http_security_headers.cc | Explore in Territory

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <limits>
#include <string_view>

#include "base/base64.h"
#include "base/check_op.h"
#include "base/notreached.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "net/base/parse_number.h"
#include "net/http/http_security_headers.h"
#include "net/http/http_util.h"
#include "url/gurl.h"

namespace net {

namespace {

enum MaxAgeParsing { … };

// MaxAgeToLimitedInt converts a string representation of a "whole number" of
// seconds into a uint32_t. The string may contain an arbitrarily large number,
// which will be clipped to a supplied limit and which is guaranteed to fit
// within a 32-bit unsigned integer. False is returned on any parse error.
bool MaxAgeToLimitedInt(std::string_view s, uint32_t limit, uint32_t* result) { … }

}  // namespace

// Parse the Strict-Transport-Security header, as currently defined in
// http://tools.ietf.org/html/draft-ietf-websec-strict-transport-sec-14:
//
// Strict-Transport-Security = "Strict-Transport-Security" ":"
//                             [ directive ]  *( ";" [ directive ] )
//
// directive                 = directive-name [ "=" directive-value ]
// directive-name            = token
// directive-value           = token | quoted-string
//
// 1.  The order of appearance of directives is not significant.
//
// 2.  All directives MUST appear only once in an STS header field.
//     Directives are either optional or required, as stipulated in
//     their definitions.
//
// 3.  Directive names are case-insensitive.
//
// 4.  UAs MUST ignore any STS header fields containing directives, or
//     other header field value data, that does not conform to the
//     syntax defined in this specification.
//
// 5.  If an STS header field contains directive(s) not recognized by
//     the UA, the UA MUST ignore the unrecognized directives and if the
//     STS header field otherwise satisfies the above requirements (1
//     through 4), the UA MUST process the recognized directives.
bool ParseHSTSHeader(const std::string& value,
                     base::TimeDelta* max_age,
                     bool* include_subdomains) { … }

}  // namespace net
chromium/net/http/http_security_headers.cc
