/// <summary>
/// Creates a new <see cref="IBlake2B" /> instance with given configuration.
/// </summary>
/// <param name="config">The configuration to use.</param>
/// <returns>
/// A <see cref="IBlake2B" /> instance.
/// </returns>
/// <exception cref="ArgumentNullException">config</exception>
public IBlake2B Create(IBlake2BConfig config)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
return(new Blake2B_Implementation(config));
}
/// <summary>
/// Initializes an instance of the <see cref="Blake2B_Implementation"/> class with the provided
/// <paramref name="config"/>.
/// </summary>
/// <param name="config">The configuration to use for this instance.</param>
/// <exception cref="ArgumentNullException"><paramref name="config"/></exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="config"/>.<see cref="IBlake2BConfig.HashSizeInBits"/>;Expected: <see cref="MinHashSizeBits"/> >= <paramref name="config"/>.<see cref="IBlake2BConfig.HashSizeInBits"/> <= <see cref="MaxHashSizeBits"/></exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="config"/>.<see cref="IBlake2BConfig.HashSizeInBits"/>;<paramref name="config"/>.<see cref="IBlake2BConfig.HashSizeInBits"/> must be a multiple of 8.</exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="config"/>.<see cref="IBlake2BConfig.Key"/>;Expected: <paramref name="config"/>.<see cref="IBlake2BConfig.Key"/>.Count <= <see cref="MaxKeySizeBytes"/></exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="config"/>.<see cref="IBlake2BConfig.Salt"/>;Expected: <paramref name="config"/>.<see cref="IBlake2BConfig.Salt"/>.Count == <see cref="SaltSizeBytes"/></exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="config"/>.<see cref="IBlake2BConfig.Personalization"/>;Expected: <paramref name="config"/>.<see cref="IBlake2BConfig.Personalization"/>.Count == <see cref="PersonalizationSizeBytes"/></exception>
public Blake2B_Implementation(IBlake2BConfig config)
{
if (config == null)
{
throw new ArgumentNullException(nameof(config));
}
_config = config.Clone();
if (_config.HashSizeInBits < MinHashSizeBits || _config.HashSizeInBits > MaxHashSizeBits)
{
throw new ArgumentOutOfRangeException($"{nameof(config)}.{nameof(config.HashSizeInBits)}", _config.HashSizeInBits, $"Expected: {MinHashSizeBits} >= {nameof(config)}.{nameof(config.HashSizeInBits)} <= {MaxHashSizeBits}");
}
if (_config.HashSizeInBits % 8 != 0)
{
throw new ArgumentOutOfRangeException($"{nameof(config)}.{nameof(config.HashSizeInBits)}", _config.HashSizeInBits, $"{ nameof(config) }.{ nameof(config.HashSizeInBits)} must be a multiple of 8.");
}
var keyArray = (_config.Key ?? new byte[0]).ToArray();
var saltArray = (_config.Salt ?? new byte[16]).ToArray();
var personalizationArray = (_config.Personalization ?? new byte[16]).ToArray();
if (keyArray.Length > MaxKeySizeBytes)
{
throw new ArgumentOutOfRangeException($"{nameof(config)}.{nameof(config.Key)}", _config.Key, $"Expected: {nameof(config)}.{nameof(config.Key)}.Count <= {MaxKeySizeBytes}");
}
if (saltArray.Length != SaltSizeBytes)
{
throw new ArgumentOutOfRangeException($"{nameof(config)}.{nameof(config.Salt)}", _config.Salt, $"Expected: {nameof(config)}.{nameof(config.Salt)}.Count == {SaltSizeBytes}");
}
if (personalizationArray.Length != PersonalizationSizeBytes)
{
throw new ArgumentOutOfRangeException($"{nameof(config)}.{nameof(config.Personalization)}", _config.Personalization, $"Expected: {nameof(config)}.{nameof(config.Personalization)}.Count == {PersonalizationSizeBytes}");
}
_originalKeyLength = (uint)keyArray.Length;
_key = new byte[128];
Array.Copy(keyArray, _key, keyArray.Length);
_salt = saltArray;
_personalization = personalizationArray;
}
private static void VerifyConfigB(IBlake2BConfig a_Config, IBlake2BTreeConfig a_TreeConfig, bool a_IsSequential)
{
// digest length
if ((a_Config.HashSize <= 0) || (a_Config.HashSize > 64))
{
throw new ArgumentOutOfRangeHashLibException(InvalidHashSize);
}
// Key length
if (!a_Config.Key.Empty())
{
if (a_Config.Key.Length > 64)
{
throw new ArgumentOutOfRangeHashLibException(InvalidKeyLength);
}
}
// Salt length
if (!a_Config.Salt.Empty())
{
if (a_Config.Salt.Length != 16)
{
throw new ArgumentOutOfRangeHashLibException(InvalidSaltLength);
}
}
// Personalisation length
if (!a_Config.Personalisation.Empty())
{
if (a_Config.Personalisation.Length != 16)
{
throw new ArgumentOutOfRangeHashLibException(InvalidPersonalisationLength);
}
}
// Tree InnerHashSize
if (a_TreeConfig != null)
{
if ((a_IsSequential) && ((a_TreeConfig.InnerHashSize != 0)))
{
throw new ArgumentOutOfRangeHashLibException("a_TreeConfig.TreeIntermediateHashSize");
}
if (a_TreeConfig.InnerHashSize > 64)
{
throw new ArgumentOutOfRangeHashLibException(TreeIncorrectInnerHashSize);
}
}
}
public static unsafe UInt64[] ConfigB(IBlake2BConfig a_Config, IBlake2BTreeConfig a_TreeConfig)
{
bool isSequential;
byte[] buffer = new byte[64];
isSequential = a_TreeConfig == null;
if (isSequential)
{
a_TreeConfig = Blake2BTreeConfig.GetSequentialTreeConfig();
}
VerifyConfigB(a_Config, a_TreeConfig, isSequential);
buffer[0] = (byte)a_Config.HashSize;
buffer[1] = (byte)(a_Config.Key?.Length ?? 0);;
if (a_TreeConfig != null)
{
buffer[2] = a_TreeConfig.FanOut;
buffer[3] = a_TreeConfig.MaxDepth;
Converters.ReadUInt32AsBytesLE(a_TreeConfig.LeafSize, ref buffer, 4);
Converters.ReadUInt64AsBytesLE(a_TreeConfig.NodeOffset, ref buffer, 8);
buffer[16] = a_TreeConfig.NodeDepth;
buffer[17] = a_TreeConfig.InnerHashSize;
}
if (!a_Config.Salt.Empty())
{
Utils.Utils.Memmove(ref buffer, a_Config.Salt, 16 * sizeof(byte), 0, 32);
}
if (!a_Config.Personalisation.Empty())
{
Utils.Utils.Memmove(ref buffer, a_Config.Personalisation, 16 * sizeof(byte), 0, 48);
}
UInt64[] result = new UInt64[8];
fixed(UInt64 *resultPtr = result)
{
fixed(byte *bufferPtr = buffer)
{
Converters.le64_copy((IntPtr)bufferPtr, 0, (IntPtr)resultPtr, 0, buffer.Length * sizeof(byte));
}
}
return(result);
}
} = null; // blake2B tree config object
public Blake2XBConfig(IBlake2BConfig a_Blake2BConfig = null, IBlake2BTreeConfig a_Blake2BTreeConfig = null)
{
Blake2BConfig = a_Blake2BConfig;
Blake2BTreeConfig = a_Blake2BTreeConfig;
} // end cctr
/////////////////////////////////////////// /// <summary> /// Blake Hash Family /// </summary> //////////////////////////////////////////// /// public static IHash CreateBlake2B(IBlake2BConfig a_Config = null, IBlake2BTreeConfig a_TreeConfig = null) => new Blake2B(a_Config ?? Blake2BConfig.DefaultConfig, a_TreeConfig);
/// <summary>
/// <br />Blake2B defaults to setting the expected output length <br />
/// from the <c>HashSize</c> in the <c>Blake2BConfig</c> class. <br />In
/// some cases, however, we do not want this, as the output length <br />
/// of these instances is given by <c>Blake2BTreeConfig.InnerSize</c>
/// instead. <br />
/// </summary>
private Blake2B Blake2BPCreateLeafParam(IBlake2BConfig a_Blake2BConfig, IBlake2BTreeConfig a_Blake2BTreeConfig)
{
return(new Blake2B(a_Blake2BConfig, a_Blake2BTreeConfig));
}