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 squanderingti.me
Certificates: A Primer - Squanderingtime/Chris Chandler
| | www.agwa.name
Checking if a Certificate is Revoked: How Hard Can It Be?
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| | blog.bityard.net
Filling in the Gaps: HTTPS/TLS Certificates - Das Bityard
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| | (Disclaimer: No AIs were used in the writing of this article. My intelligence has been frequently questioned, but has thus far never been accused...
| | carrickbartle.com
Carrick Bartle
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| | sgued.fr
Is this certificate DER or PEM encoded It turns out, both at the same time
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| X509 certificate can be encoded either as DER or PEM. DER encoding is an efficient binary format, while PEM encoding is a wrapper around the Base 64 DER encoding of the certificate. Usually, when dealing with a specific certificate, you know beforehand whether it's encoded as DER or PEM. For example, in the opennssl CLI, you can give it the -inform parameter, which accepts either DER or PEM. However, what if don't know the encoding of the certificate, can you figure it out on the fly?