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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/pin_hash.h"
#include "base/base64.h"
#include "base/logging.h"
#include "base/strings/string_split.h"
#include "remoting/protocol/auth_util.h"
#include "remoting/protocol/me2me_host_authenticator_factory.h"
namespace remoting {
bool ParsePinHashFromConfig(const std::string& value,
const std::string& host_id,
std::string* pin_hash_out) {
auto parts = base::SplitStringOnce(value, ':');
if (!parts) {
return false;
}
auto [function_name, encoded_pin_hash] = *parts;
if (!base::Base64Decode(encoded_pin_hash, pin_hash_out)) {
return false;
}
if (function_name == "plain") {
*pin_hash_out = protocol::GetSharedSecretHash(host_id, *pin_hash_out);
return true;
} else if (function_name == "hmac") {
return true;
}
pin_hash_out->clear();
return false;
}
std::string MakeHostPinHash(const std::string& host_id,
const std::string& pin) {
std::string hash = protocol::GetSharedSecretHash(host_id, pin);
std::string hash_base64 = base::Base64Encode(hash);
return "hmac:" + hash_base64;
}
bool VerifyHostPinHash(const std::string& hash,
const std::string& host_id,
const std::string& pin) {
std::string hash_parsed;
if (!ParsePinHashFromConfig(hash, host_id, &hash_parsed)) {
LOG(FATAL) << "Failed to parse PIN hash.";
}
std::string hash_calculated = protocol::GetSharedSecretHash(host_id, pin);
return hash_calculated == hash_parsed;
}
} // namespace remoting
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