Mercurial > go > multipass

annotate auth/auth.go @ 7:406d3cd76739

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Report errors to the user.
author Paul Fisher <paul@pfish.zone>
date Sat, 24 Oct 2015 23:40:13 -0400
parents c18bc7b9d1d9
children 1c194fa9bbf4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
1 // Package auth contains data structures for authenticating users.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
2
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
3 package auth
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
4
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
5 import (
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
6 "crypto/rand"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
7 "encoding/base64"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
8 "errors"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
9 "math/big"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
10 "strconv"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
11 "strings"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
12
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
13 "golang.org/x/crypto/bcrypt"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
14 )
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
15
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
16 const (
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
17 // default cost stolen from python bcrypt
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
18 bcryptCost = 12
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
19 // we only generate passwords from lowercases for non-ambiguity
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
20 lowercases = "abcdefghijklmnopqrstuvwxyz"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
21 template = "____-____-____-____"
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
22 )
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
23
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
24 var (
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
25 lowercaseLen *big.Int = big.NewInt(int64(len(lowercases)))
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
26 maxID = big.NewInt(0)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
27 )
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
28
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
29 var (
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
30 ShortEntryError error = errors.New("multipass/auth: password entry must have 3 or more fields")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
31 BadIDError = errors.New("multipass/auth: ID field invalid")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
32 Base64Error = errors.New("multipass/auth: can't decode base64 data")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
33 LongDescriptionError = errors.New("multipass/auth: description must be less than 255 bytes")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
34 )
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
35
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
36 func init() {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
37 one := big.NewInt(1)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
38 maxID.Lsh(one, 64)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
39 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
40
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
41 // Entry represents a single entry in the a multipass file.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
42 type Entry struct {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
43 id uint64
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
44 hash string
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
45 description string
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
46 rest []string
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
47 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
48
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
49 // EntryFromShadow creates a new entry from a line in a multipass shadow file.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
50 // The line should not end in a newline.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
51 func EntryFromShadow(shadow string) (*Entry, error) {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
52 segments := strings.Split(shadow, ":")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
53 if len(segments) < 2 {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
54 return nil, ShortEntryError
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
55 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
56 entry := new(Entry)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
57 id, err := strconv.ParseUint(segments[0], 10, 64)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
58 if err != nil {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
59 return nil, BadIDError
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
60 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
61 entry.id = id
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
62 entry.hash = segments[1]
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
63 if len(segments) > 2 {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
64 description, err := base64.StdEncoding.DecodeString(segments[2])
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
65 if err != nil {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
66 return nil, Base64Error
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
67 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
68 entry.description = string(description)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
69 entry.rest = segments[3:]
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
70 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
71 return entry, nil
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
72 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
73
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
74 // NewEntry creates an Entry for the given description.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
75 // It returns the Entry itself and a generated password.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
76 func NewEntry(description string) (entry *Entry, password string, err error) {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
77 if len(description) > 255 {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
78 return nil, "", LongDescriptionError
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
79 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
80 passBytes := genPassword()
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
81 password = string(passBytes)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
82 hashBytes, err := bcrypt.GenerateFromPassword(passBytes, bcryptCost)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
83 if err != nil {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
84 // This is very unexpected.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
85 return nil, "", err
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
86 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
87 e := new(Entry)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
88 e.id = newID()
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
89 e.hash = string(hashBytes)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
90 e.description = description
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
91 return e, password, nil
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
92 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
93
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
94 // ID is a unique 64-bit integer which identifies the entry.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
95 func (e *Entry) ID() uint64 {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
96 return e.id
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
97 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
98
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
99 // Description is the user's description of their password.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
100 func (e *Entry) Description() string {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
101 return e.description
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
102 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
103
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
104 // Authenticate tests whether the password is correct.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
105 func (e *Entry) Authenticate(password string) bool {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
106 err := bcrypt.CompareHashAndPassword([]byte(e.hash), []byte(password))
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
107 return err == nil
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
108 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
109
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
110 // Encode encodes this Entry to a bytestring for writing to a multipass shadow file.
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
111 func (e *Entry) Encode() string {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
112 segments := []string{
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
113 strconv.FormatUint(e.id, 10),
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
114 e.hash,
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
115 base64.StdEncoding.EncodeToString([]byte(e.description)),
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
116 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
117 segments = append(segments, e.rest...)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
118 return strings.Join(segments, ":")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
119 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
120
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
121 func genPassword() []byte {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
122 password := []byte(template)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
123 for group := 0; group < 4; group++ {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
124 base := group * 5
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
125 for chr := 0; chr < 4; chr++ {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
126 password[base+chr] = randChr()
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
127 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
128 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
129 return password
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
130 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
131
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
132 func randChr() byte {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
133 bigIdx, err := rand.Int(rand.Reader, lowercaseLen)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
134 if err != nil {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
135 panic("multipass/auth: can't get a random number")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
136 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
137 idx := bigIdx.Int64()
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
138 return byte(lowercases[idx])
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
139 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
140
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
141 func newID() uint64 {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
142 bigID, err := rand.Int(rand.Reader, maxID)
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
143 if err != nil {
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
144 panic("multipass/auth: can't get a random number")
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
145 }
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
146 return bigID.Uint64()
c18bc7b9d1d9 Basic binaries. checkpassword doesn't yet work.
Paul Fisher <paul@pfish.zone>
parents:
diff changeset
147 }