PHP
Chilkat2 PHP
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.
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<?php
use Chilkat2\DtObj;
use Chilkat2\JsonObject;
use Chilkat2\Pdf;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
$pdf = new Pdf();
try {
$pdf->LoadFile('qa_data/pdf/sign_testing_1/helloSigned2.pdf');
} catch (\Chilkat2\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
$json = new JsonObject();
$json->EmitCompact = false;
$pdf->GetDss($json);
echo $json->Emit(), "\n";
// 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 = new DtObj();
$thisUpdate = new DtObj();
$nextUpdate = new DtObj();
$serial = '';
$validFrom = '';
$validTo = '';
$expired = false;
$subjectCN = '';
$subjectO = '';
$issuerCN = '';
$issuerO = '';
$keyType = '';
$keySize = '';
$der = '';
$subjectOU = '';
$subjectC = '';
$issuerOU = '';
$issuerC = '';
$responseStatus = 0;
$responseTypeOid = '';
$responseTypeName = '';
$responseResponderIdChoice = '';
$responseResponderKeyHash = '';
$j = 0;
$count_j = 0;
$hashOid = '';
$hashAlg = '';
$issuerNameHash = '';
$issuerKeyHash = '';
$serialNumber = '';
$status = 0;
$i = 0;
$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;
}