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// Copyright (c) 2011 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 "remoting/protocol/auth_token_utils.h"
#include "base/base64.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "crypto/sha2.h"
namespace remoting {
namespace protocol {
namespace {
// Normalizes access code. Must be applied on the access code entered
// by the user before generating auth token. It (1)converts the string
// to upper case, (2) replaces O with 0 and (3) replaces I with 1.
std::string NormalizeAccessCode(const std::string& access_code) {
std::string normalized = access_code;
StringToUpperASCII(&normalized);
for (std::string::iterator i = normalized.begin();
i != normalized.end(); ++i) {
if (*i == 'O') {
*i = '0';
} else if (*i == 'I') {
*i = '1';
}
}
return normalized;
}
} // namespace
std::string GenerateSupportAuthToken(const std::string& jid,
const std::string& access_code) {
std::string sha256 = crypto::SHA256HashString(jid + " " + access_code);
std::string sha256_base64;
if (!base::Base64Encode(sha256, &sha256_base64)) {
LOG(FATAL) << "Failed to encode auth token";
}
return sha256_base64;
}
bool VerifySupportAuthToken(const std::string& jid,
const std::string& access_code,
const std::string& auth_token) {
std::string expected_token =
GenerateSupportAuthToken(jid, NormalizeAccessCode(access_code));
return expected_token == auth_token;
}
} // namespace protocol
} // namespace remoting
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