Does Google App Engine Standard Environment support config the Security Manager?

[Xin Meng via StackOverflow]

Does Google App Engine Standard Environment support config the Security Manager?

For example: add java policy file.

The reason for this question is that when I use santuario xmlsec dependency from 2.0.3 to latest. Always get an exception of Access Deny and the I got some suggestions to grant permission for the specific jar.

Caused by: java.security.AccessControlException: access denied ("java.security.SecurityPermission" "org.apache.xml.security.register")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
at java.security.AccessController.checkPermission(AccessController.java:884)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:445)
at org.apache.xml.security.utils.JavaUtils.checkRegisterPermission(JavaUtils.java:249)
at org.apache.xml.security.utils.ElementProxy.setDefaultPrefix(ElementProxy.java:475)
at org.apache.xml.security.utils.ElementProxy.registerDefaultPrefixes(ElementProxy.java:498)
at org.apache.xml.security.Init$2.run(Init.java:122)
at org.apache.xml.security.Init$2.run(Init.java:117)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.xml.security.Init.dynamicInit(Init.java:117)
at org.apache.xml.security.Init.init(Init.java:94)
at org.opensaml.xmlsec.signature.impl.SignatureMarshaller.<init>(SignatureMarshaller.java:55)
... 108 more

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