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PolicyRunner.kt
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PolicyRunner.kt
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package id.walt.credentials.verification
import id.walt.credentials.verification.models.PolicyRequest
import id.walt.credentials.verification.models.PolicyRequest.Companion.parsePolicyRequests
import id.walt.credentials.verification.models.PolicyResult
import id.walt.credentials.verification.models.PresentationResultEntry
import id.walt.credentials.verification.models.PresentationVerificationResponse
import id.walt.crypto.utils.JwsUtils.decodeJws
import id.walt.did.dids.DidService
import id.walt.did.dids.resolver.LocalResolver
import kotlinx.coroutines.coroutineScope
import kotlinx.coroutines.launch
import kotlinx.coroutines.sync.Mutex
import kotlinx.coroutines.sync.withLock
import kotlinx.serialization.encodeToString
import kotlinx.serialization.json.*
import kotlin.time.measureTime
object PolicyRunner {
private fun JsonObject.getW3CType() =
(this["type"] ?: this["vc"]?.jsonObject?.get("type") ?: this["vp"]?.jsonObject?.get("type")
?: throw IllegalArgumentException("No `type` supplied: $this")).let {
when (it) {
is JsonArray -> (it.lastOrNull()
?: throw IllegalArgumentException("Empty `type` array! Please provide an type in the list."))
.jsonPrimitive.content
is JsonPrimitive -> it.content
else -> throw IllegalArgumentException("Invalid type of `type`-attribute: ${it::class.simpleName}")
}
}
suspend fun PolicyRequest.runPolicyRequest(dataToVerify: JsonElement, context: Map<String, Any>): Result<Any> {
return when (policy) {
is JwtVerificationPolicy -> {
check(dataToVerify is JsonPrimitive) { "Tried to apply JwtVerificationPolicy to non-jwt data: $policy" }
policy.verify(dataToVerify.content, args, context)
}
is CredentialDataValidatorPolicy -> {
check(dataToVerify is JsonObject) { "Tried to apply CredentialDataValidatorPolicy to non-credential data: $policy" }
val credentialData = when {
dataToVerify["vc"] != null -> dataToVerify["vc"]!!.jsonObject
else -> dataToVerify
}
policy.verify(credentialData, args, context)
}
is CredentialWrapperValidatorPolicy -> {
check(dataToVerify is JsonObject) { "Tried to apply CredentialWrapperValidatorPolicy to non-credential data: $policy" }
policy.verify(dataToVerify, args, context)
}
else -> throw IllegalArgumentException("Unsupported policy type: ${policy::class.simpleName}")
}
}
suspend fun verifyPresentation(
vpTokenJwt: String,
vpPolicies: List<PolicyRequest>,
globalVcPolicies: List<PolicyRequest>,
specificCredentialPolicies: Map<String, List<PolicyRequest>>,
presentationContext: Map<String, Any>
): PresentationVerificationResponse {
val providedJws = vpTokenJwt.decodeJws() // usually VP
val payload = providedJws.payload
val vpType = payload.getW3CType()
val verifiableCredentialJwts =
(payload["vp"]?.jsonObject?.get("verifiableCredential") ?: payload["verifiableCredential"]
?: TODO("Provided data does not have `verifiableCredential` array."))
.jsonArray
.map { it.jsonPrimitive.content }
val results = ArrayList<PresentationResultEntry>()
val resultMutex = Mutex()
var policiesRun = 0
val time = measureTime {
coroutineScope {
suspend fun runPolicyRequests(
resultIdx: Int,
policyRequests: List<PolicyRequest>,
jwt: String,
context: Map<String, Any> = emptyMap()
) {
policyRequests.forEach { policyRequest ->
launch {
runCatching {
val dataForPolicy: JsonElement = when (policyRequest.policy) {
is JwtVerificationPolicy -> JsonPrimitive(jwt)
is CredentialDataValidatorPolicy, is CredentialWrapperValidatorPolicy -> jwt.decodeJws().payload
else -> throw IllegalArgumentException("Unsupported policy type: ${policyRequest.policy::class.simpleName}")
}
val runResult = policyRequest.runPolicyRequest(dataForPolicy, context)
val policyResult = PolicyResult(policyRequest, runResult)
resultMutex.withLock {
policiesRun++
results[resultIdx].policyResults.add(policyResult)
}
}.onFailure {
println("Error executing policy: ${policyRequest.policy.name}")
it.printStackTrace()
resultMutex.withLock {
results[resultIdx].policyResults.add(PolicyResult(policyRequest, Result.failure(it)))
}
}
}
}
}
fun addResultEntryFor(type: String): Int {
results.add(PresentationResultEntry(type))
return results.size - 1
}
/* VP Policies */
val vpIdx = addResultEntryFor(vpType)
runPolicyRequests(vpIdx, vpPolicies, vpTokenJwt, presentationContext)
// VCs
verifiableCredentialJwts.forEach { credentialJwt ->
val credentialType = credentialJwt.decodeJws().payload.getW3CType()
val vcIdx = addResultEntryFor(credentialType)
/* Global VC Policies */
runPolicyRequests(vcIdx, globalVcPolicies, credentialJwt)
/* Specific Credential Policies */
specificCredentialPolicies[credentialType]?.let { specificPolicyRequests ->
runPolicyRequests(vcIdx, specificPolicyRequests, credentialJwt)
}
}
}
}
return PresentationVerificationResponse(results, time, policiesRun)
}
}
suspend fun main() {
DidService.apply {
registerResolver(LocalResolver())
updateResolversForMethods()
}
val vpToken =
"eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDprZXk6ejZNa3BkQ3FUNWZIWlZBYmRRdjJTS1dGTWdyTHN2UmFZdVRmSnpDdkJ4TG4xWHBzI3o2TWtwZENxVDVmSFpWQWJkUXYyU0tXRk1nckxzdlJhWXVUZkp6Q3ZCeExuMVhwcyJ9.eyJzdWIiOiJkaWQ6a2V5Ono2TWtwZENxVDVmSFpWQWJkUXYyU0tXRk1nckxzdlJhWXVUZkp6Q3ZCeExuMVhwcyIsIm5iZiI6MTY5Njc2MTcxOSwiaWF0IjoxNjk2NzYxNzc5LCJqdGkiOiJ1cm46dXVpZDpmMjM2ODMxNy03MjhjLTRhMWQtYWMyNC1kMTI4OTI2N2M5N2MiLCJpc3MiOiJkaWQ6a2V5Ono2TWtwZENxVDVmSFpWQWJkUXYyU0tXRk1nckxzdlJhWXVUZkp6Q3ZCeExuMVhwcyIsIm5vbmNlIjoiIiwidnAiOnsiQGNvbnRleHQiOlsiaHR0cHM6Ly93d3cudzMub3JnLzIwMTgvY3JlZGVudGlhbHMvdjEiXSwidHlwZSI6WyJWZXJpZmlhYmxlUHJlc2VudGF0aW9uIl0sImlkIjoidXJuOnV1aWQ6ZDFhZGUxMTMtMTU2ZC00MDk4LWI4NmItZTQyMmY0ZDQ3MTE3IiwiaG9sZGVyIjoiZGlkOmtleTp6Nk1rcGRDcVQ1ZkhaVkFiZFF2MlNLV0ZNZ3JMc3ZSYVl1VGZKekN2QnhMbjFYcHMiLCJ2ZXJpZmlhYmxlQ3JlZGVudGlhbCI6WyJleUpoYkdjaU9pSkZaRVJUUVNJc0ltdHBaQ0k2SW1ScFpEcHJaWGs2ZWpaTmEzQlNZMjlVUmpJMFMxZHJlRzlTYUdSWmNFTm9VSFpCTkVNM2FuQkdaelZ4ZDI4eldqSXlaM05pTVdoeUluMC5leUp6ZFdJaU9pSmthV1E2YTJWNU9ubzJUV3R3WkVOeFZEVm1TRnBXUVdKa1VYWXlVMHRYUmsxbmNreHpkbEpoV1hWVVprcDZRM1pDZUV4dU1WaHdjeU42TmsxcmNHUkRjVlExWmtoYVZrRmlaRkYyTWxOTFYwWk5aM0pNYzNaU1lWbDFWR1pLZWtOMlFuaE1iakZZY0hNaUxDSnBjM01pT2lKa2FXUTZhMlY1T25vMlRXdHdVbU52VkVZeU5FdFhhM2h2VW1oa1dYQkRhRkIyUVRSRE4ycHdSbWMxY1hkdk0xb3lNbWR6WWpGb2NpSXNJblpqSWpwN0lrQmpiMjUwWlhoMElqcGJJbWgwZEhCek9pOHZkM2QzTG5jekxtOXlaeTh5TURFNEwyTnlaV1JsYm5ScFlXeHpMM1l4SWl3aWFIUjBjSE02THk5d2RYSnNMbWx0YzJkc2IySmhiQzV2Y21jdmMzQmxZeTl2WWk5Mk0zQXdMMk52Ym5SbGVIUXVhbk52YmlKZExDSnBaQ0k2SW5WeWJqcDFkV2xrT2psaFlXTmtPREZtTFRjM1lUTXRORGRoWWkxaU1tSXlMVGswTlRFd01qazFOVFl5TXlJc0luUjVjR1VpT2xzaVZtVnlhV1pwWVdKc1pVTnlaV1JsYm5ScFlXd2lMQ0pQY0dWdVFtRmtaMlZEY21Wa1pXNTBhV0ZzSWwwc0ltNWhiV1VpT2lKS1JrWWdlQ0IyWXkxbFpIVWdVR3gxWjBabGMzUWdNeUJKYm5SbGNtOXdaWEpoWW1sc2FYUjVJaXdpYVhOemRXVnlJanA3SW5SNWNHVWlPbHNpVUhKdlptbHNaU0pkTENKcFpDSTZJbVJwWkRwclpYazZlalpOYTNCU1kyOVVSakkwUzFkcmVHOVNhR1JaY0VOb1VIWkJORU0zYW5CR1p6VnhkMjh6V2pJeVozTmlNV2h5SWl3aWJtRnRaU0k2SWtwdlluTWdabTl5SUhSb1pTQkdkWFIxY21VZ0tFcEdSaWtpTENKMWNtd2lPaUpvZEhSd2N6b3ZMM2QzZHk1cVptWXViM0puTHlJc0ltbHRZV2RsSWpvaWFIUjBjSE02THk5M00yTXRZMk5uTG1kcGRHaDFZaTVwYnk5Mll5MWxaQzl3YkhWblptVnpkQzB4TFRJd01qSXZhVzFoWjJWekwwcEdSbDlNYjJkdlRHOWphM1Z3TG5CdVp5SjlMQ0pwYzNOMVlXNWpaVVJoZEdVaU9pSXlNREl6TFRFd0xUQTBWREl6T2pVM09qQTVMalExTURNeU1qVXdNbG9pTENKamNtVmtaVzUwYVdGc1UzVmlhbVZqZENJNmV5SjBlWEJsSWpwYklrRmphR2xsZG1WdFpXNTBVM1ZpYW1WamRDSmRMQ0pwWkNJNkltUnBaRHByWlhrNmVqWk5hM0JrUTNGVU5XWklXbFpCWW1SUmRqSlRTMWRHVFdkeVRITjJVbUZaZFZSbVNucERka0o0VEc0eFdIQnpJM28yVFd0d1pFTnhWRFZtU0ZwV1FXSmtVWFl5VTB0WFJrMW5ja3h6ZGxKaFdYVlVaa3A2UTNaQ2VFeHVNVmh3Y3lJc0ltRmphR2xsZG1WdFpXNTBJanA3SW1sa0lqb2lkWEp1T25WMWFXUTZZV015TlRSaVpEVXRPR1poWkMwMFltSXhMVGxrTWprdFpXWmtPVE00TlRNMk9USTJJaXdpZEhsd1pTSTZXeUpCWTJocFpYWmxiV1Z1ZENKZExDSnVZVzFsSWpvaVNrWkdJSGdnZG1NdFpXUjFJRkJzZFdkR1pYTjBJRE1nU1c1MFpYSnZjR1Z5WVdKcGJHbDBlU0lzSW1SbGMyTnlhWEIwYVc5dUlqb2lWR2hwY3lCM1lXeHNaWFFnYzNWd2NHOXlkSE1nZEdobElIVnpaU0J2WmlCWE0wTWdWbVZ5YVdacFlXSnNaU0JEY21Wa1pXNTBhV0ZzY3lCaGJtUWdhR0Z6SUdSbGJXOXVjM1J5WVhSbFpDQnBiblJsY205d1pYSmhZbWxzYVhSNUlHUjFjbWx1WnlCMGFHVWdjSEpsYzJWdWRHRjBhVzl1SUhKbGNYVmxjM1FnZDI5eWEyWnNiM2NnWkhWeWFXNW5JRXBHUmlCNElGWkRMVVZFVlNCUWJIVm5SbVZ6ZENBekxpSXNJbU55YVhSbGNtbGhJanA3SW5SNWNHVWlPaUpEY21sMFpYSnBZU0lzSW01aGNuSmhkR2wyWlNJNklsZGhiR3hsZENCemIyeDFkR2x2Ym5NZ2NISnZkbWxrWlhKeklHVmhjbTVsWkNCMGFHbHpJR0poWkdkbElHSjVJR1JsYlc5dWMzUnlZWFJwYm1jZ2FXNTBaWEp2Y0dWeVlXSnBiR2wwZVNCa2RYSnBibWNnZEdobElIQnlaWE5sYm5SaGRHbHZiaUJ5WlhGMVpYTjBJSGR2Y210bWJHOTNMaUJVYUdseklHbHVZMngxWkdWeklITjFZMk5sYzNObWRXeHNlU0J5WldObGFYWnBibWNnWVNCd2NtVnpaVzUwWVhScGIyNGdjbVZ4ZFdWemRDd2dZV3hzYjNkcGJtY2dkR2hsSUdodmJHUmxjaUIwYnlCelpXeGxZM1FnWVhRZ2JHVmhjM1FnZEhkdklIUjVjR1Z6SUc5bUlIWmxjbWxtYVdGaWJHVWdZM0psWkdWdWRHbGhiSE1nZEc4Z1kzSmxZWFJsSUdFZ2RtVnlhV1pwWVdKc1pTQndjbVZ6Wlc1MFlYUnBiMjRzSUhKbGRIVnlibWx1WnlCMGFHVWdjSEpsYzJWdWRHRjBhVzl1SUhSdklIUm9aU0J5WlhGMVpYTjBiM0lzSUdGdVpDQndZWE56YVc1bklIWmxjbWxtYVdOaGRHbHZiaUJ2WmlCMGFHVWdjSEpsYzJWdWRHRjBhVzl1SUdGdVpDQjBhR1VnYVc1amJIVmtaV1FnWTNKbFpHVnVkR2xoYkhNdUluMHNJbWx0WVdkbElqcDdJbWxrSWpvaWFIUjBjSE02THk5M00yTXRZMk5uTG1kcGRHaDFZaTVwYnk5Mll5MWxaQzl3YkhWblptVnpkQzB6TFRJd01qTXZhVzFoWjJWekwwcEdSaTFXUXkxRlJGVXRVRXhWUjBaRlUxUXpMV0poWkdkbExXbHRZV2RsTG5CdVp5SXNJblI1Y0dVaU9pSkpiV0ZuWlNKOWZYMTlmUS54Qkg1b0dwZm9xdFpXMTdhMEtlak1tUkUtNDhsMWt6bzExc2lrZUxkR0JoMHFMQ3E5d2pJeUZHeWxVMUxoM0FHaWN1VGRLdDB0bkJqRXhud29ZMmRCZyJdfX0.-29z2twNHmK3tIwS59R-WiHuOhBNJbUS5YXKPCbCaKhPa8QyD1Z8hZ-G6ECFY8K4ZSnoB5b7OCyvvIclYj8gAA"
//language=json
val vpPolicies = Json.parseToJsonElement(
"""
[
"signature",
"expired",
"not-before"
]
"""
).jsonArray.parsePolicyRequests()
//language=json
val vcPolicies = Json.parseToJsonElement(
"""
[
"signature",
"expired",
"not-before"
]
"""
).jsonArray.parsePolicyRequests()
//language=json
val specificPolicies = Json.parseToJsonElement(
"""
{
"OpenBadgeCredential": [
{
"policy": "schema",
"args": {
"type": "object",
"required": ["issuer"],
"properties": {
"issuer": {
"type": "object"
}
}
}
}
]
}
"""
).jsonObject.mapValues { it.value.jsonArray.parsePolicyRequests() }
println("VP Policies: $vpPolicies")
println("VC Policies: $vcPolicies")
println("SP Policies: $specificPolicies")
val r = PolicyRunner.verifyPresentation(
vpTokenJwt = vpToken,
vpPolicies = vpPolicies,
globalVcPolicies = vcPolicies,
specificCredentialPolicies = specificPolicies,
mapOf(
"presentationSubmission" to JsonObject(emptyMap()),
"challenge" to "abc"
)
)
println(
Json { prettyPrint = true }.encodeToString(
r.toJson()
)
)
}