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- // 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
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