Delphi ActiveX Requires Chilkat v11.0.0+
Delphi ActiveX
RFC3161 Timestamp Client - Fetch from Timestamp Authority (TSA) and Verify
See more HTTP Examples
Sends an RFC 3161 timestamp request to a TSA (Timestamp Authority) server and validates the timestamp token response.Chilkat Delphi ActiveX Downloads
var
success: Integer;
crypt: TChilkatCrypt2;
base64Hash: WideString;
http: TChilkatHttp;
requestToken: TChilkatBinData;
optionalPolicyOid: WideString;
addNonce: Integer;
requestTsaCert: Integer;
tsaUrl: WideString;
resp: TChilkatHttpResponse;
timestampReply: TChilkatBinData;
tsaCert: TChilkatCert;
pkiStatus: Integer;
json: TChilkatJsonObject;
signingTime: TDtObj;
authAttrSigningTimeUtctime: TDtObj;
strVal: WideString;
certSerialNumber: WideString;
certIssuerCN: WideString;
certDigestAlgOid: WideString;
certDigestAlgName: WideString;
contentType: WideString;
messageDigest: WideString;
signingAlgOid: WideString;
signingAlgName: WideString;
authAttrContentTypeName: WideString;
authAttrContentTypeOid: WideString;
authAttrSigningTimeName: WideString;
authAttrSigningCertificateName: WideString;
authAttrSigningCertificateDer: WideString;
authAttrMessageDigestName: WideString;
authAttrMessageDigestDigest: WideString;
timestampReplyPkiStatusValue: Integer;
timestampReplyPkiStatusMeaning: WideString;
i: Integer;
count_i: Integer;
begin
success := 0;
// 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"
crypt := TChilkatCrypt2.Create(Self);
crypt.HashAlgorithm := 'sha256';
crypt.EncodingMode := 'base64';
base64Hash := crypt.HashStringENC('Hello World');
http := TChilkatHttp.Create(Self);
requestToken := TChilkatBinData.Create(Self);
optionalPolicyOid := '';
addNonce := 0;
requestTsaCert := 1;
// Create a time-stamp request token
success := http.CreateTimestampRequest('sha256',base64Hash,optionalPolicyOid,addNonce,requestTsaCert,requestToken.ControlInterface);
if (success = 0) then
begin
Memo1.Lines.Add(http.LastErrorText);
Exit;
end;
// 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
tsaUrl := 'https://freetsa.org/tsr';
// Another timestamp server you could try is: http://timestamp.digicert.com
tsaUrl := 'http://timestamp.digicert.com';
resp := TChilkatHttpResponse.Create(Self);
success := http.HttpBd('POST',tsaUrl,requestToken.ControlInterface,'application/timestamp-query',resp.ControlInterface);
if (success = 0) then
begin
Memo1.Lines.Add(http.LastErrorText);
Exit;
end;
// Get the timestamp reply from the HTTP response object.
timestampReply := TChilkatBinData.Create(Self);
resp.GetBodyBd(timestampReply.ControlInterface);
// Show the base64 encoded timestamp reply.
Memo1.Lines.Add(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
tsaCert := TChilkatCert.Create(Self);
success := tsaCert.LoadFromFile('qa_data/certs/freetsa.org.cer');
if (success = 0) then
begin
Memo1.Lines.Add(tsaCert.LastErrorText);
Exit;
end;
// 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
pkiStatus := http.VerifyTimestampReply(timestampReply.ControlInterface,tsaCert.ControlInterface);
if (pkiStatus < 0) then
begin
Memo1.Lines.Add(http.LastErrorText);
Exit;
end;
Memo1.Lines.Add('pkiStatus = ' + IntToStr(pkiStatus));
json := TChilkatJsonObject.Create(Self);
http.GetLastJsonData(json.ControlInterface);
json.EmitCompact := 0;
Memo1.Lines.Add(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="
// }
// }
// }
// ]
// }
// }
// }
signingTime := TDtObj.Create(Self);
authAttrSigningTimeUtctime := TDtObj.Create(Self);
timestampReplyPkiStatusValue := json.IntOf('timestampReply.pkiStatus.value');
timestampReplyPkiStatusMeaning := json.StringOf('timestampReply.pkiStatus.meaning');
i := 0;
count_i := json.SizeOfArray('pkcs7.verify.digestAlgorithms');
while i < count_i do
begin
json.I := i;
strVal := json.StringOf('pkcs7.verify.digestAlgorithms[i]');
i := i + 1;
end;
i := 0;
count_i := json.SizeOfArray('pkcs7.verify.signerInfo');
while i < count_i do
begin
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',0,signingTime.ControlInterface);
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',0,authAttrSigningTimeUtctime.ControlInterface);
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;
end;