public static byte[] ComputeHash(byte[] data, int start, int count, Blake2BConfig config)
{
var hasher = Create(config);
hasher.Update(data, start, count);
return(hasher.Finish());
}
public Blake2BHasher(Blake2BConfig config)
{
if (config == null)
{
config = DefaultConfig;
}
rawConfig = Blake2IvBuilder.ConfigB(config, null);
if (config.Key != null && config.Key.Length != 0)
{
key = new byte[128];
Array.Copy(config.Key, key, config.Key.Length);
}
outputSizeInBytes = config.OutputSizeInBytes;
Init();
}
public Blake2BConfig Clone()
{
var result = new Blake2BConfig();
result.OutputSizeInBytes = OutputSizeInBytes;
if (Key != null)
{
result.Key = (byte[])Key.Clone();
}
if (Personalization != null)
{
result.Personalization = (byte[])Personalization.Clone();
}
if (Salt != null)
{
result.Salt = (byte[])Salt.Clone();
}
return(result);
}
public static byte[] ComputeHash(byte[] data, Blake2BConfig config)
{
return(ComputeHash(data, 0, data.Length, config));
}
public static Hasher Create(Blake2BConfig config)
{
return(new Blake2BHasher(config));
}
public static ulong[] ConfigB(Blake2BConfig config, Blake2BTreeConfig treeConfig)
{
bool isSequential = treeConfig == null;
if (isSequential)
{
treeConfig = SequentialTreeConfig;
}
var rawConfig = new ulong[8];
var result = new ulong[8];
//digest length
if (config.OutputSizeInBytes <= 0 | config.OutputSizeInBytes > 64)
{
throw new ArgumentOutOfRangeException("config.OutputSize");
}
rawConfig[0] |= (ulong)(uint)config.OutputSizeInBytes;
//Key length
if (config.Key != null)
{
if (config.Key.Length > 64)
{
throw new ArgumentException("config.Key", "Key too long");
}
rawConfig[0] |= (ulong)((uint)config.Key.Length << 8);
}
// FanOut
rawConfig[0] |= (uint)treeConfig.FanOut << 16;
// Depth
rawConfig[0] |= (uint)treeConfig.MaxHeight << 24;
// Leaf length
rawConfig[0] |= ((ulong)(uint)treeConfig.LeafSize) << 32;
// Inner length
if (!isSequential && (treeConfig.IntermediateHashSize <= 0 || treeConfig.IntermediateHashSize > 64))
{
throw new ArgumentOutOfRangeException("treeConfig.TreeIntermediateHashSize");
}
rawConfig[2] |= (uint)treeConfig.IntermediateHashSize << 8;
// Salt
if (config.Salt != null)
{
if (config.Salt.Length != 16)
{
throw new ArgumentException("config.Salt has invalid length");
}
rawConfig[4] = Blake2BCore.BytesToUInt64(config.Salt, 0);
rawConfig[5] = Blake2BCore.BytesToUInt64(config.Salt, 8);
}
// Personalization
if (config.Personalization != null)
{
if (config.Personalization.Length != 16)
{
throw new ArgumentException("config.Personalization has invalid length");
}
rawConfig[6] = Blake2BCore.BytesToUInt64(config.Personalization, 0);
rawConfig[7] = Blake2BCore.BytesToUInt64(config.Personalization, 8);
}
return(rawConfig);
}