62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
|
package auth
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/rand"
|
||
|
|
"crypto/subtle"
|
||
|
|
"encoding/base64"
|
||
|
|
"errors"
|
||
|
|
"fmt"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"golang.org/x/crypto/argon2"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
argonTime = 1
|
||
|
|
argonMemory = 64 * 1024
|
||
|
|
argonThreads = 4
|
||
|
|
argonKeyLen = 32
|
||
|
|
argonSaltLen = 16
|
||
|
|
)
|
||
|
|
|
||
|
|
func HashPassword(password string) (string, error) {
|
||
|
|
if len(password) < 8 {
|
||
|
|
return "", ErrPasswordTooShort
|
||
|
|
}
|
||
|
|
salt := make([]byte, argonSaltLen)
|
||
|
|
if _, err := rand.Read(salt); err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
hash := argon2.IDKey([]byte(password), salt, argonTime, argonMemory, argonThreads, argonKeyLen)
|
||
|
|
b64Salt := base64.RawStdEncoding.EncodeToString(salt)
|
||
|
|
b64Hash := base64.RawStdEncoding.EncodeToString(hash)
|
||
|
|
return fmt.Sprintf("$argon2id$v=%d$m=%d,t=%d,p=%d$%s$%s",
|
||
|
|
argon2.Version, argonMemory, argonTime, argonThreads, b64Salt, b64Hash), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func VerifyPassword(encoded, password string) (bool, error) {
|
||
|
|
parts := strings.Split(encoded, "$")
|
||
|
|
if len(parts) != 6 || parts[1] != "argon2id" {
|
||
|
|
return false, errors.New("invalid password hash format")
|
||
|
|
}
|
||
|
|
var version int
|
||
|
|
if _, err := fmt.Sscanf(parts[2], "v=%d", &version); err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
var memory, timeCost uint32
|
||
|
|
var threads uint8
|
||
|
|
if _, err := fmt.Sscanf(parts[3], "m=%d,t=%d,p=%d", &memory, &timeCost, &threads); err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
salt, err := base64.RawStdEncoding.DecodeString(parts[4])
|
||
|
|
if err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
want, err := base64.RawStdEncoding.DecodeString(parts[5])
|
||
|
|
if err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
got := argon2.IDKey([]byte(password), salt, timeCost, memory, threads, uint32(len(want)))
|
||
|
|
return subtle.ConstantTimeCompare(want, got) == 1, nil
|
||
|
|
}
|