Swift Requires Chilkat v11.0.0+
Swift
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 Swift Downloads
func chilkatTest() {
var success: Bool = 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"
let crypt = CkoCrypt2()!
crypt.hashAlgorithm = "sha256"
crypt.encodingMode = "base64"
var base64Hash: String? = crypt.hashStringENC(str: "Hello World")
let http = CkoHttp()!
let requestToken = CkoBinData()!
var optionalPolicyOid: String? = ""
var addNonce: Bool = false
var requestTsaCert: Bool = true
// Create a time-stamp request token
success = http.createTimestampRequest(hashAlg: "sha256", hashVal: base64Hash, reqPolicyOid: optionalPolicyOid, addNonce: addNonce, reqTsaCert: requestTsaCert, timestampToken: requestToken)
if success == false {
print("\(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: String? = "https://freetsa.org/tsr"
// Another timestamp server you could try is: http://timestamp.digicert.com
tsaUrl = "http://timestamp.digicert.com"
let resp = CkoHttpResponse()!
success = http.httpBd(verb: "POST", url: tsaUrl, bd: requestToken, contentType: "application/timestamp-query", response: resp)
if success == false {
print("\(http.lastErrorText!)")
return
}
// Get the timestamp reply from the HTTP response object.
let timestampReply = CkoBinData()!
resp.getBodyBd(binData: timestampReply)
// Show the base64 encoded timestamp reply.
print("\(timestampReply.getEncoded(encoding: "base64")!)")
// Let's verify the timestamp reply against the TSA's cert, which we've previously downloaded.
// See https://freetsa.org/index_en.php
let tsaCert = CkoCert()!
success = tsaCert.load(fromFile: "qa_data/certs/freetsa.org.cer")
if success == false {
print("\(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: Int = http.verifyTimestampReply(timestampReply: timestampReply, tsaCert: tsaCert).intValue
if pkiStatus < 0 {
print("\(http.lastErrorText!)")
return
}
print("pkiStatus = \(pkiStatus)")
let json = CkoJsonObject()!
http.getLastJsonData(json: json)
json.emitCompact = false
print("\(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="
// }
// }
// }
// ]
// }
// }
// }
let signingTime = CkoDtObj()!
let authAttrSigningTimeUtctime = CkoDtObj()!
var strVal: String?
var certSerialNumber: String?
var certIssuerCN: String?
var certDigestAlgOid: String?
var certDigestAlgName: String?
var contentType: String?
var messageDigest: String?
var signingAlgOid: String?
var signingAlgName: String?
var authAttrContentTypeName: String?
var authAttrContentTypeOid: String?
var authAttrSigningTimeName: String?
var authAttrSigningCertificateName: String?
var authAttrSigningCertificateDer: String?
var authAttrMessageDigestName: String?
var authAttrMessageDigestDigest: String?
var timestampReplyPkiStatusValue: Int = json.int(of: "timestampReply.pkiStatus.value").intValue
var timestampReplyPkiStatusMeaning: String? = json.string(of: "timestampReply.pkiStatus.meaning")
var i: Int = 0
var count_i: Int = json.size(ofArray: "pkcs7.verify.digestAlgorithms").intValue
while i < count_i {
json.i = i
strVal = json.string(of: "pkcs7.verify.digestAlgorithms[i]")
i = i + 1
}
i = 0
count_i = json.size(ofArray: "pkcs7.verify.signerInfo").intValue
while i < count_i {
json.i = i
certSerialNumber = json.string(of: "pkcs7.verify.signerInfo[i].cert.serialNumber")
certIssuerCN = json.string(of: "pkcs7.verify.signerInfo[i].cert.issuerCN")
certDigestAlgOid = json.string(of: "pkcs7.verify.signerInfo[i].cert.digestAlgOid")
certDigestAlgName = json.string(of: "pkcs7.verify.signerInfo[i].cert.digestAlgName")
contentType = json.string(of: "pkcs7.verify.signerInfo[i].contentType")
json.dt(of: "pkcs7.verify.signerInfo[i].signingTime", bLocal: false, dt: signingTime)
messageDigest = json.string(of: "pkcs7.verify.signerInfo[i].messageDigest")
signingAlgOid = json.string(of: "pkcs7.verify.signerInfo[i].signingAlgOid")
signingAlgName = json.string(of: "pkcs7.verify.signerInfo[i].signingAlgName")
authAttrContentTypeName = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name")
authAttrContentTypeOid = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid")
authAttrSigningTimeName = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name")
json.dt(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime", bLocal: false, dt: authAttrSigningTimeUtctime)
authAttrSigningCertificateName = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.12\".name")
authAttrSigningCertificateDer = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.12\".der")
authAttrMessageDigestName = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name")
authAttrMessageDigestDigest = json.string(of: "pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest")
i = i + 1
}
}