How to extract public key from certificate? | MyThinkPond

How to extract public key from certificate?

Recently I had to extract the public key from a certificate. Each time I do this I end up looking up the man pages for openssl and so I thought I’d blog it for myself and for others to use when needed.

$ openssl x509 -inform pem -in certificate.pem -pubkey -noout > publickey.pem

Enjoy

Venkatt Guhesan avatar
About Venkatt Guhesan
Enterprise Software Architect currently working at DataDirect Networks developing a highly scalable monitoring solution called DDN Insight. My passions include all things Open Source including Linux (CentOS, Red Hat, Gentoo, Open Stack, Docker & Ubuntu), embedded ARM processors and microcontrollers (Arduino, UDOO, Cubieboard, BeagleBoard, OnionIO, TI's Zigbee). Coming from an Electrical and Computer Engineering background, working in developing and designing enterprise - distributed, highly scalable software requires a unique set of software skills with a good understanding of the hardware. This makes his work challenging and interesting. In his free time, he spends his time with his family and two children. He also enjoys researching on topics including - world ancient history and yoga. Visit the 'About' section for more details.
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