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wolfssl/src/wolfio.c
Juliusz Sosinowicz 651a7a97b9 Add secure renegotiation to DTLS 1.2 
- Hash of fragmented certificate was not calculated as a single message and instead we were hashing individual fragments which produced the wrong digest, shared secret, etc...
- Reset handshake number after server Finished packet is sent or received (depending on side)
- Reserve space in buffer for cipher stuff
- Take `DTLS_RECORD_EXTRA` and  `DTLS_HANDSHAKE_EXTRA` into size and offset calculations for DTLS path
- Fix renegotiation in DTLS with AES128-SHA
- Fix renegotiation in DTLS with AES-GCM
- Support HelloVerify request during secure renegotiation
- Save renegotiation handshake messages for retransmission in timeout
- Handle cipher parameters from different epochs. DTLS may need to resend and receive messages from previous epochs so handling different sets of encryption and decryption parameters is crucial.
2020-06-12 11:36:43 +02:00

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/* wolfio.c
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#ifndef WOLFCRYPT_ONLY
#ifdef _WIN32_WCE
/* On WinCE winsock2.h must be included before windows.h for socket stuff */
#include <winsock2.h>
#endif
#include <wolfssl/internal.h>
#include <wolfssl/error-ssl.h>
#include <wolfssl/wolfio.h>
#if defined(HAVE_HTTP_CLIENT)
#include <stdlib.h> /* strtol() */
#endif
/*
Possible IO enable options:
* WOLFSSL_USER_IO: Disables default Embed* callbacks and default: off
allows user to define their own using
wolfSSL_CTX_SetIORecv and wolfSSL_CTX_SetIOSend
* USE_WOLFSSL_IO: Enables the wolfSSL IO functions default: off
* HAVE_HTTP_CLIENT: Enables HTTP client API's default: off
(unless HAVE_OCSP or HAVE_CRL_IO defined)
* HAVE_IO_TIMEOUT: Enables support for connect timeout default: off
*/
/* if user writes own I/O callbacks they can define WOLFSSL_USER_IO to remove
automatic setting of default I/O functions EmbedSend() and EmbedReceive()
but they'll still need SetCallback xxx() at end of file
*/
#if defined(USE_WOLFSSL_IO) || defined(HAVE_HTTP_CLIENT)
/* Translates return codes returned from
* send() and recv() if need be.
*/
static WC_INLINE int TranslateReturnCode(int old, int sd)
{
(void)sd;
#if defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX)
if (old == 0) {
errno = SOCKET_EWOULDBLOCK;
return -1; /* convert to BSD style wouldblock as error */
}
if (old < 0) {
errno = RTCS_geterror(sd);
if (errno == RTCSERR_TCP_CONN_CLOSING)
return 0; /* convert to BSD style closing */
if (errno == RTCSERR_TCP_CONN_RLSD)
errno = SOCKET_ECONNRESET;
if (errno == RTCSERR_TCP_TIMED_OUT)
errno = SOCKET_EAGAIN;
}
#endif
return old;
}
static WC_INLINE int wolfSSL_LastError(void)
{
#ifdef USE_WINDOWS_API
return WSAGetLastError();
#elif defined(EBSNET)
return xn_getlasterror();
#else
return errno;
#endif
}
#endif /* USE_WOLFSSL_IO || HAVE_HTTP_CLIENT */
#ifdef OPENSSL_EXTRA
/* Use the WOLFSSL read BIO for receiving data. This is set by the function
* wolfSSL_set_bio and can also be set by wolfSSL_CTX_SetIORecv.
*
* ssl WOLFSSL struct passed in that has this function set as the receive
* callback.
* buf buffer to fill with data read
* sz size of buf buffer
* ctx a user set context
*
* returns the amount of data read or want read. See WOLFSSL_CBIO_ERR_* values.
*/
int BioReceive(WOLFSSL* ssl, char* buf, int sz, void* ctx)
{
int recvd = WOLFSSL_CBIO_ERR_GENERAL;
WOLFSSL_ENTER("BioReceive");
if (ssl->biord == NULL) {
WOLFSSL_MSG("WOLFSSL biord not set");
return WOLFSSL_CBIO_ERR_GENERAL;
}
if (ssl->biord->method && ssl->biord->method->readCb) {
WOLFSSL_MSG("Calling custom biord");
recvd = ssl->biord->method->readCb(ssl->biord, buf, sz);
if (recvd < 0 && recvd != WOLFSSL_CBIO_ERR_WANT_READ)
return WOLFSSL_CBIO_ERR_GENERAL;
return recvd;
}
switch (ssl->biord->type) {
case WOLFSSL_BIO_MEMORY:
case WOLFSSL_BIO_BIO:
if (wolfSSL_BIO_ctrl_pending(ssl->biord) == 0) {
WOLFSSL_MSG("BIO want read");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
recvd = wolfSSL_BIO_read(ssl->biord, buf, sz);
if (recvd <= 0) {
WOLFSSL_MSG("BIO general error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
break;
default:
WOLFSSL_MSG("This BIO type is unknown / unsupported");
return WOLFSSL_CBIO_ERR_GENERAL;
}
(void)ctx;
return recvd;
}
/* Use the WOLFSSL write BIO for sending data. This is set by the function
* wolfSSL_set_bio and can also be set by wolfSSL_CTX_SetIOSend.
*
* ssl WOLFSSL struct passed in that has this function set as the send callback.
* buf buffer with data to write out
* sz size of buf buffer
* ctx a user set context
*
* returns the amount of data sent or want send. See WOLFSSL_CBIO_ERR_* values.
*/
int BioSend(WOLFSSL* ssl, char *buf, int sz, void *ctx)
{
int sent = WOLFSSL_CBIO_ERR_GENERAL;
WOLFSSL_ENTER("BioSend");
if (ssl->biowr == NULL) {
WOLFSSL_MSG("WOLFSSL biowr not set");
return WOLFSSL_CBIO_ERR_GENERAL;
}
if (ssl->biowr->method && ssl->biowr->method->writeCb) {
WOLFSSL_MSG("Calling custom biowr");
sent = ssl->biowr->method->writeCb(ssl->biowr, buf, sz);
if (sent < 0) {
return WOLFSSL_CBIO_ERR_GENERAL;
}
return sent;
}
switch (ssl->biowr->type) {
case WOLFSSL_BIO_MEMORY:
case WOLFSSL_BIO_BIO:
sent = wolfSSL_BIO_write(ssl->biowr, buf, sz);
if (sent < 0) {
return WOLFSSL_CBIO_ERR_GENERAL;
}
break;
default:
WOLFSSL_MSG("This BIO type is unknown / unsupported");
return WOLFSSL_CBIO_ERR_GENERAL;
}
(void)ctx;
return sent;
}
#endif
#ifdef USE_WOLFSSL_IO
/* The receive embedded callback
* return : nb bytes read, or error
*/
int EmbedReceive(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
int sd = *(int*)ctx;
int recvd;
recvd = wolfIO_Recv(sd, buf, sz, ssl->rflags);
if (recvd < 0) {
int err = wolfSSL_LastError();
WOLFSSL_MSG("Embed Receive error");
if (err == SOCKET_EWOULDBLOCK || err == SOCKET_EAGAIN) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else if (err == SOCKET_ECONNRESET) {
WOLFSSL_MSG("\tConnection reset");
return WOLFSSL_CBIO_ERR_CONN_RST;
}
else if (err == SOCKET_EINTR) {
WOLFSSL_MSG("\tSocket interrupted");
return WOLFSSL_CBIO_ERR_ISR;
}
else if (err == SOCKET_ECONNABORTED) {
WOLFSSL_MSG("\tConnection aborted");
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
}
else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
else if (recvd == 0) {
WOLFSSL_MSG("Embed receive connection closed");
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
}
return recvd;
}
/* The send embedded callback
* return : nb bytes sent, or error
*/
int EmbedSend(WOLFSSL* ssl, char *buf, int sz, void *ctx)
{
int sd = *(int*)ctx;
int sent;
#ifdef WOLFSSL_MAX_SEND_SZ
if (sz > WOLFSSL_MAX_SEND_SZ)
sz = WOLFSSL_MAX_SEND_SZ;
#endif
sent = wolfIO_Send(sd, buf, sz, ssl->wflags);
if (sent < 0) {
int err = wolfSSL_LastError();
WOLFSSL_MSG("Embed Send error");
if (err == SOCKET_EWOULDBLOCK || err == SOCKET_EAGAIN) {
WOLFSSL_MSG("\tWould Block");
return WOLFSSL_CBIO_ERR_WANT_WRITE;
}
else if (err == SOCKET_ECONNRESET) {
WOLFSSL_MSG("\tConnection reset");
return WOLFSSL_CBIO_ERR_CONN_RST;
}
else if (err == SOCKET_EINTR) {
WOLFSSL_MSG("\tSocket interrupted");
return WOLFSSL_CBIO_ERR_ISR;
}
else if (err == SOCKET_EPIPE) {
WOLFSSL_MSG("\tSocket EPIPE");
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
}
else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
return sent;
}
#ifdef WOLFSSL_DTLS
#include <wolfssl/wolfcrypt/sha.h>
#define SENDTO_FUNCTION sendto
#define RECVFROM_FUNCTION recvfrom
/* The receive embedded callback
* return : nb bytes read, or error
*/
int EmbedReceiveFrom(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
WOLFSSL_DTLS_CTX* dtlsCtx = (WOLFSSL_DTLS_CTX*)ctx;
int recvd;
int err;
int sd = dtlsCtx->rfd;
int dtls_timeout = wolfSSL_dtls_get_current_timeout(ssl);
SOCKADDR_S peer;
XSOCKLENT peerSz = sizeof(peer);
WOLFSSL_ENTER("EmbedReceiveFrom()");
/* Don't use ssl->options.handShakeDone since it is true even if
* we are in the process of renegotiation */
if (ssl->options.handShakeState == HANDSHAKE_DONE)
dtls_timeout = 0;
if (!wolfSSL_get_using_nonblock(ssl)) {
#ifdef USE_WINDOWS_API
DWORD timeout = dtls_timeout * 1000;
#else
struct timeval timeout;
XMEMSET(&timeout, 0, sizeof(timeout));
timeout.tv_sec = dtls_timeout;
#endif
if (setsockopt(sd, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeout,
sizeof(timeout)) != 0) {
WOLFSSL_MSG("setsockopt rcvtimeo failed");
}
}
recvd = (int)RECVFROM_FUNCTION(sd, buf, sz, ssl->rflags,
(SOCKADDR*)&peer, &peerSz);
recvd = TranslateReturnCode(recvd, sd);
if (recvd < 0) {
err = wolfSSL_LastError();
WOLFSSL_MSG("Embed Receive From error");
if (err == SOCKET_EWOULDBLOCK || err == SOCKET_EAGAIN) {
if (wolfSSL_dtls_get_using_nonblock(ssl)) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else {
WOLFSSL_MSG("\tSocket timeout");
return WOLFSSL_CBIO_ERR_TIMEOUT;
}
}
else if (err == SOCKET_ECONNRESET) {
WOLFSSL_MSG("\tConnection reset");
return WOLFSSL_CBIO_ERR_CONN_RST;
}
else if (err == SOCKET_EINTR) {
WOLFSSL_MSG("\tSocket interrupted");
return WOLFSSL_CBIO_ERR_ISR;
}
else if (err == SOCKET_ECONNREFUSED) {
WOLFSSL_MSG("\tConnection refused");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
else {
if (dtlsCtx->peer.sz > 0
&& peerSz != (XSOCKLENT)dtlsCtx->peer.sz
&& XMEMCMP(&peer, dtlsCtx->peer.sa, peerSz) != 0) {
WOLFSSL_MSG(" Ignored packet from invalid peer");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
}
return recvd;
}
/* The send embedded callback
* return : nb bytes sent, or error
*/
int EmbedSendTo(WOLFSSL* ssl, char *buf, int sz, void *ctx)
{
WOLFSSL_DTLS_CTX* dtlsCtx = (WOLFSSL_DTLS_CTX*)ctx;
int sd = dtlsCtx->wfd;
int sent;
int err;
WOLFSSL_ENTER("EmbedSendTo()");
sent = (int)SENDTO_FUNCTION(sd, buf, sz, ssl->wflags,
(const SOCKADDR*)dtlsCtx->peer.sa,
dtlsCtx->peer.sz);
sent = TranslateReturnCode(sent, sd);
if (sent < 0) {
err = wolfSSL_LastError();
WOLFSSL_MSG("Embed Send To error");
if (err == SOCKET_EWOULDBLOCK || err == SOCKET_EAGAIN) {
WOLFSSL_MSG("\tWould Block");
return WOLFSSL_CBIO_ERR_WANT_WRITE;
}
else if (err == SOCKET_ECONNRESET) {
WOLFSSL_MSG("\tConnection reset");
return WOLFSSL_CBIO_ERR_CONN_RST;
}
else if (err == SOCKET_EINTR) {
WOLFSSL_MSG("\tSocket interrupted");
return WOLFSSL_CBIO_ERR_ISR;
}
else if (err == SOCKET_EPIPE) {
WOLFSSL_MSG("\tSocket EPIPE");
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
}
else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
return sent;
}
#ifdef WOLFSSL_MULTICAST
/* The alternate receive embedded callback for Multicast
* return : nb bytes read, or error
*/
int EmbedReceiveFromMcast(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
WOLFSSL_DTLS_CTX* dtlsCtx = (WOLFSSL_DTLS_CTX*)ctx;
int recvd;
int err;
int sd = dtlsCtx->rfd;
WOLFSSL_ENTER("EmbedReceiveFromMcast()");
recvd = (int)RECVFROM_FUNCTION(sd, buf, sz, ssl->rflags, NULL, NULL);
recvd = TranslateReturnCode(recvd, sd);
if (recvd < 0) {
err = wolfSSL_LastError();
WOLFSSL_MSG("Embed Receive From error");
if (err == SOCKET_EWOULDBLOCK || err == SOCKET_EAGAIN) {
if (wolfSSL_dtls_get_using_nonblock(ssl)) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else {
WOLFSSL_MSG("\tSocket timeout");
return WOLFSSL_CBIO_ERR_TIMEOUT;
}
}
else if (err == SOCKET_ECONNRESET) {
WOLFSSL_MSG("\tConnection reset");
return WOLFSSL_CBIO_ERR_CONN_RST;
}
else if (err == SOCKET_EINTR) {
WOLFSSL_MSG("\tSocket interrupted");
return WOLFSSL_CBIO_ERR_ISR;
}
else if (err == SOCKET_ECONNREFUSED) {
WOLFSSL_MSG("\tConnection refused");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
return recvd;
}
#endif /* WOLFSSL_MULTICAST */
/* The DTLS Generate Cookie callback
* return : number of bytes copied into buf, or error
*/
int EmbedGenerateCookie(WOLFSSL* ssl, byte *buf, int sz, void *ctx)
{
int sd = ssl->wfd;
SOCKADDR_S peer;
XSOCKLENT peerSz = sizeof(peer);
byte digest[WC_SHA256_DIGEST_SIZE];
int ret = 0;
(void)ctx;
XMEMSET(&peer, 0, sizeof(peer));
if (getpeername(sd, (SOCKADDR*)&peer, &peerSz) != 0) {
WOLFSSL_MSG("getpeername failed in EmbedGenerateCookie");
return GEN_COOKIE_E;
}
ret = wc_Sha256Hash((byte*)&peer, peerSz, digest);
if (ret != 0)
return ret;
if (sz > WC_SHA256_DIGEST_SIZE)
sz = WC_SHA256_DIGEST_SIZE;
XMEMCPY(buf, digest, sz);
return sz;
}
#ifdef WOLFSSL_SESSION_EXPORT
/* get the peer information in human readable form (ip, port, family)
* default function assumes BSD sockets
* can be overridden with wolfSSL_CTX_SetIOGetPeer
*/
int EmbedGetPeer(WOLFSSL* ssl, char* ip, int* ipSz,
unsigned short* port, int* fam)
{
SOCKADDR_S peer;
word32 peerSz;
int ret;
if (ssl == NULL || ip == NULL || ipSz == NULL ||
port == NULL || fam == NULL) {
return BAD_FUNC_ARG;
}
/* get peer information stored in ssl struct */
peerSz = sizeof(SOCKADDR_S);
if ((ret = wolfSSL_dtls_get_peer(ssl, (void*)&peer, &peerSz))
!= WOLFSSL_SUCCESS) {
return ret;
}
/* extract family, ip, and port */
*fam = ((SOCKADDR_S*)&peer)->ss_family;
switch (*fam) {
case WOLFSSL_IP4:
if (XINET_NTOP(*fam, &(((SOCKADDR_IN*)&peer)->sin_addr),
ip, *ipSz) == NULL) {
WOLFSSL_MSG("XINET_NTOP error");
return SOCKET_ERROR_E;
}
*port = XNTOHS(((SOCKADDR_IN*)&peer)->sin_port);
break;
case WOLFSSL_IP6:
#ifdef WOLFSSL_IPV6
if (XINET_NTOP(*fam, &(((SOCKADDR_IN6*)&peer)->sin6_addr),
ip, *ipSz) == NULL) {
WOLFSSL_MSG("XINET_NTOP error");
return SOCKET_ERROR_E;
}
*port = XNTOHS(((SOCKADDR_IN6*)&peer)->sin6_port);
#endif /* WOLFSSL_IPV6 */
break;
default:
WOLFSSL_MSG("Unknown family type");
return SOCKET_ERROR_E;
}
ip[*ipSz - 1] = '\0'; /* make sure has terminator */
*ipSz = (word16)XSTRLEN(ip);
return WOLFSSL_SUCCESS;
}
/* set the peer information in human readable form (ip, port, family)
* default function assumes BSD sockets
* can be overridden with wolfSSL_CTX_SetIOSetPeer
*/
int EmbedSetPeer(WOLFSSL* ssl, char* ip, int ipSz,
unsigned short port, int fam)
{
int ret;
SOCKADDR_S addr;
/* sanity checks on arguments */
if (ssl == NULL || ip == NULL || ipSz < 0 || ipSz > DTLS_EXPORT_IP) {
return BAD_FUNC_ARG;
}
addr.ss_family = fam;
switch (addr.ss_family) {
case WOLFSSL_IP4:
if (XINET_PTON(addr.ss_family, ip,
&(((SOCKADDR_IN*)&addr)->sin_addr)) <= 0) {
WOLFSSL_MSG("XINET_PTON error");
return SOCKET_ERROR_E;
}
((SOCKADDR_IN*)&addr)->sin_port = XHTONS(port);
/* peer sa is free'd in SSL_ResourceFree */
if ((ret = wolfSSL_dtls_set_peer(ssl, (SOCKADDR_IN*)&addr,
sizeof(SOCKADDR_IN)))!= WOLFSSL_SUCCESS) {
WOLFSSL_MSG("Import DTLS peer info error");
return ret;
}
break;
case WOLFSSL_IP6:
#ifdef WOLFSSL_IPV6
if (XINET_PTON(addr.ss_family, ip,
&(((SOCKADDR_IN6*)&addr)->sin6_addr)) <= 0) {
WOLFSSL_MSG("XINET_PTON error");
return SOCKET_ERROR_E;
}
((SOCKADDR_IN6*)&addr)->sin6_port = XHTONS(port);
/* peer sa is free'd in SSL_ResourceFree */
if ((ret = wolfSSL_dtls_set_peer(ssl, (SOCKADDR_IN6*)&addr,
sizeof(SOCKADDR_IN6)))!= WOLFSSL_SUCCESS) {
WOLFSSL_MSG("Import DTLS peer info error");
return ret;
}
#endif /* WOLFSSL_IPV6 */
break;
default:
WOLFSSL_MSG("Unknown address family");
return BUFFER_E;
}
return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_SESSION_EXPORT */
#endif /* WOLFSSL_DTLS */
int wolfIO_Recv(SOCKET_T sd, char *buf, int sz, int rdFlags)
{
int recvd;
recvd = (int)RECV_FUNCTION(sd, buf, sz, rdFlags);
recvd = TranslateReturnCode(recvd, sd);
return recvd;
}
int wolfIO_Send(SOCKET_T sd, char *buf, int sz, int wrFlags)
{
int sent;
sent = (int)SEND_FUNCTION(sd, buf, sz, wrFlags);
sent = TranslateReturnCode(sent, sd);
return sent;
}
#endif /* USE_WOLFSSL_IO */
#ifdef HAVE_HTTP_CLIENT
#ifndef HAVE_IO_TIMEOUT
#define io_timeout_sec 0
#else
#ifndef DEFAULT_TIMEOUT_SEC
#define DEFAULT_TIMEOUT_SEC 0 /* no timeout */
#endif
static int io_timeout_sec = DEFAULT_TIMEOUT_SEC;
void wolfIO_SetTimeout(int to_sec)
{
io_timeout_sec = to_sec;
}
int wolfIO_SetBlockingMode(SOCKET_T sockfd, int non_blocking)
{
int ret = 0;
#ifdef USE_WINDOWS_API
unsigned long blocking = non_blocking;
ret = ioctlsocket(sockfd, FIONBIO, &blocking);
if (ret == SOCKET_ERROR)
ret = -1;
#else
ret = fcntl(sockfd, F_GETFL, 0);
if (ret >= 0) {
if (non_blocking)
ret |= O_NONBLOCK;
else
ret &= ~O_NONBLOCK;
ret = fcntl(sockfd, F_SETFL, ret);
}
#endif
if (ret < 0) {
WOLFSSL_MSG("wolfIO_SetBlockingMode failed");
}
return ret;
}
int wolfIO_Select(SOCKET_T sockfd, int to_sec)
{
fd_set rfds, wfds;
int nfds = 0;
struct timeval timeout = { (to_sec > 0) ? to_sec : 0, 0};
int ret;
#ifndef USE_WINDOWS_API
nfds = (int)sockfd + 1;
#endif
FD_ZERO(&rfds);
FD_SET(sockfd, &rfds);
wfds = rfds;
ret = select(nfds, &rfds, &wfds, NULL, &timeout);
if (ret == 0) {
#ifdef DEBUG_HTTP
printf("Timeout: %d\n", ret);
#endif
return HTTP_TIMEOUT;
}
else if (ret > 0) {
if (FD_ISSET(sockfd, &wfds)) {
if (!FD_ISSET(sockfd, &rfds)) {
return 0;
}
}
}
return SOCKET_ERROR_E;
}
#endif /* HAVE_IO_TIMEOUT */
static int wolfIO_Word16ToString(char* d, word16 number)
{
int i = 0;
word16 order = 10000;
word16 digit;
if (d == NULL)
return i;
if (number == 0)
d[i++] = '0';
else {
while (order) {
digit = number / order;
if (i > 0 || digit != 0)
d[i++] = (char)digit + '0';
if (digit != 0)
number %= digit * order;
order = (order > 1) ? order / 10 : 0;
}
}
d[i] = 0; /* null terminate */
return i;
}
int wolfIO_TcpConnect(SOCKET_T* sockfd, const char* ip, word16 port, int to_sec)
{
#ifdef HAVE_SOCKADDR
int ret = 0;
SOCKADDR_S addr;
int sockaddr_len = sizeof(SOCKADDR_IN);
/* use gethostbyname for c99 */
#if defined(HAVE_GETADDRINFO) && !defined(WOLF_C99)
ADDRINFO hints;
ADDRINFO* answer = NULL;
char strPort[6];
#else
HOSTENT* entry;
SOCKADDR_IN *sin;
#endif
if (sockfd == NULL || ip == NULL) {
return -1;
}
XMEMSET(&addr, 0, sizeof(addr));
#ifdef WOLFIO_DEBUG
printf("TCP Connect: %s:%d\n", ip, port);
#endif
/* use gethostbyname for c99 */
#if defined(HAVE_GETADDRINFO) && !defined(WOLF_C99)
XMEMSET(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
if (wolfIO_Word16ToString(strPort, port) == 0) {
WOLFSSL_MSG("invalid port number for responder");
return -1;
}
if (getaddrinfo(ip, strPort, &hints, &answer) < 0 || answer == NULL) {
WOLFSSL_MSG("no addr info for responder");
return -1;
}
sockaddr_len = answer->ai_addrlen;
XMEMCPY(&addr, answer->ai_addr, sockaddr_len);
freeaddrinfo(answer);
#else
entry = gethostbyname(ip);
sin = (SOCKADDR_IN *)&addr;
if (entry) {
sin->sin_family = AF_INET;
sin->sin_port = XHTONS(port);
XMEMCPY(&sin->sin_addr.s_addr, entry->h_addr_list[0], entry->h_length);
}
else {
WOLFSSL_MSG("no addr info for responder");
return -1;
}
#endif
*sockfd = (SOCKET_T)socket(addr.ss_family, SOCK_STREAM, 0);
#ifdef USE_WINDOWS_API
if (*sockfd == SOCKET_INVALID)
#else
if (*sockfd <= SOCKET_INVALID)
#endif
{
WOLFSSL_MSG("bad socket fd, out of fds?");
return -1;
}
#ifdef HAVE_IO_TIMEOUT
/* if timeout value provided then set socket non-blocking */
if (to_sec > 0) {
wolfIO_SetBlockingMode(*sockfd, 1);
}
#else
(void)to_sec;
#endif
ret = connect(*sockfd, (SOCKADDR *)&addr, sockaddr_len);
#ifdef HAVE_IO_TIMEOUT
if (ret != 0) {
if ((errno == EINPROGRESS) && (to_sec > 0)) {
/* wait for connect to complete */
ret = wolfIO_Select(*sockfd, to_sec);
/* restore blocking mode */
wolfIO_SetBlockingMode(*sockfd, 0);
}
}
#endif
if (ret != 0) {
WOLFSSL_MSG("Responder tcp connect failed");
CloseSocket(*sockfd);
*sockfd = SOCKET_INVALID;
return -1;
}
return ret;
#else
(void)sockfd;
(void)ip;
(void)port;
(void)to_sec;
return -1;
#endif /* HAVE_SOCKADDR */
}
#ifndef HTTP_SCRATCH_BUFFER_SIZE
#define HTTP_SCRATCH_BUFFER_SIZE 512
#endif
#ifndef MAX_URL_ITEM_SIZE
#define MAX_URL_ITEM_SIZE 80
#endif
int wolfIO_DecodeUrl(const char* url, int urlSz, char* outName, char* outPath,
word16* outPort)
{
int result = -1;
if (url == NULL || urlSz == 0) {
if (outName)
*outName = 0;
if (outPath)
*outPath = 0;
if (outPort)
*outPort = 0;
}
else {
int i, cur;
/* need to break the url down into scheme, address, and port */
/* "http://example.com:8080/" */
/* "http://[::1]:443/" */
if (XSTRNCMP(url, "http://", 7) == 0) {
cur = 7;
} else cur = 0;
i = 0;
if (url[cur] == '[') {
cur++;
/* copy until ']' */
while (i < MAX_URL_ITEM_SIZE-1 && cur < urlSz && url[cur] != 0 &&
url[cur] != ']') {
if (outName)
outName[i] = url[cur];
i++; cur++;
}
cur++; /* skip ']' */
}
else {
while (i < MAX_URL_ITEM_SIZE-1 && cur < urlSz && url[cur] != 0 &&
url[cur] != ':' && url[cur] != '/') {
if (outName)
outName[i] = url[cur];
i++; cur++;
}
}
if (outName)
outName[i] = 0;
/* Need to pick out the path after the domain name */
if (cur < urlSz && url[cur] == ':') {
char port[6];
int j;
word32 bigPort = 0;
i = 0;
cur++;
while (i < 6 && cur < urlSz && url[cur] != 0 && url[cur] != '/') {
port[i] = url[cur];
i++; cur++;
}
for (j = 0; j < i; j++) {
if (port[j] < '0' || port[j] > '9') return -1;
bigPort = (bigPort * 10) + (port[j] - '0');
}
if (outPort)
*outPort = (word16)bigPort;
}
else if (outPort)
*outPort = 80;
if (cur < urlSz && url[cur] == '/') {
i = 0;
while (i < MAX_URL_ITEM_SIZE-1 && cur < urlSz && url[cur] != 0) {
if (outPath)
outPath[i] = url[cur];
i++; cur++;
}
if (outPath)
outPath[i] = 0;
}
else if (outPath) {
outPath[0] = '/';
outPath[1] = 0;
}
result = 0;
}
return result;
}
static int wolfIO_HttpProcessResponseBuf(int sfd, byte **recvBuf,
int* recvBufSz, int chunkSz, char* start, int len, int dynType, void* heap)
{
byte* newRecvBuf = NULL;
int newRecvSz = *recvBufSz + chunkSz;
int pos = 0;
WOLFSSL_MSG("Processing HTTP response");
#ifdef WOLFIO_DEBUG
printf("HTTP Chunk %d->%d\n", *recvBufSz, chunkSz);
#endif
(void)heap;
(void)dynType;
if (chunkSz < 0 || len < 0) {
WOLFSSL_MSG("wolfIO_HttpProcessResponseBuf invalid chunk or length size");
return MEMORY_E;
}
if (newRecvSz <= 0) {
WOLFSSL_MSG("wolfIO_HttpProcessResponseBuf new receive size overflow");
return MEMORY_E;
}
newRecvBuf = (byte*)XMALLOC(newRecvSz, heap, dynType);
if (newRecvBuf == NULL) {
WOLFSSL_MSG("wolfIO_HttpProcessResponseBuf malloc failed");
return MEMORY_E;
}
/* if buffer already exists, then we are growing it */
if (*recvBuf) {
XMEMCPY(&newRecvBuf[pos], *recvBuf, *recvBufSz);
XFREE(*recvBuf, heap, dynType);
pos += *recvBufSz;
*recvBuf = NULL;
}
/* copy the remainder of the httpBuf into the respBuf */
if (len != 0) {
if (pos + len <= newRecvSz) {
XMEMCPY(&newRecvBuf[pos], start, len);
pos += len;
}
else {
WOLFSSL_MSG("wolfIO_HttpProcessResponseBuf bad size");
XFREE(newRecvBuf, heap, dynType);
return -1;
}
}
/* receive the remainder of chunk */
while (len < chunkSz) {
int rxSz = wolfIO_Recv(sfd, (char*)&newRecvBuf[pos], chunkSz-len, 0);
if (rxSz > 0) {
len += rxSz;
pos += rxSz;
}
else {
WOLFSSL_MSG("wolfIO_HttpProcessResponseBuf recv failed");
XFREE(newRecvBuf, heap, dynType);
return -1;
}
}
*recvBuf = newRecvBuf;
*recvBufSz = newRecvSz;
return 0;
}
int wolfIO_HttpProcessResponse(int sfd, const char** appStrList,
byte** respBuf, byte* httpBuf, int httpBufSz, int dynType, void* heap)
{
int result = 0;
int len = 0;
char *start, *end;
int respBufSz = 0;
int isChunked = 0, chunkSz = 0;
enum phr_state { phr_init, phr_http_start, phr_have_length, phr_have_type,
phr_wait_end, phr_get_chunk_len, phr_get_chunk_data,
phr_http_end
} state = phr_init;
*respBuf = NULL;
start = end = NULL;
do {
if (state == phr_get_chunk_data) {
/* get chunk of data */
result = wolfIO_HttpProcessResponseBuf(sfd, respBuf, &respBufSz,
chunkSz, start, len, dynType, heap);
state = (result != 0) ? phr_http_end : phr_get_chunk_len;
end = NULL;
len = 0;
}
/* read data if no \r\n or first time */
if (end == NULL) {
result = wolfIO_Recv(sfd, (char*)httpBuf+len, httpBufSz-len-1, 0);
if (result > 0) {
len += result;
start = (char*)httpBuf;
start[len] = 0;
}
else {
WOLFSSL_MSG("wolfIO_HttpProcessResponse recv http from peer failed");
return -1;
}
}
end = XSTRSTR(start, "\r\n"); /* locate end */
/* handle incomplete rx */
if (end == NULL) {
if (len != 0)
XMEMMOVE(httpBuf, start, len);
start = end = NULL;
}
/* when start is "\r\n" */
else if (end == start) {
/* if waiting for end or need chunk len */
if (state == phr_wait_end || state == phr_get_chunk_len) {
state = (isChunked) ? phr_get_chunk_len : phr_http_end;
len -= 2; start += 2; /* skip \r\n */
}
else {
WOLFSSL_MSG("wolfIO_HttpProcessResponse header ended early");
return -1;
}
}
else {
*end = 0; /* null terminate */
len -= (int)(end - start) + 2;
/* adjust len to remove the first line including the /r/n */
#ifdef WOLFIO_DEBUG
printf("HTTP Resp: %s\n", start);
#endif
switch (state) {
case phr_init:
if (XSTRLEN(start) < 15) { /* 15 is the length of the two
constant strings we're about to
compare against. */
WOLFSSL_MSG("wolfIO_HttpProcessResponse HTTP header too short.");
return -1;
}
if (XSTRNCASECMP(start, "HTTP/1", 6) == 0) {
start += 9;
if (XSTRNCASECMP(start, "200 OK", 6) != 0) {
WOLFSSL_MSG("wolfIO_HttpProcessResponse not OK");
return -1;
}
state = phr_http_start;
}
break;
case phr_http_start:
case phr_have_length:
case phr_have_type:
if (XSTRLEN(start) < 13) { /* 13 is the shortest of the following
next lines we're checking for. */
WOLFSSL_MSG("wolfIO_HttpProcessResponse content type is too short.");
return -1;
}
if (XSTRNCASECMP(start, "Content-Type:", 13) == 0) {
int i;
start += 13;
while (*start == ' ') start++;
/* try and match against appStrList */
i = 0;
while (appStrList[i] != NULL) {
if (XSTRNCASECMP(start, appStrList[i],
XSTRLEN(appStrList[i])) == 0) {
break;
}
i++;
}
if (appStrList[i] == NULL) {
WOLFSSL_MSG("wolfIO_HttpProcessResponse appstr mismatch");
return -1;
}
state = (state == phr_http_start) ? phr_have_type : phr_wait_end;
}
else if (XSTRNCASECMP(start, "Content-Length:", 15) == 0) {
start += 15;
while (*start == ' ') start++;
chunkSz = XATOI(start);
state = (state == phr_http_start) ? phr_have_length : phr_wait_end;
}
else if (XSTRNCASECMP(start, "Transfer-Encoding:", 18) == 0) {
start += 18;
while (*start == ' ') start++;
if (XSTRNCASECMP(start, "chunked", 7) == 0) {
isChunked = 1;
state = (state == phr_http_start) ? phr_have_length : phr_wait_end;
}
}
break;
case phr_get_chunk_len:
chunkSz = (int)strtol(start, NULL, 16); /* hex format */
state = (chunkSz == 0) ? phr_http_end : phr_get_chunk_data;
break;
case phr_get_chunk_data:
/* processing for chunk data done above, since \r\n isn't required */
case phr_wait_end:
case phr_http_end:
/* do nothing */
break;
} /* switch (state) */
/* skip to end plus \r\n */
start = end + 2;
}
} while (state != phr_http_end);
if (!isChunked) {
result = wolfIO_HttpProcessResponseBuf(sfd, respBuf, &respBufSz, chunkSz,
start, len, dynType, heap);
}
if (result >= 0) {
result = respBufSz;
}
else {
WOLFSSL_ERROR(result);
}
return result;
}
int wolfIO_HttpBuildRequest(const char *reqType, const char *domainName,
const char *path, int pathLen, int reqSz, const char *contentType,
byte *buf, int bufSize)
{
return wolfIO_HttpBuildRequest_ex(reqType, domainName, path, pathLen, reqSz, contentType, "", buf, bufSize);
}
int wolfIO_HttpBuildRequest_ex(const char *reqType, const char *domainName,
const char *path, int pathLen, int reqSz, const char *contentType,
const char *exHdrs, byte *buf, int bufSize)
{
word32 reqTypeLen, domainNameLen, reqSzStrLen, contentTypeLen, exHdrsLen, maxLen;
char reqSzStr[6];
char* req = (char*)buf;
const char* blankStr = " ";
const char* http11Str = " HTTP/1.1";
const char* hostStr = "\r\nHost: ";
const char* contentLenStr = "\r\nContent-Length: ";
const char* contentTypeStr = "\r\nContent-Type: ";
const char* singleCrLfStr = "\r\n";
const char* doubleCrLfStr = "\r\n\r\n";
word32 blankStrLen, http11StrLen, hostStrLen, contentLenStrLen,
contentTypeStrLen, singleCrLfStrLen, doubleCrLfStrLen;
reqTypeLen = (word32)XSTRLEN(reqType);
domainNameLen = (word32)XSTRLEN(domainName);
reqSzStrLen = wolfIO_Word16ToString(reqSzStr, (word16)reqSz);
contentTypeLen = (word32)XSTRLEN(contentType);
blankStrLen = (word32)XSTRLEN(blankStr);
http11StrLen = (word32)XSTRLEN(http11Str);
hostStrLen = (word32)XSTRLEN(hostStr);
contentLenStrLen = (word32)XSTRLEN(contentLenStr);
contentTypeStrLen = (word32)XSTRLEN(contentTypeStr);
if(exHdrs){
singleCrLfStrLen = (word32)XSTRLEN(singleCrLfStr);
exHdrsLen = (word32)XSTRLEN(exHdrs);
} else {
singleCrLfStrLen = 0;
exHdrsLen = 0;
}
doubleCrLfStrLen = (word32)XSTRLEN(doubleCrLfStr);
/* determine max length and check it */
maxLen =
reqTypeLen +
blankStrLen +
pathLen +
http11StrLen +
hostStrLen +
domainNameLen +
contentLenStrLen +
reqSzStrLen +
contentTypeStrLen +
contentTypeLen +
singleCrLfStrLen +
exHdrsLen +
doubleCrLfStrLen +
1 /* null term */;
if (maxLen > (word32)bufSize)
return 0;
XSTRNCPY((char*)buf, reqType, bufSize);
buf += reqTypeLen; bufSize -= reqTypeLen;
XSTRNCPY((char*)buf, blankStr, bufSize);
buf += blankStrLen; bufSize -= blankStrLen;
XSTRNCPY((char*)buf, path, bufSize);
buf += pathLen; bufSize -= pathLen;
XSTRNCPY((char*)buf, http11Str, bufSize);
buf += http11StrLen; bufSize -= http11StrLen;
if (domainNameLen > 0) {
XSTRNCPY((char*)buf, hostStr, bufSize);
buf += hostStrLen; bufSize -= hostStrLen;
XSTRNCPY((char*)buf, domainName, bufSize);
buf += domainNameLen; bufSize -= domainNameLen;
}
if (reqSz > 0 && reqSzStrLen > 0) {
XSTRNCPY((char*)buf, contentLenStr, bufSize);
buf += contentLenStrLen; bufSize -= contentLenStrLen;
XSTRNCPY((char*)buf, reqSzStr, bufSize);
buf += reqSzStrLen; bufSize -= reqSzStrLen;
}
if (contentTypeLen > 0) {
XSTRNCPY((char*)buf, contentTypeStr, bufSize);
buf += contentTypeStrLen; bufSize -= contentTypeStrLen;
XSTRNCPY((char*)buf, contentType, bufSize);
buf += contentTypeLen; bufSize -= contentTypeLen;
}
if (exHdrsLen > 0)
{
XSTRNCPY((char *)buf, singleCrLfStr, bufSize);
buf += singleCrLfStrLen;
bufSize -= singleCrLfStrLen;
XSTRNCPY((char *)buf, exHdrs, bufSize);
buf += exHdrsLen;
bufSize -= exHdrsLen;
}
XSTRNCPY((char*)buf, doubleCrLfStr, bufSize);
buf += doubleCrLfStrLen;
#ifdef WOLFIO_DEBUG
printf("HTTP %s: %s", reqType, req);
#endif
/* calculate actual length based on original and new pointer */
return (int)((char*)buf - req);
}
#ifdef HAVE_OCSP
int wolfIO_HttpBuildRequestOcsp(const char* domainName, const char* path,
int ocspReqSz, byte* buf, int bufSize)
{
const char *cacheCtl = "Cache-Control: no-cache";
return wolfIO_HttpBuildRequest_ex("POST", domainName, path, (int)XSTRLEN(path),
ocspReqSz, "application/ocsp-request", cacheCtl, buf, bufSize);
}
/* return: >0 OCSP Response Size
* -1 error */
int wolfIO_HttpProcessResponseOcsp(int sfd, byte** respBuf,
byte* httpBuf, int httpBufSz, void* heap)
{
const char* appStrList[] = {
"application/ocsp-response",
NULL
};
return wolfIO_HttpProcessResponse(sfd, appStrList,
respBuf, httpBuf, httpBufSz, DYNAMIC_TYPE_OCSP, heap);
}
/* in default wolfSSL callback ctx is the heap pointer */
int EmbedOcspLookup(void* ctx, const char* url, int urlSz,
byte* ocspReqBuf, int ocspReqSz, byte** ocspRespBuf)
{
SOCKET_T sfd = SOCKET_INVALID;
word16 port;
int ret = -1;
#ifdef WOLFSSL_SMALL_STACK
char* path;
char* domainName;
#else
char path[MAX_URL_ITEM_SIZE];
char domainName[MAX_URL_ITEM_SIZE];
#endif
#ifdef WOLFSSL_SMALL_STACK
path = (char*)XMALLOC(MAX_URL_ITEM_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (path == NULL)
return MEMORY_E;
domainName = (char*)XMALLOC(MAX_URL_ITEM_SIZE, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (domainName == NULL) {
XFREE(path, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
if (ocspReqBuf == NULL || ocspReqSz == 0) {
WOLFSSL_MSG("OCSP request is required for lookup");
}
else if (ocspRespBuf == NULL) {
WOLFSSL_MSG("Cannot save OCSP response");
}
else if (wolfIO_DecodeUrl(url, urlSz, domainName, path, &port) < 0) {
WOLFSSL_MSG("Unable to decode OCSP URL");
}
else {
/* Note, the library uses the EmbedOcspRespFree() callback to
* free this buffer. */
int httpBufSz = HTTP_SCRATCH_BUFFER_SIZE;
byte* httpBuf = (byte*)XMALLOC(httpBufSz, ctx, DYNAMIC_TYPE_OCSP);
if (httpBuf == NULL) {
WOLFSSL_MSG("Unable to create OCSP response buffer");
}
else {
httpBufSz = wolfIO_HttpBuildRequestOcsp(domainName, path, ocspReqSz,
httpBuf, httpBufSz);
ret = wolfIO_TcpConnect(&sfd, domainName, port, io_timeout_sec);
if (ret != 0) {
WOLFSSL_MSG("OCSP Responder connection failed");
}
else if (wolfIO_Send(sfd, (char*)httpBuf, httpBufSz, 0) !=
httpBufSz) {
WOLFSSL_MSG("OCSP http request failed");
}
else if (wolfIO_Send(sfd, (char*)ocspReqBuf, ocspReqSz, 0) !=
ocspReqSz) {
WOLFSSL_MSG("OCSP ocsp request failed");
}
else {
ret = wolfIO_HttpProcessResponseOcsp(sfd, ocspRespBuf, httpBuf,
HTTP_SCRATCH_BUFFER_SIZE, ctx);
}
if (sfd != SOCKET_INVALID)
CloseSocket(sfd);
XFREE(httpBuf, ctx, DYNAMIC_TYPE_OCSP);
}
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(path, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(domainName, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
/* in default callback ctx is heap hint */
void EmbedOcspRespFree(void* ctx, byte *resp)
{
if (resp)
XFREE(resp, ctx, DYNAMIC_TYPE_OCSP);
(void)ctx;
}
#endif /* HAVE_OCSP */
#if defined(HAVE_CRL) && defined(HAVE_CRL_IO)
int wolfIO_HttpBuildRequestCrl(const char* url, int urlSz,
const char* domainName, byte* buf, int bufSize)
{
const char *cacheCtl = "Cache-Control: no-cache";
return wolfIO_HttpBuildRequest_ex("GET", domainName, url, urlSz, 0, "",
cacheCtl, buf, bufSize);
}
int wolfIO_HttpProcessResponseCrl(WOLFSSL_CRL* crl, int sfd, byte* httpBuf,
int httpBufSz)
{
int result;
byte *respBuf = NULL;
const char* appStrList[] = {
"application/pkix-crl",
"application/x-pkcs7-crl",
NULL
};
result = wolfIO_HttpProcessResponse(sfd, appStrList,
&respBuf, httpBuf, httpBufSz, DYNAMIC_TYPE_CRL, crl->heap);
if (result >= 0) {
result = BufferLoadCRL(crl, respBuf, result, WOLFSSL_FILETYPE_ASN1, 0);
}
XFREE(respBuf, crl->heap, DYNAMIC_TYPE_CRL);
return result;
}
int EmbedCrlLookup(WOLFSSL_CRL* crl, const char* url, int urlSz)
{
SOCKET_T sfd = SOCKET_INVALID;
word16 port;
int ret = -1;
#ifdef WOLFSSL_SMALL_STACK
char* domainName;
#else
char domainName[MAX_URL_ITEM_SIZE];
#endif
#ifdef WOLFSSL_SMALL_STACK
domainName = (char*)XMALLOC(MAX_URL_ITEM_SIZE, crl->heap,
DYNAMIC_TYPE_TMP_BUFFER);
if (domainName == NULL) {
return MEMORY_E;
}
#endif
if (wolfIO_DecodeUrl(url, urlSz, domainName, NULL, &port) < 0) {
WOLFSSL_MSG("Unable to decode CRL URL");
}
else {
int httpBufSz = HTTP_SCRATCH_BUFFER_SIZE;
byte* httpBuf = (byte*)XMALLOC(httpBufSz, crl->heap,
DYNAMIC_TYPE_CRL);
if (httpBuf == NULL) {
WOLFSSL_MSG("Unable to create CRL response buffer");
}
else {
httpBufSz = wolfIO_HttpBuildRequestCrl(url, urlSz, domainName,
httpBuf, httpBufSz);
ret = wolfIO_TcpConnect(&sfd, domainName, port, io_timeout_sec);
if (ret != 0) {
WOLFSSL_MSG("CRL connection failed");
}
else if (wolfIO_Send(sfd, (char*)httpBuf, httpBufSz, 0)
!= httpBufSz) {
WOLFSSL_MSG("CRL http get failed");
}
else {
ret = wolfIO_HttpProcessResponseCrl(crl, sfd, httpBuf,
HTTP_SCRATCH_BUFFER_SIZE);
}
if (sfd != SOCKET_INVALID)
CloseSocket(sfd);
XFREE(httpBuf, crl->heap, DYNAMIC_TYPE_CRL);
}
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(domainName, crl->heap, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#endif /* HAVE_CRL && HAVE_CRL_IO */
#endif /* HAVE_HTTP_CLIENT */
void wolfSSL_CTX_SetIORecv(WOLFSSL_CTX *ctx, CallbackIORecv CBIORecv)
{
if (ctx) {
ctx->CBIORecv = CBIORecv;
#ifdef OPENSSL_EXTRA
ctx->cbioFlag |= WOLFSSL_CBIO_RECV;
#endif
}
}
void wolfSSL_CTX_SetIOSend(WOLFSSL_CTX *ctx, CallbackIOSend CBIOSend)
{
if (ctx) {
ctx->CBIOSend = CBIOSend;
#ifdef OPENSSL_EXTRA
ctx->cbioFlag |= WOLFSSL_CBIO_SEND;
#endif
}
}
/* sets the IO callback to use for receives at WOLFSSL level */
void wolfSSL_SSLSetIORecv(WOLFSSL *ssl, CallbackIORecv CBIORecv)
{
if (ssl) {
ssl->CBIORecv = CBIORecv;
#ifdef OPENSSL_EXTRA
ssl->cbioFlag |= WOLFSSL_CBIO_RECV;
#endif
}
}
/* sets the IO callback to use for sends at WOLFSSL level */
void wolfSSL_SSLSetIOSend(WOLFSSL *ssl, CallbackIOSend CBIOSend)
{
if (ssl) {
ssl->CBIOSend = CBIOSend;
#ifdef OPENSSL_EXTRA
ssl->cbioFlag |= WOLFSSL_CBIO_SEND;
#endif
}
}
void wolfSSL_SetIOReadCtx(WOLFSSL* ssl, void *rctx)
{
if (ssl)
ssl->IOCB_ReadCtx = rctx;
}
void wolfSSL_SetIOWriteCtx(WOLFSSL* ssl, void *wctx)
{
if (ssl)
ssl->IOCB_WriteCtx = wctx;
}
void* wolfSSL_GetIOReadCtx(WOLFSSL* ssl)
{
if (ssl)
return ssl->IOCB_ReadCtx;
return NULL;
}
void* wolfSSL_GetIOWriteCtx(WOLFSSL* ssl)
{
if (ssl)
return ssl->IOCB_WriteCtx;
return NULL;
}
void wolfSSL_SetIOReadFlags(WOLFSSL* ssl, int flags)
{
if (ssl)
ssl->rflags = flags;
}
void wolfSSL_SetIOWriteFlags(WOLFSSL* ssl, int flags)
{
if (ssl)
ssl->wflags = flags;
}
#ifdef WOLFSSL_DTLS
void wolfSSL_CTX_SetGenCookie(WOLFSSL_CTX* ctx, CallbackGenCookie cb)
{
if (ctx)
ctx->CBIOCookie = cb;
}
void wolfSSL_SetCookieCtx(WOLFSSL* ssl, void *ctx)
{
if (ssl)
ssl->IOCB_CookieCtx = ctx;
}
void* wolfSSL_GetCookieCtx(WOLFSSL* ssl)
{
if (ssl)
return ssl->IOCB_CookieCtx;
return NULL;
}
#ifdef WOLFSSL_SESSION_EXPORT
void wolfSSL_CTX_SetIOGetPeer(WOLFSSL_CTX* ctx, CallbackGetPeer cb)
{
if (ctx)
ctx->CBGetPeer = cb;
}
void wolfSSL_CTX_SetIOSetPeer(WOLFSSL_CTX* ctx, CallbackSetPeer cb)
{
if (ctx)
ctx->CBSetPeer = cb;
}
#endif /* WOLFSSL_SESSION_EXPORT */
#endif /* WOLFSSL_DTLS */
#ifdef HAVE_NETX
/* The NetX receive callback
* return : bytes read, or error
*/
int NetX_Receive(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
NetX_Ctx* nxCtx = (NetX_Ctx*)ctx;
ULONG left;
ULONG total;
ULONG copied = 0;
UINT status;
(void)ssl;
if (nxCtx == NULL || nxCtx->nxSocket == NULL) {
WOLFSSL_MSG("NetX Recv NULL parameters");
return WOLFSSL_CBIO_ERR_GENERAL;
}
if (nxCtx->nxPacket == NULL) {
status = nx_tcp_socket_receive(nxCtx->nxSocket, &nxCtx->nxPacket,
nxCtx->nxWait);
if (status != NX_SUCCESS) {
WOLFSSL_MSG("NetX Recv receive error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
if (nxCtx->nxPacket) {
status = nx_packet_length_get(nxCtx->nxPacket, &total);
if (status != NX_SUCCESS) {
WOLFSSL_MSG("NetX Recv length get error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
left = total - nxCtx->nxOffset;
status = nx_packet_data_extract_offset(nxCtx->nxPacket, nxCtx->nxOffset,
buf, sz, &copied);
if (status != NX_SUCCESS) {
WOLFSSL_MSG("NetX Recv data extract offset error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
nxCtx->nxOffset += copied;
if (copied == left) {
WOLFSSL_MSG("NetX Recv Drained packet");
nx_packet_release(nxCtx->nxPacket);
nxCtx->nxPacket = NULL;
nxCtx->nxOffset = 0;
}
}
return copied;
}
/* The NetX send callback
* return : bytes sent, or error
*/
int NetX_Send(WOLFSSL* ssl, char *buf, int sz, void *ctx)
{
NetX_Ctx* nxCtx = (NetX_Ctx*)ctx;
NX_PACKET* packet;
NX_PACKET_POOL* pool; /* shorthand */
UINT status;
(void)ssl;
if (nxCtx == NULL || nxCtx->nxSocket == NULL) {
WOLFSSL_MSG("NetX Send NULL parameters");
return WOLFSSL_CBIO_ERR_GENERAL;
}
pool = nxCtx->nxSocket->nx_tcp_socket_ip_ptr->nx_ip_default_packet_pool;
status = nx_packet_allocate(pool, &packet, NX_TCP_PACKET,
nxCtx->nxWait);
if (status != NX_SUCCESS) {
WOLFSSL_MSG("NetX Send packet alloc error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
status = nx_packet_data_append(packet, buf, sz, pool, nxCtx->nxWait);
if (status != NX_SUCCESS) {
nx_packet_release(packet);
WOLFSSL_MSG("NetX Send data append error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
status = nx_tcp_socket_send(nxCtx->nxSocket, packet, nxCtx->nxWait);
if (status != NX_SUCCESS) {
nx_packet_release(packet);
WOLFSSL_MSG("NetX Send socket send error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
return sz;
}
/* like set_fd, but for default NetX context */
void wolfSSL_SetIO_NetX(WOLFSSL* ssl, NX_TCP_SOCKET* nxSocket, ULONG waitOption)
{
if (ssl) {
ssl->nxCtx.nxSocket = nxSocket;
ssl->nxCtx.nxWait = waitOption;
}
}
#endif /* HAVE_NETX */
#ifdef MICRIUM
/* Micrium uTCP/IP port, using the NetSock API
* TCP and UDP are currently supported with the callbacks below.
*
* WOLFSSL_SESSION_EXPORT is not yet supported, would need EmbedGetPeer()
* and EmbedSetPeer() callbacks implemented.
*
* HAVE_CRL is not yet supported, would need an EmbedCrlLookup()
* callback implemented.
*
* HAVE_OCSP is not yet supported, would need an EmbedOCSPLookup()
* callback implemented.
*/
/* The Micrium uTCP/IP send callback
* return : bytes sent, or error
*/
int MicriumSend(WOLFSSL* ssl, char* buf, int sz, void* ctx)
{
NET_SOCK_ID sd = *(int*)ctx;
NET_SOCK_RTN_CODE ret;
NET_ERR err;
ret = NetSock_TxData(sd, buf, sz, ssl->wflags, &err);
if (ret < 0) {
WOLFSSL_MSG("Embed Send error");
if (err == NET_ERR_TX) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_WRITE;
} else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
return ret;
}
/* The Micrium uTCP/IP receive callback
* return : nb bytes read, or error
*/
int MicriumReceive(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
NET_SOCK_ID sd = *(int*)ctx;
NET_SOCK_RTN_CODE ret;
NET_ERR err;
#ifdef WOLFSSL_DTLS
{
int dtls_timeout = wolfSSL_dtls_get_current_timeout(ssl);
if (wolfSSL_dtls(ssl)
&& !wolfSSL_dtls_get_using_nonblock(ssl)
&& dtls_timeout != 0) {
/* needs timeout in milliseconds */
NetSock_CfgTimeoutRxQ_Set(sd, dtls_timeout * 1000, &err);
if (err != NET_SOCK_ERR_NONE) {
WOLFSSL_MSG("NetSock_CfgTimeoutRxQ_Set failed");
}
}
}
#endif
ret = NetSock_RxData(sd, buf, sz, ssl->rflags, &err);
if (ret < 0) {
WOLFSSL_MSG("Embed Receive error");
if (err == NET_ERR_RX || err == NET_SOCK_ERR_RX_Q_EMPTY ||
err == NET_ERR_FAULT_LOCK_ACQUIRE) {
if (!wolfSSL_dtls(ssl) || wolfSSL_dtls_get_using_nonblock(ssl)) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else {
WOLFSSL_MSG("\tSocket timeout");
return WOLFSSL_CBIO_ERR_TIMEOUT;
}
} else if (err == NET_SOCK_ERR_CLOSED) {
WOLFSSL_MSG("Embed receive connection closed");
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
} else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
return ret;
}
/* The Micrium uTCP/IP receivefrom callback
* return : nb bytes read, or error
*/
int MicriumReceiveFrom(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
WOLFSSL_DTLS_CTX* dtlsCtx = (WOLFSSL_DTLS_CTX*)ctx;
NET_SOCK_ID sd = dtlsCtx->rfd;
NET_SOCK_ADDR peer;
NET_SOCK_ADDR_LEN peerSz = sizeof(peer);
NET_SOCK_RTN_CODE ret;
NET_ERR err;
int dtls_timeout = wolfSSL_dtls_get_current_timeout(ssl);
WOLFSSL_ENTER("MicriumReceiveFrom()");
if (ssl->options.handShakeDone)
dtls_timeout = 0;
if (!wolfSSL_dtls_get_using_nonblock(ssl)) {
/* needs timeout in milliseconds */
NetSock_CfgTimeoutRxQ_Set(sd, dtls_timeout * 1000, &err);
if (err != NET_SOCK_ERR_NONE) {
WOLFSSL_MSG("NetSock_CfgTimeoutRxQ_Set failed");
}
}
ret = NetSock_RxDataFrom(sd, buf, sz, ssl->rflags, &peer, &peerSz,
0, 0, 0, &err);
if (ret < 0) {
WOLFSSL_MSG("Embed Receive From error");
if (err == NET_ERR_RX || err == NET_SOCK_ERR_RX_Q_EMPTY ||
err == NET_ERR_FAULT_LOCK_ACQUIRE) {
if (wolfSSL_dtls_get_using_nonblock(ssl)) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
else {
WOLFSSL_MSG("\tSocket timeout");
return WOLFSSL_CBIO_ERR_TIMEOUT;
}
} else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
else {
if (dtlsCtx->peer.sz > 0
&& peerSz != (NET_SOCK_ADDR_LEN)dtlsCtx->peer.sz
&& XMEMCMP(&peer, dtlsCtx->peer.sa, peerSz) != 0) {
WOLFSSL_MSG("\tIgnored packet from invalid peer");
return WOLFSSL_CBIO_ERR_WANT_READ;
}
}
return ret;
}
/* The Micrium uTCP/IP sendto callback
* return : nb bytes sent, or error
*/
int MicriumSendTo(WOLFSSL* ssl, char *buf, int sz, void *ctx)
{
WOLFSSL_DTLS_CTX* dtlsCtx = (WOLFSSL_DTLS_CTX*)ctx;
NET_SOCK_ID sd = dtlsCtx->wfd;
NET_SOCK_RTN_CODE ret;
NET_ERR err;
WOLFSSL_ENTER("MicriumSendTo()");
ret = NetSock_TxDataTo(sd, buf, sz, ssl->wflags,
(NET_SOCK_ADDR*)dtlsCtx->peer.sa,
(NET_SOCK_ADDR_LEN)dtlsCtx->peer.sz,
&err);
if (err < 0) {
WOLFSSL_MSG("Embed Send To error");
if (err == NET_ERR_TX) {
WOLFSSL_MSG("\tWould block");
return WOLFSSL_CBIO_ERR_WANT_WRITE;
} else {
WOLFSSL_MSG("\tGeneral error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
}
return ret;
}
/* Micrium DTLS Generate Cookie callback
* return : number of bytes copied into buf, or error
*/
int MicriumGenerateCookie(WOLFSSL* ssl, byte *buf, int sz, void *ctx)
{
NET_SOCK_ADDR peer;
NET_SOCK_ADDR_LEN peerSz = sizeof(peer);
byte digest[WC_SHA_DIGEST_SIZE];
int ret = 0;
(void)ctx;
XMEMSET(&peer, 0, sizeof(peer));
if (wolfSSL_dtls_get_peer(ssl, (void*)&peer,
(unsigned int*)&peerSz) != WOLFSSL_SUCCESS) {
WOLFSSL_MSG("getpeername failed in MicriumGenerateCookie");
return GEN_COOKIE_E;
}
ret = wc_ShaHash((byte*)&peer, peerSz, digest);
if (ret != 0)
return ret;
if (sz > WC_SHA_DIGEST_SIZE)
sz = WC_SHA_DIGEST_SIZE;
XMEMCPY(buf, digest, sz);
return sz;
}
#endif /* MICRIUM */
#if defined(WOLFSSL_APACHE_MYNEWT) && !defined(WOLFSSL_LWIP)
#include <os/os_error.h>
#include <os/os_mbuf.h>
#include <os/os_mempool.h>
#define MB_NAME "wolfssl_mb"
typedef struct Mynewt_Ctx {
struct mn_socket *mnSocket; /* send/recv socket handler */
struct mn_sockaddr_in mnSockAddrIn; /* socket address */
struct os_mbuf *mnPacket; /* incoming packet handle
for short reads */
int reading; /* reading flag */
/* private */
void *mnMemBuffer; /* memory buffer for mempool */
struct os_mempool mnMempool; /* mempool */
struct os_mbuf_pool mnMbufpool; /* mbuf pool */
} Mynewt_Ctx;
void mynewt_ctx_clear(void *ctx) {
Mynewt_Ctx *mynewt_ctx = (Mynewt_Ctx*)ctx;
if(!mynewt_ctx) return;
if(mynewt_ctx->mnPacket) {
os_mbuf_free_chain(mynewt_ctx->mnPacket);
mynewt_ctx->mnPacket = NULL;
}
os_mempool_clear(&mynewt_ctx->mnMempool);
XFREE(mynewt_ctx->mnMemBuffer, 0, 0);
XFREE(mynewt_ctx, 0, 0);
}
/* return Mynewt_Ctx instance */
void* mynewt_ctx_new() {
int rc = 0;
Mynewt_Ctx *mynewt_ctx;
int mem_buf_count = MYNEWT_VAL(WOLFSSL_MNSOCK_MEM_BUF_COUNT);
int mem_buf_size = MYNEWT_VAL(WOLFSSL_MNSOCK_MEM_BUF_SIZE);
int mempool_bytes = OS_MEMPOOL_BYTES(mem_buf_count, mem_buf_size);
mynewt_ctx = (Mynewt_Ctx *)XMALLOC(sizeof(struct Mynewt_Ctx),
NULL, DYNAMIC_TYPE_TMP_BUFFER);
if(!mynewt_ctx) return NULL;
XMEMSET(mynewt_ctx, 0, sizeof(Mynewt_Ctx));
mynewt_ctx->mnMemBuffer = XMALLOC(mempool_bytes, 0, 0);
if(!mynewt_ctx->mnMemBuffer) {
mynewt_ctx_clear((void*)mynewt_ctx);
return NULL;
}
rc = os_mempool_init(&mynewt_ctx->mnMempool,
mem_buf_count, mem_buf_size,
mynewt_ctx->mnMemBuffer, MB_NAME);
if(rc != 0) {
mynewt_ctx_clear((void*)mynewt_ctx);
return NULL;
}
rc = os_mbuf_pool_init(&mynewt_ctx->mnMbufpool, &mynewt_ctx->mnMempool,
mem_buf_count, mem_buf_size);
if(rc != 0) {
mynewt_ctx_clear((void*)mynewt_ctx);
return NULL;
}
return mynewt_ctx;
}
static void mynewt_sock_writable(void *arg, int err);
static void mynewt_sock_readable(void *arg, int err);
static const union mn_socket_cb mynewt_sock_cbs = {
.socket.writable = mynewt_sock_writable,
.socket.readable = mynewt_sock_readable,
};
static void mynewt_sock_writable(void *arg, int err)
{
/* do nothing */
}
static void mynewt_sock_readable(void *arg, int err)
{
Mynewt_Ctx *mynewt_ctx = (Mynewt_Ctx *)arg;
if (err && mynewt_ctx->reading) {
mynewt_ctx->reading = 0;
}
}
/* The Mynewt receive callback
* return : bytes read, or error
*/
int Mynewt_Receive(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
Mynewt_Ctx *mynewt_ctx = (Mynewt_Ctx*)ctx;
int rc = 0;
struct mn_sockaddr_in from;
struct os_mbuf *m;
int read_sz = 0;
uint16_t total;
if (mynewt_ctx == NULL || mynewt_ctx->mnSocket == NULL) {
WOLFSSL_MSG("Mynewt Recv NULL parameters");
return WOLFSSL_CBIO_ERR_GENERAL;
}
if(mynewt_ctx->mnPacket == NULL) {
mynewt_ctx->mnPacket = os_mbuf_get_pkthdr(&mynewt_ctx->mnMbufpool, 0);
if(mynewt_ctx->mnPacket == NULL) {
return MEMORY_E;
}
mynewt_ctx->reading = 1;
while(mynewt_ctx->reading && rc == 0) {
rc = mn_recvfrom(mynewt_ctx->mnSocket, &m, (struct mn_sockaddr *) &from);
if(rc == MN_ECONNABORTED) {
rc = 0;
mynewt_ctx->reading = 0;
break;
}
if (!(rc == 0 || rc == MN_EAGAIN)) {
WOLFSSL_MSG("Mynewt Recv receive error");
mynewt_ctx->reading = 0;
break;
}
if(rc == 0) {
int len = OS_MBUF_PKTLEN(m);
if(len == 0) {
break;
}
rc = os_mbuf_appendfrom(mynewt_ctx->mnPacket, m, 0, len);
if(rc != 0) {
WOLFSSL_MSG("Mynewt Recv os_mbuf_appendfrom error");
break;
}
os_mbuf_free_chain(m);
m = NULL;
} else if(rc == MN_EAGAIN) {
/* continue to until reading all of packet data. */
rc = 0;
break;
}
}
if(rc != 0) {
mynewt_ctx->reading = 0;
os_mbuf_free_chain(mynewt_ctx->mnPacket);
mynewt_ctx->mnPacket = NULL;
return rc;
}
}
if(mynewt_ctx->mnPacket) {
total = OS_MBUF_PKTLEN(mynewt_ctx->mnPacket);
read_sz = (total >= sz)? sz : total;
os_mbuf_copydata(mynewt_ctx->mnPacket, 0, read_sz, (void*)buf);
os_mbuf_adj(mynewt_ctx->mnPacket, read_sz);
if (read_sz == total) {
WOLFSSL_MSG("Mynewt Recv Drained packet");
os_mbuf_free_chain(mynewt_ctx->mnPacket);
mynewt_ctx->mnPacket = NULL;
}
}
return read_sz;
}
/* The Mynewt send callback
* return : bytes sent, or error
*/
int Mynewt_Send(WOLFSSL* ssl, char *buf, int sz, void *ctx)
{
Mynewt_Ctx *mynewt_ctx = (Mynewt_Ctx*)ctx;
int rc = 0;
struct os_mbuf *m;
int write_sz = 0;
m = os_msys_get_pkthdr(sz, 0);
if (!m) {
WOLFSSL_MSG("Mynewt Send os_msys_get_pkthdr error");
return WOLFSSL_CBIO_ERR_GENERAL;
}
rc = os_mbuf_copyinto(m, 0, buf, sz);
if (rc != 0) {
WOLFSSL_MSG("Mynewt Send os_mbuf_copyinto error");
os_mbuf_free_chain(m);
return rc;
}
rc = mn_sendto(mynewt_ctx->mnSocket, m, (struct mn_sockaddr *)&mynewt_ctx->mnSockAddrIn);
if(rc != 0) {
WOLFSSL_MSG("Mynewt Send mn_sendto error");
os_mbuf_free_chain(m);
return rc;
}
write_sz = sz;
return write_sz;
}
/* like set_fd, but for default NetX context */
void wolfSSL_SetIO_Mynewt(WOLFSSL* ssl, struct mn_socket* mnSocket, struct mn_sockaddr_in* mnSockAddrIn)
{
if (ssl && ssl->mnCtx) {
Mynewt_Ctx *mynewt_ctx = (Mynewt_Ctx *)ssl->mnCtx;
mynewt_ctx->mnSocket = mnSocket;
memcpy(&mynewt_ctx->mnSockAddrIn, mnSockAddrIn, sizeof(struct mn_sockaddr_in));
mn_socket_set_cbs(mynewt_ctx->mnSocket, mnSocket, &mynewt_sock_cbs);
}
}
#endif /* defined(WOLFSSL_APACHE_MYNEWT) && !defined(WOLFSSL_LWIP) */
#ifdef WOLFSSL_UIP
#include <uip.h>
#include <stdio.h>
/* uIP TCP/IP port, using the native tcp/udp socket api.
* TCP and UDP are currently supported with the callbacks below.
*
*/
/* The uIP tcp send callback
* return : bytes sent, or error
*/
int uIPSend(WOLFSSL* ssl, char* buf, int sz, void* _ctx)
{
uip_wolfssl_ctx *ctx = (struct uip_wolfssl_ctx *)_ctx;
int ret;
unsigned int max_sendlen;
int total_written = 0;
(void)ssl;
do {
unsigned int bytes_left = sz - total_written;
max_sendlen = tcp_socket_max_sendlen(&ctx->conn.tcp);
if (bytes_left > max_sendlen) {
printf("Send limited by buffer\r\n");
bytes_left = max_sendlen;
}
if (bytes_left == 0) {
printf("Buffer full!\r\n");
break;
}
ret = tcp_socket_send(&ctx->conn.tcp, (unsigned char *)buf + total_written, bytes_left);
if (ret <= 0)
break;
total_written += ret;
} while(total_written < sz);
if (total_written == 0)
return WOLFSSL_CBIO_ERR_WANT_WRITE;
return total_written;
}
int uIPSendTo(WOLFSSL* ssl, char* buf, int sz, void* _ctx)
{
uip_wolfssl_ctx *ctx = (struct uip_wolfssl_ctx *)_ctx;
int ret = 0;
(void)ssl;
ret = udp_socket_sendto(&ctx->conn.udp, (unsigned char *)buf, sz, &ctx->peer_addr, ctx->peer_port );
if (ret == 0)
return WOLFSSL_CBIO_ERR_WANT_WRITE;
return ret;
}
/* The uIP uTCP/IP receive callback
* return : nb bytes read, or error
*/
int uIPReceive(WOLFSSL *ssl, char *buf, int sz, void *_ctx)
{
uip_wolfssl_ctx *ctx = (uip_wolfssl_ctx *)_ctx;
if (!ctx || !ctx->ssl_rx_databuf)
return -1;
(void)ssl;
if (ctx->ssl_rb_len > 0) {
if (sz > ctx->ssl_rb_len - ctx->ssl_rb_off)
sz = ctx->ssl_rb_len - ctx->ssl_rb_off;
XMEMCPY(buf, ctx->ssl_rx_databuf + ctx->ssl_rb_off, sz);
ctx->ssl_rb_off += sz;
if (ctx->ssl_rb_off >= ctx->ssl_rb_len) {
ctx->ssl_rb_len = 0;
ctx->ssl_rb_off = 0;
}
return sz;
} else {
return WOLFSSL_CBIO_ERR_WANT_READ;
}
}
/* uIP DTLS Generate Cookie callback
* return : number of bytes copied into buf, or error
*/
int uIPGenerateCookie(WOLFSSL* ssl, byte *buf, int sz, void *_ctx)
{
uip_wolfssl_ctx *ctx = (uip_wolfssl_ctx *)_ctx;
byte token[32];
byte digest[WC_SHA_DIGEST_SIZE];
int ret = 0;
XMEMSET(token, 0, sizeof(token));
XMEMCPY(token, &ctx->peer_addr, sizeof(uip_ipaddr_t));
XMEMCPY(token + sizeof(uip_ipaddr_t), &ctx->peer_port, sizeof(word16));
ret = wc_ShaHash(token, sizeof(uip_ipaddr_t) + sizeof(word16), digest);
if (ret != 0)
return ret;
if (sz > WC_SHA_DIGEST_SIZE)
sz = WC_SHA_DIGEST_SIZE;
XMEMCPY(buf, digest, sz);
return sz;
}
#endif /* WOLFSSL_UIP */
#ifdef WOLFSSL_GNRC
#include <net/sock.h>
#include <net/sock/tcp.h>
#include <stdio.h>
/* GNRC TCP/IP port, using the native tcp/udp socket api.
* TCP and UDP are currently supported with the callbacks below.
*
*/
/* The GNRC tcp send callback
* return : bytes sent, or error
*/
int GNRC_SendTo(WOLFSSL* ssl, char* buf, int sz, void* _ctx)
{
sock_tls_t *ctx = (sock_tls_t *)_ctx;
int ret = 0;
(void)ssl;
if (!ctx)
return WOLFSSL_CBIO_ERR_GENERAL;
ret = sock_udp_send(&ctx->conn.udp, (unsigned char *)buf, sz, &ctx->peer_addr);
if (ret == 0)
return WOLFSSL_CBIO_ERR_WANT_WRITE;
return ret;
}
/* The GNRC TCP/IP receive callback
* return : nb bytes read, or error
*/
int GNRC_ReceiveFrom(WOLFSSL *ssl, char *buf, int sz, void *_ctx)
{
sock_udp_ep_t ep;
int ret;
uint32_t timeout = wolfSSL_dtls_get_current_timeout(ssl) * 1000000;
sock_tls_t *ctx = (sock_tls_t *)_ctx;
if (!ctx)
return WOLFSSL_CBIO_ERR_GENERAL;
(void)ssl;
if (wolfSSL_get_using_nonblock(ctx->ssl)) {
timeout = 0;
}
ret = sock_udp_recv(&ctx->conn.udp, buf, sz, timeout, &ep);
if (ret > 0) {
if (ctx->peer_addr.port == 0)
XMEMCPY(&ctx->peer_addr, &ep, sizeof(sock_udp_ep_t));
}
if (ret == -ETIMEDOUT) {
return WOLFSSL_CBIO_ERR_WANT_READ;
}
return ret;
}
/* GNRC DTLS Generate Cookie callback
* return : number of bytes copied into buf, or error
*/
#define GNRC_MAX_TOKEN_SIZE (32)
int GNRC_GenerateCookie(WOLFSSL* ssl, byte *buf, int sz, void *_ctx)
{
sock_tls_t *ctx = (sock_tls_t *)_ctx;
if (!ctx)
return WOLFSSL_CBIO_ERR_GENERAL;
byte token[GNRC_MAX_TOKEN_SIZE];
byte digest[WC_SHA_DIGEST_SIZE];
int ret = 0;
size_t token_size = sizeof(sock_udp_ep_t);
(void)ssl;
if (token_size > GNRC_MAX_TOKEN_SIZE)
token_size = GNRC_MAX_TOKEN_SIZE;
XMEMSET(token, 0, GNRC_MAX_TOKEN_SIZE);
XMEMCPY(token, &ctx->peer_addr, token_size);
ret = wc_ShaHash(token, token_size, digest);
if (ret != 0)
return ret;
if (sz > WC_SHA_DIGEST_SIZE)
sz = WC_SHA_DIGEST_SIZE;
XMEMCPY(buf, digest, sz);
return sz;
}
#endif /* WOLFSSL_GNRC */
#endif /* WOLFCRYPT_ONLY */
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