(Xojo Plugin) Change Password for Java KeyStore File

Demonstrates how to load a Java keystore, change the password, and save using the new password. If the Java keystore contains only trusted root certificates, then it's simply a matter of loading the JKS with the existing password, and then saving with a new password. If the JKS contains private key entries, then each private key entry must be re-keyed using the new password by calling the ChangePassword method.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim jks As New Chilkat.JavaKeyStore

Dim oldJksPassword As String
oldJksPassword = "existingPassword"
Dim newJksPassword As String
newJksPassword = "newPassword"
Dim jksPath As String
jksPath = "/someDir/keyStore.jks"

// Load the Java keystore from a file.
Dim success As Boolean
success = jks.LoadFile(oldJksPassword,jksPath)
If (success <> True) Then
    System.DebugLog(jks.LastErrorText)
    Return
End If

// If the JKS contains private key entries, then each
// must be re-keyed with the new password by calling ChangePassword.
Dim numPrivateKeys As Int32
numPrivateKeys = jks.NumPrivateKeys

Dim i As Int32
i = 0
While i < numPrivateKeys

    success = jks.ChangePassword(i,oldJksPassword,newJksPassword)
    If (success <> True) Then
        System.DebugLog(jks.LastErrorText)
        Return
    End If

    i = i + 1
Wend

// Write the JKS using the new password for the JKS file's keyed digest.
success = jks.ToFile(newJksPassword,jksPath)
If (success <> True) Then
    System.DebugLog(jks.LastErrorText)
    Return
End If

System.DebugLog("Updated the password for the Java keystore file.")