mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 21:23:58 +01:00
more futzing towards tls
not there yet svn:r429
This commit is contained in:
Roger Dingledine
parent
99035f3520
commit
3fa170e11f
@ -129,6 +129,7 @@ int flush_buf(int s, char **buf, int *buflen, int *buf_flushlen, int *buf_datale
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// log_fn(LOG_DEBUG,"flushed %d bytes, %d ready to flush, %d remain.",
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// write_result,*buf_flushlen,*buf_datalen);
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return *buf_flushlen;
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/* XXX USE_TLS should change to return write_result like any sane function would */
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}
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}
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@ -136,8 +137,9 @@ int flush_buf_tls(tor_tls *tls, char **buf, int *buflen, int *buf_flushlen, int
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{
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int r;
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assert(tls && *buf && buflen && buf_datalen);
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if (*buf_flushlen == 0)
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return 0;
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/* we want to let tls write even if flushlen is zero, because it might
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* have a partial record pending */
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r = tor_tls_write(tls, *buf, *buf_flushlen);
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if (r < 0) {
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return r;
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@ -92,7 +92,7 @@ connection_t *connection_new(int type) {
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conn->timestamp_lastread = now.tv_sec;
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conn->timestamp_lastwritten = now.tv_sec;
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#ifndef TOR_TLS
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#ifndef USE_TLS
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if (connection_speaks_cells(conn)) {
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conn->f_crypto = crypto_new_cipher_env(CONNECTION_CIPHER);
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if (!conn->f_crypto) {
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@ -107,7 +107,6 @@ connection_t *connection_new(int type) {
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}
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}
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#endif
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conn->done_sending = conn->done_receiving = 0;
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return conn;
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}
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@ -123,9 +122,9 @@ void connection_free(connection_t *conn) {
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if(connection_speaks_cells(conn)) {
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directory_set_dirty();
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#ifdef TOR_TLS
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if (conn->SSL)
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crypt_SSL_free(conn->SSL);
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#ifdef USE_TLS
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if (conn->tls)
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tor_tls_free(conn->tls);
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#else
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if (conn->f_crypto)
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crypto_free_cipher_env(conn->f_crypto);
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@ -245,10 +244,8 @@ int connection_handle_listener_read(connection_t *conn, int new_type, int new_st
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return 0;
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}
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int retry_all_connections(uint16_t or_listenport, uint16_t ap_listenport, uint16_t dir_listenport) {
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/* start all connections that should be up but aren't */
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int retry_all_connections(uint16_t or_listenport, uint16_t ap_listenport, uint16_t dir_listenport) {
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struct sockaddr_in bindaddr; /* where to bind */
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if(or_listenport) {
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@ -316,12 +313,13 @@ int connection_handle_read(connection_t *conn) {
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log_fn(LOG_DEBUG,"receiver bucket reached 0 before handshake finished. Closing.");
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return -1;
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}
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return 0;
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} /* end switch */
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return 0;
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}
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/* return -1 if we want to break conn, else return 0 */
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int connection_read_to_buf(connection_t *conn) {
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int read_result;
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int result;
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int at_most;
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assert((connection_speaks_cells(conn) && conn->receiver_bucket >= 0) ||
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@ -344,27 +342,51 @@ int connection_read_to_buf(connection_t *conn) {
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if(conn->receiver_bucket >= 0 && at_most > conn->receiver_bucket)
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at_most = conn->receiver_bucket;
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read_result = read_to_buf(conn->s, at_most, &conn->inbuf, &conn->inbuflen,
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#ifdef USE_TLS
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if(connection_speaks_cells(conn) && conn->state != OR_CONN_STATE_CONNECTING) {
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if(conn->state == OR_CONN_STATE_HANDSHAKING) {
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result = tor_tls_handshake(conn->tls)
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if(result == TOR_TLS_DONE) {
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conn->state = OR_CONN_STATE_OPEN;
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log_fn(LOG_DEBUG,"tls handshake done, now open.");
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}
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} else { /* open, or closing */
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result = read_to_buf_tls(conn->tls, at_most, &conn->inbuf,
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&conn->inbuflen, &conn->inbuf_datalen);
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}
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switch(result) {
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case TOR_TLS_ERROR:
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case TOR_TLS_CLOSE:
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log_fn(LOG_DEBUG,"tls error. breaking.");
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return -1; /* XXX deal with close better */
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case TOR_TLS_WANT_WRITE:
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connection_start_writing(conn);
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return 0;
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case TOR_TLS_WANT_READ: /* we're already reading */
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case TOR_TLS_DONE: /* no data read, so nothing to process */
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return 0;
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}
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} else
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#endif
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{
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result = read_to_buf(conn->s, at_most, &conn->inbuf, &conn->inbuflen,
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&conn->inbuf_datalen, &conn->inbuf_reached_eof);
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// log(LOG_DEBUG,"connection_read_to_buf(): read_to_buf returned %d.",read_result);
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if(read_result >= 0) {
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global_read_bucket -= read_result; assert(global_read_bucket >= 0);
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if(result < 0)
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return -1;
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}
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global_read_bucket -= result; assert(global_read_bucket >= 0);
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if(connection_speaks_cells(conn))
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conn->receiver_bucket -= read_result;
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conn->receiver_bucket -= result;
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if(conn->receiver_bucket == 0 || global_read_bucket == 0) {
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log_fn(LOG_DEBUG,"buckets (%d, %d) exhausted. Pausing.", global_read_bucket, conn->receiver_bucket);
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conn->wants_to_read = 1;
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connection_stop_reading(conn);
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/* If we're not in 'open' state here, then we're never going to finish the
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* handshake, because we'll never increment the receiver_bucket. But we
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* can't check for that here, because the buf we just read might have enough
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* on it to finish the handshake. So we check for that in connection_handle_read().
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*/
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}
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}
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return read_result;
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return 0;
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}
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int connection_fetch_from_buf(char *string, int len, connection_t *conn) {
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@ -388,9 +410,10 @@ int connection_flush_buf(connection_t *conn) {
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&conn->outbuf_flushlen, &conn->outbuf_datalen);
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}
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/* return -1 if you want to break the conn, else return 0 */
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int connection_handle_write(connection_t *conn) {
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struct timeval now;
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int retval;
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int result;
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if(connection_is_listener(conn)) {
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log_fn(LOG_DEBUG,"Got a listener socket. Can't happen!");
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@ -400,25 +423,57 @@ int connection_handle_write(connection_t *conn) {
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my_gettimeofday(&now);
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conn->timestamp_lastwritten = now.tv_sec;
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#ifdef TOR_TLS
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if(connection_speaks_cells(conn)) {
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retval = flush_buf_SSL(conn->SSL, &conn->outbuf, &conn->outbuflen,
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#ifdef USE_TLS
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if(connection_speaks_cells(conn) && conn->state != OR_CONN_STATE_CONNECTING) {
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if(conn->state == OR_CONN_STATE_HANDSHAKING) {
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result = tor_tls_handshake(conn->tls)
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if(result == TOR_TLS_DONE) {
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conn->state = OR_CONN_STATE_OPEN;
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log_fn(LOG_DEBUG,"tls handshake done, now open.");
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}
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} else { /* open, or closing */
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result = flush_buf_tls(conn->tls, &conn->outbuf, &conn->outbuflen,
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&conn->outbuf_flushlen, &conn->outbuf_datalen);
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...
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}
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switch(result) {
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case TOR_TLS_ERROR:
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case TOR_TLS_CLOSE:
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log_fn(LOG_DEBUG,"tls error. breaking.");
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return -1; /* XXX deal with close better */
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case TOR_TLS_WANT_WRITE:
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/* we're already writing */
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return 0;
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case TOR_TLS_WANT_READ:
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/* Make sure to avoid a loop if the receive buckets are empty. */
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if(!connection_is_reading(conn)) {
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connection_stop_writing(conn);
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conn->wants_to_write = 1;
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/* we'll start reading again when the next second arrives,
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* and then also start writing again.
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*/
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}
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/* else no problem, we're already reading */
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return 0;
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case TOR_TLS_DONE:
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/* for TOR_TLS_DONE, fall through to check if the flushlen
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* is empty, so we can stop writing.
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*/
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}
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} else
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#endif
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{
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retval = flush_buf(conn->s, &conn->outbuf, &conn->outbuflen,
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&conn->outbuf_flushlen, &conn->outbuf_datalen);
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if(flush_buf(conn->s, &conn->outbuf, &conn->outbuflen,
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&conn->outbuf_flushlen, &conn->outbuf_datalen) < 0)
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return -1;
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/* conns in CONNECTING state will fall through... */
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if(retval == 0) { /* it's done flushing */
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retval = connection_finished_flushing(conn); /* ...and get handled here. */
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}
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}
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return retval;
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if(!connection_wants_to_flush(conn)) /* it's done flushing */
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if(connection_finished_flushing(conn) < 0) /* ...and get handled here. */
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return -1;
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return 0;
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}
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int connection_write_to_buf(char *string, int len, connection_t *conn) {
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@ -496,13 +551,16 @@ int connection_write_cell_to_buf(const cell_t *cellp, connection_t *conn) {
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cell_pack(n, cellp);
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#ifndef USE_TLS
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if(connection_encrypt_cell(n,conn)<0) {
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return -1;
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}
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#endif
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return connection_write_to_buf(n, CELL_NETWORK_SIZE, conn);
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}
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#ifndef USE_TLS
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int connection_encrypt_cell(char *cellp, connection_t *conn) {
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char cryptcell[CELL_NETWORK_SIZE];
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#if 0
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@ -535,6 +593,7 @@ int connection_encrypt_cell(char *cellp, connection_t *conn) {
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memcpy(cellp,cryptcell,CELL_NETWORK_SIZE);
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return 0;
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}
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#endif
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int connection_process_inbuf(connection_t *conn) {
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@ -705,18 +764,20 @@ int connection_finished_flushing(connection_t *conn) {
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int connection_process_cell_from_inbuf(connection_t *conn) {
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/* check if there's a whole cell there.
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* if yes, pull it off, decrypt it, and process it.
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* if yes, pull it off, decrypt it if we're not doing TLS, and process it.
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*/
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char crypted[CELL_NETWORK_SIZE];
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char outbuf[1024];
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char networkcell[CELL_NETWORK_SIZE];
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char buf[CELL_NETWORK_SIZE];
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// int x;
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cell_t cell;
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if(conn->inbuf_datalen < CELL_NETWORK_SIZE) /* entire response available? */
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return 0; /* not yet */
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connection_fetch_from_buf(crypted,CELL_NETWORK_SIZE,conn);
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#ifdef USE_TLS
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connection_fetch_from_buf(buf, CELL_NETWORK_SIZE, conn);
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#else
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connection_fetch_from_buf(networkcell, CELL_NETWORK_SIZE, conn);
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#if 0
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printf("Cell header crypttext: ");
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for(x=0;x<8;x++) {
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@ -725,7 +786,7 @@ int connection_process_cell_from_inbuf(connection_t *conn) {
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printf("\n");
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#endif
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/* decrypt */
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if(crypto_cipher_decrypt(conn->b_crypto,crypted,CELL_NETWORK_SIZE,outbuf)) {
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if(crypto_cipher_decrypt(conn->b_crypto, networkcell, CELL_NETWORK_SIZE, buf)) {
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log_fn(LOG_ERR,"Decryption failed, dropping.");
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return connection_process_inbuf(conn); /* process the remainder of the buffer */
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}
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@ -736,10 +797,11 @@ int connection_process_cell_from_inbuf(connection_t *conn) {
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printf("%u ",outbuf[x]);
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}
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printf("\n");
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#endif
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#endif
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/* retrieve cell info from outbuf (create the host-order struct from the network-order string) */
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cell_unpack(&cell, outbuf);
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/* retrieve cell info from buf (create the host-order struct from the network-order string) */
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cell_unpack(&cell, buf);
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// log_fn(LOG_DEBUG,"Decrypted cell is of type %u (ACI %u).",cellp->command,cellp->aci);
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command_process_cell(&cell, conn);
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@ -6,7 +6,7 @@
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extern or_options_t options; /* command-line and config-file options */
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#ifndef TOR_TLS
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#ifndef USE_TLS
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static int or_handshake_op_send_keys(connection_t *conn);
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static int or_handshake_op_finished_sending_keys(connection_t *conn);
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@ -35,17 +35,18 @@ int connection_or_process_inbuf(connection_t *conn) {
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return -1;
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}
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#ifdef USE_TLS
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assert(conn->state == OR_CONN_STATE_OPEN);
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return connection_process_cell_from_inbuf(conn);
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#else
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// log(LOG_DEBUG,"connection_or_process_inbuf(): state %d.",conn->state);
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switch(conn->state) {
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#ifndef TOR_TLS
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case OR_CONN_STATE_CLIENT_AUTH_WAIT:
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return or_handshake_client_process_auth(conn);
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case OR_CONN_STATE_SERVER_AUTH_WAIT:
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return or_handshake_server_process_auth(conn);
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case OR_CONN_STATE_SERVER_NONCE_WAIT:
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return or_handshake_server_process_nonce(conn);
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#endif
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case OR_CONN_STATE_OPEN:
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return connection_process_cell_from_inbuf(conn);
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default:
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@ -53,6 +54,7 @@ int connection_or_process_inbuf(connection_t *conn) {
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}
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return 0;
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#endif
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}
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int connection_or_finished_flushing(connection_t *conn) {
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@ -61,9 +63,13 @@ int connection_or_finished_flushing(connection_t *conn) {
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assert(conn && conn->type == CONN_TYPE_OR);
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switch(conn->state) {
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#ifndef USE_TLS
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case OR_CONN_STATE_OP_SENDING_KEYS:
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return or_handshake_op_finished_sending_keys(conn);
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case OR_CONN_STATE_CLIENT_CONNECTING:
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#else
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case OR_CONN_STATE_CONNECTING:
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#endif
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if (getsockopt(conn->s, SOL_SOCKET, SO_ERROR, (void*)&e, &len) < 0) { /* not yet */
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if(!ERRNO_CONN_EINPROGRESS(errno)){
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/* yuck. kill it. */
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@ -78,6 +84,9 @@ int connection_or_finished_flushing(connection_t *conn) {
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log_fn(LOG_DEBUG,"OR connection to router %s:%u established.",
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conn->address,conn->port);
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#ifdef USE_TLS
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call TLS new, and start the TLS handshake
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#else
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if(options.OnionRouter)
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return or_handshake_client_send_auth(conn);
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else
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@ -98,17 +107,14 @@ int connection_or_finished_flushing(connection_t *conn) {
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conn->state = OR_CONN_STATE_SERVER_NONCE_WAIT;
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connection_watch_events(conn, POLLIN);
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return 0;
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#endif
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case OR_CONN_STATE_OPEN:
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/* FIXME down the road, we'll clear out circuits that are pending to close */
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connection_stop_writing(conn);
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return 0;
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default:
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log_fn(LOG_DEBUG,"BUG: called in unexpected state.");
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log_fn(LOG_ERR,"BUG: called in unexpected state.");
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return 0;
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}
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return 0;
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}
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/*********************/
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@ -659,7 +665,7 @@ connection_or_set_open(connection_t *conn) {
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connection_watch_events(conn, POLLIN);
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}
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#ifndef TOR_TLS
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#ifndef USE_TLS
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static void
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conn_or_init_crypto(connection_t *conn) {
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//int x;
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@ -212,6 +212,10 @@ void connection_watch_events(connection_t *conn, short events) {
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poll_array[conn->poll_index].events = events;
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}
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int connection_is_reading(connection_t *conn) {
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return poll_array[conn->poll_index].events & POLLIN;
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}
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void connection_stop_reading(connection_t *conn) {
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assert(conn && conn->poll_index < nfds);
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@ -312,8 +316,7 @@ static void check_conn_marked(int i) {
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static int prepare_for_poll(void) {
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int i;
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// connection_t *conn = NULL;
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connection_t *tmpconn;
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connection_t *conn;
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struct timeval now; //soonest;
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static long current_second = 0; /* from previous calls to gettimeofday */
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static long time_to_fetch_directory = 0;
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@ -355,37 +358,41 @@ static int prepare_for_poll(void) {
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/* do housekeeping for each connection */
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for(i=0;i<nfds;i++) {
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tmpconn = connection_array[i];
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if(connection_receiver_bucket_should_increase(tmpconn)) {
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tmpconn->receiver_bucket += tmpconn->bandwidth;
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// log_fn(LOG_DEBUG,"Receiver bucket %d now %d.", i, tmpconn->receiver_bucket);
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conn = connection_array[i];
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if(connection_receiver_bucket_should_increase(conn)) {
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conn->receiver_bucket += conn->bandwidth;
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// log_fn(LOG_DEBUG,"Receiver bucket %d now %d.", i, conn->receiver_bucket);
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}
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if(tmpconn->wants_to_read == 1 /* it's marked to turn reading back on now */
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if(conn->wants_to_read == 1 /* it's marked to turn reading back on now */
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&& global_read_bucket > 0 /* and we're allowed to read */
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&& tmpconn->receiver_bucket != 0) { /* and either an edge conn or non-empty bucket */
|
||||
tmpconn->wants_to_read = 0;
|
||||
connection_start_reading(tmpconn);
|
||||
&& conn->receiver_bucket != 0) { /* and either an edge conn or non-empty bucket */
|
||||
conn->wants_to_read = 0;
|
||||
connection_start_reading(conn);
|
||||
if(conn->wants_to_write == 1) {
|
||||
conn->wants_to_write = 0;
|
||||
connection_start_writing(conn);
|
||||
}
|
||||
}
|
||||
|
||||
/* check connections to see whether we should send a keepalive, expire, or wait */
|
||||
if(!connection_speaks_cells(tmpconn))
|
||||
if(!connection_speaks_cells(conn))
|
||||
continue; /* this conn type doesn't send cells */
|
||||
if(now.tv_sec >= tmpconn->timestamp_lastwritten + options.KeepalivePeriod) {
|
||||
if((!options.OnionRouter && !circuit_get_by_conn(tmpconn)) ||
|
||||
(!connection_state_is_open(tmpconn))) {
|
||||
if(now.tv_sec >= conn->timestamp_lastwritten + options.KeepalivePeriod) {
|
||||
if((!options.OnionRouter && !circuit_get_by_conn(conn)) ||
|
||||
(!connection_state_is_open(conn))) {
|
||||
/* we're an onion proxy, with no circuits; or our handshake has expired. kill it. */
|
||||
log(LOG_DEBUG,"prepare_for_poll(): Expiring connection to %d (%s:%d).",
|
||||
i,tmpconn->address, tmpconn->port);
|
||||
tmpconn->marked_for_close = 1;
|
||||
i,conn->address, conn->port);
|
||||
conn->marked_for_close = 1;
|
||||
} else {
|
||||
/* either a full router, or we've got a circuit. send a padding cell. */
|
||||
// log(LOG_DEBUG,"prepare_for_poll(): Sending keepalive to (%s:%d)",
|
||||
// tmpconn->address, tmpconn->port);
|
||||
// conn->address, conn->port);
|
||||
memset(&cell,0,sizeof(cell_t));
|
||||
cell.command = CELL_PADDING;
|
||||
if(connection_write_cell_to_buf(&cell, tmpconn) < 0)
|
||||
tmpconn->marked_for_close = 1;
|
||||
if(connection_write_cell_to_buf(&cell, conn) < 0)
|
||||
conn->marked_for_close = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -442,6 +449,10 @@ static int do_main_loop(void) {
|
||||
set_signing_privatekey(prkey);
|
||||
}
|
||||
|
||||
#ifdef USE_TLS
|
||||
make the tls context here
|
||||
#endif
|
||||
|
||||
/* start up the necessary connections based on which ports are
|
||||
* non-zero. This is where we try to connect to all the other ORs,
|
||||
* and start the listeners.
|
||||
|
||||
@ -283,6 +283,9 @@ struct connection_t {
|
||||
uint8_t wants_to_read; /* should we start reading again once
|
||||
* the bandwidth throttler allows it?
|
||||
*/
|
||||
uint8_t wants_to_write; /* should we start writing again once
|
||||
* the bandwidth throttler allows reads?
|
||||
*/
|
||||
int s; /* our socket */
|
||||
int poll_index; /* index of this conn into the poll_array */
|
||||
int marked_for_close; /* should we close this conn on the next
|
||||
@ -642,7 +645,9 @@ int connection_state_is_open(connection_t *conn);
|
||||
|
||||
int connection_send_destroy(aci_t aci, connection_t *conn);
|
||||
int connection_send_connected(aci_t aci, connection_t *conn);
|
||||
#ifndef USE_TLS
|
||||
int connection_encrypt_cell(char *cellp, connection_t *conn);
|
||||
#endif
|
||||
int connection_write_cell_to_buf(const cell_t *cellp, connection_t *conn);
|
||||
|
||||
int connection_process_inbuf(connection_t *conn);
|
||||
@ -751,6 +756,7 @@ connection_t *connection_get_by_type_state(int type, int state);
|
||||
connection_t *connection_get_by_type_state_lastwritten(int type, int state);
|
||||
|
||||
void connection_watch_events(connection_t *conn, short events);
|
||||
int connection_is_reading(connection_t *conn);
|
||||
void connection_stop_reading(connection_t *conn);
|
||||
void connection_start_reading(connection_t *conn);
|
||||
void connection_stop_writing(connection_t *conn);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user