// Salt generator.// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.// // Permission is hereby granted, free of charge, to any person obtaining a copy of this// software and associated documentation files (the "Software"), to deal in the Software// without restriction, including without limitation the rights to use, copy, modify, merge,// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons// to whom the Software is furnished to do so, subject to the following conditions:// // The above copyright notice and this permission notice shall be included in all copies or// substantial portions of the Software.// // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER// DEALINGS IN THE SOFTWARE.using System;using System.Linq;namespace GSF.Net.Snmp.Security{ /// <summary> /// Salt generator. /// </summary> public sealed class SaltGenerator { private readonly object _root = new object(); private long _salt = Convert.ToInt64(new Random().Next(1, int.MaxValue)); internal void SetSalt(long salt) { _salt = salt; } /// <summary> /// Get next salt <see cref="Int64"/> value. Used internally to encrypt data. /// </summary> /// <returns>Random <see cref="Int64"/> value</returns> internal long NextSalt { get { lock (_root) { if (_salt == long.MaxValue) { _salt = 1; } else { _salt++; } return _salt; } } } /// <summary> /// Gets salt bytes. /// </summary> /// <returns></returns> public byte[] GetSaltBytes() { return BitConverter.GetBytes(NextSalt).Reverse().ToArray(); } /// <summary> /// Returns a <see cref="System.String"/> that represents this instance. /// </summary> /// <returns> /// A <see cref="System.String"/> that represents this instance. /// </returns> public override string ToString() { return "Salt generator"; } }}
// Salt generator.
// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using System.Linq;
namespace GSF.Net.Snmp.Security
{
/// <summary>
/// Salt generator.
/// </summary>
public sealed class SaltGenerator
{
private readonly object _root = new object();
private long _salt = Convert.ToInt64(new Random().Next(1, int.MaxValue));
internal void SetSalt(long salt)
{
_salt = salt;
}
/// <summary>
/// Get next salt <see cref="Int64"/> value. Used internally to encrypt data.
/// </summary>
/// <returns>Random <see cref="Int64"/> value</returns>
internal long NextSalt
{
get
{
lock (_root)
{
if (_salt == long.MaxValue)
{
_salt = 1;
}
else
{
_salt++;
}
return _salt;
}
}
}
/// <summary>
/// Gets salt bytes.
/// </summary>
/// <returns></returns>
public byte[] GetSaltBytes()
{
return BitConverter.GetBytes(NextSalt).Reverse().ToArray();
}
/// <summary>
/// Returns a <see cref="System.String"/> that represents this instance.
/// </summary>
/// <returns>
/// A <see cref="System.String"/> that represents this instance.
/// </returns>
public override string ToString()
{
return "Salt generator";
}
}
}