blob: 7ccd60b27af45647c6e0127dce48a7703bd6b8e0 [file] [log] [blame]
// 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_tokenizer.h"
namespace net {
HttpAuthChallengeTokenizer::HttpAuthChallengeTokenizer(
std::string::const_iterator begin,
std::string::const_iterator end)
: begin_(begin),
end_(end),
scheme_begin_(begin),
scheme_end_(begin),
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.
int 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.
scheme_begin_ = tok.token_begin();
scheme_end_ = tok.token_end();
params_begin_ = scheme_end_;
params_end_ = end;
HttpUtil::TrimLWS(&params_begin_, &params_end_);
}
} // namespace net