/// <summary>
/// Initializes a new instance of the <see cref="HmacSha2"/> class.
/// </summary>
/// <param name="sha2"></param>
/// <param name="key"></param>
protected HmacSha2(Sha2 sha2, ReadOnlySpan <byte> key)
{
if (sha2 is null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.sha);
}
Sha2 = sha2;
_keys = new byte[BlockSize * 2];
_innerPadKey = new ReadOnlyMemory <byte>(_keys, 0, BlockSize);
_outerPadKey = new ReadOnlyMemory <byte>(_keys, BlockSize, BlockSize);
if (key.Length > BlockSize)
{
Span <byte> keyPrime = stackalloc byte[sha2.HashSize];
Sha2.ComputeHash(key, keyPrime, default, default);
/// <summary>Initializes a new instance of <see cref="SignatureAlgorithm"/>. </summary>
public SignatureAlgorithm(AlgorithmId id, string name, AlgorithmCategory category, ushort requiredKeySizeInBits, HashAlgorithmName hashAlgorithm)
{
_id = id;
_name = JsonEncodedText.Encode(name);
_category = category;
_requiredKeySizeInBits = requiredKeySizeInBits;
_hashAlgorithm = hashAlgorithm;
_sha = hashAlgorithm.Name switch
{
"SHA256" => Sha256.Shared,
"SHA384" => Sha384.Shared,
"SHA512" => Sha512.Shared,
_ => ShaNull.Shared
};
}
/// <summary>Initializes a new instance of <see cref="KeyManagementAlgorithm"/>. </summary>
public KeyManagementAlgorithm(AlgorithmId id, string name, AlgorithmCategory keyType, KeyManagementAlgorithm wrappedAlgorithm, Sha2 sha2)
: this(id, name, keyType, requiredKeySizeInBits : 0, wrappedAlgorithm, sha2 : sha2, produceEncryptedKey : true)
{
}
public static void ComputeHash(this Sha2 sha2, ReadOnlySpan <byte> source, Span <byte> destination)
{
sha2.ComputeHash(source, destination, default, default);