/// <summary>
/// Verify MD5 authentication of a packet.
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="authenticationParameters">Authentication parameters extracted from the packet being authenticated</param>
/// <param name="wholeMessage">Entire packet being authenticated</param>
/// <returns>True on authentication success, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] authKey, byte[] authenticationParameters, MutableByte wholeMessage)
{
var md5 = new HMACMD5(authKey);
var hash = md5.ComputeHash(wholeMessage, 0, wholeMessage.Length);
var myhash = new MutableByte(hash, 12);
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
/// <summary>
/// Verify SHA-1 authentication of a packet.
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="authenticationParameters">Authentication parameters extracted from the packet being authenticated</param>
/// <param name="wholeMessage">Entire packet being authenticated</param>
/// <returns>True on authentication success, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] authKey, byte[] authenticationParameters, MutableByte wholeMessage)
{
var sha = new HMACSHA1(authKey);
var hash = sha.ComputeHash(wholeMessage);
var myhash = new MutableByte(hash, 12);
sha.Clear(); // release resources
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
/// <summary>
/// Verifies correct MD5 authentication of the frame. Prior to calling this method, you have to extract authentication
/// parameters from the wholeMessage and reset authenticationParameters field in the USM information block to 12 0x00
/// values.
/// </summary>
/// <param name="userPassword">User password</param>
/// <param name="engineId">Authoritative engine id</param>
/// <param name="authenticationParameters">Extracted USM authentication parameters</param>
/// <param name="wholeMessage">Whole message with authentication parameters zeroed (0x00) out</param>
/// <returns>True if message authentication has passed the check, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] userPassword, byte[] engineId, byte[] authenticationParameters, MutableByte wholeMessage)
{
byte[] authKey = PasswordToKey(userPassword, engineId);
HMACMD5 md5 = new HMACMD5(authKey);
byte[] hash = md5.ComputeHash(wholeMessage, 0, wholeMessage.Length);
MutableByte myhash = new MutableByte(hash, 12);
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
/// <summary>
/// Verifies correct SHA-1 authentication of the frame. Prior to calling this method, you have to extract authentication
/// parameters from the wholeMessage and reset authenticationParameters field in the USM information block to 12 0x00
/// values.
/// </summary>
/// <param name="userPassword">User password</param>
/// <param name="engineId">Authoritative engine id</param>
/// <param name="authenticationParameters">Extracted USM authentication parameters</param>
/// <param name="wholeMessage">Whole message with authentication parameters zeroed (0x00) out</param>
/// <returns>True if message authentication has passed the check, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] userPassword, byte[] engineId, byte[] authenticationParameters, MutableByte wholeMessage)
{
byte[] authKey = PasswordToKey(userPassword, engineId);
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
MutableByte myhash = new MutableByte(hash, 12);
sha.Clear(); // release resources
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
/// <summary>
/// Verify SHA-1 authentication of a packet.
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="authenticationParameters">Authentication parameters extracted from the packet being authenticated</param>
/// <param name="wholeMessage">Entire packet being authenticated</param>
/// <returns>True on authentication success, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] authKey, byte[] authenticationParameters, MutableByte wholeMessage)
{
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
MutableByte myhash = new MutableByte(hash, 12);
#if !NETCOREAPP11 && !NETSTANDARD15
sha.Clear(); // release resources
#else
sha.Dispose();
#endif
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}