You can load your .p12 file using the ClassLoader.getResourceAsStream(String)
method, load it to a KeyStore and them get the key from the KeyStore.
KeyStore keystore = KeyStore.getInstance("PKCS12");
keystore.load(this.getClass().getClassLoader().getResourceAsStream("keyFile.p12"), p12Password.toCharArray());
PrivateKey key = (PrivateKey)keystore.getKey(keyAlias, p12Password.toCharArray());
ClassLoader.getResourceAsStream(String)
loads resources from any location provided they're already on the classpath, there's no need to specify a path to the file.
keyAlias
is the name of the entry in your p12 file that corresponds to the private key. PKCS12 files can contain multiple entries, so you need some way to indicate which entry you want to access. The alias is how this is achieved.
If you're not sure what the alias for your private key is, you can use the keytool
utility from the command line to list the contents of your p12 file. This tool is included with all JRE and JDK installations.
keytool -list -keystore keyFile.p12 -storepass password -storetype PKCS12
Output
Keystore type: PKCS12
Keystore provider: SunJSSE
Your keystore contains 1 entry
yourKeyAlias, Sep 4, 2013, PrivateKeyEntry,
Certificate fingerprint (MD5): 48:A8:C4:12:8E:4A:8A:AD:58:81:26:90:E7:3D:C8:04