1package identity
2
3import (
4 "crypto/rand"
5 "encoding/json"
6 "fmt"
7 "strings"
8
9 "github.com/MichaelMure/git-bug/repository"
10 "github.com/MichaelMure/git-bug/util/git"
11 "github.com/MichaelMure/git-bug/util/lamport"
12 "github.com/MichaelMure/git-bug/util/text"
13)
14
15// Version is a complete set of informations about an Identity at a point in time.
16type Version struct {
17 // Private field so not serialized
18 commitHash git.Hash
19
20 // The lamport time at which this version become effective
21 // The reference time is the bug edition lamport clock
22 Time lamport.Time `json:"time"`
23
24 Name string `json:"name"`
25 Email string `json:"email"`
26 Login string `json:"login"`
27 AvatarUrl string `json:"avatar_url"`
28
29 // The set of keys valid at that time, from this version onward, until they get removed
30 // in a new version. This allow to have multiple key for the same identity (e.g. one per
31 // device) as well as revoke key.
32 Keys []Key `json:"pub_keys"`
33
34 // This optional array is here to ensure a better randomness of the identity id to avoid collisions.
35 // It has no functional purpose and should be ignored.
36 // It is advised to fill this array if there is not enough entropy, e.g. if there is no keys.
37 Nonce []byte `json:"nonce,omitempty"`
38}
39
40func (v *Version) Validate() error {
41 if text.Empty(v.Name) && text.Empty(v.Login) {
42 return fmt.Errorf("either name or login should be set")
43 }
44
45 if strings.Contains(v.Name, "\n") {
46 return fmt.Errorf("name should be a single line")
47 }
48
49 if !text.Safe(v.Name) {
50 return fmt.Errorf("name is not fully printable")
51 }
52
53 if strings.Contains(v.Login, "\n") {
54 return fmt.Errorf("login should be a single line")
55 }
56
57 if !text.Safe(v.Login) {
58 return fmt.Errorf("login is not fully printable")
59 }
60
61 if strings.Contains(v.Email, "\n") {
62 return fmt.Errorf("email should be a single line")
63 }
64
65 if !text.Safe(v.Email) {
66 return fmt.Errorf("email is not fully printable")
67 }
68
69 if v.AvatarUrl != "" && !text.ValidUrl(v.AvatarUrl) {
70 return fmt.Errorf("avatarUrl is not a valid URL")
71 }
72
73 if len(v.Nonce) > 64 {
74 return fmt.Errorf("nonce is too big")
75 }
76
77 return nil
78}
79
80// Write will serialize and store the Version as a git blob and return
81// its hash
82func (v *Version) Write(repo repository.Repo) (git.Hash, error) {
83 data, err := json.Marshal(v)
84
85 if err != nil {
86 return "", err
87 }
88
89 hash, err := repo.StoreData(data)
90
91 if err != nil {
92 return "", err
93 }
94
95 return hash, nil
96}
97
98func makeNonce(len int) []byte {
99 result := make([]byte, len)
100 _, err := rand.Read(result)
101 if err != nil {
102 panic(err)
103 }
104 return result
105}