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(PHP ActiveX) Create XML Digital Signature using a ECDSA KeyDemonstrates how to create an XML digital signature using a ECDSA key. This example requires Chilkat v9.5.0.69 or greater.
<?php // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // The SOAP XML to be signed in this example contains the following: // <?xml version="1.0" encoding="UTF-8" standalone="no" ?> // <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"> // <SOAP-ENV:Header> // <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" SOAP-ENV:mustUnderstand="1"></wsse:Security> // </SOAP-ENV:Header> // <SOAP-ENV:Body xmlns:SOAP-SEC="http://schemas.xmlsoap.org/soap/security/2000-12" SOAP-SEC:id="Body"> // <z:FooBar xmlns:z="http://example.com" /> // </SOAP-ENV:Body> // </SOAP-ENV:Envelope> // // The above XML is available at https://www.chilkatsoft.com/exampleData/soapToSign.xml // Fetch the XML and then sign it.. $url = 'https://www.chilkatsoft.com/exampleData/soapToSign.xml'; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http') $http = new COM("Chilkat.Http"); // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbSoapXml = new COM("Chilkat.StringBuilder"); $success = $http->QuickGetSb($url,$sbSoapXml); if ($success != 1) { print $http->LastErrorText . "\n"; exit; } // This example uses an ECDSA private key for signing. // There are many ways to load an ECDSA private key using Chilkat. This example // will load from an unencrypted PEM file. // For your convenience, Chilkat put this sample ECDSA PEM here: https://www.chilkatsoft.com/exampleData/secp256r1-key.zip // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey') $ecKey = new COM("Chilkat.PrivateKey"); $success = $ecKey->LoadPemFile('qa_data/ecc/secp256r1-key.pem'); if ($success != 1) { print $ecKey->LastErrorText . "\n"; exit; } // To create the XML digital signature (i.e. embed the signature within // the SOAP XML), we specify what is desired, and then call the method to // create the XML signature. // // For example, the application must provide the following: // - Where to put the signature. // - What to sign. // - The algorithms to be used. // - The key to be used for signing. // // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.XmlDSigGen') $xmlSigGen = new COM("Chilkat.XmlDSigGen"); // In this example, the Signature will be placed within the wsse:Security element. // To specify the location, set the SigLocation property to the XML path to this element, // using vertical bar characters to separate tags. $xmlSigGen->SigLocation = 'SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security'; // An XML digital signature contains one or more references. A given reference // can be a same-document reference (to an XML fragment), or an external reference. // This example will add a single same-document reference. We'll add a reference to the XML fragment // at SOAP-ENV:Body, which is indicated by providing the value of the "Id" attribute (where "Id" is case // insensitive). For each same-document reference, we must also indicate the hash algorithm and XML canonicalization // algorithm to be used. For this example we'll choose SHA-256 and Exclusive XML Canonicalization. $xmlSigGen->AddSameDocRef('Body','sha256','EXCL_C14N','',''); // Let's provide the ECDSA key to be used for signing: $xmlSigGen->SetPrivateKey($ecKey); // We're leaving the following properties at their default values: // // - SigNamespacePrefix (default is "ds") // - SignedInfoCanonAlg (default is EXCL_C14N) // - SignedInfoDigestMethod (default is sha256) // - KeyInfoType (default is "KeyValue", where the ECDSA public key is included in the Signature) // Note: Each Reference specifies its own algorithms for XML canonicalization and hashing. // The SignedInfo part also has specified hash and canonicalization algorithms, which may be different // than the algorithms used in the References. // In this example, we use Exclusive XML Canonicalization and SHA-256 throughout. // Finally, we're going to set one property that's optional, but commonly used. // It's the SignedInfoPrefixList. In this case, we're using Exclusive Canonicalization, and the signature // will be placed in a location within the XML document where namespace prefixes are used in the ancestors. // Specifically, the "wsse" and "SOAP-ENV" namespace prefixes are used. $xmlSigGen->SignedInfoPrefixList = 'wsse SOAP-ENV'; // OK, everything's specified, so let's create the XML digital signature: // This in-place signs the XML. If successful, sbSoapXml will contain the // XML with the digital signature at the specified location. $success = $xmlSigGen->CreateXmlDSigSb($sbSoapXml); if ($success != 1) { print $xmlSigGen->LastErrorText . "\n"; exit; } // Examine the signed SOAP XML: print $sbSoapXml->getAsString() . "\n"; // This is the signed SOAP XML. // Chilkat emits the Signature in compact form on a single line. Whitespace in XML signatures // matters. Chilkat's opinion is that writing the Signature without whitespace minimizes the chance // for problems with whatever software might be verifying the signature. // <?xml version="1.0" encoding="UTF-8" standalone="no" ?> // <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"> // <SOAP-ENV:Header> // <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" SOAP-ENV:mustUnderstand="1"><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#"><InclusiveNamespaces xmlns="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="wsse SOAP-ENV"/></ds:CanonicalizationMethod><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256"/><ds:Reference URI="#Body"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>OwgHPZNfDkXnZsjpfzXqAcT3RV3HzmTsEy2bP44FJ0M=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>jmPSGgtirHSjjcs/o0NIDwwvy4aFBCEosSN+XP5NLVuGpRYnS2EM7mItiw6TKmESAoJYV23ZN4pZ9BFRKSvZqw==</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:Signature></wsse:Security> // </SOAP-ENV:Header> // <SOAP-ENV:Body xmlns:SOAP-SEC="http://schemas.xmlsoap.org/soap/security/2000-12" SOAP-SEC:id="Body"> // <z:FooBar xmlns:z="http://example.com" /> // </SOAP-ENV:Body> // </SOAP-ENV:Envelope> // The above signed XML contains the ECDSA public key in the ECKeyValue fragment (within the ds:KeyInfo). // The signature can easily be verified like this: // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.XmlDSig') $verifier = new COM("Chilkat.XmlDSig"); // First load the XML containing the signature(s) to be verified. $success = $verifier->LoadSignatureSb($sbSoapXml); if ($success != 1) { print $verifier->LastErrorText . "\n"; exit; } $bVerified = $verifier->VerifySignature(1); if ($bVerified != 1) { print $verifier->LastErrorText . "\n"; } print 'Signature verified = ' . $bVerified . "\n"; ?> |
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