// Copyright 2014 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "net/http/http_auth_challenge_tokenizer.h" #include "base/strings/string_piece.h" #include "base/strings/string_tokenizer.h" #include "base/strings/string_util.h" namespace net { HttpAuthChallengeTokenizer::HttpAuthChallengeTokenizer( std::string::const_iterator begin, std::string::const_iterator end) : begin_(begin), end_(end), params_begin_(end), params_end_(end) { Init(begin, end); } HttpAuthChallengeTokenizer::~HttpAuthChallengeTokenizer() = default; HttpUtil::NameValuePairsIterator HttpAuthChallengeTokenizer::param_pairs() const { return HttpUtil::NameValuePairsIterator(params_begin_, params_end_, ','); } std::string HttpAuthChallengeTokenizer::base64_param() const { // Strip off any padding. // (See https://bugzilla.mozilla.org/show_bug.cgi?id=230351.) // // Our base64 decoder requires that the length be a multiple of 4. auto encoded_length = params_end_ - params_begin_; while (encoded_length > 0 && encoded_length % 4 != 0 && params_begin_[encoded_length - 1] == '=') { --encoded_length; } return std::string(params_begin_, params_begin_ + encoded_length); } void HttpAuthChallengeTokenizer::Init(std::string::const_iterator begin, std::string::const_iterator end) { // The first space-separated token is the auth-scheme. // NOTE: we are more permissive than RFC 2617 which says auth-scheme // is separated by 1*SP. base::StringTokenizer tok(begin, end, HTTP_LWS); if (!tok.GetNext()) { // Default param and scheme iterators provide empty strings return; } // Save the scheme's position. lower_case_scheme_ = base::ToLowerASCII( base::MakeStringPiece(tok.token_begin(), tok.token_end())); params_begin_ = tok.token_end(); params_end_ = end; HttpUtil::TrimLWS(¶ms_begin_, ¶ms_end_); } } // namespace net