int EncryptInputProc(ClientData clientData, char *buf, int toRead, int *errorCodePtr) {
    EncryptState *statePtr = (EncryptState *) clientData;
    Tcl_Channel parent;
    int out_len;
    Tcl_Size read;
    *errorCodePtr = 0;
    char *in_buf;
    
    dprintf("Called");

    /* Abort if nothing to process */
    if (toRead <= 0 || statePtr->self == (Tcl_Channel) NULL) {
	return 0;
    }