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chore: Fixed jsMain module and implemented tests
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Zoe Maas
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Oct 2, 2024
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181 changes: 181 additions & 0 deletions
181
...n-client/src/jsMain/kotlin/com/sphereon/oid/fed/client/validation/TrustChainValidation.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| package com.sphereon.oid.fed.client.validation | ||
|
|
||
| import com.sphereon.oid.fed.client.httpclient.OidFederationClient | ||
| import com.sphereon.oid.fed.common.jwt.verify | ||
| import com.sphereon.oid.fed.common.logging.Logger | ||
| import com.sphereon.oid.fed.common.mapper.JsonMapper | ||
| import com.sphereon.oid.fed.openapi.models.EntityConfigurationStatement | ||
| import com.sphereon.oid.fed.openapi.models.Jwk | ||
| import com.sphereon.oid.fed.openapi.models.SubordinateStatement | ||
| import io.ktor.client.engine.* | ||
| import kotlinx.coroutines.CoroutineName | ||
| import kotlinx.coroutines.CoroutineScope | ||
| import kotlinx.coroutines.await | ||
| import kotlinx.coroutines.promise | ||
| import kotlinx.serialization.json.JsonElement | ||
| import kotlinx.serialization.json.JsonObject | ||
| import kotlinx.serialization.json.jsonArray | ||
| import kotlinx.serialization.json.jsonObject | ||
| import kotlinx.serialization.json.jsonPrimitive | ||
| import kotlin.also | ||
| import kotlin.collections.any | ||
| import kotlin.collections.forEach | ||
| import kotlin.collections.forEachIndexed | ||
| import kotlin.collections.isNullOrEmpty | ||
| import kotlin.collections.last | ||
| import kotlin.collections.map | ||
| import kotlin.collections.toMutableList | ||
| import kotlin.js.Date | ||
| import kotlin.js.Promise | ||
| import kotlin.let | ||
| import kotlin.run | ||
| import kotlin.text.substring | ||
| import kotlin.toString | ||
|
|
||
| object TrustChainValidation { | ||
|
|
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| private val NAME = "TrustChainValidation" | ||
|
|
||
| @OptIn(ExperimentalJsExport::class) | ||
| fun readAuthorityHints( | ||
| partyBId: String, | ||
| engine: HttpClientEngine, | ||
| trustChains: MutableList<List<EntityConfigurationStatement>> = mutableListOf(), | ||
| trustChain: MutableSet<EntityConfigurationStatement> = mutableSetOf() | ||
| ): Promise<List<List<EntityConfigurationStatement>>> = CoroutineScope(context = CoroutineName(NAME)).promise { | ||
| requestEntityStatement(partyBId, engine).run { | ||
| JsonMapper().mapEntityConfigurationStatement(this.await()).let { | ||
| if (it.authorityHints.isNullOrEmpty()) { | ||
| trustChain.add(it) | ||
| trustChains.add(trustChain.map { content -> content.copy() }) | ||
| trustChain.last().also { trustChain.remove(it) } | ||
| } else { | ||
| it.authorityHints?.forEach { hint -> | ||
| trustChain.add(it) | ||
| readAuthorityHints( | ||
| hint, | ||
| engine, | ||
| trustChains, | ||
| trustChain | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return@promise trustChains | ||
| } | ||
|
|
||
| fun fetchSubordinateStatements( | ||
| entityConfigurationStatementsList: List<List<EntityConfigurationStatement>>, | ||
| engine: HttpClientEngine | ||
| ): Promise<List<List<String>>> = CoroutineScope(context = CoroutineName(NAME)).promise { | ||
| val trustChains: MutableList<List<String>> = mutableListOf() | ||
| val trustChain: MutableList<String> = mutableListOf() | ||
| entityConfigurationStatementsList.forEach { entityConfigurationStatements -> | ||
| entityConfigurationStatements.forEach { it -> | ||
| it.metadata?.jsonObject?.get("federation_entity")?.jsonObject?.get("federation_fetch_endpoint")?.jsonPrimitive?.content.let { url -> | ||
| requestEntityStatement(url.toString(), engine).run { | ||
| trustChain.add(this.await()) | ||
| } | ||
| } | ||
| } | ||
| trustChains.add(trustChain.map { content -> content.substring(0) }) | ||
| trustChain.clear() | ||
| } | ||
| return@promise trustChains | ||
| } | ||
|
|
||
| fun validateTrustChains( | ||
| jwts: List<List<String>>, | ||
| knownTrustChainIds: List<String> | ||
| ): List<List<Any>> { | ||
| val trustChains: MutableList<List<Any>> = mutableListOf() | ||
| for(it in jwts) { | ||
| try { | ||
| trustChains.add(validateTrustChain(it, knownTrustChainIds)) | ||
| } catch (e: Exception) { | ||
| Logger.debug("TrustChainValidation", e.message.toString()) | ||
| } | ||
| } | ||
| return trustChains | ||
| } | ||
|
|
||
| @OptIn(ExperimentalJsExport::class) | ||
| private fun validateTrustChain(jwts: List<String>, knownTrustChainIds: List<String>): List<Any> { | ||
| val entityStatements = jwts.toMutableList() | ||
| val firstEntityConfiguration = | ||
| entityStatements.removeFirst().let { JsonMapper().mapEntityConfigurationStatement(it) } | ||
| val lastEntityConfiguration = | ||
| entityStatements.removeLast().let { JsonMapper().mapEntityConfigurationStatement(it) } | ||
| val subordinateStatements = entityStatements.map { JsonMapper().mapSubordinateStatement(it) } | ||
|
|
||
| if (firstEntityConfiguration.iss != firstEntityConfiguration.sub) { | ||
| throw IllegalArgumentException("Entity Configuration of the Trust Chain subject requires that iss is equal to sub") | ||
| } | ||
|
|
||
| if (firstEntityConfiguration.jwks.jsonObject["keys"]?.jsonArray?.any { verify(jwts[0], retrieveJwk(it)) } == false) { | ||
| throw IllegalArgumentException("Invalid signature") | ||
| } | ||
|
|
||
| subordinateStatements.forEachIndexed { index, current -> | ||
| val next = | ||
| if (index < subordinateStatements.size - 1) subordinateStatements[index + 1] else lastEntityConfiguration | ||
| val now = Date.now().toInt() / 1000 | ||
|
|
||
| if (current.iat > now) { | ||
| throw IllegalArgumentException("Invalid iat") | ||
| } | ||
|
|
||
| if (current.exp < now) { | ||
| throw IllegalArgumentException("Invalid exp") | ||
| } | ||
|
|
||
| when (next) { | ||
| is EntityConfigurationStatement -> | ||
| if (current.iss != next.sub) { | ||
| throw IllegalArgumentException("Entity Configuration of the Trust Chain subject requires that iss is equal to sub") | ||
| } else if (next.jwks.jsonObject["keys"]?.jsonArray?.any { verify(jwts[0], retrieveJwk(it)) } == false) { | ||
| throw IllegalArgumentException("Invalid signature") | ||
| } | ||
| is SubordinateStatement -> | ||
| if (current.iss != next.sub) { | ||
| throw IllegalArgumentException("Entity Configuration of the Trust Chain subject requires that iss is equal to sub") | ||
| } else if (next.jwks.jsonObject["keys"]?.jsonArray?.any { verify(jwts[0], retrieveJwk(it)) } == false) { | ||
| throw IllegalArgumentException("Invalid signature") | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (!knownTrustChainIds.contains(lastEntityConfiguration.iss)) { | ||
| throw IllegalArgumentException("Entity Configuration of the Trust Chain subject requires that iss is equal to the Entity Identifier of the Trust Anchor") | ||
| } | ||
| if (lastEntityConfiguration.jwks.jsonObject["keys"]?.jsonArray?.any { verify(jwts[jwts.size - 1], retrieveJwk(it)) } == false) { | ||
| throw IllegalArgumentException("Invalid signature") | ||
| } | ||
|
|
||
| val validTrustChain = mutableListOf<Any>() | ||
| validTrustChain.add(firstEntityConfiguration) | ||
| validTrustChain.addAll(subordinateStatements) | ||
| validTrustChain.add(lastEntityConfiguration) | ||
|
|
||
| return validTrustChain | ||
| } | ||
|
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| private fun retrieveJwk(key: JsonElement): Jwk { | ||
| return when (key) { | ||
| is JsonObject -> Jwk( | ||
| kid = key["kid"]?.jsonPrimitive?.content, | ||
| kty = key["kty"]?.jsonPrimitive?.content ?: "EC", | ||
| crv = key["crv"]?.jsonPrimitive?.content, | ||
| x = key["x"]?.jsonPrimitive?.content, | ||
| y = key["y"]?.jsonPrimitive?.content | ||
| ) | ||
| else -> throw IllegalArgumentException("Invalid key") | ||
| } | ||
| } | ||
|
|
||
| private fun requestEntityStatement(url: String, engine: HttpClientEngine): Promise<String> = | ||
| CoroutineScope(context = CoroutineName(NAME)).promise { | ||
| OidFederationClient(engine).fetchEntityStatement(url) | ||
| } | ||
| } |
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