OpenSSL::X509::Certificate

Implementation of an X.509 certificate as specified in RFC 5280. Provides access to a certificate's attributes and allows certificates to be read from a string, but also supports the creation of new certificates from scratch.

Reading a certificate from a file

Certificate is capable of handling DER-encoded certificates and certificates encoded in OpenSSL's PEM format.

raw = File.read "cert.cer" # DER- or PEM-encoded
certificate = OpenSSL::X509::Certificate.new raw

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