Delphi DLL Requires Chilkat v11.0.0+
Delphi DLL
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 DLL Downloads
var
success: Boolean;
crypt: HCkCrypt2;
base64Hash: PWideChar;
http: HCkHttp;
requestToken: HCkBinData;
optionalPolicyOid: PWideChar;
addNonce: Boolean;
requestTsaCert: Boolean;
tsaUrl: PWideChar;
resp: HCkHttpResponse;
timestampReply: HCkBinData;
tsaCert: HCkCert;
pkiStatus: Integer;
json: HCkJsonObject;
signingTime: HCkDtObj;
authAttrSigningTimeUtctime: HCkDtObj;
strVal: PWideChar;
certSerialNumber: PWideChar;
certIssuerCN: PWideChar;
certDigestAlgOid: PWideChar;
certDigestAlgName: PWideChar;
contentType: PWideChar;
messageDigest: PWideChar;
signingAlgOid: PWideChar;
signingAlgName: PWideChar;
authAttrContentTypeName: PWideChar;
authAttrContentTypeOid: PWideChar;
authAttrSigningTimeName: PWideChar;
authAttrSigningCertificateName: PWideChar;
authAttrSigningCertificateDer: PWideChar;
authAttrMessageDigestName: PWideChar;
authAttrMessageDigestDigest: PWideChar;
timestampReplyPkiStatusValue: Integer;
timestampReplyPkiStatusMeaning: PWideChar;
i: Integer;
count_i: Integer;
begin
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"
crypt := CkCrypt2_Create();
CkCrypt2_putHashAlgorithm(crypt,'sha256');
CkCrypt2_putEncodingMode(crypt,'base64');
base64Hash := CkCrypt2__hashStringENC(crypt,'Hello World');
http := CkHttp_Create();
requestToken := CkBinData_Create();
optionalPolicyOid := '';
addNonce := False;
requestTsaCert := True;
// Create a time-stamp request token
success := CkHttp_CreateTimestampRequest(http,'sha256',base64Hash,optionalPolicyOid,addNonce,requestTsaCert,requestToken);
if (success = False) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
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 := CkHttpResponse_Create();
success := CkHttp_HttpBd(http,'POST',tsaUrl,requestToken,'application/timestamp-query',resp);
if (success = False) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
// Get the timestamp reply from the HTTP response object.
timestampReply := CkBinData_Create();
CkHttpResponse_GetBodyBd(resp,timestampReply);
// Show the base64 encoded timestamp reply.
Memo1.Lines.Add(CkBinData__getEncoded(timestampReply,'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 := CkCert_Create();
success := CkCert_LoadFromFile(tsaCert,'qa_data/certs/freetsa.org.cer');
if (success = False) then
begin
Memo1.Lines.Add(CkCert__lastErrorText(tsaCert));
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 := CkHttp_VerifyTimestampReply(http,timestampReply,tsaCert);
if (pkiStatus < 0) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
Memo1.Lines.Add('pkiStatus = ' + IntToStr(pkiStatus));
json := CkJsonObject_Create();
CkHttp_GetLastJsonData(http,json);
CkJsonObject_putEmitCompact(json,False);
Memo1.Lines.Add(CkJsonObject__emit(json));
// 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 := CkDtObj_Create();
authAttrSigningTimeUtctime := CkDtObj_Create();
timestampReplyPkiStatusValue := CkJsonObject_IntOf(json,'timestampReply.pkiStatus.value');
timestampReplyPkiStatusMeaning := CkJsonObject__stringOf(json,'timestampReply.pkiStatus.meaning');
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'pkcs7.verify.digestAlgorithms');
while i < count_i do
begin
CkJsonObject_putI(json,i);
strVal := CkJsonObject__stringOf(json,'pkcs7.verify.digestAlgorithms[i]');
i := i + 1;
end;
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'pkcs7.verify.signerInfo');
while i < count_i do
begin
CkJsonObject_putI(json,i);
certSerialNumber := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].cert.serialNumber');
certIssuerCN := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].cert.issuerCN');
certDigestAlgOid := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].cert.digestAlgOid');
certDigestAlgName := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].cert.digestAlgName');
contentType := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].contentType');
CkJsonObject_DtOf(json,'pkcs7.verify.signerInfo[i].signingTime',False,signingTime);
messageDigest := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].messageDigest');
signingAlgOid := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].signingAlgOid');
signingAlgName := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].signingAlgName');
authAttrContentTypeName := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.3".name');
authAttrContentTypeOid := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.3".oid');
authAttrSigningTimeName := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.5".name');
CkJsonObject_DtOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.5".utctime',False,authAttrSigningTimeUtctime);
authAttrSigningCertificateName := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.16.2.12".name');
authAttrSigningCertificateDer := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.16.2.12".der');
authAttrMessageDigestName := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.4".name');
authAttrMessageDigestDigest := CkJsonObject__stringOf(json,'pkcs7.verify.signerInfo[i].authAttr."1.2.840.113549.1.9.4".digest');
i := i + 1;
end;
CkCrypt2_Dispose(crypt);
CkHttp_Dispose(http);
CkBinData_Dispose(requestToken);
CkHttpResponse_Dispose(resp);
CkBinData_Dispose(timestampReply);
CkCert_Dispose(tsaCert);
CkJsonObject_Dispose(json);
CkDtObj_Dispose(signingTime);
CkDtObj_Dispose(authAttrSigningTimeUtctime);