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(PowerBuilder) Create JWS using the Flattened JSON Serialization Format

Creates a JSON Web Signature (JWS) containing 1 signature and output using the flattened JSON serialization format.

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

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_SbEccJwk
oleobject loo_EccKey
integer li_Success
oleobject loo_JwsProtHdr
oleobject loo_JwsUnprotHdr
oleobject loo_Jws
integer li_BIncludeBom
string ls_PayloadStr
string ls_JwsStr
oleobject loo_Json

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

// Note: This example requires Chilkat v9.5.0.66 or greater.

// The JWS to be created will contain one signature using an ECDSA key.

loo_SbEccJwk = create oleobject
li_rc = loo_SbEccJwk.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")
if li_rc < 0 then
    destroy loo_SbEccJwk
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_SbEccJwk.Append("{\"kty\":\"EC\",")
loo_SbEccJwk.Append("\"crv\":\"P-256\",")
loo_SbEccJwk.Append("\"x\":\"f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU\",")
loo_SbEccJwk.Append("\"y\":\"x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0\",")
loo_SbEccJwk.Append("\"d\":\"jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI\"")
loo_SbEccJwk.Append("}")

loo_EccKey = create oleobject
li_rc = loo_EccKey.ConnectToNewObject("Chilkat_9_5_0.PrivateKey")

// Note: This example loads the ECDSA key from JWK format.  Any format can be loaded
// into the private key object. (See the online reference documentation..)
li_Success = loo_EccKey.LoadJwk(loo_SbEccJwk.GetAsString())
if li_Success <> 1 then
    Write-Debug loo_EccKey.LastErrorText
    destroy loo_SbEccJwk
    destroy loo_EccKey
    return
end if

// ---------------------------------------------------
// Prepare both a protected and unprotected header.

loo_JwsProtHdr = create oleobject
li_rc = loo_JwsProtHdr.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_JwsProtHdr.AppendString("alg","ES256")

loo_JwsUnprotHdr = create oleobject
li_rc = loo_JwsUnprotHdr.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_JwsUnprotHdr.AppendString("kid","myEcKey")

// ---------------------------------------------------
loo_Jws = create oleobject
li_rc = loo_Jws.ConnectToNewObject("Chilkat_9_5_0.Jws")

loo_Jws.SetProtectedHeader(0,loo_JwsProtHdr)
loo_Jws.SetUnprotectedHeader(0,loo_JwsUnprotHdr)

loo_Jws.SetPrivateKey(0,loo_EccKey)

li_BIncludeBom = 0
ls_PayloadStr = "In our village, folks say God crumbles up the old moon into stars."
loo_Jws.SetPayload(ls_PayloadStr,"utf-8",li_BIncludeBom)

// ---------------------------------------------------
// Create the JWS.
// Indicate we prefer the non-compact, flattened serialization.
loo_Jws.PreferCompact = 0
loo_Jws.PreferFlattened = 1

ls_JwsStr = loo_Jws.CreateJws()
if loo_Jws.LastMethodSuccess <> 1 then
    Write-Debug loo_Jws.LastErrorText
    destroy loo_SbEccJwk
    destroy loo_EccKey
    destroy loo_JwsProtHdr
    destroy loo_JwsUnprotHdr
    destroy loo_Jws
    return
end if

// The jwsStr is contains the flattened JSON in the smallest possible size, which is a single line.
// To get in human-readable format, load into a Chilkat JSON object and emit..
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.Load(ls_JwsStr)
loo_Json.EmitCompact = 0
Write-Debug loo_Json.Emit()

// Sample output:

// { 
//   "payload": "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu",
//   "protected": "eyJhbGciOiJFUzI1NiJ9",
//   "header": { 
//     "kid": "myEcKey"
//   },
//   "signature": "b7V2UpDPytr-kMnM_YjiQ3E0J2ucOI9LYA7mt57vccrK1rb84j9areqgQcJwOA00aWGoz4hf6sMTBfobdcJEGg"
// }


destroy loo_SbEccJwk
destroy loo_EccKey
destroy loo_JwsProtHdr
destroy loo_JwsUnprotHdr
destroy loo_Jws
destroy loo_Json

 

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