OID4VCI: Extract credential configuration id if set by issuer

Author: nodh

CHANGELOG.md

@@ -42,6 +42,7 @@ Release 5.6.4:
    - In `OAuth2Client.createAuthRequest()` rename `wrapAsPar` to `wrapAsJar` to match its semantics
  - OpenID for Verifiable Credential Issuance:
    - Sign authn request as JAR only when AS supports it
+   - Support extracting `credential_configuration_id` from server's authorization details
 
 Release 5.6.3:
  - OpenID for Verifiable Credential Issuance:

vck-openid/src/commonMain/kotlin/at/asitplus/wallet/lib/oidvci/WalletService.kt

@@ -61,7 +61,6 @@ class WalletService(
     data class KeyAttestationInput(val clientNonce: String?, val supportedAlgorithms: Collection<String>?)
 
 
-
     data class RequestOptions(
         /**
          * Credential type to request
@@ -215,10 +214,11 @@ class WalletService(
 
     private fun Set<AuthorizationDetails>.toCredentialRequest(): List<CredentialRequestParameters> =
         filterIsInstance<OpenIdAuthorizationDetails>().flatMap {
-            require(it.credentialIdentifiers != null) { "credential_identifiers are null" }
-            it.credentialIdentifiers!!.map {
-                CredentialRequestParameters(credentialIdentifier = it)
-            }
+            it.credentialIdentifiers?.let {
+                it.map { CredentialRequestParameters(credentialIdentifier = it) }
+            } ?: it.credentialConfigurationId?.let {
+                listOf(CredentialRequestParameters(credentialConfigurationId = it))
+            } ?: throw IllegalArgumentException("Authorization details can't be parsed: $it")
         }
 
     private fun String.toCredentialRequest(metadata: IssuerMetadata): Set<CredentialRequestParameters> =