![]() |
Chilkat HOME Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi DLL Go Java Node.js Objective-C PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Delphi ActiveX) Create Enveloping XML Digital SignatureThis example creates an enveloping digital signature. Note: This example requires Chilkat v11.0.0 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var success: Integer; http: TChilkatHttp; zipFile: TChilkatBinData; keyUrl: WideString; zip: TChilkatZip; entry: TChilkatZipEntry; ecKey: TPrivateKey; gen: TChilkatXmlDSigGen; sbContent: TChilkatStringBuilder; sbXml: TChilkatStringBuilder; begin success := 0; // 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 := TChilkatHttp.Create(Self); zipFile := TChilkatBinData.Create(Self); keyUrl := 'https://www.chilkatsoft.com/exampleData/secp256r1-key.zip'; success := http.QuickGetBd(keyUrl,zipFile.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; zip := TChilkatZip.Create(Self); success := zip.OpenBd(zipFile.ControlInterface); entry := TChilkatZipEntry.Create(Self); success := zip.EntryMatching('*.pem',entry.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(zip.LastErrorText); Exit; end; ecKey := TPrivateKey.Create(Self); success := ecKey.LoadPem(entry.UnzipToString(0,'utf-8')); if (success <> 1) then begin Memo1.Lines.Add(ecKey.LastErrorText); Exit; end; // ---------------------------------------------------------------------------- gen := TChilkatXmlDSigGen.Create(Self); // Provide the ECDSA key to the XML Digital Signature generator gen.SetPrivateKey(ecKey.ControlInterface); // Add an enveloped reference to the content to be signed. sbContent := TChilkatStringBuilder.Create(Self); sbContent.Append('This is the content that is signed.'); gen.AddEnvelopedRef('abc123',sbContent.ControlInterface,'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 := TChilkatStringBuilder.Create(Self); success := gen.CreateXmlDSigSb(sbXml.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(gen.LastErrorText); Exit; end; // Examine the enveloped signature, where the data is contained within the XML Signature Memo1.Lines.Add(sbXml.GetAsString()); // 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> // end; |
© 2000-2025 Chilkat Software, Inc. All Rights Reserved.