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extensionSystem: Check metadata types

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We currently check that an extension provides required metadata
properties, but then assume that all properties have the expected
type.

It turns out that this is putting too much trust in extensions,
so add an appropriate check.

https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5347

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2272>
This commit is contained in:
Florian Müllner 2022-04-20 19:29:19 +02:00 • committed by Marge Bot
parent 6df0002b29
commit 56d0b6d831
1 changed files with 20 additions and 2 deletions
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22
js/ui/extensionSystem.js
View file

@ -310,11 +310,29 @@ var ExtensionManager = class {
throw new Error(`Failed to parse metadata.json: ${e}`);
}
let requiredProperties = ['uuid', 'name', 'description', 'shell-version'];
const requiredProperties = [{
prop: 'uuid',
typeName: 'string',
}, {
prop: 'name',
typeName: 'string',
}, {
prop: 'description',
typeName: 'string',
}, {
prop: 'shell-version',
typeName: 'string array',
typeCheck: v => Array.isArray(v) && v.length > 0 && v.every(e => typeof e === 'string'),
}];
for (let i = 0; i < requiredProperties.length; i++) {
let prop = requiredProperties[i];
const {
prop, typeName, typeCheck = v => typeof v === typeName,
} = requiredProperties[i];
if (!meta[prop])
throw new Error(`missing "${prop}" property in metadata.json`);
if (!typeCheck(meta[prop]))
throw new Error(`property "${prop}" is not of type ${typeName}`);
}
if (uuid != meta.uuid)