added "none" to discovery endpoint

Author: jricher

openid-connect-server/src/main/java/org/mitre/discovery/web/DiscoveryEndpoint.java

@@ -261,6 +261,7 @@ OPTIONAL. JSON array containing a list of the JWS signing algorithms (alg values
 Collection<JWSAlgorithm> serverSigningAlgs = signService.getAllSigningAlgsSupported();
 Collection<JWSAlgorithm> clientSymmetricSigningAlgs = Lists.newArrayList(JWSAlgorithm.HS256, JWSAlgorithm.HS384, JWSAlgorithm.HS512);
 Collection<JWSAlgorithm> clientSymmetricAndAsymmetricSigningAlgs = Lists.newArrayList(JWSAlgorithm.HS256, JWSAlgorithm.HS384, JWSAlgorithm.HS512, JWSAlgorithm.RS256, JWSAlgorithm.RS384, JWSAlgorithm.RS512);
+Collection<Algorithm> clientSymmetricAndAsymmetricSigningAlgsWithNone = Lists.newArrayList(JWSAlgorithm.HS256, JWSAlgorithm.HS384, JWSAlgorithm.HS512, JWSAlgorithm.RS256, JWSAlgorithm.RS384, JWSAlgorithm.RS512, JWSAlgorithm.NONE);
 
 Map<String, Object> m = new HashMap<String, Object>();
 m.put("issuer", config.getIssuer());
@@ -279,7 +280,7 @@ OPTIONAL. JSON array containing a list of the JWS signing algorithms (alg values
 m.put("userinfo_signing_alg_values_supported", Collections2.transform(clientSymmetricAndAsymmetricSigningAlgs, toAlgorithmName));
 m.put("userinfo_encryption_alg_values_supported", Collections2.transform(encService.getAllEncryptionAlgsSupported(), toAlgorithmName));
 m.put("userinfo_encryption_enc_values_supported", Collections2.transform(encService.getAllEncryptionEncsSupported(), toAlgorithmName));
-m.put("id_token_signing_alg_values_supported", Collections2.transform(clientSymmetricAndAsymmetricSigningAlgs, toAlgorithmName));
+m.put("id_token_signing_alg_values_supported", Collections2.transform(clientSymmetricAndAsymmetricSigningAlgsWithNone, toAlgorithmName));
 m.put("id_token_encryption_alg_values_supported", Collections2.transform(encService.getAllEncryptionAlgsSupported(), toAlgorithmName));
 m.put("id_token_encryption_enc_values_supported", Collections2.transform(encService.getAllEncryptionEncsSupported(), toAlgorithmName));
 m.put("request_object_signing_alg_values_supported", Collections2.transform(clientSymmetricAndAsymmetricSigningAlgs, toAlgorithmName));