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(PHP Extension) Create Enveloping XML Digital SignatureThis example creates an enveloping digital signature.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Let's use the ECDSA private key at https://www.chilkatsoft.com/exampleData/secp256r1-key.zip // for signing. $http = new CkHttp(); $zipFile = new CkBinData(); $keyUrl = 'https://www.chilkatsoft.com/exampleData/secp256r1-key.zip'; $success = $http->QuickGetBd($keyUrl,$zipFile); if ($success != true) { print $http->lastErrorText() . "\n"; exit; } $zip = new CkZip(); $success = $zip->OpenBd($zipFile); // zipEntry is a CkZipEntry $zipEntry = $zip->FirstMatchingEntry('*.pem'); $ecKey = new CkPrivateKey(); $success = $ecKey->LoadPem($zipEntry->unzipToString(0,'utf-8')); if ($success != true) { print $ecKey->lastErrorText() . "\n"; exit; } // ---------------------------------------------------------------------------- $gen = new CkXmlDSigGen(); // Provide the ECDSA key to the XML Digital Signature generator $gen->SetPrivateKey($ecKey); // Add an enveloped reference to the content to be signed. $sbContent = new CkStringBuilder(); $sbContent->Append('This is the content that is signed.'); $gen->AddEnvelopedRef('abc123',$sbContent,'sha256','C14N',''); // Generate the XML digital signature. // Notice that in other examples, the sbXml passed to CreateXmlDSigSb // already contains XML, and the XML signature is inserted at the location // specified by the SigLocation property. In this case, both SigLocation // and sbXml are empty. The result is that sbXml will contain just the Signature. $sbXml = new CkStringBuilder(); $success = $gen->CreateXmlDSigSb($sbXml); if ($success != true) { print $gen->lastErrorText() . "\n"; exit; } // Examine the enveloped signature, where the data is contained within the XML Signature print $sbXml->getAsString() . "\n"; // The Signature returned is compact and in a single line, like this: // <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256"/><ds:Reference URI="#abc123"><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>tEVrbXXjeTXjF3tIojul4/sgeEGN49E1dxr/GMs8GNE=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>/pILUshwrzgdGc4bPgp85TDfbUiM9pn8EIPNRVWKuoVEtPsv4XRthUrv9aDDvajmyl2okLwTakANgtaxO1ULMw==</ds:SignatureValue><ds:KeyInfo><ds:KeyValue><ds:ECKeyValue xmlns="http://www.w3.org/2009/xmldsig11#"><ds:NamedCurve URI="urn:oid:1.2.840.10045.3.1.7" /><ds:PublicKey>BOVKaiLPKEDChhkA64UEBOXTv/VFHnhrUPN+bXqCvEl7rroAYpH5tKzbiGTtMSlp4JO9Pxg44zeX7EoWDvOrpD0=</ds:PublicKey></ds:ECKeyValue></ds:KeyValue></ds:KeyInfo><ds:Object Id="abc123">This is the content that is signed.</ds:Object></ds:Signature> // XML pretty-printed, the signature is as follows, but pretty-printing introductes whitespace that breaks the signature.. // <?xml version="1.0" encoding="utf-8" ?> // <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"> // <ds:SignedInfo> // <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" /> // <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256" /> // <ds:Reference URI="#abc123"> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" /> // <ds:DigestValue>tEVrbXXjeTXjF3tIojul4/sgeEGN49E1dxr/GMs8GNE=</ds:DigestValue> // </ds:Reference> // </ds:SignedInfo> // <ds:SignatureValue>/pILUshwrzgdGc4bPgp85TDfbUiM9pn8EIPNRVWKuoVEtPsv4XRthUrv9aDDvajmyl2okLwTakANgtaxO1ULMw==</ds:SignatureValue> // <ds:KeyInfo> // <ds:KeyValue> // <ds:ECKeyValue xmlns="http://www.w3.org/2009/xmldsig11#"> // <ds:NamedCurve URI="urn:oid:1.2.840.10045.3.1.7" /> // <ds:PublicKey>BOVKaiLPKEDChhkA64UEBOXTv/VFHnhrUPN+bXqCvEl7rroAYpH5tKzbiGTtMSlp4JO9Pxg44zeX7EoWDvOrpD0=</ds:PublicKey> // </ds:ECKeyValue> // </ds:KeyValue> // </ds:KeyInfo> // <ds:Object Id="abc123">This is the content that is signed.</ds:Object> // </ds:Signature> // ?> |
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