PHP ActiveX

Load a Private Key from XML Text

Demonstrates the Chilkat PrivateKey.LoadXml method, which loads a private key from XML text. The only argument is the XML string. Supported roots include RSAKeyValue, DSAKeyValue, ECCKeyValue, and Ed25519KeyValue.

Background: XML key representations such as RSAKeyValue come from the .NET/XML-DSIG world, where keys are exchanged as XML elements. This loads that form — the inverse of GetXml — which is handy for interoperating with .NET code or systems built around XML signatures. It is a plaintext format, so protect the XML like any unencrypted key material.

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<?php

$success = 0;

//  Demonstrates the PrivateKey.LoadXml method, which loads a private key from XML text.  The only
//  argument is the XML string.  Supported roots include RSAKeyValue, DSAKeyValue, ECCKeyValue,
//  and Ed25519KeyValue.

$privKey = new COM("Chilkat.PrivateKey");

//  The XML text of a private key (for example as produced by GetXml).
$xmlText = '<RSAKeyValue><Modulus>...</Modulus><Exponent>AQAB</Exponent>...</RSAKeyValue>';

$success = $privKey->LoadXml($xmlText);
if ($success == 0) {
    print $privKey->LastErrorText . "\n";
    exit;
}

print 'Loaded a ' . $privKey->KeyType . ' private key.' . "\n";

?>