JavaScript

RFC3161 Timestamp Client - Fetch from Timestamp Authority (TSA) and Verify

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Sends an RFC 3161 timestamp request to a TSA (Timestamp Authority) server and validates the timestamp token response. JavaScript

var success = false;

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

// First sha-256 hash the data that is to be timestamped.
// In this example, the data is the string "Hello World"

var crypt = new CkCrypt2();
crypt.HashAlgorithm = "sha256";
crypt.EncodingMode = "base64";
var base64Hash = crypt.HashStringENC("Hello World");

var http = new CkHttp();

var requestToken = new CkBinData();
var optionalPolicyOid = "";
var addNonce = false;
var requestTsaCert = true;

// Create a time-stamp request token
success = http.CreateTimestampRequest("sha256",base64Hash,optionalPolicyOid,addNonce,requestTsaCert,requestToken);
if (success == false) {
    console.log(http.LastErrorText);
    return;
}

// Send the time-stamp request token to the TSA.
// This is the equivalent of the following CURL command:
// curl -H "Content-Type: application/timestamp-query" --data-binary '@file.tsq' https://freetsa.org/tsr > file.tsr
var tsaUrl = "https://freetsa.org/tsr";
// Another timestamp server you could try is: http://timestamp.digicert.com
tsaUrl = "http://timestamp.digicert.com";
var resp = new CkHttpResponse();
success = http.HttpBd("POST",tsaUrl,requestToken,"application/timestamp-query",resp);
if (success == false) {
    console.log(http.LastErrorText);
    return;
}

// Get the timestamp reply from the HTTP response object.
var timestampReply = new CkBinData();
resp.GetBodyBd(timestampReply);

// Show the base64 encoded timestamp reply.
console.log(timestampReply.GetEncoded("base64"));

// Let's verify the timestamp reply against the TSA's cert, which we've previously downloaded.
// See https://freetsa.org/index_en.php
var tsaCert = new CkCert();
success = tsaCert.LoadFromFile("qa_data/certs/freetsa.org.cer");
if (success == false) {
    console.log(tsaCert.LastErrorText);
    return;
}

// The VerifyTimestampReply method will return one of the following values:
// -1:  The timestampReply does not contain a valid timestamp reply.
// -2: The  timestampReply is a valid timestamp reply, but failed verification using the public key of the tsaCert.
// 0:  Granted and verified.
// 1: Granted and verified, with mods (see RFC 3161)
// 2: Rejected.
// 3: Waiting.
// 4: Revocation Warning
// 5: Revocation Notification
var pkiStatus = http.VerifyTimestampReply(timestampReply,tsaCert);
if (pkiStatus < 0) {
    console.log(http.LastErrorText);
    return;
}

console.log("pkiStatus = " + pkiStatus);

var json = new CkJsonObject();
http.GetLastJsonData(json);

json.EmitCompact = false;
console.log(json.Emit());

// The JSON looks like the following.

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "timestampReply": {
//     "pkiStatus": {
//       "value": 0,
//       "meaning": "granted"
//     }
//   },
//   "pkcs7": {
//     "verify": {
//       "digestAlgorithms": [
//         "sha256"
//       ],
//       "signerInfo": [
//         {
//           "cert": {
//             "serialNumber": "04CD3F8568AE76C61BB0FE7160CCA76D",
//             "issuerCN": "DigiCert SHA2 Assured ID Timestamping CA",
//             "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//             "digestAlgName": "SHA256"
//           },
//           "contentType": "1.2.840.113549.1.9.16.1.4",
//           "signingTime": "200405023019Z",
//           "messageDigest": "f14zOsdnN9vyyV3HjjBiLzNDi1PF28hAFMODxNkNRZs=",
//           "signingAlgOid": "1.2.840.113549.1.1.1",
//           "signingAlgName": "RSA-PKCSV-1_5",
//           "authAttr": {
//             "1.2.840.113549.1.9.3": {
//               "name": "contentType",
//               "oid": "1.2.840.113549.1.9.16.1.4"
//             },
//             "1.2.840.113549.1.9.5": {
//               "name": "signingTime",
//               "utctime": "200405023019Z"
//             },
//             "1.2.840.113549.1.9.16.2.12": {
//               "name": "signingCertificate",
//               "der": "MBowGDAWBBQDJb1QXtqWMC3CL0+gHkwovig0xQ=="
//             },
//             "1.2.840.113549.1.9.4": {
//               "name": "messageDigest",
//               "digest": "f14zOsdnN9vyyV3HjjBiLzNDi1PF28hAFMODxNkNRZs="
//             }
//           }
//         }
//       ]
//     }
//   }
// }

var signingTime = new CkDtObj();
var authAttrSigningTimeUtctime = new CkDtObj();
var strVal;
var certSerialNumber;
var certIssuerCN;
var certDigestAlgOid;
var certDigestAlgName;
var contentType;
var messageDigest;
var signingAlgOid;
var signingAlgName;
var authAttrContentTypeName;
var authAttrContentTypeOid;
var authAttrSigningTimeName;
var authAttrSigningCertificateName;
var authAttrSigningCertificateDer;
var authAttrMessageDigestName;
var authAttrMessageDigestDigest;

var timestampReplyPkiStatusValue = json.IntOf("timestampReply.pkiStatus.value");
var timestampReplyPkiStatusMeaning = json.StringOf("timestampReply.pkiStatus.meaning");
var i = 0;
var count_i = json.SizeOfArray("pkcs7.verify.digestAlgorithms");
while (i < count_i) {
    json.I = i;
    strVal = json.StringOf("pkcs7.verify.digestAlgorithms[i]");
    i = i+1;
}

i = 0;
count_i = json.SizeOfArray("pkcs7.verify.signerInfo");
while (i < count_i) {
    json.I = i;
    certSerialNumber = json.StringOf("pkcs7.verify.signerInfo[i].cert.serialNumber");
    certIssuerCN = json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerCN");
    certDigestAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid");
    certDigestAlgName = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName");
    contentType = json.StringOf("pkcs7.verify.signerInfo[i].contentType");
    json.DtOf("pkcs7.verify.signerInfo[i].signingTime",false,signingTime);
    messageDigest = json.StringOf("pkcs7.verify.signerInfo[i].messageDigest");
    signingAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].signingAlgOid");
    signingAlgName = json.StringOf("pkcs7.verify.signerInfo[i].signingAlgName");
    authAttrContentTypeName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name");
    authAttrContentTypeOid = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid");
    authAttrSigningTimeName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name");
    json.DtOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime",false,authAttrSigningTimeUtctime);
    authAttrSigningCertificateName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.12\".name");
    authAttrSigningCertificateDer = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.12\".der");
    authAttrMessageDigestName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name");
    authAttrMessageDigestDigest = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest");
    i = i+1;
}