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(PHP ActiveX) Decrypt a govtalk.gov.uk SOAP GovTalkMessageDemonstrates how to decrypt the content contained in the XML of a GovTalkMessage SOAP response.
<?php // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // The GovTalkMessage response looks something like this: // <?xml version="1.0" encoding="utf-8"?> // <GovTalkMessage xmlns="http://www.govtalk.gov.uk/CM/envelope"> // <EnvelopeVersion>3.1</EnvelopeVersion> // <Header> // <MessageDetails> // <Class>CSSZ_DZDPN</Class> // <Qualifier>request</Qualifier> // <Function>submit</Function> // <TransactionID /> // <AuditID /> // <CorrelationID>aaaaa</CorrelationID> // <ResponseEndPoint PollInterval="0" /> // <Transformation>XML</Transformation> // <GatewayTest /> // <GatewayTimestamp /> // </MessageDetails> // <SenderDetails> // <IDAuthentication> // <SenderID /> // <Authentication> // <Method>clear</Method> // <Role /> // <Value /> // </Authentication> // </IDAuthentication> // <X509Certificate /> // <EmailAddress>somebody@example.com</EmailAddress> // </SenderDetails> // </Header> // <GovTalkDetails> // <Keys> // <Key Type="vars">9999999999</Key> // </Keys> // <GatewayAdditions> // <Source>VREP</Source> // </GatewayAdditions> // </GovTalkDetails> // <Body> // <Message xmlns="http://www.cssz.cz/XMLSchema/envelope" version="1.2" eType="DZDPN20"> // <Header> // <Signature xmlns:dt="urn:schemas-microsoft-com:datatypes" dt:dt="bin.base64">MIIJ0A ... UMw= // </Signature> // <Vendor productName="some product name" version="2019" /> // </Header> // <Body xmlns:dt="urn:schemas-microsoft-com:datatypes" encrypted="yes" contentEncoding="gzip" dt:dt="bin.base64">MIIF2w ... N2vW</Body> // </Message> // </Body> // </GovTalkMessage> // We want to get the content of the Body and decrypt it. // First, let's get the content of the Body XML element, which is a base64 string starting with MIIF2w... // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml') $xml = new COM("Chilkat.Xml"); $success = $xml->LoadXmlFile('qa_data/xml/govTalkMessageResponse.xml'); if ($success == 0) { print $xml->LastErrorText . "\n"; exit; } $Body = $xml->getChildContent('Body|Message|Body'); print $Body . "\n"; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert') $cert = new COM("Chilkat.Cert"); $success = $cert->LoadPfxFile('qa_data/pfx/govTalkMessage_aaa.pfx','aaa'); if ($success == 0) { print $cert->LastErrorText . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2') $crypt = new COM("Chilkat.Crypt2"); $crypt->CryptAlgorithm = 'pki'; $success = $crypt->SetDecryptCert($cert); if ($success == 0) { print $crypt->LastErrorText . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData') $bd = new COM("Chilkat.BinData"); // Append the bytes to bd. $success = $bd->AppendEncoded($Body,'base64'); // Decrypt in-place. $success = $crypt->DecryptBd($bd); if ($success == 0) { print $crypt->LastErrorText . "\n"; exit; } // Save the decrypted data to a file. $success = $bd->WriteFile('qa_output/out.dat'); // If the decrypted data is non-text (binary) then we can examine it in an encoding, such as hex: print 'Decrypted bytes as hex: ' . $bd->getEncoded('hex') . "\n"; ?> |
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