ctrl+d interrupt is now handled without exception.

# sss_obfuscate -d default
Enter password: 
Re-enter password: 
Passwords do not match. Try again
Enter password: 
Re-enter password: 
Passwords do not match. Try again
Enter password: 
Unexpected end-of-file. Password change aborted


Verified in version:
# rpm -qi sssd-tools | head
Name        : sssd-tools                   Relocations: (not relocatable)
Version     : 1.5.1                             Vendor: Red Hat, Inc.
Release     : 34.el5                        Build Date: Tue 03 May 2011 10:46:09 PM IST
Install Date: Thu 05 May 2011 08:10:42 AM IST      Build Host: x86-004.build.bos.redhat.com
Group       : Applications/System           Source RPM: sssd-1.5.1-34.el5.src.rpm
Size        : 1706639                          License: GPLv3+
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://fedorahosted.org/sssd/
Summary     : Userspace tools for use with the SSSD

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0975.html