blob: cd9830e6866ff047350268107ecc18844a8b97c6 [file] [log] [blame]
// Copyright 2016 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/unguessable_token.h"
#include "base/format_macros.h"
#include "base/rand_util.h"
#include "base/strings/stringprintf.h"
namespace base {
UnguessableToken::UnguessableToken(uint64_t high, uint64_t low)
: high_(high), low_(low) {}
std::string UnguessableToken::ToString() const {
return base::StringPrintf("(%08" PRIX64 "%08" PRIX64 ")", high_, low_);
// static
UnguessableToken UnguessableToken::Create() {
UnguessableToken token;
// Use base::RandBytes instead of crypto::RandBytes, because crypto calls the
// base version directly, and to prevent the dependency from base/ to crypto/.
base::RandBytes(&token, sizeof(token));
return token;
// static
UnguessableToken UnguessableToken::Deserialize(uint64_t high, uint64_t low) {
// Receiving a zeroed out UnguessableToken from another process means that it
// was never initialized via Create(). Treat this case as a security issue.
DCHECK(!(high == 0 && low == 0));
return UnguessableToken(high, low);
std::ostream& operator<<(std::ostream& out, const UnguessableToken& token) {
return out << token.ToString();
} // namespace base