(PowerBuilder) Convert Java KeyStore to PKCS12 / PFX

Loads a Java keystore file and saves it as a PKCS12 / PFX. A Java keystore (JKS) can contain two types of entries: (1) trusted root certificates or (2) private keys + cert chains. Usually a JKS will contain all entries of one type or another (and thus a particular JKS serves one purpose or another; meaning that a JKS containing trusted roots is used as a source for verifying pre-trusted roots, and a JKS containing private keys (and cert chains) is used as a secure, encrypted store for private keys).

A PKCS12 / PFX typically contains one or more private keys, along with each private key's certificate chain. Therefore, it typically makes sense to only write the private key entries to a PKCS12 (and the associated certificate chains). If a JKS contains trusted root certificates, it makes more sense to conver it to a PEM file (such as the CA cert bundle in PEM format from mozilla.org).

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

integer li_rc
oleobject loo_Jks
string ls_JksPassword
integer li_Success
oleobject loo_Pkcs12
integer li_NumPrivateKeys
integer i
oleobject loo_PrivKey
oleobject loo_CertChain
string ls_Pkcs12Password

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

loo_Jks = create oleobject
// Use "Chilkat_9_5_0.JavaKeyStore" for versions of Chilkat < 10.0.0
li_rc = loo_Jks.ConnectToNewObject("Chilkat.JavaKeyStore")
if li_rc < 0 then
    destroy loo_Jks
    MessageBox("Error","Connecting to COM object failed")
    return
end if

ls_JksPassword = "myJksPassword"

// 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 that the keystore has not been modified.
li_Success = loo_Jks.LoadFile(ls_JksPassword,"/someDir/keyStore.jks")
if li_Success <> 1 then
    Write-Debug loo_Jks.LastErrorText
    destroy loo_Jks
    return
end if

// To convert, we'll access the private key entries
// from the JKS, add each to the PKCS12, and then save the PKCS12.
loo_Pkcs12 = create oleobject
// Use "Chilkat_9_5_0.Pfx" for versions of Chilkat < 10.0.0
li_rc = loo_Pkcs12.ConnectToNewObject("Chilkat.Pfx")

li_NumPrivateKeys = loo_Jks.NumPrivateKeys

// 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.
i = 0
do while i < li_NumPrivateKeys
    loo_PrivKey = loo_Jks.GetPrivateKey(ls_JksPassword,i)
    Write-Debug loo_Jks.GetPrivateKeyAlias(i)
    loo_CertChain = loo_Jks.GetCertChain(i)

    // Add the private key and it's associated certificate chain to the PKCS12.
    li_Success = loo_Pkcs12.AddPrivateKey(loo_PrivKey,loo_CertChain)
    if li_Success <> 1 then
        Write-Debug loo_Pkcs12.LastErrorText
        destroy loo_CertChain
        destroy loo_PrivKey
        destroy loo_Jks
        destroy loo_Pkcs12
        return
    end if

    destroy loo_CertChain
    destroy loo_PrivKey
    i = i + 1
loop

// Save the PKCS12 / PFX to a file.
// The password can be the same as the JKS password, or something new.
// (With the PKCS12 format, there is a single password for the entire contents
// of the file.  With the JKS format, there is flexibility in allowing each private key
// to have it's own password.)
ls_Pkcs12Password = "myNewPassword"
li_Success = loo_Pkcs12.ToFile(ls_Pkcs12Password,"/pkcs12_files/myPfx.p12")
if li_Success <> 1 then
    Write-Debug loo_Pkcs12.LastErrorText
else
    Write-Debug "Successfully saved to PKCS12 format."
end if



destroy loo_Jks
destroy loo_Pkcs12