.NET Core C#
.NET Core C#
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 .NET Core C# Downloads
bool success = false;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
Chilkat.Pdf pdf = new Chilkat.Pdf();
success = pdf.LoadFile("qa_data/pdf/sign_testing_1/helloSigned2.pdf");
if (success == false) {
Debug.WriteLine(pdf.LastErrorText);
return;
}
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;
success = pdf.GetDss(json);
Debug.WriteLine(json.Emit());
// 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"
// }
// ]
// }
// }
// ]
// }
Chilkat.DtObj responseDateTime = new Chilkat.DtObj();
Chilkat.DtObj thisUpdate = new Chilkat.DtObj();
Chilkat.DtObj nextUpdate = new Chilkat.DtObj();
string serial;
string validFrom;
string validTo;
bool expired;
string subjectCN;
string subjectO;
string issuerCN;
string issuerO;
string keyType;
string keySize;
string der;
string subjectOU;
string subjectC;
string issuerOU;
string issuerC;
int responseStatus;
string responseTypeOid;
string responseTypeName;
string responseResponderIdChoice;
string responseResponderKeyHash;
int j;
int count_j;
string hashOid;
string hashAlg;
string issuerNameHash;
string issuerKeyHash;
string serialNumber;
int status;
int i = 0;
int count_i = json.SizeOfArray("/Certs");
while (i < count_i) {
json.I = i;
serial = json.StringOf("/Certs[i].serial");
validFrom = json.StringOf("/Certs[i].validFrom");
validTo = json.StringOf("/Certs[i].validTo");
expired = json.BoolOf("/Certs[i].expired");
subjectCN = json.StringOf("/Certs[i].subject.CN");
subjectO = json.StringOf("/Certs[i].subject.O");
issuerCN = json.StringOf("/Certs[i].issuer.CN");
issuerO = json.StringOf("/Certs[i].issuer.O");
keyType = json.StringOf("/Certs[i].keyType");
keySize = json.StringOf("/Certs[i].keySize");
der = json.StringOf("/Certs[i].der");
subjectOU = json.StringOf("/Certs[i].subject.OU");
subjectC = json.StringOf("/Certs[i].subject.C");
issuerOU = json.StringOf("/Certs[i].issuer.OU");
issuerC = json.StringOf("/Certs[i].issuer.C");
i = i + 1;
}
i = 0;
count_i = json.SizeOfArray("/OCSPs");
while (i < count_i) {
json.I = i;
responseStatus = json.IntOf("/OCSPs[i].responseStatus");
responseTypeOid = json.StringOf("/OCSPs[i].responseTypeOid");
responseTypeName = json.StringOf("/OCSPs[i].responseTypeName");
responseResponderIdChoice = json.StringOf("/OCSPs[i].response.responderIdChoice");
responseResponderKeyHash = json.StringOf("/OCSPs[i].response.responderKeyHash");
json.DtOf("/OCSPs[i].response.dateTime",false,responseDateTime);
j = 0;
count_j = json.SizeOfArray("/OCSPs[i].response.cert");
while (j < count_j) {
json.J = j;
hashOid = json.StringOf("/OCSPs[i].response.cert[j].hashOid");
hashAlg = json.StringOf("/OCSPs[i].response.cert[j].hashAlg");
issuerNameHash = json.StringOf("/OCSPs[i].response.cert[j].issuerNameHash");
issuerKeyHash = json.StringOf("/OCSPs[i].response.cert[j].issuerKeyHash");
serialNumber = json.StringOf("/OCSPs[i].response.cert[j].serialNumber");
status = json.IntOf("/OCSPs[i].response.cert[j].status");
json.DtOf("/OCSPs[i].response.cert[j].thisUpdate",false,thisUpdate);
json.DtOf("/OCSPs[i].response.cert[j].nextUpdate",false,nextUpdate);
j = j + 1;
}
i = i + 1;
}