codec

type Authentication struct {
	HMAC hash.Hash
	// contains filtered or unexported fields
}

type Compression struct {
	CompressionStream method.CompressionStream // 压缩流
}

type Decoder struct {
	MsgCreator     gtp.IMsgCreator // 消息对象构建器
	Encryption     IEncryption     // 加密模块
	Authentication IAuthentication // 认证模块
	Compression    ICompression    // 压缩模块
	// contains filtered or unexported fields
}

type Encoder struct {
	Encryption     IEncryption     // 加密模块
	Authentication IAuthentication // 认证模块
	Compression    ICompression    // 压缩模块
	CompressionMin int             // 启用压缩阀值（字节），<=0表示不开启
}

type Encryption struct {
	Cipher     method.Cipher  // 对称密码算法
	Padding    method.Padding // 填充方案
	FetchNonce FetchNonce     // 获取nonce值
}

type FetchNonce = generic.FuncPair0[[]byte, error] // 获取nonce值

type IAuthentication interface {
	// Sign 签名
	Sign(msgId gtp.MsgId, flags gtp.Flags, msgBuf []byte) (dst binaryutil.RecycleBytes, err error)
	// Auth 认证
	Auth(msgId gtp.MsgId, flags gtp.Flags, msgBuf []byte) (dst []byte, err error)
	// SizeOfAddition 附加数据大小
	SizeOfAddition(msgLen int) (int, error)
}

type ICompression interface {
	// Compress 压缩数据
	Compress(src []byte) (dst binaryutil.RecycleBytes, compressed bool, err error)
	// Uncompress 解压缩数据
	Uncompress(src []byte) (dst binaryutil.RecycleBytes, err error)
}

type IEncryption interface {
	// Transforming 变换数据
	Transforming(dst, src []byte) (binaryutil.RecycleBytes, error)
	// SizeOfAddition 附加数据大小
	SizeOfAddition(msgLen int) (int, error)
}

type IValidation interface {
	// Validate 验证消息包
	Validate(msgHead gtp.MsgHead, msgBuf []byte) error
}