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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-13 21:56:59 -05:00
v2fly/id.go
2015-09-16 21:13:13 +02:00

74 lines
1.1 KiB
Go

package core
import (
"crypto/md5"
"encoding/hex"
"github.com/v2ray/v2ray-core/log"
)
const (
IDBytesLen = 16
)
// The ID of en entity, in the form of an UUID.
type ID struct {
String string
Bytes []byte
cmdKey []byte
}
func NewID(id string) (ID, error) {
idBytes, err := UUIDToID(id)
if err != nil {
return ID{}, log.Error("Failed to parse id %s", id)
}
md5hash := md5.New()
md5hash.Write(idBytes)
md5hash.Write([]byte("c48619fe-8f02-49e0-b9e9-edf763e17e21"))
cmdKey := md5.Sum(nil)
return ID{
String: id,
Bytes: idBytes,
cmdKey: cmdKey[:],
}, nil
}
func (v ID) CmdKey() []byte {
return v.cmdKey
}
var byteGroups = []int{8, 4, 4, 4, 12}
// TODO: leverage a full functional UUID library
func UUIDToID(uuid string) (v []byte, err error) {
v = make([]byte, 16)
text := []byte(uuid)
if len(text) < 32 {
err = log.Error("uuid: invalid UUID string: %s", text)
return
}
b := v[:]
for _, byteGroup := range byteGroups {
if text[0] == '-' {
text = text[1:]
}
_, err = hex.Decode(b[:byteGroup/2], text[:byteGroup])
if err != nil {
return
}
text = text[byteGroup:]
b = b[byteGroup/2:]
}
return
}