(Visual Basic 6.0) Load Java KeyStore and Access Contents

Loads a Java keystore file and iterates over the contents. A Java keystore (.jks) file can contain one or more trusted root certificate entries and/or one or more private key entries. Each private key entry includes an associated certificate chain.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim success As Long
success = 0

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

Dim jks As New ChilkatJavaKeyStore

' Load the Java keystore from a file.  The JKS file password is used
' to verify the keyed digest that is found at the very end of the keystore.
' It verifies there has been no tampering with the file.
success = jks.LoadFile("jksFilePassword","/someDir/keyStore.jks")
If (success = 0) Then
    Debug.Print jks.LastErrorText
    Exit Sub
End If

' Find out how many of each type of entry:
Dim numTrustedCerts As Long
numTrustedCerts = jks.NumTrustedCerts
Dim numPrivateKeys As Long
numPrivateKeys = jks.NumPrivateKeys

Dim cert As New ChilkatCert
Dim alias As String

' For each trusted certificate, access it by getting
' it as a cert object.  Also get the alias associated with the certificate.
Debug.Print "Trusted Certs:"
Dim i As Long
i = 0
Do While i < numTrustedCerts
    success = jks.TrustedCertAt(i,cert)
    Debug.Print jks.GetTrustedCertAlias(i) & ": " & cert.SubjectDN
    i = i + 1
Loop

Dim privKey As New PrivateKey
Dim certChain As New ChilkatCertChain

' For each private key entry, get the private key and
' the associated certificate chain.
' Each private key is password protected.  Usually it is the same
' password as used for the keyed digest of the entire JKS.  
' However, this does not have to be.  The password is passed
' here to handle the possibility of each private key requiring
' a different password.
Debug.Print "Private Keys:"
i = 0
Do While i < numPrivateKeys
    success = jks.PrivateKeyAt("jksFilePassword",i,privKey)
    Debug.Print jks.GetPrivateKeyAlias(i)
    success = jks.CertChainAt(i,certChain)

    ' The 1st certificate in the chain is the one associated with the private key.
    success = certChain.CertAt(0,cert)
    Debug.Print cert.SubjectDN

    i = i + 1
Loop