Adding the client cert attributes (#366)

* Adding the client cert attributes

* adding tests

Author: msailes

aws-lambda-java-events/src/main/java/com/amazonaws/services/lambda/runtime/events/apigateway/APIGatewayProxyRequestEvent.java

@@ -134,5 +134,32 @@ public static class RequestIdentity implements Serializable {
         private String user;
 
         private String accessKey;
+
+        private String principalOrgId;
+
+        private ClientCert clientCert;
+    }
+
+    @AllArgsConstructor
+    @Builder(setterPrefix = "with")
+    @Data
+    @NoArgsConstructor
+    public static class ClientCert {
+
+        private String clientCertPem;
+        private String issuerDN;
+        private String serialNumber;
+        private String subjectDN;
+        private Validity validity;
+    }
+
+    @AllArgsConstructor
+    @Builder(setterPrefix = "with")
+    @Data
+    @NoArgsConstructor
+    public static class Validity {
+
+        private String notAfter;
+        private String notBefore;
     }
 }

aws-lambda-java-events/src/test/resources/event_models/api_gateway_proxy_request_event.json

@@ -41,7 +41,18 @@
       "cognitoAuthenticationProvider": "",
       "userArn": "arn:aws:iam::123456789012:user/kdeding",
       "userAgent": "Apache-HttpClient/4.5.x (Java/1.8.0_131)",
-      "user": "AIDAJTIRKKKER4HCKVJZG"
+      "user": "AIDAJTIRKKKER4HCKVJZG",
+      "principalOrgId": "",
+      "clientCert": {
+        "clientCertPem": "CERT_CONTENT",
+        "subjectDN": "www.example.com",
+        "issuerDN": "Example issuer",
+        "serialNumber": "a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1:a1",
+        "validity": {
+          "notBefore": "May 28 12:30:02 2019 GMT",
+          "notAfter": "Aug  5 09:36:04 2021 GMT"
+        }
+      }
     },
     "path": "/my/path",
     "protocol": "HTTP/1.1",