(Swift 3,4,5...) 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 Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let jks = CkoJavaKeyStore()!

    var oldJksPassword: String? = "existingPassword"
    var newJksPassword: String? = "newPassword"
    var jksPath: String? = "/someDir/keyStore.jks"

    // Load the Java keystore from a file.
    var success: Bool = jks.loadFile(oldJksPassword, path: jksPath)
    if success != true {
        print("\(jks.lastErrorText!)")
        return
    }

    // If the JKS contains private key entries, then each
    // must be re-keyed with the new password by calling ChangePassword.
    var numPrivateKeys: Int = jks.numPrivateKeys.intValue

    var i: Int = 0
    while i < numPrivateKeys {

        success = jks.changePassword(i, oldPassword: oldJksPassword, newPassword: newJksPassword)
        if success != true {
            print("\(jks.lastErrorText!)")
            return
        }

        i = i + 1
    }

    // Write the JKS using the new password for the JKS file's keyed digest.
    success = jks.toFile(newJksPassword, path: jksPath)
    if success != true {
        print("\(jks.lastErrorText!)")
        return
    }

    print("Updated the password for the Java keystore file.")

}