httpResponseHdr,
strlen((char*)g_httpResponseHdr));
}
if ((rc = matrixSslEncodeWritebuf(cp, len)) < 0) {
printf("couldn't encode data %d\n", rc);
}
conn->bytes_sent += len;
}
return MATRIXSSL_REQUEST_SEND;
}
/* Usual reply */
if ((available = matrixSslGetWritebuf(cp, &buf,
(uint32)strlen((char *)g_httpResponseHdr) + 1)) < 0) {
return PS_MEM_FAIL;
}
strncpy((char *)buf, (char *)g_httpResponseHdr, available);
//psTraceBytes("Replying", buf, (uint32)strlen((char *)buf));
if (matrixSslEncodeWritebuf(cp, (uint32)strlen((char *)buf)) < 0) {
return PS_MEM_FAIL;
}
return MATRIXSSL_REQUEST_SEND;
}
/******************************************************************************/
/*
Main non-blocking SSL server
Initialize MatrixSSL and sockets layer, and loop on select
*/
int32 main(int32 argc, char **argv)
{
sslKeys_t *keys;
SOCKET lfd;
unsigned char *CAstream;
int32 err, rc, CAstreamLen;
#ifdef USE_STATELESS_SESSION_TICKETS
unsigned char randKey[16];
#endif
#ifdef WIN32
WSADATA wsaData;
WSAStartup(MAKEWORD(1, 1), &wsaData);
#endif
keys = NULL;
DLListInit(&g_conns);
g_exitFlag = 0;
lfd = INVALID_SOCKET;
#ifdef POSIX
if (sighandlers() < 0) {
return PS_PLATFORM_FAIL;
}
#endif /* POSIX */
if ((rc = matrixSslOpen()) < 0) {
_psTrace("MatrixSSL library init failure. Exiting\n");
return rc;
}
if (matrixSslNewKeys(&keys, NULL) < 0) {
_psTrace("MatrixSSL library key init failure. Exiting\n");
return -1;
}
#ifdef USE_STATELESS_SESSION_TICKETS
matrixSslSetSessionTicketCallback(keys, sessTicketCb);
psGetEntropy(randKey, 16, NULL);
if (matrixSslLoadSessionTicketKeys(keys, randKey,
sessTicketSymKey, 32, sessTicketMacKey, 32) < 0) {
_psTrace("Error loading session ticket encryption key\n");
}
#endif
#ifdef USE_HEADER_KEYS
/*
In-memory based keys
Build the CA list first for potential client auth usage
*/
CAstreamLen = 0;
#ifdef USE_RSA
CAstreamLen += sizeof(RSACAS);
#ifdef USE_ECC
CAstreamLen += sizeof(ECDHRSACAS);
#endif
#endif
#ifdef USE_ECC
CAstreamLen += sizeof(ECCAS);
#endif
CAstream = psMalloc(NULL, CAstreamLen);
CAstreamLen = 0;
#ifdef USE_RSA
memcpy(CAstream, RSACAS, sizeof(RSACAS));
CAstreamLen += sizeof(RSACAS);
#ifdef USE_ECC
memcpy(CAstream + CAstreamLen, ECDHRSACAS, sizeof(ECDHRSACAS));
CAstreamLen += sizeof(ECDHRSACAS);
#endif
#endif
#ifdef USE_ECC
memcpy(CAstream + CAstreamLen, ECCAS, sizeof(ECCAS));
CAstreamLen += sizeof(ECCAS);
#endif
#ifdef EXAMPLE_RSA_KEYS
if ((rc = matrixSslLoadRsaKeysMem(keys, RSA1024, sizeof(RSA1024),
RSA1024KEY, sizeof(RSA1024KEY), CAstream, CAstreamLen)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_ECDH_RSA_KEYS
if ((rc = matrixSslLoadEcKeysMem(keys, ECDHRSA256, sizeof(ECDHRSA256),
ECDHRSA256KEY, sizeof(ECDHRSA256KEY), CAstream,
CAstreamLen)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_EC_KEYS
if ((rc = matrixSslLoadEcKeysMem(keys, EC521, sizeof(EC521),
EC521KEY, sizeof(EC521KEY), CAstream, CAstreamLen)) < 0) {
// if ((rc = matrixSslLoadEcKeysMem(keys, EC256, sizeof(EC256),
// EC256KEY, sizeof(EC256KEY), CAstream, CAstreamLen)) < 0) {
// if ((rc = matrixSslLoadEcKeysMem(keys, EC192, sizeof(EC192),
// EC192KEY, sizeof(EC192KEY), CAstream, CAstreamLen)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef REQUIRE_DH_PARAMS
if (matrixSslLoadDhParamsMem(keys, dhParamBuf1024, sizeof(dhParamBuf1024))
< 0){
_psTrace("Unable to load DH parameters\n");
}
#endif /* DH_PARAMS */
psFree(CAstream, NULL);
#else /* USE_HEADER_KEYS */
/*
File based keys
Build the CA list first for potential client auth usage
*/
CAstreamLen = 0;
#ifdef USE_RSA
CAstreamLen += (int32)strlen(rsaCAFile) + 1;
#ifdef USE_ECC
CAstreamLen += (int32)strlen(ecdhRsaCAFile) + 1;
#endif
#endif
#ifdef USE_ECC
CAstreamLen += (int32)strlen(ecCAFile) + 1;
#endif
CAstream = psMalloc(NULL, CAstreamLen);
memset(CAstream, 0x0, CAstreamLen);
CAstreamLen = 0;
#ifdef USE_RSA
memcpy(CAstream, rsaCAFile, strlen(rsaCAFile));
CAstreamLen += strlen(rsaCAFile);
#ifdef USE_ECC
memcpy(CAstream + CAstreamLen, ";", 1); CAstreamLen++;
memcpy(CAstream + CAstreamLen, ecdhRsaCAFile, strlen(ecdhRsaCAFile));
CAstreamLen += strlen(ecdhRsaCAFile);
#endif
#endif
#ifdef USE_ECC
if (CAstreamLen > 0) {
memcpy(CAstream + CAstreamLen, ";", 1); CAstreamLen++;
}
memcpy(CAstream + CAstreamLen, ecCAFile, strlen(ecCAFile));
#endif
/* Load Identiy */
#ifdef EXAMPLE_RSA_KEYS
if ((rc = matrixSslLoadRsaKeys(keys, rsaCertFile, rsaPrivkeyFile, NULL,
(char*)CAstream)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_ECDH_RSA_KEYS
if ((rc = matrixSslLoadEcKeys(keys, ecdhRsaCertFile, ecdhRsaPrivkeyFile,
NULL, (char*)CAstream)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef EXAMPLE_EC_KEYS
if ((rc = matrixSslLoadEcKeys(keys, ecCertFile, ecPrivkeyFile, NULL,
(char*)CAstream)) < 0) {
_psTrace("No certificate material loaded. Exiting\n");
psFree(CAstream, NULL);
matrixSslDeleteKeys(keys);
matrixSslClose();
return rc;
}
#endif
#ifdef REQUIRE_DH_PARAMS
if (matrixSslLoadDhParams(keys, dhParamFile) < 0){
_psTrace("Unable to load DH parameters\n");
}
#endif
psFree(CAstream, NULL);
#endif /* USE_HEADER_KEYS */
#ifdef USE_PSK_CIPHER_SUITE
/* The first one supports the 15-byte openssl PSK ID */
matrixSslLoadPsk(keys, pskTable[0].key, sizeof(pskTable[0].key),
pskTable[rc].id, 15);
for (rc = 0; rc < 8; rc++) {
matrixSslLoadPsk(keys, pskTable[rc].key, sizeof(pskTable[rc].key),
pskTable[rc].id, sizeof(pskTable[rc].id));
}
#endif /* PSK */
if (argc == 2) {
switch (atoi(argv[1])) {
case 0:
g_proto = SSL_FLAGS_SSLV3;
break;
case 1:
g_proto = SSL_FLAGS_TLS_1_0;
break;
case 2:
g_proto = SSL_FLAGS_TLS_1_1;
break;
case 3:
g_proto = SSL_FLAGS_TLS_1_2;
break;
default:
g_proto = SSL_FLAGS_TLS_1_0;
break;
}
} else {
g_proto = 0;
}
/* Create the listening socket that will accept incoming connections */
if ((lfd = socketListen(HTTPS_PORT, &err)) == INVALID_SOCKET) {
_psTraceInt("Can't listen on port %d\n", HTTPS_PORT);
goto L_EXIT;
}
/* Main select loop to handle sockets events */
while (!g_exitFlag) {
selectLoop(keys, lfd);
}
L_EXIT:
if (lfd != INVALID_SOCKET) close(lfd);
if (keys) matrixSslDeleteKeys(keys);
matrixSslClose();
return 0;
}