How to Import PEM Certificates into a Java Key Store?

Importing PEM Certificates into Java Key Store

When connecting to SSL servers that require authentication, you may encounter situations where only a PEM file is available instead of a JKS file. To establish an SSL connection using Apache MINA, a JKS file is required. This article outlines the process of converting a PEM file into a JKS file for use with Java applications.

Conversion Steps

1. Convert PEM to DER: Start by converting the PEM-encoded certificate into DER format using the following command:

openssl x509 -outform der -in certificate.pem -out certificate.der

2. Import DER into Key Store: Next, import the DER-formatted certificate into a Java key store using the keytool command:

keytool -import -alias your-alias -keystore cacerts -file certificate.der

Replace your-alias with an appropriate alias name for the certificate. cacerts is the default name of the Java key store, but you can also specify a custom file if needed.

This process will create a JKS file with the imported PEM certificate, allowing you to use it for SSL authentication in Java applications.

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