/// <summary>Parses the <see cref="ReadOnlySpan{T}"/> into its <see cref="EncryptionAlgorithm"/> representation.</summary>
public static bool TryParse(ReadOnlySpan <byte> value, [NotNullWhen(true)] out EncryptionAlgorithm?algorithm)
{
if (value.Length == 13)
{
switch (IntegerMarshal.ReadUInt64(value))
{
case _A128CBC_ when IntegerMarshal.ReadUInt64(value, 5) == _BC_HS256:
algorithm = A128CbcHS256;
goto Found;
case _A192CBC_ when IntegerMarshal.ReadUInt64(value, 5) == _BC_HS384:
algorithm = A192CbcHS384;
goto Found;
case _A256CBC_ when IntegerMarshal.ReadUInt64(value, 5) == _BC_HS512:
algorithm = A256CbcHS512;
goto Found;
}
}
else if (value.Length == 7)
{
switch (IntegerMarshal.ReadUInt56(value))
{
case _A128GCM:
algorithm = A128Gcm;
goto Found;
case _A192GCM:
algorithm = A192Gcm;
goto Found;
case _A256GCM:
algorithm = A256Gcm;
goto Found;
}
}
#if NET5_0_OR_GREATER
Unsafe.SkipInit(out algorithm);
#else
algorithm = default;
#endif
return(false);
Found:
return(true);
}
/// <summary>Parses the <see cref="ReadOnlySpan{T}"/> into its <see cref="EncryptionAlgorithm"/> representation.</summary>
/// <param name="value"></param>
/// <param name="algorithm"></param>
public static bool TryParse(ReadOnlySpan <byte> value, [NotNullWhen(true)] out EncryptionAlgorithm?algorithm)
{
if (value.Length == 13)
{
switch (IntegerMarshal.ReadUInt64(value))
{
case _A128CBC_ when IntegerMarshal.ReadUInt64(value, 5) == _BC_HS256:
algorithm = A128CbcHS256;
goto Found;
case _A192CBC_ when IntegerMarshal.ReadUInt64(value, 5) == _BC_HS384:
algorithm = A192CbcHS384;
goto Found;
case _A256CBC_ when IntegerMarshal.ReadUInt64(value, 5) == _BC_HS512:
algorithm = A256CbcHS512;
goto Found;
}
}
else if (value.Length == 7)
{
switch (IntegerMarshal.ReadUInt56(value))
{
case _A128GCM:
algorithm = A128Gcm;
goto Found;
case _A192GCM:
algorithm = A192Gcm;
goto Found;
case _A256GCM:
algorithm = A256Gcm;
goto Found;
}
}
algorithm = null;
return(false);
Found:
return(true);
}