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ssh_code.go
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ssh_code.go
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package commands
import (
"crypto/tls"
"errors"
"net/http"
"net/http/httputil"
"net/url"
"strings"
"time"
"github.com/cloudfoundry/cli/cf/api"
. "github.com/cloudfoundry/cli/cf/i18n"
"github.com/cloudfoundry/cli/cf/api/authentication"
"github.com/cloudfoundry/cli/cf/command_registry"
"github.com/cloudfoundry/cli/cf/configuration/core_config"
"github.com/cloudfoundry/cli/cf/requirements"
"github.com/cloudfoundry/cli/cf/terminal"
"github.com/cloudfoundry/cli/cf/trace"
"github.com/simonleung8/flags"
)
//go:generate counterfeiter -o fakes/fake_ssh_code_getter.go . SSHCodeGetter
type SSHCodeGetter interface {
command_registry.Command
Get() (string, error)
}
type OneTimeSSHCode struct {
ui terminal.UI
config core_config.ReadWriter
authRepo authentication.AuthenticationRepository
endpointRepo api.EndpointRepository
}
var ErrNoRedirects = errors.New("No redirects")
func init() {
command_registry.Register(OneTimeSSHCode{})
}
func (cmd OneTimeSSHCode) MetaData() command_registry.CommandMetadata {
return command_registry.CommandMetadata{
Name: "ssh-code",
Description: T("Get a one time password for ssh clients"),
Usage: T("CF_NAME ssh-code"),
}
}
func (cmd OneTimeSSHCode) Requirements(requirementsFactory requirements.Factory, fc flags.FlagContext) ([]requirements.Requirement, error) {
if len(fc.Args()) != 0 {
cmd.ui.Failed(T("Incorrect Usage. No argument required\n\n") + command_registry.Commands.CommandUsage("ssh-code"))
}
reqs := append([]requirements.Requirement{}, requirementsFactory.NewApiEndpointRequirement())
return reqs, nil
}
func (cmd OneTimeSSHCode) SetDependency(deps command_registry.Dependency, _ bool) command_registry.Command {
cmd.ui = deps.Ui
cmd.config = deps.Config
cmd.authRepo = deps.RepoLocator.GetAuthenticationRepository()
cmd.endpointRepo = deps.RepoLocator.GetEndpointRepository()
return cmd
}
func (cmd OneTimeSSHCode) Execute(c flags.FlagContext) {
code, err := cmd.Get()
if err != nil {
cmd.ui.Failed(err.Error())
}
cmd.ui.Say(code)
}
func (cmd OneTimeSSHCode) Get() (string, error) {
_, err := cmd.endpointRepo.UpdateEndpoint(cmd.config.ApiEndpoint())
if err != nil {
return "", errors.New(T("Error getting info from v2/info: ") + err.Error())
}
token, err := cmd.authRepo.RefreshAuthToken()
if err != nil {
return "", errors.New(T("Error refreshing oauth token: ") + err.Error())
}
skipCertificateVerify := cmd.config.IsSSLDisabled()
httpClient := &http.Client{
CheckRedirect: func(req *http.Request, _ []*http.Request) error {
dumpRequest(req)
return ErrNoRedirects
},
Timeout: 30 * time.Second,
Transport: &http.Transport{
DisableKeepAlives: true,
TLSClientConfig: &tls.Config{
InsecureSkipVerify: skipCertificateVerify,
},
TLSHandshakeTimeout: 10 * time.Second,
},
}
authorizeURL, err := cmd.authorizeURL()
if err != nil {
return "", errors.New(T("Error getting AuthenticationEndpoint() ") + err.Error())
}
authorizeReq, err := http.NewRequest("GET", authorizeURL, nil)
if err != nil {
return "", err
}
authorizeReq.Header.Add("authorization", token)
resp, err := httpClient.Do(authorizeReq)
if resp != nil {
dumpResponse(resp)
}
if err == nil {
return "", errors.New(T("Authorization server did not redirect with one time code"))
}
if netErr, ok := err.(*url.Error); !ok || netErr.Err != ErrNoRedirects {
return "", errors.New(T("Error requesting one time code from server:" + err.Error()))
}
loc, err := resp.Location()
if err != nil {
return "", errors.New(T("Error getting the redirected lcoation: " + err.Error()))
}
codes := loc.Query()["code"]
if len(codes) != 1 {
return "", errors.New(T("Unable to acquire one time code from authorization response") + "\n" + T("Server did not response with auth code") + "\n")
}
return codes[0], nil
}
func (cmd OneTimeSSHCode) authorizeURL() (string, error) {
authorizeURL, err := url.Parse(cmd.config.UaaEndpoint())
if err != nil {
return "", err
}
values := url.Values{}
values.Set("response_type", "code")
values.Set("grant_type", "authorization_code")
values.Set("client_id", cmd.config.SSHOAuthClient())
authorizeURL.Path = "/oauth/authorize"
authorizeURL.RawQuery = values.Encode()
return authorizeURL.String(), nil
}
func dumpRequest(req *http.Request) {
shouldDisplayBody := !strings.Contains(req.Header.Get("Content-Type"), "multipart/form-data")
dumpedRequest, err := httputil.DumpRequestOut(req, shouldDisplayBody)
if err != nil {
trace.Logger.Printf(T("Error dumping request\n{{.Err}}\n", map[string]interface{}{"Err": err}))
} else {
trace.Logger.Printf("\n%s [%s]\n%s\n", terminal.HeaderColor(T("REQUEST:")), time.Now().Format(time.RFC3339), trace.Sanitize(string(dumpedRequest)))
if !shouldDisplayBody {
trace.Logger.Println(T("[MULTIPART/FORM-DATA CONTENT HIDDEN]"))
}
}
}
func dumpResponse(res *http.Response) {
dumpedResponse, err := httputil.DumpResponse(res, false)
if err != nil {
trace.Logger.Printf(T("Error dumping response\n{{.Err}}\n", map[string]interface{}{"Err": err}))
} else {
trace.Logger.Printf("\n%s [%s]\n%s\n", terminal.HeaderColor(T("RESPONSE:")), time.Now().Format(time.RFC3339), trace.Sanitize(string(dumpedResponse)))
}
}