(Ruby) 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.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

jks = Chilkat::CkJavaKeyStore.new()

# 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 != true)
    print jks.lastErrorText() + "\n";
    exit
end

# Find out how many of each type of entry:
numTrustedCerts = jks.get_NumTrustedCerts()
numPrivateKeys = jks.get_NumPrivateKeys()

# For each trusted certificate, access it by getting
# it as a cert object.  Also get the alias associated with the certificate.
print "Trusted Certs:" + "\n";
i = 0
while i < numTrustedCerts
    # cert is a CkCert
    cert = jks.GetTrustedCert(i)
    print jks.getTrustedCertAlias(i) + ": " + cert.subjectDN() + "\n";

    i = i + 1
end

# 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.
print "Private Keys:" + "\n";
i = 0
while i < numPrivateKeys
    # privKey is a CkPrivateKey
    privKey = jks.GetPrivateKey("jksFilePassword",i)
    print jks.getPrivateKeyAlias(i) + "\n";
    # certChain is a CkCertChain
    certChain = jks.GetCertChain(i)

    # The 1st certificate in the chain is the one associated with the private key.
    # cert is a CkCert
    cert = certChain.GetCert(0)
    print cert.subjectDN() + "\n";

    i = i + 1
end