13dab7dd24
* Divest api/ package of deps elsewhere in the nomad repo. This will allow making api/ a module without then pulling in the external repo, leading to a package name conflict. This required some migration of tests to an apitests/ folder (can be moved anywhere as it has no deps on it). It also required some duplication of code, notably some test helpers from api/ -> apitests/ and part (but not all) of testutil/ -> api/testutil/. Once there's more separation and an e.g. sdk/ folder those can be removed in favor of a dep on the sdk/ folder, provided the sdk/ folder doesn't depend on api/ or /. * Also remove consul dep from api/ package * Fix stupid linters * Some restructuring
66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package uuid
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"encoding/hex"
|
|
"fmt"
|
|
)
|
|
|
|
// GenerateRandomBytes is used to generate random bytes of given size.
|
|
func GenerateRandomBytes(size int) ([]byte, error) {
|
|
buf := make([]byte, size)
|
|
if _, err := rand.Read(buf); err != nil {
|
|
return nil, fmt.Errorf("failed to read random bytes: %v", err)
|
|
}
|
|
return buf, nil
|
|
}
|
|
|
|
const uuidLen = 16
|
|
|
|
// GenerateUUID is used to generate a random UUID
|
|
func GenerateUUID() (string, error) {
|
|
buf, err := GenerateRandomBytes(uuidLen)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return FormatUUID(buf)
|
|
}
|
|
|
|
func FormatUUID(buf []byte) (string, error) {
|
|
if buflen := len(buf); buflen != uuidLen {
|
|
return "", fmt.Errorf("wrong length byte slice (%d)", buflen)
|
|
}
|
|
|
|
return fmt.Sprintf("%x-%x-%x-%x-%x",
|
|
buf[0:4],
|
|
buf[4:6],
|
|
buf[6:8],
|
|
buf[8:10],
|
|
buf[10:16]), nil
|
|
}
|
|
|
|
func ParseUUID(uuid string) ([]byte, error) {
|
|
if len(uuid) != 2 * uuidLen + 4 {
|
|
return nil, fmt.Errorf("uuid string is wrong length")
|
|
}
|
|
|
|
if uuid[8] != '-' ||
|
|
uuid[13] != '-' ||
|
|
uuid[18] != '-' ||
|
|
uuid[23] != '-' {
|
|
return nil, fmt.Errorf("uuid is improperly formatted")
|
|
}
|
|
|
|
hexStr := uuid[0:8] + uuid[9:13] + uuid[14:18] + uuid[19:23] + uuid[24:36]
|
|
|
|
ret, err := hex.DecodeString(hexStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(ret) != uuidLen {
|
|
return nil, fmt.Errorf("decoded hex is the wrong length")
|
|
}
|
|
|
|
return ret, nil
|
|
}
|