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VerificationUseCase.kt
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VerificationUseCase.kt
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package id.walt.verifier.oidc
import COSE.AlgorithmID
import id.walt.credentials.verification.models.PolicyRequest
import id.walt.credentials.verification.models.PolicyRequest.Companion.parsePolicyRequests
import id.walt.credentials.verification.policies.JwtSignaturePolicy
import id.walt.crypto.keys.KeyGenerationRequest
import id.walt.crypto.keys.KeyManager
import id.walt.crypto.keys.KeyType
import id.walt.mdoc.COSECryptoProviderKeyInfo
import id.walt.oid4vc.data.ClientIdScheme
import id.walt.oid4vc.data.OpenId4VPProfile
import id.walt.oid4vc.data.ResponseMode
import id.walt.oid4vc.data.ResponseType
import id.walt.oid4vc.data.dif.PresentationDefinition
import id.walt.oid4vc.providers.PresentationSession
import id.walt.oid4vc.responses.TokenResponse
import id.walt.sdjwt.JWTCryptoProvider
import io.github.oshai.kotlinlogging.KotlinLogging
import io.ktor.client.*
import io.ktor.client.request.*
import io.ktor.http.*
import kotlinx.coroutines.runBlocking
import kotlinx.serialization.encodeToString
import kotlinx.serialization.json.*
import java.security.KeyFactory
import java.security.cert.CertificateFactory
import java.security.cert.X509Certificate
import java.security.spec.PKCS8EncodedKeySpec
import java.security.spec.X509EncodedKeySpec
import java.util.*
import kotlin.collections.set
class VerificationUseCase(
val http: HttpClient, cryptoProvider: JWTCryptoProvider
) {
private val logger = KotlinLogging.logger {}
fun createSession(
vpPoliciesJson: JsonElement?,
vcPoliciesJson: JsonElement?,
requestCredentialsJson: JsonElement,
presentationDefinitionJson: JsonElement?,
responseMode: ResponseMode,
responseType: ResponseType? = ResponseType.VpToken,
successRedirectUri: String?,
errorRedirectUri: String?,
statusCallbackUri: String?,
statusCallbackApiKey: String?,
stateId: String?,
walletInitiatedAuthState: String? = null,
openId4VPProfile: OpenId4VPProfile = OpenId4VPProfile.DEFAULT
) = let {
val vpPolicies = vpPoliciesJson?.jsonArray?.parsePolicyRequests() ?: listOf(PolicyRequest(JwtSignaturePolicy()))
val vcPolicies = vcPoliciesJson?.jsonArray?.parsePolicyRequests() ?: listOf(PolicyRequest(JwtSignaturePolicy()))
val requestCredentialsArr = requestCredentialsJson.jsonArray
val requestedTypes = requestCredentialsArr.map {
when (it) {
is JsonPrimitive -> it.contentOrNull
is JsonObject -> it["credential"]?.jsonPrimitive?.contentOrNull
else -> throw IllegalArgumentException("Invalid JSON type for requested credential: $it")
} ?: throw IllegalArgumentException("Invalid VC type for requested credential: $it")
}
val presentationDefinition =
(presentationDefinitionJson?.let { PresentationDefinition.fromJSON(it.jsonObject) })
?: PresentationDefinition.primitiveGenerationFromVcTypes(requestedTypes, openId4VPProfile)
logger.debug { "Presentation definition: " + presentationDefinition.toJSON() }
val session = OIDCVerifierService.initializeAuthorization(
presentationDefinition, responseMode = responseMode, sessionId = stateId,
ephemeralEncKey = when(responseMode) {
ResponseMode.direct_post_jwt -> runBlocking { KeyManager.createKey(KeyGenerationRequest(keyType = KeyType.secp256r1)) }
else -> null
},
clientIdScheme = this.getClientIdScheme(openId4VPProfile, OIDCVerifierService.config.defaultClientIdScheme),
openId4VPProfile = openId4VPProfile,
walletInitiatedAuthState = walletInitiatedAuthState,
responseType = responseType
)
val specificPolicies = requestCredentialsArr.filterIsInstance<JsonObject>().associate {
(it["credential"]
?: throw IllegalArgumentException("No `credential` name supplied, in `request_credentials`.")).jsonPrimitive.content to (it["policies"]
?: throw IllegalArgumentException("No `policies` supplied, in `request_credentials`.")).jsonArray.parsePolicyRequests()
}
OIDCVerifierService.sessionVerificationInfos[session.id] = OIDCVerifierService.SessionVerificationInformation(
vpPolicies = vpPolicies,
vcPolicies = vcPolicies,
specificPolicies = specificPolicies,
successRedirectUri = successRedirectUri,
errorRedirectUri = errorRedirectUri,
walletInitiatedAuthState = walletInitiatedAuthState,
statusCallback = statusCallbackUri?.let {
OIDCVerifierService.StatusCallback(
statusCallbackUri = it,
statusCallbackApiKey = statusCallbackApiKey,
)
}
)
session
}
fun getSession(sessionId: String): PresentationSession {
return sessionId.let { OIDCVerifierService.getSession(it) }!!
}
fun verify(sessionId: String?, tokenResponseParameters: Map<String, List<String>>): Result<String> {
logger.debug { "Verifying session $sessionId" }
val session = sessionId?.let { OIDCVerifierService.getSession(it) }
?: return Result.failure(Exception("State parameter doesn't refer to an existing session, or session expired"))
val tokenResponse = when(TokenResponse.isDirectPostJWT(tokenResponseParameters)) {
true -> TokenResponse.fromDirectPostJWT(tokenResponseParameters, runBlocking { session.ephemeralEncKey?.exportJWKObject() } ?: throw IllegalArgumentException("No ephemeral reader key found on session") )
else -> TokenResponse.fromHttpParameters(tokenResponseParameters)
}
val sessionVerificationInfo = OIDCVerifierService.sessionVerificationInfos[session.id] ?: return Result.failure(
IllegalStateException("No session verification information found for session id!")
)
val maybePresentationSessionResult = runCatching { OIDCVerifierService.verify(tokenResponse, session) }
if (maybePresentationSessionResult.getOrNull() != null) {
val presentationSession = maybePresentationSessionResult.getOrThrow()
if (presentationSession.verificationResult == true) {
val redirectUri = sessionVerificationInfo.successRedirectUri?.replace("\$id", session.id) ?: ""
return Result.success(redirectUri)
} else {
val policyResults = OIDCVerifierService.policyResults[session.id]
val redirectUri = sessionVerificationInfo.errorRedirectUri?.replace("\$id", session.id)
if (redirectUri != null) {
return Result.failure(Exception(redirectUri))
}
return if (policyResults == null) {
Result.failure(Exception("Verification policies did not succeed"))
} else {
val failedPolicies =
policyResults.results.flatMap { it.policyResults.map { it } }.filter { it.result.isFailure }
Result.failure(Exception("Verification policies did not succeed: ${failedPolicies.joinToString { it.request.policy.name }}"))
}
}
} else {
return Result.failure(Exception("Verification failed"))
}
}
fun getResult(sessionId: String): Result<String> {
val session = OIDCVerifierService.getSession(sessionId)
?: return Result.failure(IllegalArgumentException("Invalid id provided (expired?): $sessionId"))
val policyResults = OIDCVerifierService.policyResults[session.id]
return Result.success(
Json { prettyPrint = true }.encodeToString(
PresentationSessionInfo.fromPresentationSession(
session, policyResults?.toJson()
)
)
)
}
fun getPresentationDefinition(sessionId: String): Result<PresentationDefinition> =
OIDCVerifierService.getSession(sessionId)?.presentationDefinition?.let {
Result.success(it)
} ?: Result.failure(error("Invalid id provided (expired?): $sessionId"))
fun getSignedAuthorizationRequestObject(sessionId: String): Result<String> =
OIDCVerifierService.getSession(sessionId)?.authorizationRequest?.let {
Result.success(it.toRequestObject(RequestSigningCryptoProvider, RequestSigningCryptoProvider.signingKey.keyID.orEmpty()))
} ?: Result.failure(error("Invalid id provided (expired?): $sessionId"))
suspend fun notifySubscribers(sessionId: String) = runCatching {
OIDCVerifierService.sessionVerificationInfos[sessionId]?.statusCallback?.let {
http.post(it.statusCallbackUri) {
header(HttpHeaders.ContentType, ContentType.Application.Json)
it.statusCallbackApiKey?.let { bearerAuth(it) }
setBody(getResult(sessionId).getOrThrow())
}.also {
logger.debug { "status callback: ${it.status}" }
}
}
}
fun getClientIdScheme(openId4VPProfile: OpenId4VPProfile, defaultClientIdScheme: ClientIdScheme): ClientIdScheme {
return when(openId4VPProfile) {
OpenId4VPProfile.ISO_18013_7_MDOC -> ClientIdScheme.X509SanDns
else -> defaultClientIdScheme
}
}
}
object LspPotentialInteropEvent {
val POTENTIAL_ROOT_CA_CERT = "-----BEGIN CERTIFICATE-----\n" +
"MIIBQzCB66ADAgECAgjbHnT+6LsrbDAKBggqhkjOPQQDAjAYMRYwFAYDVQQDDA1NRE9DIFJPT1QgQ1NQMB4XDTI0MDUwMjEzMTMzMFoXDTI0MDUwMzEzMTMzMFowFzEVMBMGA1UEAwwMTURPQyBST09UIENBMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEWP0sG+CkjItZ9KfM3sLF+rLGb8HYCfnlsIH/NWJjiXkTx57ryDLYfTU6QXYukVKHSq6MEebvQPqTJT1blZ/xeKMgMB4wDAYDVR0TAQH/BAIwADAOBgNVHQ8BAf8EBAMCAQYwCgYIKoZIzj0EAwIDRwAwRAIgWM+JtnhdqbTzFD1S3byTvle0n/6EVALbkKCbdYGLn8cCICOoSETqwk1oPnJEEPjUbdR4txiNqkHQih8HKAQoe8t5\n" +
"-----END CERTIFICATE-----\n"
val POTENTIAL_ROOT_CA_PRIV = "-----BEGIN PRIVATE KEY-----\n" +
"MEECAQAwEwYHKoZIzj0CAQYIKoZIzj0DAQcEJzAlAgEBBCBXPx4eVTypvm0pQkFdqVXlORn+YIFNb+Hs5xvmG3EM8g==\n" +
"-----END PRIVATE KEY-----\n"
val POTENTIAL_ROOT_CA_PUB = "-----BEGIN PUBLIC KEY-----\n" +
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEWP0sG+CkjItZ9KfM3sLF+rLGb8HYCfnlsIH/NWJjiXkTx57ryDLYfTU6QXYukVKHSq6MEebvQPqTJT1blZ/xeA==\n" +
"-----END PUBLIC KEY-----\n"
val POTENTIAL_ISSUER_CERT = "-----BEGIN CERTIFICATE-----\n" +
"MIIBRzCB7qADAgECAgg57ch6mnj5KjAKBggqhkjOPQQDAjAXMRUwEwYDVQQDDAxNRE9DIFJPT1QgQ0EwHhcNMjQwNTAyMTMxMzMwWhcNMjUwNTAyMTMxMzMwWjAbMRkwFwYDVQQDDBBNRE9DIFRlc3QgSXNzdWVyMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEG0RINBiF+oQUD3d5DGnegQuXenI29JDaMGoMvioKRBN53d4UazakS2unu8BnsEtxutS2kqRhYBPYk9RAriU3gaMgMB4wDAYDVR0TAQH/BAIwADAOBgNVHQ8BAf8EBAMCB4AwCgYIKoZIzj0EAwIDSAAwRQIhAI5wBBAA3ewqIwslhuzFn4rNFW9dkz2TY7xeImO7CraYAiAYhai1NzJ6abAiYg8HxcRdYpO4bu2Sej8E6CzFHK34Yw==\n" +
"-----END CERTIFICATE-----"
val POTENTIAL_ISSUER_PUB = "-----BEGIN PUBLIC KEY-----\n" +
"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEG0RINBiF+oQUD3d5DGnegQuXenI29JDaMGoMvioKRBN53d4UazakS2unu8BnsEtxutS2kqRhYBPYk9RAriU3gQ==\n" +
"-----END PUBLIC KEY-----\n"
val POTENTIAL_ISSUER_PRIV = "-----BEGIN PRIVATE KEY-----\n" +
"MEECAQAwEwYHKoZIzj0CAQYIKoZIzj0DAQcEJzAlAgEBBCAoniTdVyXlKP0x+rius1cGbYyg+hjf8CT88hH8SCwWFA==\n" +
"-----END PRIVATE KEY-----\n"
val POTENTIAL_ISSUER_KEY_ID = "potential-lsp-issuer-key-01"
val POTENTIAL_ISSUER_CRYPTO_PROVIDER_INFO = loadPotentialIssuerKeys()
fun readKeySpec(pem: String): ByteArray {
val publicKeyPEM = pem
.replace("-----BEGIN PUBLIC KEY-----", "")
.replace("-----BEGIN PRIVATE KEY-----", "")
.replace(System.lineSeparator().toRegex(), "")
.replace("-----END PUBLIC KEY-----", "")
.replace("-----END PRIVATE KEY-----", "")
return Base64.getDecoder().decode(publicKeyPEM)
}
fun loadPotentialIssuerKeys(): COSECryptoProviderKeyInfo {
val factory = CertificateFactory.getInstance("X.509")
val rootCaCert = (factory.generateCertificate(POTENTIAL_ROOT_CA_CERT.byteInputStream())) as X509Certificate
val issuerCert = (factory.generateCertificate(POTENTIAL_ISSUER_CERT.byteInputStream())) as X509Certificate
val issuerPub = KeyFactory.getInstance("EC").generatePublic(X509EncodedKeySpec(readKeySpec(POTENTIAL_ISSUER_PUB)))
val issuerPriv = KeyFactory.getInstance("EC").generatePrivate(PKCS8EncodedKeySpec(readKeySpec(POTENTIAL_ISSUER_PRIV)))
return COSECryptoProviderKeyInfo(POTENTIAL_ISSUER_KEY_ID, AlgorithmID.ECDSA_256, issuerPub, issuerPriv, listOf(issuerCert), listOf(rootCaCert))
}
}