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package eduvpn
import (
"fmt"
)
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 := HTTPGet(fileURL)
if fileErr != nil {
return "", &DiscoFileError{fileURL, fileErr}
}
// Get signature
sigFile := jsonFile + ".minisig"
sigURL := discoURL + sigFile
sigBody, sigFileErr := HTTPGet(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
}
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