Go Requires Chilkat v11.0.0+
Go
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 Go Downloads
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 := chilkat.NewCrypt2()
crypt.SetHashAlgorithm("sha256")
crypt.SetEncodingMode("base64")
base64Hash := crypt.HashStringENC("Hello World")
http := chilkat.NewHttp()
requestToken := chilkat.NewBinData()
optionalPolicyOid := ""
addNonce := false
requestTsaCert := true
// Create a time-stamp request token
success = http.CreateTimestampRequest("sha256",*base64Hash,optionalPolicyOid,addNonce,requestTsaCert,requestToken)
if success == false {
fmt.Println(http.LastErrorText())
crypt.DisposeCrypt2()
http.DisposeHttp()
requestToken.DisposeBinData()
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 := chilkat.NewHttpResponse()
success = http.HttpBd("POST",tsaUrl,requestToken,"application/timestamp-query",resp)
if success == false {
fmt.Println(http.LastErrorText())
crypt.DisposeCrypt2()
http.DisposeHttp()
requestToken.DisposeBinData()
resp.DisposeHttpResponse()
return
}
// Get the timestamp reply from the HTTP response object.
timestampReply := chilkat.NewBinData()
resp.GetBodyBd(timestampReply)
// Show the base64 encoded timestamp reply.
fmt.Println(*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 := chilkat.NewCert()
success = tsaCert.LoadFromFile("qa_data/certs/freetsa.org.cer")
if success == false {
fmt.Println(tsaCert.LastErrorText())
crypt.DisposeCrypt2()
http.DisposeHttp()
requestToken.DisposeBinData()
resp.DisposeHttpResponse()
timestampReply.DisposeBinData()
tsaCert.DisposeCert()
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 := http.VerifyTimestampReply(timestampReply,tsaCert)
if pkiStatus < 0 {
fmt.Println(http.LastErrorText())
crypt.DisposeCrypt2()
http.DisposeHttp()
requestToken.DisposeBinData()
resp.DisposeHttpResponse()
timestampReply.DisposeBinData()
tsaCert.DisposeCert()
return
}
fmt.Println("pkiStatus = ", pkiStatus)
json := chilkat.NewJsonObject()
http.GetLastJsonData(json)
json.SetEmitCompact(false)
fmt.Println(*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 := chilkat.NewDtObj()
authAttrSigningTimeUtctime := chilkat.NewDtObj()
var strVal *string = new(string)
var certSerialNumber *string = new(string)
var certIssuerCN *string = new(string)
var certDigestAlgOid *string = new(string)
var certDigestAlgName *string = new(string)
var contentType *string = new(string)
var messageDigest *string = new(string)
var signingAlgOid *string = new(string)
var signingAlgName *string = new(string)
var authAttrContentTypeName *string = new(string)
var authAttrContentTypeOid *string = new(string)
var authAttrSigningTimeName *string = new(string)
var authAttrSigningCertificateName *string = new(string)
var authAttrSigningCertificateDer *string = new(string)
var authAttrMessageDigestName *string = new(string)
var authAttrMessageDigestDigest *string = new(string)
timestampReplyPkiStatusValue := json.IntOf("timestampReply.pkiStatus.value")
timestampReplyPkiStatusMeaning := json.StringOf("timestampReply.pkiStatus.meaning")
i := 0
count_i := json.SizeOfArray("pkcs7.verify.digestAlgorithms")
for i < count_i {
json.SetI(i)
strVal = json.StringOf("pkcs7.verify.digestAlgorithms[i]")
i = i + 1
}
i = 0
count_i = json.SizeOfArray("pkcs7.verify.signerInfo")
for i < count_i {
json.SetI(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
}
crypt.DisposeCrypt2()
http.DisposeHttp()
requestToken.DisposeBinData()
resp.DisposeHttpResponse()
timestampReply.DisposeBinData()
tsaCert.DisposeCert()
json.DisposeJsonObject()
signingTime.DisposeDtObj()
authAttrSigningTimeUtctime.DisposeDtObj()