sd-jwt example needs clarification

[shrikantbache]

1. In the example

   {
   	  "@context": [
   		"https://www.w3.org/ns/credentials/v2",
   		"https://www.w3.org/ns/credentials/examples/v2"
   	  ],
   	  "type": "VerifiablePresentation",
   	  "verifiableCredential": [{
   		"@context": "https://www.w3.org/ns/credentials/v2",
   		"type": "EnvelopedVerifiableCredential",
   		"id": "data:application/vc-ld+sd-jwt,eyJhbGciOiJFUzM4NCIsImtpZCI6IlVRTV9fblE0UzZCTzhuUTRuT05YeHB4aHRob3lOeGI1M0xZZ1l6LTJBQnMiLCJ0eXAiOiJ2cCtsZCtqc29uK3NkLWp3dCIsImN0eSI6InZwK2xkK2pzb24ifQ.eyJAY29udGV4dCI6WyJodHRwczovL3d3dy53My5vcmcvbnMvY3JlZGVudGlhbHMvdjIiLCJodHRwczovL3d3dy53My5vcmcvbnMvY3JlZGVudGlhbHMvZXhhbXBsZXMvdjIiXSwidmVyaWZpYWJsZUNyZWRlbnRpYWwiOlt7IkBjb250ZXh0IjpbImh0dHBzOi8vd3d3LnczLm9yZy9ucy9jcmVkZW50aWFscy92MiIsImh0dHBzOi8vd3d3LnczLm9yZy9ucy9jcmVkZW50aWFscy9leGFtcGxlcy92MiJdLCJpc3N1ZXIiOiJodHRwczovL3VuaXZlcnNpdHkuZXhhbXBsZS9pc3N1ZXJzLzU2NTA0OSIsInZhbGlkRnJvbSI6IjIwMTAtMDEtMDFUMTk6MjM6MjRaIiwiY3JlZGVudGlhbFN1YmplY3QiOnsiYWx1bW5pT2YiOnsibmFtZSI6IkV4YW1wbGUgVW5pdmVyc2l0eSIsIl9zZCI6WyJoek9LRzU2cDI5c1ByTGFDNUE4RndFdUczVU05dUlZU1p1cU9YczJlVGJBIl19LCJfc2QiOlsiWVdXVmVDRndxQmk4WDBqSF9jV0NWWU16STNhOHBjTEVYRWZicFNSQVlndyJdfSwiX3NkIjpbIjJJZjhhaUs4REZwVWJ4dEc1cGMwel9SaFJzbm1ybGFRMEhzcTk4WFNyYWsiLCJUeDZ4ZWZMVUdUZUpfYWtVUFdGeHNvbUhobGtWVnpfNzVoaVZ6eWpyYmVzIl19XSwiX3NkIjpbIjd2anl0VVN3ZEJ0MXQ5RktlOVFfS3JIRXhFWGxrTEFaTzBKM0Jpd200dlkiXSwiX3NkX2FsZyI6InNoYS0yNTYiLCJpYXQiOjE3MDY1NjI4NDksImV4cCI6MTczODE4NTI0OSwiY25mIjp7Imp3ayI6eyJrdHkiOiJFQyIsImNydiI6IlAtMzg0IiwiYWxnIjoiRVMzODQiLCJ4IjoidWtEd1U2ZzlQUVRFUWhYaEgyckRZNndMQlg3UHFlUjZBcGlhVHBEUXowcl8tdDl6UXNxem54Z0hEcE5oekZlQyIsInkiOiJMQnhVYnBVdFNGMVVKVTVpYnJIdkpINjBUSG5YMk1xa0xHZGltU1l0UGR4RlkxOEdhcldiS3FZV0djUkZHVE9BIn19fQ.kYD63YtBNYnLUTw6Szf1vs_Ug3UBXhPwCyqpNmPnPDa3rXZQhQLdB1BgaoO8zgQ-c3B41fxaXMnLHYV9-B20uboSpJP0B-2Vre917eQt1cSDswDGA_Ytvn4BSqYVBB2J~WyJFMkFsRzhsY2p0QVFrcllIbjlIbnVRIiwgInR5cGUiLCAiVmVyaWZpYWJsZVByZXNlbnRhdGlvbiJd~WyI5NldYMDRneno4cVZzOVZLU2wwYTVnIiwgImlkIiwgImh0dHA6Ly91bml2ZXJzaXR5LmV4YW1wbGUvY3JlZGVudGlhbHMvMTg3MiJd~WyJaekU2VFVaamtHMW1DWXBKMEhnc0l3IiwgInR5cGUiLCBbIlZlcmlmaWFibGVDcmVkZW50aWFsIiwgIkV4YW1wbGVBbHVtbmlDcmVkZW50aWFsIl1d~WyItQ3NsS25GZGFYb2JiQWsyU0JBVGR3IiwgImlkIiwgImRpZDpleGFtcGxlOmViZmViMWY3MTJlYmM2ZjFjMjc2ZTEyZWMyMSJd~WyJuRm1OWl9IczB3WWNoOFdkeTdnQUNRIiwgImlkIiwgImRpZDpleGFtcGxlOmMyNzZlMTJlYzIxZWJmZWIxZjcxMmViYzZmMSJd"
   	  }]
   }
   

   If the type of an EnvelopedVerifiableCredential is application/vc-ld+sd-jwt, then why does the SD-JWT in id field of verifiableCredential contain VerifiablePresentation in the payload and also in the header with typ set to vp+ld+json+sd-jwt?

   However, when I looked at Example 32: A simple URI-encoded Verifiable Credential

   data:application/vc-ld+sd-jwt,eyJhbGciOiJFUzM4NCIsImtpZCI6IlNJM1JITm91aDhvODFOT09OUFFVQUw3RWdaLWtJNl94ajlvUkV2WDF4T3ciLCJ0eXAiOiJ2YytsZCtqc29uK3NkLWp3dCIsImN0eSI6InZjK2xkK2pzb24ifQ.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.rYzbxb6j1dwop8_s491iArVVJNm6A6C3b742gOm_qYO3zdkyQU4_VxxOSJ8ECcmWj2r5KyiCNC1ojfO4Yms-zBsjt7PoMYpYWBplsqXpiIvnehmM7D0eOLi40uHXki0X~WyJSWTg1YTZNMmEwX3VDWlFTVGZmTFdRIiwgImlkIiwgImh0dHA6Ly91bml2ZXJzaXR5LmV4YW1wbGUvY3JlZGVudGlhbHMvMTg3MiJd~WyJMeG5GYTBXVm8wRUluVy1QdS1fd1dRIiwgInR5cGUiLCBbIlZlcmlmaWFibGVDcmVkZW50aWFsIiwgIkV4YW1wbGVBbHVtbmlDcmVkZW50aWFsIl1d~WyJUQVdrakpCaVpxdC1rVU54X1EweUJBIiwgImlkIiwgImh0dHBzOi8vZXhhbXBsZS5vcmcvZXhhbXBsZXMvZGVncmVlLmpzb24iXQ~WyJTd2xuZFpPZzZEZ1ZERFp5X0RvYVFBIiwgInR5cGUiLCAiSnNvblNjaGVtYSJd~WyJuSnJlU3E1Nzg3RGZMSDJCbU03cXFRIiwgImlkIiwgImRpZDpleGFtcGxlOjEyMyJd~WyIxMjNNd3hNcHRiek02YUk2aW03ME1RIiwgInR5cGUiLCAiQmFjaGVsb3JEZWdyZWUiXQ

   the url starts with data:application/vc-ld+sd-jwt, followed by the SD-JWT. This example confirms that payload it contain is verifiableCredential.

   And also the jwt of EnvelopedVerifiableCredential in the jose example looks correct as payload of jwt in the id field of verifiableCredential contains a credential:

   "id": "data:application/vc-ld+jwt,eyJraWQiOiJFeEhrQk1XOWZtYmt2VjI2Nm1ScHVQMnNVWV9OX0VXSU4xbGFwVXpPOHJvIiwiYWxnIjoiRVMzODQifQ.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.d2k4O3FytQJf83kLh-HsXuPvh6yeOlhJELVo5TF71gu7elslQyOf2ZItAXrtbXF4Kz9WivNdztOayz4VUQ0Mwa8yCDZkP9B2pH-9S_tcAFxeoeJ6Z4XnFuL_DOfkR1fP"

   Please provide justification for the SD-JWT example. If the type is EnvelopedVerifiableCredential, then the id: data:application/vc-ld+sd-jwt,eyJhbGciOiJFUzM4NCIsImtpZCI6IlVRTV9f ..... should contain only the credential and credential not wrapped inside VerifiablePresentation.

2. Additionally, the SD-JWT standard for sd-jwt presentations appears not to be followed according to the standard specified in the IETF draft: https://www.ietf.org/archive/id/draft-ietf-oauth-selective-disclosure-jwt-07.html#section-5. The sd-jwt requires a tilde (~) symbol at the end of it. if KB-JWT is not present, as per the IETF standard.

[decentralgabe]

Opened #304 to fix this. Also opened w3c/respec-vc#48 to update the plugin to add a trailing tilde.

[decentralgabe]

This will be fixed after w3c/respec-vc#49 is merged and uptaken here.