Filling out embedded verifiable credential inspector.

inspector-vc/src/main/java/org/oneedtech/inspect/vc/EmbeddedVCInspector.java

@@ -1,13 +1,164 @@
 package org.oneedtech.inspect.vc;
 
+import static java.lang.Boolean.TRUE;
+
+import static org.oneedtech.inspect.core.probe.RunContext.Key.*;
+import static org.oneedtech.inspect.util.json.ObjectMapperCache.Config.DEFAULT;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 
 import org.oneedtech.inspect.core.SubInspector;
+import org.oneedtech.inspect.core.probe.GeneratedObject;
+import org.oneedtech.inspect.core.probe.Probe;
+import org.oneedtech.inspect.core.probe.RunContext;
+import org.oneedtech.inspect.core.probe.json.JsonPathEvaluator;
+import org.oneedtech.inspect.core.probe.json.JsonSchemaProbe;
 import org.oneedtech.inspect.core.report.Report;
+import org.oneedtech.inspect.core.report.ReportItems;
+import org.oneedtech.inspect.schema.SchemaKey;
+import org.oneedtech.inspect.util.json.ObjectMapperCache;
 import org.oneedtech.inspect.util.resource.Resource;
+import org.oneedtech.inspect.util.resource.UriResource;
+import org.oneedtech.inspect.util.resource.context.ResourceContext;
+import org.oneedtech.inspect.vc.Credential.Type;
+import org.oneedtech.inspect.vc.probe.CredentialParseProbe;
+import org.oneedtech.inspect.vc.probe.InlineJsonSchemaProbe;
+import org.oneedtech.inspect.vc.probe.SignatureVerifierProbe;
+import org.oneedtech.inspect.vc.probe.TypePropertyProbe;
 
-public class EmbeddedVCInspector {
+import com.fasterxml.jackson.databind.JsonNode;
-    //TODO: @Miles Need to confirm with Markus, but this feels like an embedded inspector with some different rules (type, etc..) like endorsements
+import com.fasterxml.jackson.databind.ObjectMapper;
 
+/**
+ * An inspector for EndorsementCredential objects. 
+ * @author mgylling
+ */
+public class EmbeddedVCInspector extends VCInspector implements SubInspector {
+
+	protected <B extends VCInspector.Builder<?>> EmbeddedVCInspector(B builder) {
+		super(builder);
+	}	
+
+	@Override
+	public Report run(Resource resource, Map<String, GeneratedObject> parentObjects) {
+		/*
+		 * The resource param is the top-level credential that embeds the endorsement, we
+		 * expect parentObjects to provide a pointer to the JsonNode we should check
+		 */
+		Credential verifiableCredential = (Credential) parentObjects.get(VC_KEY);
+		
+		ObjectMapper mapper = ObjectMapperCache.get(DEFAULT);
+		JsonPathEvaluator jsonPath = new JsonPathEvaluator(mapper);
+		
+		RunContext ctx = new RunContext.Builder()
+				.put(this)
+				.put(resource)
+				.put(JACKSON_OBJECTMAPPER, mapper)
+				.put(JSONPATH_EVALUATOR, jsonPath)
+				.put(VC_KEY, verifiableCredential)
+				.build();
+
+		List<ReportItems> accumulator = new ArrayList<>();
+		int probeCount = 0;
+
+        try {
+			//detect type (png, svg, json, jwt) and extract json data
+			probeCount++;
+			accumulator.add(new CredentialParseProbe().run(resource, ctx));				
+			if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
+
+			//we expect the above to place a generated object in the context				
+			Credential crd = ctx.getGeneratedObject(Credential.ID);
+			
+			//type property
+			probeCount++;
+			accumulator.add(new TypePropertyProbe(Type.ClrCredential).run(crd.getJson(), ctx));
+			if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
+		
+			//canonical schema and inline schema
+			SchemaKey schema = crd.getSchemaKey().orElseThrow();
+			for(Probe<JsonNode> probe : List.of(new JsonSchemaProbe(schema), new InlineJsonSchemaProbe(schema))) {					
+				probeCount++;
+				accumulator.add(probe.run(crd.getJson(), ctx));
+				if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
+			}
+			
+			//signatures, proofs
+			probeCount++;
+			if(crd.getJwt().isPresent()){
+				//The credential originally contained in a JWT, validate the jwt and external proof.
+				accumulator.add(new SignatureVerifierProbe().run(crd, ctx));
+			} else {
+				//The credential not contained in a jwt, must have an internal proof.
+				//TODO: @Miles Need to fix the issuer, Same as with outer CLR 
+				//Swap -> "verificationMethod": "https://example.edu/issuers/565049#z6MkwA1498JfoCS3y4y3zggBDAosQEoCi5gsYH2PMXh1cFWK",
+				//To be like -> "verificationMethod": "did:key:z6MkkUD3J14nkYzn46QeuaVSnp7dF85QJKwKvJvfsjx79aXj",
+				//...but also work properly which old record seems not be doing...
+				
+				/*
+				accumulator.add(new ProofVerifierProbe().run(crd, ctx));
+				*/		
 				
 			}
+			if(broken(accumulator)) return abort(ctx, accumulator, probeCount);
+
+			//check refresh service if we are not already refreshed
+			probeCount++;
+			if(resource.getContext().get(REFRESHED) != TRUE) {
+				Optional<String> newID = checkRefreshService(crd, ctx); 											
+				if(newID.isPresent()) {		
+					//TODO resource.type
+					return this.run(
+						new UriResource(new URI(newID.get()))
+							.setContext(new ResourceContext(REFRESHED, TRUE)));
+				}
+			}
+		
+		} catch (Exception e) {
+			//TODO: Need to figure out the issue here.
+			//accumulator.add(onProbeException(Probe.ID.NO_UNCAUGHT_EXCEPTIONS, resource, e));
+		}
+
+		return new Report(ctx, new ReportItems(accumulator), probeCount);
+	}
+
+	@Override
+	public <R extends Resource> Report run(R resource) {
+		throw new IllegalStateException("must use #run(resource, map)");
+	}
+	
+	public static class Builder extends VCInspector.Builder<EmbeddedVCInspector.Builder> {
+		@SuppressWarnings("unchecked")
+		@Override
+		public EmbeddedVCInspector build() {
+			return new EmbeddedVCInspector(this);
+		}
+	}
+	
+	public static final String VC_KEY = "VC_KEY";
+    private static final String REFRESHED = "is.refreshed.credential";
+
+		/**
+	 * If the AchievementCredential or EndorsementCredential has a “refreshService” property and the type of the 
+	 * RefreshService object is “1EdTechCredentialRefresh”, you should fetch the refreshed credential from the URL 
+	 * provided, then start the verification process over using the response as input. If the request fails, 
+	 * the credential is invalid.
+	 */
+	private Optional<String> checkRefreshService(Credential crd, RunContext ctx) {
+		JsonNode refreshServiceNode = crd.getJson().get("refreshService");		
+		if(refreshServiceNode != null) {
+			JsonNode serviceTypeNode = refreshServiceNode.get("type");
+			if(serviceTypeNode != null && serviceTypeNode.asText().equals("1EdTechCredentialRefresh")) {
+				JsonNode serviceURINode = refreshServiceNode.get("id");
+				if(serviceURINode != null) {
+					return Optional.of(serviceURINode.asText());
+				}
+			}	
+		}				
+		return Optional.empty();
+	}
+}