OpenSSL - OpenSSL "pkey -pubout" - Extract RSA Public Key

OpenSSL "pkey -pubout" - Extract RSA Public Key

Q

How to extract the public key from an RSA key file using OpenSSL "pkey" command?

✍: FYIcenter.com

A

If you want to extract the public key out from an RSA key file (private key an public key), you can use the OpenSSL "pkey -pubout" command as shown below:

C:\Users\fyicenter>\local\openssl\openssl.exe

OpenSSL> pkey -in my_rsa.key -pubout -out my_rsa_pub.key
OpenSSL> exit

C:\Users\fyicenter>type my_rsa_pub.key
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDAExMAY742YWBAnv+3NTAI+cUR
lQQsszJtWO+tz2wryoe0XbD3x0tm5tByOjcZ7Hbp7QlaURf2Xmk3aN02UCOQGPG8
G4uIcK+2vCcIdiTCwL2DujkxYg5u5gAtgQCTrNBqJiGnGDEoNJaxAvR/PkqFM8D2
vvoat6ixisha/631UQIDAQAB
-----END PUBLIC KEY-----

Options used in this command are:

"-in my_rsa.key" - Read the RSA key file from: C:\Users\fyicenter\my_rsa.key
"-pubout" - Extract the public key out of the RSA key file
"-out my_rsa_pub.key" - Save the public key in a file with no password protection.

⇒ OpenSSL "pkey -pubin" - View RSA Public Key

⇐ OpenSSL "pkey -text" - Print RSA Key in Text

⇑ OpenSSL "genpkey" Command for RSA Keys

⇑⇑ OpenSSL Tutorials

2018-01-16, 634👍, 0💬

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How to generate a new RSA key pair with a shorter key size using OpenSSL "genpkey" command? If you need a new RSA key pair with a shorter key size for testing purpose, you can use the OpenSSL "genpkey -pkeyopt rsa_keygen_bits:nnn" command. The "-pkeyopt rsa_keygen_bits:nnn" option specifies the size... 2018-01-13, 978👍, 0💬

OpenSSL "pkey -text" - Print RSA Key in Text
How to print private key contents in text format using OpenSSL "pkey" command? If you want to see contents of a private key in text format, you can use the OpenSSL "pkey -text" command as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL> pkey -in my_rsa.key -text -noo... 2018-01-16, 753👍, 0💬

OpenSSL "pkey -pubin" - View RSA Public Key
How to view contents of an RSA public key file using OpenSSL "pkey" command? If you want to view contents of an RSA public key stored in a file, you can use the OpenSSL "pkey -pubin" command as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL> pkey -pubin -in my_rsa_p... 2018-01-13, 729👍, 0💬

OpenSSL "pkey -pubout" - Extract RSA Public Key
How to extract the public key from an RSA key file using OpenSSL "pkey" command? If you want to extract the public key out from an RSA key file (private key an public key), you can use the OpenSSL "pkey -pubout" command as shown below: C:\Users\fyicenter>\loc al\openssl\openssl.exeOpenSSL&... 2018-01-16, 635👍, 0💬

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