X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/98d6a7c2db7b8be7050fe7394147df5c5ce392bb..c0cbdeb1567d4a4f190a01d3fe89aa975e51e47b:/sdk/go/auth/auth.go

diff --git a/sdk/go/auth/auth.go b/sdk/go/auth/auth.go
index 4a719e922d..f1c2e243b5 100644
--- a/sdk/go/auth/auth.go
+++ b/sdk/go/auth/auth.go
@@ -1,6 +1,12 @@
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+
 package auth
 
 import (
+	"context"
+	"encoding/base64"
 	"net/http"
 	"net/url"
 	"strings"
@@ -10,28 +16,50 @@ type Credentials struct {
 	Tokens []string
 }
 
-func NewCredentials() *Credentials {
-	return &Credentials{Tokens: []string{}}
+func NewCredentials(tokens ...string) *Credentials {
+	return &Credentials{Tokens: tokens}
+}
+
+func NewContext(ctx context.Context, c *Credentials) context.Context {
+	return context.WithValue(ctx, contextKeyCredentials{}, c)
+}
+
+func FromContext(ctx context.Context) (*Credentials, bool) {
+	c, ok := ctx.Value(contextKeyCredentials{}).(*Credentials)
+	return c, ok
 }
 
-func NewCredentialsFromHTTPRequest(r *http.Request) *Credentials {
+func CredentialsFromRequest(r *http.Request) *Credentials {
+	if c, ok := FromContext(r.Context()); ok {
+		// preloaded by middleware
+		return c
+	}
 	c := NewCredentials()
 	c.LoadTokensFromHTTPRequest(r)
 	return c
 }
 
-// LoadTokensFromHttpRequest loads all tokens it can find in the
+// EncodeTokenCookie accepts a token and returns a byte slice suitable
+// for use as a cookie value, such that it will be decoded correctly
+// by LoadTokensFromHTTPRequest.
+var EncodeTokenCookie func([]byte) string = base64.URLEncoding.EncodeToString
+
+// DecodeTokenCookie accepts a cookie value and returns the encoded
+// token.
+var DecodeTokenCookie func(string) ([]byte, error) = base64.URLEncoding.DecodeString
+
+// LoadTokensFromHTTPRequest loads all tokens it can find in the
 // headers and query string of an http query.
 func (a *Credentials) LoadTokensFromHTTPRequest(r *http.Request) {
 	// Load plain token from "Authorization: OAuth2 ..." header
 	// (typically used by smart API clients)
-	if toks := strings.SplitN(r.Header.Get("Authorization"), " ", 2); len(toks) == 2 && toks[0] == "OAuth2" {
+	if toks := strings.SplitN(r.Header.Get("Authorization"), " ", 2); len(toks) == 2 && (toks[0] == "OAuth2" || toks[0] == "Bearer") {
 		a.Tokens = append(a.Tokens, toks[1])
 	}
 
 	// Load base64-encoded token from "Authorization: Basic ..."
 	// header (typically used by git via credential helper)
-	if _, password, ok := BasicAuth(r); ok {
+	if _, password, ok := r.BasicAuth(); ok {
 		a.Tokens = append(a.Tokens, password)
 	}
 
@@ -51,11 +79,39 @@ func (a *Credentials) LoadTokensFromHTTPRequest(r *http.Request) {
 		a.Tokens = append(a.Tokens, val...)
 	}
 
+	a.loadTokenFromCookie(r)
+
 	// TODO: Load token from Rails session cookie (if Rails site
 	// secret is known)
 }
 
-// TODO: LoadTokensFromHttpRequestBody(). We can't assume in
-// LoadTokensFromHttpRequest() that [or how] we should read and parse
-// the request body. This has to be requested explicitly by the
-// application.
+func (a *Credentials) loadTokenFromCookie(r *http.Request) {
+	cookie, err := r.Cookie("arvados_api_token")
+	if err != nil || len(cookie.Value) == 0 {
+		return
+	}
+	token, err := DecodeTokenCookie(cookie.Value)
+	if err != nil {
+		return
+	}
+	a.Tokens = append(a.Tokens, string(token))
+}
+
+// LoadTokensFromHTTPRequestBody loads credentials from the request
+// body.
+//
+// This is separate from LoadTokensFromHTTPRequest() because it's not
+// always desirable to read the request body. This has to be requested
+// explicitly by the application.
+func (a *Credentials) LoadTokensFromHTTPRequestBody(r *http.Request) error {
+	if r.Header.Get("Content-Type") != "application/x-www-form-urlencoded" {
+		return nil
+	}
+	if err := r.ParseForm(); err != nil {
+		return err
+	}
+	if t := r.PostFormValue("api_token"); t != "" {
+		a.Tokens = append(a.Tokens, t)
+	}
+	return nil
+}