Verify Java Signature

Demonstrates how to verify a digital signature produced by Java.
The Java code that produces a digital signature that can be verified with
this Chilkat example is found at: http://www.cknotes.com/?p=283

 Chilkat Perl Module Downloads for Windows, Linux, and MAC OS X

use chilkat();


$pubKey = new chilkat::CkPublicKey();

#  Load an RSA public key from an ASN.1 DER file
$success = $pubKey->LoadRsaDerFile("pubKey.der");

if ($success != 1) {
    print $pubKey->lastErrorText() . "\r\n";
    exit;
}

#  Get the public key in XML format:
$pkeyXml = $pubKey->getXml();

$rsa = new chilkat::CkRsa();

#  Any string argument automatically begins the 30-day trial.
$success = $rsa->UnlockComponent("30-day trial");
if ($success != 1) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

#  Import the public key into the RSA component:
$success = $rsa->ImportPublicKey($pkeyXml);
if ($success != 1) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

$rsa->put_EncodingMode("base64");

$strData = "The quick brown fox jumps over the lazy dog";

#  IMPORTANT:  This Base64 signature will have to be updated
#  with the digital signature produced by the Java code at:
#  http://www.cknotes.com/?p=283
$base64Sig = "VGV5A+bodHBpBwwJZdf17Bv+lkBTm/gteOf8iCgEEfNzBosZLaAB8X55BIZIkE2zKRXoMcJT+iCxsj+1hnlwJeKZ+Gya58lrHw6NWm2N0O/KyfnuEzADOM86X0xrkgdFT6SYpbZ9dWPC59NiHeEdVyjOXNJ3fBpUSQ5/5pvVWm0=";

#  Verify the signature produced by the Java code at:
#  http://www.cknotes.com/?p=283
#  The VerifyStringENC method hashes the input data and verifies
#  the hash against the signature.
$success = $rsa->VerifyStringENC($strData,"sha-1",$base64Sig);
#  Is the signature verified?
if ($success == 1) {
    print "Signature Verified!" . "\r\n";
}
else {
    print "Signature not verified!" . "\r\n";
}