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OpenSSL "x509 -pubkey" - Export Public Key"

Q

How to export the public key out from a certificate using OpenSSL "x509" command?

✍: FYIcenter.com

A

You can export the public key out from a certificate using OpenSSL "x509 -pubkey" command as shown below: 

C:\Users\fyicenter>\local\OpenSSL\openssl

OpenSSL> x509 -in twitter.crt -pubkey -noout > twitter_pub.key

OpenSSL> exit

C:\Users\fyicenter>type twitter_pub.key
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwgiY+mcABVW2C2EOGte1
isHMA748F/uU99n6TJ9GYJxqrX065TRaErCyC6rsluFYgS+tYKtHk2njhHVTwfkP
uUarnuqrGJiMaFQIUWVDGmGXJ1xeDxXpzRar3VFbdi/80xGZndKmPYcCdeYkluIE
PhSc+n64cUI3ALWwiuIzlYvaP/tjTTdi1RwC6jB+3A1T1dQLuKMQE20fiZQLapRE
ZymCrebVsFL8lVcG1tEiZoTTkioCx5RW31U/whPyfBZ4M6FT93eXXLeWBdVE9L/v
gyJdeuaP5KzfNJ62DwpT8BrbcTdpkvYUqRx1ZXJFJAk7LGrXuWml3N9tnGv8xqJb
MQIDAQAB
-----END PUBLIC KEY-----

 

⇒ OpenSSL "x509 -pubout" - Export Public Key"

⇐ OpenSSL "x509 -req" - Error "my_ca.srl: No error"

⇑ OpenSSL "x509" Command

⇑⇑ OpenSSL Tutorials

2016-10-17, 5003👍, 0💬

DH Keys DSA Keys EC Keys Firefox General Google Chrome IE (Internet Explorer) Intermediate CA Java VM JDK Keytool Microsoft CertUtil Mozilla CertUtil OpenSSL Other Portecle Publishers Revoked Certificates Root CA RSA Keys Tools Tutorial What Is Windows