Exemplo n.º 1
0
        private byte[]? ChangeKeyImpl(ReadOnlySpan <byte> key)
        {
            byte[]? modifiedKey = null;

            // If _blockSize is -1 the key isn't going to be extractable by the object holder,
            // so there's no point in recalculating it in managed code.
            if (key.Length > _blockSize && _blockSize > 0)
            {
                // Perform RFC 2104, section 2 key adjustment.
                if (_lazyHashProvider == null)
                {
                    _lazyHashProvider = HashProviderDispenser.CreateHashProvider(_hashAlgorithmId);
                }
                _lazyHashProvider.AppendHashData(key);
                modifiedKey = _lazyHashProvider.FinalizeHashAndReset();
            }

            HashProvider?oldHashProvider = _hMacProvider;

            _hMacProvider = null !;
            oldHashProvider?.Dispose(true);
            _hMacProvider = HashProviderDispenser.CreateMacProvider(_hashAlgorithmId, key);

            return(modifiedKey);
        }
Exemplo n.º 2
0
        public void ChangeKey(byte[] key)
        {
            // If _blockSize is -1 the key isn't going to be extractable by the object holder,
            // so there's no point in recalculating it in managed code.
            if (key.Length > _blockSize && _blockSize > 0)
            {
                // Perform RFC 2104, section 2 key adjustment.
                if (_lazyHashProvider == null)
                {
                    _lazyHashProvider = HashProviderDispenser.CreateHashProvider(_hashAlgorithmId);
                }
                _lazyHashProvider.AppendHashData(key, 0, key.Length);
                key = _lazyHashProvider.FinalizeHashAndReset();
            }

            HashProvider oldHashProvider = _hMacProvider;

            _hMacProvider = null;
            if (oldHashProvider != null)
            {
                oldHashProvider.Dispose(true);
            }
            _hMacProvider = HashProviderDispenser.CreateMacProvider(_hashAlgorithmId, key);

            ActualKey = key;
        }
Exemplo n.º 3
0
        public void ChangeKey(byte[] key)
        {
            HashProvider oldHashProvider = _hashProvider;

            _hashProvider = null;
            if (oldHashProvider != null)
            {
                oldHashProvider.Dispose(true);
            }
            _hashProvider = HashProviderDispenser.CreateMacProvider(_hashAlgorithmId, key);
        }