private Blake2S Blake2SPCreateRoot()
{
IBlake2SConfig blake2SConfig = new Blake2SConfig(HashSize);
blake2SConfig.Key = Key.DeepCopy();
IBlake2STreeConfig blake2STreeConfig = new Blake2STreeConfig();
blake2STreeConfig.FanOut = (byte)ParallelismDegree;
blake2STreeConfig.MaxDepth = 2;
blake2STreeConfig.NodeDepth = 1;
blake2STreeConfig.LeafSize = 0;
blake2STreeConfig.NodeOffset = 0;
blake2STreeConfig.InnerHashSize = (byte)OutSizeInBytes;
blake2STreeConfig.IsLastNode = true;
return(new Blake2S(blake2SConfig, blake2STreeConfig, false));
}
private Blake2S Blake2SPCreateRoot()
{
var config = new Blake2SConfig(HashSize)
{
Key = _key
};
var treeConfig = new Blake2STreeConfig
{
FanOut = ParallelismDegree,
MaxDepth = 2,
NodeDepth = 1,
LeafSize = 0,
NodeOffset = 0,
InnerHashSize = OutSizeInBytes,
IsLastNode = true
};
return(new Blake2S(config, treeConfig, false));
}
private Blake2S Blake2SPCreateLeaf(UInt64 a_Offset)
{
IBlake2SConfig blake2SConfig = new Blake2SConfig(HashSize);
blake2SConfig.Key = Key.DeepCopy();
IBlake2STreeConfig blake2STreeConfig = new Blake2STreeConfig();
blake2STreeConfig.FanOut = (byte)ParallelismDegree;
blake2STreeConfig.MaxDepth = 2;
blake2STreeConfig.NodeDepth = 0;
blake2STreeConfig.LeafSize = 0;
blake2STreeConfig.NodeOffset = a_Offset;
blake2STreeConfig.InnerHashSize = (byte)OutSizeInBytes;
if (a_Offset == (UInt64)(ParallelismDegree - 1))
{
blake2STreeConfig.IsLastNode = true;
}
return(Blake2SPCreateLeafParam(blake2SConfig, blake2STreeConfig));
}
private Blake2S Blake2SPCreateLeaf(ulong offset)
{
var config = new Blake2SConfig(OutSizeInBytes)
{
Key = _key
};
var treeConfig = new Blake2STreeConfig
{
FanOut = ParallelismDegree,
MaxDepth = 2,
NodeDepth = 0,
LeafSize = 0,
NodeOffset = offset,
InnerHashSize = OutSizeInBytes
};
if (offset == ParallelismDegree - 1)
{
treeConfig.IsLastNode = true;
}
return(Blake2SPCreateLeafParam(config, treeConfig));
}
/// <summary> /// <br />Blake2S defaults to setting the expected output length <br /> /// from <c>Config.HashSize</c>. <br />In some cases, however, /// we do not want this, as the output length <br /> /// of these instances is given by <c>TreeConfig.InnerSize</c> /// instead. <br /> /// </summary> private static Blake2S Blake2SPCreateLeafParam(Blake2SConfig config, Blake2STreeConfig treeConfig) => new Blake2S(config, treeConfig);
public static IHash CreateBlake2S(Blake2SConfig config = null, Blake2STreeConfig treeConfig = null) => new Blake2S(config ?? Blake2SConfig.DefaultConfig, treeConfig);
// https://docs.python.org/3/library/hashlib.html#tree-mode modified for Blake2s
public void TestBlake2STreeHashingMode()
{
const byte FAN_OUT = 2;
const byte DEPTH = 2; // MaxDepth
const UInt32 LEAF_SIZE = 4096;
const byte INNER_SIZE = 32;
IBlake2STreeConfig Blake2STreeConfigh00, Blake2STreeConfigh01, Blake2STreeConfigh10;
IHash h00, h01, h10;
byte[] LBuffer = new byte[6000];
// Left leaf
Blake2STreeConfigh00 = new Blake2STreeConfig();
Blake2STreeConfigh00.FanOut = FAN_OUT;
Blake2STreeConfigh00.MaxDepth = DEPTH;
Blake2STreeConfigh00.LeafSize = LEAF_SIZE;
Blake2STreeConfigh00.InnerHashSize = INNER_SIZE;
Blake2STreeConfigh00.NodeOffset = 0;
Blake2STreeConfigh00.NodeDepth = 0;
Blake2STreeConfigh00.IsLastNode = false;
h00 = HashFactory.Crypto.CreateBlake2S(new Blake2SConfig() as IBlake2SConfig, Blake2STreeConfigh00);
h00.Initialize();
// Right leaf
Blake2STreeConfigh01 = new Blake2STreeConfig();
Blake2STreeConfigh01.FanOut = FAN_OUT;
Blake2STreeConfigh01.MaxDepth = DEPTH;
Blake2STreeConfigh01.LeafSize = LEAF_SIZE;
Blake2STreeConfigh01.InnerHashSize = INNER_SIZE;
Blake2STreeConfigh01.NodeOffset = 1;
Blake2STreeConfigh01.NodeDepth = 0;
Blake2STreeConfigh01.IsLastNode = true;
h01 = HashFactory.Crypto.CreateBlake2S(new Blake2SConfig() as IBlake2SConfig, Blake2STreeConfigh01);
h01.Initialize();
// Root node
Blake2STreeConfigh10 = new Blake2STreeConfig();
Blake2STreeConfigh10.FanOut = FAN_OUT;
Blake2STreeConfigh10.MaxDepth = DEPTH;
Blake2STreeConfigh10.LeafSize = LEAF_SIZE;
Blake2STreeConfigh10.InnerHashSize = INNER_SIZE;
Blake2STreeConfigh10.NodeOffset = 0;
Blake2STreeConfigh10.NodeDepth = 1;
Blake2STreeConfigh10.IsLastNode = true;
h10 = HashFactory.Crypto.CreateBlake2S(new Blake2SConfig(16) as IBlake2SConfig, Blake2STreeConfigh10);
h10.Initialize();
byte[] temp = new byte[LEAF_SIZE];
Utils.Utils.Memcopy(ref temp, LBuffer, (Int32)LEAF_SIZE);
h10.TransformBytes(h00.ComputeBytes(temp).GetBytes());
temp = new byte[LBuffer.Length - LEAF_SIZE];
Utils.Utils.Memcopy(ref temp, LBuffer, (Int32)(LBuffer.Length - LEAF_SIZE), (Int32)LEAF_SIZE);
h10.TransformBytes(h01.ComputeBytes(temp).GetBytes());
string ActualString = h10.TransformFinal().ToString();
string ExpectedString = Blake2STreeHashingMode;
Assert.AreEqual(ExpectedString, ActualString,
String.Format("Expected {0} but got {1}.",
ExpectedString, ActualString));
}
public static Blake2XSConfig CreateBlake2XSConfig(Blake2SConfig config, Blake2STreeConfig treeConfig) => new Blake2XSConfig(config, treeConfig);
private Blake2XSConfig(Blake2SConfig config, Blake2STreeConfig treeConfig)
{
Config = config;
TreeConfig = treeConfig;
}
