如何从 PEM 编码证书中确定 SSL 证书到期日期? [英] How to determine SSL cert expiration date from a PEM encoded certificate?

问题描述

如果我在 Mac 或 Linux 中有实际文件和 Bash shell，我如何查询证书文件何时到期?不是网站，而是证书文件本身，假设我有 csr、key、pem 和链文件.

If I have the actual file and a Bash shell in Mac or Linux, how can I query the cert file for when it will expire? Not a web site, but actually the certificate file itself, assuming I have the csr, key, pem and chain files.

推荐答案

With openssl:

openssl x509 -enddate -noout -in file.pem

输出在表单上:

notAfter=Nov  3 22:23:50 2014 GMT

另请参阅 MikeW 的回答，了解如何轻松检查证书是否已过期，或者它是否会在特定时间段，无需解析上述日期.

Also see MikeW's answer for how to easily check whether the certificate has expired or not, or whether it will within a certain time period, without having to parse the date above.

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