x.509 Certificate Questions

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C#

SQL

Hi,

I'm developing an application where I need to store information from the x.509 certificate into a SQL database. Where I'm stuck is I can't find the length of some of the data so I don't know how to define my table. I know I could use vardata(max), but I rather code something reasonable. The lengths I'm looking for are Serial Number, Issuer, Subject, Issuer Alternate Name, Subject Alternate Name.

Also, I need to make a unique key and I was thinking about using the Issuer+Serial number? Would that be unique enough?

Thanks,
Glenn