Index: src/tls/OFOpenSSLTLSStream.m
==================================================================
--- src/tls/OFOpenSSLTLSStream.m
+++ src/tls/OFOpenSSLTLSStream.m
@@ -124,11 +124,11 @@
 		}
 	}
 
 	ret = SSL_read_ex(_SSL, buffer, length, &bytesRead);
 
-	if (BIO_ctrl_pending(_writeBIO) > 0) {
+	while (BIO_ctrl_pending(_writeBIO) > 0) {
 		int tmp = BIO_read(_writeBIO, _buffer, bufferSize);
 
 		OFEnsure(tmp >= 0);
 
 		[_underlyingStream writeBuffer: _buffer length: tmp];
@@ -176,11 +176,11 @@
 						   requestedLength: length
 						      bytesWritten: bytesWritten
 							     errNo: errNo];
 	}
 
-	if (BIO_ctrl_pending(_writeBIO) > 0) {
+	while (BIO_ctrl_pending(_writeBIO) > 0) {
 		int tmp = BIO_read(_writeBIO, _buffer, bufferSize);
 
 		OFEnsure(tmp >= 0);
 
 		[_underlyingStream writeBuffer: _buffer length: tmp];
@@ -256,11 +256,11 @@
 				      errorCode: initFailedErrorCode];
 	}
 
 	status = SSL_do_handshake(_SSL);
 
-	if (BIO_ctrl_pending(_writeBIO) > 0) {
+	while (BIO_ctrl_pending(_writeBIO) > 0) {
 		int tmp = BIO_read(_writeBIO, _buffer, bufferSize);
 
 		OFEnsure(tmp >= 0);
 
 		[_underlyingStream writeBuffer: _buffer length: tmp];
@@ -315,11 +315,11 @@
 		OFEnsure(BIO_write(_readBIO, buffer, (int)length) ==
 		    (int)length);
 
 		status = SSL_do_handshake(_SSL);
 
-		if (BIO_ctrl_pending(_writeBIO) > 0) {
+		while (BIO_ctrl_pending(_writeBIO) > 0) {
 			int tmp = BIO_read(_writeBIO, buffer, bufferSize);
 
 			OFEnsure(tmp >= 0);
 
 			[_underlyingStream writeBuffer: _buffer length: tmp];
@@ -369,11 +369,11 @@
 		static const OFTLSStreamErrorCode unknownErrorCode =
 		    OFTLSStreamErrorCodeUnknown;
 		int status;
 		OFRunLoopMode runLoopMode;
 
-		if (BIO_ctrl_pending(_writeBIO) > 0) {
+		while (BIO_ctrl_pending(_writeBIO) > 0) {
 			int tmp = BIO_read(_writeBIO, _buffer, bufferSize);
 
 			OFEnsure(tmp >= 0);
 
 			[_underlyingStream writeBuffer: _buffer length: tmp];
@@ -380,11 +380,11 @@
 			[_underlyingStream flushWriteBuffer];
 		}
 
 		status = SSL_do_handshake(_SSL);
 
-		if (BIO_ctrl_pending(_writeBIO) > 0) {
+		while (BIO_ctrl_pending(_writeBIO) > 0) {
 			int tmp = BIO_read(_writeBIO, _buffer, bufferSize);
 
 			OFEnsure(tmp >= 0);
 
 			[_underlyingStream writeBuffer: _buffer length: tmp];