VBScript

Create JWK Set Containing Certificates

See more Certificates Examples

Demonstrates how to create a JWK Set containing N certificates. VBScript

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

' This example creates the following JWK Set from two certificates:

' {
'   "keys": [
'     {
'       "kty": "RSA",
'       "use": "sig",
'       "kid": "BB8CeFVqyaGrGNuehJIiL4dfjzw",
'       "x5t": "BB8CeFVqyaGrGNuehJIiL4dfjzw",
'       "n": "nYf1jpn7cFdQ...9Iw",
'       "e": "AQAB",
'       "x5c": [
'         "MIIDBTCCAe2...Z+NTZo"
'       ]
'     },
'     {
'       "kty": "RSA",
'       "use": "sig",
'       "kid": "M6pX7RHoraLsprfJeRCjSxuURhc",
'       "x5t": "M6pX7RHoraLsprfJeRCjSxuURhc",
'       "n": "xHScZMPo8F...EO4QQ",
'       "e": "AQAB",
'       "x5c": [
'         "MIIC8TCCAdmgA...Vt5432GA=="
'       ]
'     }
'   ]
' }

' First get two certificates from files.
set cert1 = CreateObject("Chilkat.Cert")
success = cert1.LoadFromFile("qa_data/certs/brasil_cert.pem")
If (success = 0) Then
    outFile.WriteLine(cert1.LastErrorText)
    WScript.Quit
End If

set cert2 = CreateObject("Chilkat.Cert")
success = cert2.LoadFromFile("qa_data/certs/testCert.cer")
If (success = 0) Then
    outFile.WriteLine(cert2.LastErrorText)
    WScript.Quit
End If

' We'll need this crypt object re-encode the SHA1 thumbprint from hex to base64.
set crypt = CreateObject("Chilkat.Crypt2")

set json = CreateObject("Chilkat.JsonObject")

' Let's begin with the 1st cert:
json.I = 0
success = json.UpdateString("keys[i].kty","RSA")
success = json.UpdateString("keys[i].use","sig")

hexThumbprint = cert1.Sha1Thumbprint
base64Thumbprint = crypt.ReEncode(hexThumbprint,"hex","base64")
success = json.UpdateString("keys[i].kid",base64Thumbprint)
success = json.UpdateString("keys[i].x5t",base64Thumbprint)

' (We're assuming these are RSA certificates)
' To get the modulus (n) and exponent (e), we need to get the cert's public key and then get its JWK.
set pubKey = CreateObject("Chilkat.PublicKey")
success = cert1.GetPublicKey(pubKey)

set pubKeyJwk = CreateObject("Chilkat.JsonObject")
success = pubKeyJwk.Load(pubKey.GetJwk())
success = json.UpdateString("keys[i].n",pubKeyJwk.StringOf("n"))
success = json.UpdateString("keys[i].e",pubKeyJwk.StringOf("e"))

' Now add the entire X.509 certificate 
success = json.UpdateString("keys[i].x5c[0]",cert1.GetEncoded())

' Now do the same for cert2..
json.I = 1

success = json.UpdateString("keys[i].kty","RSA")
success = json.UpdateString("keys[i].use","sig")

hexThumbprint = cert2.Sha1Thumbprint
base64Thumbprint = crypt.ReEncode(hexThumbprint,"hex","base64")
success = json.UpdateString("keys[i].kid",base64Thumbprint)
success = json.UpdateString("keys[i].x5t",base64Thumbprint)
success = cert2.GetPublicKey(pubKey)

success = pubKeyJwk.Load(pubKey.GetJwk())
success = json.UpdateString("keys[i].n",pubKeyJwk.StringOf("n"))
success = json.UpdateString("keys[i].e",pubKeyJwk.StringOf("e"))

' Now add the entire X.509 certificate 
success = json.UpdateString("keys[i].x5c[0]",cert2.GetEncoded())

' Emit the JSON..
json.EmitCompact = 0
outFile.WriteLine(json.Emit())

outFile.Close