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====== Create a .pfx/.p12 certificate file using OpenSSL ======


The PKCS#12 or PFX format is a binary format for storing the server certificate, any intermediate certificates, and the private key into a single encryptable file. PFX files are usually found with the extensions .pfx and .p12. PFX files are typically used on Windows machines to import and export certificates and private keys.

==== Requirements: ====

  * The original private key used for the certificate
  * A PEM (.pem, .crt, .cer) or PKCS#7/P7B (.p7b, .p7c) File
  * OpenSSL

The commands below demonstrate examples of how to create a .pfx/.p12 file in the command line using OpenSSL.

===== PEM (.pem, .crt, .cer) to PFX =====

<code bash>
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile more.crt
</code>

Breaking down the command:

  * openssl – the command for executing OpenSSL
  * pkcs12 – the file utility for PKCS#12 files in OpenSSL
  * -export -out certificate.pfx – export and save the PFX file as certificate.pfx
  * -inkey privateKey.key – use the private key file privateKey.key as the private key to combine with the certificate.
  * -in certificate.crt – use certificate.crt as the certificate the private key will be combined with.
  * -certfile more.crt – This is optional, this is if you have any additional certificates you would like to include in the PFX file.
  *

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