Delphi DLL
Delphi DLL
Get PDF DSS (Document Security Store)
See more PDF Signatures Examples
This example demonstrates how to extract the information from a PDF's DSS (Document Security Store), if a /DSS exists. (Just because a PDF is signed does not mean a /DSS will exists. In fact, the /DSS is typically created at the point of adding the 2nd or greater signature because the /DSS contains LTV (long term validation) information about the previous signature at the time of adding an additional signature.)Note: This example requires Chilkat v9.5.0.85 or greater.
Chilkat Delphi DLL Downloads
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, DtObj, Pdf, JsonObject;
...
procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
pdf: HCkPdf;
json: HCkJsonObject;
responseDateTime: HCkDtObj;
thisUpdate: HCkDtObj;
nextUpdate: HCkDtObj;
serial: PWideChar;
validFrom: PWideChar;
validTo: PWideChar;
expired: Boolean;
subjectCN: PWideChar;
subjectO: PWideChar;
issuerCN: PWideChar;
issuerO: PWideChar;
keyType: PWideChar;
keySize: PWideChar;
der: PWideChar;
subjectOU: PWideChar;
subjectC: PWideChar;
issuerOU: PWideChar;
issuerC: PWideChar;
responseStatus: Integer;
responseTypeOid: PWideChar;
responseTypeName: PWideChar;
responseResponderIdChoice: PWideChar;
responseResponderKeyHash: PWideChar;
j: Integer;
count_j: Integer;
hashOid: PWideChar;
hashAlg: PWideChar;
issuerNameHash: PWideChar;
issuerKeyHash: PWideChar;
serialNumber: PWideChar;
status: Integer;
i: Integer;
count_i: Integer;
begin
success := False;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
pdf := CkPdf_Create();
success := CkPdf_LoadFile(pdf,'qa_data/pdf/sign_testing_1/helloSigned2.pdf');
if (success = False) then
begin
Memo1.Lines.Add(CkPdf__lastErrorText(pdf));
Exit;
end;
json := CkJsonObject_Create();
CkJsonObject_putEmitCompact(json,False);
success := CkPdf_GetDss(pdf,json);
Memo1.Lines.Add(CkJsonObject__emit(json));
// The document security store contains certificates, OCSP responses, and CRLs.
// The following JSON is a sample of what the /DSS can contain.
// Unfortunately, our sample contains /Certs and /OCSPs, but no /CRLs.
// It's no problem because whatever JSON you get back, you can use the
// following online tool to generate code to parse.
// Generate Parsing Code from JSON
// The code generated by the online tool for this JSON is shown below..
// {
// "/VRI": {
// "/EC5BB34CC1F8A0C5FE674427E16E313A08C80808": {}
// },
// "/Certs": [
// {
// "serial": "02",
// "validFrom": "2011-08-07T19:00:00-05:00",
// "validTo": "2021-08-10T23:59:59-05:00",
// "expired": false,
// "subject": {
// "CN": "XYZ Corporation",
// "O": "XYZ"
// },
// "issuer": {
// "CN": "XYZ Corporation",
// "O": "XYZ"
// },
// "keyType": "RSA",
// "keySize": "2048",
// "der": "MIIDz...Q4Zt"
// },
// {
// "serial": "01",
// "validFrom": "2011-08-07T19:00:00-05:00",
// "validTo": "2021-08-10T23:59:59-05:00",
// "expired": false,
// "subject": {
// "CN": "XYZ Corporation",
// "O": "XYZ"
// },
// "issuer": {
// "CN": "XYZ Corporation",
// "O": "XYZ"
// },
// "keyType": "RSA",
// "keySize": "2048",
// "der": "MIID...jXYFc="
// },
// {
// "serial": "0AA125D6D6321B7E41E405DA3697C215",
// "validFrom": "2016-01-07T06:00:00-06:00",
// "validTo": "2031-01-07T12:00:00-06:00",
// "expired": false,
// "subject": {
// "CN": "DigiCert SHA2 Assured ID Timestamping CA",
// "OU": "www.digicert.com",
// "O": "DigiCert Inc",
// "C": "US"
// },
// "issuer": {
// "CN": "DigiCert Assured ID Root CA",
// "OU": "www.digicert.com",
// "O": "DigiCert Inc",
// "C": "US"
// },
// "keyType": "RSA",
// "keySize": "2048",
// "der": "MIIF...OUg=="
// },
// {
// "serial": "04CD3F8568AE76C61BB0FE7160CCA76D",
// "validFrom": "2019-09-30T19:00:00-05:00",
// "validTo": "2030-10-17T00:00:00-05:00",
// "expired": false,
// "subject": {
// "CN": "TIMESTAMP-SHA256-2019-10-15",
// "O": "DigiCert, Inc.",
// "C": "US"
// },
// "issuer": {
// "CN": "DigiCert SHA2 Assured ID Timestamping CA",
// "OU": "www.digicert.com",
// "O": "DigiCert Inc",
// "C": "US"
// },
// "keyType": "RSA",
// "keySize": "2048",
// "der": "MIIG...MJtPc="
// },
// {
// "serial": "0CE7E0E517D846FE8FE560FC1BF03039",
// "validFrom": "2006-11-09T18:00:00-06:00",
// "validTo": "2031-11-10T00:00:00-06:00",
// "expired": false,
// "subject": {
// "CN": "DigiCert Assured ID Root CA",
// "OU": "www.digicert.com",
// "O": "DigiCert Inc",
// "C": "US"
// },
// "issuer": {
// "CN": "DigiCert Assured ID Root CA",
// "OU": "www.digicert.com",
// "O": "DigiCert Inc",
// "C": "US"
// },
// "keyType": "RSA",
// "keySize": "2048",
// "der": "MIIDt...FL6Lw8g=="
// },
// {
// "serial": "E4D34D01798BE686424AF7F6F0C3BF41",
// "validFrom": "2015-03-24T10:58:16-05:00",
// "validTo": "2039-12-31T23:59:59-06:00",
// "expired": false,
// "subject": {
// "CN": "www.xyz.com"
// },
// "issuer": {
// "CN": "www.xyz.com"
// },
// "keyType": "RSA",
// "keySize": "1024",
// "der": "MIIB9DCCAWG...UR10lz"
// }
// ],
// "/OCSPs": [
// {
// "responseStatus": 0,
// "responseTypeOid": "1.3.6.1.5.5.7.48.1.1",
// "responseTypeName": "ocspBasic",
// "response": {
// "responderIdChoice": "KeyHash",
// "responderKeyHash": "Reuir/SSy4IxLVGLp6chnfNtyA8=",
// "dateTime": "20201005173921Z",
// "cert": [
// {
// "hashOid": "1.3.14.3.2.26",
// "hashAlg": "SHA-1",
// "issuerNameHash": "98S+C0C1w0QzPT+uuU1uONr67FE=",
// "issuerKeyHash": "Reuir/SSy4IxLVGLp6chnfNtyA8=",
// "serialNumber": "0AA125D6D6321B7E41E405DA3697C215",
// "status": 0,
// "thisUpdate": "20201005173921Z",
// "nextUpdate": "20201012173921Z"
// }
// ]
// }
// },
// {
// "responseStatus": 0,
// "responseTypeOid": "1.3.6.1.5.5.7.48.1.1",
// "responseTypeName": "ocspBasic",
// "response": {
// "responderIdChoice": "KeyHash",
// "responderKeyHash": "9LbhIB3+Ka7S5GGlsqIlssgXNW4=",
// "dateTime": "20201006114501Z",
// "cert": [
// {
// "hashOid": "1.3.14.3.2.26",
// "hashAlg": "SHA-1",
// "issuerNameHash": "+YYA+KSr7NIxRSxCjUNQo25SyD0=",
// "issuerKeyHash": "9LbhIB3+Ka7S5GGlsqIlssgXNW4=",
// "serialNumber": "04CD3F8568AE76C61BB0FE7160CCA76D",
// "status": 0,
// "thisUpdate": "20201006114501Z",
// "nextUpdate": "20201013110001Z"
// }
// ]
// }
// }
// ]
// }
responseDateTime := CkDtObj_Create();
thisUpdate := CkDtObj_Create();
nextUpdate := CkDtObj_Create();
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'/Certs');
while i < count_i do
begin
CkJsonObject_putI(json,i);
serial := CkJsonObject__stringOf(json,'/Certs[i].serial');
validFrom := CkJsonObject__stringOf(json,'/Certs[i].validFrom');
validTo := CkJsonObject__stringOf(json,'/Certs[i].validTo');
expired := CkJsonObject_BoolOf(json,'/Certs[i].expired');
subjectCN := CkJsonObject__stringOf(json,'/Certs[i].subject.CN');
subjectO := CkJsonObject__stringOf(json,'/Certs[i].subject.O');
issuerCN := CkJsonObject__stringOf(json,'/Certs[i].issuer.CN');
issuerO := CkJsonObject__stringOf(json,'/Certs[i].issuer.O');
keyType := CkJsonObject__stringOf(json,'/Certs[i].keyType');
keySize := CkJsonObject__stringOf(json,'/Certs[i].keySize');
der := CkJsonObject__stringOf(json,'/Certs[i].der');
subjectOU := CkJsonObject__stringOf(json,'/Certs[i].subject.OU');
subjectC := CkJsonObject__stringOf(json,'/Certs[i].subject.C');
issuerOU := CkJsonObject__stringOf(json,'/Certs[i].issuer.OU');
issuerC := CkJsonObject__stringOf(json,'/Certs[i].issuer.C');
i := i + 1;
end;
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'/OCSPs');
while i < count_i do
begin
CkJsonObject_putI(json,i);
responseStatus := CkJsonObject_IntOf(json,'/OCSPs[i].responseStatus');
responseTypeOid := CkJsonObject__stringOf(json,'/OCSPs[i].responseTypeOid');
responseTypeName := CkJsonObject__stringOf(json,'/OCSPs[i].responseTypeName');
responseResponderIdChoice := CkJsonObject__stringOf(json,'/OCSPs[i].response.responderIdChoice');
responseResponderKeyHash := CkJsonObject__stringOf(json,'/OCSPs[i].response.responderKeyHash');
CkJsonObject_DtOf(json,'/OCSPs[i].response.dateTime',False,responseDateTime);
j := 0;
count_j := CkJsonObject_SizeOfArray(json,'/OCSPs[i].response.cert');
while j < count_j do
begin
CkJsonObject_putJ(json,j);
hashOid := CkJsonObject__stringOf(json,'/OCSPs[i].response.cert[j].hashOid');
hashAlg := CkJsonObject__stringOf(json,'/OCSPs[i].response.cert[j].hashAlg');
issuerNameHash := CkJsonObject__stringOf(json,'/OCSPs[i].response.cert[j].issuerNameHash');
issuerKeyHash := CkJsonObject__stringOf(json,'/OCSPs[i].response.cert[j].issuerKeyHash');
serialNumber := CkJsonObject__stringOf(json,'/OCSPs[i].response.cert[j].serialNumber');
status := CkJsonObject_IntOf(json,'/OCSPs[i].response.cert[j].status');
CkJsonObject_DtOf(json,'/OCSPs[i].response.cert[j].thisUpdate',False,thisUpdate);
CkJsonObject_DtOf(json,'/OCSPs[i].response.cert[j].nextUpdate',False,nextUpdate);
j := j + 1;
end;
i := i + 1;
end;
CkPdf_Dispose(pdf);
CkJsonObject_Dispose(json);
CkDtObj_Dispose(responseDateTime);
CkDtObj_Dispose(thisUpdate);
CkDtObj_Dispose(nextUpdate);
end;