/* Try to make progress on an SSL handshake by attempting to read the
** next handshake from the peer, and sending any responses.
** For non-blocking sockets, returns PR_ERROR_WOULD_BLOCK if it cannot
** read the next handshake from the underlying socket.
** For SSLv2, returns when handshake is complete or fatal error occurs.
** For SSLv3, returns when handshake is complete, or application data has
** arrived that must be taken by application before handshake can continue,
** or a fatal error occurs.
** Application should use handshake completion callback to tell which.
*/
SECStatus
SSL_ForceHandshake(PRFileDesc *fd)
{
sslSocket *ss;
SECStatus rv = SECFailure;
ss = ssl_FindSocket(fd);
if (!ss) {
SSL_DBG(("%d: SSL[%d]: bad socket in ForceHandshake",
SSL_GETPID(), fd));
return rv;
}
/* Don't waste my time */
if (!ss->opt.useSecurity)
return SECSuccess;
if (!ssl_SocketIsBlocking(ss)) {
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
int sent = ssl_SendSavedWriteData(ss);
if ((sent < 0) && (PORT_GetError() != PR_WOULD_BLOCK_ERROR)) {
ssl_ReleaseXmitBufLock(ss);
return SECFailure;
}
}
ssl_ReleaseXmitBufLock(ss);
}
ssl_Get1stHandshakeLock(ss);
if (ss->version >= SSL_LIBRARY_VERSION_3_0) {
int gatherResult;
ssl_GetRecvBufLock(ss);
gatherResult = ssl3_GatherCompleteHandshake(ss, 0);
ssl_ReleaseRecvBufLock(ss);
if (gatherResult > 0) {
rv = SECSuccess;
} else if (gatherResult == 0) {
PORT_SetError(PR_END_OF_FILE_ERROR);
} else if (gatherResult == SECWouldBlock) {
PORT_SetError(PR_WOULD_BLOCK_ERROR);
}
} else if (!ss->firstHsDone) {
rv = ssl_Do1stHandshake(ss);
} else {
/* tried to force handshake on an SSL 2 socket that has
** already completed the handshake. */
rv = SECSuccess; /* just pretend we did it. */
}
ssl_Release1stHandshakeLock(ss);
return rv;
}
int
ssl_SecureRecv(sslSocket *ss, unsigned char *buf, int len, int flags)
{
int rv = 0;
if (ss->shutdownHow & ssl_SHUTDOWN_RCV) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
return PR_FAILURE;
}
if (flags & ~PR_MSG_PEEK) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
return PR_FAILURE;
}
if (!ssl_SocketIsBlocking(ss) && !ss->opt.fdx) {
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
rv = ssl_SendSavedWriteData(ss);
if ((rv < 0) && (PORT_GetError() != PR_WOULD_BLOCK_ERROR)) {
ssl_ReleaseXmitBufLock(ss);
return SECFailure;
}
}
ssl_ReleaseXmitBufLock(ss);
}
rv = 0;
if (!PR_CLIST_IS_EMPTY(&ss->ssl3.hs.bufferedEarlyData)) {
PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_TLS_1_3);
return tls13_Read0RttData(ss, buf, len);
}
/* If any of these is non-zero, the initial handshake is not done. */
if (!ss->firstHsDone) {
ssl_Get1stHandshakeLock(ss);
if (ss->handshake) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
return rv;
}
if (len == 0)
return 0;
rv = DoRecv(ss, (unsigned char *)buf, len, flags);
SSL_TRC(2, ("%d: SSL[%d]: recving %d bytes securely (errno=%d)",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
return rv;
}
int
ssl_SecureRecv(sslSocket *ss, unsigned char *buf, int len, int flags)
{
sslSecurityInfo *sec;
int rv = 0;
sec = &ss->sec;
if (ss->shutdownHow & ssl_SHUTDOWN_RCV) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
return PR_FAILURE;
}
if (flags & ~PR_MSG_PEEK) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
return PR_FAILURE;
}
if (!ssl_SocketIsBlocking(ss) && !ss->opt.fdx) {
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
rv = ssl_SendSavedWriteData(ss);
if ((rv < 0) && (PORT_GetError() != PR_WOULD_BLOCK_ERROR)) {
ssl_ReleaseXmitBufLock(ss);
return SECFailure;
}
/* XXX short write? */
}
ssl_ReleaseXmitBufLock(ss);
}
rv = 0;
/* If any of these is non-zero, the initial handshake is not done. */
if (!ss->firstHsDone) {
ssl_Get1stHandshakeLock(ss);
if (ss->handshake || ss->nextHandshake || ss->securityHandshake) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
return rv;
}
if (len == 0) return 0;
rv = DoRecv(ss, (unsigned char*) buf, len, flags);
SSL_TRC(2, ("%d: SSL[%d]: recving %d bytes securely (errno=%d)",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
return rv;
}
/* Caller holds the SSL Socket's write lock. SSL_LOCK_WRITER(ss) */
int
ssl_SecureSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
{
int rv = 0;
PRBool falseStart = PR_FALSE;
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: sending %d bytes",
SSL_GETPID(), ss->fd, len));
if (ss->shutdownHow & ssl_SHUTDOWN_SEND) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
rv = PR_FAILURE;
goto done;
}
if (flags) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
rv = ssl_SendSavedWriteData(ss);
if (rv >= 0 && ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
PORT_SetError(PR_WOULD_BLOCK_ERROR);
rv = SECFailure;
}
}
ssl_ReleaseXmitBufLock(ss);
if (rv < 0) {
goto done;
}
if (len > 0)
ss->writerThread = PR_GetCurrentThread();
/* If any of these is non-zero, the initial handshake is not done. */
if (!ss->firstHsDone) {
ssl_Get1stHandshakeLock(ss);
if (ss->opt.enableFalseStart &&
ss->version >= SSL_LIBRARY_VERSION_3_0) {
ssl_GetSSL3HandshakeLock(ss);
falseStart = ss->ssl3.hs.canFalseStart;
ssl_ReleaseSSL3HandshakeLock(ss);
}
if (!falseStart &&
(ss->handshake || ss->nextHandshake || ss->securityHandshake)) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
ss->writerThread = NULL;
goto done;
}
/* Check for zero length writes after we do housekeeping so we make forward
* progress.
*/
if (len == 0) {
rv = 0;
goto done;
}
PORT_Assert(buf != NULL);
if (!buf) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
if (!ss->firstHsDone) {
PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_3_0);
#ifdef DEBUG
ssl_GetSSL3HandshakeLock(ss);
PORT_Assert(ss->ssl3.hs.canFalseStart);
ssl_ReleaseSSL3HandshakeLock(ss);
#endif
SSL_TRC(3, ("%d: SSL[%d]: SecureSend: sending data due to false start",
SSL_GETPID(), ss->fd));
}
/* Send out the data using one of these functions:
* ssl2_SendClear, ssl2_SendStream, ssl2_SendBlock,
* ssl3_SendApplicationData
*/
ssl_GetXmitBufLock(ss);
rv = (*ss->sec.send)(ss, buf, len, flags);
ssl_ReleaseXmitBufLock(ss);
ss->writerThread = NULL;
done:
if (rv < 0) {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count, error %d",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
} else {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count",
SSL_GETPID(), ss->fd, rv));
}
return rv;
}
int
ssl_SecureSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
{
int rv = 0;
PRBool falseStart = PR_FALSE;
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: sending %d bytes",
SSL_GETPID(), ss->fd, len));
if (ss->shutdownHow & ssl_SHUTDOWN_SEND) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
rv = PR_FAILURE;
goto done;
}
if (flags) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
rv = ssl_SendSavedWriteData(ss);
if (rv >= 0 && ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
PORT_SetError(PR_WOULD_BLOCK_ERROR);
rv = SECFailure;
}
}
ssl_ReleaseXmitBufLock(ss);
if (rv < 0) {
goto done;
}
if (len > 0)
ss->writerThread = PR_GetCurrentThread();
if (!ss->firstHsDone) {
ssl_Get1stHandshakeLock(ss);
if (ss->opt.enableFalseStart &&
ss->version >= SSL_LIBRARY_VERSION_3_0) {
ssl_GetSSL3HandshakeLock(ss);
falseStart = ss->ssl3.hs.canFalseStart;
ssl_ReleaseSSL3HandshakeLock(ss);
}
if (!falseStart &&
(ss->handshake || ss->nextHandshake || ss->securityHandshake)) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
ss->writerThread = NULL;
goto done;
}
if (len == 0) {
rv = 0;
goto done;
}
PORT_Assert(buf != NULL);
if (!buf) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
if (!ss->firstHsDone) {
PORT_Assert(ss->version >= SSL_LIBRARY_VERSION_3_0);
#ifdef DEBUG
ssl_GetSSL3HandshakeLock(ss);
PORT_Assert(ss->ssl3.hs.canFalseStart);
ssl_ReleaseSSL3HandshakeLock(ss);
#endif
SSL_TRC(3, ("%d: SSL[%d]: SecureSend: sending data due to false start",
SSL_GETPID(), ss->fd));
}
ssl_GetXmitBufLock(ss);
rv = (*ss->sec.send)(ss, buf, len, flags);
ssl_ReleaseXmitBufLock(ss);
ss->writerThread = NULL;
done:
if (rv < 0) {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count, error %d",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
} else {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count",
SSL_GETPID(), ss->fd, rv));
}
return rv;
}
/* Caller holds the SSL Socket's write lock. SSL_LOCK_WRITER(ss) */
int
ssl_SecureSend(sslSocket *ss, const unsigned char *buf, int len, int flags)
{
int rv = 0;
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: sending %d bytes",
SSL_GETPID(), ss->fd, len));
if (ss->shutdownHow & ssl_SHUTDOWN_SEND) {
PORT_SetError(PR_SOCKET_SHUTDOWN_ERROR);
rv = PR_FAILURE;
goto done;
}
if (flags) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
ssl_GetXmitBufLock(ss);
if (ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
rv = ssl_SendSavedWriteData(ss);
if (rv >= 0 && ss->pendingBuf.len != 0) {
PORT_Assert(ss->pendingBuf.len > 0);
PORT_SetError(PR_WOULD_BLOCK_ERROR);
rv = SECFailure;
}
}
ssl_ReleaseXmitBufLock(ss);
if (rv < 0) {
goto done;
}
if (len > 0)
ss->writerThread = PR_GetCurrentThread();
/* Check to see if we can write even though we're not finished.
*
* Case 1: False start
* Case 2: TLS 1.3 0-RTT
*/
if (!ss->firstHsDone) {
PRBool falseStart = PR_FALSE;
ssl_Get1stHandshakeLock(ss);
if (ss->opt.enableFalseStart ||
(ss->opt.enable0RttData && !ss->sec.isServer)) {
ssl_GetSSL3HandshakeLock(ss);
/* The client can sometimes send before the handshake is fully
* complete. In TLS 1.2: false start; in TLS 1.3: 0-RTT. */
falseStart = ss->ssl3.hs.canFalseStart ||
ss->ssl3.hs.zeroRttState == ssl_0rtt_sent ||
ss->ssl3.hs.zeroRttState == ssl_0rtt_accepted;
ssl_ReleaseSSL3HandshakeLock(ss);
}
if (!falseStart && ss->handshake) {
rv = ssl_Do1stHandshake(ss);
}
ssl_Release1stHandshakeLock(ss);
}
if (rv < 0) {
ss->writerThread = NULL;
goto done;
}
/* Check for zero length writes after we do housekeeping so we make forward
* progress.
*/
if (len == 0) {
rv = 0;
goto done;
}
PORT_Assert(buf != NULL);
if (!buf) {
PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
rv = PR_FAILURE;
goto done;
}
if (!ss->firstHsDone) {
#ifdef DEBUG
ssl_GetSSL3HandshakeLock(ss);
PORT_Assert(!ss->sec.isServer &&
(ss->ssl3.hs.canFalseStart ||
ss->ssl3.hs.zeroRttState == ssl_0rtt_sent ||
ss->ssl3.hs.zeroRttState == ssl_0rtt_accepted));
ssl_ReleaseSSL3HandshakeLock(ss);
#endif
SSL_TRC(3, ("%d: SSL[%d]: SecureSend: sending data due to false start",
SSL_GETPID(), ss->fd));
}
ssl_GetXmitBufLock(ss);
rv = ssl3_SendApplicationData(ss, buf, len, flags);
ssl_ReleaseXmitBufLock(ss);
ss->writerThread = NULL;
done:
if (rv < 0) {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count, error %d",
SSL_GETPID(), ss->fd, rv, PORT_GetError()));
} else {
SSL_TRC(2, ("%d: SSL[%d]: SecureSend: returning %d count",
SSL_GETPID(), ss->fd, rv));
}
return rv;
}