(Perl) 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 Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux

use chilkat();

$success = 0;

# 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 == 0) {
    print $jks->lastErrorText() . "\r\n";
    exit;
}

# Find out how many of each type of entry:
$numTrustedCerts = $jks->get_NumTrustedCerts();
$numPrivateKeys = $jks->get_NumPrivateKeys();

$cert = chilkat::CkCert->new();

# For each trusted certificate, access it by getting
# it as a cert object.  Also get the alias associated with the certificate.
print "Trusted Certs:" . "\r\n";
$i = 0;
while ($i < $numTrustedCerts) {
    $success = $jks->TrustedCertAt($i,$cert);
    print $jks->getTrustedCertAlias($i) . ": " . $cert->subjectDN() . "\r\n";
    $i = $i + 1;
}

$privKey = chilkat::CkPrivateKey->new();
$certChain = chilkat::CkCertChain->new();

# 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:" . "\r\n";
$i = 0;
while ($i < $numPrivateKeys) {
    $jks->PrivateKeyAt("jksFilePassword",$i,$privKey);
    print $jks->getPrivateKeyAlias($i) . "\r\n";
    $jks->CertChainAt($i,$certChain);

    # The 1st certificate in the chain is the one associated with the private key.
    $certChain->CertAt(0,$cert);
    print $cert->subjectDN() . "\r\n";

    $i = $i + 1;
}