/// <summary>Parses the <see cref="ReadOnlySpan{T}"/> into its <see cref="SignatureAlgorithm"/> representation.</summary>
public static bool TryParse(ReadOnlySpan <byte> value, [NotNullWhen(true)] out SignatureAlgorithm?algorithm)
{
if (value.Length == 5)
{
var first = IntegerMarshal.ReadUInt8(value);
switch (IntegerMarshal.ReadUInt32(value, 1))
{
case _S256 when first == (byte)'H':
algorithm = HS256;
goto Found;
case _S256 when first == (byte)'R':
algorithm = RS256;
goto Found;
case _S256 when first == (byte)'E':
algorithm = ES256;
goto Found;
case _S256 when first == (byte)'P':
algorithm = PS256;
goto Found;
case _S384 when first == (byte)'H':
algorithm = HS384;
goto Found;
case _S384 when first == (byte)'R':
algorithm = RS384;
goto Found;
case _S384 when first == (byte)'E':
algorithm = ES384;
goto Found;
case _S384 when first == (byte)'P':
algorithm = PS384;
goto Found;
case _S512 when first == (byte)'H':
algorithm = HS512;
goto Found;
case _S512 when first == (byte)'R':
algorithm = RS512;
goto Found;
case _S512 when first == (byte)'E':
algorithm = ES512;
goto Found;
case _S512 when first == (byte)'P':
algorithm = PS512;
goto Found;
}
}
else if (value.Length == 4 && IntegerMarshal.ReadUInt32(value) == _none)
{
algorithm = None;
goto Found;
}
else if (value.Length == 6 && IntegerMarshal.ReadUInt48(value) == _ES256K)
{
algorithm = ES256K;
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="SignatureAlgorithm"/> representation.</summary>
/// <param name="value"></param>
/// <param name="algorithm"></param>
public static bool TryParse(ReadOnlySpan <byte> value, [NotNullWhen(true)] out SignatureAlgorithm?algorithm)
{
if (value.Length == 5)
{
var first = IntegerMarshal.ReadUInt8(value);
switch (IntegerMarshal.ReadUInt32(value, 1))
{
case _S256 when first == (byte)'H':
algorithm = HS256;
goto Found;
case _S256 when first == (byte)'R':
algorithm = RS256;
goto Found;
case _S256 when first == (byte)'E':
algorithm = ES256;
goto Found;
case _S256 when first == (byte)'P':
algorithm = PS256;
goto Found;
case _S384 when first == (byte)'H':
algorithm = HS384;
goto Found;
case _S384 when first == (byte)'R':
algorithm = RS384;
goto Found;
case _S384 when first == (byte)'E':
algorithm = ES384;
goto Found;
case _S384 when first == (byte)'P':
algorithm = PS384;
goto Found;
case _S512 when first == (byte)'H':
algorithm = HS512;
goto Found;
case _S512 when first == (byte)'R':
algorithm = RS512;
goto Found;
case _S512 when first == (byte)'E':
algorithm = ES512;
goto Found;
case _S512 when first == (byte)'P':
algorithm = PS512;
goto Found;
}
}
else if (value.Length == 4 && IntegerMarshal.ReadUInt32(value) == _none)
{
algorithm = None;
goto Found;
}
else if (value.Length == 6 && IntegerMarshal.ReadUInt48(value) == _ES256X)
{
algorithm = ES256X;
goto Found;
}
algorithm = null;
return(false);
Found:
return(true);
}
