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JAVA-SPIFFE Helper

The JAVA-SPIFFE Helper is a simple utility for fetching X.509 SVID certificates from the SPIFFE Workload API, and storing the Private Key and the chain of certificates in a Java KeyStore in disk, and the trusted bundles (CAs) in a separated TrustStore in disk.

The Helper automatically gets the SVID updates and stores them in the KeyStore and TrustStore.

Usage

On Linux:

java -jar java-spiffe-helper-0.7.0-linux-x86_64.jar -c helper.conf

On Mac OS:

java -jar java-spiffe-helper-0.7.0-osx-x86_64.jar -c helper.conf

Either -c or --config should be used to pass the path to the config file.

(The jar can be downloaded from Github releases)

Config file

keyStorePath = /tmp/keystore.p12
keyStorePass = example123
keyPass = pass123

trustStorePath = /tmp/truststore.p12
trustStorePass = otherpass123

keyStoreType = pkcs12

keyAlias = spiffe

spiffeSocketPath = unix:/tmp/agent.sock

Configuration Properties

Configuration Description Default value
keyStorePath Path to the Java KeyStore File for storing the Private Key and chain of certs none
keyStorePass Password to protect the Java KeyStore File none
keyPass Password to protect the Private Key entry in the KeyStore none
trustStorePath Path to the Java TrustStore File for storing the trusted bundles none
trustStorePass Password to protect the Java TrustStore File none
keyStoreType Java KeyStore Type. (pkcs12 and jks are supported). Case insensitive. pkcs12
keyAlias Alias for the Private Key entry spiffe
spiffeSocketPath Path the Workload API Read from the system variable: SPIFFE_ENDPOINT_SOCKET

KeyStore and TrustStore must be in separate files. If keyStorePath and trustStorePath points to the same file, an error is shown . If the store files do not exist, they are created.

The default and recommended KeyStore Type is PKCS12. The same type is used for both KeyStore and TrustStore.

It is strongly recommended to set restrictive file permissions for KeyStore file, since it stores a private key:

chmod 600 keystore_file_name

Make sure the process running the JAVA-SPIFFE Helper has write permission on the KeyStores files.

Debug

To check that the certs are being stored in the KeyStore:

keytool -list -v -keystore keystore.path -storepass example123

The output should be a Private Key Entry:

Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 1 entry

Alias name: spiffe
Creation date: Jun 2, 2020
Entry type: PrivateKeyEntry

Owner: O=SPIFFE, C=US
Issuer: O=SPIFFE, C=US
...

In the case of the TrustStore, it should display a trustedCertEntry:

Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 1 entry

Alias name: example.org.0
Creation date: Jun 2, 2020
Entry type: trustedCertEntry

Owner: O=SPIFFE, C=US
Issuer: O=SPIFFE, C=US
...

The aliases for the trusted certs are generated using the Trust Domain of the SPIFFE ID in the SAN URI, and adding a correlative number suffix.