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test.js
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'use strict'
var test = require('tape')
var html = require('hast-util-to-html')
var h = require('hastscript')
var s = require('hastscript/svg')
var u = require('unist-builder')
var merge = require('deepmerge')
var gh = require('./lib/github')
var sanitize = require('.')
/* eslint-disable no-script-url, max-params */
test('sanitize()', function (t) {
t.test('non-node', function (t) {
t.equal(html(sanitize(true)), '', 'should ignore non-nodes (#1)')
t.equal(html(sanitize(null)), '', 'should ignore non-nodes (#2)')
t.equal(html(sanitize(1)), '', 'should ignore non-nodes (#3)')
t.equal(html(sanitize([])), '', 'should ignore non-nodes (#4)')
t.end()
})
t.test('unknown nodes', function (t) {
t.equal(
html(sanitize(u('unknown', '<xml></xml>'))),
'',
'should ignore unknown nodes'
)
t.end()
})
t.test('ignored nodes', function (t) {
t.equal(html(sanitize(u('raw', '<xml></xml>'))), '', 'should ignore `raw`')
t.equal(
html(sanitize(u('directive', {name: '!alpha'}, '!alpha bravo'))),
'',
'should ignore declaration `directive`s'
)
t.equal(
html(sanitize(u('directive', {name: '?xml'}, '?xml version="1.0"'))),
'',
'should ignore processing instruction `directive`s'
)
t.equal(
html(sanitize(u('characterData', 'alpha'))),
'',
'should ignore `characterData`s'
)
t.end()
})
t.test('`comment`', function (t) {
t.equal(
html(sanitize(u('comment', 'alpha'))),
'',
'should ignore `comment`s by default'
)
t.equal(
html(sanitize(u('comment', 'alpha'), {allowComments: true})),
'<!--alpha-->',
'should allow `comment`s with `allowComments: true`'
)
t.equal(
html(sanitize(u('comment', {toString: toString}), {allowComments: true})),
'<!---->',
'should ignore non-string `value`s with `allowComments: true`'
)
t.equal(
html(
sanitize(u('comment', 'alpha--><script>alert(1)</script><!--bravo'), {
allowComments: true
})
),
'<!--alpha-->',
'should not break out of comments with `allowComments: true`'
)
t.end()
})
t.test('`doctype`', function (t) {
t.equal(
html(sanitize(u('doctype', {name: 'html'}, 'alpha'))),
'',
'should ignore `doctype`s by default'
)
t.equal(
html(
sanitize(u('doctype', {name: 'html'}, 'alpha'), {allowDoctypes: true})
),
'<!doctype html>',
'should allow `doctype`s with `allowDoctypes: true`'
)
t.end()
})
t.test('`text`', function (t) {
t.deepEqual(
sanitize({
type: 'text',
tagName: 'div',
value: 'alert(1)',
unknown: 'alert(1)',
properties: {href: 'javascript:alert(1)'},
children: [h('script', 'alert(1)')],
data: {href: 'alert(1)'},
position: {
start: {line: 1, column: 1},
end: {line: 2, column: 1}
}
}),
{
type: 'text',
value: 'alert(1)',
data: {href: 'alert(1)'},
position: {
start: {line: 1, column: 1},
end: {line: 2, column: 1}
}
},
'should allow known properties'
)
t.equal(
html(sanitize(u('text', 'alert(1)'))),
'alert(1)',
'should allow `text`'
)
t.equal(
html(sanitize(u('text', {toString: toString}))),
'',
'should ignore non-string `value`s'
)
t.equal(
html(sanitize(h('script', u('text', 'alert(1)')))),
'',
'should ignore `text` in `script` elements'
)
t.equal(
html(sanitize(h('style', u('text', 'alert(1)')))),
'alert(1)',
'should show `text` in `style` elements'
)
t.end()
})
t.test('`element`', function (t) {
t.deepEqual(
sanitize({
type: 'element',
tagName: 'div',
value: 'alert(1)',
unknown: 'alert(1)',
properties: {href: 'javascript:alert(1)'},
children: [h('script', 'alert(1)')],
data: {href: 'alert(1)'},
position: {
start: {line: 1, column: 1},
end: {line: 2, column: 1}
}
}),
{
type: 'element',
tagName: 'div',
properties: {},
children: [],
data: {href: 'alert(1)'},
position: {
start: {line: 1, column: 1},
end: {line: 2, column: 1}
}
},
'should allow known properties'
)
t.deepEqual(
sanitize(h('unknown', u('text', 'alert(1)'))),
u('text', 'alert(1)'),
'should ignore unknown elements'
)
t.deepEqual(
sanitize({
type: 'element',
properties: {},
children: [u('text', 'alert(1)')]
}),
u('text', 'alert(1)'),
'should ignore elements without name'
)
t.deepEqual(
sanitize({type: 'element', tagName: 'div'}),
h(),
'should support elements without children / properties'
)
t.deepEqual(
sanitize(h('unknown', [])),
u('root', []),
'should always return a valid node (#1)'
)
t.deepEqual(
sanitize(h('script', [])),
u('root', []),
'should always return a valid node (#2)'
)
t.deepEqual(
sanitize(h('div', h('style', [u('text', '1'), u('text', '2')]))),
h('div', [u('text', '1'), u('text', '2')]),
'should always return a valid node (#3)'
)
t.deepEqual(
sanitize(h('unknown', [u('text', 'value')])),
u('text', 'value'),
'should always return a valid node (#4)'
)
t.deepEqual(
sanitize(h('unknown', [u('text', '1'), u('text', '2')])),
u('root', [u('text', '1'), u('text', '2')]),
'should always return a valid node (#5)'
)
t.deepEqual(
sanitize(h('div', {alt: 'alpha'})),
h('div', {alt: 'alpha'}),
'should allow known generic properties'
)
t.deepEqual(
sanitize(h('a', {href: '#heading'})),
h('a', {href: '#heading'}),
'should allow specific properties'
)
t.deepEqual(
sanitize(h('img', {href: '#heading'})),
h('img'),
'should ignore mismatched specific properties'
)
t.deepEqual(
sanitize(h('div', {dataFoo: 'bar'})),
h('div'),
'should ignore unspecified properties'
)
t.deepEqual(
sanitize(h('div', {dataFoo: 'bar'})),
h('div'),
'should ignore unspecified properties'
)
t.deepEqual(
sanitize(
h('div', {dataFoo: 'bar'}),
merge(gh, {attributes: {'*': ['data*']}})
),
h('div', {dataFoo: 'bar'}),
'should allow `data*`'
)
t.deepEqual(
sanitize(h('img', {alt: 'hello'})),
h('img', {alt: 'hello'}),
'should allow `string`s'
)
t.deepEqual(
sanitize(h('img', {alt: true})),
h('img', {alt: true}),
'should allow `boolean`s'
)
t.deepEqual(
sanitize(h('img', {alt: 1})),
h('img', {alt: 1}),
'should allow `number`s'
)
t.deepEqual(
sanitize(u('element', {tagName: 'img', properties: {alt: null}})),
h('img'),
'should ignore `null`'
)
t.deepEqual(
sanitize(u('element', {tagName: 'img', properties: {alt: undefined}})),
h('img'),
'should ignore `undefined`'
)
t.deepEqual(
sanitize(h('div', {id: 'getElementById'})),
h('div', {id: 'user-content-getElementById'}),
'should prevent clobbering (#1)'
)
t.deepEqual(
sanitize(h('div', {name: 'getElementById'})),
h('div', {name: 'user-content-getElementById'}),
'should prevent clobbering (#2)'
)
t.deepEqual(
sanitize(
u('element', {tagName: 'img', properties: {alt: {toString: toString}}})
),
h('img'),
'should ignore objects'
)
t.deepEqual(
sanitize(
u('element', {
tagName: 'img',
properties: {alt: [1, true, 'three', [4], {toString: toString}]}
})
),
h('img', {alt: [1, true, 'three']}),
'should supports arrays'
)
t.deepEqual(
sanitize(s('svg', {viewBox: '0 0 50 50'}, '!')),
u('text', '!'),
'should ignore `svg` elements'
)
t.test('href`', function (t) {
testAllURLs(t, 'a', 'href', {
valid: {
anchor: '#heading',
relative: '/file.html',
search: 'example.com?foo:bar',
hash: 'example.com#foo:bar',
'protocol-less': 'www.example.com',
mailto: 'mailto:foo@bar.com',
https: 'http://example.com',
http: 'http://example.com'
},
invalid: {
javascript: 'javascript:alert(1)',
whitespace: ' javascript:while(1){}',
'Unicode LS/PS I': '\u2028javascript:alert(1)',
'Unicode Whitespace (#1)': ' javascript:alert(1)',
'Unicode Whitespace (#2)': ' javascript:alert(1)',
'infinity loop': 'javascript:while(1){}',
'data URL': 'data:,evilnastystuff'
}
})
t.end()
})
t.test('`cite`', function (t) {
testAllURLs(t, 'blockquote', 'cite', {
valid: {
anchor: '#heading',
relative: '/file.html',
search: 'example.com?foo:bar',
hash: 'example.com#foo:bar',
'protocol-less': 'www.example.com',
https: 'http://example.com',
http: 'http://example.com'
},
invalid: {
mailto: 'mailto:foo@bar.com',
javascript: 'javascript:alert(1)',
'Unicode LS/PS I': '\u2028javascript:alert(1)',
'Unicode Whitespace (#1)': ' javascript:alert(1)',
'Unicode Whitespace (#2)': ' javascript:alert(1)',
'infinity loop': 'javascript:while(1){}',
'data URL': 'data:,evilnastystuff'
}
})
t.end()
})
t.test('`src`', function (t) {
testAllURLs(t, 'img', 'src', {
valid: {
anchor: '#heading',
relative: '/file.html',
search: 'example.com?foo:bar',
hash: 'example.com#foo:bar',
'protocol-less': 'www.example.com',
https: 'http://example.com',
http: 'http://example.com'
},
invalid: {
mailto: 'mailto:foo@bar.com',
javascript: 'javascript:alert(1)',
'Unicode LS/PS I': '\u2028javascript:alert(1)',
'Unicode Whitespace (#1)': ' javascript:alert(1)',
'Unicode Whitespace (#2)': ' javascript:alert(1)',
'infinity loop': 'javascript:while(1){}',
'data URL': 'data:,evilnastystuff'
}
})
t.end()
})
t.test('`longDesc`', function (t) {
testAllURLs(t, 'img', 'longDesc', {
valid: {
anchor: '#heading',
relative: '/file.html',
search: 'example.com?foo:bar',
hash: 'example.com#foo:bar',
'protocol-less': 'www.example.com',
https: 'http://example.com',
http: 'http://example.com'
},
invalid: {
mailto: 'mailto:foo@bar.com',
javascript: 'javascript:alert(1)',
'Unicode LS/PS I': '\u2028javascript:alert(1)',
'Unicode Whitespace (#1)': ' javascript:alert(1)',
'Unicode Whitespace (#2)': ' javascript:alert(1)',
'infinity loop': 'javascript:while(1){}',
'data URL': 'data:,evilnastystuff'
}
})
t.end()
})
t.test('`li`', function (t) {
t.deepEqual(
sanitize(h('li', 'alert(1)')),
h('li', 'alert(1)'),
'should allow `li` outside list'
)
t.deepEqual(
sanitize(h('ol', h('li', 'alert(1)'))),
h('ol', h('li', 'alert(1)')),
'should allow `li` in `ol`'
)
t.deepEqual(
sanitize(h('ul', h('li', 'alert(1)'))),
h('ul', h('li', 'alert(1)')),
'should allow `li` in `ul`'
)
t.deepEqual(
sanitize(h('ol', h('div', h('li', 'alert(1)')))),
h('ol', h('div', h('li', 'alert(1)'))),
'should allow `li` descendant `ol`'
)
t.deepEqual(
sanitize(h('ul', h('div', h('li', 'alert(1)')))),
h('ul', h('div', h('li', 'alert(1)'))),
'should allow `li` descendant `ul`'
)
t.end()
})
;['tr', 'td', 'th', 'tbody', 'thead', 'tfoot'].forEach(function (name) {
t.test('`' + name + '`', function (t) {
t.deepEqual(
sanitize(h(name, 'alert(1)')),
u('text', 'alert(1)'),
'should not allow `' + name + '` outside `table`'
)
t.deepEqual(
sanitize(h('table', h(name, 'alert(1)'))),
h('table', h(name, 'alert(1)')),
'should allow `' + name + '` in `table`'
)
t.deepEqual(
sanitize(h('table', h('div', h(name, 'alert(1)')))),
h('table', h('div', h(name, 'alert(1)'))),
'should allow `' + name + '` descendant `table`'
)
t.end()
})
})
t.deepEqual(
sanitize(h('input')),
h('input', {type: 'checkbox', disabled: true}),
'should allow only disabled checkbox inputs'
)
t.deepEqual(
sanitize(h('input', {type: 'text'})),
h('input', {type: 'checkbox', disabled: true}),
'should not allow text inputs'
)
t.deepEqual(
sanitize(h('input', {type: 'checkbox', disabled: false})),
h('input', {type: 'checkbox', disabled: true}),
'should not allow enabled inputs'
)
t.deepEqual(
sanitize(h('ol', [h('li')])),
h('ol', [h('li')]),
'should allow list items'
)
t.deepEqual(
sanitize(h('ol', [h('li', {className: ['foo', 'bar']})])),
h('ol', [h('li', {className: []})]),
'should not allow classes on list items'
)
t.deepEqual(
sanitize(h('ol', [h('li', {className: ['foo', 'task-list-item']})])),
h('ol', [h('li', {className: ['task-list-item']})]),
'should only allow `task-list-item` as a class on list items'
)
t.deepEqual(
sanitize(h('select')),
u('root', []),
'should ignore some elements by default'
)
t.deepEqual(
sanitize(h('select'), merge(gh, {tagNames: ['select']})),
h('select'),
'should support allowing elements through the schema'
)
t.deepEqual(
sanitize(
h('select', {autoComplete: true}),
merge(gh, {tagNames: ['select']})
),
h('select'),
'should ignore attributes for new elements'
)
t.deepEqual(
sanitize(
h('select', {autoComplete: true}),
merge(gh, {
tagNames: ['select'],
attributes: {select: ['autoComplete']}
})
),
h('select', {autoComplete: true}),
'should support allowing attributes for new elements through the schema'
)
t.deepEqual(
sanitize(
h('div', [h('select', {form: 'one'}), h('select', {form: 'two'})]),
merge(gh, {
tagNames: ['select'],
attributes: {select: [['form', 'one']]}
})
),
h('div', [h('select', {form: 'one'}), h('select')]),
'should support a list of valid values on new attributes'
)
t.deepEqual(
sanitize(
h('div', [
h('select', {form: 'alpha'}),
h('select', {form: 'bravo'}),
h('select', {}),
h('select', {form: false})
]),
merge(gh, {
tagNames: ['select'],
attributes: {select: [['form', 'alpha']]},
required: {select: {form: 'alpha'}}
})
),
h('div', [
h('select', {form: 'alpha'}),
h('select', {form: 'alpha'}),
h('select', {form: 'alpha'}),
h('select', {form: 'alpha'})
]),
'should support required attributes'
)
t.deepEqual(
sanitize(h('div', h('li', 'text')), {
tagNames: ['div', 'ul', 'li'],
ancestors: {li: ['ul']}
}),
h('div', 'text'),
'should support `ancestors` to enforce certain ancestors (rehypejs/rehype-sanitize#8)'
)
t.end()
})
t.test('`root`', function (t) {
t.deepEqual(
sanitize({
type: 'root',
tagName: 'div',
value: 'alert(1)',
unknown: 'alert(1)',
properties: {href: 'javascript:alert(1)'},
children: [h('script', 'alert(1)')],
data: {href: 'alert(1)'},
position: {
start: {line: 1, column: 1},
end: {line: 2, column: 1}
}
}),
{
type: 'root',
children: [],
data: {href: 'alert(1)'},
position: {
start: {line: 1, column: 1},
end: {line: 2, column: 1}
}
},
'should allow known properties'
)
t.deepEqual(
sanitize(u('root', [h('div', h('li', 'text'))]), {
tagNames: ['div', 'ul', 'li'],
ancestors: {li: ['ul']}
}),
u('root', [h('div', 'text')]),
'should support `ancestors` to enforce certain ancestors in a `root` (rehypejs/rehype-sanitize#8)'
)
t.end()
})
t.end()
})
// Coverage.
toString()
// Check.
function toString() {
return 'alert(1);'
}
// Test `valid` and `invalid` `url`s in `prop` on `tagName`.
function testAllURLs(t, tagName, prop, all) {
testURLs(t, tagName, prop, all.valid, true)
testURLs(t, tagName, prop, all.invalid, false)
}
// Test `valid` `url`s in `prop` on `tagName`.
function testURLs(t, tagName, prop, urls, valid) {
Object.keys(urls).forEach(function (name) {
var props = {}
props[prop] = urls[name]
t.deepEqual(
sanitize(h(tagName, props)),
h(tagName, valid ? props : {}),
'should ' + (valid ? 'allow' : 'clean') + ' ' + name
)
})
}
/* eslint-enable no-script-url, max-params */