Generate .key and .crt File from JKS for Apache Server

apache-2.4keytoolopensslsslssl-certificate

I have the mycert.jks file only.
Now i need to extract and generate .key and .crt file and use it in apache httpd server.

SSLCertificateFile /usr/local/apache2/conf/ssl.crt/server.crt 
SSLCertificateKeyFile /usr/local/apache2/conf/ssl.key/server.key

Can anybody list the all steps to get this done. I searched but there is no concrete example to understand, mixed and matched steps.

Please suggest!

[EDIT]
Getting error after following steps from below answer.

8/‎21/‎2015 9:07 PM] Sohan Bafna: 
    [Fri Aug 21 15:32:03.008511 2015] [ssl:emerg] [pid 14:tid 140151694997376] AH02562: Failed to configure certificate 0.0.0.0:4545:0 (with chain), check /home/certs/smp_c
    ert_key_store.crt
    [Fri Aug 21 15:32:03.008913 2015] [ssl:emerg] [pid 14:tid 140151694997376] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: TRUSTED
     CERTIFICATE) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
    [Fri Aug 21 15:32:03.008959 2015] [ssl:emerg] [pid 14:tid 140151694997376] SSL Library Error: error:140DC009:SSL routines:SSL_CTX_use_certificate_chain_file:PEM lib

Best Answer

.jks is a keystore, which is a Java thing

use keytool binary from Java.

export the .crt:

keytool -export -alias mydomain -file mydomain.der -keystore mycert.jks

convert the cert to PEM:

openssl x509 -inform der -in mydomain.der -out certificate.pem

export the key:

keytool -importkeystore -srckeystore mycert.jks -destkeystore keystore.p12 -deststoretype PKCS12

convert PKCS12 key to unencrypted PEM:

openssl pkcs12 -in keystore.p12  -nodes -nocerts -out mydomain.key

credits:

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