Create an Opaque Signature with a Separate Private Key

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Demonstrates the Chilkat Mime.ConvertToSignedPk method, which creates an opaque signature using a signer certificate and its separately supplied private key. The first argument is the Cert and the second is the PrivateKey.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

use chilkat();

$success = 0;

$mime = chilkat::CkMime->new();
$success = $mime->SetBodyFromPlainText("This message will be signed.");
if ($success == 0) {
    print $mime->lastErrorText() . "\r\n";
    exit;
}

#  Load the certificate and its private key separately.
$cert = chilkat::CkCert->new();
$success = $cert->LoadFromFile("qa_data/signer.cer");
if ($success == 0) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$privKey = chilkat::CkPrivateKey->new();
$success = $privKey->LoadPemFile("qa_data/signer_privkey.pem");
if ($success == 0) {
    print $privKey->lastErrorText() . "\r\n";
    exit;
}

#  Create an opaque signature when the certificate and private key are supplied separately.  The
#  1st argument is the signer certificate and the 2nd is its private key.
$success = $mime->ConvertToSignedPk($cert,$privKey);
if ($success == 0) {
    print $mime->lastErrorText() . "\r\n";
    exit;
}

$success = $mime->SaveMime("qa_output/signed_opaque.eml");
if ($success == 0) {
    print $mime->lastErrorText() . "\r\n";
    exit;
}

print "Message converted to an opaque signed message." . "\r\n";