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Improve UUID generator

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https://github.com/XTLS/Xray-core/issues/158
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RPRX 2021-01-12 18:23:54 +00:00 committed by GitHub
parent 157918859f
commit 822afb0cc8
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2 changed files with 28 additions and 8 deletions
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2
common/uuid/uuid.go
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@ -50,6 +50,8 @@ func (u *UUID) Equals(another *UUID) bool {
func New() UUID { func New() UUID {
var uuid UUID var uuid UUID
common.Must2(rand.Read(uuid.Bytes())) common.Must2(rand.Read(uuid.Bytes()))
uuid[6] = (uuid[6] & 0x0f) | (4 << 4)
uuid[8] = (uuid[8]&(0xff>>2) | (0x02 << 6))
return uuid return uuid
} }

34
main/commands/all/uuid.go
View file

@ -8,15 +8,33 @@ import (
) )
var cmdUUID = &base.Command{ var cmdUUID = &base.Command{
UsageLine: "{{.Exec}} uuid", UsageLine: `{{.Exec}} uuid [-i "example"]`,
Short: "Generate new UUIDs", Short: `Generate UUIDv4 or UUIDv5`,
Long: ` Long: `
Generate new UUIDs. Generate UUIDv4 or UUIDv5.
`,
Run: executeUUID, UUIDv4 (random): {{.Exec}} uuid
UUIDv5 (from input): {{.Exec}} uuid -i "example"
`,
} }
func executeUUID(cmd *base.Command, args []string) { func init() {
u := uuid.New() cmdUUID.Run = executeUUID // break init loop
fmt.Println(u.String()) }
var input = cmdUUID.Flag.String("i", "", "")
func executeUUID(cmd *base.Command, args []string) {
var output string
if l := len(*input); l == 0 {
u := uuid.New()
output = u.String()
} else if l <= 30 {
u, _ := uuid.ParseString(*input)
output = u.String()
} else {
output = "Input must be within 30 bytes."
}
fmt.Println(output)
} }