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https://github.com/e1732a364fed/v2ray_simple.git
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76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
package utils
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import (
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"crypto/rand"
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"encoding/hex"
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"strings"
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)
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const UUID_BytesLen int = 16
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const ExampleUUID = "a684455c-b14f-11ea-bf0d-42010aaa0003"
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type UUID [UUID_BytesLen]byte
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func StrToUUID_slice(s string) []byte {
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bs, err := StrToUUID(s)
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if err != nil {
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return nil
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}
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return bs[:]
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}
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func StrToUUID(s string) (uuid UUID, err error) {
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if len(s) != 36 {
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return uuid, ErrInErr{ErrDesc: "invalid UUID Str", ErrDetail: ErrInvalidData, Data: s}
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}
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b := []byte(strings.Replace(s, "-", "", -1))
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if len(b) != 32 {
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return uuid, ErrInErr{ErrDesc: "invalid UUID Str", ErrDetail: ErrInvalidData, Data: s}
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}
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_, err = hex.Decode(uuid[:], b)
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return
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}
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func UUIDToStr(u []byte) string {
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if len(u) != UUID_BytesLen {
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return ""
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}
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buf := make([]byte, 36)
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hex.Encode(buf[0:8], u[0:4])
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buf[8] = '-'
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hex.Encode(buf[9:13], u[4:6])
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buf[13] = '-'
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hex.Encode(buf[14:18], u[6:8])
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buf[18] = '-'
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hex.Encode(buf[19:23], u[8:10])
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buf[23] = '-'
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hex.Encode(buf[24:], u[10:])
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return string(buf)
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}
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//生成完全随机的uuid,不包含任何uuid版本信息 (即不符合rfc，但是更安全)
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func GenerateUUID() (r UUID) {
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rand.Reader.Read(r[:])
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return
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}
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func GenerateUUIDStr() string {
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bs := GenerateUUID()
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return UUIDToStr(bs[:])
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}
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/*
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GenerateUUID_v4 生成符合v4标准的uuid.
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v4: https://datatracker.ietf.org/doc/html/rfc4122#section-4.4
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variant: https://datatracker.ietf.org/doc/html/rfc4122#section-4.1.1
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version: https://datatracker.ietf.org/doc/html/rfc4122#section-4.1.3
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*/
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func GenerateUUID_v4() (r UUID) {
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rand.Reader.Read(r[:])
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r[6] = (r[6] & 0x0f) | 0x40 // Version 4
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r[8] = (r[8] & 0x3f) | 0x80
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return
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}
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