C
C
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 C Downloads
#include <C_CkCrypt2.h>
#include <C_CkHttp.h>
#include <C_CkBinData.h>
#include <C_CkHttpResponse.h>
#include <C_CkCert.h>
#include <C_CkJsonObject.h>
#include <C_CkDtObj.h>
void ChilkatSample(void)
{
BOOL success;
HCkCrypt2 crypt;
const char *base64Hash;
HCkHttp http;
HCkBinData requestToken;
const char *optionalPolicyOid;
BOOL addNonce;
BOOL requestTsaCert;
const char *tsaUrl;
HCkHttpResponse resp;
HCkBinData timestampReply;
HCkCert tsaCert;
int pkiStatus;
HCkJsonObject json;
HCkDtObj signingTime;
HCkDtObj authAttrSigningTimeUtctime;
const char *strVal;
const char *certSerialNumber;
const char *certIssuerCN;
const char *certDigestAlgOid;
const char *certDigestAlgName;
const char *contentType;
const char *messageDigest;
const char *signingAlgOid;
const char *signingAlgName;
const char *authAttrContentTypeName;
const char *authAttrContentTypeOid;
const char *authAttrSigningTimeName;
const char *authAttrSigningCertificateName;
const char *authAttrSigningCertificateDer;
const char *authAttrMessageDigestName;
const char *authAttrMessageDigestDigest;
int timestampReplyPkiStatusValue;
const char *timestampReplyPkiStatusMeaning;
int i;
int count_i;
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) {
printf("%s\n",CkHttp_lastErrorText(http));
CkCrypt2_Dispose(crypt);
CkHttp_Dispose(http);
CkBinData_Dispose(requestToken);
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
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) {
printf("%s\n",CkHttp_lastErrorText(http));
CkCrypt2_Dispose(crypt);
CkHttp_Dispose(http);
CkBinData_Dispose(requestToken);
CkHttpResponse_Dispose(resp);
return;
}
// Get the timestamp reply from the HTTP response object.
timestampReply = CkBinData_Create();
CkHttpResponse_GetBodyBd(resp,timestampReply);
// Show the base64 encoded timestamp reply.
printf("%s\n",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) {
printf("%s\n",CkCert_lastErrorText(tsaCert));
CkCrypt2_Dispose(crypt);
CkHttp_Dispose(http);
CkBinData_Dispose(requestToken);
CkHttpResponse_Dispose(resp);
CkBinData_Dispose(timestampReply);
CkCert_Dispose(tsaCert);
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
pkiStatus = CkHttp_VerifyTimestampReply(http,timestampReply,tsaCert);
if (pkiStatus < 0) {
printf("%s\n",CkHttp_lastErrorText(http));
CkCrypt2_Dispose(crypt);
CkHttp_Dispose(http);
CkBinData_Dispose(requestToken);
CkHttpResponse_Dispose(resp);
CkBinData_Dispose(timestampReply);
CkCert_Dispose(tsaCert);
return;
}
printf("pkiStatus = %d\n",pkiStatus);
json = CkJsonObject_Create();
CkHttp_GetLastJsonData(http,json);
CkJsonObject_putEmitCompact(json,FALSE);
printf("%s\n",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="
// }
// }
// }
// ]
// }
// }
// }
// Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
// See this example explaining how this memory should be used: const char * functions.
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) {
CkJsonObject_putI(json,i);
strVal = CkJsonObject_stringOf(json,"pkcs7.verify.digestAlgorithms[i]");
i = i + 1;
}
i = 0;
count_i = CkJsonObject_SizeOfArray(json,"pkcs7.verify.signerInfo");
while (i < count_i) {
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;
}
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);
}