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(Delphi DLL) Create XML Signature using Java KeyStore (.jks)

Demonstrates how to create an XML digital signature using a certificate and private key from a Java KeyStore (.jks)

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, XmlDSigGen, JavaKeyStore, StringBuilder, CertChain, Cert, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
xml: HCkXml;
jks: HCkJavaKeyStore;
password: PWideChar;
success: Boolean;
chain: HCkCertChain;
cert: HCkCert;
gen: HCkXmlDSigGen;
bUsePrivateKey: Boolean;
sbXml: HCkStringBuilder;

begin
// 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>
// 

// Build the XML to sign.
// Use this online tool to generate the code from sample XML: 
// Generate Code to Create XML

xml := CkXml_Create();
CkXml_putTag(xml,'SOAP-ENV:Envelope');
CkXml_AddAttribute(xml,'xmlns:SOAP-ENV','http://schemas.xmlsoap.org/soap/envelope/');
CkXml_UpdateAttrAt(xml,'SOAP-ENV:Header|wsse:Security',True,'xmlns:wsse','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd');
CkXml_UpdateAttrAt(xml,'SOAP-ENV:Header|wsse:Security',True,'SOAP-ENV:mustUnderstand','1');
CkXml_UpdateAttrAt(xml,'SOAP-ENV:Body',True,'xmlns:SOAP-SEC','http://schemas.xmlsoap.org/soap/security/2000-12');
CkXml_UpdateAttrAt(xml,'SOAP-ENV:Body',True,'SOAP-SEC:id','Body');
CkXml_UpdateAttrAt(xml,'SOAP-ENV:Body|z:FooBar',True,'xmlns:z','http://example.com');

// Load a JavaKeyStore file containing the certificate + private key.
jks := CkJavaKeyStore_Create();
password := 'secret';
success := CkJavaKeyStore_LoadFile(jks,password,'qa_data/jks/test_secret.jks');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkJavaKeyStore__lastErrorText(jks));
    Exit;
  end;

// Make sure we have a private key.
if (CkJavaKeyStore_getNumPrivateKeys(jks) < 1) then
  begin
    Memo1.Lines.Add('No private key available.');
    Exit;
  end;

// -------------------------------------------------------------------------
// Get the certificate chain associated with the 1st (and probably only) private key in the JKS.
chain := CkJavaKeyStore_GetCertChain(jks,0);
if (CkJavaKeyStore_getLastMethodSuccess(jks) <> True) then
  begin
    Memo1.Lines.Add(CkJavaKeyStore__lastErrorText(jks));
    Exit;
  end;

cert := CkCertChain_GetCert(chain,0);
if (CkCertChain_getLastMethodSuccess(chain) <> True) then
  begin
    Memo1.Lines.Add(CkCertChain__lastErrorText(chain));
    CkCertChain_Dispose(chain);
    Exit;
  end;
CkCertChain_Dispose(chain);

// Verify again that this cert has a private key.
if (CkCert_HasPrivateKey(cert) <> True) then
  begin
    Memo1.Lines.Add('Certificate has no associated private key.');
    CkCert_Dispose(cert);
    Exit;
  end;

// Prepare for signing...
// Use this online tool to generate the following code from an already-signed XML sample: 
// Generate Code to Create an XML Signature
gen := CkXmlDSigGen_Create();

// Indicate where the Signature will be inserted.
CkXmlDSigGen_putSigLocation(gen,'SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security');

// Add a reference to the fragment of the XML to be signed.
CkXmlDSigGen_AddSameDocRef(gen,'Body','sha1','EXCL_C14N','','');

// (You can read about the SignedInfoPrefixList in the online reference documentation.  It's optional..)
CkXmlDSigGen_putSignedInfoPrefixList(gen,'wsse SOAP-ENV');

// Provide the private key for signing via the certificate, and indicate that
// we want the base64 of the certificate embedded in the KeyInfo.
CkXmlDSigGen_putKeyInfoType(gen,'X509Data');
CkXmlDSigGen_putX509Type(gen,'Certificate');

// Note: Because our certificate was loaded from a JKS which also contained the private key,
// Chilkat automatically knows and has the private key associated with the certificate.
// We set bUsePrivateKey to tell the SetX509Cert method to automatically use the private key
// associated with the certificate for signing.
bUsePrivateKey := True;
success := CkXmlDSigGen_SetX509Cert(gen,cert,bUsePrivateKey);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkXmlDSigGen__lastErrorText(gen));
    CkCert_Dispose(cert);
    Exit;
  end;
CkCert_Dispose(cert);

// Everything's specified.  Now create and insert the Signature
sbXml := CkStringBuilder_Create();
CkXml_GetXmlSb(xml,sbXml);
success := CkXmlDSigGen_CreateXmlDSigSb(gen,sbXml);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkXmlDSigGen__lastErrorText(gen));
    Exit;
  end;

// Examine the XML with the digital signature inserted
Memo1.Lines.Add(CkStringBuilder__getAsString(sbXml));

CkXml_Dispose(xml);
CkJavaKeyStore_Dispose(jks);
CkXmlDSigGen_Dispose(gen);
CkStringBuilder_Dispose(sbXml);

end;

 

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