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
|
package eduvpn
import (
"fmt"
"io/ioutil"
"net/http"
)
func getFileUrl(url string) ([]byte, error) {
// Do a Get request to the specified url
resp, reqErr := http.Get(url)
if reqErr != nil {
return nil, &HTTPResourceError{URL: url, Err: reqErr}
}
// Close the response body at the end
defer resp.Body.Close()
// Check if http response code is ok
if resp.StatusCode != http.StatusOK {
return nil, &HTTPStatusError{URL: url, Status: resp.StatusCode}
}
// Read the body
body, readErr := ioutil.ReadAll(resp.Body)
if readErr != nil {
return nil, &HTTPReadError{URL: url, Err: readErr}
}
return body, nil
}
type DiscoFileError struct {
URL string
Err error
}
func (e *DiscoFileError) Error() string {
return fmt.Sprintf("failed obtaining disco file %s with error %v", e.URL, e.Err)
}
type DiscoSigFileError struct {
URL string
Err error
}
func (e *DiscoSigFileError) Error() string {
return fmt.Sprintf("failed obtaining disco signature file %s with error %v", e.URL, e.Err)
}
type DiscoVerifyError struct {
File string
Sigfile string
Err error
}
func (e *DiscoVerifyError) Error() string {
return fmt.Sprintf("failed verifying file %s with signature %s due to error %v", e.File, e.Sigfile, e.Err)
}
// Helper function that gets a disco json
func getDiscoFile(jsonFile string) (string, error) {
// Get json data
discoURL := "https://disco.eduvpn.org/v2/"
fileURL := discoURL + jsonFile
fileBody, fileErr := getFileUrl(fileURL)
if fileErr != nil {
return "", &DiscoFileError{fileURL, fileErr}
}
// Get signature
sigFile := jsonFile + ".minisig"
sigURL := discoURL + sigFile
sigBody, sigFileErr := getFileUrl(sigURL)
if sigFileErr != nil {
return "", &DiscoSigFileError{URL: sigURL, Err: sigFileErr}
}
// Verify signature
// TODO: Handle this by keeping track of the previous sign time
// Wrappers must do this?
var previousSigTime uint64 = 0
forcePrehash := false
verifySuccess, verifyErr := Verify(string(sigBody), fileBody, jsonFile, previousSigTime, forcePrehash)
if !verifySuccess || verifyErr != nil {
return "", &DiscoVerifyError{File: jsonFile, Sigfile: sigFile, Err: verifyErr}
}
return string(fileBody), nil
}
type GetListError struct {
File string
Err error
}
func (e *GetListError) Error() string {
return fmt.Sprintf("failed getting disco list file %s with error %v", e.File, e.Err)
}
// Get the organization list
func GetOrganizationsList() (string, error) {
file := "organization_list.json"
body, err := getDiscoFile(file)
if err != nil {
return "", &GetListError{File: file, Err: err}
}
return body, nil
}
// Get the server list
func GetServersList() (string, error) {
file := "server_list.json"
body, err := getDiscoFile("server_list.json")
if err != nil {
return "", &GetListError{File: file, Err: err}
}
return body, nil
}
|
