forked from influxdata/influxdb
-
Notifications
You must be signed in to change notification settings - Fork 0
/
github.go
198 lines (175 loc) · 4.95 KB
/
github.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
198
package oauth2
import (
"context"
"crypto/rand"
"encoding/base64"
"errors"
"io"
"net/http"
"strings"
"github.com/google/go-github/github"
"github.com/influxdata/influxdb/chronograf"
"golang.org/x/oauth2"
ogh "golang.org/x/oauth2/github"
)
var _ Provider = &Github{}
// Github provides OAuth Login and Callback server. Callback will set
// an authentication cookie. This cookie's value is a JWT containing
// the user's primary Github email address.
type Github struct {
ClientID string
ClientSecret string
Orgs []string // Optional github organization checking
Logger chronograf.Logger
}
// Name is the name of the provider.
func (g *Github) Name() string {
return "github"
}
// ID returns the github application client id.
func (g *Github) ID() string {
return g.ClientID
}
// Secret returns the github application client secret.
func (g *Github) Secret() string {
return g.ClientSecret
}
// Scopes for github is only the email address and possible organizations if
// we are filtering by organizations.
func (g *Github) Scopes() []string {
scopes := []string{"user:email"}
// In order to access a users orgs, we need the "read:org" scope
// even if g.Orgs == 0
scopes = append(scopes, "read:org")
return scopes
}
// Config is the Github OAuth2 exchange information and endpoints.
func (g *Github) Config() *oauth2.Config {
return &oauth2.Config{
ClientID: g.ID(),
ClientSecret: g.Secret(),
Scopes: g.Scopes(),
Endpoint: ogh.Endpoint,
}
}
// PrincipalID returns the github email address of the user.
func (g *Github) PrincipalID(provider *http.Client) (string, error) {
client := github.NewClient(provider)
// If we need to restrict to a set of organizations, we first get the org
// and filter.
if len(g.Orgs) > 0 {
orgs, err := getOrganizations(client, g.Logger)
if err != nil {
return "", err
}
// Not a member, so, deny permission
if ok := isMember(g.Orgs, orgs); !ok {
g.Logger.Error("Not a member of required github organization")
return "", err
}
}
email, err := getPrimaryEmail(client, g.Logger)
if err != nil {
return "", nil
}
return email, nil
}
// Group returns a comma delimited string of Github organizations
// that a user belongs to in Github
func (g *Github) Group(provider *http.Client) (string, error) {
client := github.NewClient(provider)
orgs, err := getOrganizations(client, g.Logger)
if err != nil {
return "", err
}
groups := []string{}
for _, org := range orgs {
if org.Login != nil {
groups = append(groups, *org.Login)
continue
}
}
return strings.Join(groups, ","), nil
}
func randomString(length int) string {
k := make([]byte, length)
if _, err := io.ReadFull(rand.Reader, k); err != nil {
return ""
}
return base64.StdEncoding.EncodeToString(k)
}
func logResponseError(log chronograf.Logger, resp *github.Response, err error) {
switch resp.StatusCode {
case http.StatusUnauthorized, http.StatusForbidden:
log.Error("OAuth access to email address forbidden ", err.Error())
default:
log.Error("Unable to retrieve Github email ", err.Error())
}
}
// isMember makes sure that the user is in one of the required organizations.
func isMember(requiredOrgs []string, userOrgs []*github.Organization) bool {
for _, requiredOrg := range requiredOrgs {
for _, userOrg := range userOrgs {
if userOrg.Login != nil && *userOrg.Login == requiredOrg {
return true
}
}
}
return false
}
// getOrganizations gets all organization for the currently authenticated user.
func getOrganizations(client *github.Client, log chronograf.Logger) ([]*github.Organization, error) {
// Get all pages of results
var allOrgs []*github.Organization
for {
opt := &github.ListOptions{
PerPage: 10,
}
// Get the organizations for the current authenticated user.
orgs, resp, err := client.Organizations.List(context.TODO(), "", opt)
if err != nil {
logResponseError(log, resp, err)
return nil, err
}
allOrgs = append(allOrgs, orgs...)
if resp.NextPage == 0 {
break
}
opt.Page = resp.NextPage
}
return allOrgs, nil
}
// getPrimaryEmail gets the primary email account for the authenticated user.
func getPrimaryEmail(client *github.Client, log chronograf.Logger) (string, error) {
emails, resp, err := client.Users.ListEmails(context.TODO(), nil)
if err != nil {
logResponseError(log, resp, err)
return "", err
}
email, err := primaryEmail(emails)
if err != nil {
log.Error("Unable to retrieve primary Github email ", err.Error())
return "", err
}
return email, nil
}
func primaryEmail(emails []*github.UserEmail) (string, error) {
for _, m := range emails {
if m != nil && getPrimary(m) && getVerified(m) && m.Email != nil {
return *m.Email, nil
}
}
return "", errors.New("no primary email address")
}
func getPrimary(m *github.UserEmail) bool {
if m == nil || m.Primary == nil {
return false
}
return *m.Primary
}
func getVerified(m *github.UserEmail) bool {
if m == nil || m.Verified == nil {
return false
}
return *m.Verified
}