Spyderserve Web Development
To extract a separate crt and key from a pfx a few openssl commands need to be used.
First, extract an encrypted key file from the pfx:
openssl pkcs12 -in [yourfile.pfx] -nocerts -out [keyfile-encrypted.key]
Then, extract the crt file from the pfx:
openssl pkcs12 -in [yourfile.pfx] -clcerts -nokeys -out [certificate.crt]
Finally, decrypt the encrypted key file:
openssl rsa -in [keyfile-encrypted.key] -out [keyfile-decrypted.key]
That’s it.
Source: http://www.markbrilman.nl/2011/08/howto-convert-a-pfx-to-a-seperate-key-crt-file/