(Lianja) Get the Certificate with Private Key from a Java KeyStore

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Load a Chilkat certificate object from a Java KeyStore.

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Most of the time a .jks contains one certificate with it's associated private key.
// (Similar to how a .pfx/.p12 usually contains a particular certificate with private key.)
// This example demonstrates how to get the certificate with private key such that it can be used
// by other Chilkat classes wherever a cert w/ private key is needed.
loJks = createobject("CkJavaKeyStore")
lcPassword = "secret"
llSuccess = loJks.LoadFile(lcPassword,"qa_data/jks/test_secret.jks")
if (llSuccess <> .T.) then
    ? loJks.LastErrorText
    release loJks
    return
endif

// Make sure we have a private key.
if (loJks.NumPrivateKeys < 1) then
    ? "No private key available."
    release loJks
    return
endif

// -------------------------------------------------------------------------
// Get the certificate chain associated with the 1st (and probably only) private key in the JKS.
loChain = loJks.GetCertChain(0)
if (loJks.LastMethodSuccess <> .T.) then
    ? loJks.LastErrorText
    release loJks
    return
endif

loCert = loChain.GetCert(0)
if (loChain.LastMethodSuccess <> .T.) then
    ? loChain.LastErrorText
    release loChain
    release loJks
    return
endif

release loChain

// Verify again that this cert has a private key.
if (loCert.HasPrivateKey() <> .T.) then
    ? "Certificate has no associated private key."
    release loCert
    release loJks
    return
endif

// We now have the cert object with it's associated private key, and it can be used in other Chilkat classes where needed.
// For example..

loCrypt = createobject("CkCrypt2")
llSuccess = loCrypt.SetSigningCert(loCert)
if (llSuccess = .F.) then
    ? loCrypt.LastErrorText
    release loJks
    release loCrypt
    return
endif

// ...
// ...

release loCert


release loJks
release loCrypt