(AutoIt) How to Generate a JSON Web Key (JWK)

Demonstrates how to generate the following types of JSON Web Keys:

• RSA key pair
• EC key pair
• Octet sequence key (HMAC-256)
• 192-bit AES GCM key

Note: This example requires Chilkat v9.5.0.66 or later.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

; This requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

; ----------------------------------------------
; Generate an RSA key pair in JWK format.
; (Examples for generating other key types are shown below...)
$oRsa = ObjCreate("Chilkat.Rsa")
Local $bSuccess = $oRsa.GenerateKey(2048)
Local $oRsaKey = $oRsa.ExportPrivateKeyObj()
Local $sRsaJwkStr = $oRsaKey.GetJwk()

; The string returned is the most compact possible, and therefore it is not
; very readable.  To pretty-print, load into a JSON object and emit..
$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.EmitCompact = False
$oJson.Load($sRsaJwkStr)
ConsoleWrite($oJson.Emit() & @CRLF)

; Sample RSA JWK:

; { 
;   "kty": "RSA",
;   "n": "6w1Xpof7gKmytJ3yc_yjI5_K3MvVXnBYBDy5Oh2W6Xqu_fOl3W18SjS2AU5xJrTHlB_j84yQjPyXJh_ixjACK4K4dCSYqlLmn3R7QJ84vnHLIEkqwUICqOHdCBjK5xhMrdZxIhuNlJzbARY-3u9RqjsT3HYTjA6JNHUWTYBBRou4gYGm4cJgvX4uexdikqxnze014RmZMaOV_4MR--WL4G8QfNJ2pRBEXQeKyije89H6M5oTSK7KZqFTIqu9hwNtx2oGpGAIcS0Jv5xVl-hDtwXZNwQJaOxMzLw1nwnb2kMliJa67EabQFrQY_xthQNsfzcHJJlpqYiMprW8wRkzmQ",
;   "e": "AQAB",
;   "d": "1_bnXMw-SeYhmxAwb19lqVqtMpdaES5ZwHLmoT4EpbsiQ5T1BfENrMSnoaWoEy8w3Kk8cU7qlY-TdOUBIKWFqOKvhY8GciA_Y6zLfgGNSnYVczGmxfBXr0HvKvxUmWZbNbH9OqBkQnKoSmRdGcp7l1Q2mG4o4ZuNdxRJjKXV0_DTrNLUJzst0hsfoZ6mWUrQcn39XGvvLjz9ySS-DYGI1vli3ayx8jVNuw0rU8UXVs9WmPQLvZO_ZDMhoLEeKsdejnNkUNPAUjqxcSOZRojt4BfCmbt-_1slFb0NsoaqnDVZGezd9J9ocxGuyIWHAJu9GGZEcdaFyiDDs_WA1IS_fQ",
;   "p": "9dU8f6yOklRcpV6ayVMKpyQ6AMuBTF3rZmB498eAvvTkVG1-upm8IkikTVNpPjEalc82Sxuq8oF4N5x1-F33sgVEoCZG-1WFZTn-rnPnXSALES9hqSaVYEwnh61EiY8ckjBVr9jD2nL1JKdbfgVVeo69-9PdjnKYYDVL8eLNPwM",
;   "q": "9MX2sW0GyaOsZ86AYe3eG2ZgcgKHvhJa573gih5Jvi2e-Nv-L0EVK29_DA7n0Pjm-gl9zVAsGsMMkphJyEF9QgyUlJ-59XLqWnECS5gO6WZdtHrJxVvcO-_AOrLIxeYnYcwhmaVaxs_UEpqGzupKHCWgf4cfXe49lrIsqGKH4jM",
;   "dp": "IQgj9uvSxGq9gCL0HXUhC1Bc0tqFZyN_i-QOnQybig0R2R5VVvFtTBYCrbk1fPvQHK0ZGIKBN9CZvK8zUsodjDgU_ofmJcNaBz4BsKM2RVcW5Zo-PyJGFAhnj12CxhEKv8Hq4ZP4zROBSQmLy6Uf1TX05S-Up51SSCshJ0FYXs0",
;   "dq": "RijsMiUfGfL5OvP85pUI4e-xW1yQThHyzpQlZVGTL5jiBVEBhcfw6ndWAj3Pgp2ljyvjTFNboPwhgW93Tpg-8AytFgDGi605sVzNHJ_kPlBiMZY0eYaAFQn-npSaaecziJu7UdAMugneLsruMycCwRij7Ynsmr7sFmLR3B4J9vM",
;   "qi": "jZE-a1pa8YjflpCSH5oqp1f6f6I6-hpZcLdamLCoAcjVSIPk86gtXtOFES4411-DqYzYIZM6B_g_SRYY6JpKAOuZ40mmMTlnIEoVf8BHiGl3g6bBAiN1yQGXrwXJsg2OYnocyRA-xWNdcMSSFA52SwEdar2Mmw29qVzxtC1QbpA"
; }

; ----------------------------------------------
; Generate an EC P-256 key pair in JWK format

$oPrng = ObjCreate("Chilkat.Prng")
$oEcc = ObjCreate("Chilkat.Ecc")
Local $oEcKey = $oEcc.GenEccKey("P-256",$oPrng)
If ($oEcc.LastMethodSuccess <> True) Then
    ConsoleWrite($oEcc.LastErrorText & @CRLF)
    Exit
EndIf

Local $sEcJwkStr = $oEcKey.GetJwk()
$oJson.Load($sEcJwkStr)
ConsoleWrite($oJson.Emit() & @CRLF)

; Sample EC JWK Key:
; { 
;   "kty": "EC",
;   "crv": "P-256",
;   "x": "tDeeYABgKEAbWicYPCEEI8sP4SRIhHKcHDW7VqrB4LA",
;   "y": "J08HOoIZ0rX2Me3bNFZUltfxIk1Hrc8FsLu8VaSxsMI",
;   "d": "-bqt1T0wNAN8sP5ruycQZRVlMlt3V_dSwlJ60xAX5io"
; }

; ----------------------------------------------
; Octet sequence keys are intended for representing secret keys, such as HMAC keys and AES keys.

; We'll use crypt to generate a random UUID..
$oCrypt = ObjCreate("Chilkat.Crypt2")

; AES and HMAC keys are simply random arrays of bytes
; For these, we can just build the JSON directly,
; with the help of the PRNG object.

$oJwkHmac = ObjCreate("Chilkat.JsonObject")
$oJwkHmac.EmitCompact = False

; Generate a 256-bit HMAK key (32 bytes)
$oJwkHmac.AppendString("kty","oct")
; Give the key an optional ID, which can be anything, even strings as simple as "1", "2", etc.
$oJwkHmac.AppendString("kid",$oCrypt.GenerateUuid())
; Indicate the intended key alg (optional)
$oJwkHmac.AppendString("alg","HS256")
; Generate the actual key bytes
$oJwkHmac.AppendString("k",$oPrng.GenRandom(32,"base64url"))

ConsoleWrite($oJwkHmac.Emit() & @CRLF)

; Sample HMAC-256 JWK:

; { 
;   "kty": "oct",
;   "kid": "06c2515d-41fb-e436-e405-3abb361f5f7a",
;   "alg": "HS256",
;   "k": "wR32w7yiMe5Lhb1vkW2koBpoMxpXTFYuxOYCCIEKjdE"
; }

; ----------------------------------------------
; Now generate a 192-bit (24 byte) key that could be used with AES192GCM

$oJwkAes = ObjCreate("Chilkat.JsonObject")
$oJwkAes.EmitCompact = False

$oJwkAes.AppendString("kty","oct")
$oJwkAes.AppendString("kid","2")
$oJwkAes.AppendString("k",$oPrng.GenRandom(24,"base64url"))

ConsoleWrite($oJwkAes.Emit() & @CRLF)

; Sample AES key:
; { 
;   "kty": "oct",
;   "kid": "2",
;   "k": "akAkq-L_ZTZ6-tEIhDUMtU2ENhsEgL-p"
; }