Objective-C
Objective-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.
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#import <CkoPdf.h>
#import <CkoJsonObject.h>
#import <CkoDtObj.h>
#import <NSString.h>
BOOL success = NO;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
CkoPdf *pdf = [[CkoPdf alloc] init];
success = [pdf LoadFile: @"qa_data/pdf/sign_testing_1/helloSigned2.pdf"];
if (success == NO) {
NSLog(@"%@",pdf.LastErrorText);
return;
}
CkoJsonObject *json = [[CkoJsonObject alloc] init];
json.EmitCompact = NO;
success = [pdf GetDss: json];
NSLog(@"%@",[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"
// }
// ]
// }
// }
// ]
// }
CkoDtObj *responseDateTime = [[CkoDtObj alloc] init];
CkoDtObj *thisUpdate = [[CkoDtObj alloc] init];
CkoDtObj *nextUpdate = [[CkoDtObj alloc] init];
NSString *serial = 0;
NSString *validFrom = 0;
NSString *validTo = 0;
BOOL expired;
NSString *subjectCN = 0;
NSString *subjectO = 0;
NSString *issuerCN = 0;
NSString *issuerO = 0;
NSString *keyType = 0;
NSString *keySize = 0;
NSString *der = 0;
NSString *subjectOU = 0;
NSString *subjectC = 0;
NSString *issuerOU = 0;
NSString *issuerC = 0;
int responseStatus;
NSString *responseTypeOid = 0;
NSString *responseTypeName = 0;
NSString *responseResponderIdChoice = 0;
NSString *responseResponderKeyHash = 0;
int j;
int count_j;
NSString *hashOid = 0;
NSString *hashAlg = 0;
NSString *issuerNameHash = 0;
NSString *issuerKeyHash = 0;
NSString *serialNumber = 0;
int status;
int i = 0;
int count_i = [[json SizeOfArray: @"/Certs"] intValue];
while (i < count_i) {
json.I = [NSNumber numberWithInt: 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"] intValue];
while (i < count_i) {
json.I = [NSNumber numberWithInt: i];
responseStatus = [[json IntOf: @"/OCSPs[i].responseStatus"] intValue];
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" bLocal: NO dt: responseDateTime];
j = 0;
count_j = [[json SizeOfArray: @"/OCSPs[i].response.cert"] intValue];
while (j < count_j) {
json.J = [NSNumber numberWithInt: 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"] intValue];
[json DtOf: @"/OCSPs[i].response.cert[j].thisUpdate" bLocal: NO dt: thisUpdate];
[json DtOf: @"/OCSPs[i].response.cert[j].nextUpdate" bLocal: NO dt: nextUpdate];
j = j + 1;
}
i = i + 1;
}