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Create JWS with Multiple Signatures using the General JSON Serialization Format

See more JSON Web Signatures (JWS) Examples

Creates a JSON Web Signature (JWS) containing 3 signatures and output using the general JSON serialization format.

Chilkat supports all of the following JWS algorithms:

   +--------------+-------------------------------+--------------------+
   | "alg" Param  | Digital Signature or MAC      | Implementation     |
   | Value        | Algorithm                     | Requirements       |
   +--------------+-------------------------------+--------------------+
   | HS256        | HMAC using SHA-256            | Required           |
   | HS384        | HMAC using SHA-384            | Optional           |
   | HS512        | HMAC using SHA-512            | Optional           |
   | RS256        | RSASSA-PKCS1-v1_5 using       | Recommended        |
   |              | SHA-256                       |                    |
   | RS384        | RSASSA-PKCS1-v1_5 using       | Optional           |
   |              | SHA-384                       |                    |
   | RS512        | RSASSA-PKCS1-v1_5 using       | Optional           |
   |              | SHA-512                       |                    |
   | ES256        | ECDSA using P-256 and SHA-256 | Recommended+       |
   | ES384        | ECDSA using P-384 and SHA-384 | Optional           |
   | ES512        | ECDSA using P-521 and SHA-512 | Optional           |
   | PS256        | RSASSA-PSS using SHA-256 and  | Optional           |
   |              | MGF1 with SHA-256             |                    |
   | PS384        | RSASSA-PSS using SHA-384 and  | Optional           |
   |              | MGF1 with SHA-384             |                    |
   | PS512        | RSASSA-PSS using SHA-512 and  | Optional           |
   |              | MGF1 with SHA-512             |                    |
   +--------------+-------------------------------+--------------------+

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

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Local $bSuccess = False

; 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 three signatures.
; The 1st will use an ECC key, the 2nd an RSA key, and the 3rd an HMAC key.

; Prepare each key..

; ---------------------------------------------------
; Use the following RSA key loaded from JWK format.
$oSbRsaJwk = ObjCreate("Chilkat.StringBuilder")
$oSbRsaJwk.Append("{""kty"":""RSA"",")
$oSbRsaJwk.Append("""n"":""ofgWCuLjybRlzo0tZWJjNiuSfb4p4fAkd_wWJcyQoTbji9k0l8W26mPddx")
$oSbRsaJwk.Append("HmfHQp-Vaw-4qPCJrcS2mJPMEzP1Pt0Bm4d4QlL-yRT-SFd2lZS-pCgNMs")
$oSbRsaJwk.Append("D1W_YpRPEwOWvG6b32690r2jZ47soMZo9wGzjb_7OMg0LOL-bSf63kpaSH")
$oSbRsaJwk.Append("SXndS5z5rexMdbBYUsLA9e-KXBdQOS-UTo7WTBEMa2R2CapHg665xsmtdV")
$oSbRsaJwk.Append("MTBQY4uDZlxvb3qCo5ZwKh9kG4LT6_I5IhlJH7aGhyxXFvUK-DWNmoudF8")
$oSbRsaJwk.Append("NAco9_h9iaGNj8q2ethFkMLs91kzk2PAcDTW9gb54h4FRWyuXpoQ"",")
$oSbRsaJwk.Append("""e"":""AQAB"",")
$oSbRsaJwk.Append("""d"":""Eq5xpGnNCivDflJsRQBXHx1hdR1k6Ulwe2JZD50LpXyWPEAeP88vLNO97I")
$oSbRsaJwk.Append("jlA7_GQ5sLKMgvfTeXZx9SE-7YwVol2NXOoAJe46sui395IW_GO-pWJ1O0")
$oSbRsaJwk.Append("BkTGoVEn2bKVRUCgu-GjBVaYLU6f3l9kJfFNS3E0QbVdxzubSu3Mkqzjkn")
$oSbRsaJwk.Append("439X0M_V51gfpRLI9JYanrC4D4qAdGcopV_0ZHHzQlBjudU2QvXt4ehNYT")
$oSbRsaJwk.Append("CBr6XCLQUShb1juUO1ZdiYoFaFQT5Tw8bGUl_x_jTj3ccPDVZFD9pIuhLh")
$oSbRsaJwk.Append("BOneufuBiB4cS98l2SR_RQyGWSeWjnczT0QU91p1DhOVRuOopznQ"",")
$oSbRsaJwk.Append("""p"":""4BzEEOtIpmVdVEZNCqS7baC4crd0pqnRH_5IB3jw3bcxGn6QLvnEtfdUdi")
$oSbRsaJwk.Append("YrqBdss1l58BQ3KhooKeQTa9AB0Hw_Py5PJdTJNPY8cQn7ouZ2KKDcmnPG")
$oSbRsaJwk.Append("BY5t7yLc1QlQ5xHdwW1VhvKn-nXqhJTBgIPgtldC-KDV5z-y2XDwGUc"",")
$oSbRsaJwk.Append("""q"":""uQPEfgmVtjL0Uyyx88GZFF1fOunH3-7cepKmtH4pxhtCoHqpWmT8YAmZxa")
$oSbRsaJwk.Append("ewHgHAjLYsp1ZSe7zFYHj7C6ul7TjeLQeZD_YwD66t62wDmpe_HlB-TnBA")
$oSbRsaJwk.Append("-njbglfIsRLtXlnDzQkv5dTltRJ11BKBBypeeF6689rjcJIDEz9RWdc"",")
$oSbRsaJwk.Append("""dp"":""BwKfV3Akq5_MFZDFZCnW-wzl-CCo83WoZvnLQwCTeDv8uzluRSnm71I3Q")
$oSbRsaJwk.Append("CLdhrqE2e9YkxvuxdBfpT_PI7Yz-FOKnu1R6HsJeDCjn12Sk3vmAktV2zb")
$oSbRsaJwk.Append("34MCdy7cpdTh_YVr7tss2u6vneTwrA86rZtu5Mbr1C1XsmvkxHQAdYo0"",")
$oSbRsaJwk.Append("""dq"":""h_96-mK1R_7glhsum81dZxjTnYynPbZpHziZjeeHcXYsXaaMwkOlODsWa")
$oSbRsaJwk.Append("7I9xXDoRwbKgB719rrmI2oKr6N3Do9U0ajaHF-NKJnwgjMd2w9cjz3_-ky")
$oSbRsaJwk.Append("NlxAr2v4IKhGNpmM5iIgOS1VZnOZ68m6_pbLBSp3nssTdlqvd0tIiTHU"",")
$oSbRsaJwk.Append("""qi"":""IYd7DHOhrWvxkwPQsRM2tOgrjbcrfvtQJipd-DlcxyVuuM9sQLdgjVk2o")
$oSbRsaJwk.Append("y26F0EmpScGLq2MowX7fhd_QJQ3ydy5cY7YIBi87w93IKLEdfnbJtoOPLU")
$oSbRsaJwk.Append("W0ITrJReOgo1cq9SbsxYawBgfp_gh6A5603k2-ZQwVK0JKSHuLFkuQ3U""")
$oSbRsaJwk.Append("}")

$oRsaKey = ObjCreate("Chilkat.PrivateKey")
; Note: This example loads the RSA key from JWK format.  Any format can be loaded
; into the private key object. (See the online reference documentation..)
$bSuccess = $oRsaKey.LoadJwk($oSbRsaJwk.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oRsaKey.LastErrorText & @CRLF)
    Exit
EndIf

; ---------------------------------------------------
; Use the following ECC key loaded from JWK format.
$oSbEccJwk = ObjCreate("Chilkat.StringBuilder")
$oSbEccJwk.Append("{""kty"":""EC"",")
$oSbEccJwk.Append("""crv"":""P-256"",")
$oSbEccJwk.Append("""x"":""f83OJ3D2xF1Bg8vub9tLe1gHMzV76e8Tus9uPHvRVEU"",")
$oSbEccJwk.Append("""y"":""x_FEzRu9m36HLN_tue659LNpXW6pCyStikYjKIWI5a0"",")
$oSbEccJwk.Append("""d"":""jpsQnnGQmL-YBIffH1136cspYG6-0iY7X1fCE9-E9LI""")
$oSbEccJwk.Append("}")

$oEccKey = ObjCreate("Chilkat.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..)
$bSuccess = $oEccKey.LoadJwk($oSbEccJwk.GetAsString())
If ($bSuccess <> True) Then
    ConsoleWrite($oEccKey.LastErrorText & @CRLF)
    Exit
EndIf

; ---------------------------------------------------
; The HMAC key (in base64url format)
Local $sHmacKey = "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow"

; ---------------------------------------------------
; Prepare the headers..
; RSASSA-PKCS1-v1_5 SHA-256
$oJwsProtHdr0 = ObjCreate("Chilkat.JsonObject")
$oJwsProtHdr0.AppendString("alg","RS256")
$oJwsUnprotHdr0 = ObjCreate("Chilkat.JsonObject")
$oJwsUnprotHdr0.AppendString("kid","myRsaKey")

; ECDSA using P-256 and SHA-256
$oJwsProtHdr1 = ObjCreate("Chilkat.JsonObject")
$oJwsProtHdr1.AppendString("alg","ES256")
$oJwsUnprotHdr1 = ObjCreate("Chilkat.JsonObject")
$oJwsUnprotHdr1.AppendString("kid","myEcKey")

; HMAC using SHA-256
$oJwsProtHdr2 = ObjCreate("Chilkat.JsonObject")
$oJwsProtHdr2.AppendString("alg","HS256")
$oJwsUnprotHdr2 = ObjCreate("Chilkat.JsonObject")
$oJwsUnprotHdr2.AppendString("kid","myMacKey")

; ---------------------------------------------------
; First set the JWS headers, keys, and payload, then we'll create the JWS...
$oJws = ObjCreate("Chilkat.Jws")

$oJws.SetProtectedHeader(0,$oJwsProtHdr0)
$oJws.SetUnprotectedHeader(0,$oJwsUnprotHdr0)
$oJws.SetProtectedHeader(1,$oJwsProtHdr1)
$oJws.SetUnprotectedHeader(1,$oJwsUnprotHdr1)
$oJws.SetProtectedHeader(2,$oJwsProtHdr2)
$oJws.SetUnprotectedHeader(2,$oJwsUnprotHdr2)

$oJws.SetPrivateKey(0,$oRsaKey)
$oJws.SetPrivateKey(1,$oEccKey)
$oJws.SetMacKey(2,$sHmacKey,"base64url")

Local $bIncludeBom = False
Local $sPayloadStr = "In our village, folks say God crumbles up the old moon into stars."
$oJws.SetPayload($sPayloadStr,"utf-8",$bIncludeBom)

; ---------------------------------------------------
; Create the JWS.
; Givent that multiple signatures will exist, only the general JSON serialization 
; format is possible, and that is what will be produced.
Local $sJwsStr = $oJws.CreateJws()
If ($oJws.LastMethodSuccess <> True) Then
    ConsoleWrite($oJws.LastErrorText & @CRLF)
    Exit
EndIf

; The jwsStr is contains 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..
$oJson = ObjCreate("Chilkat.JsonObject")
$oJson.Load($sJwsStr)
$oJson.EmitCompact = False
ConsoleWrite($oJson.Emit() & @CRLF)

; Sample output:

; { 
;   "payload": "SW4gb3VyIHZpbGxhZ2UsIGZvbGtzIHNheSBHb2QgY3J1bWJsZXMgdXAgdGhlIG9sZCBtb29uIGludG8gc3RhcnMu",
;   "signatures": [
;     { 
;       "protected": "eyJhbGciOiJSUzI1NiJ9",
;       "header": { 
;         "kid": "myRsaKey"
;       },
;       "signature": "B04c24gSnpVm1Z-_bemfyNMCpZm6Knj1yB-yzaIOvijsWfDgoF_mSJccTIbzapNgwJudnobr5iDOfZWiRR9iqCyDJLe5M1S40vFF7MFEI3JecYRgrRc6n1lTkYLMRyVq48BwbQlmKgPqmK9drun3agklsr0FmgNx65pfmcnlYdXsgwxf8WbgppefrlrMImp-98-dNtBcUL8ce1aOjbcyVFjGMCzpm3JerQqIzWQvEwBstnMEQle73KHcyx_nsTmlzY70CaydbRTsciOATL7WfiMwuX1q9Y2NIpTg3CbOTWKdwjh7iyfiAKQxNBaF2mApnqj9hjpf8GwR-CfxAzJtPg"
;     },
;     { 
;       "protected": "eyJhbGciOiJFUzI1NiJ9",
;       "header": { 
;         "kid": "myEcKey"
;       },
;       "signature": "2cbugKq0ERaQMh01n2B-86EZFYleeMf8bsccaQMxzOxAg14PxfjR3IImvodTJYqkmfBJYW203etz2-7ZtJUOGw"
;     },
;     { 
;       "protected": "eyJhbGciOiJIUzI1NiJ9",
;       "header": { 
;         "kid": "myMacKey"
;       },
;       "signature": "e7R9gjx0RsUNa3c7qd8k9mQGEhtcG8vsN1W7jbLb2MA"
;     }
;   ]
; }