} // end cctr
/// <summary>
/// Initialise the <see cref="PBKDF_Argon2NotBuildInAdapter" />
/// from the password and parameters.
/// </summary>
/// <param name="a_Password">
/// the password to use.
/// </param>
/// <param name="a_Parameters">
/// Argon2 configuration.
/// </param>
internal PBKDF_Argon2NotBuildInAdapter(byte[] a_Password, IArgon2Parameters a_Parameters)
{
if (a_Password == null)
{
throw new ArgumentNullHashLibException(nameof(a_Password));
}
ValidatePBKDF_Argon2Inputs(a_Parameters);
Password = a_Password.DeepCopy();
Parameters = a_Parameters;
if (Parameters.Lanes < MIN_PARALLELISM)
{
throw new ArgumentInvalidHashLibException(
String.Format(Global.LanesTooSmall, MIN_PARALLELISM));
}
else if (Parameters.Lanes > MAX_PARALLELISM)
{
throw new ArgumentInvalidHashLibException(
String.Format(Global.LanesTooBig, MAX_PARALLELISM));
}
else if (Parameters.Memory < (2 * Parameters.Lanes))
{
throw new ArgumentInvalidHashLibException(
String.Format(Global.MemoryTooSmall, 2 * Parameters.Lanes, 2 * Parameters.Lanes));
}
else if (Parameters.Iterations < MIN_ITERATIONS)
{
throw new ArgumentInvalidHashLibException(
String.Format(Global.IterationsTooSmall, MIN_ITERATIONS));
}
DoInit(a_Parameters);
} // end cctr
} // end function Clear
private byte[] InitialHash(IArgon2Parameters a_Parameters, Int32 a_OutputLength,
byte[] a_Password)
{
IHash LBlake2B = MakeBlake2BInstanceAndInitialize(ARGON2_PREHASH_DIGEST_LENGTH);
AddIntToLittleEndian(LBlake2B, a_Parameters.Lanes);
AddIntToLittleEndian(LBlake2B, a_OutputLength);
AddIntToLittleEndian(LBlake2B, a_Parameters.Memory);
AddIntToLittleEndian(LBlake2B, a_Parameters.Iterations);
AddIntToLittleEndian(LBlake2B, (Int32)a_Parameters.Version);
AddIntToLittleEndian(LBlake2B, (Int32)a_Parameters.Type);
AddByteString(LBlake2B, a_Password);
AddByteString(LBlake2B, a_Parameters.Salt);
AddByteString(LBlake2B, a_Parameters.Secret);
AddByteString(LBlake2B, a_Parameters.Additional);
return(LBlake2B.TransformFinal().GetBytes());
} // end function InitialHash
} // end function InitializeMemory
private void DoInit(IArgon2Parameters a_Parameters)
{
Int32 MemoryBlocks;
// 2. Align memory size
// Minimum memoryBlocks = 8L blocks, where L is the number of lanes */
MemoryBlocks = a_Parameters.Memory;
if (MemoryBlocks < (2 * ARGON2_SYNC_POINTS * a_Parameters.Lanes))
{
MemoryBlocks = 2 * ARGON2_SYNC_POINTS * a_Parameters.Lanes;
}
SegmentLength = MemoryBlocks / (Parameters.Lanes * ARGON2_SYNC_POINTS);
LaneLength = SegmentLength * ARGON2_SYNC_POINTS;
// Ensure that all segments have equal length
MemoryBlocks = SegmentLength * (a_Parameters.Lanes * ARGON2_SYNC_POINTS);
InitializeMemory(MemoryBlocks);
} // end function DoInit
public static IPBKDF_Argon2 CreatePBKDF_Argon2(byte[] a_Password, IArgon2Parameters a_Argon2Parameters) => new PBKDF_Argon2NotBuildInAdapter(a_Password, a_Argon2Parameters);
