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fix: dislosed fields #102

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Apr 15, 2024
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2 changes: 1 addition & 1 deletion apps/expo/package.json
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
{
"name": "expo-app",
"version": "1.3.2",
"version": "1.3.3",
"main": "expo-router/entry",
"private": true,
"scripts": {
Expand Down
18 changes: 9 additions & 9 deletions packages/agent/package.json
Original file line number Diff line number Diff line change
Expand Up @@ -4,15 +4,15 @@
"private": true,
"main": "src/index.ts",
"dependencies": {
"@credo-ts/anoncreds": "^0.5.1",
"@credo-ts/askar": "^0.5.1",
"@credo-ts/cheqd": "^0.5.1",
"@credo-ts/core": "^0.5.1",
"@credo-ts/indy-vdr": "^0.5.1",
"@credo-ts/openid4vc": "^0.5.1",
"@credo-ts/question-answer": "^0.5.1",
"@credo-ts/react-hooks": "^0.6.1",
"@credo-ts/react-native": "^0.5.1",
"@credo-ts/anoncreds": "0.5.1-alpha.17",
"@credo-ts/askar": "0.5.1-alpha.17",
"@credo-ts/cheqd": "0.5.1-alpha.17",
"@credo-ts/core": "0.5.1-alpha.17",
"@credo-ts/indy-vdr": "0.5.1-alpha.17",
"@credo-ts/openid4vc": "0.5.1-alpha.17",
"@credo-ts/question-answer": "0.5.1-alpha.17",
"@credo-ts/react-hooks": "0.6.1",
"@credo-ts/react-native": "0.5.1-alpha.17",
"@internal/utils": "*",
"@tanstack/react-query": "^4.33.0",
"query-string": "^8.1.0",
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54 changes: 48 additions & 6 deletions packages/agent/src/display.ts
Original file line number Diff line number Diff line change
Expand Up @@ -276,6 +276,52 @@ export function getCredentialExchangeForDisplay(
}
}

interface CredentialMetadata {
type: string
issuer: string
holder: string | Record<string, unknown>
validUntil?: Date
validFrom?: Date
issuedAt?: Date
}

export function filterAndMapSdJwtKeys(sdJwtVcPayload: Record<string, unknown>) {
type SdJwtVcPayload = {
iss: string
cnf: Record<string, unknown>
vct: string
iat?: number
nbf?: number
exp?: number
[key: string]: unknown
}
// TODO: We should map these claims to nice format and names
// eslint-disable-next-line @typescript-eslint/no-unused-vars
const { _sd_alg, _sd_hash, iss, vct, cnf, iat, exp, nbf, ...visibleProperties } =
sdJwtVcPayload as SdJwtVcPayload

const credentialMetadata: CredentialMetadata = {
type: vct,
issuer: iss,
holder: cnf,
}

if (iat) {
credentialMetadata.issuedAt = new Date(iat * 1000)
}
if (exp) {
credentialMetadata.validUntil = new Date(exp * 1000)
}
if (nbf) {
credentialMetadata.validFrom = new Date(nbf * 1000)
}

return {
visibleProperties,
metadata: credentialMetadata,
}
}

export function getCredentialForDisplay(credentialRecord: W3cCredentialRecord | SdJwtVcRecord) {
if (credentialRecord instanceof SdJwtVcRecord) {
// FIXME: we should probably add a decode method on the SdJwtVcRecord
Expand All @@ -289,19 +335,15 @@ export function getCredentialForDisplay(credentialRecord: W3cCredentialRecord |
const issuerDisplay = getSdJwtIssuerDisplay(openId4VcMetadata)
const credentialDisplay = getSdJwtCredentialDisplay(decodedPayload, openId4VcMetadata)

// TODO: We should map these claims to nice format and names
// eslint-disable-next-line @typescript-eslint/no-unused-vars
const { _sd_alg, _sd_hash, iss, vct, cnf, iat, exp, ...visibleProperties } = decodedPayload

// TODO: display somehow which fields can be selective disclosed
// TODO: add metadata attributes
return {
id: `sd-jwt-vc-${credentialRecord.id}` satisfies CredentialForDisplayId,
createdAt: credentialRecord.createdAt,
display: {
...credentialDisplay,
issuer: issuerDisplay,
},
attributes: visibleProperties,
attributes: filterAndMapSdJwtKeys(decodedPayload).visibleProperties,
}
} else {
const credential = JsonTransformer.toJSON(
Expand Down
28 changes: 19 additions & 9 deletions packages/agent/src/format/formatPresentation.ts
Original file line number Diff line number Diff line change
@@ -1,6 +1,8 @@
import type { DifPexCredentialsForRequest } from '@credo-ts/core'

import { getCredentialForDisplay } from '../display'
import { ClaimFormat } from '@credo-ts/core'

import { filterAndMapSdJwtKeys, getCredentialForDisplay } from '../display'

export interface FormattedSubmission {
name: string
Expand Down Expand Up @@ -28,20 +30,28 @@ export function formatDifPexCredentialsForRequest(
const [firstVerifiableCredential] = submission.verifiableCredentials
if (firstVerifiableCredential) {
// Credential can be satisfied
const { display, credential, attributes } =
getCredentialForDisplay(firstVerifiableCredential)
const { display, credential } = getCredentialForDisplay(
firstVerifiableCredential.credentialRecord
)

// TODO: support nesting
let requestedAttributes: string[]
if (firstVerifiableCredential.type === ClaimFormat.SdJwtVc) {
const { metadata, visibleProperties } = filterAndMapSdJwtKeys(
firstVerifiableCredential.disclosedPayload
)
requestedAttributes = [...Object.keys(visibleProperties), ...Object.keys(metadata)]
} else {
requestedAttributes = Object.keys(credential?.credentialSubject ?? {})
}

return {
name: submission.name ?? 'Unknown',
description: submission.purpose,
isSatisfied: true,
credentialName: display.name,
issuerName: display.issuer.name,
// FIXME: will PEX already apply SD, and thus overwrite the original? That would be really problematic
// FIXME: how do we get the requested attributes here in case of SD?
// We need to get all attributes that will be disclosed, but we don't know that here
requestedAttributes: credential?.credentialSubject
? Object.keys(credential.credentialSubject)
: Object.keys(attributes),
requestedAttributes,
backgroundColor: display.backgroundColor,
}
}
Expand Down
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