Terminal.app経由で次のように入力します:
openssl x509 -noout -text -in ~/Desktop/yourcertificate.crt
最後のパラメーターは証明書ファイルのパスです(必要に応じてドラッグアンドドロップできます)
私たちに与えます:
Certificate:
Data:
Version: 3 (0x2)
Serial Number: 27 (0x1b)
Signature Algorithm: sha1WithRSAEncryption
Issuer: C=US, O=Apple Inc., OU=Apple Certification Authority, CN=Apple Root CA
Validity
Not Before: May 26 19:16:09 2010 GMT
Not After : Jul 26 19:16:09 2017 GMT
Subject: C=US, O=Apple Inc., OU=Apple Certification Authority, CN=Apple Application Integration Certification Authority
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
RSA Public Key: (2048 bit)
......