static final class HMAC256Generator.HMACKey
extends Object
implements SecretKey

Performance-optimized SecretKey implementation for HMAC operations. This class provides an efficient SecretKey implementation that avoids unnecessary key data copying during construction for improved performance. Unlike standard SecretKeySpec, this implementation maintains a direct reference to the key data while maintaining compatibility with Mac operations.

Implementation Note: getEncoded() returns a copy of the first 32 bytes because the Mac class requires this behavior for proper operation. The full key data may be longer than 32 bytes.