forked from vmware-archive/atc
/
provider.go
205 lines (170 loc) · 5.11 KB
/
provider.go
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package uaa
import (
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"io/ioutil"
"net/http"
"path/filepath"
"strings"
"encoding/json"
"github.com/concourse/atc"
"github.com/concourse/atc/auth/provider"
"github.com/concourse/atc/auth/routes"
"github.com/concourse/atc/auth/verifier"
"github.com/hashicorp/go-multierror"
flags "github.com/jessevdk/go-flags"
"github.com/tedsuo/rata"
"golang.org/x/oauth2"
)
const ProviderName = "uaa"
const DisplayName = "UAA"
var Scopes = []string{"cloud_controller.read"}
type UAAProvider struct {
*oauth2.Config
verifier.Verifier
CFCACert string
}
func init() {
provider.Register(ProviderName, UAATeamProvider{})
}
type UAAAuthConfig struct {
ClientID string `json:"client_id" long:"client-id" description:"Application client ID for enabling UAA OAuth."`
ClientSecret string `json:"client_secret" long:"client-secret" description:"Application client secret for enabling UAA OAuth."`
AuthURL string `json:"auth_url,omitempty" long:"auth-url" description:"UAA AuthURL endpoint."`
TokenURL string `json:"token_url,omitempty" long:"token-url" description:"UAA TokenURL endpoint."`
CFSpaces []string `json:"cf_spaces,omitempty" long:"cf-space" description:"Space GUID for a CF space whose developers will have access."`
CFURL string `json:"cf_url,omitempty" long:"cf-url" description:"CF API endpoint."`
CFCACert FileContentsFlag `json:"cf_ca_cert,omitempty" long:"cf-ca-cert" description:"Path to CF PEM-encoded CA certificate file."`
}
type FileContentsFlag string
func (f *FileContentsFlag) UnmarshalFlag(value string) error {
if value == "" {
return nil
}
matches, err := filepath.Glob(value)
if err != nil {
return fmt.Errorf("failed to expand path '%s': %s", value, err)
}
if len(matches) == 0 {
return fmt.Errorf("path '%s' does not exist", value)
}
if len(matches) > 1 {
return fmt.Errorf("path '%s' resolves to multiple entries: %s", value, strings.Join(matches, ", "))
}
cert, err := ioutil.ReadFile(matches[0])
if err != nil {
return fmt.Errorf("failed to read file from path '%s'", value)
}
*f = FileContentsFlag(cert)
return nil
}
func (*UAAAuthConfig) AuthMethod(oauthBaseURL string, teamName string) atc.AuthMethod {
path, err := routes.OAuthRoutes.CreatePathForRoute(
routes.OAuthBegin,
rata.Params{"provider": ProviderName},
)
if err != nil {
panic("failed to construct oauth begin handler route: " + err.Error())
}
path = path + fmt.Sprintf("?team_name=%s", teamName)
return atc.AuthMethod{
Type: atc.AuthTypeOAuth,
DisplayName: DisplayName,
AuthURL: oauthBaseURL + path,
}
}
func (auth *UAAAuthConfig) IsConfigured() bool {
return auth.ClientID != "" ||
auth.ClientSecret != "" ||
len(auth.CFSpaces) > 0 ||
auth.AuthURL != "" ||
auth.TokenURL != "" ||
auth.CFURL != ""
}
func (auth *UAAAuthConfig) Validate() error {
var errs *multierror.Error
if auth.ClientID == "" || auth.ClientSecret == "" {
errs = multierror.Append(
errs,
errors.New("must specify --uaa-auth-client-id and --uaa-auth-client-secret to use UAA OAuth."),
)
}
if len(auth.CFSpaces) == 0 {
errs = multierror.Append(
errs,
errors.New("must specify --uaa-auth-cf-space to use UAA OAuth."),
)
}
if auth.AuthURL == "" || auth.TokenURL == "" || auth.CFURL == "" {
errs = multierror.Append(
errs,
errors.New("must specify --uaa-auth-auth-url, --uaa-auth-token-url and --uaa-auth-cf-url to use UAA OAuth."),
)
}
return errs.ErrorOrNil()
}
type UAATeamProvider struct{}
func (UAATeamProvider) AddAuthGroup(group *flags.Group) provider.AuthConfig {
flags := &UAAAuthConfig{}
uaGroup, err := group.AddGroup("UAA Authentication", "", flags)
if err != nil {
panic(err)
}
uaGroup.Namespace = "uaa-auth"
return flags
}
func (UAATeamProvider) UnmarshalConfig(config *json.RawMessage) (provider.AuthConfig, error) {
flags := &UAAAuthConfig{}
if config != nil {
err := json.Unmarshal(*config, &flags)
if err != nil {
return nil, err
}
}
return flags, nil
}
func (UAATeamProvider) ProviderConstructor(
config provider.AuthConfig,
redirectURL string,
) (provider.Provider, bool) {
uaaAuth := config.(*UAAAuthConfig)
endpoint := oauth2.Endpoint{}
if uaaAuth.AuthURL != "" && uaaAuth.TokenURL != "" {
endpoint.AuthURL = uaaAuth.AuthURL
endpoint.TokenURL = uaaAuth.TokenURL
}
return UAAProvider{
Verifier: NewSpaceVerifier(
uaaAuth.CFSpaces,
uaaAuth.CFURL,
),
Config: &oauth2.Config{
ClientID: uaaAuth.ClientID,
ClientSecret: uaaAuth.ClientSecret,
Endpoint: endpoint,
Scopes: Scopes,
RedirectURL: redirectURL,
},
CFCACert: string(uaaAuth.CFCACert),
}, true
}
func (p UAAProvider) PreTokenClient() (*http.Client, error) {
transport := &http.Transport{
DisableKeepAlives: true,
}
if p.CFCACert != "" {
caCertPool := x509.NewCertPool()
ok := caCertPool.AppendCertsFromPEM([]byte(p.CFCACert))
if !ok {
return nil, errors.New("failed to use cf certificate")
}
transport.TLSClientConfig = &tls.Config{
RootCAs: caCertPool,
}
}
return &http.Client{
Transport: transport,
}, nil
}