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js/xpconnect/wrappers/AccessCheck.h@6474c204b198 (annotated)

js/xpconnect/wrappers/AccessCheck.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0	2	/* vim: set ts=8 sts=4 et sw=4 tw=99: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#ifndef __AccessCheck_h__
michael@0	8	#define __AccessCheck_h__
michael@0	9
michael@0	10	#include "jswrapper.h"
michael@0	11	#include "js/Id.h"
michael@0	12
michael@0	13	class nsIPrincipal;
michael@0	14
michael@0	15	namespace xpc {
michael@0	16
michael@0	17	class AccessCheck {
michael@0	18	public:
michael@0	19	static bool subsumes(JSCompartment *a, JSCompartment *b);
michael@0	20	static bool subsumes(JSObject *a, JSObject *b);
michael@0	21	static bool wrapperSubsumes(JSObject *wrapper);
michael@0	22	static bool subsumesConsideringDomain(JSCompartment *a, JSCompartment *b);
michael@0	23	static bool isChrome(JSCompartment *compartment);
michael@0	24	static bool isChrome(JSObject *obj);
michael@0	25	static bool callerIsChrome();
michael@0	26	static nsIPrincipal *getPrincipal(JSCompartment *compartment);
michael@0	27	static bool isCrossOriginAccessPermitted(JSContext *cx, JSObject *obj, jsid id,
michael@0	28	js::Wrapper::Action act);
michael@0	29	};
michael@0	30
michael@0	31	struct Policy {
michael@0	32	};
michael@0	33
michael@0	34	// This policy allows no interaction with the underlying callable. Everything throws.
michael@0	35	struct Opaque : public Policy {
michael@0	36	static bool check(JSContext *cx, JSObject *wrapper, jsid id, js::Wrapper::Action act) {
michael@0	37	return false;
michael@0	38	}
michael@0	39	static bool deny(js::Wrapper::Action act, JS::HandleId id) {
michael@0	40	return false;
michael@0	41	}
michael@0	42	static bool allowNativeCall(JSContext *cx, JS::IsAcceptableThis test, JS::NativeImpl impl) {
michael@0	43	return false;
michael@0	44	}
michael@0	45	};
michael@0	46
michael@0	47	// Like the above, but allows CALL.
michael@0	48	struct OpaqueWithCall : public Policy {
michael@0	49	static bool check(JSContext *cx, JSObject *wrapper, jsid id, js::Wrapper::Action act) {
michael@0	50	return act == js::Wrapper::CALL;
michael@0	51	}
michael@0	52	static bool deny(js::Wrapper::Action act, JS::HandleId id) {
michael@0	53	return false;
michael@0	54	}
michael@0	55	static bool allowNativeCall(JSContext *cx, JS::IsAcceptableThis test, JS::NativeImpl impl) {
michael@0	56	return false;
michael@0	57	}
michael@0	58	};
michael@0	59
michael@0	60	// This policy is designed to protect privileged callers from untrusted non-
michael@0	61	// Xrayable objects. Nothing is allowed, and nothing throws.
michael@0	62	struct GentlyOpaque : public Policy {
michael@0	63	static bool check(JSContext *cx, JSObject *wrapper, jsid id, js::Wrapper::Action act) {
michael@0	64	return false;
michael@0	65	}
michael@0	66	static bool deny(js::Wrapper::Action act, JS::HandleId id) {
michael@0	67	return true;
michael@0	68	}
michael@0	69	static bool allowNativeCall(JSContext *cx, JS::IsAcceptableThis test, JS::NativeImpl impl) {
michael@0	70	// We allow nativeCall here because the alternative is throwing (which
michael@0	71	// happens in SecurityWrapper::nativeCall), which we don't want. There's
michael@0	72	// unlikely to be too much harm to letting this through, because this
michael@0	73	// wrapper is only used to wrap less-privileged objects in more-privileged
michael@0	74	// scopes, so unwrapping here only drops privileges.
michael@0	75	return true;
michael@0	76	}
michael@0	77	};
michael@0	78
michael@0	79	// This policy only permits access to properties that are safe to be used
michael@0	80	// across origins.
michael@0	81	struct CrossOriginAccessiblePropertiesOnly : public Policy {
michael@0	82	static bool check(JSContext *cx, JSObject *wrapper, jsid id, js::Wrapper::Action act) {
michael@0	83	return AccessCheck::isCrossOriginAccessPermitted(cx, wrapper, id, act);
michael@0	84	}
michael@0	85	static bool deny(js::Wrapper::Action act, JS::HandleId id) {
michael@0	86	// Silently fail for enumerate-like operations.
michael@0	87	if (act == js::Wrapper::ENUMERATE)
michael@0	88	return true;
michael@0	89	return false;
michael@0	90	}
michael@0	91	static bool allowNativeCall(JSContext *cx, JS::IsAcceptableThis test, JS::NativeImpl impl) {
michael@0	92	return false;
michael@0	93	}
michael@0	94	};
michael@0	95
michael@0	96	// This policy only permits access to properties if they appear in the
michael@0	97	// objects exposed properties list.
michael@0	98	struct ExposedPropertiesOnly : public Policy {
michael@0	99	static bool check(JSContext *cx, JSObject *wrapper, jsid id, js::Wrapper::Action act);
michael@0	100
michael@0	101	static bool deny(js::Wrapper::Action act, JS::HandleId id) {
michael@0	102	// Fail silently for GETs and ENUMERATEs.
michael@0	103	return act == js::Wrapper::GET || act == js::Wrapper::ENUMERATE;
michael@0	104	}
michael@0	105	static bool allowNativeCall(JSContext *cx, JS::IsAcceptableThis test, JS::NativeImpl impl);
michael@0	106	};
michael@0	107
michael@0	108	}
michael@0	109
michael@0	110	#endif /* __AccessCheck_h__ */