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/
auth_context.go
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/
auth_context.go
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package auth
import (
"context"
"io/ioutil"
"net/http"
"net/url"
"strings"
"time"
"github.com/coreos/go-oidc"
"github.com/lyft/flyteadmin/pkg/auth/config"
"github.com/lyft/flyteadmin/pkg/auth/interfaces"
"github.com/lyft/flytestdlib/errors"
"github.com/lyft/flytestdlib/logger"
"golang.org/x/oauth2"
)
const (
IdpConnectionTimeout = 10 * time.Second
)
// Please see the comment on the corresponding AuthenticationContext for more information.
type Context struct {
oauth2 *oauth2.Config
claims config.Claims
cookieManager interfaces.CookieHandler
oidcProvider *oidc.Provider
options config.OAuthOptions
userInfoURL *url.URL
baseURL *url.URL
oauth2MetadataURL *url.URL
oidcMetadataURL *url.URL
httpClient *http.Client
}
func (c Context) OAuth2Config() *oauth2.Config {
return c.oauth2
}
func (c Context) Claims() config.Claims {
return c.claims
}
func (c Context) OidcProvider() *oidc.Provider {
return c.oidcProvider
}
func (c Context) CookieManager() interfaces.CookieHandler {
return c.cookieManager
}
func (c Context) Options() config.OAuthOptions {
return c.options
}
func (c Context) GetUserInfoURL() *url.URL {
return c.userInfoURL
}
func (c Context) GetHTTPClient() *http.Client {
return c.httpClient
}
func (c Context) GetBaseURL() *url.URL {
return c.baseURL
}
func (c Context) GetOAuth2MetadataURL() *url.URL {
return c.oauth2MetadataURL
}
func (c Context) GetOIdCMetadataURL() *url.URL {
return c.oidcMetadataURL
}
const (
ErrAuthContext errors.ErrorCode = "AUTH_CONTEXT_SETUP_FAILED"
ErrConfigFileRead errors.ErrorCode = "CONFIG_OPTION_FILE_READ_FAILED"
)
func NewAuthenticationContext(ctx context.Context, options config.OAuthOptions) (Context, error) {
result := Context{
claims: options.Claims,
options: options,
}
// Construct the golang OAuth2 library's own internal configuration object from this package's config
oauth2Config, err := GetOauth2Config(options)
if err != nil {
return Context{}, errors.Wrapf(ErrAuthContext, err, "Error creating OAuth2 library configuration")
}
result.oauth2 = &oauth2Config
// Construct the cookie manager object.
hashKeyBytes, err := ioutil.ReadFile(options.CookieHashKeyFile)
if err != nil {
return Context{}, errors.Wrapf(ErrConfigFileRead, err, "Could not read hash key file")
}
blockKeyBytes, err := ioutil.ReadFile(options.CookieBlockKeyFile)
if err != nil {
return Context{}, errors.Wrapf(ErrConfigFileRead, err, "Could not read block key file")
}
cookieManager, err := NewCookieManager(ctx, string(hashKeyBytes), string(blockKeyBytes))
if err != nil {
logger.Errorf(ctx, "Error creating cookie manager %s", err)
return Context{}, errors.Wrapf(ErrAuthContext, err, "Error creating cookie manager")
}
result.cookieManager = cookieManager
// Construct an oidc Provider, which needs its own http Client.
oidcCtx := oidc.ClientContext(ctx, &http.Client{})
provider, err := oidc.NewProvider(oidcCtx, options.Claims.Issuer)
if err != nil {
return Context{}, errors.Wrapf(ErrAuthContext, err, "Error creating oidc provider w/ issuer [%v]", options.Claims.Issuer)
}
result.oidcProvider = provider
// TODO: Convert all the URLs in this config to the config.URL type
// Then we will not have to do any of the parsing in this code here, and the error handling will be taken care for
// us by the flytestdlib config parser.
// Construct base URL object
base, err := url.Parse(options.BaseURL)
if err != nil {
logger.Errorf(ctx, "Error parsing base URL %s", err)
return Context{}, errors.Wrapf(ErrAuthContext, err, "Error parsing IDP base URL")
}
logger.Infof(ctx, "Base IDP URL is %s", base)
result.baseURL = base
result.oauth2MetadataURL, err = url.Parse(OAuth2MetadataEndpoint)
if err != nil {
logger.Errorf(ctx, "Error parsing oauth2 metadata URL %s", err)
return Context{}, errors.Wrapf(ErrAuthContext, err, "Error parsing metadata URL")
}
logger.Infof(ctx, "Metadata endpoint is %s", result.oauth2MetadataURL)
result.oidcMetadataURL, err = url.Parse(OIdCMetadataEndpoint)
if err != nil {
logger.Errorf(ctx, "Error parsing oidc metadata URL %s", err)
return Context{}, errors.Wrapf(ErrAuthContext, err, "Error parsing metadata URL")
}
logger.Infof(ctx, "Metadata endpoint is %s", result.oidcMetadataURL)
// Construct the URL object for the user info endpoint if applicable
if options.IdpUserInfoEndpoint != "" {
parsedURL, err := url.Parse(options.IdpUserInfoEndpoint)
if err != nil {
logger.Errorf(ctx, "Error parsing total IDP user info path %s as URL %s", options.IdpUserInfoEndpoint, err)
return Context{}, errors.Wrapf(ErrAuthContext, err,
"Error parsing IDP user info path as URL while constructing IDP user info endpoint")
}
finalURL := result.baseURL.ResolveReference(parsedURL)
logger.Infof(ctx, "User info URL for IDP is %s", finalURL.String())
result.userInfoURL = finalURL
}
// Construct an http client for interacting with the IDP if necessary.
result.httpClient = &http.Client{
Timeout: IdpConnectionTimeout,
}
return result, nil
}
// This creates a oauth2 library config object, with values from the Flyte Admin config
func GetOauth2Config(options config.OAuthOptions) (oauth2.Config, error) {
secretBytes, err := ioutil.ReadFile(options.ClientSecretFile)
if err != nil {
return oauth2.Config{}, err
}
secret := strings.TrimSuffix(string(secretBytes), "\n")
return oauth2.Config{
RedirectURL: options.CallbackURL,
ClientID: options.ClientID,
ClientSecret: secret,
Scopes: options.Scopes,
Endpoint: oauth2.Endpoint{
AuthURL: options.AuthorizeURL,
TokenURL: options.TokenURL,
},
}, nil
}