PHP ActiveX

Export a Traditional Private Key as Encoded Text

Demonstrates the Chilkat PrivateKey.GetPkcs1ENC method, which exports the key as the traditional/preferred unencrypted DER and encodes the DER bytes as text. The only argument names the binary encoding, such as base64 or hex.

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.

Background: This is the encoded-text form of the traditional DER representation — the same bytes the traditional PEM wraps, but returned as a string in the encoding you choose. Use it when a legacy consumer needs the traditional key structure delivered as text rather than as a PEM file. The DER is unencrypted, so the result is sensitive.

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<?php

$success = 0;

//  Load a private key to export.
$privKey = new COM("Chilkat.PrivateKey");
$success = $privKey->LoadPemFile('qa_data/private.pem');
if ($success == 0) {
    print $privKey->LastErrorText . "\n";
    exit;
}

//  Export as the traditional/preferred unencrypted DER, then encode the DER bytes as text.  The
//  only argument names the binary encoding, such as "base64" or "hex".
$encoded = $privKey->getPkcs1ENC('base64');
if ($privKey->LastMethodSuccess == 0) {
    print $privKey->LastErrorText . "\n";
    exit;
}

print $encoded . "\n";

?>