Android Mobile App development - Export Private Key from .jks file

Android_Mobile_App_development_Export_PrivateKey_from_jks_file.txt

Export the Private Key: First, you need to convert the JKS keystore to a PKCS12 format:





   keytool -importkeystore -srckeystore [keystore_path] -destkeystore [output_file.p12] -deststoretype PKCS12 -srcstorepass [password] -deststorepass [password]



Replace [keystore_path] with the path to your JKS file, [output_file.p12] with the desired output file name, and [password] with the keystore password.

Extract the Private Key: Use OpenSSL to extract the private key from the PKCS12 file:





   openssl pkcs12 -in [output_file.p12] -nocerts -out [private_key.pem] -nodes



Replace [output_file.p12] with the name of the PKCS12 file and [private_key.pem] with the desired output file name for the private key.

Convert to PEM Format: If needed, convert the private key to the required PEM format:





   openssl pkcs8 -topk8 -inform PEM -outform PEM -in [private_key.pem] -out [formatted_private_key.pem] -nocrypt



Replace [private_key.pem] with the path to your extracted private key and [formatted_private_key.pem] with the desired output file name.

This process should give you the private key in the format:





-----BEGIN PRIVATE KEY-----
YourPrivateKeyHere
-----END PRIVATE KEY-----