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onedrive: add support for OAuth client credential flow - fixes #6197

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This adds support for the client credential flow oauth method which
requires some special handling in onedrive:

- Special scopes are required
- The tenant is required
- The tenant needs to be used in the oauth URLs

This also:

- refactors the oauth config creation so it isn't duplicated
- defaults the drive_id to the previous one in the config
- updates the documentation

Co-authored-by: Nick Craig-Wood <nick@craig-wood.com>
This commit is contained in:
Martin Hassack 2022-07-26 07:28:37 +01:00 committed by Nick Craig-Wood
parent 65012beea4
commit 2f3e90f671
2 changed files with 113 additions and 38 deletions
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130
backend/onedrive/onedrive.go
View File

@ -64,13 +64,20 @@ const (
// Globals
var (
authPath = "/common/oauth2/v2.0/authorize"
tokenPath = "/common/oauth2/v2.0/token"
// Define the paths used for token operations
commonPathPrefix = "/common" // prefix for the paths if tenant isn't known
authPath = "/oauth2/v2.0/authorize"
tokenPath = "/oauth2/v2.0/token"
scopeAccess = fs.SpaceSepList{"Files.Read", "Files.ReadWrite", "Files.Read.All", "Files.ReadWrite.All", "Sites.Read.All", "offline_access"}
scopeAccessWithoutSites = fs.SpaceSepList{"Files.Read", "Files.ReadWrite", "Files.Read.All", "Files.ReadWrite.All", "offline_access"}
// Description of how to auth for this app for a business account
// When using client credential OAuth flow, scope of .default is required in order
// to use the permissions configured for the application within the tenant
scopeAccessClientCred = fs.SpaceSepList{".default"}
// Base config for how to auth
oauthConfig = &oauthutil.Config{
Scopes: scopeAccess,
ClientID: rcloneClientID,
@ -182,6 +189,14 @@ Choose or manually enter a custom space separated list with all scopes, that rcl
Help: "Read and write access to all resources, without the ability to browse SharePoint sites. \nSame as if disable_site_permission was set to true",
},
},
}, {
Name: "tenant",
Help: `ID of the service principal's tenant. Also called its directory ID.
Set this if using
- Client Credential flow
`,
Sensitive: true,
}, {
Name: "disable_site_permission",
Help: `Disable the request for Sites.Read.All permission.
@ -526,27 +541,54 @@ func chooseDrive(ctx context.Context, name string, m configmap.Mapper, srv *rest
})
}
// Make the oauth config for the backend
func makeOauthConfig(ctx context.Context, opt *Options) (*oauthutil.Config, error) {
// Copy the default oauthConfig
oauthConfig := *oauthConfig
// Set the scopes
oauthConfig.Scopes = opt.AccessScopes
if opt.DisableSitePermission {
oauthConfig.Scopes = scopeAccessWithoutSites
}
// Construct the auth URLs
prefix := commonPathPrefix
if opt.Tenant != "" {
prefix = "/" + opt.Tenant
}
oauthConfig.TokenURL = authEndpoint[opt.Region] + prefix + tokenPath
oauthConfig.AuthURL = authEndpoint[opt.Region] + prefix + authPath
// Check to see if we are using client credentials flow
if opt.ClientCredentials {
// Override scope to .default
oauthConfig.Scopes = scopeAccessClientCred
if opt.Tenant == "" {
return nil, fmt.Errorf("tenant parameter must be set when using %s", config.ConfigClientCredentials)
}
}
return &oauthConfig, nil
}
// Config the backend
func Config(ctx context.Context, name string, m configmap.Mapper, config fs.ConfigIn) (*fs.ConfigOut, error) {
region, graphURL := getRegionURL(m)
func Config(ctx context.Context, name string, m configmap.Mapper, conf fs.ConfigIn) (*fs.ConfigOut, error) {
opt := new(Options)
err := configstruct.Set(m, opt)
if err != nil {
return nil, err
}
_, graphURL := getRegionURL(m)
if config.State == "" {
var accessScopes fs.SpaceSepList
accessScopesString, _ := m.Get("access_scopes")
err := accessScopes.Set(accessScopesString)
// Check to see if this is the start of the state machine execution
if conf.State == "" {
conf, err := makeOauthConfig(ctx, opt)
if err != nil {
return nil, fmt.Errorf("failed to parse access_scopes: %w", err)
return nil, err
}
oauthConfig.Scopes = []string(accessScopes)
disableSitePermission, _ := m.Get("disable_site_permission")
if disableSitePermission == "true" {
oauthConfig.Scopes = scopeAccessWithoutSites
}
oauthConfig.TokenURL = authEndpoint[region] + tokenPath
oauthConfig.AuthURL = authEndpoint[region] + authPath
return oauthutil.ConfigOut("choose_type", &oauthutil.Options{
OAuth2Config: oauthConfig,
OAuth2Config: conf,
})
}
@ -554,9 +596,11 @@ func Config(ctx context.Context, name string, m configmap.Mapper, config fs.Conf
if err != nil {
return nil, fmt.Errorf("failed to configure OneDrive: %w", err)
}
// Create a REST client, build on the OAuth client created above
srv := rest.NewClient(oAuthClient)
switch config.State {
switch conf.State {
case "choose_type":
return fs.ConfigChooseExclusiveFixed("choose_type_done", "config_type", "Type of connection", []fs.OptionExample{{
Value: "onedrive",
@ -582,7 +626,7 @@ func Config(ctx context.Context, name string, m configmap.Mapper, config fs.Conf
}})
case "choose_type_done":
// Jump to next state according to config chosen
return fs.ConfigGoto(config.Result)
return fs.ConfigGoto(conf.Result)
case "onedrive":
return chooseDrive(ctx, name, m, srv, chooseDriveOpt{
opts: rest.Opts{
@ -600,16 +644,22 @@ func Config(ctx context.Context, name string, m configmap.Mapper, config fs.Conf
},
})
case "driveid":
return fs.ConfigInput("driveid_end", "config_driveid_fixed", "Drive ID")
out, err := fs.ConfigInput("driveid_end", "config_driveid_fixed", "Drive ID")
if err != nil {
return out, err
}
// Default the drive_id to the previous version in the config
out.Option.Default, _ = m.Get("drive_id")
return out, nil
case "driveid_end":
return chooseDrive(ctx, name, m, srv, chooseDriveOpt{
finalDriveID: config.Result,
finalDriveID: conf.Result,
})
case "siteid":
return fs.ConfigInput("siteid_end", "config_siteid", "Site ID")
case "siteid_end":
return chooseDrive(ctx, name, m, srv, chooseDriveOpt{
siteID: config.Result,
siteID: conf.Result,
})
case "url":
return fs.ConfigInput("url_end", "config_site_url", `Site URL
@ -620,7 +670,7 @@ Examples:
- "https://XXX.sharepoint.com/teams/ID"
`)
case "url_end":
siteURL := config.Result
siteURL := conf.Result
re := regexp.MustCompile(`https://.*\.sharepoint\.com(/.*)`)
match := re.FindStringSubmatch(siteURL)
if len(match) == 2 {
@ -635,12 +685,12 @@ Examples:
return fs.ConfigInput("path_end", "config_sharepoint_url", `Server-relative URL`)
case "path_end":
return chooseDrive(ctx, name, m, srv, chooseDriveOpt{
relativePath: config.Result,
relativePath: conf.Result,
})
case "search":
return fs.ConfigInput("search_end", "config_search_term", `Search term`)
case "search_end":
searchTerm := config.Result
searchTerm := conf.Result
opts := rest.Opts{
Method: "GET",
RootURL: graphURL,
@ -662,10 +712,10 @@ Examples:
})
case "search_sites":
return chooseDrive(ctx, name, m, srv, chooseDriveOpt{
siteID: config.Result,
siteID: conf.Result,
})
case "driveid_final":
finalDriveID := config.Result
finalDriveID := conf.Result
// Test the driveID and get drive type
opts := rest.Opts{
@ -684,12 +734,12 @@ Examples:
return fs.ConfigConfirm("driveid_final_end", true, "config_drive_ok", fmt.Sprintf("Drive OK?\n\nFound drive %q of type %q\nURL: %s\n", rootItem.Name, rootItem.ParentReference.DriveType, rootItem.WebURL))
case "driveid_final_end":
if config.Result == "true" {
if conf.Result == "true" {
return nil, nil
}
return fs.ConfigGoto("choose_type")
}
return nil, fmt.Errorf("unknown state %q", config.State)
return nil, fmt.Errorf("unknown state %q", conf.State)
}
// Options defines the configuration for this backend
@ -700,7 +750,9 @@ type Options struct {
DriveType string `config:"drive_type"`
RootFolderID string `config:"root_folder_id"`
DisableSitePermission bool `config:"disable_site_permission"`
ClientCredentials bool `config:"client_credentials"`
AccessScopes fs.SpaceSepList `config:"access_scopes"`
Tenant string `config:"tenant"`
ExposeOneNoteFiles bool `config:"expose_onenote_files"`
ServerSideAcrossConfigs bool `config:"server_side_across_configs"`
ListChunk int64 `config:"list_chunk"`
@ -988,12 +1040,11 @@ func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, e
}
rootURL := graphAPIEndpoint[opt.Region] + "/v1.0" + "/drives/" + opt.DriveID
oauthConfig.Scopes = opt.AccessScopes
if opt.DisableSitePermission {
oauthConfig.Scopes = scopeAccessWithoutSites
oauthConfig, err := makeOauthConfig(ctx, opt)
if err != nil {
return nil, err
}
oauthConfig.AuthURL = authEndpoint[opt.Region] + authPath
oauthConfig.TokenURL = authEndpoint[opt.Region] + tokenPath
client := fshttp.NewClient(ctx)
root = parsePath(root)
@ -2559,8 +2610,11 @@ func (o *Object) Update(ctx context.Context, in io.Reader, src fs.ObjectInfo, op
return errors.New("can't upload content to a OneNote file")
}
o.fs.tokenRenewer.Start()
defer o.fs.tokenRenewer.Stop()
// Only start the renewer if we have a valid one
if o.fs.tokenRenewer != nil {
o.fs.tokenRenewer.Start()
defer o.fs.tokenRenewer.Stop()
}
size := src.Size()

21
docs/content/onedrive.md
View File

@ -161,6 +161,27 @@ You may try to [verify you account](https://docs.microsoft.com/en-us/azure/activ
Note: If you have a special region, you may need a different host in step 4 and 5. Here are [some hints](https://github.com/rclone/rclone/blob/bc23bf11db1c78c6ebbf8ea538fbebf7058b4176/backend/onedrive/onedrive.go#L86).
### Using OAuth Client Credential flow
OAuth Client Credential flow will allow rclone to use permissions
directly associated with the Azure AD Enterprise application, rather
that adopting the context of an Azure AD user account.
This flow can be enabled by following the steps below:
1. Create the Enterprise App registration in the Azure AD portal and obtain a Client ID and Client Secret as described above.
2. Ensure that the application has the appropriate permissions and they are assigned as *Application Permissions*
3. Configure the remote, ensuring that *Client ID* and *Client Secret* are entered correctly.
4. In the *Advanced Config* section, enter `true` for `client_credentials` and in the `tenant` section enter the tenant ID.
When it comes to choosing the type of the connection work with the
client credentials flow. In particular the "onedrive" option does not
work. You can use the "sharepoint" option or if that does not find the
correct drive ID type it in manually with the "driveid" option.
**NOTE** Assigning permissions directly to the application means that
anyone with the *Client ID* and *Client Secret* can access your
OneDrive files. Take care to safeguard these credentials.
### Modification times and hashes