Add missing address for signup event (#8469)

Author: manuel-alvarez-alvarez

dd-java-agent/appsec/src/main/java/com/datadog/appsec/event/data/KnownAddresses.java

@@ -133,6 +133,9 @@ public interface KnownAddresses {
   /** Login success business event */
   Address<String> LOGIN_SUCCESS = new Address<>("server.business_logic.users.login.success");
 
+  /** Signup business event */
+  Address<String> SIGN_UP = new Address<>("server.business_logic.users.signup");
+
   /** The Exec command being executed */
   Address<String> EXEC_CMD = new Address<>("server.sys.exec.cmd");
 
@@ -215,6 +218,8 @@ static Address<?> forName(String name) {
         return LOGIN_SUCCESS;
       case "server.business_logic.users.login.failure":
         return LOGIN_FAILURE;
+      case "server.business_logic.users.signup":
+        return SIGN_UP;
       case "server.sys.exec.cmd":
         return EXEC_CMD;
       case "server.sys.shell.cmd":

dd-java-agent/appsec/src/main/java/com/datadog/appsec/gateway/GatewayBridge.java

@@ -77,6 +77,7 @@ public class GatewayBridge {
   static {
     EVENT_MAPPINGS.put(LoginEvent.LOGIN_SUCCESS, KnownAddresses.LOGIN_SUCCESS);
     EVENT_MAPPINGS.put(LoginEvent.LOGIN_FAILURE, KnownAddresses.LOGIN_FAILURE);
+    EVENT_MAPPINGS.put(LoginEvent.SIGN_UP, KnownAddresses.SIGN_UP);
   }
 
   private static final String METASTRUCT_EXPLOIT = "exploit";

dd-java-agent/appsec/src/test/groovy/com/datadog/appsec/event/data/KnownAddressesSpecification.groovy

@@ -40,6 +40,7 @@ class KnownAddressesSpecification extends Specification {
       'usr.session_id',
       'server.business_logic.users.login.failure',
       'server.business_logic.users.login.success',
+      'server.business_logic.users.signup',
       'server.io.net.url',
       'server.io.fs.file',
       'server.sys.exec.cmd',
@@ -50,7 +51,7 @@ class KnownAddressesSpecification extends Specification {
 
   void 'number of known addresses is expected number'() {
     expect:
-    Address.instanceCount() == 38
+    Address.instanceCount() == 39
     KnownAddresses.WAF_CONTEXT_PROCESSOR.serial == Address.instanceCount() - 1
   }
 }

dd-java-agent/appsec/src/test/groovy/com/datadog/appsec/gateway/GatewayBridgeSpecification.groovy

@@ -1082,6 +1082,7 @@ class GatewayBridgeSpecification extends DDSpecification {
     then:
     1 * eventDispatcher.publishDataEvent(nonEmptyDsInfo, ctx.data, _ as DataBundle, _ as GatewayContext) >> { a, b, DataBundle db, GatewayContext gw ->
       assert db.get(KnownAddresses.USER_LOGIN) == USER_ID
+      assert db.get(KnownAddresses.SIGN_UP) != null
       assert !gw.isTransient
       return NoopFlow.INSTANCE
     }