"iss": "JwtServer",
  "sub": "hrmanager",
  "email": "[email protected]",
  "jti": "e971bd9c-7655-41d5-9c49-fabc054dc466",
  "iat": 1503922683,
  "http://schemas.microsoft.com/ws/2008/06/identity/claims/role": [
  "Department": [
  "nbf": 1503922683,
  "exp": 1503924483

Awgiedawgie 104555 points

                                    var headerAndPayload = base64Encode(header) + "." + base64Encode(payload);

var secretkey = "@everone:KeepitSecret!";

signature = HMACSHA256(headerAndPayload, secretkey);

4.5 (2 Votes)
Phoenix Logan 44215 points

                                    Dim privateKeyStream As Stream = New FileStream("D:\docusign.pem", FileMode.Open)
'Dim privateKeyStream As Stream = New MemoryStream(Encoding.UTF8.GetBytes(PK))
Using SR = New StreamReader(privateKeyStream)
    If Not SR Is Nothing And SR.Peek() > 0 Then
        Dim privateKeyBytes() As Byte = ReadAsBytes(privateKeyStream)
        'Dim privateKeyBytes() As Byte = StreamToByteArray(privateKeyStream)
        'Dim privateKeyBytes() As Byte = Convert.FromBase64String(PrivateKey)
        'Dim privateKeyBytes() As Byte = Encoding.UTF8.GetBytes(PrivateKey)

        Dim privateKeyS As String = Encoding.UTF8.GetString(privateKeyBytes)

        Dim handler As JwtSecurityTokenHandler = New JwtSecurityTokenHandler()
        handler.SetDefaultTimesOnTokenCreation = False

        Dim descriptor As SecurityTokenDescriptor = New SecurityTokenDescriptor()
        descriptor.Expires = DateTime.UtcNow.AddHours(1)
        descriptor.IssuedAt = DateTime.UtcNow

        Dim scopes As List(Of String) = New List(Of String)

        descriptor.Subject = New ClaimsIdentity()
        descriptor.Subject.AddClaim(New Claim("scope", String.Join(" ", scopes)))
        descriptor.Subject.AddClaim(New Claim("aud", "account-d.docusign.com"))
        descriptor.Subject.AddClaim(New Claim("iss", "INTEGRATION_ID"))
        descriptor.Subject.AddClaim(New Claim("sub", "ACCOUNT_ID"))

        Dim RSA = CreateRSAKeyFromPem(privateKeyS)
        Dim rsaKey As RsaSecurityKey = New RsaSecurityKey(RSA)
        descriptor.SigningCredentials = New SigningCredentials(rsaKey, SecurityAlgorithms.RsaSha256Signature)

        Dim Token = handler.CreateToken(descriptor)
        Dim jwtToken As String = handler.WriteToken(Token)

        Dim baseUri As String = String.Format("https://{0}/", basePath)
        Dim RestClient As RestClient = New RestClient(baseUri)
        RestClient.Timeout = 10000

        Dim contentType As String = "application/x-www-form-urlencoded"

        Dim formParams As New Dictionary(Of String, String)
        formParams.Add("grant_type", OAuth.Grant_Type_JWT)
        formParams.Add("assertion", jwtToken)

        Dim queryParams As New Dictionary(Of String, String)

        Dim headerParams As New Dictionary(Of String, String)
        headerParams.Add("Content-Type", "application/x-www-form-urlencoded")
        headerParams.Add("Cache-Control", "no-store")
        headerParams.Add("Pragma", "no-cache")

        Dim fileParams As New Dictionary(Of String, FileParameter)
        Dim pathParams As New Dictionary(Of String, String)

        Dim postBody As Object = Nothing

        Dim request As RestRequest = PrepareRequest(basePath, Method.POST, queryParams, postBody, headerParams, formParams, fileParams, pathParams, contentType)

        Dim response As IRestResponse = RestClient.Execute(request)

        If (response.StatusCode >= HttpStatusCode.OK And response.StatusCode < HttpStatusCode.BadRequest) Then
            Dim tokenInfo As OAuth.OAuthToken = JsonConvert.DeserializeObject(Of OAuth.OAuthToken)(response.Content)
            Return tokenInfo.access_token
            Throw New ApiException(response.StatusCode, "Error while requesting server, received a non successful HTTP code " & response.ResponseStatus & " with response Body: " + response.Content, response.Content)
        End If
        Throw New ApiException(400, "Private key stream not supplied or is invalid!")
    End If
End Using

3 (1 Votes)
Phoenix Logan 44215 points

                                    const crypto = require('crypto');

const header = JSON.stringify({
    'alg': 'HS256',
    'typ': 'JWT'

const payload = JSON.stringify({
    'email': '[email protected]',
    'password': 'ya0gsqhy4wzvuvb4'

const base64Header = Buffer.from(header).toString('base64').replace(/=/g, '');
const base64Payload = Buffer.from(payload).toString('base64').replace(/=/g, '');
const secret = 'my-custom-secret';

const data = base64Header + '.' + base64Payload;

const signature = crypto
    .createHmac('sha256', secret)

const signatureUrl = signature
    .replace(/\+/g, '-')
    .replace(/\//g, '_')
    .replace(/=/g, '')


Awgiedawgie 104555 points

                                    Dim ac As ApiClient = New ApiClient()
Dim privateKeyStream() As Byte = Convert.FromBase64String(PrivateKey)
Dim tokenInfo As OAuth.OAuthToken = ac.RequestJWTUserToken("INTEGRATION_ID", "ACCOUNT_ID", "https://account-d.docusign.com/oauth/token", privateKeyStream, 1)

Awgiedawgie 104555 points

                                    Dim PrivateKey As String = "MIIEowIBAAKCAQEAjtTe7UUP/CBI9s...BLABLABLA...JfwZ2hHqFPXA9ecbhc0".Replace(vbLf, "").Replace(vbCr, "")

Dim ar1 As JObject = New JObject()
ar1.Add("typ", "JWT")
ar1.Add("alg", "RS256")

Dim header As String = Base64UrlEncoder.Encode(ar1.ToString)

Dim ar2 As JObject = New JObject()
ar2.Add("iss", "INTEGRATION_ID")
ar2.Add("sub", "GUID_VERSION_OF_USER_ID")
ar2.Add("iat", DateDiff(DateInterval.Second, New Date(1970, 1, 1), Now().ToUniversalTime))
ar2.Add("exp", DateDiff(DateInterval.Second, New Date(1970, 1, 1), DateAdd(DateInterval.Hour, 1, Now().ToUniversalTime)))
ar2.Add("aud", "account-d.docusign.com")
ar2.Add("scope", "signature")

Dim body As String = Base64UrlEncoder.Encode(ar2.ToString)

Dim stringToSign As String = header & "." & body

Dim bytesToSign() As Byte = Encoding.UTF8.GetBytes(stringToSign)

Dim keyBytes() As Byte = Convert.FromBase64String(PrivateKey)

Dim privKeyObj = Asn1Object.FromByteArray(keyBytes)
Dim privStruct = RsaPrivateKeyStructure.GetInstance(privKeyObj)

Dim sig As ISigner = SignerUtilities.GetSigner("SHA256withRSA")

sig.Init(True, New RsaKeyParameters(True, privStruct.Modulus, privStruct.PrivateExponent))

sig.BlockUpdate(bytesToSign, 0, bytesToSign.Length)
Dim signature() As Byte = sig.GenerateSignature()

Dim sign As String = Base64UrlEncoder.Encode(signature)

Return header & "." & body & "." & sign

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