JavaMultipleMethod mismatch for Interface arguments

JavaMultipleMethod resolves to a wrong method signature in a case where matching should be done by the interfaces. Consider the following Cipher.init:

    Cipher = autoclass("javax.crypto.Cipher")
    SecretKeySpec = autoclass("javax.crypto.spec.SecretKeySpec")

    default_key = [0x00] * 16
    secret_key_spec = SecretKeySpec(default_key, "DESede")

    # The signature we want is (int, java.security.Key) [Key is interface]
    # the signature this resolves is (int, java.security.Certificate)
    # JavaException: Invalid instance of u'javax/crypto/spec/SecretKeySpec' passed for a u'java/security/cert/Certificate'
    cipher.init(Cipher.DECRYPT_MODE, secret_key_spec)

A (temporary) solution would be manually pull out the correct underlying call signature from JavaMultipleMethod object using the interface name in the signature. However is this possible? I did not find any examples doing this and my poking from console did not yield results.

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[kived]

As a workaround, does it work if you cast it? i.e. cipher.init(Cipher.DECRYPT_MODE, cast('java.security.Key', secret_key_spec))

[gbm001]

This is a) still broken and b) still works with the workaround (which ironically was exactly the same Java classes despite me not including them in the Google search…) Given that my Java is non-existent though, can’t help with this one 😦

Edit: unfortunately this doesn’t work for decryption; passing the argument cast as a java.security.Key leads to a JavaException that an RSA key is needed, while passing the argument cast as an RSA key gets you back to choosing the wrong method (expecting a Certificate). Is there a way to force access to the right method? It’s annoying that I can call the right method (with the wrong arguments); I just can’t get the right method (which I could then call with the right arguments)…