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/*
* Copyright (C) 2011 Google, Inc. All rights reserved.
* Copyright (C) 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ContentSecurityPolicyMediaListDirective.h"
#include "ContentSecurityPolicy.h"
#include "ParsingUtilities.h"
#include <wtf/text/StringHash.h>
namespace WebCore {
static bool isMediaTypeCharacter(UChar c)
{
return !isASCIISpace(c) && c != '/';
}
static bool isNotASCIISpace(UChar c)
{
return !isASCIISpace(c);
}
ContentSecurityPolicyMediaListDirective::ContentSecurityPolicyMediaListDirective(const String& name, const String& value, const ContentSecurityPolicy& policy)
: ContentSecurityPolicyDirective(name, value, policy)
{
parse(value);
}
bool ContentSecurityPolicyMediaListDirective::allows(const String& type) const
{
return m_pluginTypes.contains(type);
}
void ContentSecurityPolicyMediaListDirective::parse(const String& value)
{
auto characters = StringView(value).upconvertedCharacters();
const UChar* begin = characters;
const UChar* position = begin;
const UChar* end = begin + value.length();
// 'plugin-types ____;' OR 'plugin-types;'
if (value.isEmpty()) {
policy().reportInvalidPluginTypes(value);
return;
}
while (position < end) {
// _____ OR _____mime1/mime1
// ^ ^
skipWhile<UChar, isASCIISpace>(position, end);
if (position == end)
return;
// mime1/mime1 mime2/mime2
// ^
begin = position;
if (!skipExactly<UChar, isMediaTypeCharacter>(position, end)) {
skipWhile<UChar, isNotASCIISpace>(position, end);
policy().reportInvalidPluginTypes(String(begin, position - begin));
continue;
}
skipWhile<UChar, isMediaTypeCharacter>(position, end);
// mime1/mime1 mime2/mime2
// ^
if (!skipExactly<UChar>(position, end, '/')) {
skipWhile<UChar, isNotASCIISpace>(position, end);
policy().reportInvalidPluginTypes(String(begin, position - begin));
continue;
}
// mime1/mime1 mime2/mime2
// ^
if (!skipExactly<UChar, isMediaTypeCharacter>(position, end)) {
skipWhile<UChar, isNotASCIISpace>(position, end);
policy().reportInvalidPluginTypes(String(begin, position - begin));
continue;
}
skipWhile<UChar, isMediaTypeCharacter>(position, end);
// mime1/mime1 mime2/mime2 OR mime1/mime1 OR mime1/mime1/error
// ^ ^ ^
if (position < end && isNotASCIISpace(*position)) {
skipWhile<UChar, isNotASCIISpace>(position, end);
policy().reportInvalidPluginTypes(String(begin, position - begin));
continue;
}
m_pluginTypes.add(String(begin, position - begin));
ASSERT(position == end || isASCIISpace(*position));
}
}
} // namespace WebCore
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