forked from dexidp/dex
-
Notifications
You must be signed in to change notification settings - Fork 0
/
password.go
197 lines (159 loc) · 5 KB
/
password.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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
package user
import (
"encoding/json"
"errors"
"fmt"
"net/url"
"time"
"golang.org/x/crypto/bcrypt"
"github.com/coreos/go-oidc/jose"
"github.com/coreos/go-oidc/key"
"github.com/coreos/go-oidc/oidc"
"github.com/coreos/dex/repo"
)
const (
bcryptHashCost = 10
// Blowfish, the algorithm underlying bcrypt, has a maximum
// password length of 72. We explicitly track and check this
// since the bcrypt library will silently ignore portions of
// a password past the first 72 characters.
maxSecretLength = 72
)
var (
PasswordHasher = DefaultPasswordHasher
ErrorInvalidPassword = errors.New("invalid Password")
ErrorPasswordHashNoMatch = errors.New("password and hash don't match")
ErrorPasswordExpired = errors.New("password has expired")
)
type Hasher func(string) ([]byte, error)
func DefaultPasswordHasher(s string) ([]byte, error) {
pwHash, err := bcrypt.GenerateFromPassword([]byte(s), bcryptHashCost)
if err != nil {
return nil, err
}
return Password(pwHash), nil
}
type Password []byte
func NewPasswordFromPlaintext(plaintext string) (Password, error) {
return PasswordHasher(plaintext)
}
type PasswordInfo struct {
UserID string
Password Password `json:"passwordHash"`
PasswordExpires time.Time `json:"passwordExpires"`
}
func (p PasswordInfo) Authenticate(plaintext string) (*oidc.Identity, error) {
if err := bcrypt.CompareHashAndPassword(p.Password, []byte(plaintext)); err != nil {
return nil, ErrorPasswordHashNoMatch
}
if !p.PasswordExpires.IsZero() && time.Now().After(p.PasswordExpires) {
return nil, ErrorPasswordExpired
}
ident := p.Identity()
return &ident, nil
}
func (p PasswordInfo) Identity() oidc.Identity {
return oidc.Identity{
ID: p.UserID,
}
}
type PasswordInfoRepo interface {
Get(tx repo.Transaction, id string) (PasswordInfo, error)
Update(repo.Transaction, PasswordInfo) error
Create(repo.Transaction, PasswordInfo) error
}
func (u *PasswordInfo) UnmarshalJSON(data []byte) error {
var dec struct {
UserID string `json:"userId"`
PasswordHash []byte `json:"passwordHash"`
PasswordPlaintext string `json:"passwordPlaintext"`
PasswordExpires time.Time `json:"passwordExpires"`
}
err := json.Unmarshal(data, &dec)
if err != nil {
return fmt.Errorf("invalid User entry: %v", err)
}
u.UserID = dec.UserID
if !dec.PasswordExpires.IsZero() {
u.PasswordExpires = dec.PasswordExpires
}
if len(dec.PasswordHash) != 0 {
if dec.PasswordPlaintext != "" {
return ErrorInvalidPassword
}
u.Password = Password(dec.PasswordHash)
return nil
}
if dec.PasswordPlaintext != "" {
u.Password, err = NewPasswordFromPlaintext(dec.PasswordPlaintext)
if err != nil {
return err
}
}
return nil
}
func LoadPasswordInfos(repo PasswordInfoRepo, pws []PasswordInfo) error {
for i, pw := range pws {
err := repo.Create(nil, pw)
if err != nil {
return fmt.Errorf("error loading PasswordInfo[%d]: %q", i, err)
}
}
return nil
}
func NewPasswordReset(userID string, password Password, issuer url.URL, clientID string, callback url.URL, expires time.Duration) PasswordReset {
claims := oidc.NewClaims(issuer.String(), userID, clientID, clock.Now(), clock.Now().Add(expires))
claims.Add(ClaimPasswordResetPassword, string(password))
claims.Add(ClaimPasswordResetCallback, callback.String())
return PasswordReset{claims}
}
type PasswordReset struct {
Claims jose.Claims
}
// ParseAndVerifyPasswordResetToken parses a string into a an
// PasswordReset, verifies the signature, and ensures that required
// claims are present. In addition to the usual claims required by
// the OIDC spec, "aud" and "sub" must be present as well as
// ClaimPasswordResetCallback and ClaimPasswordResetPassword.
func ParseAndVerifyPasswordResetToken(token string, issuer url.URL, keys []key.PublicKey) (PasswordReset, error) {
tokenClaims, err := parseAndVerifyTokenClaims(token, issuer, keys)
if err != nil {
return PasswordReset{}, err
}
pw, ok, err := tokenClaims.Claims.StringClaim(ClaimPasswordResetPassword)
if err != nil {
return PasswordReset{}, err
}
if !ok || pw == "" {
return PasswordReset{}, fmt.Errorf("no %q claim", ClaimPasswordResetPassword)
}
cb, ok, err := tokenClaims.Claims.StringClaim(ClaimPasswordResetCallback)
if err != nil {
return PasswordReset{}, err
}
if _, err := url.Parse(cb); err != nil {
return PasswordReset{}, fmt.Errorf("callback URL not parseable: %v", cb)
}
return PasswordReset{tokenClaims.Claims}, nil
}
func (e PasswordReset) UserID() string {
return assertStringClaim(e.Claims, "sub")
}
func (e PasswordReset) Password() Password {
pw := assertStringClaim(e.Claims, ClaimPasswordResetPassword)
return Password(pw)
}
func (e PasswordReset) Callback() *url.URL {
cb, ok, err := e.Claims.StringClaim(ClaimPasswordResetCallback)
if err != nil {
panic("PasswordReset: error getting string claim. This should be impossible.")
}
if !ok || cb == "" {
return nil
}
cbURL, err := url.Parse(cb)
if err != nil {
panic("PasswordReset: can't parse callback. This should be impossible.")
}
return cbURL
}