Delphi DLL Requires Chilkat v9.5.0.96+

Sign PDF in the Cloud using AWS CloudHSM

See more Signing in the Cloud Examples

Demonstrates how to sign a PDF using AWS CloudHSM. The signing of the hash happens on a hardware token in AWS CloudHSM. Everything else involving the updating the PDF to add the signature happens locally within Chilkat. Delphi DLL

var
success: Boolean;
pkcs11: HCkPkcs11;
pin: PWideChar;
userType: Integer;
cert: HCkCert;
pdf: HCkPdf;
json: HCkJsonObject;
i: Integer;

begin
success := False;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

pkcs11 := CkPkcs11_Create();

//  Provide the path to the AWS CloudHSM PKCS11 driver.
//  This example runs on Windows, so we'll provide the CloudHSM DLL.
//  If your code runs on Linux, the CloudHSM driver might be at /opt/cloudhsm/lib/libcloudhsm_pkcs11.so
CkPkcs11_putSharedLibPath(pkcs11,'C:\Program Files\Amazon\CloudHSM\lib\cloudhsm_pkcs11.dll');

//  Your PIN should be a string containing your crypto user's login and password, with a colon char delimiting.
//  See https://docs.aws.amazon.com/cloudhsm/latest/userguide/pkcs11-pin.html
pin := 'user:password';
userType := 1;

//  Establish a PKCS logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
success := CkPkcs11_QuickSession(pkcs11,userType,pin);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPkcs11__lastErrorText(pkcs11));
    Exit;
  end;

cert := CkCert_Create();
success := CkCert_LoadFromFile(cert,'qa_data/certs/myCert.cer');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

//  Tell the certificate to link with the PKCS11 session.
//  The cert's private key should be installed on the CloudHSM.
//  If there are multiple private keys on the CloudHSM, then Chilkat will automatically
//  locate and use the private key corresponding to the certificate.
success := CkCert_LinkPkcs11(cert,pkcs11);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

//  --------------------------------------------------------------------------
//  At this point, we have the cert to be used for signing.
//  Our PDF signing code is the same as for a cert obtained from any other source..

pdf := CkPdf_Create();

//  Load a PDF to be signed.
success := CkPdf_LoadFile(pdf,'qa_data/pdf/hello.pdf');
if (success = False) then
  begin
    Memo1.Lines.Add(CkPdf__lastErrorText(pdf));
    success := CkPkcs11_CloseSession(pkcs11);
    Exit;
  end;

json := CkJsonObject_Create();

CkJsonObject_UpdateInt(json,'page',1);
CkJsonObject_UpdateString(json,'appearance.y','top');
CkJsonObject_UpdateString(json,'appearance.x','left');
CkJsonObject_UpdateString(json,'appearance.fontScale','10.0');
CkJsonObject_UpdateString(json,'signingAlgorithm','pss');
CkJsonObject_UpdateString(json,'hashAlgorithm','sha256');

i := 0;
CkJsonObject_putI(json,i);
CkJsonObject_UpdateString(json,'appearance.text[i]','Digitaly signed by: Xyz Widgets, Inc.');
i := i + 1;
CkJsonObject_putI(json,i);
CkJsonObject_UpdateString(json,'appearance.text[i]','current_dt');
i := i + 1;
CkJsonObject_putI(json,i);
CkJsonObject_UpdateString(json,'appearance.text[i]','blah blah blah');

//  The certificate is internally linked to the Pkcs11 object, which is currently in an authenticated session.
success := CkPdf_SetSigningCert(pdf,cert);

success := CkPdf_SignPdf(pdf,json,'qa_output/out.pdf');
if (success = False) then
  begin
    Memo1.Lines.Add(CkPdf__lastErrorText(pdf));
    success := CkPkcs11_CloseSession(pkcs11);
    Exit;
  end;

//  --------------------------------------------------------------------------

//  Revert to an unauthenticated session by calling Logout.
success := CkPkcs11_Logout(pkcs11);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPkcs11__lastErrorText(pkcs11));
    success := CkPkcs11_CloseSession(pkcs11);
    Exit;
  end;

//  When finished, close the session.
//  It is important to close the session (memory leaks will occur if the session is not properly closed).
success := CkPkcs11_CloseSession(pkcs11);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPkcs11__lastErrorText(pkcs11));
    Exit;
  end;

Memo1.Lines.Add('Success.');

CkPkcs11_Dispose(pkcs11);
CkCert_Dispose(cert);
CkPdf_Dispose(pdf);
CkJsonObject_Dispose(json);