public AesKeyUnwrapper(ReadOnlySpan <byte> key, EncryptionAlgorithm encryptionAlgorithm, KeyManagementAlgorithm algorithm)
: base(encryptionAlgorithm, algorithm)
{
Debug.Assert(SymmetricJwk.SupportedKeyManagement(key.Length << 3, algorithm));
Debug.Assert(algorithm.Category == AlgorithmCategory.Aes);
#if SUPPORT_SIMD
if (System.Runtime.Intrinsics.X86.Aes.IsSupported && EncryptionAlgorithm.EnabledAesInstructionSet)
{
if (algorithm == KeyManagementAlgorithm.A128KW)
{
_decryptor = new Aes128BlockDecryptor(key);
}
else if (algorithm == KeyManagementAlgorithm.A256KW)
{
_decryptor = new Aes256BlockDecryptor(key);
}
else if (algorithm == KeyManagementAlgorithm.A192KW)
{
_decryptor = new Aes192BlockDecryptor(key);
}
else
{
ThrowHelper.ThrowNotSupportedException_AlgorithmForKeyWrap(algorithm);
#if NET5_0_OR_GREATER
Unsafe.SkipInit(out _decryptor);
#else
_decryptor = new Aes128BlockDecryptor(default);