June 2003
Intermediate to advanced
336 pages
8h 54m
English
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4.5. Decoding an SSL Certificate
Problem
You want to view information about a given SSL certificate, stored in a PEM file.
Solution
$ openssl x509 -text -in filename
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
d0:1e:40:90:00:00:27:4b:00:00:00:01:00:00:00:04
Signature Algorithm: sha1WithRSAEncryption
Issuer: C=US, ST=Utah, L=Salt Lake City, O=Xcert EZ by DST, CN=Xcert EZ by
DST/Email=ca@digsigtrust.com
Validity
Not Before: Jul 14 16:14:18 1999 GMT
Not After : Jul 11 16:14:18 2009 GMT
Subject: C=US, ST=Utah, L=Salt Lake City, O=Xcert EZ by DST, CN=Xcert EZ by
DST/Email=ca@digsigtrust.com
...Discussion
This is a quick way to learn who issued a certificate, its begin and end dates, and other pertinent details.
See Also
openssl(1).
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.