func Authenticate(buffer *alloc.Buffer) {
fnvHash := fnv.New32a()
fnvHash.Write(buffer.Value)
buffer.PrependHash(fnvHash)
buffer.PrependUint16(uint16(buffer.Len()))
}
func (this *ChunkWriter) Write(payload *alloc.Buffer) error {
totalLength := payload.Len()
payload.SliceBack(AuthSize)
this.auth.Authenticate(payload.Value[:0], payload.Value[AuthSize:])
payload.PrependUint16(uint16(totalLength))
_, err := this.writer.Write(payload.Bytes())
return err
}
func (this *SimpleAuthenticator) Seal(buffer *alloc.Buffer) {
buffer.PrependUint16(uint16(buffer.Len()))
fnvHash := fnv.New32a()
fnvHash.Write(buffer.Value)
buffer.PrependHash(fnvHash)
len := buffer.Len()
xtra := 4 - len%4
if xtra != 0 {
buffer.Slice(0, len+xtra)
}
xorfwd(buffer.Value)
if xtra != 0 {
buffer.Slice(0, len)
}
}
func (this *SRTP) Seal(payload *alloc.Buffer) {
this.number++
payload.PrependUint16(this.number)
payload.PrependUint16(this.header)
}
func (this *UTP) Seal(payload *alloc.Buffer) {
payload.PrependUint16(this.connectionId)
payload.PrependBytes(this.header, this.extension)
}