Configuration file specifying validity periods of CA certificates

[GoogleCodeExporter]

CA certificates may loose their validity before their "best before" date 
because of compromise, cease of operation, etc. To properly validate signatures 
using certificates issued by such CA we need to have file that can override the 
validity periods of CA certificates.

What steps will reproduce the problem?
1. Have document signed using certificate issued by DigiNotar
2. The document was timestamped by VeriSign before DigiNotar compromise

What is the expected output? What do you see instead?
Document should be considered valid. It isn't because DigiNotar can't be in 
trusted CAs.

Please provide any additional information below.

Related: issue 18 in practice, will be required for XAdES-A implementation.

Suggested file format: Trust Service List published by ETSI 
http://www.etsi.org/deliver/etsi_ts/102200_102299/102231/03.01.02_60/ts_102231v0
30102p.pdf

Original issue reported on code.google.com by hubert.k...@gmail.com on 25 Sep 2012 at 12:52