Add JWKContext

Issue: gh-5330

oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/JWKContext.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2002-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.jwt;
+
+import com.nimbusds.jose.jwk.JWK;
+import com.nimbusds.jose.proc.SecurityContext;
+import org.springframework.util.Assert;
+
+import java.util.List;
+
+/**
+ * A {@link SecurityContext} that is used by {@link JWKContextJWKSource}.
+ *
+ * @author Rob Winch
+ * @since 5.1
+ * @see JWKContextJWKSource
+ */
+class JWKContext implements SecurityContext {
+	private final List<JWK> jwkList;
+
+	JWKContext(List<JWK> jwkList) {
+		Assert.notNull(jwkList, "jwkList cannot be null");
+		this.jwkList = jwkList;
+	}
+
+	public List<JWK> getJwkList() {
+		return this.jwkList;
+	}
+}

oauth2/oauth2-jose/src/test/java/org/springframework/security/oauth2/jwt/JWKContextTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2002-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.jwt;
+
+import com.nimbusds.jose.jwk.JWK;
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+
+/**
+ * @author Rob Winch
+ * @since 5.1
+ */
+public class JWKContextTests {
+
+	@Test
+	public void constructorWhenNullThenIllegalArgumentException() {
+		List<JWK> jwkList = null;
+		assertThatCode(() -> new JWKContext(jwkList))
+				.isInstanceOf(IllegalArgumentException.class);
+	}
+
+	@Test
+	public void getJwkListWhenEmpty() {
+		JWKContext jwkContext = new JWKContext(Collections.emptyList());
+		assertThat(jwkContext.getJwkList()).isEmpty();
+	}
+
+	@Test
+	public void getJwkListWhenNotEmpty() {
+		JWK key = mock(JWK.class);
+		JWKContext jwkContext = new JWKContext(Arrays.asList(key));
+		assertThat(jwkContext.getJwkList()).containsOnly(key);
+	}
+}