/// <summary>
/// Retrieve a parameter set by its enumeration name
/// </summary>
///
/// <param name="Name">The enumeration name</param>
///
/// <returns>A populated parameter set</returns>
///
/// <exception cref="NTRUException">Thrown if an invalid or unknown OId is used</exception>
public static NTRUParameters FromName(NTRUParamNames Name)
{
switch (Name)
{
case NTRUParamNames.A2011439:
return((NTRUParameters)APR2011439.Clone());
case NTRUParamNames.A2011743:
return((NTRUParameters)APR2011743.Clone());
case NTRUParamNames.E1087EP2:
return((NTRUParameters)EES1087EP2.Clone());
case NTRUParamNames.E1171EP1:
return((NTRUParameters)EES1171EP1.Clone());
case NTRUParamNames.E1499EP1:
return((NTRUParameters)EES1499EP1.Clone());
case NTRUParamNames.FA2011439:
return((NTRUParameters)APR2011439FAST.Clone());
case NTRUParamNames.FA2011743:
return((NTRUParameters)APR2011743FAST.Clone());
case NTRUParamNames.FE1087EP2:
return((NTRUParameters)EES1087EP2FAST.Clone());
case NTRUParamNames.FE1171EP1:
return((NTRUParameters)EES1171EP1FAST.Clone());
case NTRUParamNames.FE1499EP1:
return((NTRUParameters)EES1499EP1FAST.Clone());
case NTRUParamNames.CX1861:
return((NTRUParameters)CX1861SH512.Clone());
case NTRUParamNames.CX1931:
return((NTRUParameters)CX1931SH512.Clone());
default:
throw new NTRUException("NTRUParameters:FromName", "The enumeration name is unknown!", new ArgumentException());
}
}
/// <summary>
/// Retrieve a parameter set by its identity code
/// </summary>
///
/// <param name="OId">The 3 byte parameter set identity code</param>
/// <param name="UseProduct">Use the product form parameters</param>
///
/// <returns>A parameter set</returns>
///
/// <exception cref="NTRUException">Thrown if an invalid or unknown OId is used</exception>
public static NTRUParameters FromId(byte[] OId, bool UseProduct = true)
{
if (OId == null)
{
throw new NTRUException("NTRUParameters:FromId", "OId can not be null!", new ArgumentNullException());
}
if (OId.Length != 3)
{
throw new NTRUException("NTRUParameters:FromId", "OId must be 3 bytes in length!", new ArgumentOutOfRangeException());
}
if (OId[0] != 0)
{
throw new NTRUException("NTRUParameters:FromId", "OId is not a valid NTRU parameter id!", new ArgumentException());
}
if (UseProduct)
{
if (OId[2] == 3)
{
return((NTRUParameters)EES1087EP2FAST.Clone());
}
else if (OId[2] == 4)
{
return((NTRUParameters)EES1171EP1FAST.Clone());
}
else if (OId[2] == 5)
{
return((NTRUParameters)EES1499EP1FAST.Clone());
}
else if (OId[2] == 101)
{
return((NTRUParameters)APR2011439FAST.Clone());
}
else if (OId[2] == 105)
{
return((NTRUParameters)APR2011743FAST.Clone());
}
}
else
{
if (OId[2] == 3)
{
return((NTRUParameters)EES1087EP2.Clone());
}
else if (OId[2] == 4)
{
return((NTRUParameters)EES1171EP1.Clone());
}
else if (OId[2] == 5)
{
return((NTRUParameters)EES1499EP1.Clone());
}
else if (OId[2] == 101)
{
return((NTRUParameters)APR2011439.Clone());
}
else if (OId[2] == 105)
{
return((NTRUParameters)APR2011743.Clone());
}
else if (OId[2] == 7)
{
return((NTRUParameters)CX1861SH512.Clone());
}
else if (OId[2] == 8)
{
return((NTRUParameters)CX1931SH512.Clone());
}
}
throw new NTRUException("NTRUParameters:FromId", "OId does not identify a valid param set!", new ArgumentException());
}