/// <summary>
/// Gets the crypto version.
/// </summary>
/// <returns>The crypto version.</returns>
/// <param name="Date">Date.</param>
public static string GetCryptoVersion(byte[] Date)
{
using (MemoryStream ms = new MemoryStream()) {
BinaryFormatter bf = new BinaryFormatter();
ms.Write(Date, 0, Date.Length);
ms.Position = 0;
PasswdBase tmp = bf.Deserialize(ms) as PasswdBase;
if (tmp == null)
{
return(null);
}
return(tmp.VersionHash);
}
}
/// <summary>
/// Check the specified Date.
/// the date is from disk or datebase
/// </summary>
/// <param name="Date">Date.</param>
public bool Check(byte[] Date)
{
using (MemoryStream ms = new MemoryStream()) {
BinaryFormatter bf = new BinaryFormatter();
ms.Write(Date, 0, Date.Length);
ms.Position = 0;
PasswdBase tmp = bf.Deserialize(ms) as PasswdBase;
if (tmp == null)
{
return(false);
}
//show this password is not in this check
if (tmp.VersionHash != this.GetGUID())
{
return(false);
}
return(this.CheckSecret(tmp));
}
}
protected override bool CheckSecret(PasswdBase info)
{
CryExtInfo infos = info.ExtraInfo as CryExtInfo;
if (infos == null)
{
return(false);
}
using (HMACSHA512 hash512 = new HMACSHA512(infos.Key)) {
byte[] pwdDate = Encoding.UTF8.GetBytes(this.Password);
byte[] pwdWithSalt = new byte[pwdDate.Length + infos.Salt.Length];
Array.Copy(pwdDate, pwdWithSalt, pwdDate.Length);
Array.Copy(infos.Salt, 0, pwdWithSalt, pwdDate.Length, infos.Salt.Length);
byte[] pwdBuffer = hash512.ComputeHash(pwdWithSalt);
for (int i = 0; i <= infos.Count; i++)
{
pwdBuffer = hash512.ComputeHash(pwdBuffer);
}
return(this.SlowCompose(info.Password, pwdBuffer));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="AbPasswdPlugin.Crypt"/> class.
/// </summary>
/// <param name="passwd">Passwd.</param>
public PBKDF2(string passwd)
: base(passwd)
{
this.date = new PasswdBase();
}
/// <summary>
/// Initializes a new instance of the <see cref="AbPasswdPlugin.Crypt"/> class.
/// </summary>
public PBKDF2()
: base("", 100, 200)
{
this.date = new PasswdBase();
}
/// <summary> /// Checks the secret. /// </summary> /// <returns><c>true</c>, if secret was checked, <c>false</c> otherwise.</returns> /// <param name="info">Info.</param> protected abstract bool CheckSecret(PasswdBase info);
/// <summary>
/// Initializes a new instance of the <see cref="AbPasswdPlugin.Crypt"/> class.
/// </summary>
public PBKDF2()
: base("",100,200)
{
this.date = new PasswdBase ();
}
protected override bool CheckSecret(PasswdBase info)
{
CryExtInfo infos = info.ExtraInfo as CryExtInfo;
if (infos == null)
return false;
using (HMACSHA512 hash512 = new HMACSHA512(infos.Key)) {
byte[] pwdDate = Encoding.UTF8.GetBytes (this.Password);
byte[] pwdWithSalt = new byte[pwdDate.Length + infos.Salt.Length];
Array.Copy (pwdDate, pwdWithSalt, pwdDate.Length);
Array.Copy (infos.Salt, 0, pwdWithSalt, pwdDate.Length, infos.Salt.Length);
byte[] pwdBuffer = hash512.ComputeHash (pwdWithSalt);
for (int i =0; i<=infos.Count; i++) {
pwdBuffer = hash512.ComputeHash (pwdBuffer);
}
return this.SlowCompose (info.Password, pwdBuffer);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="AbPasswdPlugin.Crypt"/> class.
/// </summary>
/// <param name="passwd">Passwd.</param>
public PBKDF2(string passwd)
: base(passwd)
{
this.date = new PasswdBase ();
}
/// <summary> /// Checks the secret. /// </summary> /// <returns><c>true</c>, if secret was checked, <c>false</c> otherwise.</returns> /// <param name="info">Info.</param> protected abstract bool CheckSecret(PasswdBase info);
