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// Copyright 2015 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 "base/base64.h"
#include "base/strings/string_util.h"
#include "net/http/http_auth_challenge_tokenizer.h"
#include "net/http/http_auth_multi_round_parse.h"
namespace net {
namespace {
// Check that the scheme in the challenge matches the expected scheme
bool SchemeIsValid(const std::string& scheme,
HttpAuthChallengeTokenizer* challenge) {
// There is no guarantee that challenge->scheme() is valid ASCII, but
// LowerCaseEqualsASCII will do the right thing even if it isn't.
return base::LowerCaseEqualsASCII(challenge->scheme(),
base::ToLowerASCII(scheme));
}
} // namespace
HttpAuth::AuthorizationResult ParseFirstRoundChallenge(
const std::string& scheme,
HttpAuthChallengeTokenizer* challenge) {
// Verify the challenge's auth-scheme.
if (!SchemeIsValid(scheme, challenge))
return HttpAuth::AUTHORIZATION_RESULT_INVALID;
std::string encoded_auth_token = challenge->base64_param();
if (!encoded_auth_token.empty()) {
return HttpAuth::AUTHORIZATION_RESULT_INVALID;
}
return HttpAuth::AUTHORIZATION_RESULT_ACCEPT;
}
HttpAuth::AuthorizationResult ParseLaterRoundChallenge(
const std::string& scheme,
HttpAuthChallengeTokenizer* challenge,
std::string* encoded_token,
std::string* decoded_token) {
// Verify the challenge's auth-scheme.
if (!SchemeIsValid(scheme, challenge))
return HttpAuth::AUTHORIZATION_RESULT_INVALID;
*encoded_token = challenge->base64_param();
if (encoded_token->empty())
return HttpAuth::AUTHORIZATION_RESULT_REJECT;
// Make sure the additional token is base64 encoded.
if (!base::Base64Decode(*encoded_token, decoded_token))
return HttpAuth::AUTHORIZATION_RESULT_INVALID;
return HttpAuth::AUTHORIZATION_RESULT_ACCEPT;
}
} // namespace net
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