-
Notifications
You must be signed in to change notification settings - Fork 0
/
hasher.go
78 lines (60 loc) · 1.89 KB
/
hasher.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
package main
import (
"encoding/json"
"fmt"
"log/slog"
"os"
"path/filepath"
"github.com/polyscone/tofu/password/argon2"
)
var hasher *Hasher
type Hasher struct {
params argon2.Params
dummy []byte
}
func (h *Hasher) EncodedPasswordHash(password []byte) ([]byte, error) {
return argon2.EncodedHash(nil, password, h.params)
}
func (h *Hasher) CheckPasswordHash(password, encodedHash []byte) (ok, rehash bool, _ error) {
return argon2.Check(password, encodedHash, &h.params)
}
func (h *Hasher) CheckDummyPasswordHash() error {
_, _, err := argon2.Check([]byte("password"), h.dummy, &h.params)
return err
}
func initHasher() error {
var params argon2.Params
paramsCache := filepath.Join(opts.data, "argon2_params.json")
cachedParams, err := os.ReadFile(paramsCache)
if err != nil && !os.IsNotExist(err) {
return fmt.Errorf("read argon2 params: %w", err)
} else if err == nil {
if err := json.Unmarshal(cachedParams, ¶ms); err != nil {
return fmt.Errorf("unmarshal argon2 params: %w", err)
}
}
if params.IsValid() != nil {
slog.Info("detecting new argon2 password hashing parameters, please wait...")
params, _ = argon2.Calibrate(opts.password.duration, argon2.ID, opts.password.memory, opts.password.parallelism)
paramsJSON, err := json.Marshal(params)
if err != nil {
return fmt.Errorf("marshal argon2 params: %w", err)
}
if err := os.WriteFile(paramsCache, paramsJSON, 0755); err != nil {
return fmt.Errorf("write argon2 params: %w", err)
}
slog.Info("new argon2 password hashing parameters detected and cached", "location", paramsCache)
}
if err := params.IsValid(); err != nil {
return fmt.Errorf("invalid argon2 params: %w", err)
}
dummy, err := argon2.EncodedHash(nil, []byte("correct horse battery staple"), params)
if err != nil {
return fmt.Errorf("new dummy hash: %w", err)
}
hasher = &Hasher{
params: params,
dummy: dummy,
}
return nil
}