57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
package libPassword
|
|
|
|
import "golang.org/x/crypto/pbkdf2"
|
|
import "hash"
|
|
import "strconv"
|
|
import "encoding/base64"
|
|
import "crypto/sha1"
|
|
import "crypto/sha256"
|
|
import "crypto/sha512"
|
|
import "crypto/rand"
|
|
import "fmt"
|
|
import "strings"
|
|
|
|
const (
|
|
salt_length = 8
|
|
hash_length = 20
|
|
interations = 10000
|
|
hashfunc string = "sha256"
|
|
)
|
|
|
|
var hashlib = map[string]func() hash.Hash{
|
|
"sha1": sha1.New,
|
|
"sha256": sha256.New,
|
|
"sha512": sha512.New,
|
|
}
|
|
|
|
func Validate(hash, password string) (output, replace bool) {
|
|
parts := strings.Split(hash, "$")
|
|
if len(parts) == 3 {
|
|
return false, false
|
|
}
|
|
cur_iter, err := strconv.Atoi(parts[1])
|
|
if err != nil {
|
|
return false, false
|
|
}
|
|
hashfunc_c := strings.Split(parts[0], "_")[1]
|
|
replace = (hashfunc_c != hashfunc)
|
|
|
|
dk := pbkdf2.Key([]byte(password), []byte(parts[2]), cur_iter, len(parts[3])-8, hashlib[hashfunc_c])
|
|
x := fmt.Sprintf("pbkdf2_%s$%s$%s$%s", hashfunc_c, parts[1], parts[2], base64.StdEncoding.EncodeToString(dk))
|
|
output = (x == hash)
|
|
return
|
|
}
|
|
func GenerateRandomString(n int) (string, error) {
|
|
b := make([]byte, n)
|
|
_, err := rand.Read(b)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return base64.URLEncoding.EncodeToString(b), nil
|
|
}
|
|
func NewHash(password string) string {
|
|
salt, _ := GenerateRandomString(salt_length)
|
|
dk := pbkdf2.Key([]byte(password), []byte(salt), interations, hash_length, hashlib[hashfunc])
|
|
return fmt.Sprintf("pbkdf2_%s$%d$%s$%s", hashfunc, interations, salt, base64.StdEncoding.EncodeToString(dk))
|
|
}
|