header

Documentation

Index

• Variables
• type WrathHeader
  • func (h *WrathHeader) Decrypt(data []byte) error
  • func (h *WrathHeader) Encode(opcode uint16, size uint32) ([]byte, error)
  • func (h *WrathHeader) Encrypt(data []byte) error
  • func (h *WrathHeader) Init(sessionKey []byte) error
  • func (h *WrathHeader) InitKeys(sessionKey, decryptKey, encryptKey []byte) error

Variables

var (
	ErrCryptoNotInitialized = errors.New("srp/header: header crypto has not been initialized")
	ErrHeaderSizeTooLarge   = errors.New("srp/header: header size is too large")
)

Types

type WrathHeader

type WrathHeader struct {
	// contains filtered or unexported fields
}

WrathHeader is used for encrypting/decrypting world packet headers in WotLK. Once the client has authenticated, all incoming/outgoing headers must be encrypted.

func (*WrathHeader) Decrypt

func (h *WrathHeader) Decrypt(data []byte) error

Decrypt decrypts a client header in-place. If the decrypt cipher is not initialized, Decrypt returns ErrCryptoNotInitialized. Decrypt is safe to use concurrently. Client packet headers must be decrypted once the client has authenticated with the world/realm server.

func (*WrathHeader) Encode

func (h *WrathHeader) Encode(opcode uint16, size uint32) ([]byte, error)

Encode returns a header with opcode and size. Encode expects size to not include the 2 bytes for the opcode, and will add +2 to size. In WotLK, server headers can be either 4 or 5 bytes. Headers will automatically be encrypted if [Init] was called.

func (*WrathHeader) Encrypt

func (h *WrathHeader) Encrypt(data []byte) error

Encrypt encrypts a server header in-place. If the encrypt cipher is not initialized, Encrypt returns ErrCryptoNotInitialized. Encrypt is safe to use concurrently. Server packet headers must be encrypted once the client has authenticated with the world/realm server. [Encode] will call Encrypt once [Init] has been called.

func (*WrathHeader) Init

func (h *WrathHeader) Init(sessionKey []byte) error

Init sets up the ciphers using sessionKey. Init must be called before trying to use [Encrypt] or [Decrypt].

func (*WrathHeader) InitKeys

func (h *WrathHeader) InitKeys(sessionKey, decryptKey, encryptKey []byte) error

InitKeys initializes the ciphers. [Init] should be used instead, unless for some reason different keys are needed.