How do I determine the expiration date of a p12 certificate?

梦里梦外; 2022-05-13 05:50 226阅读 0赞

First you will need to translate the pkcs12 certificate into a PEM certificate.
The PEM certificate is only needed temporarily and can later be removed.

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$ openssl pkcs12 -
in
certificate.p12 -out tempcrt.pem


Enter Import Password:


MAC verified OK


Enter PEM pass phrase:


Verifying - Enter PEM pass phrase:

Now, we use thetempcrt.pemthat we generated to determine the expiration date. The first method, which only displays the expiration date can be retrieved like this:

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$ openssl x509 -
in
tempcrt.pem -noout -enddate


notAfter=Jan 3 23:19:24 2009 GMT

The second method which includes a lot more detail about the certificate below, I’ve only included the details relevant to the creation and expiration dates.

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$ openssl x509 -
in
tempcrt.pem -noout -text



[ … snip … ]



Validity



Not Before: Jan 3 23:19:24 2008 GMT



Not After : Jan 3 23:19:24 2009 GMT



[ … snip … ]

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