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package protocol
// ChangeCipherSpec protocol exists to signal transitions in
// ciphering strategies. The protocol consists of a single message,
// which is encrypted and compressed under the current (not the pending)
// connection state. The message consists of a single byte of value 1.
// https://tools.ietf.org/html/rfc5246#section-7.1
type ChangeCipherSpec struct {
}
// ContentType returns the ContentType of this content
func (c ChangeCipherSpec) ContentType() ContentType {
return ContentTypeChangeCipherSpec
}
// Marshal encodes the ChangeCipherSpec to binary
func (c *ChangeCipherSpec) Marshal() ([]byte, error) {
return []byte{0x01}, nil
}
// Unmarshal populates the ChangeCipherSpec from binary
func (c *ChangeCipherSpec) Unmarshal(data []byte) error {
if len(data) == 1 && data[0] == 0x01 {
return nil
}
return errInvalidCipherSpec
}
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